:root {
  --bg: #FAF7F2;
  --bg-warm: #F4EFE6;
  --card: #FFFFFF;
  --card-tinted: #FDFBF7;
  --ink: #11241C;
  --ink-muted: #4B6357;
  --ink-subtle: #798E83;
  --primary: #0D4A38;
  --primary-dark: #072B20;
  --primary-light: #16684F;
  --primary-soft: #E8F2EE;
  --gold: #B88E38;
  --gold-dark: #8F691E;
  --gold-light: #EFE4C4;
  --gold-soft: #FAF4E4;
  --line: #E5DCB7;
  --line-light: #F0EAD6;
  --line-dark: #D4C79B;
  --shadow-sm: 0 2px 8px -2px rgba(13, 74, 56, 0.08);
  --shadow-md: 0 12px 24px -10px rgba(13, 74, 56, 0.12), 0 4px 10px -4px rgba(13, 74, 56, 0.05);
  --shadow-lg: 0 24px 48px -16px rgba(7, 43, 32, 0.22), 0 8px 16px -6px rgba(184, 142, 56, 0.15);
}

* {
  -webkit-tap-highlight-color: transparent;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  background: var(--bg);
  color: var(--ink);
  font-family: 'Hind Siliguri', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  line-height: 1.6;
}

.font-serif-bn {
  font-family: 'Noto Serif Bengali', serif;
}

.font-arabic {
  font-family: 'Amiri', serif;
}

:focus-visible {
  outline: 2px solid var(--gold);
  outline-offset: 2px;
}

/* Header styling with backdrop blur and gold line */
.header-bar {
  background: rgba(250, 247, 242, 0.94);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line);
}

.pattern-border {
  height: 8px;
  background-image: repeating-linear-gradient(
    135deg,
    var(--gold) 0 4px,
    transparent 4px 14px,
    var(--primary-light) 14px 18px,
    transparent 18px 28px
  );
  opacity: 0.75;
}

/* Islamic Geometric Background Pattern */
.hero-pattern {
  position: absolute;
  inset: 0;
  background-image: 
    radial-gradient(circle at 1px 1px, var(--gold) 1.2px, transparent 1.6px),
    linear-gradient(to right, rgba(184, 142, 56, 0.04) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(184, 142, 56, 0.04) 1px, transparent 1px);
  background-size: 32px 32px;
  opacity: 0.22;
  mask-image: linear-gradient(180deg, black 60%, transparent 98%);
  pointer-events: none;
}

.hero-pattern-sm {
  opacity: 0.15;
}

/* Mihrab Arch Top for the Auth Card */
.mihrab-card {
  position: relative;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 40px 40px 16px 16px;
  box-shadow: var(--shadow-lg);
  overflow: hidden;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.mihrab-crown {
  position: relative;
  height: 38px;
  background: linear-gradient(180deg, var(--gold-soft) 0%, rgba(250, 244, 228, 0.3) 100%);
  border-bottom: 1px solid var(--line-light);
  display: flex;
  align-items: center;
  justify-content: center;
}

.mihrab-crown::before {
  content: "";
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 64px;
  height: 14px;
  border-radius: 0 0 30px 30px;
  background: var(--gold);
  opacity: 0.45;
}

/* Typography highlights */
.brand-underline {
  position: relative;
  display: inline-block;
  white-space: nowrap;
}

.brand-underline::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: -0.15em;
  height: 0.18em;
  background: linear-gradient(90deg, var(--gold), var(--gold-light));
  opacity: 0.85;
  border-radius: 2px;
}

/* Filter Chips */
.chip {
  border: 1px solid var(--line);
  color: var(--ink-muted);
  background: var(--card);
  font-weight: 500;
  box-shadow: var(--shadow-sm);
  transition: all 0.2s cubic-bezier(0.16, 1, 0.3, 1);
}

.chip[aria-pressed="true"] {
  background: var(--primary);
  border-color: var(--primary-dark);
  color: #FFFFFF;
  box-shadow: 0 4px 12px -2px rgba(13, 74, 56, 0.35);
}

.chip:hover:not([aria-pressed="true"]) {
  border-color: var(--gold);
  color: var(--primary-dark);
  background: var(--gold-soft);
  transform: translateY(-1px);
}

/* Class Video Card */
.class-card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 14px;
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: all 0.25s cubic-bezier(0.16, 1, 0.3, 1);
  display: flex;
  flex-direction: column;
}

.class-card:hover {
  border-color: var(--gold);
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}

.thumb-wrap {
  aspect-ratio: 16/9;
  position: relative;
  overflow: hidden;
  background: #08281F;
}

.thumb-wrap img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.4s ease;
}

.class-card:hover .thumb-wrap img {
  transform: scale(1.05);
}

.play-badge {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(0deg, rgba(7, 43, 32, 0.6) 0%, rgba(7, 43, 32, 0.1) 60%, transparent 100%);
  transition: background 0.2s ease;
}

.thumb-wrap:hover .play-badge {
  background: linear-gradient(0deg, rgba(7, 43, 32, 0.75) 0%, rgba(7, 43, 32, 0.25) 60%, transparent 100%);
}

.play-circle {
  width: 52px;
  height: 52px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.96);
  display: flex;
  align-items: center;
  justify-content: center;
  border: 2px solid var(--gold-light);
  box-shadow: 0 8px 20px rgba(0, 0, 0, 0.3);
  transition: transform 0.2s cubic-bezier(0.16, 1, 0.3, 1), background 0.2s ease;
}

.thumb-wrap:hover .play-circle {
  transform: scale(1.12);
  background: #FFFFFF;
  border-color: var(--gold);
}

/* Modal styling */
#playerModal[data-open="false"] {
  display: none;
}

.modal-panel {
  background: var(--card);
  box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
  animation: modalEnter 0.25s cubic-bezier(0.16, 1, 0.3, 1);
}

@keyframes modalEnter {
  from {
    opacity: 0;
    transform: scale(0.96) translateY(8px);
  }
  to {
    opacity: 1;
    transform: scale(1) translateY(0);
  }
}

.no-scrollbar::-webkit-scrollbar {
  display: none;
}
.no-scrollbar {
  -ms-overflow-style: none;
  scrollbar-width: none;
}

.line-clamp-2 {
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

/* Button & interactive effects */
.btn-primary {
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
  color: #FFFFFF;
  font-weight: 600;
  transition: all 0.2s ease;
  box-shadow: 0 4px 12px -2px rgba(13, 74, 56, 0.3);
}

.btn-primary:hover {
  background: linear-gradient(135deg, var(--primary-light) 0%, var(--primary) 100%);
  transform: translateY(-1px);
  box-shadow: 0 6px 16px -2px rgba(13, 74, 56, 0.4);
}

.btn-secondary {
  background: var(--card);
  border: 1px solid var(--line);
  color: var(--ink);
  font-weight: 500;
  transition: all 0.2s ease;
}

.btn-secondary:hover {
  border-color: var(--gold);
  background: var(--gold-soft);
  color: var(--primary-dark);
}

.btn-danger {
  background: #DC2626;
  color: #FFFFFF;
  font-weight: 600;
  transition: all 0.2s ease;
}

.btn-danger:hover {
  background: #B91C1C;
}

/* Auth Navigation Tabs */
.auth-tab {
  padding: 10px 16px;
  font-weight: 600;
  font-size: 0.875rem;
  color: var(--ink-muted);
  border-bottom: 2px solid transparent;
  transition: all 0.2s ease;
}

.auth-tab[aria-selected="true"] {
  color: var(--primary-dark);
  border-bottom-color: var(--primary);
  background: rgba(13, 74, 56, 0.04);
}

.auth-tab:hover:not([aria-selected="true"]) {
  color: var(--primary);
  background: var(--gold-soft);
}

/* Admin Tab Styling */
.admin-tab-btn {
  padding: 8px 16px;
  border-radius: 10px;
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--ink-muted);
  border: 1px solid transparent;
  transition: all 0.15s ease;
}

.admin-tab-btn[aria-selected="true"] {
  background: var(--primary);
  color: #FFFFFF;
  box-shadow: 0 4px 12px -2px rgba(13, 74, 56, 0.35);
}

.admin-tab-btn:hover:not([aria-selected="true"]) {
  background: var(--gold-soft);
  color: var(--primary-dark);
  border-color: var(--line);
}

/* Status Badges */
.badge-active {
  background: #ECFDF5;
  color: #047857;
  border: 1px solid #A7F3D0;
}

.badge-pending {
  background: #FFFBEB;
  color: #B45309;
  border: 1px solid #FDE68A;
}

.badge-blocked {
  background: #FEF2F2;
  color: #B91C1C;
  border: 1px solid #FECACA;
}

/* Device chip */
.device-chip {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 2px 8px;
  border-radius: 6px;
  font-size: 11px;
  font-weight: 500;
  background: var(--card-tinted);
  border: 1px solid var(--line);
}

.device-chip.active {
  border-color: #10B981;
  color: #065F46;
  background: #ECFDF5;
}

/* Feature pill / badge */
.feature-pill {
  background: rgba(255, 255, 255, 0.8);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 12px 16px;
  transition: all 0.2s ease;
}

.feature-pill:hover {
  background: #FFFFFF;
  border-color: var(--gold);
  transform: translateX(4px);
  box-shadow: var(--shadow-sm);
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
  .class-card:hover {
    transform: none;
  }
  .feature-pill:hover {
    transform: none;
  }
}