/* ==========================================================================
   ОГЭ-ВЫЖИМКА — Modern Educational Platform Design System
   ========================================================================== */

:root {
  /* Цветовая палитра: Минималистичная глубокая темная тема */
  --bg-primary: #0a0e17;
  --bg-secondary: #111724;
  --bg-tertiary: #171f30;
  --bg-card: #111724;
  --border-color: rgba(255, 255, 255, 0.08);
  --border-focus: #3b82f6;
  
  --text-primary: #f8fafc;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  
  --accent-blue: #3b82f6;
  --accent-cyan: #06b6d4;
  --accent-green: #10b981;
  --accent-yellow: #f59e0b;
  --accent-orange: #f97316;
  --accent-red: #ef4444;
  --accent-purple: #8b5cf6;
  --accent-pink: #ec4899;

  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.2);
  --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.25);
  --shadow-lg: 0 12px 32px rgba(0, 0, 0, 0.35);

  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 14px;
  --radius-full: 9999px;

  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', Consolas, Monaco, monospace;
  
  --transition-fast: 0.15s cubic-bezier(0.16, 1, 0.3, 1);
  --transition-normal: 0.22s cubic-bezier(0.16, 1, 0.3, 1);
}

/* Светлая минималистичная тема */
[data-theme="light"] {
  --bg-primary: #f8fafc;
  --bg-secondary: #ffffff;
  --bg-tertiary: #f1f5f9;
  --bg-card: #ffffff;
  --border-color: #cbd5e1;
  --border-focus: #2563eb;
  
  --text-primary: #0f172a;
  --text-secondary: #334155;
  --text-muted: #64748b;
  
  --shadow-sm: 0 1px 3px rgba(15, 23, 42, 0.08);
  --shadow-md: 0 4px 16px rgba(15, 23, 42, 0.1);
  --shadow-lg: 0 12px 32px rgba(15, 23, 42, 0.14);
}

/* Четкий видимый контур для всех кнопок в белой теме */
[data-theme="light"] .nav-pill-btn {
  background: #ffffff !important;
  border: 1.5px solid #cbd5e1 !important;
  color: #1e293b !important;
  box-shadow: 0 1px 2px rgba(0, 0, 0, 0.05);
}

[data-theme="light"] .nav-pill-btn:hover {
  background: #f1f5f9 !important;
  border-color: #64748b !important;
}

[data-theme="light"] .category-pill {
  border: 1.5px solid #cbd5e1 !important;
  background: #ffffff !important;
  color: #334155 !important;
}

[data-theme="light"] .category-pill:hover {
  background: #f1f5f9 !important;
  border-color: #64748b !important;
}

[data-theme="light"] .category-pill.active {
  background: #0f172a !important;
  color: #ffffff !important;
  border-color: #0f172a !important;
}

[data-theme="light"] .home-subject-card {
  border: 1.5px solid #cbd5e1 !important;
  background: #ffffff !important;
  box-shadow: 0 2px 8px rgba(15, 23, 42, 0.06);
}

[data-theme="light"] .home-subject-card:hover {
  border-color: #64748b !important;
}

[data-theme="light"] .home-subject-footer a {
  border: 1.5px solid #cbd5e1 !important;
  background: #f8fafc !important;
  padding: 0.35rem 0.65rem;
  border-radius: 6px;
  font-weight: 600;
  color: #1e293b !important;
}

[data-theme="light"] .home-subject-footer a:hover {
  background: #f1f5f9 !important;
  border-color: #2563eb !important;
  color: #2563eb !important;
}

[data-theme="light"] .btn-secondary,
[data-theme="light"] .btn-outline {
  border: 1.5px solid #cbd5e1 !important;
  background: #ffffff !important;
  color: #1e293b !important;
}

[data-theme="light"] .nav-capsule-bar {
  border: 1.5px solid #cbd5e1 !important;
  background: #ffffff !important;
}

[data-theme="light"] .nav-capsule-btn {
  border: 1px solid transparent;
  color: #334155 !important;
}

[data-theme="light"] .nav-capsule-btn:hover {
  border-color: #cbd5e1 !important;
  background: #f1f5f9 !important;
}

[data-theme="light"] .nav-capsule-btn.active {
  border: 1.5px solid #0f172a !important;
  background: #0f172a !important;
  color: #ffffff !important;
}

/* Общий сброс и база */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: var(--font-sans);
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  overflow-x: hidden;
  transition: background-color var(--transition-normal), color var(--transition-normal);
}

a {
  color: var(--accent-blue);
  text-decoration: none;
  transition: opacity var(--transition-fast);
}
a:hover {
  text-decoration: underline;
}

button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  background: none;
}

/* ==========================================================================
   Linear / Vercel Modern IT Header (56px Sticky)
   ========================================================================== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  height: 56px;
  background: rgba(10, 14, 23, 0.85);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  padding: 0 1.5rem;
  transition: background var(--transition-normal);
}

[data-theme="light"] .site-header {
  background: rgba(255, 255, 255, 0.9);
}

.header-container {
  max-width: 1400px;
  width: 100%;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.25rem;
}

/* Логотип и брендинг */
.nav-brand {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  text-decoration: none;
  color: var(--text-primary);
  font-weight: 700;
  font-size: 1.15rem;
  letter-spacing: -0.02em;
  flex-shrink: 0;
  transition: opacity var(--transition-fast);
}

.nav-brand:hover {
  opacity: 0.9;
  text-decoration: none;
}

.brand-spark {
  font-size: 1.25rem;
  color: #38bdf8;
  display: flex;
  align-items: center;
  justify-content: center;
  filter: drop-shadow(0 0 8px rgba(56, 189, 248, 0.5));
}

.brand-logo-img {
  width: 28px;
  height: 28px;
  border-radius: 7px;
  object-fit: contain;
  box-shadow: 0 2px 10px rgba(14, 165, 233, 0.4);
  transition: transform var(--transition-fast);
}

.nav-brand:hover .brand-logo-img {
  transform: scale(1.08);
}

.brand-name strong {
  color: #38bdf8;
  font-weight: 800;
  margin-left: 1px;
}

/* Центральная навигация */
.nav-center-menu {
  display: flex;
  align-items: center;
  gap: 0.25rem;
}

.nav-item-link {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.42rem 0.75rem;
  border-radius: var(--radius-sm);
  font-size: 0.86rem;
  font-weight: 500;
  color: var(--text-secondary);
  background: transparent;
  border: 1px solid transparent;
  transition: all var(--transition-fast);
  text-decoration: none;
  cursor: pointer;
  white-space: nowrap;
}

.nav-item-link:hover {
  color: var(--text-primary);
  background: rgba(255, 255, 255, 0.05);
  text-decoration: none;
}

[data-theme="light"] .nav-item-link:hover {
  background: rgba(15, 23, 42, 0.05);
}

.nav-item-link.active {
  color: #38bdf8;
  background: rgba(56, 189, 248, 0.1);
  border-color: rgba(56, 189, 248, 0.25);
  font-weight: 600;
}

.nav-item-icon {
  font-size: 0.95rem;
  line-height: 1;
}

/* Выпадающее меню "Ещё" */
.nav-dropdown-wrapper {
  position: relative;
  display: inline-flex;
}

.dropdown-chevron {
  font-size: 0.75rem;
  opacity: 0.7;
  margin-left: 2px;
  transition: transform var(--transition-fast);
}

.nav-dropdown-wrapper:hover .dropdown-chevron,
.nav-dropdown-menu.open + .dropdown-chevron {
  transform: translateY(1px);
}

.nav-dropdown-menu {
  position: absolute;
  top: calc(100% + 8px);
  right: 0;
  min-width: 240px;
  background: #0f1422;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 0.45rem;
  box-shadow: 0 16px 36px rgba(0, 0, 0, 0.5);
  opacity: 0;
  pointer-events: none;
  transform: translateY(-6px);
  transition: all var(--transition-fast);
  z-index: 120;
  display: flex;
  flex-direction: column;
  gap: 2px;
}

[data-theme="light"] .nav-dropdown-menu {
  background: #ffffff;
  box-shadow: 0 16px 36px rgba(15, 23, 42, 0.12);
}

.nav-dropdown-menu.open {
  opacity: 1;
  pointer-events: auto;
  transform: translateY(0);
}

.nav-dropdown-item {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  width: 100%;
  padding: 0.55rem 0.75rem;
  border-radius: var(--radius-sm);
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--text-secondary);
  text-decoration: none;
  background: transparent;
  border: none;
  cursor: pointer;
  text-align: left;
  transition: all var(--transition-fast);
}

.nav-dropdown-item:hover,
.nav-dropdown-item.active {
  color: #38bdf8;
  background: rgba(56, 189, 248, 0.1);
  text-decoration: none;
}

.nav-dropdown-item .dd-icon {
  font-size: 1rem;
  line-height: 1;
}

.nav-dropdown-divider {
  height: 1px;
  background: var(--border-color);
  margin: 0.35rem 0;
}

.ege-mini-badge {
  margin-left: auto;
  font-size: 0.65rem;
  padding: 0.12rem 0.45rem;
  border-radius: 9999px;
  background: rgba(168, 85, 247, 0.18);
  color: #c084fc;
  border: 1px solid rgba(168, 85, 247, 0.35);
  font-weight: 600;
}

/* Действия справа: поиск, профиль, тема, выход */
.header-right-actions {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  flex-shrink: 0;
}

.header-search-wrap {
  position: relative;
  width: 220px;
  transition: width var(--transition-normal);
}

.header-search-wrap:focus-within {
  width: 280px;
}

.search-input {
  width: 100%;
  height: 34px;
  padding: 0 0.75rem 0 2.1rem;
  border-radius: var(--radius-sm);
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--border-color);
  color: var(--text-primary);
  font-size: 0.82rem;
  outline: none;
  transition: all var(--transition-fast);
}

[data-theme="light"] .search-input {
  background: #f1f5f9;
}

.search-input:focus {
  background: var(--bg-secondary);
  border-color: #3b82f6;
  box-shadow: 0 0 0 2px rgba(59, 130, 246, 0.2);
}

.search-icon {
  position: absolute;
  left: 0.65rem;
  top: 50%;
  transform: translateY(-50%);
  font-size: 0.82rem;
  color: var(--text-muted);
  pointer-events: none;
}

.btn-icon {
  width: 34px;
  height: 34px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-color);
  color: var(--text-secondary);
  background: rgba(255, 255, 255, 0.04);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 0.95rem;
  transition: all var(--transition-fast);
  cursor: pointer;
}

.btn-icon:hover {
  color: var(--text-primary);
  background: rgba(255, 255, 255, 0.08);
  border-color: rgba(255, 255, 255, 0.16);
}

[data-theme="light"] .btn-icon {
  background: #f1f5f9;
}

.nav-pill-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  height: 34px;
  padding: 0 0.75rem;
  border-radius: var(--radius-sm);
  font-size: 0.84rem;
  font-weight: 600;
  border: 1px solid var(--border-color);
  background: rgba(255, 255, 255, 0.04);
  color: var(--text-secondary);
  transition: all var(--transition-fast);
  cursor: pointer;
}

.nav-pill-btn:hover,
.nav-pill-btn.active {
  color: var(--text-primary);
  background: rgba(255, 255, 255, 0.08);
  border-color: rgba(255, 255, 255, 0.16);
}

[data-theme="light"] .nav-pill-btn {
  background: #f1f5f9;
}

.logout-header-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  height: 34px;
  padding: 0 0.75rem;
  border-radius: var(--radius-sm);
  border: 1px solid rgba(239, 68, 68, 0.28);
  background: rgba(239, 68, 68, 0.08);
  color: #f87171;
  font-size: 0.82rem;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.logout-header-btn:hover {
  background: rgba(239, 68, 68, 0.18);
  border-color: rgba(239, 68, 68, 0.5);
  color: #fca5a5;
  transform: translateY(-1px);
}

/* ==========================================================================
   Информационная статусная строка (40px Subheader)
   ========================================================================== */
.app-status-bar {
  height: 38px;
  background: rgba(15, 20, 34, 0.95);
  border-bottom: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  padding: 0 1.5rem;
  font-size: 0.8rem;
  z-index: 90;
}

[data-theme="light"] .app-status-bar {
  background: rgba(248, 250, 252, 0.95);
}

.app-status-inner {
  max-width: 1400px;
  width: 100%;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.status-left,
.status-right {
  display: flex;
  align-items: center;
  gap: 0.65rem;
}

.status-sep {
  color: var(--border-color);
  font-size: 0.8rem;
}

.status-countdown {
  display: flex;
  align-items: center;
  gap: 0.35rem;
  color: var(--text-secondary);
  font-size: 0.78rem;
}

.status-countdown strong {
  color: #fbbf24;
  font-family: var(--font-mono);
  font-size: 0.82rem;
}

.status-chip {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.2rem 0.55rem;
  border-radius: var(--radius-full);
  font-size: 0.75rem;
  font-weight: 600;
  border: 1px solid var(--border-color);
  background: rgba(255, 255, 255, 0.04);
  color: var(--text-secondary);
  cursor: pointer;
  transition: all var(--transition-fast);
}

[data-theme="light"] .status-chip {
  background: rgba(15, 23, 42, 0.04);
}

.status-chip:hover {
  color: var(--text-primary);
  border-color: var(--border-hover);
  background: rgba(255, 255, 255, 0.08);
}

.school-chip {
  border-color: rgba(56, 189, 248, 0.25);
  color: #38bdf8;
  background: rgba(56, 189, 248, 0.08);
}

.school-chip:hover {
  background: rgba(56, 189, 248, 0.16);
  border-color: rgba(56, 189, 248, 0.4);
}

/* Индикатор последнего изменения с живой пульсирующей точкой */
.last-update-indicator {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.15rem 0.55rem;
  border-radius: var(--radius-full);
  background: rgba(56, 139, 253, 0.12);
  border: 1px solid rgba(56, 139, 253, 0.28);
  font-size: 0.72rem;
  font-weight: 600;
  color: #79c0ff;
  line-height: 1.25;
  letter-spacing: 0.01em;
  user-select: none;
  transition: all var(--transition-fast);
}

[data-theme="light"] .last-update-indicator {
  background: rgba(9, 105, 218, 0.07);
  border-color: rgba(9, 105, 218, 0.2);
  color: #0969da;
}

.update-pulse-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: #3fb950;
  box-shadow: 0 0 0 0 rgba(63, 185, 80, 0.7);
  animation: pulseDot 2.2s infinite;
  flex-shrink: 0;
}

@keyframes pulseDot {
  0% {
    transform: scale(0.95);
    box-shadow: 0 0 0 0 rgba(63, 185, 80, 0.7);
  }
  70% {
    transform: scale(1.05);
    box-shadow: 0 0 0 5px rgba(63, 185, 80, 0);
  }
  100% {
    transform: scale(0.95);
    box-shadow: 0 0 0 0 rgba(63, 185, 80, 0);
  }
}

/* ==========================================================================
   Компактная лента предметов (Linear Chips Ribbon)
   ========================================================================== */
.subjects-nav-section {
  max-width: 1400px;
  margin: 1rem auto 0;
  padding: 0 1.5rem;
}

.subjects-nav-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 0.65rem;
  flex-wrap: wrap;
}

.filter-pills {
  display: flex;
  gap: 0.35rem;
  overflow-x: auto;
  scrollbar-width: none;
}

.filter-pills::-webkit-scrollbar {
  display: none;
}

.filter-pill {
  padding: 0.28rem 0.65rem;
  border-radius: var(--radius-full);
  font-size: 0.78rem;
  font-weight: 500;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--border-color);
  color: var(--text-secondary);
  white-space: nowrap;
  cursor: pointer;
  transition: all var(--transition-fast);
}

[data-theme="light"] .filter-pill {
  background: #f1f5f9;
}

.filter-pill:hover {
  color: var(--text-primary);
  border-color: rgba(255, 255, 255, 0.2);
}

.filter-pill.active {
  color: #38bdf8;
  background: rgba(56, 189, 248, 0.12);
  border-color: rgba(56, 189, 248, 0.35);
  font-weight: 600;
}

.subjects-quick-note {
  font-size: 0.74rem;
  color: var(--text-muted);
  font-weight: 600;
  letter-spacing: 0.04em;
}

.subjects-scroll-ribbon {
  display: flex;
  gap: 0.45rem;
  overflow-x: auto;
  padding: 0.15rem 0 0.6rem;
  scrollbar-width: thin;
  -webkit-overflow-scrolling: touch;
}

.subjects-scroll-ribbon::-webkit-scrollbar {
  height: 4px;
}

.subjects-scroll-ribbon::-webkit-scrollbar-thumb {
  background: rgba(255, 255, 255, 0.1);
  border-radius: 4px;
}

.subject-chip {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.42rem 0.8rem;
  border-radius: var(--radius-sm);
  font-size: 0.84rem;
  font-weight: 500;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  color: var(--text-primary);
  cursor: pointer;
  white-space: nowrap;
  flex-shrink: 0;
  transition: all var(--transition-fast);
}

[data-theme="light"] .subject-chip {
  background: #ffffff;
}

.subject-chip:hover {
  border-color: rgba(56, 189, 248, 0.4);
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.25);
}

.subject-chip.active {
  border-color: rgba(56, 189, 248, 0.5);
  background: rgba(56, 189, 248, 0.12);
  box-shadow: 0 0 12px rgba(56, 189, 248, 0.15);
  font-weight: 600;
  color: #38bdf8;
}

[data-theme="light"] .subject-chip.active {
  background: rgba(2, 132, 199, 0.08);
  border-color: rgba(2, 132, 199, 0.4);
  color: #0284c7;
}

.chip-icon {
  font-size: 1.1rem;
  line-height: 1;
}

.chip-title {
  font-size: 0.84rem;
}

.chip-badge {
  font-size: 0.68rem;
  font-weight: 600;
  color: var(--text-muted);
  background: rgba(255, 255, 255, 0.06);
  padding: 0.15rem 0.4rem;
  border-radius: var(--radius-full);
}

[data-theme="light"] .chip-badge {
  background: rgba(15, 23, 42, 0.06);
}

.subject-chip.active .chip-badge {
  color: #38bdf8;
  background: rgba(56, 189, 248, 0.15);
}

/* ==========================================================================
   Поиск и результаты (Search Modal Overlay)
   ========================================================================== */
.search-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.7);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  z-index: 1000;
  display: none;
  align-items: flex-start;
  justify-content: center;
  padding-top: 10vh;
  transition: opacity var(--transition-fast);
}

.search-overlay.open {
  display: flex !important;
}

.search-modal-card {
  max-width: 640px;
  width: 92%;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  box-shadow: 0 24px 60px rgba(0, 0, 0, 0.6);
  overflow: hidden;
  max-height: 75vh;
  display: flex;
  flex-direction: column;
}

.search-modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem 1.25rem;
  border-bottom: 1px solid var(--border-color);
}

.search-modal-title {
  font-weight: 700;
  font-size: 1.05rem;
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

.search-results-list {
  overflow-y: auto;
  padding: 0.75rem;
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

.search-item {
  padding: 0.75rem;
  border-radius: var(--radius-sm);
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--border-color);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.search-item:hover {
  background: rgba(56, 189, 248, 0.08);
  border-color: rgba(56, 189, 248, 0.3);
}

.search-item-subject {
  font-size: 0.75rem;
  font-weight: 700;
  color: #38bdf8;
  margin-bottom: 0.2rem;
}

.search-item-title {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 0.25rem;
}

.search-item-snippet {
  font-size: 0.8rem;
  color: var(--text-secondary);
  line-height: 1.4;
}

/* ==========================================================================
   Main Content Layout
   ========================================================================== */
.main-wrapper {
  max-width: 1400px;
  width: 100%;
  margin: 0 auto;
  padding: 0 1.5rem 3rem;
  flex: 1;
}

.view-tabs {
  display: flex;
  gap: 0.35rem;
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 0.6rem;
  margin-bottom: 1.5rem;
  overflow-x: auto;
  scrollbar-width: none;
  -ms-overflow-style: none;
}
.view-tabs::-webkit-scrollbar {
  display: none;
}

.view-tab-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  padding: 0.5rem 0.9rem;
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--text-secondary);
  border-radius: var(--radius-md);
  border: 1px solid transparent;
  background: transparent;
  transition: all var(--transition-fast);
  white-space: nowrap;
}
.view-tab-btn:hover {
  color: var(--text-primary);
  background: var(--bg-secondary);
  border-color: var(--border-color);
}
.view-tab-btn.active {
  color: #38bdf8;
  background: rgba(56, 189, 248, 0.1);
  border-color: rgba(56, 189, 248, 0.3);
  font-weight: 700;
}

/* ==========================================================================
   Выжимка: Конспекты и Карточки Знаний
   ========================================================================== */
.subject-banner {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  margin-bottom: 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
}

.subject-banner-left {
  display: flex;
  align-items: center;
  gap: 1.2rem;
}

.subject-banner-icon {
  font-size: 2.8rem;
  background: var(--bg-tertiary);
  width: 64px;
  height: 64px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
}

.subject-banner-title {
  font-size: 1.6rem;
  font-weight: 800;
  margin-bottom: 0.25rem;
}

.subject-banner-desc {
  font-size: 0.9rem;
  color: var(--text-secondary);
}

.subject-banner-actions {
  display: flex;
  gap: 0.6rem;
}

.btn-action {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  padding: 0.55rem 1rem;
  font-size: 0.85rem;
  font-weight: 600;
  border-radius: var(--radius-md);
  background: var(--bg-tertiary);
  color: var(--text-primary);
  border: 1px solid var(--border-color);
  transition: all var(--transition-fast);
}
.btn-action:hover {
  background: var(--accent-blue);
  color: white;
  border-color: var(--accent-blue);
}

/* Сетка блоков теории */
.cheatsheet-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(360px, 1fr));
  gap: 1.25rem;
}

@media (max-width: 600px) {
  .cheatsheet-grid {
    grid-template-columns: 1fr;
  }
}

.cheatsheet-card {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: border-color var(--transition-fast);
}
.cheatsheet-card:hover {
  border-color: var(--text-muted);
}

.cheatsheet-header {
  padding: 1rem 1.25rem;
  background: var(--bg-tertiary);
  border-bottom: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.cheatsheet-title {
  font-size: 1.05rem;
  font-weight: 700;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.cheatsheet-body {
  padding: 1.25rem;
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

/* Формулы и математические блоки */
.formula-item {
  background: var(--bg-primary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  padding: 0.85rem 1rem;
  position: relative;
}

.formula-title {
  font-size: 0.82rem;
  font-weight: 700;
  color: var(--accent-blue);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  margin-bottom: 0.35rem;
}

.formula-math {
  font-family: var(--font-mono);
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--text-primary);
  padding: 0.2rem 0;
  overflow-x: auto;
}

.formula-note {
  font-size: 0.82rem;
  color: var(--text-secondary);
  margin-top: 0.35rem;
}

/* Информационные плашки: Внимание / Ловушка / Лайфхак */
.callout {
  border-radius: var(--radius-sm);
  padding: 0.85rem 1rem;
  border-left: 4px solid;
  font-size: 0.88rem;
  margin-bottom: 0.8rem;
  line-height: 1.5;
}

.callout-warning {
  background: rgba(248, 81, 73, 0.1);
  border-color: var(--accent-red);
  color: var(--text-primary);
}
.callout-warning strong {
  color: var(--accent-red);
}

.callout-tip {
  background: rgba(63, 185, 80, 0.1);
  border-color: var(--accent-green);
  color: var(--text-primary);
}
.callout-tip strong {
  color: var(--accent-green);
}

.callout-fipi {
  background: rgba(56, 139, 253, 0.1);
  border-color: var(--accent-blue);
  color: var(--text-primary);
}
.callout-fipi strong {
  color: var(--accent-blue);
}

/* Списки правил и алгоритмов */
.rule-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.55rem;
}

.rule-list li {
  position: relative;
  padding-left: 1.5rem;
  font-size: 0.88rem;
  color: var(--text-secondary);
}

.rule-list li::before {
  content: '✓';
  position: absolute;
  left: 0;
  color: var(--accent-green);
  font-weight: 800;
}

/* ==========================================================================
   Калькулятор баллов ОГЭ
   ========================================================================== */
.calc-container {
  max-width: 860px;
  margin: 0 auto;
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 2rem;
  box-shadow: var(--shadow-md);
}

.calc-header {
  text-align: center;
  margin-bottom: 2rem;
}

.calc-title {
  font-size: 1.8rem;
  font-weight: 800;
  margin-bottom: 0.4rem;
}

.calc-subtitle {
  color: var(--text-secondary);
  font-size: 0.95rem;
}

.calc-form-group {
  margin-bottom: 1.5rem;
}

.calc-label {
  display: block;
  font-size: 0.9rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
  color: var(--text-primary);
}

.calc-select, .calc-input {
  width: 100%;
  padding: 0.8rem 1rem;
  border-radius: var(--radius-md);
  background: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  color: var(--text-primary);
  font-size: 1rem;
  outline: none;
}
.calc-select:focus, .calc-input:focus {
  border-color: var(--border-focus);
}

.calc-special-rules {
  background: var(--bg-primary);
  border: 1px dashed var(--border-color);
  border-radius: var(--radius-md);
  padding: 1rem;
  margin-bottom: 1.5rem;
}

.calc-result-box {
  background: linear-gradient(135deg, rgba(56, 139, 253, 0.15), rgba(124, 58, 237, 0.15));
  border: 2px solid var(--accent-blue);
  border-radius: var(--radius-md);
  padding: 1.5rem;
  text-align: center;
  margin-top: 1.5rem;
}

.calc-grade-display {
  font-size: 3.5rem;
  font-weight: 900;
  line-height: 1;
  color: var(--text-primary);
  margin-bottom: 0.4rem;
}
.calc-grade-display.grade-5 { color: var(--accent-green); }
.calc-grade-display.grade-4 { color: var(--accent-blue); }
.calc-grade-display.grade-3 { color: var(--accent-yellow); }
.calc-grade-display.grade-2 { color: var(--accent-red); }

.calc-status-text {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 0.5rem;
}

.calc-progress-track {
  background: var(--bg-tertiary);
  height: 10px;
  border-radius: var(--radius-full);
  overflow: hidden;
  margin: 1rem 0 0.5rem;
}

.calc-progress-fill {
  height: 100%;
  background: var(--accent-blue);
  transition: width var(--transition-normal);
}

/* Таблица шкал */
.scale-table {
  width: 100%;
  border-collapse: collapse;
  margin-top: 1.5rem;
  font-size: 0.88rem;
}

.scale-table th, .scale-table td {
  padding: 0.65rem 0.8rem;
  border-bottom: 1px solid var(--border-color);
  text-align: left;
}

.scale-table th {
  background: var(--bg-tertiary);
  color: var(--text-secondary);
  font-weight: 600;
}

/* ==========================================================================
   Интерактивный Квиз / Экспресс-тест
   ========================================================================== */
.quiz-container {
  max-width: 860px;
  margin: 0 auto;
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 2rem;
  box-shadow: var(--shadow-md);
}

.quiz-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 1rem;
  margin-bottom: 1.5rem;
}

.quiz-step-badge {
  font-size: 0.82rem;
  font-weight: 700;
  padding: 0.3rem 0.75rem;
  border-radius: var(--radius-full);
  background: rgba(56, 139, 253, 0.15);
  color: var(--accent-blue);
}

.quiz-score-badge {
  font-family: var(--font-mono);
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--accent-yellow);
}

.quiz-question-text {
  font-size: 1.25rem;
  font-weight: 700;
  line-height: 1.4;
  margin-bottom: 1.25rem;
}

.quiz-options-list {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  margin-bottom: 1.5rem;
}

.quiz-option-btn {
  width: 100%;
  text-align: left;
  padding: 1rem 1.25rem;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-color);
  background: var(--bg-tertiary);
  color: var(--text-primary);
  font-size: 0.95rem;
  font-weight: 500;
  transition: all var(--transition-fast);
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.quiz-option-btn:hover:not(:disabled) {
  border-color: var(--border-focus);
  background: rgba(56, 139, 253, 0.1);
}

.quiz-option-btn.correct {
  border-color: var(--accent-green);
  background: rgba(63, 185, 80, 0.2);
  color: var(--accent-green);
  font-weight: 700;
}

.quiz-option-btn.wrong {
  border-color: var(--accent-red);
  background: rgba(248, 81, 73, 0.2);
  color: var(--accent-red);
}

.quiz-explanation-box {
  background: var(--bg-primary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 1rem 1.25rem;
  margin-bottom: 1.5rem;
  animation: fadeIn 0.3s ease;
}

.quiz-explanation-title {
  font-weight: 700;
  font-size: 0.9rem;
  margin-bottom: 0.4rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.quiz-explanation-body {
  font-size: 0.88rem;
  color: var(--text-secondary);
}

.quiz-footer {
  display: flex;
  justify-content: flex-end;
  gap: 0.75rem;
}

/* ==========================================================================
   Чек-лист тем (Трекер подготовки)
   ========================================================================== */
.tracker-container {
  max-width: 900px;
  margin: 0 auto;
}

.tracker-hero {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 1.75rem;
  margin-bottom: 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
  flex-wrap: wrap;
}

.tracker-stats-group {
  display: flex;
  align-items: center;
  gap: 1.5rem;
}

.tracker-circle-progress {
  font-size: 2.2rem;
  font-weight: 900;
  color: var(--accent-blue);
  line-height: 1;
}

.tracker-section {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 1.25rem;
  margin-bottom: 1rem;
}

.tracker-section-title {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 0.85rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.tracker-item {
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
  padding: 0.6rem 0;
  border-bottom: 1px solid var(--border-color);
  cursor: pointer;
}
.tracker-item:last-child {
  border-bottom: none;
}

.tracker-checkbox {
  width: 18px;
  height: 18px;
  margin-top: 0.2rem;
  accent-color: var(--accent-blue);
  cursor: pointer;
}

.tracker-label {
  font-size: 0.92rem;
  color: var(--text-primary);
  flex: 1;
}

.tracker-item.completed .tracker-label {
  text-decoration: line-through;
  color: var(--text-muted);
}

/* ==========================================================================
   Поиск и Модальные окна
   ========================================================================== */
.search-results-overlay {
  position: fixed;
  top: 64px;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.65);
  backdrop-filter: blur(8px);
  z-index: 200;
  display: none;
  padding: 2rem 1.5rem;
  overflow-y: auto;
}
.search-results-overlay.open {
  display: block;
}

.search-results-card {
  max-width: 800px;
  margin: 0 auto;
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  box-shadow: var(--shadow-lg);
}

.search-results-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1rem;
  padding-bottom: 0.75rem;
  border-bottom: 1px solid var(--border-color);
}

.search-item {
  padding: 0.85rem;
  border-radius: var(--radius-md);
  background: var(--bg-tertiary);
  margin-bottom: 0.6rem;
  cursor: pointer;
  transition: all var(--transition-fast);
}
.search-item:hover {
  background: rgba(56, 139, 253, 0.15);
  transform: translateX(4px);
}
.search-item-subject {
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  color: var(--accent-blue);
  margin-bottom: 0.2rem;
}
.search-item-title {
  font-weight: 700;
  font-size: 0.95rem;
  margin-bottom: 0.25rem;
}
.search-item-snippet {
  font-size: 0.82rem;
  color: var(--text-secondary);
}

/* ==========================================================================
   Footer
   ========================================================================== */
.site-footer {
  margin-top: auto;
  border-top: 1px solid var(--border-color);
  background: var(--bg-secondary);
  padding: 2rem 1.5rem;
  font-size: 0.85rem;
  color: var(--text-secondary);
}

.footer-container {
  max-width: 1400px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
}

/* ==========================================================================
   Print Cheatsheet View (Режим печати шпаргалок)
   ========================================================================== */
@media print {
  .site-header, .hero-section, .subjects-nav-section, .view-tabs, .btn-action, .site-footer, .search-results-overlay {
    display: none !important;
  }
  body {
    background: #fff !important;
    color: #000 !important;
    font-size: 11pt;
  }
  .main-wrapper {
    max-width: 100% !important;
    padding: 0 !important;
  }
  .cheatsheet-grid {
    grid-template-columns: 1fr 1fr !important;
    gap: 10px !important;
  }
  .cheatsheet-card {
    border: 1px solid #999 !important;
    page-break-inside: avoid;
  }
  .formula-item, .callout {
    border: 1px solid #ccc !important;
  }
}

/* Анимации */
@keyframes fadeIn {
  from { opacity: 0; transform: translateY(6px); }
  to { opacity: 1; transform: translateY(0); }
}

/* ==========================================================================
   Creator Card / Блок создателя в подвале
   ========================================================================== */
.creator-card {
  display: flex;
  align-items: center;
  gap: 0.85rem;
  background: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 0.65rem 1.15rem;
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-fast);
}

.creator-card:hover {
  border-color: var(--accent-blue);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.creator-avatar {
  font-size: 1.6rem;
  background: var(--bg-secondary);
  border-radius: 50%;
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--border-color);
}

.creator-details {
  display: flex;
  flex-direction: column;
}

.creator-role {
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-muted);
  font-weight: 600;
}

.creator-name {
  font-size: 1rem;
  font-weight: 800;
  color: var(--text-primary);
}

.telegram-link-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  background: #229ED9;
  color: #ffffff !important;
  font-size: 0.85rem;
  font-weight: 700;
  padding: 0.5rem 0.95rem;
  border-radius: var(--radius-full);
  text-decoration: none !important;
  box-shadow: 0 4px 12px rgba(34, 158, 217, 0.35);
  transition: all var(--transition-fast);
  margin-left: 0.5rem;
}

.telegram-link-btn:hover {
  background: #1d88bb;
  transform: scale(1.05);
  box-shadow: 0 6px 16px rgba(34, 158, 217, 0.5);
}

.tg-icon {
  width: 18px;
  height: 18px;
}

/* ==========================================================================
   Mobile Bottom Navigation (Removed per design update)
   ========================================================================== */
.mobile-bottom-nav {
  display: none !important;
}

.mobile-nav-btn {
  display: none !important;
}

/* ==========================================================================
   Mobile App Responsive Overrides
   ========================================================================== */
@media (max-width: 768px) {
  body {
    padding-bottom: 0 !important;
    overflow-x: hidden;
  }

  .site-header {
    height: auto;
    min-height: 52px;
    padding: 0.5rem 0.85rem;
    position: sticky;
    top: 0;
    z-index: 100;
  }

  .nav-center-menu {
    display: none !important;
  }

  .header-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 0.5rem;
    width: 100%;
  }

  .nav-brand {
    font-size: 1.02rem;
    gap: 0.35rem;
  }

  .brand-spark {
    font-size: 1.1rem;
  }

  .header-right-actions {
    display: flex;
    align-items: center;
    gap: 0.35rem;
  }

  .header-search-wrap {
    width: 120px;
  }

  .header-search-wrap:focus-within {
    width: 170px;
  }

  .search-input {
    height: 32px;
    padding: 0 0.5rem 0 1.8rem;
    font-size: 0.76rem;
  }

  .search-icon {
    left: 0.5rem;
    font-size: 0.75rem;
  }

  .profile-header-btn {
    height: 32px;
    padding: 0 0.55rem;
    font-size: 0.78rem;
  }

  .btn-icon {
    width: 32px;
    height: 32px;
    font-size: 0.88rem;
  }

  .print-btn-icon {
    display: none !important;
  }

  .logout-header-btn {
    height: 32px;
    padding: 0 0.55rem;
    font-size: 0.78rem;
  }

  .logout-btn-text {
    display: none;
  }

  /* Статусная строка на мобильном */
  .app-status-bar {
    height: auto;
    min-height: 34px;
    padding: 0.35rem 0.85rem;
  }

  .app-status-inner {
    flex-wrap: wrap;
    gap: 0.4rem;
  }

  .status-left {
    font-size: 0.74rem;
    gap: 0.4rem;
  }

  .status-countdown {
    font-size: 0.74rem;
  }

  .status-right {
    gap: 0.4rem;
  }

  .status-chip {
    font-size: 0.72rem;
    padding: 0.15rem 0.45rem;
  }

  /* Лента предметов на смартфоне */
  .subjects-nav-section {
    padding: 0 0.85rem;
    margin-top: 0.65rem;
    width: 100%;
    box-sizing: border-box;
  }

  .subjects-nav-header {
    margin-bottom: 0.45rem;
  }

  .filter-pills {
    display: flex !important;
    gap: 0.3rem !important;
    overflow-x: auto !important;
    -webkit-overflow-scrolling: touch !important;
    scrollbar-width: none !important;
    padding-bottom: 0.2rem !important;
    width: 100% !important;
  }

  .filter-pill {
    padding: 0.25rem 0.55rem !important;
    font-size: 0.74rem !important;
    flex-shrink: 0 !important;
  }

  .subjects-quick-note {
    display: none;
  }

  .subjects-scroll-ribbon {
    display: flex !important;
    gap: 0.4rem !important;
    overflow-x: auto !important;
    -webkit-overflow-scrolling: touch !important;
    padding: 0.1rem 0 0.5rem !important;
  }

  .subject-chip {
    padding: 0.38rem 0.65rem !important;
    font-size: 0.78rem !important;
    flex-shrink: 0 !important;
  }

  .chip-icon {
    font-size: 1rem !important;
  }

  .chip-title {
    font-size: 0.78rem !important;
  }

  .chip-badge {
    font-size: 0.64rem !important;
    padding: 0.1rem 0.35rem !important;
  }


  .main-wrapper {
    padding: 0 0.75rem 2rem;
    width: 100%;
    box-sizing: border-box;
  }

  /* ТАБЫ РАЗДЕЛОВ НА МОБИЛЬНОМ: СВАЙП-ПАНЕЛЬ СО ВСЕМИ 6 КНОПКАМИ */
  .view-tabs {
    display: flex !important;
    overflow-x: auto !important;
    -webkit-overflow-scrolling: touch !important;
    scrollbar-width: none !important;
    gap: 0.4rem !important;
    padding: 0.2rem 0.1rem 0.6rem !important;
    margin-bottom: 1rem !important;
    width: 100% !important;
    box-sizing: border-box !important;
  }
  .view-tabs::-webkit-scrollbar {
    display: none !important;
  }

  .view-tab-btn {
    flex-shrink: 0 !important;
    padding: 0.45rem 0.8rem !important;
    font-size: 0.78rem !important;
    border-radius: var(--radius-full) !important;
    white-space: nowrap !important;
  }

  /* Скрываем мобильную нижнюю панель */
  .mobile-bottom-nav {
    display: none !important;
  }

  /* На мобильных капсульная панель предметов переносится на вторую строку шапки */
  .nav-capsule-bar {
    order: 3;
    width: 100%;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
    border-radius: 12px;
    padding: 3px 6px;
    justify-content: flex-start;
    margin-top: 0.25rem;
    background: rgba(15, 23, 42, 0.9);
    border: 1px solid rgba(255, 255, 255, 0.08);
  }
  .nav-capsule-bar::-webkit-scrollbar {
    display: none;
  }
  .nav-capsule-btn {
    flex-shrink: 0;
    padding: 0.35rem 0.65rem;
    font-size: 0.76rem;
    gap: 0.3rem;
  }

  .subject-banner {
    padding: 1rem;
    flex-direction: column;
    align-items: flex-start;
  }

  .subject-banner-actions {
    width: 100%;
    margin-top: 0.6rem;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
  }

  .subject-banner-actions .btn-action {
    width: 100%;
    justify-content: center;
  }

  .footer-container {
    flex-direction: column;
    align-items: stretch;
    gap: 1.25rem;
  }

  .creator-card {
    justify-content: space-between;
    width: 100%;
  }
}

/* ==========================================================================
   Школа № 6 и Библиотеки с. Прокудское
   ========================================================================== */
.school-highlight-btn {
  background: linear-gradient(135deg, rgba(210, 153, 34, 0.2), rgba(240, 136, 62, 0.2)) !important;
  border-color: var(--accent-yellow) !important;
  color: var(--accent-yellow) !important;
  font-weight: 700 !important;
}
.school-highlight-btn:hover {
  background: var(--accent-yellow) !important;
  color: #000000 !important;
  transform: translateY(-2px);
  box-shadow: 0 4px 14px rgba(210, 153, 34, 0.35);
}

.tab-school-btn {
  border: 1px dashed var(--accent-yellow) !important;
}

.school-portal-container {
  max-width: 1100px;
  margin: 0 auto;
}

.school-hero-banner {
  background: linear-gradient(135deg, rgba(210, 153, 34, 0.12), rgba(56, 139, 253, 0.08));
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 2rem;
  margin-bottom: 2rem;
  text-align: center;
}

.school-badge-tag {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.8rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  padding: 0.35rem 0.85rem;
  border-radius: var(--radius-full);
  background: rgba(210, 153, 34, 0.2);
  color: var(--accent-yellow);
  margin-bottom: 0.9rem;
}

.school-hero-title {
  font-size: 1.85rem;
  font-weight: 900;
  line-height: 1.25;
  margin-bottom: 0.75rem;
  color: var(--text-primary);
}

.school-hero-subtitle {
  font-size: 0.98rem;
  color: var(--text-secondary);
  max-width: 750px;
  margin: 0 auto;
  line-height: 1.55;
}

.libraries-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(380px, 1fr));
  gap: 1.75rem;
}

@media (max-width: 500px) {
  .libraries-grid {
    grid-template-columns: 1fr;
  }
}

.library-card {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  box-shadow: var(--shadow-md);
  transition: all var(--transition-normal);
}

.library-card:hover {
  transform: translateY(-4px);
  border-color: var(--accent-blue);
  box-shadow: var(--shadow-lg);
}

.library-image-wrap {
  position: relative;
  width: 100%;
  height: 240px;
  overflow: hidden;
  background: var(--bg-tertiary);
}

.library-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-normal);
}

.library-card:hover .library-img {
  transform: scale(1.04);
}

.library-status-tag {
  position: absolute;
  top: 1rem;
  left: 1rem;
  background: rgba(13, 17, 23, 0.85);
  backdrop-filter: blur(10px);
  border: 1px solid rgba(255, 255, 255, 0.15);
  color: #fff;
  font-size: 0.75rem;
  font-weight: 700;
  padding: 0.35rem 0.75rem;
  border-radius: var(--radius-full);
}

.library-status-tag.tag-kdc {
  background: rgba(37, 99, 235, 0.85);
}

/* Стили для карточек библиотек без фото / без аватарки */
.library-card.no-image {
  border-top: 3px solid #38bdf8;
}

.library-card-header-bar {
  padding: 1.25rem 1.5rem 0.5rem 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 0.75rem;
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
  background: rgba(255, 255, 255, 0.02);
}

.library-card-icon-tag {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
}

.lib-header-icon {
  font-size: 1.25rem;
}

.library-status-tag-static {
  background: rgba(56, 189, 248, 0.15);
  border: 1px solid rgba(56, 189, 248, 0.3);
  color: #38bdf8;
  font-size: 0.75rem;
  font-weight: 700;
  padding: 0.3rem 0.7rem;
  border-radius: var(--radius-full);
}

.library-read-hall-tag {
  font-size: 0.75rem;
  color: var(--text-muted);
  font-weight: 600;
  background: rgba(255, 255, 255, 0.04);
  padding: 0.25rem 0.65rem;
  border-radius: var(--radius-full);
}

.library-info {
  padding: 1.5rem;
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 0.9rem;
}

.library-title {
  font-size: 1.2rem;
  font-weight: 800;
  line-height: 1.3;
}

.library-address-line {
  display: flex;
  align-items: flex-start;
  gap: 0.55rem;
  background: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 0.75rem 0.9rem;
  font-size: 0.88rem;
}

.lib-icon {
  font-size: 1.1rem;
  line-height: 1;
}

.lib-subtext {
  font-size: 0.78rem;
  color: var(--text-muted);
  margin-top: 0.2rem;
}

.library-desc {
  font-size: 0.88rem;
  color: var(--text-secondary);
  line-height: 1.5;
}

.library-features {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
  margin-top: auto;
}

.lib-feat {
  font-size: 0.75rem;
  font-weight: 600;
  background: var(--bg-tertiary);
  padding: 0.3rem 0.6rem;
  border-radius: var(--radius-sm);
  color: var(--text-secondary);
  border: 1px solid var(--border-color);
}

.library-actions {
  margin-top: 0.5rem;
}

.map-btn {
  width: 100%;
  justify-content: center;
  padding: 0.65rem 1rem;
  font-size: 0.9rem;
}

/* ==========================================================================
   Кнопки и бейджи: Подготовка к ЕГЭ (В разработке)
   ========================================================================== */
.ege-badge-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.45rem 1rem;
  border-radius: var(--radius-full);
  font-size: 0.84rem;
  font-weight: 700;
  background: linear-gradient(135deg, rgba(163, 113, 247, 0.18), rgba(219, 97, 162, 0.18));
  border: 1px solid rgba(163, 113, 247, 0.4);
  color: #d2a8ff;
  cursor: pointer;
  transition: all var(--transition-fast);
  box-shadow: 0 2px 10px rgba(163, 113, 247, 0.15);
  white-space: nowrap;
}
.ege-badge-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 16px rgba(163, 113, 247, 0.3);
  border-color: #d2a8ff;
  color: #ffffff;
}

.ege-tag-soon {
  font-size: 0.68rem;
  padding: 0.15rem 0.5rem;
  border-radius: var(--radius-full);
  background: rgba(235, 87, 87, 0.2);
  color: #f87171;
  border: 1px solid rgba(235, 87, 87, 0.4);
  text-transform: uppercase;
  font-weight: 800;
  letter-spacing: 0.04em;
}

.ege-header-btn {
  background: rgba(163, 113, 247, 0.12) !important;
  border-color: rgba(163, 113, 247, 0.35) !important;
  color: #d2a8ff !important;
}
.ege-header-btn:hover {
  background: rgba(163, 113, 247, 0.25) !important;
  border-color: #d2a8ff !important;
  color: #ffffff !important;
}

.ege-tag-pill {
  font-size: 0.65rem;
  padding: 0.1rem 0.4rem;
  border-radius: var(--radius-full);
  background: rgba(235, 87, 87, 0.25);
  color: #fca5a5;
  font-weight: 700;
}

/* ==========================================================================
   Демоверсии и пробники ОГЭ
   ========================================================================== */
.demo-mock-banner {
  background: linear-gradient(135deg, rgba(56, 139, 253, 0.08) 0%, rgba(163, 113, 247, 0.08) 100%);
  border: 1px solid rgba(56, 139, 253, 0.3);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  margin-bottom: 1.5rem;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.15);
}

.demo-mock-top {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 1.5rem;
  flex-wrap: wrap;
}

.demo-mock-badge {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  padding: 0.25rem 0.65rem;
  border-radius: var(--radius-full);
  background: rgba(56, 139, 253, 0.2);
  color: var(--accent-blue);
  border: 1px solid rgba(56, 139, 253, 0.35);
  margin-bottom: 0.5rem;
}

.demo-mock-title {
  font-size: 1.25rem;
  font-weight: 800;
  margin-bottom: 0.4rem;
  color: var(--text-primary);
}

.demo-mock-desc {
  font-size: 0.88rem;
  color: var(--text-secondary);
  line-height: 1.5;
  max-width: 750px;
}

.demo-mock-actions {
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
  min-width: 260px;
}

.demo-action-btn {
  background: var(--accent-blue) !important;
  color: white !important;
  font-weight: 700 !important;
  justify-content: center;
  box-shadow: 0 4px 14px rgba(37, 99, 235, 0.35);
}
.demo-action-btn:hover {
  background: #1d4ed8 !important;
  transform: translateY(-2px);
}

.demo-fipi-link {
  font-size: 0.82rem;
  justify-content: center;
  background: var(--bg-tertiary) !important;
  border-color: var(--border-color) !important;
  color: var(--text-secondary) !important;
  text-decoration: none !important;
}
.demo-fipi-link:hover {
  border-color: var(--accent-blue) !important;
  color: var(--text-primary) !important;
}

.demo-changes-box {
  margin-top: 1rem;
  padding: 0.75rem 1rem;
  border-radius: var(--radius-md);
  background: rgba(210, 153, 34, 0.12);
  border: 1px solid rgba(210, 153, 34, 0.3);
  font-size: 0.85rem;
  color: var(--text-secondary);
  line-height: 1.45;
}

/* ==========================================================================
   Модальные окна (Overlay & Cards)
   ========================================================================== */
.custom-modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.75);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  z-index: 2000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1rem;
  animation: modalFadeIn 0.25s ease-out;
}

@keyframes modalFadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

.custom-modal-card {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 2rem;
  position: relative;
  max-width: 600px;
  width: 100%;
  max-height: 90vh;
  overflow-y: auto;
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.6);
  animation: modalScaleUp 0.25s ease-out;
}

.mock-modal-card {
  max-width: 850px;
  padding: 2rem;
}

@keyframes modalScaleUp {
  from { transform: scale(0.94); opacity: 0; }
  to { transform: scale(1); opacity: 1; }
}

.modal-close-btn {
  position: absolute;
  top: 1rem;
  right: 1.25rem;
  background: none;
  border: none;
  font-size: 1.8rem;
  line-height: 1;
  color: var(--text-muted);
  cursor: pointer;
  transition: color var(--transition-fast);
}
.modal-close-btn:hover {
  color: var(--text-primary);
}

/* Стили карточки ЕГЭ */
.ege-modal-card {
  text-align: center;
}
.ege-modal-badge {
  display: inline-block;
  padding: 0.3rem 0.8rem;
  border-radius: var(--radius-full);
  background: rgba(163, 113, 247, 0.2);
  color: #d2a8ff;
  border: 1px solid rgba(163, 113, 247, 0.4);
  font-size: 0.8rem;
  font-weight: 700;
  margin-bottom: 1rem;
}
.ege-modal-icon {
  font-size: 3.5rem;
  margin-bottom: 0.5rem;
  line-height: 1;
}
.ege-modal-title {
  font-size: 1.5rem;
  font-weight: 900;
  margin-bottom: 0.75rem;
}
.ege-modal-desc {
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: 1.25rem;
}
.ege-modal-features {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  background: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 1rem 1.25rem;
  text-align: left;
}
.ege-feature-item {
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--text-primary);
}
.ege-confirm-btn {
  padding: 0.75rem 2.2rem !important;
  background: var(--accent-blue) !important;
  color: white !important;
  border-radius: var(--radius-full) !important;
  font-weight: 700 !important;
  font-size: 0.95rem !important;
}

/* Стили тренировочного пробника */
.mock-tasks-list {
  display: flex;
  flex-direction: column;
  gap: 1.2rem;
  margin-top: 1.2rem;
}

.mock-task-item {
  background: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 1.25rem;
}

.mock-task-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  margin-bottom: 0.6rem;
}

.mock-task-num {
  font-size: 0.85rem;
  font-weight: 800;
  color: var(--accent-blue);
  background: rgba(56, 139, 253, 0.15);
  padding: 0.2rem 0.6rem;
  border-radius: var(--radius-sm);
}

.mock-task-topic {
  font-size: 0.8rem;
  color: var(--text-muted);
  font-weight: 600;
}

.mock-task-text {
  font-size: 0.95rem;
  line-height: 1.55;
  color: var(--text-primary);
  margin-bottom: 0.85rem;
}

.mock-task-actions {
  display: flex;
  gap: 0.6rem;
}

.mock-solution-box {
  margin-top: 0.85rem;
  padding: 1rem;
  background: var(--bg-card);
  border: 1px solid rgba(46, 160, 67, 0.35);
  border-radius: var(--radius-md);
  animation: fadeIn 0.25s ease;
}

/* Адаптивность для мобильных */
@media (max-width: 768px) {
  .demo-mock-top {
    flex-direction: column;
    align-items: stretch;
  }
  .demo-mock-actions {
    min-width: 0;
    width: 100%;
  }
  .custom-modal-card {
    padding: 1.25rem;
    max-height: 95vh;
  }
  .ege-badge-btn {
    width: 100%;
    justify-content: center;
  }
}

/* ==========================================================================
   Раздел: Стратегия и методический гид ОГЭ 2026/2027
   ========================================================================== */
.tab-guide-btn {
  background: linear-gradient(135deg, rgba(35, 134, 54, 0.15), rgba(56, 139, 253, 0.15)) !important;
  border-color: rgba(46, 160, 67, 0.4) !important;
  color: var(--accent-green) !important;
}
.tab-guide-btn:hover, .tab-guide-btn.active {
  background: var(--accent-green) !important;
  color: white !important;
  border-color: var(--accent-green) !important;
}

.guide-hero-banner {
  background: linear-gradient(135deg, rgba(35, 134, 54, 0.12) 0%, rgba(56, 139, 253, 0.12) 100%);
  border: 1px solid rgba(46, 160, 67, 0.35);
  border-radius: var(--radius-lg);
  padding: 2rem;
  margin-bottom: 2rem;
  box-shadow: 0 4px 25px rgba(0, 0, 0, 0.15);
}

.guide-hero-badge {
  display: inline-block;
  padding: 0.3rem 0.8rem;
  border-radius: var(--radius-full);
  background: rgba(46, 160, 67, 0.2);
  color: var(--accent-green);
  border: 1px solid rgba(46, 160, 67, 0.4);
  font-size: 0.78rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 0.75rem;
}

.guide-hero-title {
  font-size: 1.6rem;
  font-weight: 900;
  margin-bottom: 0.6rem;
  color: var(--text-primary);
}

.guide-hero-desc {
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.6;
  max-width: 850px;
  margin-bottom: 1.5rem;
}

.guide-subtabs {
  display: flex;
  gap: 0.6rem;
  flex-wrap: wrap;
}

.guide-subtab-btn {
  padding: 0.55rem 1.1rem;
  border-radius: var(--radius-full);
  font-size: 0.88rem;
  font-weight: 700;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  color: var(--text-secondary);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.guide-subtab-btn:hover {
  background: var(--bg-tertiary);
  color: var(--text-primary);
  border-color: var(--accent-blue);
}

.guide-subtab-btn.active {
  background: var(--accent-blue);
  color: white;
  border-color: var(--accent-blue);
  box-shadow: 0 3px 12px rgba(37, 99, 235, 0.35);
}

/* Карточки планов подготовки */
.guide-cards-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 1.5rem;
}

.guide-plan-card {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  box-shadow: 0 4px 18px rgba(0, 0, 0, 0.12);
  transition: transform var(--transition-fast);
}

.guide-plan-card:hover {
  transform: translateY(-3px);
  border-color: var(--accent-blue);
}

.guide-plan-header {
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 1rem;
  margin-bottom: 1.25rem;
}

.guide-plan-badge {
  display: inline-block;
  padding: 0.2rem 0.6rem;
  border-radius: var(--radius-full);
  background: rgba(56, 139, 253, 0.15);
  color: var(--accent-blue);
  font-size: 0.72rem;
  font-weight: 800;
  text-transform: uppercase;
  margin-bottom: 0.5rem;
}

.guide-plan-title {
  font-size: 1.25rem;
  font-weight: 800;
  margin-bottom: 0.3rem;
}

.guide-plan-tagline {
  font-size: 0.85rem;
  color: var(--text-muted);
}

.guide-plan-timeline {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.guide-timeline-step {
  position: relative;
  padding-left: 1.25rem;
  border-left: 2px solid rgba(56, 139, 253, 0.3);
}

.guide-step-period {
  font-size: 0.88rem;
  font-weight: 800;
  color: var(--accent-blue);
  margin-bottom: 0.4rem;
}

.guide-step-tasks {
  margin: 0;
  padding-left: 1.1rem;
  font-size: 0.85rem;
  color: var(--text-secondary);
  line-height: 1.5;
}

/* Блок бланков и правил */
.guide-section-box {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 1.75rem;
  margin-bottom: 1.5rem;
}

.guide-box-title {
  font-size: 1.35rem;
  font-weight: 900;
  margin-bottom: 0.5rem;
}

.guide-box-desc {
  font-size: 0.92rem;
  color: var(--text-secondary);
  line-height: 1.55;
  margin-bottom: 1.5rem;
  max-width: 900px;
}

.guide-blanks-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1rem;
  margin-bottom: 1.5rem;
}

.guide-blank-rule-card {
  background: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 1.25rem;
  display: flex;
  gap: 1rem;
  align-items: flex-start;
}

.blank-rule-icon {
  font-size: 1.8rem;
  line-height: 1;
  flex-shrink: 0;
}

.blank-rule-title {
  font-size: 0.95rem;
  font-weight: 800;
  margin-bottom: 0.35rem;
}

.blank-rule-desc {
  font-size: 0.85rem;
  color: var(--text-secondary);
  line-height: 1.5;
  margin: 0;
}

.guide-sample-box {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 1.25rem;
}

.guide-symbols-row {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 0.85rem;
}

.guide-symbol-cell {
  display: flex;
  align-items: center;
  gap: 0.85rem;
  background: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  padding: 0.75rem;
}

.symbol-char {
  font-family: 'JetBrains Mono', monospace;
  font-size: 2rem;
  font-weight: 900;
  width: 48px;
  height: 54px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: #ffffff;
  color: #000000;
  border: 2px solid #000000;
  border-radius: 4px;
  flex-shrink: 0;
}

.symbol-note {
  font-size: 0.78rem;
  color: var(--text-secondary);
  line-height: 1.35;
}

/* Таблицы тайминга */
.guide-timing-card {
  background: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 1.25rem;
  margin-bottom: 1.25rem;
}

.guide-timing-title {
  font-size: 1.15rem;
  font-weight: 800;
  margin-bottom: 1rem;
  color: var(--accent-blue);
}

.guide-timing-table {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.timing-row {
  display: grid;
  grid-template-columns: 180px 220px 1fr;
  gap: 1rem;
  padding: 0.65rem 0.85rem;
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  font-size: 0.86rem;
  align-items: center;
}

.timing-time {
  font-family: 'JetBrains Mono', monospace;
  font-weight: 700;
  color: var(--accent-blue);
}

.timing-phase {
  font-weight: 700;
  color: var(--text-primary);
}

.timing-action {
  color: var(--text-secondary);
}

/* Карточки ошибок */
.guide-mistakes-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1rem;
}

.guide-mistake-card {
  background: var(--bg-tertiary);
  border: 1px solid rgba(248, 81, 73, 0.25);
  border-radius: var(--radius-md);
  padding: 1.25rem;
  transition: transform var(--transition-fast);
}

.guide-mistake-card:hover {
  transform: translateY(-2px);
  border-color: rgba(248, 81, 73, 0.6);
}

.guide-mistake-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 0.5rem;
}

.mistake-num {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.85rem;
  font-weight: 900;
  color: #f87171;
  background: rgba(248, 81, 73, 0.15);
  padding: 0.15rem 0.5rem;
  border-radius: var(--radius-sm);
}

.mistake-category {
  font-size: 0.75rem;
  color: var(--text-muted);
  font-weight: 700;
  text-transform: uppercase;
}

.mistake-title {
  font-size: 0.98rem;
  font-weight: 800;
  margin-bottom: 0.4rem;
  color: var(--text-primary);
}

.mistake-desc {
  font-size: 0.85rem;
  color: var(--text-secondary);
  line-height: 1.5;
  margin: 0;
}

/* Карточки апелляции */
.guide-appeals-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 1.25rem;
}

.guide-appeal-card {
  background: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
}

.guide-appeal-badge {
  align-self: flex-start;
  padding: 0.25rem 0.65rem;
  border-radius: var(--radius-full);
  background: rgba(210, 153, 34, 0.18);
  color: var(--accent-yellow);
  border: 1px solid rgba(210, 153, 34, 0.4);
  font-size: 0.75rem;
  font-weight: 800;
  margin-bottom: 0.75rem;
}

.guide-appeal-title {
  font-size: 1.2rem;
  font-weight: 800;
  margin-bottom: 0.5rem;
}

.guide-appeal-timing {
  font-size: 0.88rem;
  color: var(--text-muted);
  background: var(--bg-card);
  padding: 0.4rem 0.75rem;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-color);
}

.appeal-consequence-box {
  margin-top: 1rem;
  padding: 0.75rem;
  background: rgba(46, 160, 67, 0.12);
  border: 1px solid rgba(46, 160, 67, 0.3);
  border-radius: var(--radius-sm);
  font-size: 0.85rem;
  color: var(--text-secondary);
}

.appeal-risks-box {
  margin-top: 1rem;
  padding: 0.75rem;
  background: rgba(248, 81, 73, 0.12);
  border: 1px solid rgba(248, 81, 73, 0.3);
  border-radius: var(--radius-sm);
  font-size: 0.85rem;
  color: #fca5a5;
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

@media (max-width: 768px) {
  .guide-subtabs {
    overflow-x: auto;
    flex-wrap: nowrap;
    padding-bottom: 0.4rem;
    scrollbar-width: none;
  }
  .guide-subtabs::-webkit-scrollbar {
    display: none;
  }
  .guide-subtab-btn {
    flex-shrink: 0;
    font-size: 0.8rem;
    padding: 0.45rem 0.85rem;
  }
  .timing-row {
    grid-template-columns: 1fr;
    gap: 0.35rem;
  }
  .guide-hero-banner {
    padding: 1.25rem;
  }
}

/* ==========================================================================
   Кнопки КИМов и Умскул
   ========================================================================== */
.btn-kim-action {
  background: rgba(56, 139, 253, 0.15) !important;
  border-color: rgba(56, 139, 253, 0.4) !important;
  color: var(--accent-blue) !important;
  font-weight: 700 !important;
}
.btn-kim-action:hover {
  background: var(--accent-blue) !important;
  color: white !important;
  transform: translateY(-2px);
  box-shadow: 0 4px 14px rgba(56, 139, 253, 0.35);
}

.btn-umschool-action {
  background: rgba(56, 189, 248, 0.08) !important;
  border: 1px solid rgba(56, 189, 248, 0.3) !important;
  color: #38bdf8 !important;
  font-weight: 600 !important;
  box-shadow: none !important;
}
.btn-umschool-action:hover {
  background: rgba(56, 189, 248, 0.16) !important;
  border-color: rgba(56, 189, 248, 0.5) !important;
  transform: translateY(-2px);
  box-shadow: 0 4px 14px rgba(56, 189, 248, 0.2) !important;
}

/* ==========================================================================
   Модальное окно: КИМы ФИПИ и цены
   ========================================================================== */
.kim-modal-card {
  max-width: 800px;
}

.kim-modal-badge {
  display: inline-block;
  padding: 0.25rem 0.65rem;
  border-radius: var(--radius-full);
  background: rgba(56, 139, 253, 0.18);
  color: var(--accent-blue);
  font-size: 0.75rem;
  font-weight: 800;
  text-transform: uppercase;
  margin-bottom: 0.5rem;
}

.kim-editions-list {
  display: flex;
  flex-direction: column;
  gap: 0.85rem;
  margin-bottom: 1.5rem;
}

.kim-edition-card {
  background: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 1.15rem;
  transition: transform var(--transition-fast);
}
.kim-edition-card:hover {
  border-color: var(--accent-blue);
}

.kim-edition-top {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 0.4rem;
}

.kim-edition-format {
  font-size: 0.8rem;
  font-weight: 800;
  color: var(--accent-blue);
  background: rgba(56, 139, 253, 0.15);
  padding: 0.2rem 0.55rem;
  border-radius: var(--radius-sm);
}

.kim-edition-price {
  font-family: 'JetBrains Mono', monospace;
  font-size: 1.15rem;
  font-weight: 800;
  color: var(--accent-green);
}

.kim-edition-title {
  font-size: 1.05rem;
  font-weight: 800;
  margin-bottom: 0.35rem;
  color: var(--text-primary);
}

.kim-edition-desc {
  font-size: 0.85rem;
  color: var(--text-secondary);
  line-height: 1.45;
  margin-bottom: 0.6rem;
}

.kim-edition-meta {
  display: flex;
  gap: 1.2rem;
  font-size: 0.78rem;
  color: var(--text-muted);
  flex-wrap: wrap;
}

.kim-modal-footer-buy {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 1.25rem;
}

.kim-buy-buttons-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(170px, 1fr));
  gap: 0.6rem;
}

.kim-btn-wb, .kim-btn-ozon, .kim-btn-market, .kim-btn-chitai {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.65rem 0.9rem;
  border-radius: var(--radius-md);
  font-size: 0.84rem;
  font-weight: 700;
  text-decoration: none !important;
  color: #ffffff !important;
  transition: all var(--transition-fast);
}

.kim-btn-wb {
  background: #cb11ab;
  box-shadow: 0 4px 12px rgba(203, 17, 171, 0.3);
}
.kim-btn-wb:hover {
  background: #b50f98;
  transform: translateY(-2px);
}

.kim-btn-ozon {
  background: #005bff;
  box-shadow: 0 4px 12px rgba(0, 91, 255, 0.3);
}
.kim-btn-ozon:hover {
  background: #004ecc;
  transform: translateY(-2px);
}

.kim-btn-market {
  background: #e63920;
  box-shadow: 0 4px 12px rgba(230, 57, 32, 0.3);
}
.kim-btn-market:hover {
  background: #cc3019;
  transform: translateY(-2px);
}

.kim-btn-chitai {
  background: #00a86b;
  box-shadow: 0 4px 12px rgba(0, 168, 107, 0.3);
}
.kim-btn-chitai:hover {
  background: #008f5b;
  transform: translateY(-2px);
}

/* ==========================================================================
   Модальное окно: Пробник от онлайн-школы «Умскул»
   ========================================================================== */
.umschool-modal-card {
  max-width: 850px;
  border-top: 3px solid #38bdf8;
}

.umschool-brand-badge {
  display: inline-block;
  padding: 0.25rem 0.75rem;
  border-radius: var(--radius-full);
  background: rgba(56, 189, 248, 0.1);
  color: #38bdf8;
  border: 1px solid rgba(56, 189, 248, 0.25);
  font-size: 0.76rem;
  font-weight: 800;
  text-transform: uppercase;
  margin-bottom: 0.5rem;
}

.umschool-teacher-row {
  display: flex;
  align-items: center;
  gap: 0.85rem;
  margin: 0.75rem 0;
}

.umschool-teacher-avatar {
  font-size: 2rem;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: rgba(56, 189, 248, 0.1);
  border: 1px solid rgba(56, 189, 248, 0.25);
  display: flex;
  align-items: center;
  justify-content: center;
}

.umschool-teacher-name {
  font-size: 1.1rem;
  font-weight: 800;
  color: var(--text-primary);
}

.umschool-teacher-role {
  font-size: 0.8rem;
  color: #38bdf8;
}

.umschool-quote-box {
  padding: 0.75rem 1rem;
  background: rgba(56, 189, 248, 0.06);
  border-left: 3px solid #38bdf8;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  font-size: 0.88rem;
  font-style: italic;
  color: var(--text-secondary);
  margin-bottom: 1.25rem;
}

.umschool-tasks-list {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.umschool-task-item {
  background: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 1.25rem;
}

.umschool-task-top {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 0.65rem;
}

.btn-umschool-reveal {
  font-size: 0.82rem !important;
  background: rgba(56, 189, 248, 0.1) !important;
  border-color: rgba(56, 189, 248, 0.3) !important;
  color: #38bdf8 !important;
  font-weight: 700 !important;
}
.btn-umschool-reveal:hover {
  background: #38bdf8 !important;
  color: #0f172a !important;
}

.umschool-solution-box {
  margin-top: 0.85rem;
  padding: 1rem;
  background: var(--bg-card);
  border: 1px solid rgba(56, 189, 248, 0.25);
  border-radius: var(--radius-md);
  animation: fadeIn 0.25s ease;
}

.umschool-tip-pill {
  margin-top: 0.75rem;
  padding: 0.65rem 0.85rem;
  background: rgba(210, 153, 34, 0.12);
  border: 1px solid rgba(210, 153, 34, 0.35);
  border-radius: var(--radius-sm);
  font-size: 0.84rem;
  color: var(--accent-yellow);
}

.umschool-modal-footer {
  margin-top: 1.5rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.umschool-official-link {
  background: linear-gradient(135deg, #7c3aed, #4f46e5) !important;
  color: white !important;
  text-decoration: none !important;
  font-size: 0.86rem;
  font-weight: 700;
  border: none !important;
}

/* ==========================================================================
   Раздел: Где купить КИМы (Маркетплейсы и розница НСО)
   ========================================================================== */
.tab-store-btn {
  border: 1px dashed var(--accent-blue) !important;
}

.store-hero-banner {
  background: linear-gradient(135deg, rgba(203, 17, 171, 0.1) 0%, rgba(0, 91, 255, 0.1) 50%, rgba(210, 153, 34, 0.1) 100%);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 2rem;
  margin-bottom: 1.5rem;
  text-align: center;
}

.store-badge-tag {
  display: inline-block;
  padding: 0.3rem 0.85rem;
  border-radius: var(--radius-full);
  background: rgba(56, 139, 253, 0.2);
  color: var(--accent-blue);
  font-size: 0.78rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 0.85rem;
}

.store-hero-title {
  font-size: 1.8rem;
  font-weight: 900;
  margin-bottom: 0.65rem;
  color: var(--text-primary);
}

.store-hero-subtitle {
  font-size: 0.96rem;
  color: var(--text-secondary);
  line-height: 1.55;
  max-width: 850px;
  margin: 0 auto;
}

.store-subject-selector-card {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  margin-bottom: 1.75rem;
  box-shadow: var(--shadow-sm);
}

.store-selected-kim-box {
  background: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 1.25rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
  flex-wrap: wrap;
}

.store-kim-left {
  display: flex;
  align-items: center;
  gap: 1.2rem;
  flex: 1;
  min-width: 280px;
}

.kim-icon-big {
  font-size: 3rem;
  line-height: 1;
  flex-shrink: 0;
}

.store-kim-buy-actions {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  min-width: 220px;
}

.store-section-box {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 1.75rem;
  margin-bottom: 1.75rem;
}

.store-section-title {
  font-size: 1.35rem;
  font-weight: 900;
  margin-bottom: 0.4rem;
  color: var(--text-primary);
}

.store-section-desc {
  font-size: 0.9rem;
  color: var(--text-secondary);
  margin-bottom: 1.25rem;
}

/* Сетка маркетплейсов */
.marketplaces-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 1.25rem;
}

.marketplace-card {
  background: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 1.25rem;
  display: flex;
  flex-direction: column;
  transition: transform var(--transition-fast);
}
.marketplace-card:hover {
  transform: translateY(-3px);
}

.mp-header {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 0.75rem;
}

.mp-icon {
  font-size: 1.75rem;
}

.mp-title {
  font-size: 1.15rem;
  font-weight: 800;
  margin-bottom: 0.15rem;
}

.mp-badge {
  font-size: 0.72rem;
  color: var(--accent-blue);
  font-weight: 700;
}

.mp-desc {
  font-size: 0.85rem;
  color: var(--text-secondary);
  line-height: 1.45;
  margin-bottom: 0.85rem;
}

.mp-price-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.85rem;
  color: var(--text-muted);
  background: var(--bg-card);
  padding: 0.5rem 0.75rem;
  border-radius: var(--radius-sm);
  margin-bottom: 0.85rem;
}

.mp-perks-list {
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
  margin-bottom: 1rem;
}

.mp-perk-tag {
  font-size: 0.78rem;
  color: var(--accent-green);
  font-weight: 600;
}

/* Магазины Новосибирской области */
.nso-stores-list {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.nso-store-card {
  background: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 1.4rem;
  position: relative;
}

.nso-store-card.recommended-store {
  border-color: rgba(46, 160, 67, 0.4);
  background: linear-gradient(135deg, rgba(46, 160, 67, 0.05), rgba(56, 139, 253, 0.03));
}

.nso-store-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 1rem;
  margin-bottom: 0.75rem;
  flex-wrap: wrap;
}

.store-rec-badge {
  display: inline-block;
  padding: 0.2rem 0.6rem;
  border-radius: var(--radius-full);
  background: rgba(46, 160, 67, 0.2);
  color: var(--accent-green);
  font-size: 0.72rem;
  font-weight: 800;
  text-transform: uppercase;
  margin-bottom: 0.4rem;
}

.nso-store-name {
  font-size: 1.2rem;
  font-weight: 800;
  margin-bottom: 0.25rem;
}

.nso-store-address {
  font-size: 0.88rem;
  color: var(--text-muted);
}

.nso-store-phone {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--accent-blue);
}

.nso-filials-box {
  background: var(--bg-card);
  padding: 0.75rem 1rem;
  border-radius: var(--radius-sm);
  font-size: 0.84rem;
  color: var(--text-secondary);
  margin-bottom: 0.85rem;
}
.nso-filials-box ul {
  margin: 0.35rem 0 0 1.2rem;
}

.nso-store-desc {
  font-size: 0.88rem;
  color: var(--text-secondary);
  line-height: 1.5;
  margin-bottom: 1rem;
}

.nso-store-tags {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
  margin-bottom: 1rem;
}

.store-tag {
  font-size: 0.76rem;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  padding: 0.25rem 0.55rem;
  border-radius: var(--radius-sm);
  color: var(--text-muted);
}

/* Пункты выдачи (ПВЗ) */
.local-pickup-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 1.25rem;
}

.local-pickup-group-card {
  background: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 1.25rem;
}

.pickup-group-header {
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 0.75rem;
  margin-bottom: 1rem;
}

.pickup-items-list {
  display: flex;
  flex-direction: column;
  gap: 0.85rem;
}

.pickup-point-row {
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  padding: 0.75rem;
}

.point-network-badge {
  font-size: 0.7rem;
  font-weight: 800;
  padding: 0.2rem 0.5rem;
  border-radius: var(--radius-sm);
  color: white;
  flex-shrink: 0;
}
.point-network-badge.net-wildberries {
  background: #cb11ab;
}
.point-network-badge.net-ozon {
  background: #005bff;
}
.point-network-badge.net-яндексмаркет {
  background: #e63920;
}

.point-address {
  font-size: 0.88rem;
  color: var(--text-primary);
  margin-bottom: 0.2rem;
}

.point-meta {
  font-size: 0.78rem;
  color: var(--text-muted);
}

/* Точки индикаторы квиза */
.quiz-step-dot {
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  font-size: 0.72rem;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-muted);
}
.quiz-step-dot.active {
  background: var(--accent-blue);
  color: white;
  border-color: var(--accent-blue);
}
.quiz-step-dot.done {
  background: rgba(46, 160, 67, 0.2);
  color: var(--accent-green);
  border-color: rgba(46, 160, 67, 0.4);
}

/* ==========================================================================
   Раздел: Пробники и демо-версии (ФИПИ 4ЕГЭ, Умскул, Задачи с. Прокудское)
   ========================================================================== */
.demos-view-container {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
  width: 100%;
}

.demos-hero-header {
  background: linear-gradient(135deg, rgba(37, 99, 235, 0.12) 0%, rgba(124, 58, 237, 0.15) 100%);
  border: 1px solid rgba(56, 139, 253, 0.28);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  box-shadow: var(--shadow-sm);
  position: relative;
  overflow: hidden;
}

.demos-hero-header::before {
  content: "";
  position: absolute;
  top: -40px;
  right: -40px;
  width: 160px;
  height: 160px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(124, 58, 237, 0.25) 0%, transparent 70%);
  pointer-events: none;
}

.demos-hero-badges-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
  margin-bottom: 0.75rem;
}

.demos-badge-pill {
  font-size: 0.75rem;
  font-weight: 700;
  padding: 0.25rem 0.65rem;
  border-radius: var(--radius-full);
  background: var(--bg-tertiary);
  color: var(--text-secondary);
  border: 1px solid var(--border-color);
  letter-spacing: 0.02em;
}

.demos-badge-pill.official-pill {
  background: rgba(56, 189, 248, 0.1);
  color: #38bdf8;
  border-color: rgba(56, 189, 248, 0.25);
}

.demos-badge-pill.umschool-pill,
.demos-badge-pill.local-pill {
  background: rgba(255, 255, 255, 0.05);
  color: var(--text-secondary);
  border-color: rgba(255, 255, 255, 0.1);
}

.demos-hero-title {
  font-size: 1.6rem;
  font-weight: 800;
  color: var(--text-primary);
  margin-bottom: 0.5rem;
  display: flex;
  align-items: center;
  gap: 0.6rem;
  flex-wrap: wrap;
}

.demos-hero-subtitle {
  font-size: 0.92rem;
  line-height: 1.5;
  color: var(--text-secondary);
  max-width: 800px;
  margin-bottom: 1.25rem;
}

.demos-stats-bar {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
  padding-top: 1rem;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
}

.demos-stat-box {
  display: flex;
  flex-direction: column;
  padding: 0.4rem 0.9rem;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
}

.demos-stat-box .stat-num {
  font-size: 1.2rem;
  font-weight: 800;
  color: var(--accent-blue);
  line-height: 1.1;
}

.demos-stat-box .stat-lbl {
  font-size: 0.72rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  font-weight: 600;
}

.demos-stat-action {
  margin-left: auto;
}

.demos-source-btn {
  background: var(--accent-blue) !important;
  color: #ffffff !important;
  border: 1px solid var(--accent-blue) !important;
  font-weight: 700 !important;
  padding: 0.55rem 1.1rem !important;
  box-shadow: 0 4px 12px rgba(37, 99, 235, 0.35);
}

.demos-source-btn:hover {
  background: #1d4ed8 !important;
  transform: translateY(-1px);
}

/* Навигатор по подвкладкам демоверсий */
.demos-subtabs-nav {
  display: flex;
  gap: 0.6rem;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: none;
  padding: 0.2rem 0;
  border-bottom: 1px solid var(--border-color);
  margin-bottom: 0.5rem;
}

.demos-subtabs-nav::-webkit-scrollbar {
  display: none;
}

.demos-subtab-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.65rem 1.25rem;
  font-size: 0.92rem;
  font-weight: 700;
  color: var(--text-secondary);
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-full);
  cursor: pointer;
  white-space: nowrap;
  transition: all var(--transition-fast);
  flex-shrink: 0;
}

.demos-subtab-btn:hover {
  color: var(--text-primary);
  border-color: var(--accent-blue);
  background: var(--bg-tertiary);
}

.demos-subtab-btn.active,
.demos-subtab-btn.subtab-umschool.active,
.demos-subtab-btn.subtab-prokudskoe.active {
  background: rgba(56, 189, 248, 0.15);
  color: #38bdf8;
  border-color: rgba(56, 189, 248, 0.4);
  box-shadow: 0 0 14px rgba(56, 189, 248, 0.12);
}

/* Панель фильтрации заданий (Все, Часть 1, Часть 2) */
.demos-filter-toolbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.75rem;
  padding: 0.75rem 1rem;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  margin-bottom: 1rem;
}

.demos-part-pills {
  display: flex;
  gap: 0.4rem;
  flex-wrap: wrap;
}

.demos-part-pill {
  padding: 0.35rem 0.75rem;
  font-size: 0.82rem;
  font-weight: 600;
  border-radius: var(--radius-full);
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  color: var(--text-secondary);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.demos-part-pill:hover {
  color: var(--text-primary);
  border-color: var(--accent-blue);
}

.demos-part-pill.active {
  background: rgba(37, 99, 235, 0.2);
  color: var(--accent-blue);
  border-color: var(--accent-blue);
  font-weight: 700;
}

/* Карточки заданий полной демоверсии */
.demo-task-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 1.25rem;
  margin-bottom: 1rem;
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.demo-task-card:hover {
  border-color: rgba(56, 139, 253, 0.4);
  box-shadow: var(--shadow-sm);
}

.demo-task-card.part-2 {
  border-left: 3px solid rgba(56, 189, 248, 0.4);
}

.demo-task-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 0.85rem;
  padding-bottom: 0.6rem;
  border-bottom: 1px solid var(--border-color);
}

.demo-task-meta-left {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  flex-wrap: wrap;
}

.demo-task-num-badge {
  font-size: 0.85rem;
  font-weight: 800;
  padding: 0.25rem 0.65rem;
  border-radius: var(--radius-sm);
  background: var(--accent-blue);
  color: white;
}

.demo-task-part-badge {
  font-size: 0.75rem;
  font-weight: 700;
  padding: 0.2rem 0.5rem;
  border-radius: var(--radius-sm);
  background: var(--bg-tertiary);
  color: var(--text-secondary);
  border: 1px solid var(--border-color);
}

.demo-task-part-badge.part2 {
  background: rgba(139, 92, 246, 0.15);
  color: #a78bfa;
  border-color: rgba(139, 92, 246, 0.35);
}

.demo-task-topic {
  font-size: 0.88rem;
  font-weight: 700;
  color: var(--text-primary);
}

.demo-task-question {
  font-size: 0.94rem;
  line-height: 1.6;
  color: var(--text-primary);
  margin-bottom: 1rem;
  white-space: pre-line;
}

/* Интерактивная строка ввода ответа */
.demo-task-interactive {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 0.75rem 1rem;
  margin-bottom: 0.85rem;
  display: flex;
  align-items: center;
  gap: 0.75rem;
  flex-wrap: wrap;
}

.demo-answer-input {
  flex: 1;
  min-width: 160px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  color: var(--text-primary);
  padding: 0.5rem 0.75rem;
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  font-family: inherit;
  transition: border-color var(--transition-fast);
}

.demo-answer-input:focus {
  outline: none;
  border-color: var(--accent-blue);
}

.demo-check-btn {
  padding: 0.5rem 1rem;
  font-size: 0.85rem;
  font-weight: 700;
  background: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  color: var(--text-primary);
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.demo-check-btn:hover {
  background: var(--accent-blue);
  color: white;
  border-color: var(--accent-blue);
}

.demo-feedback-text {
  width: 100%;
  font-size: 0.84rem;
  margin-top: 0.3rem;
  display: none;
}

/* Блок решения */
.demo-task-actions {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  margin-top: 0.5rem;
}

.demo-reveal-btn {
  font-size: 0.84rem !important;
  padding: 0.45rem 0.95rem !important;
  background: var(--bg-secondary) !important;
  border: 1px solid var(--border-color) !important;
  color: var(--text-primary) !important;
}

.demo-reveal-btn:hover {
  background: var(--bg-tertiary) !important;
  border-color: var(--accent-blue) !important;
}

.demo-task-solution-box {
  margin-top: 0.85rem;
  padding: 1rem 1.15rem;
  background: var(--bg-secondary);
  border-left: 4px solid var(--accent-green);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  display: none;
  animation: fadeIn 0.2s ease;
}

.demo-solution-answer-tag {
  font-size: 0.92rem;
  font-weight: 700;
  color: var(--accent-green);
  margin-bottom: 0.5rem;
}

.demo-solution-answer-tag code {
  background: var(--bg-tertiary);
  padding: 0.15rem 0.5rem;
  border-radius: 4px;
  color: var(--text-primary);
  border: 1px solid var(--border-color);
}

.demo-solution-body {
  font-size: 0.88rem;
  line-height: 1.6;
  color: var(--text-secondary);
  white-space: pre-line;
}

/* Краеведческий блок: Село Прокудское */
.prokudskoe-hero-card {
  background: linear-gradient(135deg, rgba(16, 185, 129, 0.12) 0%, rgba(6, 182, 212, 0.12) 100%);
  border: 1px solid rgba(16, 185, 129, 0.35);
  border-radius: var(--radius-lg);
  padding: 1.4rem;
  margin-bottom: 1.25rem;
}

.prokudskoe-hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.78rem;
  font-weight: 800;
  color: #34d399;
  background: rgba(16, 185, 129, 0.2);
  border: 1px solid rgba(16, 185, 129, 0.4);
  padding: 0.25rem 0.65rem;
  border-radius: var(--radius-full);
  margin-bottom: 0.6rem;
}

.prokudskoe-hero-title {
  font-size: 1.35rem;
  font-weight: 800;
  color: var(--text-primary);
  margin-bottom: 0.4rem;
}

.prokudskoe-hero-desc {
  font-size: 0.88rem;
  line-height: 1.5;
  color: var(--text-secondary);
  margin-bottom: 1rem;
}

.prokudskoe-meta-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 0.6rem;
}

.prokudskoe-meta-item {
  font-size: 0.8rem;
  color: var(--text-secondary);
  background: var(--bg-card);
  padding: 0.45rem 0.75rem;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-color);
}

.prokudskoe-meta-item strong {
  color: var(--text-primary);
}

.prokudskoe-task-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  font-size: 0.75rem;
  font-weight: 700;
  padding: 0.2rem 0.55rem;
  border-radius: var(--radius-full);
  background: rgba(16, 185, 129, 0.18);
  color: #34d399;
  border: 1px solid rgba(16, 185, 129, 0.4);
}

.prokudskoe-location-line {
  font-size: 0.82rem;
  font-weight: 700;
  color: #60a5fa;
  margin-top: 0.25rem;
}

.prokudskoe-scheme-wrapper {
  margin: 1.25rem 0;
  text-align: center;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 1rem;
}

@media (max-width: 768px) {
  .demos-hero-header {
    padding: 1.1rem 0.9rem;
  }
  .demos-hero-title {
    font-size: 1.25rem;
  }
  .demos-stats-bar {
    gap: 0.5rem;
  }
  .demos-stat-box {
    padding: 0.3rem 0.6rem;
  }
  .demos-stat-action {
    width: 100%;
    margin-left: 0;
    margin-top: 0.5rem;
  }
  .demos-source-btn {
    width: 100%;
    text-align: center;
    justify-content: center;
  }
  .demos-subtab-btn {
    font-size: 0.8rem;
    padding: 0.5rem 0.85rem;
  }
  .demo-task-card {
    padding: 1rem 0.85rem;
  }
  .demo-task-interactive {
    flex-direction: column;
    align-items: stretch;
  }
  .demo-check-btn {
    width: 100%;
  }
}

/* ==========================================================================
   Раздел: Все темы ОГЭ ФИПИ (Каталог всех тем, поиск и трекер по 11 предметам)
   ========================================================================== */

.topics-view-container {
  max-width: 1180px;
  margin: 0 auto;
  padding-bottom: 2.5rem;
}

/* Верхний баннер каталога тем */
.tracker-hero {
  background: linear-gradient(135deg, rgba(56, 139, 253, 0.12) 0%, rgba(163, 113, 247, 0.12) 50%, rgba(46, 160, 67, 0.08) 100%);
  border: 1px solid rgba(56, 139, 253, 0.35);
  border-radius: var(--radius-lg);
  padding: 1.8rem;
  margin-bottom: 1.5rem;
  box-shadow: 0 6px 28px rgba(0, 0, 0, 0.2);
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1.5rem;
  position: relative;
  overflow: hidden;
}

.topics-hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  font-size: 0.76rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  padding: 0.25rem 0.75rem;
  border-radius: var(--radius-full);
  background: rgba(56, 139, 253, 0.2);
  color: var(--accent-blue);
  border: 1px solid rgba(56, 139, 253, 0.35);
  margin-bottom: 0.75rem;
  flex-wrap: wrap;
}

.topics-hero-tag {
  background: rgba(46, 160, 67, 0.25);
  color: #3fb950;
  padding: 0.15rem 0.5rem;
  border-radius: var(--radius-full);
  border: 1px solid rgba(46, 160, 67, 0.4);
}

.topics-hero-title {
  font-size: 1.7rem;
  font-weight: 900;
  line-height: 1.25;
  color: var(--text-primary);
  margin-bottom: 0.5rem;
}

.topics-hero-desc {
  font-size: 0.94rem;
  color: var(--text-secondary);
  line-height: 1.55;
  max-width: 750px;
  margin-bottom: 0.5rem;
}

.topics-doc-source {
  margin-top: 0.65rem;
  font-size: 0.82rem;
  color: var(--text-muted);
  font-weight: 600;
}

/* Статистическая плашка прогресса */
.tracker-stats-group {
  display: flex;
  align-items: center;
  gap: 1.25rem;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  padding: 1.1rem 1.4rem;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  flex-shrink: 0;
}

.tracker-circle-progress {
  font-size: 2.2rem;
  font-weight: 900;
  color: #3fb950;
  line-height: 1;
}

.tracker-stats-labels {
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
  font-size: 0.85rem;
  color: var(--text-secondary);
}

.tracker-stats-labels strong {
  font-size: 1.15rem;
  color: var(--text-primary);
}

.tracker-stats-sub {
  font-size: 0.76rem;
  color: var(--text-muted);
  margin-top: 0.15rem;
}

/* Быстрый скролл предметов в каталоге тем */
.topics-subject-selector {
  display: flex;
  align-items: center;
  gap: 0.45rem;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  padding: 0.3rem 0.2rem 0.75rem;
  margin-bottom: 1.25rem;
  scrollbar-width: thin;
}

.topics-subject-selector::-webkit-scrollbar {
  height: 4px;
}
.topics-subject-selector::-webkit-scrollbar-thumb {
  background: var(--border-color);
  border-radius: var(--radius-full);
}

.topics-selector-label {
  font-size: 0.85rem;
  font-weight: 800;
  color: var(--text-muted);
  flex-shrink: 0;
  margin-right: 0.25rem;
}

.topics-subj-btn,
.topics-subject-pill {
  flex-shrink: 0;
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  padding: 0.45rem 0.85rem;
  border-radius: var(--radius-full);
  font-size: 0.82rem;
  font-weight: 700;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  color: var(--text-secondary);
  cursor: pointer;
  transition: all var(--transition-fast);
  white-space: nowrap;
}

.topics-subj-btn:hover,
.topics-subject-pill:hover {
  background: var(--bg-tertiary);
  color: var(--text-primary);
  border-color: rgba(56, 139, 253, 0.45);
}

.topics-subj-btn.active,
.topics-subject-pill.active {
  background: var(--accent-blue);
  color: #ffffff;
  border-color: var(--accent-blue);
  box-shadow: 0 3px 12px rgba(37, 99, 235, 0.35);
}

/* Тулбар поиска и фильтрации тем */
.topics-toolbar {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 1.2rem;
  margin-bottom: 1.5rem;
  box-shadow: var(--shadow-sm);
}

.topics-search-box {
  position: relative;
  display: flex;
  align-items: center;
  margin-bottom: 1rem;
}

.topics-search-icon {
  position: absolute;
  left: 1rem;
  font-size: 1.15rem;
  color: var(--text-muted);
  pointer-events: none;
}

.topics-search-input {
  width: 100%;
  padding: 0.75rem 2.8rem 0.75rem 2.8rem;
  font-size: 0.95rem;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  color: var(--text-primary);
  transition: all var(--transition-fast);
  box-sizing: border-box;
}

.topics-search-input:focus {
  outline: none;
  border-color: var(--accent-blue);
  box-shadow: 0 0 0 3px rgba(56, 139, 253, 0.25);
}

.topics-clear-search-btn {
  position: absolute;
  right: 0.75rem;
  background: none;
  border: none;
  font-size: 1.1rem;
  color: var(--text-muted);
  cursor: pointer;
  padding: 0.25rem 0.5rem;
  border-radius: 50%;
  transition: color var(--transition-fast);
}

.topics-clear-search-btn:hover {
  color: var(--text-primary);
}

.topics-filter-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.8rem;
  flex-wrap: wrap;
}

.topics-filter-pills {
  display: flex;
  gap: 0.4rem;
  flex-wrap: wrap;
}

.topics-filter-btn {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  color: var(--text-secondary);
  font-size: 0.82rem;
  font-weight: 700;
  padding: 0.35rem 0.75rem;
  border-radius: var(--radius-full);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.topics-filter-btn:hover {
  background: var(--bg-tertiary);
  color: var(--text-primary);
}

.topics-filter-btn.active {
  background: rgba(56, 139, 253, 0.18);
  color: var(--accent-blue);
  border-color: rgba(56, 139, 253, 0.45);
}

.topics-actions-row {
  display: flex;
  gap: 0.4rem;
  flex-wrap: wrap;
}

.topics-tool-btn {
  font-size: 0.78rem !important;
  padding: 0.35rem 0.7rem !important;
  border-radius: var(--radius-md) !important;
}

.topics-tool-btn.reset-btn {
  color: var(--accent-orange) !important;
}
.topics-tool-btn.reset-btn:hover {
  border-color: var(--accent-orange) !important;
}

.topics-search-info {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-top: 0.85rem;
  padding: 0.5rem 0.85rem;
  border-radius: var(--radius-sm);
  background: rgba(56, 139, 253, 0.1);
  border: 1px solid rgba(56, 139, 253, 0.25);
  font-size: 0.82rem;
  color: var(--text-secondary);
  flex-wrap: wrap;
}

.topics-reset-inline {
  background: none;
  border: none;
  color: var(--accent-blue);
  font-size: 0.82rem;
  font-weight: 700;
  text-decoration: underline;
  cursor: pointer;
  padding: 0;
  margin-left: auto;
}

/* Карточка раздела тем (Аккордеон) */
.topic-section-card {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  margin-bottom: 1.25rem;
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: border-color var(--transition-fast);
}

.topic-section-card:hover {
  border-color: rgba(56, 139, 253, 0.35);
}

.topic-section-header {
  padding: 1.1rem 1.3rem;
  background: var(--bg-card);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  cursor: pointer;
  user-select: none;
  transition: background var(--transition-fast);
  border-bottom: 1px solid var(--border-color);
}

.topic-section-card.collapsed .topic-section-header {
  border-bottom: none;
}

.topic-section-header:hover {
  background: var(--bg-tertiary);
}

.topic-section-title-wrap {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  flex: 1;
  min-width: 0;
}

.topic-section-chevron {
  font-size: 0.8rem;
  color: var(--text-muted);
  width: 14px;
  display: inline-block;
  transition: transform var(--transition-fast);
}

.topic-section-name {
  font-size: 1.05rem;
  font-weight: 800;
  color: var(--text-primary);
  line-height: 1.3;
}

.topic-section-fipicode {
  font-size: 0.72rem;
  font-weight: 800;
  padding: 0.18rem 0.5rem;
  border-radius: var(--radius-full);
  background: rgba(56, 139, 253, 0.15);
  color: var(--accent-blue);
  border: 1px solid rgba(56, 139, 253, 0.3);
  white-space: nowrap;
}

.topic-section-meta {
  display: flex;
  align-items: center;
  gap: 0.6rem;
}

.topic-section-count {
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--text-secondary);
  white-space: nowrap;
}

.topic-section-body {
  padding: 1rem 1.25rem 1.25rem;
}

.topics-grid-list {
  display: flex;
  flex-direction: column;
  gap: 0.9rem;
}

/* Карточка отдельной темы */
.topic-card-item {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 1rem 1.15rem;
  transition: all var(--transition-fast);
  position: relative;
}

.topic-card-item:hover {
  border-color: rgba(56, 139, 253, 0.4);
  box-shadow: 0 4px 14px rgba(0, 0, 0, 0.18);
  transform: translateY(-1px);
}

.topic-card-item.completed {
  border-color: rgba(46, 160, 67, 0.4);
  background: linear-gradient(135deg, rgba(46, 160, 67, 0.05), var(--bg-card));
}

.topic-item-main {
  display: flex;
  align-items: flex-start;
  gap: 0.9rem;
}

/* Кастомный чекбокс */
.topic-checkbox-wrap {
  position: relative;
  display: inline-flex;
  align-items: center;
  cursor: pointer;
  user-select: none;
  margin-top: 0.2rem;
}

.topic-checkbox {
  position: absolute;
  opacity: 0;
  cursor: pointer;
  height: 0;
  width: 0;
}

.topic-checkmark {
  width: 20px;
  height: 20px;
  background-color: var(--bg-tertiary);
  border: 2px solid var(--border-color);
  border-radius: 6px;
  display: inline-block;
  transition: all var(--transition-fast);
  position: relative;
}

.topic-checkbox-wrap:hover .topic-checkmark {
  border-color: var(--accent-blue);
}

.topic-checkbox:checked ~ .topic-checkmark {
  background-color: #2ea043;
  border-color: #2ea043;
  box-shadow: 0 0 10px rgba(46, 160, 67, 0.4);
}

.topic-checkmark:after {
  content: "";
  position: absolute;
  display: none;
  left: 6px;
  top: 2px;
  width: 5px;
  height: 10px;
  border: solid white;
  border-width: 0 2px 2px 0;
  transform: rotate(45deg);
}

.topic-checkbox:checked ~ .topic-checkmark:after {
  display: block;
}

.topic-item-content {
  flex: 1;
  min-width: 0;
}

.topic-item-header {
  display: flex;
  align-items: baseline;
  gap: 0.55rem;
  margin-bottom: 0.5rem;
  flex-wrap: wrap;
}

.topic-fipi-tag {
  font-size: 0.72rem;
  font-weight: 800;
  font-family: var(--font-mono);
  color: var(--accent-blue);
  background: rgba(56, 139, 253, 0.12);
  padding: 0.12rem 0.45rem;
  border-radius: 4px;
}

.topic-title-text {
  font-size: 1rem;
  font-weight: 800;
  color: var(--text-primary);
  line-height: 1.35;
}

.topic-card-item.completed .topic-title-text {
  color: var(--text-secondary);
}

/* Бейджи темы */
.topic-badges-row {
  display: flex;
  align-items: center;
  gap: 0.45rem;
  flex-wrap: wrap;
  margin-bottom: 0.65rem;
}

.topic-task-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  font-size: 0.75rem;
  font-weight: 800;
  padding: 0.25rem 0.6rem;
  border-radius: var(--radius-full);
  background: rgba(56, 139, 253, 0.15);
  border: 1px solid rgba(56, 139, 253, 0.35);
  color: var(--accent-blue);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.topic-task-badge:hover {
  background: var(--accent-blue);
  color: #ffffff;
  transform: translateY(-1px);
  box-shadow: 0 2px 8px rgba(56, 139, 253, 0.3);
}

.task-badge-arrow {
  font-size: 0.8rem;
  transition: transform var(--transition-fast);
}
.topic-task-badge:hover .task-badge-arrow {
  transform: translateX(2px) translateY(-1px);
}

.topic-part-badge {
  font-size: 0.72rem;
  font-weight: 700;
  padding: 0.2rem 0.55rem;
  border-radius: var(--radius-full);
  background: var(--bg-tertiary);
  color: var(--text-secondary);
  border: 1px solid var(--border-color);
}

.topic-part-badge.part1 {
  background: rgba(35, 134, 54, 0.12);
  color: #3fb950;
  border-color: rgba(46, 160, 67, 0.3);
}

.topic-part-badge.part2 {
  background: rgba(163, 113, 247, 0.15);
  color: #d2a8ff;
  border-color: rgba(163, 113, 247, 0.35);
}

.topic-diff-badge {
  font-size: 0.72rem;
  font-weight: 700;
  padding: 0.2rem 0.55rem;
  border-radius: var(--radius-full);
}

.topic-diff-badge.Базовый {
  background: rgba(46, 160, 67, 0.15);
  color: #3fb950;
}

.topic-diff-badge.Повышенный {
  background: rgba(210, 153, 34, 0.15);
  color: var(--accent-yellow);
}

.topic-diff-badge.Высокий {
  background: rgba(248, 81, 73, 0.15);
  color: var(--accent-red);
}

/* Формулы и термины */
.topic-terms-row {
  display: flex;
  align-items: flex-start;
  gap: 0.5rem;
  flex-wrap: wrap;
  margin-top: 0.5rem;
}

.terms-label {
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--text-muted);
  line-height: 1.6;
}

.terms-pills {
  display: flex;
  gap: 0.35rem;
  flex-wrap: wrap;
}

.term-pill {
  display: inline-block;
  background: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  border-radius: 4px;
  padding: 0.1rem 0.45rem;
  font-size: 0.78rem;
  color: var(--text-primary);
}

.term-pill code {
  font-family: var(--font-mono);
  font-weight: 600;
  color: #58a6ff;
}

/* Совет от экспертов */
.topic-tip-box {
  margin-top: 0.65rem;
  background: rgba(210, 153, 34, 0.08);
  border: 1px solid rgba(210, 153, 34, 0.25);
  border-radius: var(--radius-sm);
  padding: 0.6rem 0.85rem;
  display: flex;
  align-items: flex-start;
  gap: 0.6rem;
  font-size: 0.84rem;
  line-height: 1.45;
  color: var(--text-secondary);
}

.tip-bulb {
  font-size: 1.1rem;
  line-height: 1;
  flex-shrink: 0;
  margin-top: 0.1rem;
}

.topic-tip-box strong {
  color: var(--accent-yellow);
  display: block;
  font-size: 0.78rem;
  margin-bottom: 0.15rem;
}

.topic-tip-box p {
  margin: 0;
  color: var(--text-secondary);
}

/* Подсветка поискового запроса */
.topic-highlight {
  background: rgba(234, 179, 8, 0.35);
  color: #fff;
  border-radius: 2px;
  padding: 0 2px;
  font-weight: 800;
}

/* Пустое состояние поиска */
.topics-empty-state {
  text-align: center;
  padding: 3rem 1.5rem;
  background: var(--bg-secondary);
  border: 1px dashed var(--border-color);
  border-radius: var(--radius-lg);
  color: var(--text-muted);
}
.topics-empty-state h3 {
  font-size: 1.25rem;
  color: var(--text-primary);
  margin-bottom: 0.4rem;
}
.topics-empty-state p {
  font-size: 0.9rem;
  max-width: 480px;
  margin: 0 auto;
}

/* Адаптивность для мобильных устройств */
@media (max-width: 768px) {
  .topics-hero-header {
    padding: 1.2rem 1rem;
  }
  .topics-hero-title {
    font-size: 1.3rem;
  }
  .topics-stats-bar {
    grid-template-columns: repeat(2, 1fr);
    gap: 0.5rem;
  }
  .topics-stat-card {
    padding: 0.6rem 0.75rem;
  }
  .topics-stat-num {
    font-size: 1.25rem;
  }
  .topics-toolbar {
    padding: 0.85rem;
  }
  .topics-filter-row {
    flex-direction: column;
    align-items: stretch;
  }
  .topics-actions-row {
    justify-content: flex-start;
  }
  .topic-section-header {
    padding: 0.85rem 0.95rem;
    flex-direction: column;
    align-items: flex-start;
    gap: 0.35rem;
  }
  .topic-section-body {
    padding: 0.75rem 0.75rem;
  }
  .topic-card-item {
    padding: 0.85rem;
  }
  .topic-item-main {
    gap: 0.65rem;
  }
}

/* Отступ при прокрутке к разделам под плавающую шапку сайта */
.view-tabs,
.main-wrapper,
#view-cheatsheet,
#view-demos,
#view-guide,
#view-quiz,
#view-calculator,
#view-tracker,
#view-store,
#view-school,
#view-mistakes,
#view-cabinet {
  scroll-margin-top: 85px;
}

/* ========================================================================
   СТИЛИ ДЛЯ АВТОРИЗАЦИИ, ПРОФИЛЯ, БАНКА ОШИБОК И ГЕЙМИФИКАЦИИ (Фичи 3, 4, 5)
   ======================================================================== */

/* Кнопка Личного кабинета и стрика в шапке */
.profile-header-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  background: linear-gradient(135deg, rgba(37, 99, 235, 0.12), rgba(124, 58, 237, 0.12));
  border: 1px solid rgba(59, 130, 246, 0.4);
  color: var(--text-primary);
  font-weight: 700;
  padding: 0.4rem 0.85rem;
  border-radius: 9999px;
  cursor: pointer;
  transition: all 0.2s ease;
}
.profile-header-btn:hover {
  transform: translateY(-1px);
  border-color: var(--accent-blue);
  box-shadow: 0 4px 12px rgba(37, 99, 235, 0.25);
}
.streak-badge-pill {
  background: linear-gradient(135deg, #f97316, #ef4444);
  color: white;
  font-size: 0.72rem;
  font-weight: 800;
  padding: 0.15rem 0.45rem;
  border-radius: 9999px;
  box-shadow: 0 0 8px rgba(239, 68, 68, 0.4);
  animation: flamePulse 2s infinite ease-in-out;
}
@keyframes flamePulse {
  0%, 100% { transform: scale(1); box-shadow: 0 0 8px rgba(239, 68, 68, 0.4); }
  50% { transform: scale(1.06); box-shadow: 0 0 14px rgba(249, 115, 22, 0.7); }
}

/* Бейдж на табах */
.tab-badge-count {
  background: var(--accent-red);
  color: white;
  font-size: 0.7rem;
  font-weight: 800;
  padding: 0.1rem 0.45rem;
  border-radius: 9999px;
  margin-left: 0.35rem;
}

/* Банк ошибок */
.mistakes-container {
  max-width: 900px;
  margin: 0 auto;
  padding: 1.5rem 0;
}
.mistakes-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 1.5rem;
  margin-bottom: 1.5rem;
  flex-wrap: wrap;
}
.mistakes-stats-card {
  display: flex;
  gap: 1.25rem;
  background: var(--bg-card);
  padding: 1rem 1.4rem;
  border-radius: 12px;
  border: 1px solid var(--border-color);
}
.mstat-item {
  display: flex;
  flex-direction: column;
  align-items: center;
}
.mstat-val {
  font-size: 1.75rem;
  font-weight: 800;
  line-height: 1;
}
.mstat-lbl {
  font-size: 0.75rem;
  color: var(--text-secondary);
  margin-top: 0.25rem;
}
.mistakes-action-bar {
  display: flex;
  gap: 0.75rem;
  margin-bottom: 1.2rem;
  flex-wrap: wrap;
}
.start-drill-btn {
  background: linear-gradient(135deg, #ef4444, #dc2626);
  color: white;
  font-weight: 700;
  font-size: 0.95rem;
  padding: 0.75rem 1.4rem;
  border: none;
  border-radius: 8px;
  box-shadow: 0 4px 14px rgba(220, 38, 38, 0.3);
  cursor: pointer;
  transition: all 0.2s ease;
}
.start-drill-btn:hover:not(:disabled) {
  transform: translateY(-1px);
  box-shadow: 0 6px 18px rgba(220, 38, 38, 0.45);
}
.start-drill-btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}
.mistakes-filters-row {
  margin-bottom: 1.5rem;
}
.mistakes-list {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}
.mistake-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  padding: 1.25rem;
  transition: all 0.2s ease;
}
.mistake-card.is-unresolved {
  border-left: 4px solid var(--accent-red);
}
.mistake-card.is-resolved {
  border-left: 4px solid var(--accent-green);
  opacity: 0.85;
}
.mistake-card-top {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 0.75rem;
}
.mistake-subj-tag {
  font-size: 0.82rem;
  font-weight: 700;
  color: var(--accent-blue);
}
.mistake-status-pill {
  font-size: 0.75rem;
  font-weight: 700;
  padding: 0.2rem 0.6rem;
  border-radius: 9999px;
}
.mistake-status-pill.unresolved {
  background: rgba(239, 68, 68, 0.15);
  color: var(--accent-red);
}
.mistake-status-pill.resolved {
  background: rgba(16, 185, 129, 0.15);
  color: var(--accent-green);
}
.mistake-del-btn {
  background: none;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  font-size: 1rem;
  padding: 0.1rem 0.3rem;
}
.mistake-del-btn:hover {
  color: var(--accent-red);
}
.mistake-card-q {
  font-size: 1rem;
  font-weight: 600;
  line-height: 1.45;
  margin-bottom: 1rem;
  color: var(--text-primary);
}
.mistake-answers-compare {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.75rem;
  margin-bottom: 0.85rem;
}
.compare-box {
  padding: 0.65rem 0.85rem;
  border-radius: 8px;
  font-size: 0.88rem;
}
.compare-box.your-ans {
  background: rgba(239, 68, 68, 0.08);
  border: 1px dashed rgba(239, 68, 68, 0.3);
}
.compare-box.correct-ans {
  background: rgba(16, 185, 129, 0.08);
  border: 1px solid rgba(16, 185, 129, 0.3);
}
.compare-lbl {
  display: block;
  font-size: 0.72rem;
  color: var(--text-secondary);
  margin-bottom: 0.2rem;
  text-transform: uppercase;
  font-weight: 700;
}
.compare-val {
  font-weight: 700;
}
.mistake-explanation {
  background: var(--bg-tertiary);
  border-radius: 8px;
  padding: 0.75rem 0.9rem;
  font-size: 0.85rem;
  line-height: 1.45;
  margin-bottom: 0.85rem;
}
.mistake-card-bottom {
  display: flex;
  justify-content: flex-end;
  align-items: center;
}
.resolve-now-btn {
  background: rgba(16, 185, 129, 0.12);
  border: 1px solid var(--accent-green);
  color: var(--accent-green);
  font-weight: 700;
  padding: 0.4rem 0.85rem;
  border-radius: 6px;
  cursor: pointer;
}
.resolve-now-btn:hover {
  background: var(--accent-green);
  color: white;
}
.empty-mistakes-box {
  text-align: center;
  padding: 3rem 1.5rem;
  background: var(--bg-card);
  border-radius: 12px;
  border: 1px dashed var(--border-color);
}

/* Личный кабинет и ачивки */
.cabinet-container {
  max-width: 950px;
  margin: 0 auto;
  padding: 1.5rem 0;
}
.cabinet-header-card {
  display: flex;
  justify-content: space-between;
  align-items: center;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 14px;
  padding: 1.5rem;
  margin-bottom: 1.5rem;
  flex-wrap: wrap;
  gap: 1rem;
}
.cabinet-user-main {
  display: flex;
  align-items: center;
  gap: 1.25rem;
}
.cabinet-avatar-huge {
  font-size: 3.2rem;
  width: 76px;
  height: 76px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg-tertiary);
  border-radius: 50%;
  border: 2px solid var(--accent-blue);
}
.cabinet-user-name {
  font-size: 1.5rem;
  font-weight: 800;
  margin: 0;
}
.role-pill-badge {
  font-size: 0.75rem;
  font-weight: 700;
  padding: 0.2rem 0.6rem;
  border-radius: 9999px;
}
.role-pill-badge.student {
  background: rgba(37, 99, 235, 0.15);
  color: var(--accent-blue);
}
.role-pill-badge.teacher {
  background: rgba(147, 51, 234, 0.15);
  color: #9333ea;
}
.profile-status-badge {
  font-size: 0.72rem;
  font-weight: 700;
  padding: 0.15rem 0.5rem;
  border-radius: 9999px;
}
.profile-status-badge.guest-badge {
  background: var(--bg-tertiary);
  color: var(--text-secondary);
}
.profile-status-badge.cloud-badge {
  background: rgba(16, 185, 129, 0.15);
  color: var(--accent-green);
}
.cabinet-meta-line {
  font-size: 0.88rem;
  color: var(--text-secondary);
  margin-top: 0.4rem;
}
.cabinet-role-switch-banner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  background: linear-gradient(135deg, rgba(37, 99, 235, 0.08), rgba(124, 58, 237, 0.08));
  border: 1px solid rgba(59, 130, 246, 0.25);
  border-radius: 10px;
  padding: 1rem 1.25rem;
  margin-bottom: 1.5rem;
  flex-wrap: wrap;
  gap: 0.75rem;
}
.cabinet-stats-row {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 1rem;
  margin-bottom: 1.5rem;
}
.cab-stat-card {
  display: flex;
  align-items: center;
  gap: 1rem;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  padding: 1.1rem;
}
.cab-stat-icon {
  font-size: 2.2rem;
}
.cab-stat-num {
  font-size: 1.5rem;
  font-weight: 800;
  line-height: 1;
}
.cab-stat-lbl {
  font-size: 0.82rem;
  color: var(--text-secondary);
  margin-top: 0.2rem;
}
.cab-stat-hint {
  font-size: 0.72rem;
  color: var(--text-muted);
}
.cabinet-quick-actions {
  display: flex;
  gap: 0.75rem;
  margin-bottom: 1.75rem;
  flex-wrap: wrap;
}
.cabinet-section-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 14px;
  padding: 1.5rem;
  margin-bottom: 1.5rem;
}
.sec-card-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1.25rem;
  flex-wrap: wrap;
  gap: 0.5rem;
}
.sec-card-title {
  font-size: 1.2rem;
  font-weight: 800;
  margin: 0;
}
.sec-card-sub {
  font-size: 0.82rem;
  color: var(--text-secondary);
  margin-top: 0.15rem;
}
.achievements-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 1rem;
}
.achievement-card {
  display: flex;
  align-items: flex-start;
  gap: 0.85rem;
  background: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  border-radius: 10px;
  padding: 1rem;
  transition: all 0.2s ease;
}
.achievement-card.unlocked {
  border-color: rgba(234, 179, 8, 0.4);
  background: linear-gradient(135deg, rgba(234, 179, 8, 0.08), rgba(249, 115, 22, 0.05));
}
.achievement-card.locked {
  opacity: 0.55;
  filter: grayscale(0.8);
}
.ach-icon-wrap {
  font-size: 2rem;
  line-height: 1;
}
.ach-title {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--text-primary);
}
.ach-desc {
  font-size: 0.78rem;
  color: var(--text-secondary);
  margin: 0.2rem 0 0.5rem;
  line-height: 1.35;
}
.ach-progress-bar-wrap {
  height: 6px;
  background: rgba(0, 0, 0, 0.15);
  border-radius: 3px;
  overflow: hidden;
}
.ach-progress-fill {
  height: 100%;
  background: linear-gradient(90deg, #f59e0b, #ef4444);
  transition: width 0.4s ease;
}
.ach-progress-lbl {
  font-size: 0.7rem;
  color: var(--text-muted);
  margin-top: 0.25rem;
  font-weight: 600;
}
.achievement-toast-notice {
  position: fixed;
  bottom: 24px;
  right: 24px;
  z-index: 99999;
  display: flex;
  align-items: center;
  gap: 1rem;
  background: #1e293b;
  color: white;
  border: 1px solid #f59e0b;
  border-radius: 12px;
  padding: 1rem 1.25rem;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.4);
  opacity: 0;
  transform: translateY(20px);
  transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}
.achievement-toast-notice.show {
  opacity: 1;
  transform: translateY(0);
}
.achievement-toast-notice .toast-icon {
  font-size: 2.2rem;
}
.achievement-toast-notice .toast-header {
  font-size: 0.72rem;
  color: #f59e0b;
  text-transform: uppercase;
  font-weight: 800;
}
.achievement-toast-notice .toast-title {
  font-size: 1rem;
  font-weight: 800;
  margin: 0.1rem 0;
}
.achievement-toast-notice .toast-desc {
  font-size: 0.8rem;
  color: #94a3b8;
}
.teacher-metric-box {
  background: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  border-radius: 10px;
  padding: 1rem;
}
.t-met-title {
  font-size: 0.8rem;
  color: var(--text-secondary);
}
.t-met-val {
  font-size: 1.4rem;
  font-weight: 800;
  margin: 0.25rem 0;
}
.t-met-sub {
  font-size: 0.75rem;
  color: var(--text-muted);
}
.teacher-grade-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.88rem;
  margin-top: 0.5rem;
}
.teacher-grade-table th, .teacher-grade-table td {
  padding: 0.75rem 1rem;
  border-bottom: 1px solid var(--border-color);
  text-align: left;
}
.teacher-grade-table th {
  background: var(--bg-tertiary);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

/* Модальное окно профиля и входа */
.auth-modal-card {
  max-width: 480px;
  width: 90%;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 16px;
  padding: 1.75rem;
  position: relative;
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.4);
}
.auth-modal-title {
  font-size: 1.35rem;
  font-weight: 800;
  margin-bottom: 0.35rem;
}
.auth-modal-sub {
  font-size: 0.85rem;
  color: var(--text-secondary);
  line-height: 1.4;
}
.auth-field-lbl {
  display: block;
  font-size: 0.82rem;
  font-weight: 700;
  margin-bottom: 0.35rem;
  color: var(--text-primary);
}
.auth-text-input {
  width: 100%;
  padding: 0.7rem 0.9rem;
  border-radius: 8px;
  border: 1px solid var(--border-color);
  background: var(--bg-tertiary);
  color: var(--text-primary);
  font-size: 0.9rem;
}
.avatar-picker-row {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
  margin-top: 0.4rem;
}
.avatar-pick-btn {
  font-size: 1.4rem;
  width: 40px;
  height: 40px;
  border-radius: 8px;
  border: 1px solid var(--border-color);
  background: var(--bg-tertiary);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.15s ease;
}
.avatar-pick-btn.selected {
  border-color: var(--accent-blue);
  background: rgba(37, 99, 235, 0.2);
  transform: scale(1.1);
}
.profile-card-header {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding-bottom: 1.25rem;
  border-bottom: 1px solid var(--border-color);
  margin-bottom: 1.25rem;
}
.profile-card-avatar {
  font-size: 2.5rem;
  width: 58px;
  height: 58px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg-tertiary);
  border-radius: 50%;
}
.profile-card-name {
  font-size: 1.25rem;
  font-weight: 800;
}
.profile-card-meta {
  font-size: 0.82rem;
  color: var(--text-secondary);
  margin-top: 0.2rem;
}
.profile-stats-grid {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 0.75rem;
  margin-bottom: 1.25rem;
}
.profile-stat-box {
  background: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  border-radius: 10px;
  padding: 0.75rem 0.5rem;
  text-align: center;
}
.profile-actions-list {
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
}
.profile-action-btn {
  display: flex;
  justify-content: space-between;
  align-items: center;
  background: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  padding: 0.75rem 1rem;
  color: var(--text-primary);
  font-size: 0.88rem;
  font-weight: 600;
  cursor: pointer;
  text-align: left;
  transition: all 0.2s ease;
}
.profile-action-btn:hover {
  border-color: var(--accent-blue);
  background: var(--bg-card);
}
.cloud-promo-btn {
  background: linear-gradient(135deg, rgba(37, 99, 235, 0.1), rgba(124, 58, 237, 0.1));
  border-color: rgba(59, 130, 246, 0.35);
}
.oauth-login-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.6rem;
  width: 100%;
  padding: 0.75rem;
  border-radius: 8px;
  border: 1px solid var(--border-color);
  background: white;
  color: #1f2937;
  font-weight: 700;
  font-size: 0.9rem;
  cursor: pointer;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
}
.auth-divider-line {
  display: flex;
  align-items: center;
  text-align: center;
  margin: 1rem 0;
  color: var(--text-muted);
  font-size: 0.8rem;
}
.auth-divider-line::before, .auth-divider-line::after {
  content: '';
  flex: 1;
  border-bottom: 1px solid var(--border-color);
}
.auth-divider-line span {
  padding: 0 0.5rem;
}

/* ========================================================================
   НАЧАЛЬНЫЙ ЭКРАН (WELCOME GATE)
   ======================================================================== */
.welcome-gate-screen {
  position: fixed;
  inset: 0;
  z-index: 999999;
  background: rgba(8, 12, 20, 0.94);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1rem;
  overflow-y: auto;
  box-sizing: border-box;
  transition: opacity 0.3s cubic-bezier(0.16, 1, 0.3, 1), transform 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

.welcome-gate-screen.fade-out {
  opacity: 0;
  transform: scale(1.02);
  pointer-events: none;
}

.welcome-gate-card {
  max-width: 400px;
  width: 100%;
  max-height: calc(100vh - 32px);
  overflow-y: auto;
  box-sizing: border-box;
  background: #0f172a;
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 18px;
  padding: 1.75rem 1.6rem;
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.7);
  position: relative;
  animation: gateCardPop 0.35s cubic-bezier(0.16, 1, 0.3, 1);
}

@keyframes gateCardPop {
  0% {
    opacity: 0;
    transform: translateY(16px) scale(0.97);
  }
  100% {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

.gate-badge-row {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  flex-wrap: wrap;
  margin-bottom: 0.75rem;
}

.gate-badge {
  background: rgba(56, 189, 248, 0.1);
  color: #38bdf8;
  border: 1px solid rgba(56, 189, 248, 0.25);
  font-size: 0.75rem;
  font-weight: 700;
  padding: 0.2rem 0.55rem;
  border-radius: 9999px;
}

.gate-school-tag {
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--text-secondary);
}

.gate-header {
  margin-bottom: 1.25rem;
  text-align: center;
}

.gate-title {
  font-size: 1.65rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  margin: 0 0 0.35rem;
  color: var(--text-primary);
}

.gate-title span {
  color: #38bdf8;
}

.gate-subtitle {
  font-size: 0.84rem;
  color: var(--text-secondary);
  line-height: 1.45;
  margin: 0;
}

.gate-form-group {
  margin-bottom: 0.95rem;
}

.gate-label {
  display: block;
  font-size: 0.82rem;
  font-weight: 600;
  margin-bottom: 0.35rem;
  color: var(--text-primary);
}

.gate-input {
  width: 100%;
  padding: 0.72rem 0.95rem;
  border-radius: 10px;
  border: 1px solid rgba(255, 255, 255, 0.12);
  background: rgba(15, 23, 42, 0.6);
  color: var(--text-primary);
  font-size: 0.92rem;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
  font-family: inherit;
  box-sizing: border-box;
}

.gate-input:focus {
  outline: none;
  border-color: #38bdf8;
  box-shadow: 0 0 0 3px rgba(56, 189, 248, 0.2);
}

.gate-submit-btn {
  width: 100%;
  padding: 0.82rem 1.25rem;
  border-radius: 10px;
  border: none;
  background: #38bdf8;
  color: #0b1120;
  font-size: 0.95rem;
  font-weight: 700;
  cursor: pointer;
  transition: all 0.18s ease;
  margin-top: 0.4rem;
  font-family: inherit;
  box-shadow: 0 4px 14px rgba(56, 189, 248, 0.3);
}

.gate-submit-btn:hover {
  background: #7dd3fc;
  transform: translateY(-1px);
  box-shadow: 0 6px 20px rgba(56, 189, 248, 0.45);
}

.gate-divider {
  display: flex;
  align-items: center;
  text-align: center;
  margin: 1.2rem 0;
  color: var(--text-muted);
  font-size: 0.76rem;
}

.gate-divider::before, .gate-divider::after {
  content: '';
  flex: 1;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.gate-divider span {
  padding: 0 0.5rem;
}

/* Секция входа преподавателя */
.gate-teacher-section {
  display: flex;
  flex-direction: column;
  gap: 0.65rem;
}

.gate-teacher-toggle-btn {
  width: 100%;
  padding: 0.65rem 1rem;
  background: rgba(255, 255, 255, 0.03);
  border: 1px dashed rgba(255, 255, 255, 0.16);
  border-radius: 10px;
  color: var(--text-secondary);
  font-size: 0.85rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s ease;
  font-family: inherit;
}

.gate-teacher-toggle-btn:hover,
.gate-teacher-toggle-btn.active {
  background: rgba(56, 189, 248, 0.08);
  border-color: #38bdf8;
  color: #38bdf8;
}

.gate-teacher-panel {
  background: rgba(11, 17, 30, 0.7);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 12px;
  padding: 0.95rem;
  animation: fadeInView 0.2s ease;
}

.gate-teacher-input-row {
  display: flex;
  gap: 0.5rem;
  margin-top: 0.4rem;
}

.gate-teacher-submit-btn {
  padding: 0.65rem 1rem;
  background: #38bdf8;
  color: #0b1120;
  border: none;
  border-radius: 10px;
  font-weight: 700;
  font-size: 0.85rem;
  cursor: pointer;
  white-space: nowrap;
  transition: all 0.18s ease;
  font-family: inherit;
}

.gate-teacher-submit-btn:hover {
  background: #7dd3fc;
  transform: translateY(-1px);
}

.gate-error-msg {
  background: rgba(239, 68, 68, 0.15);
  border: 1px solid var(--accent-red);
  color: var(--accent-red);
  border-radius: 8px;
  padding: 0.55rem 0.8rem;
  font-size: 0.82rem;
  font-weight: 600;
  margin-top: 0.5rem;
  animation: shakeError 0.3s ease-in-out;
}

/* ==========================================================================
   Кликабельные карточки заданий в конспекте
   ========================================================================== */
.formula-item.clickable-task-card {
  cursor: pointer;
  transition: transform 0.2s cubic-bezier(0.16, 1, 0.3, 1),
              border-color 0.2s cubic-bezier(0.16, 1, 0.3, 1),
              box-shadow 0.2s cubic-bezier(0.16, 1, 0.3, 1),
              background 0.2s cubic-bezier(0.16, 1, 0.3, 1);
  border-radius: 10px;
  position: relative;
}

.formula-item.clickable-task-card:hover {
  transform: translateY(-3px);
  border-color: rgba(56, 189, 248, 0.45);
  background: rgba(15, 23, 42, 0.95);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.4), 0 0 16px rgba(56, 189, 248, 0.12);
}

.formula-card-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem;
  margin-bottom: 0.35rem;
}

.formula-open-hint {
  font-size: 0.72rem;
  font-weight: 600;
  color: var(--text-muted);
  background: rgba(255, 255, 255, 0.05);
  padding: 0.2rem 0.55rem;
  border-radius: 9999px;
  transition: all 0.15s ease;
  white-space: nowrap;
}

.formula-item.clickable-task-card:hover .formula-open-hint {
  color: #38bdf8;
  background: rgba(56, 189, 248, 0.16);
}

/* ==========================================================================
   Модальное окно детального разбора заданий (#task-detail-modal)
   ========================================================================== */
.task-modal-overlay {
  position: fixed;
  inset: 0;
  z-index: 100000;
  background: rgba(8, 12, 20, 0.85);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1.5rem 1rem;
  box-sizing: border-box;
  animation: fadeInView 0.25s cubic-bezier(0.16, 1, 0.3, 1);
}

.task-modal-dialog {
  max-width: 820px;
  width: 100%;
  max-height: 92vh;
  display: flex;
  flex-direction: column;
  background: #0f172a;
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 18px;
  box-shadow: 0 25px 70px rgba(0, 0, 0, 0.75);
  overflow: hidden;
  box-sizing: border-box;
}

.task-modal-header {
  padding: 1.25rem 1.5rem;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 1rem;
  background: rgba(15, 23, 42, 0.8);
}

.task-modal-badges {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  flex-wrap: wrap;
  margin-bottom: 0.5rem;
}

.task-badge {
  font-size: 0.75rem;
  font-weight: 700;
  padding: 0.2rem 0.6rem;
  border-radius: 9999px;
}

.task-badge-fipi {
  background: rgba(56, 189, 248, 0.12);
  color: #38bdf8;
  border: 1px solid rgba(56, 189, 248, 0.3);
}

.task-badge-subj {
  background: rgba(255, 255, 255, 0.06);
  color: var(--text-primary);
  border: 1px solid rgba(255, 255, 255, 0.1);
}

.task-badge-score {
  background: rgba(34, 197, 94, 0.12);
  color: #4ade80;
  border: 1px solid rgba(34, 197, 94, 0.3);
}

.task-modal-title {
  font-size: 1.35rem;
  font-weight: 800;
  color: var(--text-primary);
  margin: 0;
  letter-spacing: -0.01em;
}

.task-modal-close-btn {
  width: 34px;
  height: 34px;
  border-radius: 50%;
  border: 1px solid rgba(255, 255, 255, 0.12);
  background: rgba(255, 255, 255, 0.04);
  color: var(--text-secondary);
  font-size: 1.1rem;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all 0.18s ease;
  flex-shrink: 0;
}

.task-modal-close-btn:hover {
  background: rgba(239, 68, 68, 0.2);
  color: #f87171;
  border-color: rgba(239, 68, 68, 0.4);
}

.task-modal-nav-tabs {
  display: flex;
  gap: 0.35rem;
  padding: 0.65rem 1.25rem;
  background: rgba(11, 17, 30, 0.7);
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  overflow-x: auto;
}

.task-nav-tab {
  padding: 0.42rem 0.95rem;
  border-radius: 9999px;
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--text-secondary);
  background: transparent;
  border: 1px solid transparent;
  cursor: pointer;
  white-space: nowrap;
  transition: all 0.15s ease;
  font-family: inherit;
}

.task-nav-tab:hover {
  color: var(--text-primary);
  background: rgba(255, 255, 255, 0.06);
}

.task-nav-tab.active {
  color: #38bdf8;
  background: rgba(56, 189, 248, 0.12);
  border-color: rgba(56, 189, 248, 0.35);
}

.task-modal-body {
  padding: 1.5rem;
  overflow-y: auto;
  flex: 1;
  box-sizing: border-box;
}

.task-spec-bar {
  display: flex;
  gap: 0.65rem;
  flex-wrap: wrap;
  margin-bottom: 1.35rem;
  padding: 0.75rem 1rem;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid rgba(255, 255, 255, 0.06);
  border-radius: 10px;
  font-size: 0.82rem;
}

.spec-chip {
  color: var(--text-secondary);
}

.spec-chip strong {
  color: var(--text-primary);
}

.task-prose h4 {
  font-size: 1.05rem;
  font-weight: 700;
  margin: 1.25rem 0 0.5rem;
  color: #38bdf8;
}

.task-prose h4:first-child {
  margin-top: 0;
}

.task-prose p {
  font-size: 0.92rem;
  line-height: 1.6;
  color: var(--text-secondary);
  margin-bottom: 0.85rem;
}

.task-prose ul, .task-prose ol {
  margin: 0.5rem 0 1rem 1.4rem;
  font-size: 0.9rem;
  line-height: 1.6;
  color: var(--text-secondary);
}

.task-prose li {
  margin-bottom: 0.4rem;
}

.task-formula-box {
  background: rgba(11, 17, 30, 0.9);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 10px;
  padding: 0.85rem 1.15rem;
  margin: 0.85rem 0;
  font-family: var(--font-mono);
  font-size: 1.05rem;
  color: #f8fafc;
  overflow-x: auto;
}

.task-step-list {
  display: flex;
  flex-direction: column;
  gap: 0.85rem;
  margin-top: 0.85rem;
}

.task-step-item {
  display: flex;
  gap: 0.85rem;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid rgba(255, 255, 255, 0.06);
  border-radius: 12px;
  padding: 0.95rem 1.1rem;
}

.task-step-num {
  font-size: 0.75rem;
  font-weight: 800;
  padding: 0.25rem 0.6rem;
  border-radius: 8px;
  background: rgba(56, 189, 248, 0.15);
  color: #38bdf8;
  height: fit-content;
  white-space: nowrap;
}

.task-step-desc {
  font-size: 0.9rem;
  line-height: 1.55;
  color: var(--text-secondary);
}

.task-step-desc strong {
  color: var(--text-primary);
}

.task-example-card {
  background: rgba(11, 17, 30, 0.8);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 12px;
  padding: 1.15rem 1.25rem;
  margin-bottom: 1.25rem;
}

.task-example-badge {
  display: inline-block;
  font-size: 0.74rem;
  font-weight: 700;
  color: #38bdf8;
  background: rgba(56, 189, 248, 0.1);
  border: 1px solid rgba(56, 189, 248, 0.25);
  padding: 0.2rem 0.6rem;
  border-radius: 6px;
  margin-bottom: 0.65rem;
}

.task-example-solution {
  background: rgba(15, 23, 42, 0.6);
  border-top: 1px solid rgba(255, 255, 255, 0.06);
  padding-top: 0.85rem;
  margin-top: 0.85rem;
  font-size: 0.9rem;
}

.task-answer-box {
  display: inline-block;
  margin-top: 0.75rem;
  padding: 0.35rem 0.85rem;
  background: rgba(34, 197, 94, 0.12);
  border: 1px solid rgba(34, 197, 94, 0.3);
  border-radius: 8px;
  color: #4ade80;
  font-weight: 700;
}

.task-modal-footer {
  padding: 0.95rem 1.5rem;
  background: rgba(15, 23, 42, 0.9);
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.task-modal-footer-left {
  display: flex;
  gap: 0.5rem;
}

.task-footer-btn {
  padding: 0.42rem 0.85rem;
  border-radius: 8px;
  font-size: 0.82rem;
  font-weight: 600;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.1);
  color: var(--text-primary);
  cursor: pointer;
  transition: all 0.15s ease;
  font-family: inherit;
}

.task-footer-btn:hover:not(:disabled) {
  background: rgba(56, 189, 248, 0.15);
  border-color: rgba(56, 189, 248, 0.35);
  color: #38bdf8;
}

.task-footer-btn:disabled {
  opacity: 0.35;
  cursor: not-allowed;
}

.task-footer-close-btn {
  padding: 0.45rem 1.1rem;
  border-radius: 8px;
  font-size: 0.84rem;
  font-weight: 700;
  background: rgba(255, 255, 255, 0.08);
  color: var(--text-primary);
  border: 1px solid rgba(255, 255, 255, 0.12);
  cursor: pointer;
  transition: all 0.15s ease;
  font-family: inherit;
}

.task-footer-close-btn:hover {
  background: #38bdf8;
  color: #0b1120;
  border-color: #38bdf8;
}

.gate-error-msg {
  background: rgba(239, 68, 68, 0.15);
  border: 1px solid var(--accent-red);
  color: var(--accent-red);
  border-radius: 8px;
  padding: 0.6rem 0.85rem;
  font-size: 0.85rem;
  font-weight: 600;
  margin-top: 0.5rem;
  animation: shakeError 0.3s ease-in-out;
}

@keyframes shakeError {
  0%, 100% { transform: translateX(0); }
  25% { transform: translateX(-4px); }
  75% { transform: translateX(4px); }
}

.gate-hint-text {
  font-size: 0.75rem;
  color: var(--text-muted);
  margin-top: 0.35rem;
  line-height: 1.35;
}

.gate-footer {
  text-align: center;
  font-size: 0.74rem;
  color: var(--text-muted);
  margin-top: 1.25rem;
  line-height: 1.35;
}

/* ==========================================================================
   Капсульная панель навигации в шапке (по референсам Фото 1 и Фото 2)
   ========================================================================== */
.nav-capsule-bar {
  display: flex;
  align-items: center;
  gap: 0.3rem;
  padding: 4px 6px;
  background: rgba(15, 23, 42, 0.78);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 9999px;
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  box-shadow: 0 4px 18px rgba(0, 0, 0, 0.3), inset 0 1px 0 rgba(255, 255, 255, 0.05);
}

[data-theme="light"] .nav-capsule-bar {
  background: rgba(241, 245, 249, 0.88);
  border-color: rgba(15, 23, 42, 0.08);
  box-shadow: 0 4px 18px rgba(0, 0, 0, 0.05), inset 0 1px 0 rgba(255, 255, 255, 0.6);
}

.nav-capsule-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  padding: 0.42rem 0.88rem;
  border-radius: 9999px;
  font-size: 0.84rem;
  font-weight: 500;
  color: var(--text-secondary);
  background: transparent;
  border: 1px solid transparent;
  transition: all var(--transition-fast, 0.18s ease);
  cursor: pointer;
  white-space: nowrap;
  user-select: none;
  font-family: inherit;
}

.nav-capsule-btn:hover {
  color: var(--text-primary);
  background: rgba(255, 255, 255, 0.06);
}

[data-theme="light"] .nav-capsule-btn:hover {
  background: rgba(15, 23, 42, 0.06);
}

/* Активный пункт меню — неоновый контур-пилл как на Фото 1 */
.nav-capsule-btn.active {
  color: #38bdf8;
  background: rgba(56, 189, 248, 0.12);
  border-color: rgba(56, 189, 248, 0.45);
  font-weight: 600;
  box-shadow: 0 0 12px rgba(56, 189, 248, 0.18);
}

[data-theme="light"] .nav-capsule-btn.active {
  color: #0284c7;
  background: rgba(2, 132, 199, 0.1);
  border-color: rgba(2, 132, 199, 0.35);
  box-shadow: 0 0 8px rgba(2, 132, 199, 0.12);
}

.nav-btn-icon {
  font-size: 0.95rem;
  line-height: 1;
}

/* ==========================================================================
   Главный экран: Герой, фильтры и сетка предметов (#view-home)
   ========================================================================== */
#view-home {
  max-width: 1200px;
  margin: 0 auto;
  padding: 1.5rem 1rem 3.5rem;
  animation: fadeInView 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

@keyframes fadeInView {
  from {
    opacity: 0;
    transform: translateY(8px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.home-hero-section {
  text-align: center;
  max-width: 860px;
  margin: 0.5rem auto 2.5rem;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.home-hero-badge-row {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.6rem;
  margin-bottom: 1.1rem;
  flex-wrap: wrap;
}

.home-badge-pill {
  display: inline-flex;
  align-items: center;
  padding: 0.3rem 0.85rem;
  border-radius: 9999px;
  font-size: 0.78rem;
  font-weight: 600;
  background: rgba(56, 189, 248, 0.1);
  border: 1px solid rgba(56, 189, 248, 0.28);
  color: #38bdf8;
  letter-spacing: 0.02em;
}

.home-badge-pill.school-pill {
  background: rgba(255, 255, 255, 0.04);
  border-color: rgba(255, 255, 255, 0.08);
  color: var(--text-secondary);
  cursor: pointer;
  transition: all var(--transition-fast, 0.18s ease);
}

.home-badge-pill.school-pill:hover {
  background: rgba(56, 189, 248, 0.1);
  border-color: rgba(56, 189, 248, 0.3);
  color: #38bdf8;
  transform: translateY(-1px);
}

.home-hero-title {
  font-size: 2.3rem;
  font-weight: 800;
  line-height: 1.22;
  letter-spacing: -0.03em;
  color: var(--text-primary);
  margin-bottom: 0.85rem;
}

@media (max-width: 768px) {
  .home-hero-title {
    font-size: 1.65rem;
  }
}

.home-hero-subtitle {
  font-size: 1.02rem;
  line-height: 1.6;
  color: var(--text-secondary);
  max-width: 680px;
  margin-bottom: 1.75rem;
}

/* Капсульный переключатель категорий предметов (стиль Фото 2) */
.home-category-capsule-wrap {
  display: flex;
  justify-content: center;
  width: 100%;
  margin-top: 0.25rem;
}

.home-category-capsule {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 4px 6px;
  background: rgba(15, 23, 42, 0.78);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 9999px;
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  box-shadow: 0 4px 18px rgba(0, 0, 0, 0.25);
  overflow-x: auto;
  max-width: 100%;
}

[data-theme="light"] .home-category-capsule {
  background: rgba(241, 245, 249, 0.88);
  border-color: rgba(15, 23, 42, 0.08);
  box-shadow: 0 4px 18px rgba(0, 0, 0, 0.05);
}

.category-pill {
  display: inline-flex;
  align-items: center;
  white-space: nowrap;
  padding: 0.42rem 0.95rem;
  border-radius: 9999px;
  font-size: 0.82rem;
  font-weight: 500;
  color: var(--text-secondary);
  background: transparent;
  border: 1px solid transparent;
  cursor: pointer;
  transition: all var(--transition-fast, 0.18s ease);
  font-family: inherit;
}

.category-pill:hover {
  color: var(--text-primary);
  background: rgba(255, 255, 255, 0.06);
}

[data-theme="light"] .category-pill:hover {
  background: rgba(15, 23, 42, 0.06);
}

/* Активный пункт фильтра (стиль Фото 2: плотная тёмная плашка со светлым текстом) */
.category-pill.active {
  color: #ffffff;
  background: #1e293b;
  border-color: rgba(255, 255, 255, 0.15);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.25);
  font-weight: 600;
}

[data-theme="light"] .category-pill.active {
  color: #0f172a;
  background: #ffffff;
  border-color: rgba(15, 23, 42, 0.15);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
}

/* ==========================================================================
   Центральная сетка карточек предметов
   ========================================================================== */
.home-subjects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 1.25rem;
  width: 100%;
}

@media (max-width: 680px) {
  .home-subjects-grid {
    grid-template-columns: 1fr;
    gap: 1rem;
  }
}

.home-subject-card {
  position: relative;
  background: rgba(15, 20, 34, 0.72);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 16px;
  padding: 1.35rem 1.4rem;
  display: flex;
  flex-direction: column;
  gap: 1rem;
  cursor: pointer;
  transition: transform 0.22s cubic-bezier(0.16, 1, 0.3, 1), 
              box-shadow 0.22s cubic-bezier(0.16, 1, 0.3, 1), 
              border-color 0.22s cubic-bezier(0.16, 1, 0.3, 1);
  overflow: hidden;
  user-select: none;
}

[data-theme="light"] .home-subject-card {
  background: #ffffff;
  border-color: rgba(15, 23, 42, 0.08);
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.04);
}

.home-subject-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: #38bdf8;
  opacity: 0;
  transition: opacity 0.2s ease;
}

.home-subject-card:hover {
  transform: translateY(-4px);
  border-color: rgba(56, 189, 248, 0.3);
  box-shadow: 0 12px 30px rgba(0, 0, 0, 0.4), 0 0 20px rgba(56, 189, 248, 0.08);
}

[data-theme="light"] .home-subject-card:hover {
  box-shadow: 0 12px 30px rgba(15, 23, 42, 0.08);
  border-color: rgba(2, 132, 199, 0.3);
}

.home-subject-card:hover::before {
  opacity: 1;
}

.home-subject-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
}

.home-subject-icon-box {
  width: 46px;
  height: 46px;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.45rem;
  flex-shrink: 0;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.08);
  color: var(--text-primary);
  transition: all 0.2s ease;
}

[data-theme="light"] .home-subject-icon-box {
  background: rgba(15, 23, 42, 0.04);
  border-color: rgba(15, 23, 42, 0.08);
}

.home-subject-card:hover .home-subject-icon-box {
  background: rgba(56, 189, 248, 0.1);
  border-color: rgba(56, 189, 248, 0.3);
  transform: scale(1.04);
}

.home-subject-badges {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  flex-wrap: wrap;
  justify-content: flex-end;
}

.home-cat-badge {
  font-size: 0.72rem;
  font-weight: 500;
  padding: 0.2rem 0.55rem;
  border-radius: 6px;
  background: rgba(255, 255, 255, 0.04);
  color: var(--text-muted);
  border: 1px solid rgba(255, 255, 255, 0.06);
}

.home-cat-badge.home-cat-mandatory {
  background: rgba(56, 189, 248, 0.08);
  color: #38bdf8;
  border-color: rgba(56, 189, 248, 0.22);
}

.home-cat-badge.home-cat-technical,
.home-cat-badge.home-cat-humanities,
.home-cat-badge.home-cat-science {
  background: rgba(255, 255, 255, 0.04);
  color: var(--text-secondary);
  border-color: rgba(255, 255, 255, 0.06);
}

.home-score-badge {
  font-size: 0.72rem;
  font-weight: 500;
  padding: 0.2rem 0.55rem;
  border-radius: 6px;
  background: rgba(255, 255, 255, 0.03);
  color: var(--text-muted);
  border: 1px solid rgba(255, 255, 255, 0.05);
}

.home-subject-body {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
  flex-grow: 1;
}

.home-subject-title {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text-primary);
  margin: 0;
  letter-spacing: -0.01em;
}

.home-subject-desc {
  font-size: 0.85rem;
  line-height: 1.45;
  color: var(--text-secondary);
  margin: 0;
  min-height: 2.5em;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.home-subject-meta {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-top: 0.4rem;
  font-size: 0.8rem;
  color: var(--text-muted);
}

.home-subject-meta .meta-item {
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
}

.home-subject-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 0.85rem;
  border-top: 1px solid rgba(255, 255, 255, 0.06);
  font-size: 0.82rem;
}

[data-theme="light"] .home-subject-footer {
  border-top-color: rgba(15, 23, 42, 0.06);
}

.home-open-link {
  font-weight: 600;
  color: #38bdf8;
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  transition: transform var(--transition-fast, 0.18s ease);
}

.home-subject-card:hover .home-open-link .arrow {
  transform: translateX(4px);
}

.home-open-link .arrow {
  transition: transform 0.2s ease;
}

.home-pass-threshold {
  font-size: 0.74rem;
  color: var(--text-muted);
  max-width: 140px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

/* ==========================================================================
   Панель возврата к выбору предметов в просмотре (#view-cheatsheet)
   ========================================================================== */
.subject-view-top-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.65rem 0.95rem;
  margin-bottom: 1.25rem;
  background: rgba(15, 23, 42, 0.72);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: var(--radius-md, 10px);
  backdrop-filter: blur(10px);
}

[data-theme="light"] .subject-view-top-bar {
  background: rgba(241, 245, 249, 0.88);
  border-color: rgba(15, 23, 42, 0.08);
}

.back-to-home-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  padding: 0.4rem 0.95rem;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.14);
  border-radius: 9999px;
  color: var(--text-primary);
  font-size: 0.84rem;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition-fast, 0.18s ease);
  font-family: inherit;
}

.back-to-home-btn:hover {
  background: rgba(56, 189, 248, 0.15);
  border-color: rgba(56, 189, 248, 0.45);
  color: #38bdf8;
  transform: translateX(-2px);
}

.back-arrow {
  font-weight: 700;
  transition: transform var(--transition-fast, 0.18s ease);
}

.back-to-home-btn:hover .back-arrow {
  transform: translateX(-3px);
}

.subject-view-breadcrumb {
  display: flex;
  align-items: center;
  gap: 0.45rem;
  font-size: 0.82rem;
  color: var(--text-muted);
}

.crumb-home {
  cursor: pointer;
  color: var(--text-secondary);
  transition: color var(--transition-fast, 0.18s ease);
}

.crumb-home:hover {
  color: #38bdf8;
  text-decoration: underline;
}

.crumb-sep {
  opacity: 0.5;
}

.crumb-active {
  font-weight: 600;
  color: var(--text-primary);
}

/* ==========================================================================
   Стили для формул в разборе заданий ФИПИ / Решу ОГЭ (чистый HTML без LaTeX)
   ========================================================================== */
.task-formula-box {
  background: var(--bg-tertiary, #0d1527);
  border: 1px solid var(--border-color, #1e293b);
  border-left: 3px solid #38bdf8;
  border-radius: 8px;
  padding: 12px 16px;
  margin: 12px 0 16px 0;
  display: flex;
  flex-direction: column;
  gap: 8px;
  font-family: inherit;
}

.task-formula-box .math-row {
  font-size: 0.95rem;
  color: var(--text-primary, #f8fafc);
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 6px;
  line-height: 1.5;
}

.task-formula-box .math-row strong {
  color: #38bdf8;
  font-weight: 600;
}

.task-formula-box .math-subtext {
  font-size: 0.84rem;
  color: var(--text-secondary, #94a3b8);
  margin-top: 2px;
}

/* ==========================================================================
   Раздел «Библиотеки рядом» и панель геолокации
   ========================================================================== */
.geo-finder-card {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 1.25rem 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
  box-shadow: var(--shadow-md);
  margin-bottom: 1.75rem;
}

.geo-status-indicator {
  display: flex;
  align-items: center;
  gap: 0.85rem;
}

.geo-pulse-dot {
  display: inline-block;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: #10b981;
  box-shadow: 0 0 10px #10b981;
  animation: pulse-geo 2s infinite;
}

@keyframes pulse-geo {
  0% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(16, 185, 129, 0.7); }
  70% { transform: scale(1); box-shadow: 0 0 0 8px rgba(16, 185, 129, 0); }
  100% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(16, 185, 129, 0); }
}

.geo-detect-btn {
  background: linear-gradient(135deg, #2563eb, #3b82f6) !important;
  color: white !important;
  border: none !important;
  font-weight: 700 !important;
  padding: 0.65rem 1.25rem !important;
  border-radius: 9999px !important;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  cursor: pointer;
  transition: all var(--transition-normal);
}

.geo-detect-btn:hover {
  background: linear-gradient(135deg, #1d4ed8, #2563eb) !important;
  transform: translateY(-2px);
  box-shadow: 0 4px 14px rgba(37, 99, 235, 0.4);
}

.geo-reset-btn {
  background: rgba(255, 255, 255, 0.08) !important;
  border: 1px solid var(--border-color) !important;
  color: var(--text-secondary) !important;
  font-weight: 600 !important;
  padding: 0.65rem 1.15rem !important;
  border-radius: 9999px !important;
  cursor: pointer;
  transition: all var(--transition-normal);
}

.geo-reset-btn:hover {
  background: rgba(255, 255, 255, 0.15) !important;
  color: var(--text-primary) !important;
}

/* Кликабельные карточки заданий с открытием разбора */
.clickable-task-card {
  cursor: pointer;
  transition: transform 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease;
}

.clickable-task-card:hover {
  transform: translateY(-3px);
  border-color: #38bdf8 !important;
  box-shadow: 0 8px 24px rgba(56, 189, 248, 0.15);
}

.formula-open-hint {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-size: 0.8rem;
  font-weight: 700;
  color: #38bdf8;
  margin-top: 6px;
  opacity: 0.9;
  transition: opacity 0.2s ease, transform 0.2s ease;
}

.clickable-task-card:hover .formula-open-hint {
  opacity: 1;
  transform: translateX(3px);
}