/* ===================================================================
   CCE EXAM HUB - MODERN MINIMAL FULL-SCREEN DESIGN SYSTEM
   Ultra-Modern, Minimalist, High-Contrast Glassmorphic Aesthetic
   Optimized for Full-Screen Widescreen & Fluid Responsiveness
   =================================================================== */

@import url('https://fonts.googleapis.com/css2?family=Outfit:wght@400;500;600;700;800;900&family=Plus+Jakarta+Sans:ital,wght@0,300;0,400;0,500;0,600;0,700;0,800;1,400;1,600&family=JetBrains+Mono:wght@400;500;600;700&display=swap');
@import url('notes-reader.css');

:root {
  /* Dark Theme (Default) */
  --bg-primary: #070a11;
  --bg-secondary: #0d121f;
  --bg-elevated: #111827;
  --bg-card: rgba(17, 24, 39, 0.72);
  --bg-card-hover: rgba(26, 36, 56, 0.88);
  --bg-glass: rgba(10, 15, 26, 0.78);
  
  --border-subtle: rgba(255, 255, 255, 0.08);
  --border-medium: rgba(255, 255, 255, 0.14);
  --border-glow: rgba(99, 102, 241, 0.4);
  --border-active: #6366f1;

  --text-primary: #f8fafc;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  --text-inverse: #070a11;

  /* Premium Modern Accents */
  --accent-primary: #6366f1;
  --accent-secondary: #0ea5e9;
  --accent-tertiary: #8b5cf6;
  --accent-success: #10b981;
  --accent-warning: #f59e0b;
  --accent-danger: #f43f5e;
  
  --accent-gradient: linear-gradient(135deg, #6366f1 0%, #8b5cf6 50%, #0ea5e9 100%);
  --accent-gradient-glow: linear-gradient(135deg, rgba(99, 102, 241, 0.28) 0%, rgba(139, 92, 246, 0.22) 50%, rgba(14, 165, 233, 0.25) 100%);
  --hero-glow: radial-gradient(circle at 50% 15%, rgba(99, 102, 241, 0.18) 0%, rgba(139, 92, 246, 0.12) 35%, rgba(14, 165, 233, 0.06) 60%, transparent 80%);

  /* Subject Badge Tokens */
  --tag-polity: #38bdf8;
  --tag-polity-bg: rgba(56, 189, 248, 0.12);
  --tag-economy: #34d399;
  --tag-economy-bg: rgba(52, 211, 153, 0.12);
  --tag-history: #fbbf24;
  --tag-history-bg: rgba(251, 191, 36, 0.12);
  --tag-env: #4ade80;
  --tag-env-bg: rgba(74, 222, 128, 0.12);
  --tag-science: #c084fc;
  --tag-science-bg: rgba(192, 132, 252, 0.12);
  --tag-reasoning: #a855f7;
  --tag-reasoning-bg: rgba(168, 85, 247, 0.14);
  --tag-quant: #f59e0b;
  --tag-quant-bg: rgba(245, 158, 11, 0.14);
  --tag-heritage: #ec4899;
  --tag-heritage-bg: rgba(236, 72, 153, 0.14);
  --tag-geography: #06b6d4;
  --tag-geography-bg: rgba(6, 182, 212, 0.14);
  --tag-english: #6366f1;
  --tag-english-bg: rgba(99, 102, 241, 0.14);
  --tag-gujarati: #f43f5e;
  --tag-gujarati-bg: rgba(244, 63, 94, 0.14);
  --tag-current: #14b8a6;
  --tag-current-bg: rgba(20, 184, 166, 0.14);

  /* Shadows & Elevation */
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 8px 24px -4px rgba(0, 0, 0, 0.45), 0 4px 10px -2px rgba(0, 0, 0, 0.3);
  --shadow-lg: 0 20px 40px -12px rgba(0, 0, 0, 0.55), 0 0 1px 1px rgba(255, 255, 255, 0.06) inset;
  --shadow-glow: 0 0 35px -5px rgba(99, 102, 241, 0.35);

  /* Border Radii */
  --radius-xs: 6px;
  --radius-sm: 10px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-xl: 28px;
  --radius-full: 9999px;

  /* Transitions */
  --transition-fast: 0.15s cubic-bezier(0.16, 1, 0.3, 1);
  --transition-normal: 0.25s cubic-bezier(0.16, 1, 0.3, 1);
  --transition-slow: 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}

/* Light Theme Variables */
[data-theme="light"] {
  --bg-primary: #f8fafc;
  --bg-secondary: #f1f5f9;
  --bg-elevated: #ffffff;
  --bg-card: rgba(255, 255, 255, 0.85);
  --bg-card-hover: #ffffff;
  --bg-glass: rgba(255, 255, 255, 0.88);
  
  --border-subtle: rgba(15, 23, 42, 0.08);
  --border-medium: rgba(15, 23, 42, 0.14);
  --border-glow: rgba(99, 102, 241, 0.25);
  --border-active: #4f46e5;

  --text-primary: #0f172a;
  --text-secondary: #475569;
  --text-muted: #64748b;
  --text-inverse: #f8fafc;

  --shadow-sm: 0 2px 6px rgba(15, 23, 42, 0.05);
  --shadow-md: 0 8px 20px -4px rgba(15, 23, 42, 0.08);
  --shadow-lg: 0 20px 35px -10px rgba(15, 23, 42, 0.12);
  --shadow-glow: 0 0 30px rgba(99, 102, 241, 0.15);
  --hero-glow: radial-gradient(circle at 50% 15%, rgba(99, 102, 241, 0.1) 0%, rgba(139, 92, 246, 0.06) 40%, transparent 75%);
}

/* Base Reset */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: 'Plus Jakarta Sans', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  background-color: var(--bg-primary);
  color: var(--text-primary);
  min-height: 100vh;
  line-height: 1.6;
  overflow-x: hidden;
  background-image: 
    radial-gradient(at 100% 0%, rgba(99, 102, 241, 0.08) 0px, transparent 45%),
    radial-gradient(at 0% 100%, rgba(14, 165, 233, 0.06) 0px, transparent 45%);
  background-attachment: fixed;
  transition: background-color var(--transition-normal), color var(--transition-normal);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* Typography Defaults */
h1, h2, h3, h4, h5, h6 {
  font-family: 'Outfit', sans-serif;
  color: var(--text-primary);
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: -0.025em;
}

a {
  color: inherit;
  text-decoration: none;
}

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

input, select, textarea {
  font-family: inherit;
}

/* Full-Screen Fluid Container */
.container {
  max-width: 1540px;
  width: min(94vw, 1540px);
  margin: 0 auto;
  padding: 0 1.25rem;
}

/* ===================================================================
   ULTRA-MODERN MINIMAL NAVBAR
   =================================================================== */
.navbar {
  position: sticky;
  top: 0;
  z-index: 100;
  backdrop-filter: blur(24px);
  -webkit-backdrop-filter: blur(24px);
  background: var(--bg-glass);
  border-bottom: 1px solid var(--border-subtle);
  transition: all var(--transition-normal);
}

.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 70px;
  gap: 1.5rem;
}

/* Brand Logo */
.brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-family: 'Outfit', sans-serif;
  font-weight: 800;
  font-size: 1.25rem;
  color: var(--text-primary);
  white-space: nowrap;
  letter-spacing: -0.01em;
}

.brand-icon {
  width: 38px;
  height: 38px;
  background: var(--accent-gradient);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  box-shadow: 0 4px 16px rgba(99, 102, 241, 0.4);
  flex-shrink: 0;
  transition: transform var(--transition-fast);
}

.brand:hover .brand-icon {
  transform: rotate(-5deg) scale(1.05);
}

.brand-text {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.brand-badge {
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  background: rgba(99, 102, 241, 0.15);
  color: var(--accent-primary);
  padding: 0.2rem 0.55rem;
  border-radius: var(--radius-full);
  border: 1px solid rgba(99, 102, 241, 0.28);
  white-space: nowrap;
}

/* Segmented Modern Nav Links */
.nav-links {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  list-style: none;
  background: rgba(255, 255, 255, 0.03);
  padding: 0.3rem 0.4rem;
  border-radius: var(--radius-full);
  border: 1px solid var(--border-subtle);
}

[data-theme="light"] .nav-links {
  background: rgba(0, 0, 0, 0.03);
}

.nav-link {
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--text-secondary);
  padding: 0.45rem 1rem;
  border-radius: var(--radius-full);
  transition: all var(--transition-fast);
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  white-space: nowrap;
}

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

.nav-link.active {
  color: #ffffff;
  background: var(--accent-primary);
  box-shadow: 0 2px 10px rgba(99, 102, 241, 0.35);
}

.nav-link.highlight {
  color: #38bdf8;
  font-weight: 700;
}

/* Right Actions Cluster */
.nav-actions {
  display: flex;
  align-items: center;
  gap: 0.65rem;
}

/* Modern Pill Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  font-weight: 600;
  font-size: 0.92rem;
  padding: 0.65rem 1.35rem;
  border-radius: var(--radius-full);
  transition: all var(--transition-normal);
  white-space: nowrap;
  user-select: none;
}

.btn-primary {
  background: var(--accent-gradient);
  color: #ffffff;
  box-shadow: 0 4px 16px rgba(99, 102, 241, 0.38);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(99, 102, 241, 0.5);
  color: #ffffff;
}

.btn-secondary {
  background: var(--bg-card);
  color: var(--text-primary);
  border: 1px solid var(--border-subtle);
  backdrop-filter: blur(8px);
}

.btn-secondary:hover {
  background: var(--bg-card-hover);
  border-color: var(--border-glow);
  transform: translateY(-2px);
}

.btn-outline {
  background: transparent;
  color: var(--text-primary);
  border: 1px solid var(--border-subtle);
}

.btn-outline:hover {
  border-color: var(--accent-primary);
  color: var(--accent-primary);
  background: rgba(99, 102, 241, 0.08);
}

.btn-sm {
  padding: 0.45rem 0.95rem;
  font-size: 0.82rem;
  border-radius: var(--radius-full);
}

.btn-cbt-pulse {
  background: linear-gradient(135deg, #10b981 0%, #06b6d4 100%);
  color: #fff;
  font-weight: 700;
  box-shadow: 0 4px 18px rgba(16, 185, 129, 0.38);
}

.btn-cbt-pulse:hover {
  box-shadow: 0 6px 25px rgba(16, 185, 129, 0.55);
  transform: translateY(-2px);
  color: #fff;
}

/* Theme Toggle Button */
.theme-toggle-btn {
  width: 38px;
  height: 38px;
  border-radius: var(--radius-full);
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition-fast);
  cursor: pointer;
}

.theme-toggle-btn:hover {
  color: var(--text-primary);
  border-color: var(--border-glow);
  transform: scale(1.06);
}

/* Fullscreen Toggle Header Button */
.header-fs-btn {
  width: 38px;
  height: 38px;
  border-radius: var(--radius-full);
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition-fast);
  cursor: pointer;
}

.header-fs-btn:hover {
  color: var(--accent-primary);
  border-color: var(--border-glow);
  transform: scale(1.06);
}

/* Mobile Menu Toggle */
.mobile-menu-toggle {
  display: none;
  width: 40px;
  height: 40px;
  border-radius: var(--radius-sm);
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  color: var(--text-primary);
  align-items: center;
  justify-content: center;
  cursor: pointer;
}

/* Mobile Menu Drawer */
.mobile-nav-drawer {
  display: none;
  position: fixed;
  top: 70px;
  left: 0;
  right: 0;
  background: var(--bg-secondary);
  border-bottom: 1px solid var(--border-subtle);
  padding: 1.25rem 1.5rem 2rem;
  z-index: 99;
  box-shadow: var(--shadow-lg);
  backdrop-filter: blur(20px);
}

.mobile-nav-drawer.open {
  display: block;
  animation: slideDown 0.25s ease;
}

@keyframes slideDown {
  from { opacity: 0; transform: translateY(-10px); }
  to { opacity: 1; transform: translateY(0); }
}

.mobile-nav-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  margin-bottom: 1.5rem;
}

.mobile-nav-link {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.75rem 1rem;
  border-radius: var(--radius-md);
  font-weight: 600;
  color: var(--text-secondary);
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
}

.mobile-nav-link.active,
.mobile-nav-link:hover {
  color: var(--text-primary);
  border-color: var(--border-glow);
}

/* ===================================================================
   HERO SECTION - MINIMAL & EXPANSIVE
   =================================================================== */
.hero-section {
  position: relative;
  padding: 6.5rem 0 5rem;
  text-align: center;
  overflow: hidden;
}

.hero-glow-bg {
  position: absolute;
  top: -80px;
  left: 50%;
  transform: translateX(-50%);
  width: 1100px;
  height: 600px;
  background: var(--hero-glow);
  filter: blur(70px);
  pointer-events: none;
  z-index: 0;
}

.hero-content {
  position: relative;
  z-index: 1;
  max-width: 980px;
  margin: 0 auto;
}

.hero-pill {
  display: inline-flex;
  align-items: center;
  gap: 0.65rem;
  padding: 0.45rem 1.15rem;
  background: rgba(99, 102, 241, 0.1);
  border: 1px solid rgba(99, 102, 241, 0.25);
  border-radius: var(--radius-full);
  font-size: 0.82rem;
  font-weight: 700;
  color: var(--accent-primary);
  margin-bottom: 1.75rem;
  backdrop-filter: blur(12px);
  box-shadow: 0 2px 10px rgba(99, 102, 241, 0.15);
}

.pulse-dot {
  width: 8px;
  height: 8px;
  background: #10b981;
  border-radius: 50%;
  box-shadow: 0 0 10px #10b981;
  animation: pulse 2s infinite;
}

@keyframes pulse {
  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); }
}

.hero-title {
  font-size: 4rem;
  font-weight: 800;
  letter-spacing: -0.035em;
  line-height: 1.1;
  margin-bottom: 1.5rem;
}

.gradient-text {
  background: var(--accent-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  display: inline-block;
}

.hero-subtitle {
  font-size: 1.25rem;
  color: var(--text-secondary);
  max-width: 780px;
  margin: 0 auto 2.5rem;
  font-weight: 400;
  line-height: 1.6;
}

/* Floating Quick Search Bar in Hero */
.hero-search-box {
  max-width: 680px;
  margin: 0 auto;
  position: relative;
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-full);
  padding: 0.55rem 0.85rem 0.55rem 1.4rem;
  display: flex;
  align-items: center;
  gap: 0.85rem;
  box-shadow: var(--shadow-md);
  backdrop-filter: blur(16px);
  transition: all var(--transition-normal);
}

.hero-search-box:focus-within {
  border-color: var(--accent-primary);
  box-shadow: var(--shadow-glow);
  transform: translateY(-2px);
}

.hero-search-input {
  flex: 1;
  background: transparent;
  border: none;
  outline: none;
  color: var(--text-primary);
  font-size: 1.02rem;
  font-weight: 500;
}

.hero-search-input::placeholder {
  color: var(--text-muted);
}

.kbd-shortcut {
  font-size: 0.72rem;
  font-family: 'JetBrains Mono', monospace;
  font-weight: 600;
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid var(--border-subtle);
  color: var(--text-muted);
  padding: 0.25rem 0.55rem;
  border-radius: var(--radius-full);
}

.hero-actions {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.85rem;
  flex-wrap: wrap;
  margin-top: 2rem;
}

/* ===================================================================
   METRICS SECTION - HIGH IMPACT KPI STRIP
   =================================================================== */
.metrics-section {
  padding: 2.5rem 0;
  border-top: 1px solid var(--border-subtle);
  border-bottom: 1px solid var(--border-subtle);
  background: rgba(13, 18, 31, 0.4);
}

.metrics-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.5rem;
}

.metric-card {
  text-align: center;
  padding: 1.75rem 1.25rem;
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  backdrop-filter: blur(12px);
  position: relative;
  overflow: hidden;
  transition: all var(--transition-fast);
}

.metric-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--accent-gradient);
  opacity: 0;
  transition: opacity var(--transition-fast);
}

.metric-card:hover {
  transform: translateY(-3px);
  border-color: var(--border-glow);
  box-shadow: var(--shadow-sm);
}

.metric-card:hover::before {
  opacity: 1;
}

.metric-value {
  font-size: 2.6rem;
  font-family: 'Outfit', sans-serif;
  font-weight: 900;
  color: var(--text-primary);
  line-height: 1;
  margin-bottom: 0.4rem;
  letter-spacing: -0.03em;
}

.metric-label {
  font-size: 0.82rem;
  color: var(--text-muted);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

/* ===================================================================
   SECTION HEADERS
   =================================================================== */
.section-header {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  margin-bottom: 2.25rem;
  flex-wrap: wrap;
  gap: 1rem;
}

.section-tag {
  font-size: 0.78rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--accent-primary);
  margin-bottom: 0.35rem;
  display: block;
}

.section-title {
  font-size: 2.25rem;
  letter-spacing: -0.025em;
  font-weight: 800;
}

.section-subtitle {
  color: var(--text-secondary);
  font-size: 1.05rem;
  margin-top: 0.35rem;
  font-weight: 400;
}

/* ===================================================================
   FILTER BAR & CHIPS
   =================================================================== */
.filter-bar {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  overflow-x: auto;
  padding: 0.25rem 0.25rem 0.75rem;
  margin-bottom: 2rem;
  scrollbar-width: thin;
}

.filter-bar::-webkit-scrollbar {
  height: 4px;
}
.filter-bar::-webkit-scrollbar-thumb {
  background: var(--border-medium);
  border-radius: 4px;
}

.filter-chip {
  padding: 0.55rem 1.15rem;
  border-radius: var(--radius-full);
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  color: var(--text-secondary);
  font-size: 0.85rem;
  font-weight: 600;
  cursor: pointer;
  white-space: nowrap;
  transition: all var(--transition-fast);
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
}

.filter-chip:hover {
  color: var(--text-primary);
  border-color: var(--border-glow);
  transform: translateY(-1px);
}

.filter-chip.active {
  background: var(--accent-gradient);
  color: #fff;
  border-color: transparent;
  box-shadow: 0 4px 14px rgba(99, 102, 241, 0.35);
}

/* ===================================================================
   NOTES DIRECTORY GRID & CARDS
   =================================================================== */
.notes-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(380px, 1fr));
  gap: 1.75rem;
  margin-bottom: 4rem;
}

.note-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 2rem;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: all var(--transition-normal);
  position: relative;
  overflow: hidden;
  backdrop-filter: blur(16px);
}

.note-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--accent-gradient);
  opacity: 0;
  transition: opacity var(--transition-fast);
}

.note-card:hover {
  transform: translateY(-5px);
  border-color: var(--border-glow);
  box-shadow: var(--shadow-md);
  background: var(--bg-card-hover);
}

.note-card:hover::before {
  opacity: 1;
}

.note-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1.15rem;
}

.note-badge {
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  padding: 0.25rem 0.75rem;
  border-radius: var(--radius-full);
}

.badge-polity { background: var(--tag-polity-bg); color: var(--tag-polity); }
.badge-economy { background: var(--tag-economy-bg); color: var(--tag-economy); }
.badge-history { background: var(--tag-history-bg); color: var(--tag-history); }
.badge-env { background: var(--tag-env-bg); color: var(--tag-env); }
.badge-science { background: var(--tag-science-bg); color: var(--tag-science); }
.badge-reasoning { background: var(--tag-reasoning-bg); color: var(--tag-reasoning); }
.badge-quant { background: var(--tag-quant-bg); color: var(--tag-quant); }
.badge-heritage { background: var(--tag-heritage-bg); color: var(--tag-heritage); }
.badge-geography { background: var(--tag-geography-bg); color: var(--tag-geography); }
.badge-english { background: var(--tag-english-bg); color: var(--tag-english); }
.badge-gujarati { background: var(--tag-gujarati-bg); color: var(--tag-gujarati); }
.badge-current { background: var(--tag-current-bg); color: var(--tag-current); }

.note-date {
  font-size: 0.78rem;
  color: var(--text-muted);
  font-weight: 500;
}

.note-title {
  font-size: 1.35rem;
  line-height: 1.35;
  margin-bottom: 0.85rem;
  color: var(--text-primary);
  font-weight: 700;
  transition: color var(--transition-fast);
}

.note-card:hover .note-title {
  color: var(--accent-primary);
}

.note-desc {
  font-size: 0.94rem;
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: 1.35rem;
  flex: 1;
}

.note-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
  margin-bottom: 1.35rem;
}

.note-tag-item {
  font-size: 0.72rem;
  font-weight: 600;
  color: var(--text-muted);
  background: rgba(255, 255, 255, 0.05);
  padding: 0.25rem 0.6rem;
  border-radius: var(--radius-xs);
  border: 1px solid var(--border-subtle);
}

.note-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 1.15rem;
  border-top: 1px solid var(--border-subtle);
}

.note-meta-info {
  display: flex;
  align-items: center;
  gap: 0.95rem;
  font-size: 0.82rem;
  color: var(--text-muted);
  font-weight: 500;
}

.read-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  font-weight: 700;
  font-size: 0.88rem;
  color: var(--accent-primary);
  transition: all var(--transition-fast);
}

.note-card:hover .read-btn {
  gap: 0.75rem;
  color: var(--accent-secondary);
}

/* ===================================================================
   FEATURES HIGHLIGHTS
   =================================================================== */
.features-section {
  padding: 5.5rem 0;
  background: rgba(13, 18, 31, 0.35);
  border-top: 1px solid var(--border-subtle);
  border-bottom: 1px solid var(--border-subtle);
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
}

.feature-box {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 2.25rem;
  backdrop-filter: blur(16px);
  transition: all var(--transition-normal);
}

.feature-box:hover {
  transform: translateY(-5px);
  border-color: var(--border-glow);
  box-shadow: var(--shadow-md);
}

.feature-icon-wrapper {
  width: 52px;
  height: 52px;
  border-radius: var(--radius-md);
  background: var(--accent-gradient-glow);
  border: 1px solid rgba(99, 102, 241, 0.35);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent-primary);
  margin-bottom: 1.5rem;
}

.feature-title {
  font-size: 1.35rem;
  margin-bottom: 0.65rem;
}

.feature-text {
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.65;
}

/* ===================================================================
   WORKFLOW / HOW IT WORKS
   =================================================================== */
.workflow-section {
  padding: 5.5rem 0;
}

.workflow-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-xl);
  padding: 3rem;
  box-shadow: var(--shadow-lg);
  position: relative;
  overflow: hidden;
  backdrop-filter: blur(20px);
}

.workflow-steps {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2.5rem;
  margin-top: 2.5rem;
}

.workflow-step {
  position: relative;
}

.step-num {
  font-family: 'Outfit', sans-serif;
  font-size: 2.5rem;
  font-weight: 900;
  color: var(--accent-primary);
  margin-bottom: 0.75rem;
  display: inline-block;
  line-height: 1;
}

.step-title {
  font-size: 1.25rem;
  margin-bottom: 0.65rem;
}

.step-desc {
  font-size: 0.94rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

/* ===================================================================
   PRACTICE QUESTIONS SYSTEM - SLEEK & INTERACTIVE
   =================================================================== */

/* Score Tracker Bar */
.score-tracker-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 1.5rem 2rem;
  margin-bottom: 2rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1.5rem;
  box-shadow: var(--shadow-sm);
  backdrop-filter: blur(16px);
}

.score-stats-group {
  display: flex;
  align-items: center;
  gap: 2.5rem;
  flex-wrap: wrap;
}

.score-stat-item {
  display: flex;
  flex-direction: column;
}

.score-stat-label {
  font-size: 0.72rem;
  text-transform: uppercase;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--text-muted);
  margin-bottom: 0.2rem;
}

.score-stat-val {
  font-size: 1.75rem;
  font-weight: 900;
  font-family: 'JetBrains Mono', monospace;
  color: var(--text-primary);
  line-height: 1;
}

.score-stat-val.highlight-green {
  color: #10b981;
}

.score-progress-wrapper {
  flex: 1;
  min-width: 220px;
  max-width: 380px;
}

.score-progress-header {
  display: flex;
  justify-content: space-between;
  font-size: 0.8rem;
  margin-bottom: 0.5rem;
  color: var(--text-secondary);
  font-weight: 600;
}

.score-progress-track {
  width: 100%;
  height: 8px;
  background: rgba(255, 255, 255, 0.08);
  border-radius: var(--radius-full);
  overflow: hidden;
}

.score-progress-fill {
  height: 100%;
  width: 0%;
  background: var(--accent-gradient);
  border-radius: var(--radius-full);
  transition: width 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}

/* Topic Select & Toolbar Controls */
.questions-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
  margin-bottom: 1.75rem;
}

.topic-select-control {
  background: var(--bg-card);
  color: var(--text-primary);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-full);
  padding: 0.65rem 1.25rem;
  font-size: 0.9rem;
  font-weight: 600;
  outline: none;
  cursor: pointer;
  transition: all var(--transition-fast);
  min-width: 260px;
}

.topic-select-control:focus {
  border-color: var(--accent-primary);
  box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.2);
}

.toolbar-actions-group {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  flex-wrap: wrap;
}

/* Question Card */
.questions-list {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
  margin-bottom: 4rem;
}

.question-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 2rem;
  backdrop-filter: blur(16px);
  position: relative;
  overflow: hidden;
  transition: transform var(--transition-normal), border-color var(--transition-normal), box-shadow var(--transition-normal);
}

.question-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--accent-gradient);
  opacity: 0;
  transition: opacity var(--transition-fast);
}

.question-card:hover {
  border-color: var(--border-glow);
  box-shadow: var(--shadow-md);
}

.question-card.is-revealed::before,
.question-card:hover::before {
  opacity: 1;
}

.question-card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-bottom: 1.25rem;
}

.header-badges {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  flex-wrap: wrap;
}

.subtopic-pill {
  font-size: 0.75rem;
  font-weight: 600;
  padding: 0.25rem 0.75rem;
  border-radius: var(--radius-full);
  background: rgba(255, 255, 255, 0.05);
  color: var(--text-secondary);
  border: 1px solid var(--border-subtle);
}

.difficulty-pill {
  font-size: 0.7rem;
  font-weight: 700;
  padding: 0.2rem 0.6rem;
  border-radius: var(--radius-full);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.diff-easy { background: rgba(16, 185, 129, 0.14); color: #10b981; }
.diff-medium { background: rgba(245, 158, 11, 0.14); color: #f59e0b; }
.diff-hard { background: rgba(239, 68, 68, 0.14); color: #ef4444; }

.header-right-actions {
  display: flex;
  align-items: center;
  gap: 0.65rem;
}

.q-number {
  font-family: 'JetBrains Mono', monospace;
  font-weight: 700;
  font-size: 0.85rem;
  color: var(--accent-primary);
  background: rgba(99, 102, 241, 0.12);
  padding: 0.25rem 0.75rem;
  border-radius: var(--radius-full);
  border: 1px solid rgba(99, 102, 241, 0.25);
}

.bookmark-btn {
  background: transparent;
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-full);
  width: 36px;
  height: 36px;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition-fast);
  cursor: pointer;
}

.bookmark-btn:hover {
  color: #f59e0b;
  border-color: rgba(245, 158, 11, 0.4);
  transform: scale(1.1);
}

.bookmark-btn.active {
  color: #f59e0b;
  background: rgba(245, 158, 11, 0.14);
  border-color: rgba(245, 158, 11, 0.4);
}

/* Question Text */
.question-body {
  margin-bottom: 1.5rem;
}

.question-title-en {
  font-size: 1.2rem;
  line-height: 1.55;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 0.6rem;
}

.question-title-guj {
  font-size: 1.05rem;
  line-height: 1.65;
  color: #38bdf8;
  font-weight: 500;
}

/* Options Grid */
.practice-options-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 0.85rem;
  margin-bottom: 1.5rem;
}

.practice-option {
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 0.95rem 1.15rem;
  display: flex;
  align-items: center;
  gap: 0.85rem;
  cursor: pointer;
  transition: all var(--transition-fast);
  user-select: none;
  position: relative;
}

[data-theme="light"] .practice-option {
  background: rgba(0, 0, 0, 0.02);
}

.practice-option:hover {
  background: rgba(99, 102, 241, 0.08);
  border-color: var(--border-glow);
  transform: translateY(-2px);
}

.option-key-badge {
  width: 32px;
  height: 32px;
  min-width: 32px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.08);
  font-weight: 800;
  font-size: 0.85rem;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-primary);
  transition: all var(--transition-fast);
}

[data-theme="light"] .option-key-badge {
  background: rgba(0, 0, 0, 0.06);
}

.option-text {
  flex: 1;
  font-size: 0.98rem;
  color: var(--text-primary);
  line-height: 1.45;
}

/* Option States */
.practice-option.is-correct {
  background: rgba(16, 185, 129, 0.14) !important;
  border-color: #10b981 !important;
  box-shadow: 0 0 18px rgba(16, 185, 129, 0.22);
}

.practice-option.is-correct .option-key-badge {
  background: #10b981;
  color: #ffffff;
}

.practice-option.is-wrong {
  background: rgba(239, 68, 68, 0.14) !important;
  border-color: #ef4444 !important;
  box-shadow: 0 0 18px rgba(239, 68, 68, 0.22);
}

.practice-option.is-wrong .option-key-badge {
  background: #ef4444;
  color: #ffffff;
}

.opt-indicator {
  font-size: 0.72rem;
  font-weight: 700;
  padding: 0.2rem 0.6rem;
  border-radius: var(--radius-full);
}

.opt-indicator.correct {
  background: #10b981;
  color: #fff;
}

.opt-indicator.wrong {
  background: #ef4444;
  color: #fff;
}

/* Question Footer Actions */
.question-card-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 0.75rem;
  padding-top: 1.15rem;
  border-top: 1px solid var(--border-subtle);
}

/* SHOW ANSWER BUTTON */
.btn-show-ans {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  font-weight: 700;
  font-size: 0.9rem;
  padding: 0.65rem 1.35rem;
  border-radius: var(--radius-full);
  background: rgba(99, 102, 241, 0.12);
  color: var(--accent-primary);
  border: 1px solid rgba(99, 102, 241, 0.3);
  transition: all var(--transition-fast);
  cursor: pointer;
}

.btn-show-ans:hover {
  background: var(--accent-gradient);
  color: #ffffff;
  border-color: transparent;
  transform: translateY(-2px);
  box-shadow: 0 4px 16px rgba(99, 102, 241, 0.4);
}

.btn-show-ans.active {
  background: rgba(139, 92, 246, 0.18);
  color: var(--accent-tertiary);
  border-color: rgba(139, 92, 246, 0.4);
}

.btn-retry-q {
  font-size: 0.82rem;
  font-weight: 600;
  padding: 0.45rem 0.95rem;
  border-radius: var(--radius-full);
  background: transparent;
  border: 1px solid var(--border-subtle);
  color: var(--text-muted);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.btn-retry-q:hover {
  color: var(--text-primary);
  border-color: var(--border-glow);
}

/* Answer Accordion / Reveal Panel */
.answer-box-accordion {
  max-height: 0;
  overflow: hidden;
  opacity: 0;
  transition: max-height 0.4s cubic-bezier(0, 1, 0, 1), opacity 0.3s ease;
}

.answer-box-accordion.is-open {
  max-height: 1400px;
  opacity: 1;
  margin-top: 1.25rem;
}

.answer-box-inner {
  background: rgba(13, 18, 31, 0.65);
  border: 1px solid rgba(99, 102, 241, 0.28);
  border-radius: var(--radius-md);
  padding: 1.5rem;
  box-shadow: inset 0 1px 3px rgba(0, 0, 0, 0.2);
}

[data-theme="light"] .answer-box-inner {
  background: rgba(241, 245, 249, 0.9);
  border-color: rgba(99, 102, 241, 0.2);
}

.correct-answer-banner {
  display: flex;
  align-items: center;
  gap: 0.85rem;
  flex-wrap: wrap;
  margin-bottom: 1rem;
  padding-bottom: 0.85rem;
  border-bottom: 1px dashed var(--border-subtle);
}

.correct-badge-pill {
  background: #10b981;
  color: #ffffff;
  font-size: 0.75rem;
  font-weight: 700;
  padding: 0.25rem 0.75rem;
  border-radius: var(--radius-full);
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.answer-highlight {
  font-size: 1.1rem;
  color: var(--text-primary);
  font-weight: 600;
}

.explanation-section {
  margin-bottom: 1rem;
}

.explanation-heading {
  font-size: 0.92rem;
  color: var(--accent-primary);
  margin-bottom: 0.45rem;
  font-weight: 700;
}

.explanation-text {
  font-size: 0.96rem;
  line-height: 1.68;
  color: var(--text-secondary);
}

.shortcut-trick-banner {
  display: flex;
  gap: 0.85rem;
  align-items: flex-start;
  background: rgba(245, 158, 11, 0.1);
  border: 1px solid rgba(245, 158, 11, 0.3);
  border-radius: var(--radius-sm);
  padding: 1rem 1.15rem;
  font-size: 0.92rem;
  color: var(--text-primary);
  margin-top: 1rem;
}

.trick-icon {
  font-size: 1.35rem;
  line-height: 1;
}

/* ===================================================================
   MODALS - GLASSMORPHIC CARDS
   =================================================================== */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.78);
  backdrop-filter: blur(16px);
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1.5rem;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--transition-normal);
}

.modal-overlay.active {
  opacity: 1;
  pointer-events: auto;
}

.modal-container {
  background: var(--bg-secondary);
  border: 1px solid var(--border-glow);
  border-radius: var(--radius-xl);
  max-width: 720px;
  width: 100%;
  max-height: 90vh;
  overflow-y: auto;
  box-shadow: var(--shadow-lg), 0 0 50px rgba(99, 102, 241, 0.2);
  transform: translateY(20px);
  transition: transform var(--transition-normal);
}

.modal-overlay.active .modal-container {
  transform: translateY(0);
}

.modal-header {
  padding: 1.5rem 2rem;
  border-bottom: 1px solid var(--border-subtle);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.modal-body {
  padding: 2rem;
}

.modal-footer {
  padding: 1.25rem 2rem;
  border-top: 1px solid var(--border-subtle);
  display: flex;
  justify-content: flex-end;
  gap: 0.75rem;
  background: rgba(0, 0, 0, 0.1);
}

/* Form Styles */
.form-group {
  margin-bottom: 1.25rem;
}

.form-label {
  display: block;
  font-size: 0.85rem;
  font-weight: 700;
  margin-bottom: 0.45rem;
  color: var(--text-secondary);
}

.form-control {
  width: 100%;
  padding: 0.75rem 1rem;
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  color: var(--text-primary);
  font-size: 0.95rem;
  outline: none;
  transition: border-color var(--transition-fast);
}

.form-control:focus {
  border-color: var(--accent-primary);
  box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.25);
}

textarea.form-control {
  min-height: 140px;
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.85rem;
  resize: vertical;
}

/* ===================================================================
   NOTE READER VIEW
   =================================================================== */
.reader-wrapper {
  max-width: 980px;
  margin: 0 auto;
  padding: 3rem 1.5rem 7rem;
}

.reader-header {
  margin-bottom: 3rem;
  padding-bottom: 1.5rem;
  border-bottom: 1px solid var(--border-subtle);
}

.reader-title {
  font-size: 3rem;
  margin-bottom: 1.25rem;
  line-height: 1.15;
}

.reader-meta-bar {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  color: var(--text-muted);
  font-size: 0.92rem;
  flex-wrap: wrap;
}

.ai-note-article {
  font-size: 1.12rem;
  line-height: 1.85;
  color: var(--text-primary);
}

.ai-note-article h2 {
  font-size: 1.95rem;
  margin: 2.75rem 0 1.25rem;
  padding-bottom: 0.5rem;
  border-bottom: 1px solid var(--border-subtle);
  color: var(--text-primary);
}

.ai-note-article h3 {
  font-size: 1.45rem;
  margin: 2.25rem 0 0.85rem;
  color: var(--accent-primary);
}

.ai-note-article p {
  margin-bottom: 1.35rem;
  color: var(--text-secondary);
}

.ai-note-article ul, .ai-note-article ol {
  margin-bottom: 1.6rem;
  padding-left: 1.75rem;
  color: var(--text-secondary);
}

.ai-note-article li {
  margin-bottom: 0.55rem;
}

.ai-note-article table {
  width: 100%;
  border-collapse: collapse;
  margin: 2rem 0;
  font-size: 0.95rem;
  background: var(--bg-card);
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 1px solid var(--border-subtle);
}

.ai-note-article th {
  background: rgba(99, 102, 241, 0.12);
  color: var(--text-primary);
  font-weight: 700;
  text-align: left;
  padding: 0.9rem 1.2rem;
  border-bottom: 1px solid var(--border-subtle);
}

.ai-note-article td {
  padding: 0.85rem 1.2rem;
  border-bottom: 1px solid var(--border-subtle);
  color: var(--text-secondary);
}

.ai-note-article .key-takeaway {
  background: rgba(16, 185, 129, 0.08);
  border: 1px solid rgba(16, 185, 129, 0.28);
  border-radius: var(--radius-md);
  padding: 1.35rem 1.6rem;
  margin: 1.75rem 0;
}

.ai-note-article .key-takeaway h4 {
  color: #10b981;
  margin-bottom: 0.5rem;
}

.topic-index-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 0.85rem;
  margin: 1.75rem 0 3rem;
}

.topic-index-pill {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.75rem 1rem;
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  color: var(--text-secondary);
  font-size: 0.9rem;
  transition: all var(--transition-fast);
}

.topic-index-pill:hover {
  border-color: var(--border-glow);
  color: var(--accent-primary);
  transform: translateY(-2px);
  background: var(--bg-card-hover);
}

/* ===================================================================
   FOOTER
   =================================================================== */
.footer {
  border-top: 1px solid var(--border-subtle);
  padding: 4.5rem 0 2.5rem;
  background: var(--bg-secondary);
}

.footer-content {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1.5rem;
  margin-bottom: 2rem;
}

.footer-bottom {
  border-top: 1px solid var(--border-subtle);
  padding-top: 1.75rem;
  text-align: center;
  font-size: 0.85rem;
  color: var(--text-muted);
}

/* Empty State */
.empty-state {
  text-align: center;
  padding: 4.5rem 1.5rem;
  color: var(--text-muted);
}

.empty-state svg {
  margin-bottom: 1rem;
  opacity: 0.5;
}

/* ===================================================================
   RESPONSIVENESS
   =================================================================== */
@media (max-width: 1024px) {
  .hero-title { font-size: 3.2rem; }
  .metrics-grid { grid-template-columns: repeat(2, 1fr); }
  .features-grid { grid-template-columns: 1fr; }
  .workflow-steps { grid-template-columns: 1fr; gap: 1.75rem; }
}

@media (max-width: 860px) {
  .nav-links { display: none; }
  .mobile-menu-toggle { display: flex; }
  .hero-title { font-size: 2.6rem; }
  .hero-subtitle { font-size: 1.1rem; }
  .notes-grid { grid-template-columns: 1fr; }
}

@media (max-width: 640px) {
  .hero-title { font-size: 2.15rem; }
  .metrics-grid { grid-template-columns: 1fr; }
  .score-stats-group { gap: 1.25rem; }
  .score-stat-val { font-size: 1.4rem; }
  .reader-title { font-size: 2.2rem; }
}