/* ============================================================
   BIU Legal Hub — "Obsidian Gold" Premium Design System
   ============================================================ */

:root {
  /* ── Background & Surface ── */
  --midnight: #060B15;
  --slate-800: #111C30;
  --slate-900: #0A1222;
  --slate-900-50: rgba(8, 16, 32, 0.65);

  /* ── Gold Spectrum ── */
  --gold: #C5A55A;
  --gold-heading: #D4AF37;
  --gold-light: #DEC079;
  --gold-glow: rgba(197, 165, 90, 0.12);
  --gold-border: rgba(197, 165, 90, 0.10);

  /* ── Text ── */
  --navy: #E8E6E1;
  --navy-muted: #94A3B8;
  --body-text: #8892A2;
  --white: #FFFFFF;

  /* ── Grays ── */
  --gray-100: #111C30;
  --gray-200: #1A2840;
  --gray-400: #7E8A9A;
  --gray-500: #7E8A9A;
  --gray-700: #E2E8F0;

  /* ── Cards ── */
  --card-bg: rgba(10, 18, 34, 0.72);
  --glass-card: rgba(10, 18, 34, 0.6);

  /* ── Shadows ── */
  --shadow-sm: 0 2px 8px rgba(0,0,0,0.35), 0 0 0 1px var(--gold-border);
  --shadow-md: 0 12px 40px rgba(0,0,0,0.45), 0 0 0 1px var(--gold-border);
  --shadow-lg: 0 28px 72px rgba(0,0,0,0.55), 0 0 64px var(--gold-glow);

  /* ── Radius ── */
  --radius: 16px;
  --radius-lg: 24px;
  --radius-xl: 1.5rem;
  --radius-3xl: 1.875rem;

  /* ── Easing ── */
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-spring: cubic-bezier(0.34, 1.56, 0.64, 1);

  /* ── Transitions ── */
  --transition: all 0.4s var(--ease);
  --transition-slow: all 0.6s var(--ease-out);

  /* ── Theme-aware (dark default) ── */
  --theme-bg: #060B15;
  --theme-card: rgba(10, 18, 34, 0.72);
  --theme-heading: #D4AF37;
  --theme-body: #8892A2;
  --theme-nav-bg: rgba(6, 11, 21, 0.88);
  --theme-nav-border: rgba(197, 165, 90, 0.08);
  --theme-card-shadow: 0 12px 40px rgba(0,0,0,0.45);
  --theme-input-bg: rgba(255,255,255,0.04);
  --theme-input-border: rgba(255,255,255,0.08);

  /* ── Typography ── */
  --font-body: 'Assistant', 'Heebo', sans-serif;
  --font-heading: 'Frank Ruhl Libre', 'Playfair Display', serif;
}

/* ── Light Theme ── */
[data-theme="light"] {
  --theme-bg: #FAF7F2;
  --theme-card: #FFFFFF;
  --theme-heading: #0D1B2A;
  --theme-body: #4A5568;
  --theme-nav-bg: rgba(250, 247, 242, 0.96);
  --theme-nav-border: rgba(0,0,0,0.06);
  --theme-card-shadow: 0 4px 24px rgba(0,0,0,0.06);
  --theme-input-bg: #FFFFFF;
  --theme-input-border: rgba(0,0,0,0.10);
  --card-bg: #FFFFFF;
  --navy: #0D1B2A;
  --gray-400: #64748b;
  --gray-200: #E2E8F0;
  --gold-heading: #8B6914;
  --body-text: #4A5568;
  --glass-card: #FFFFFF;
  --shadow-sm: 0 2px 12px rgba(0,0,0,0.05);
  --shadow-md: 0 8px 32px rgba(0,0,0,0.07);
  --shadow-lg: 0 20px 56px rgba(0,0,0,0.10);
  --font-body: 'Heebo', 'Assistant', sans-serif;
  --font-heading: 'Frank Ruhl Libre', serif;
}


/* ============================================================
   BASE & RESET
   ============================================================ */
* { margin: 0; padding: 0; box-sizing: border-box; }

html {
  overflow-x: hidden;
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.7;
  background: var(--theme-bg) !important;
  color: var(--theme-body);
  direction: rtl;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  transition: background-color 0.5s var(--ease), color 0.5s var(--ease);
}

/* Noise grain overlay for depth */
body::after {
  content: '';
  position: fixed;
  inset: 0;
  z-index: 10000;
  pointer-events: none;
  opacity: 0.022;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 512 512' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.75' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
  background-repeat: repeat;
  background-size: 256px;
}
[data-theme="light"] body::after { opacity: 0.012; }

/* Custom scrollbar */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: rgba(197,165,90,0.25); border-radius: 99px; }
::-webkit-scrollbar-thumb:hover { background: rgba(197,165,90,0.45); }
[data-theme="light"] ::-webkit-scrollbar-thumb { background: rgba(0,0,0,0.15); }
[data-theme="light"] ::-webkit-scrollbar-thumb:hover { background: rgba(0,0,0,0.25); }


/* ============================================================
   ANIMATIONS & KEYFRAMES
   ============================================================ */
.animate-fade-in {
  animation: fadeIn 0.7s var(--ease-out) forwards;
}
@keyframes fadeIn {
  from { opacity: 0; transform: translateY(16px); }
  to   { opacity: 1; transform: translateY(0); }
}

@keyframes fadeUp {
  from { opacity: 0; transform: translateY(24px); }
  to   { opacity: 1; transform: translateY(0); }
}

@keyframes shimmerBorder {
  0%   { background-position: 200% 0; }
  100% { background-position: -200% 0; }
}

@keyframes heroGlow {
  0%, 100% { opacity: 0.6; transform: scale(1); }
  50%      { opacity: 1;   transform: scale(1.08); }
}

@keyframes float {
  0%, 100% { transform: translateY(0); }
  50%      { transform: translateY(-8px); }
}

@keyframes bounce {
  0%, 100% { transform: rotate(45deg) translate(0,0); }
  50%      { transform: rotate(45deg) translate(4px,4px); }
}

@keyframes pulse-ring {
  0%   { transform: scale(0.92); opacity: 0.7; }
  100% { transform: scale(1.5);  opacity: 0; }
}

@keyframes sparkle {
  0%, 100% { transform: scale(1) rotate(0deg); }
  50%      { transform: scale(1.25) rotate(12deg); }
}

@keyframes shimmer {
  0%   { background-position: 200% 0; }
  100% { background-position: -200% 0; }
}

@keyframes gradientShift {
  0%   { background-position: 0% 50%; }
  50%  { background-position: 100% 50%; }
  100% { background-position: 0% 50%; }
}


/* ============================================================
   DARK CARD — Glass + Animated Shimmer Border
   ============================================================ */
.dark-card {
  background: var(--theme-card);
  backdrop-filter: blur(20px) saturate(1.3);
  -webkit-backdrop-filter: blur(20px) saturate(1.3);
  border-radius: var(--radius-3xl);
  border: 1px solid rgba(197, 165, 90, 0.08);
  box-shadow: var(--theme-card-shadow);
  position: relative;
  overflow: hidden;
  transition: background 0.5s var(--ease), border-color 0.5s var(--ease), box-shadow 0.5s var(--ease);
}

/* Animated gold shimmer on card border */
.dark-card::before {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: inherit;
  padding: 1px;
  background: linear-gradient(
    90deg,
    transparent 0%,
    transparent 30%,
    rgba(197, 165, 90, 0.35) 50%,
    transparent 70%,
    transparent 100%
  );
  background-size: 300% 100%;
  animation: shimmerBorder 6s ease-in-out infinite;
  -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
  -webkit-mask-composite: xor;
  mask-composite: exclude;
  pointer-events: none;
  z-index: 1;
}

[data-theme="light"] .dark-card {
  border-color: rgba(0,0,0,0.05);
  box-shadow: var(--theme-card-shadow);
}
[data-theme="light"] .dark-card::before {
  background: linear-gradient(
    90deg,
    transparent 0%,
    transparent 30%,
    rgba(139, 105, 20, 0.15) 50%,
    transparent 70%,
    transparent 100%
  );
  background-size: 300% 100%;
  animation: shimmerBorder 8s ease-in-out infinite;
}


.course-card-hover {
  transition: transform 0.4s var(--ease), box-shadow 0.4s var(--ease);
}
.course-card-hover:hover {
  transform: scale(1.04) translateY(-4px);
  box-shadow: var(--shadow-lg);
}

/* Touch-friendly */
button, .nav-toggle, a[href], [role="button"], .course-tab-btn, .course-pag-btn, .course-pag-num, .course-tbl-btn, .course-tbl-dl, .btn-icon, .btn-download, .category-card, .trending-tag, .touch-manipulation {
  touch-action: manipulation;
  -webkit-tap-highlight-color: rgba(197,160,89,0.15);
}


/* ============================================================
   NAVBAR
   ============================================================ */
nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  background: var(--theme-nav-bg);
  backdrop-filter: blur(24px) saturate(1.4);
  -webkit-backdrop-filter: blur(24px) saturate(1.4);
  border-bottom: 1px solid var(--theme-nav-border);
  padding: 0 2.5rem;
  height: 64px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  transition: background 0.5s var(--ease), border-color 0.5s var(--ease), box-shadow 0.5s var(--ease);
}

/* Gold glow line under nav */
nav::after {
  content: '';
  position: absolute;
  bottom: -1px; left: 10%; right: 10%;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(197,165,90,0.25), transparent);
  pointer-events: none;
}

.nav-brand { display: flex; align-items: center; gap: 1rem; }

.nav-title {
  font-family: var(--font-heading);
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--theme-body);
  letter-spacing: -0.02em;
  text-decoration: none;
}
[data-theme="dark"] .nav-title { color: #E8E6E1; }
.nav-title span { color: var(--gold-heading); }
.nav-subtitle { color: var(--theme-body); opacity: 0.8; font-family: var(--font-body); }

.nav-links { display: flex; align-items: center; gap: 2.25rem; list-style: none; }
.nav-links a {
  font-family: var(--font-body);
  text-decoration: none;
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--theme-body);
  transition: color 0.3s var(--ease);
  position: relative;
}
/* Animated underline on hover */
.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -4px; left: 0; right: 0;
  height: 2px;
  background: var(--gold-heading);
  border-radius: 1px;
  transform: scaleX(0);
  transform-origin: center;
  transition: transform 0.3s var(--ease);
}
.nav-links a:hover::after, .nav-links a.active::after { transform: scaleX(1); }

[data-theme="dark"] .nav-links a { color: rgba(232,230,225,0.8); }
.nav-links a:hover, .nav-links a.active { color: var(--theme-heading); }
[data-theme="dark"] .nav-links a:hover, [data-theme="dark"] .nav-links a.active { color: #E8E6E1; }

.nav-admin {
  background: linear-gradient(135deg, var(--gold), var(--gold-light));
  color: #060B15 !important;
  padding: 0.5rem 1.25rem;
  border-radius: 12px;
  font-size: 0.8rem !important;
  font-weight: 700;
  letter-spacing: 0.02em;
  transition: var(--transition);
  box-shadow: 0 2px 12px rgba(197,165,90,0.2);
}
.nav-admin::after { display: none; }
.nav-admin:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 24px rgba(197,165,90,0.35);
}

.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  padding: 10px;
  background: rgba(255,255,255,0.06);
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: 12px;
  cursor: pointer;
  transition: var(--transition);
}
.nav-toggle span,
.nav-toggle-bar {
  display: block;
  width: 20px;
  height: 2px;
  background: var(--theme-body);
  border-radius: 1px;
  transition: var(--transition);
}
[data-theme="dark"] .nav-toggle span,
[data-theme="dark"] .nav-toggle-bar { background: #E8E6E1; }
.nav-toggle:hover { background: rgba(255,255,255,0.1); }
.nav-toggle[aria-expanded="true"] span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded="true"] span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

.nav-backdrop {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.5);
  z-index: 98;
  top: 64px;
  cursor: pointer;
  -webkit-tap-highlight-color: transparent;
}
@media (min-width: 1024px) { .nav-backdrop { display: none !important; } }


/* ============================================================
   HERO — Mesh Gradient + Glow Orb
   ============================================================ */
.hero {
  min-height: auto;
  background:
    radial-gradient(ellipse 90% 45% at 50% -5%, rgba(197,165,90,0.10) 0%, transparent 55%),
    radial-gradient(ellipse 60% 60% at 80% 40%, rgba(10,18,50,0.8) 0%, transparent 55%),
    radial-gradient(ellipse 60% 60% at 15% 70%, rgba(8,14,40,0.7) 0%, transparent 55%),
    linear-gradient(180deg, #060B15 0%, #0A1222 40%, #0D1830 70%, #060B15 100%);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 0;
  position: relative;
  overflow: hidden;
}

/* Golden glow orb behind hero content */
.hero::before {
  content: '';
  position: absolute;
  width: 600px;
  height: 400px;
  top: 5%;
  left: 50%;
  transform: translateX(-50%);
  background: radial-gradient(ellipse, rgba(197,165,90,0.08) 0%, transparent 70%);
  animation: heroGlow 6s ease-in-out infinite;
  pointer-events: none;
}

/* Subtle floating particles */
.hero::after {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    radial-gradient(1.5px 1.5px at 20% 30%, rgba(197,165,90,0.3) 50%, transparent 50%),
    radial-gradient(1px 1px at 80% 20%, rgba(197,165,90,0.2) 50%, transparent 50%),
    radial-gradient(1.5px 1.5px at 60% 80%, rgba(197,165,90,0.2) 50%, transparent 50%),
    radial-gradient(1px 1px at 40% 60%, rgba(197,165,90,0.15) 50%, transparent 50%),
    radial-gradient(1px 1px at 90% 70%, rgba(197,165,90,0.2) 50%, transparent 50%);
  animation: float 8s ease-in-out infinite;
  pointer-events: none;
}

.hero-content {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  position: relative;
  z-index: 2;
  width: 100%;
  max-width: 44rem;
}

.hero-logo {
  object-fit: contain;
  border-radius: 16px;
  margin-bottom: 1.75rem;
  filter: brightness(1.05) drop-shadow(0 4px 24px rgba(197,165,90,0.15));
}

.hero-badge {
  font-family: var(--font-body);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  margin-bottom: 1.25rem;
  color: var(--gold-light);
  line-height: 1.6;
  opacity: 0.85;
}

.hero-title {
  font-family: var(--font-heading);
  font-size: clamp(2.8rem, 6vw, 4.5rem);
  font-weight: 700;
  line-height: 1.15;
  margin-bottom: 2.5rem;
  letter-spacing: -0.03em;
  background: linear-gradient(135deg, #E8E6E1 0%, #DEC079 40%, #C5A55A 70%, #E8E6E1 100%);
  background-size: 200% auto;
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  animation: gradientShift 6s ease infinite;
}
.hero-title span {
  -webkit-text-fill-color: var(--gold);
}

[data-theme="light"] .hero-title {
  background: linear-gradient(135deg, #0D1B2A, #1A365D, #8B6914);
  background-size: 200% auto;
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}


/* ============================================================
   SEARCH
   ============================================================ */
.search-container {
  width: 100%;
  max-width: 38rem;
  position: relative;
  opacity: 0;
  animation: fadeUp 0.85s var(--ease-out) forwards 0.5s;
  margin-bottom: 2rem;
}

.search-wrapper {
  display: flex;
  align-items: center;
  background: rgba(10, 18, 34, 0.6);
  backdrop-filter: blur(20px) saturate(1.3);
  -webkit-backdrop-filter: blur(20px) saturate(1.3);
  border: 1px solid rgba(197,165,90,0.12);
  border-radius: 999px;
  height: 56px;
  padding: 0 6px 0 16px;
  box-shadow: 0 8px 32px rgba(0,0,0,0.3), 0 0 0 1px rgba(197,165,90,0.04) inset;
  transition: var(--transition-slow);
  gap: 4px;
}
.search-wrapper:focus-within {
  border-color: rgba(197,165,90,0.3);
  box-shadow: 0 12px 44px rgba(0,0,0,0.35), 0 0 24px rgba(197,165,90,0.06);
}

.search-bar {
  flex: 1;
  background: transparent;
  border: none;
  padding: 0 8px;
  font-family: var(--font-body);
  font-size: 0.95rem;
  font-weight: 500;
  color: #E8E6E1;
  outline: none;
  direction: rtl;
  height: 100%;
  min-width: 0;
}
.search-bar::placeholder { color: rgba(232,230,225,0.35); }

.search-filter-select {
  background: transparent;
  border: none;
  border-right: 1px solid rgba(197,165,90,0.12);
  height: 32px;
  padding: 0 10px;
  padding-left: 22px;
  font-family: var(--font-body);
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--gold-light);
  outline: none;
  cursor: pointer;
  min-width: 80px;
  direction: rtl;
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='10' height='6'%3E%3Cpath d='M0 0l5 6 5-6z' fill='%23DEC079'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: left 6px center;
  flex-shrink: 0;
  transition: var(--transition);
}

.search-icon { display: none; }

.search-btn {
  width: 44px;
  height: 44px;
  min-width: 44px;
  background: linear-gradient(135deg, var(--gold), var(--gold-light));
  color: #060B15;
  border: none;
  border-radius: 50%;
  cursor: pointer;
  transition: var(--transition);
  flex-shrink: 0;
  box-shadow: 0 4px 16px rgba(197,165,90,0.25);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 0;
}
.search-btn:hover {
  transform: scale(1.08);
  box-shadow: 0 6px 24px rgba(197,165,90,0.35);
}
.search-btn:active { transform: scale(0.96); }


/* ============================================================
   TRENDING TAGS
   ============================================================ */
.trending {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
  justify-content: center;
  margin-top: 14px;
}
.trending-label {
  font-family: var(--font-body);
  font-size: 0.72rem;
  color: var(--gold-light);
  letter-spacing: 0.06em;
  opacity: 0.65;
  margin-left: 4px;
}
.trending-tag {
  background: transparent;
  border: none;
  color: rgba(232,230,225,0.5);
  padding: 4px 0;
  border-radius: 0;
  font-size: 0.75rem;
  font-weight: 500;
  cursor: pointer;
  transition: var(--transition);
  font-family: var(--font-body);
  border-bottom: 1px dashed rgba(197,165,90,0.2);
}
.trending-tag:hover {
  color: var(--gold-light);
  border-bottom-color: var(--gold);
}


/* ============================================================
   HERO STATS
   ============================================================ */
.hero-stats {
  display: flex;
  gap: 3rem;
  opacity: 0;
  animation: fadeUp 0.9s var(--ease-out) forwards 0.75s;
  margin-top: 0.5rem;
}
.stat { text-align: center; }
.stat-number {
  font-family: 'Playfair Display', var(--font-heading);
  font-size: 2rem;
  font-weight: 700;
  color: var(--gold-light);
  line-height: 1;
  margin-bottom: 0.4rem;
  letter-spacing: -0.02em;
  text-shadow: 0 0 24px rgba(197,165,90,0.25);
}
.stat-label { font-size: 0.72rem; color: var(--theme-body); font-weight: 600; letter-spacing: 0.06em; opacity: 0.85; }
.stat-divider { width: 1px; height: 36px; background: rgba(197,165,90,0.15); align-self: center; }

.scroll-indicator {
  position: absolute;
  bottom: 2rem;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
  color: var(--gold-light);
  font-size: 0.7rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  opacity: 0.6;
}
.scroll-arrow {
  width: 18px; height: 18px;
  border-right: 2px solid rgba(197,165,90,0.4);
  border-bottom: 2px solid rgba(197,165,90,0.4);
  transform: rotate(45deg);
  animation: bounce 2.2s ease-in-out infinite;
}

.scroll-hint {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  text-decoration: none;
  margin-top: 2.5rem;
  padding-bottom: 0.5rem;
  opacity: 0;
  animation: fadeUp 1s var(--ease-out) forwards 1s;
}
.scroll-hint-text {
  font-family: var(--font-body);
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--gold-light);
  opacity: 0.55;
  letter-spacing: 0.04em;
  transition: opacity 0.3s;
}
.scroll-hint:hover .scroll-hint-text { opacity: 1; }
.scroll-hint-arrow {
  color: var(--gold);
  opacity: 0.45;
  animation: scrollBounce 2s ease-in-out infinite;
  transition: opacity 0.3s;
}
.scroll-hint:hover .scroll-hint-arrow { opacity: 0.9; }
@keyframes scrollBounce {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(6px); }
}


/* ============================================================
   SECTIONS
   ============================================================ */
.section-inner { max-width: 1140px; margin: 0 auto; padding: 0 2.5rem; }

.section-header {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  margin-bottom: 2.25rem;
}
.section-label {
  font-family: var(--font-body);
  font-size: 0.65rem;
  font-weight: 700;
  color: var(--gold);
  text-transform: uppercase;
  letter-spacing: 0.22em;
  margin-bottom: 0.5rem;
}
.section-title {
  font-family: var(--font-heading);
  font-size: 1.85rem;
  font-weight: 700;
  color: var(--gold-heading);
  line-height: 1.35;
  letter-spacing: -0.02em;
}

.btn-see-all {
  text-decoration: none;
  font-family: var(--font-body);
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--theme-body);
  border: 1px solid rgba(197,165,90,0.15);
  padding: 0.5rem 1.25rem;
  border-radius: 12px;
  transition: var(--transition);
  white-space: nowrap;
}
.btn-see-all:hover {
  background: linear-gradient(135deg, var(--gold), var(--gold-light));
  color: #060B15;
  border-color: var(--gold);
  transform: translateY(-2px);
  box-shadow: 0 4px 20px rgba(197,165,90,0.2);
}

.btn-clear-search {
  background: rgba(255,255,255,0.05);
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: 10px;
  padding: 0.5rem 1rem;
  font-family: var(--font-body);
  font-size: 0.82rem;
  font-weight: 600;
  cursor: pointer;
  color: rgba(232,230,225,0.85);
  transition: var(--transition);
}
.btn-clear-search:hover { border-color: #f87171; color: #fca5a5; }


/* ============================================================
   CATEGORIES
   ============================================================ */
.categories-section { padding: 5rem 0; }
.categories-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 1.25rem;
  direction: rtl;
}
.categories-grid .category-card { direction: rtl; }

.category-card {
  background: var(--slate-900-50);
  backdrop-filter: blur(16px) saturate(1.2);
  -webkit-backdrop-filter: blur(16px) saturate(1.2);
  border-radius: var(--radius-3xl);
  padding: 1.75rem 1.5rem;
  cursor: pointer;
  transition: var(--transition-slow);
  border: 1px solid rgba(197,165,90,0.06);
  position: relative;
  overflow: hidden;
  text-decoration: none;
  display: block;
  box-shadow: 0 8px 32px rgba(0,0,0,0.25);
}
.category-card::before {
  content: '';
  position: absolute;
  top: 0; right: 0;
  width: 3px; height: 0;
  background: linear-gradient(180deg, var(--gold), var(--gold-light));
  transition: height 0.5s var(--ease-out);
  border-radius: 0 0 0 2px;
}
.category-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
  border-color: rgba(197,165,90,0.2);
}
.category-card:hover::before { height: 100%; }

.category-icon { font-size: 1.85rem; margin-bottom: 0.85rem; }
.category-name {
  font-family: var(--font-heading);
  font-weight: 700;
  color: var(--theme-heading);
  font-size: 0.95rem;
  margin-bottom: 0.35rem;
  letter-spacing: -0.01em;
}
.category-count { font-size: 0.78rem; color: var(--gray-400); }


/* ============================================================
   FILES LIST
   ============================================================ */
.files-section { padding: 0 0 5rem; }
.files-list { display: flex; flex-direction: column; gap: 0.75rem; }

.file-item {
  background: var(--slate-900-50);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid rgba(197,165,90,0.06);
  border-radius: 1.125rem;
  padding: 1rem 1.25rem;
  display: flex;
  align-items: center;
  gap: 1rem;
  transition: var(--transition);
  box-shadow: 0 4px 20px rgba(0,0,0,0.2);
}
.file-item:hover {
  border-color: rgba(197,165,90,0.2);
  box-shadow: 0 8px 32px rgba(0,0,0,0.3), 0 0 24px rgba(197,165,90,0.05);
  transform: translateX(-4px);
}
.file-item-as-link {
  text-decoration: none;
  color: inherit;
  cursor: pointer;
}
.file-item-inner {
  flex: 1;
  display: flex;
  align-items: center;
  gap: 1rem;
  min-width: 0;
}

.file-icon {
  width: 44px; height: 44px;
  border-radius: 12px;
  display: flex; align-items: center; justify-content: center;
  font-size: 1.1rem;
  flex-shrink: 0;
}
.file-icon.pdf { background: rgba(254,226,226,0.12); }
.file-icon.docx { background: rgba(219,234,254,0.12); }

.file-info { flex: 1; min-width: 0; }
.file-name {
  font-family: var(--font-heading);
  font-weight: 700;
  color: var(--theme-heading);
  font-size: 0.9rem;
  margin-bottom: 0.25rem;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.file-meta { font-size: 0.76rem; color: var(--gray-400); }
.file-stars { color: var(--gold-light); font-size: 0.7rem; margin-top: 0.2rem; display: block; }

.file-badge {
  padding: 0.25rem 0.6rem;
  border-radius: 8px;
  font-size: 0.7rem;
  font-weight: 700;
  white-space: nowrap;
}
.badge-grade { background: rgba(4,120,87,0.12); color: #34D399; }
.badge-type { background: var(--gray-100); color: var(--gray-700); }

.file-actions { display: flex; gap: 0.4rem; align-items: center; flex-shrink: 0; }

.btn-icon {
  width: 34px; height: 34px;
  border: 1px solid rgba(197,165,90,0.12);
  background: rgba(197,165,90,0.05);
  border-radius: 10px;
  cursor: pointer;
  display: flex; align-items: center; justify-content: center;
  font-size: 0.85rem;
  transition: var(--transition);
  color: var(--theme-body);
}
.btn-icon:hover {
  background: rgba(197,165,90,0.15);
  border-color: rgba(197,165,90,0.3);
  color: var(--gold-light);
}

.btn-download {
  background: linear-gradient(135deg, var(--gold), var(--gold-light));
  color: #060B15 !important;
  border-radius: 10px;
  padding: 0.4rem 0.85rem;
  border: none;
  font-family: var(--font-body);
  font-size: 0.8rem;
  font-weight: 700;
  cursor: pointer;
  display: flex; align-items: center; gap: 0.35rem;
  transition: var(--transition);
  white-space: nowrap;
  text-decoration: none;
  box-shadow: 0 2px 8px rgba(197,165,90,0.2);
}
.btn-download:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 16px rgba(197,165,90,0.3);
  color: #060B15 !important;
}


/* ============================================================
   CONTRIBUTORS
   ============================================================ */
.contributors-section { background: transparent; padding: 4rem 0; border-top: 1px solid rgba(197,165,90,0.06); }
.contributors-inner { max-width: 1140px; margin: 0 auto; padding: 0 2.5rem; }
.contributors-grid { display: flex; gap: 1rem; flex-wrap: wrap; margin-top: 2rem; }

.contributor-card {
  background: var(--slate-900-50);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid rgba(197,165,90,0.06);
  border-radius: 1.25rem;
  padding: 1rem 1.25rem;
  display: flex;
  align-items: center;
  gap: 1rem;
  flex: 1;
  min-width: 172px;
  transition: var(--transition);
  cursor: default;
  box-shadow: 0 4px 20px rgba(0,0,0,0.2);
}
.contributor-card:hover {
  border-color: rgba(197,165,90,0.2);
  box-shadow: 0 8px 32px rgba(0,0,0,0.3), 0 0 24px rgba(197,165,90,0.05);
  transform: translateY(-4px);
}
.contributor-avatar {
  width: 42px; height: 42px; border-radius: 50%;
  background: linear-gradient(135deg, var(--gold), #DEC079);
  display: flex; align-items: center; justify-content: center;
  font-size: 0.9rem; font-weight: 700; color: #060B15; flex-shrink: 0;
  box-shadow: 0 2px 8px rgba(197,165,90,0.2);
}
.contributor-name { font-family: var(--font-heading); font-size: 0.88rem; font-weight: 600; color: var(--theme-heading); margin-bottom: 0.15rem; }
.contributor-count { font-size: 0.72rem; color: var(--theme-body); opacity: 0.85; }
.contributor-badge { margin-right: auto; font-size: 1rem; }


/* ============================================================
   UPLOAD CARD & BANNER
   ============================================================ */
.category-card-upload {
  cursor: pointer;
  background: var(--slate-900-50);
  border: 1px solid rgba(197,165,90,0.08);
  text-align: center;
  order: 999;
  direction: rtl;
  backdrop-filter: blur(16px);
}
.category-card-upload .category-icon { font-size: 1.85rem; }
.category-card-upload .category-name { color: var(--theme-heading); font-weight: 700; }
.category-card-upload .category-count { color: var(--gray-400); font-size: 0.78rem; }
.category-card-upload:hover {
  border-color: rgba(197,165,90,0.3);
  box-shadow: 0 12px 32px rgba(197,165,90,0.1);
  transform: translateY(-6px);
}
.category-card-upload:focus { outline: 2px solid var(--gold); outline-offset: 2px; }

.upload-banner {
  background: linear-gradient(135deg, rgba(197,165,90,0.08), rgba(197,165,90,0.04));
  border: 1px solid rgba(197,165,90,0.12);
  border-radius: var(--radius-lg);
  padding: 24px 32px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin: 40px auto;
}
.upload-banner-text { display: flex; align-items: center; gap: 16px; }
.upload-icon { font-size: 2rem; }
.upload-title { font-size: 1rem; font-weight: 700; color: var(--navy); margin-bottom: 4px; }
.upload-sub { font-size: 0.82rem; color: var(--gray-400); }

.btn-upload {
  background: linear-gradient(135deg, var(--gold), var(--gold-light));
  color: #060B15;
  border: none;
  border-radius: 12px;
  padding: 12px 24px;
  font-family: var(--font-body);
  font-size: 0.9rem;
  font-weight: 700;
  cursor: pointer;
  transition: var(--transition);
  white-space: nowrap;
  box-shadow: 0 2px 12px rgba(197,165,90,0.2);
}
.btn-upload:hover { transform: translateY(-2px); box-shadow: 0 6px 24px rgba(197,165,90,0.3); }


/* ============================================================
   SEARCH RESULTS
   ============================================================ */
.search-results-section { padding: 5rem 0 2.5rem; }


/* ============================================================
   PAGE HEADER
   ============================================================ */
.page-header {
  background: linear-gradient(160deg, #040810 0%, #0A1222 50%, #111C30 100%);
  padding: 6rem 0 3.5rem;
}
.page-title {
  font-family: var(--font-heading);
  font-size: 2.25rem;
  font-weight: 700;
  color: var(--gold-heading);
  margin: 0.5rem 0 0.75rem;
  letter-spacing: -0.02em;
}
.page-subtitle { color: var(--body-text); font-size: 0.9rem; }
.back-link {
  color: var(--theme-body);
  text-decoration: none;
  font-size: 0.85rem;
  display: inline-block;
  margin-bottom: 1rem;
  transition: var(--transition);
}
.back-link:hover { color: var(--gold-light); }
[data-theme="light"] .back-link:hover { color: var(--theme-heading); }


/* ============================================================
   COURSE PAGE
   ============================================================ */
.course-page-wrap { background: var(--midnight); min-height: 100vh; padding: 2rem 1rem 4rem; }
@media (min-width: 768px) { .course-page-wrap { padding-left: 2rem; padding-right: 2rem; } }

.course-breadcrumbs {
  max-width: 1140px; margin: 0 auto 1.5rem;
  font-size: 0.9rem; color: var(--gray-400); display: flex; align-items: center; gap: 0.5rem; flex-wrap: wrap;
}
.course-breadcrumbs a { color: var(--navy); text-decoration: none; padding: 0.25rem 0.5rem; border-radius: 8px; transition: var(--transition); }
.course-breadcrumbs a:hover { background: rgba(197,165,90,0.08); color: var(--gold-light); }
.course-bread-sep { color: var(--gray-400); user-select: none; }

.course-progress-wrap { max-width: 1140px; margin: 0 auto 2rem; }
.course-progress-label { display: flex; justify-content: space-between; font-size: 0.88rem; margin-bottom: 0.5rem; font-weight: 600; color: var(--theme-body); }
.course-progress-bar { height: 6px; background: var(--gray-200); border-radius: 999px; overflow: hidden; }
.course-progress-fill { height: 100%; background: linear-gradient(90deg, var(--gold), var(--gold-light)); border-radius: 999px; transition: width 0.4s var(--ease); }

.course-layout { display: flex; flex-wrap: wrap; gap: 0; max-width: 1200px; margin: 0 auto; }

.course-sidebar {
  width: 100%; max-width: 280px; flex-shrink: 0;
  background: rgba(8,14,28,0.95); color: white; padding: 1.5rem; border-radius: 0 0 0 20px;
  position: sticky; top: 64px; align-self: flex-start; max-height: calc(100vh - 5rem); overflow-y: auto;
  border: 1px solid rgba(197,165,90,0.06);
}
.course-sidebar-title { font-family: var(--font-heading); font-size: 0.75rem; font-weight: 700; text-transform: uppercase; letter-spacing: 0.12em; color: var(--gold-light); margin-bottom: 1rem; }
.course-curriculum { display: flex; flex-direction: column; gap: 0.25rem; }
.course-curriculum-btn {
  width: 100%; text-align: right; padding: 0.75rem 1rem; border: none; background: transparent; color: var(--theme-body);
  font-family: var(--font-body); font-size: 0.9rem; font-weight: 600; border-radius: 12px; cursor: pointer; transition: var(--transition);
  display: flex; align-items: center; justify-content: space-between; gap: 0.5rem;
}
.course-curriculum-btn:hover { background: rgba(197,165,90,0.08); color: var(--gold-light); }
.course-curriculum-btn.active { background: rgba(197,165,90,0.12); color: var(--gold-light); }
[data-theme="light"] .course-curriculum-btn:hover,
[data-theme="light"] .course-curriculum-btn.active { background: rgba(0,0,0,0.04); color: var(--theme-heading); }
.course-curriculum-count { font-size: 0.75rem; background: rgba(197,165,90,0.15); color: var(--gold-light); padding: 0.2rem 0.5rem; border-radius: 999px; }
.course-sidebar-footer { margin-top: 1.5rem; padding-top: 1rem; border-top: 1px solid rgba(197,165,90,0.08); }
.course-sidebar-count { font-size: 0.82rem; color: var(--theme-body); margin-bottom: 0.5rem; }
.course-sidebar-refresh {
  padding: 0.5rem 1rem; border-radius: 10px; border: 1px solid rgba(197,165,90,0.12); background: rgba(197,165,90,0.06);
  color: var(--theme-body); font-size: 0.85rem; cursor: pointer; transition: var(--transition);
}
[data-theme="light"] .course-sidebar-refresh { border-color: rgba(0,0,0,0.1); background: rgba(0,0,0,0.03); color: var(--theme-body); }
.course-sidebar-refresh:hover { background: rgba(197,165,90,0.12); color: var(--gold-light); }

.course-main { flex: 1; min-width: 0; padding: 0 1rem 2rem; }
.course-main .course-card {
  background: var(--card-bg); backdrop-filter: blur(24px); -webkit-backdrop-filter: blur(24px);
  border-radius: 2rem; box-shadow: 0 25px 50px -12px rgba(0,0,0,0.2);
  border: 1px solid rgba(197,165,90,0.10); overflow: hidden;
}
.nav-brand-course { max-width: 200px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
@media (max-width: 768px) {
  .nav-brand-course { max-width: 140px; }
}
.course-card-header { padding: 2rem 2rem 0; }
.course-card-category { font-size: 0.72rem; font-weight: 700; color: var(--gold); letter-spacing: 0.12em; text-transform: uppercase; margin-bottom: 0.25rem; }
.course-card-title { font-family: var(--font-heading); font-size: 1.75rem; font-weight: 700; color: var(--theme-heading); line-height: 1.5; margin: 0 0 0.5rem; }
.course-card-desc { font-size: 0.9rem; color: var(--theme-body); line-height: 1.6; margin: 0; }

.course-filters {
  display: flex; flex-wrap: wrap; gap: 0.75rem; align-items: center; padding: 1.5rem 2rem 0;
}
.course-filter-input, .course-filter-select {
  padding: 0.6rem 1rem; border-radius: 14px; border: 1px solid rgba(197,165,90,0.10); background: rgba(255,255,255,0.04);
  font-family: var(--font-body); font-size: 0.9rem; color: var(--theme-body); min-height: 44px; transition: var(--transition);
}
.course-filter-input { flex: 1; min-width: 180px; }
.lecturer-filter-wrap { position: relative; flex: 1; min-width: 180px; }
.lecturer-filter-wrap .course-filter-input { width: 100%; }
.lecturer-filter-wrap .upload-course-dropdown { min-width: 100%; right: 0; left: auto; max-height: 300px; }
.course-filter-input:focus, .course-filter-select:focus { outline: none; border-color: var(--gold); box-shadow: 0 0 0 3px rgba(197,165,90,0.1); }
.course-btn-upload {
  padding: 0.6rem 1.25rem; border-radius: 14px; border: 2px solid var(--gold); background: transparent; color: var(--gold-light);
  font-weight: 700; font-size: 0.9rem; cursor: pointer; transition: var(--transition);
}
.course-btn-upload:hover { background: linear-gradient(135deg, var(--gold), var(--gold-light)); color: #060B15; transform: scale(1.02); }
.course-content { padding: 1.5rem 2rem 2rem; }
.course-loading { text-align: center; padding: 3rem; color: var(--theme-body); line-height: 1.6; }

.course-tabs-row { display: flex; flex-wrap: wrap; gap: 0.5rem; margin-bottom: 1.5rem; direction: rtl; }
.course-tab-btn {
  padding: 0.65rem 1rem; border-radius: 12px; border: 1px solid rgba(197,165,90,0.10); background: var(--card-bg);
  font-family: var(--font-body); font-size: 0.9rem; font-weight: 600; color: var(--theme-body); cursor: pointer;
  transition: var(--transition);
}
.course-tab-btn:hover { border-color: rgba(197,165,90,0.3); color: var(--gold-light); background: rgba(197,165,90,0.06); }
.course-tab-btn.course-tab-active { border-color: var(--gold); background: linear-gradient(135deg, var(--gold), var(--gold-light)); color: #060B15; }
.course-tab-count { font-size: 0.8rem; opacity: 0.9; margin-right: 0.25rem; }
.course-panel { margin-bottom: 2rem; }
.course-panel-title { font-family: var(--font-heading); font-size: 1.1rem; font-weight: 700; color: var(--theme-heading); margin-bottom: 1rem; }
.course-table-wrap { overflow-x: auto; border: 1px solid rgba(197,165,90,0.08); border-radius: 14px; background: var(--card-bg); }
.course-pagination { display: flex; flex-wrap: wrap; align-items: center; gap: 0.5rem; margin-top: 1rem; direction: rtl; }
.course-pag-btn, .course-pag-num {
  padding: 0.5rem 0.75rem; border-radius: 10px; border: 1px solid rgba(197,165,90,0.10); background: var(--card-bg);
  color: var(--theme-body); font-size: 0.9rem; cursor: pointer; transition: var(--transition);
}
.course-pag-btn:hover:not(:disabled), .course-pag-num:hover { background: linear-gradient(135deg, var(--gold), var(--gold-light)); color: #060B15; border-color: var(--gold); }
.course-pag-btn:disabled { opacity: 0.4; cursor: not-allowed; }
.course-pag-num.course-pag-current { background: linear-gradient(135deg, var(--gold), var(--gold-light)); color: #060B15; border-color: var(--gold); }
.course-pag-info { font-size: 0.85rem; color: var(--theme-body); margin-right: 0.5rem; }
.course-curriculum-btn.active { background: rgba(197,165,90,0.15); color: var(--gold-light); }

.course-type-table { width: 100%; border-collapse: collapse; font-size: 0.85rem; }
.course-type-table th { text-align: right; padding: 0.65rem 0.5rem; background: rgba(197,165,90,0.06); font-weight: 700; color: var(--theme-heading); border-bottom: 1px solid rgba(197,165,90,0.08); white-space: nowrap; }
.course-type-table td { padding: 0.55rem 0.5rem; border-bottom: 1px solid rgba(255,255,255,0.04); color: var(--theme-body); vertical-align: middle; }
.course-type-table tr:hover td { background: rgba(197,165,90,0.04); }
.course-type-table tr.course-file-highlight td { background: rgba(197,165,90,0.15); box-shadow: inset 0 0 0 2px rgba(197,165,90,0.3); animation: course-file-highlight-fade 3s ease-out forwards; }
@keyframes course-file-highlight-fade { to { background: rgba(197,165,90,0.04); box-shadow: none; } }
.course-td-actions { white-space: nowrap; }
.course-td-actions .course-tbl-btn, .course-td-actions .course-tbl-dl {
  display: inline-flex; align-items: center; justify-content: center; width: 30px; height: 30px; padding: 0; border-radius: 8px;
  border: 1px solid rgba(197,165,90,0.12); background: rgba(197,165,90,0.05); color: var(--theme-body); font-size: 0.85rem; cursor: pointer;
  text-decoration: none; margin-left: 2px; transition: var(--transition);
}
.course-td-actions .course-tbl-btn:hover, .course-td-actions .course-tbl-dl:hover { background: linear-gradient(135deg, var(--gold), var(--gold-light)); color: #060B15; border-color: var(--gold); }
.course-td-actions .course-tbl-dl { background: linear-gradient(135deg, var(--gold), var(--gold-light)); color: #060B15; border-color: var(--gold); font-weight: 600; }
.course-td-actions .course-tbl-dl:hover { box-shadow: 0 2px 8px rgba(197,165,90,0.25); }
.course-empty { text-align: center; padding: 3rem; color: var(--theme-body); line-height: 1.6; }

@media (max-width: 1200px) { .course-columns-grid { grid-template-columns: repeat(3, 1fr); } }
@media (max-width: 768px) { .course-columns-grid { grid-template-columns: 1fr 1fr; } }
@media (max-width: 576px) { .course-columns-grid { grid-template-columns: 1fr; } }
@media (max-width: 991px) {
  .course-sidebar { max-width: 100%; border-radius: 16px; margin-bottom: 1rem; position: static; max-height: none; }
  .course-layout { flex-direction: column; }
}


/* ============================================================
   FILTER BAR
   ============================================================ */
.filter-bar { display: flex; gap: 12px; flex-wrap: wrap; margin-top: 24px; align-items: center; }

.filter-select {
  background: var(--card-bg) !important;
  border: 1px solid rgba(197,165,90,0.10) !important;
  border-radius: 10px;
  padding: 8px 12px 8px 30px;
  font-family: var(--font-body);
  font-size: 0.82rem;
  color: var(--gray-700) !important;
  outline: none;
  cursor: pointer;
  direction: rtl;
  appearance: none;
  -webkit-appearance: none;
  -moz-appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='10' height='6'%3E%3Cpath d='M0 0l5 6 5-6z' fill='%23DEC079'/%3E%3C/svg%3E") !important;
  background-repeat: no-repeat !important;
  background-position: left 10px center !important;
  background-color: var(--card-bg) !important;
  min-width: 136px;
  min-height: 36px;
  transition: var(--transition);
}
.filter-select:focus { border-color: var(--gold) !important; box-shadow: 0 0 0 3px rgba(197,165,90,0.08); }
.filter-select option {
  background: var(--card-bg) !important;
  color: var(--gray-700) !important;
}

.filter-input {
  background: var(--card-bg) !important;
  border: 1px solid rgba(197,165,90,0.10) !important;
  border-radius: 10px;
  padding: 8px 12px;
  font-family: var(--font-body);
  font-size: 0.82rem;
  color: var(--gray-700) !important;
  outline: none;
  flex: 1;
  min-width: 172px;
  min-height: 36px;
  direction: rtl;
  transition: var(--transition);
}
.filter-input:focus { border-color: var(--gold) !important; box-shadow: 0 0 0 3px rgba(197,165,90,0.08); }
.filter-input::placeholder { color: var(--gray-400); }

.page-header .filter-select {
  background: rgba(255,255,255,0.06) !important;
  border-color: rgba(197,165,90,0.10) !important;
  color: #fff !important;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='10' height='6'%3E%3Cpath d='M0 0l5 6 5-6z' fill='%23DEC079'/%3E%3C/svg%3E") !important;
}
.page-header .filter-select option { background: #0A1222; color: #E8E6E1; }
.page-header .filter-input {
  background: rgba(255,255,255,0.06) !important;
  border-color: rgba(197,165,90,0.10) !important;
  color: #fff !important;
}
.page-header .filter-input:focus { border-color: rgba(197,165,90,0.4) !important; }
.page-header .filter-input::placeholder { color: rgba(255,255,255,0.35); }

.btn-upload-small {
  background: linear-gradient(135deg, var(--gold), var(--gold-light));
  color: #060B15;
  border: none;
  border-radius: 10px;
  padding: 9px 16px;
  font-family: var(--font-body);
  font-size: 0.85rem;
  font-weight: 700;
  cursor: pointer;
  transition: var(--transition);
  white-space: nowrap;
  box-shadow: 0 2px 8px rgba(197,165,90,0.15);
}
.btn-upload-small:hover { transform: translateY(-2px); box-shadow: 0 4px 16px rgba(197,165,90,0.25); }


/* ============================================================
   COURSES GRID
   ============================================================ */
.courses-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 1.25rem;
}

.courses-grid .course-card {
  background: var(--glass-card);
  backdrop-filter: blur(16px) saturate(1.2);
  -webkit-backdrop-filter: blur(16px) saturate(1.2);
  border: 1px solid rgba(197,165,90,0.06);
  border-radius: var(--radius-3xl);
  padding: 1.5rem;
  text-decoration: none;
  display: block;
  transition: transform 0.4s var(--ease), box-shadow 0.4s var(--ease), border-color 0.4s var(--ease);
  position: relative;
  overflow: hidden;
  box-shadow: 0 8px 32px rgba(0,0,0,0.25);
}
.course-card::before {
  content: '';
  position: absolute;
  top: 0; right: 0;
  width: 3px; height: 0;
  background: linear-gradient(180deg, var(--gold), var(--gold-light));
  transition: height 0.5s var(--ease-out);
  border-radius: 0 0 0 2px;
}
.courses-grid .course-card:hover { transform: scale(1.04) translateY(-4px); box-shadow: var(--shadow-lg); border-color: rgba(197,165,90,0.2); }
.course-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg); border-color: rgba(197,165,90,0.2); }
.course-card:hover::before { height: 100%; }

.course-card-icon { font-size: 1.75rem; margin-bottom: 0.75rem; opacity: 0.9; }
.course-card-category { font-size: 0.65rem; font-weight: 700; color: var(--gold); text-transform: uppercase; letter-spacing: 0.14em; margin-bottom: 0.5rem; }
.course-card-name { font-family: var(--font-heading); font-weight: 700; color: var(--theme-heading); font-size: 0.95rem; margin-bottom: 0.75rem; line-height: 1.4; letter-spacing: -0.01em; }
.course-card-meta { font-size: 0.76rem; color: var(--gray-400); }
.course-card-progress-wrap { margin-top: 1rem; }
.course-card-progress-bar { height: 4px; background: var(--gray-200); border-radius: 999px; overflow: hidden; margin-bottom: 0.5rem; }
.course-card-progress-fill { height: 100%; background: linear-gradient(90deg, var(--gold), var(--gold-light)); border-radius: 999px; transition: width 0.4s var(--ease); }
.course-card-count { font-size: 0.78rem; font-weight: 600; color: var(--gray-500); }
.course-card-btn {
  display: inline-block;
  margin-top: 1rem;
  width: 100%;
  text-align: center;
  padding: 0.65rem 1rem;
  background: linear-gradient(135deg, var(--gold), var(--gold-light));
  color: #060B15;
  border-radius: 12px;
  font-size: 0.9rem;
  font-weight: 600;
  transition: var(--transition);
  box-shadow: 0 2px 8px rgba(197,165,90,0.15);
}
.course-card:hover .course-card-btn { box-shadow: 0 4px 16px rgba(197,165,90,0.25); }


/* ============================================================
   FILES TABLE
   ============================================================ */
.files-table-wrap { overflow-x: auto; border-radius: var(--radius); border: 1px solid rgba(197,165,90,0.08); }

.files-table {
  width: 100%;
  border-collapse: collapse;
  background: var(--card-bg);
}
.files-table th {
  background: rgba(197,165,90,0.05);
  padding: 12px 16px;
  font-size: 0.78rem;
  font-weight: 700;
  color: var(--theme-heading);
  text-align: right;
  white-space: nowrap;
  border-bottom: 1px solid rgba(197,165,90,0.08);
}
.files-table td {
  padding: 12px 16px;
  font-size: 0.85rem;
  color: var(--theme-body);
  border-bottom: 1px solid rgba(255,255,255,0.04);
  vertical-align: middle;
}
.files-table tr:last-child td { border-bottom: none; }
.files-table tr:hover td { background: rgba(197,165,90,0.03); }

.td-name { font-weight: 600; color: var(--theme-heading); max-width: 280px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.td-actions { display: flex; gap: 6px; align-items: center; }

.admin-files-section .section-title { color: var(--theme-heading) !important; }
.admin-files-grouped { min-height: 120px; }
.admin-breadcrumb { font-size: 0.9rem; color: var(--theme-body); }
.admin-breadcrumb a { color: var(--gold-heading); text-decoration: none; }
.admin-breadcrumb a:hover { text-decoration: underline; }
.admin-bc-sep { margin: 0 0.35rem; opacity: 0.7; }
.admin-course-name { font-size: 1.1rem; }
.admin-years-courses-wrap .admin-year-heading:first-child { margin-top: 0 !important; }
.admin-year-heading { font-size: 1.05rem; color: var(--theme-heading); }
#adminPanel .course-card { cursor: pointer; text-decoration: none; color: inherit; }
#adminPanel .course-card:hover { border-color: rgba(197,165,90,0.3); }
.course-td-actions .btn-edit { background: rgba(197,165,90,0.15); border-color: rgba(197,165,90,0.35); color: var(--gold-light); }
.course-td-actions .btn-edit:hover { background: rgba(197,165,90,0.3); color: #fff; border-color: var(--gold); }
[data-theme="light"] .course-td-actions .btn-edit { background: rgba(139,105,20,0.08); color: #8B6914; }
[data-theme="light"] .course-td-actions .btn-edit:hover { background: rgba(139,105,20,0.16); color: #6B4F10; }
.course-td-actions .btn-delete { background: rgba(239,68,68,0.15); border-color: rgba(239,68,68,0.35); color: #f87171; }
.course-td-actions .btn-delete:hover { background: rgba(239,68,68,0.25); color: #fca5a5; border-color: #ef4444; }
[data-theme="light"] .course-td-actions .btn-delete { background: rgba(239,68,68,0.1); color: #dc2626; }
[data-theme="light"] .course-td-actions .btn-delete:hover { background: rgba(239,68,68,0.18); color: #b91c1c; }


/* ============================================================
   PAGINATION
   ============================================================ */
.pagination-bar { display: flex; flex-wrap: wrap; justify-content: center; gap: 8px; margin-top: 16px; align-items: center; }
.pagination-btn {
  padding: 8px 16px; border-radius: 10px; border: 1px solid rgba(197,165,90,0.12); background: var(--card-bg); color: var(--theme-body);
  font-family: var(--font-body); font-size: 0.9rem; font-weight: 600; cursor: pointer; transition: var(--transition);
}
.pagination-btn:hover:not(:disabled) { background: linear-gradient(135deg, var(--gold), var(--gold-light)); color: #060B15; border-color: var(--gold); }
.pagination-btn:disabled { opacity: 0.4; cursor: not-allowed; }
.pagination-btn-next { background: linear-gradient(135deg, var(--gold), var(--gold-light)); color: #060B15; border: 1px solid var(--gold); }
.pagination-btn-next:hover:not(:disabled) { box-shadow: 0 4px 16px rgba(197,165,90,0.25); }
.pagination-num {
  min-width: 36px; height: 36px; padding: 0 8px; border-radius: 10px; border: 1px solid rgba(197,165,90,0.10);
  background: var(--card-bg); color: var(--theme-body); font-family: var(--font-body); font-size: 0.88rem; font-weight: 600;
  cursor: pointer; transition: var(--transition);
}
.pagination-num:hover { border-color: rgba(197,165,90,0.3); color: var(--gold-light); background: rgba(197,165,90,0.06); }
.pagination-num-current { background: linear-gradient(135deg, var(--gold), var(--gold-light)); color: #060B15; border-color: var(--gold); cursor: default; }
.pagination-num-current:hover { background: linear-gradient(135deg, var(--gold), var(--gold-light)); color: #060B15; }
.pagination-info { color: var(--theme-body); font-size: 0.88rem; margin-right: 8px; }


/* ============================================================
   PREVIEW PANEL
   ============================================================ */
.preview-panel {
  position: fixed;
  top: 0; left: 0;
  width: 50%;
  height: 100%;
  background: var(--card-bg);
  box-shadow: 4px 0 40px rgba(0,0,0,0.3);
  z-index: 200;
  transform: translateX(-100%);
  transition: transform 0.4s cubic-bezier(0.4,0,0.2,1);
  display: flex;
  flex-direction: column;
  backdrop-filter: blur(24px);
  -webkit-backdrop-filter: blur(24px);
}
.preview-panel.open { transform: translateX(0); }

.preview-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.5);
  z-index: 199;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.4s ease;
}
.preview-backdrop.open { opacity: 1; pointer-events: all; }

.preview-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 20px;
  border-bottom: 1px solid rgba(197,165,90,0.08);
  font-family: var(--font-heading);
  font-weight: 600;
  color: var(--theme-heading);
  font-size: 0.9rem;
  flex-shrink: 0;
  position: relative;
  z-index: 10;
  background: var(--card-bg);
}
.preview-close {
  background: rgba(197,165,90,0.08);
  border: 1px solid rgba(197,165,90,0.12);
  width: 34px; height: 34px;
  border-radius: 10px;
  cursor: pointer;
  font-size: 1rem;
  color: var(--theme-body);
  transition: var(--transition);
}
.preview-close:hover { background: rgba(197,165,90,0.18); color: var(--gold-light); }
[data-theme="light"] .preview-close { background: rgba(0,0,0,0.05); border-color: rgba(0,0,0,0.1); }
.preview-btn-dl {
  background: linear-gradient(135deg, var(--gold), var(--gold-light));
  color: #060B15;
  border: none;
  border-radius: 10px;
  padding: 7px 14px;
  font-family: var(--font-body);
  font-size: 0.82rem;
  font-weight: 700;
  cursor: pointer;
  transition: var(--transition);
  box-shadow: 0 2px 8px rgba(197,165,90,0.15);
}
.preview-btn-dl:hover { transform: translateY(-1px); box-shadow: 0 4px 16px rgba(197,165,90,0.25); }

.preview-iframe-wrap {
  flex: 1 1 auto;
  min-height: 0;
  overflow: auto;
  -webkit-overflow-scrolling: touch;
  position: relative;
  display: flex;
  flex-direction: column;
}
.preview-iframe {
  flex: 1 1 auto;
  border: none;
  min-height: 0;
  width: 100%;
  height: 100%;
  min-height: 100%;
  overflow: auto;
  -webkit-overflow-scrolling: touch;
  background: var(--card-bg);
}
.preview-loading {
  position: absolute;
  inset: 0;
  top: 53px;
  display: flex;
  flex-direction: column;
  gap: 14px;
  align-items: center;
  justify-content: center;
  background: var(--card-bg);
  color: var(--theme-body);
  font-size: 0.9rem;
  z-index: 5;
  transition: opacity 0.3s ease;
}
.preview-loading::before {
  content: '';
  width: 36px;
  height: 36px;
  border: 3px solid rgba(197,165,90,0.15);
  border-top-color: var(--gold-light);
  border-radius: 50%;
  animation: preview-spin 0.7s linear infinite;
}
@keyframes preview-spin { to { transform: rotate(360deg); } }
.preview-loading[aria-hidden="true"] { display: none !important; }

.preview-panel.preview-local-file .preview-iframe-wrap { background: #fff; }
.preview-panel.preview-local-file .preview-iframe { background: #fff; }
.preview-local-embed { flex: 1; min-height: 0; width: 100%; height: 100%; }
.preview-local-object {
  position: absolute;
  top: 0; left: 0; right: 0; bottom: 0;
  width: 100%; height: 100%;
  min-height: 300px;
  border: 0;
  background: #fff;
}
.preview-newtab-link { font-size: 0.85rem; color: var(--gold); text-decoration: none; }
.preview-newtab-link:hover { text-decoration: underline; }

body.preview-open { overflow: hidden; }


/* ============================================================
   MODAL
   ============================================================ */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(6,11,21,0.5);
  backdrop-filter: blur(6px);
  z-index: 300;
  display: none;
  align-items: center;
  justify-content: center;
  padding: 1.5rem;
}
.modal-overlay.open {
  display: flex;
}
.modal {
  background: rgba(10, 18, 34, 0.97);
  backdrop-filter: blur(16px);
  border-radius: var(--radius-3xl);
  border: 1px solid rgba(197,165,90,0.10);
  width: 100%;
  max-width: 480px;
  max-height: 90vh;
  overflow-y: auto;
  box-shadow: var(--shadow-lg);
}
.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 24px;
  border-bottom: 1px solid rgba(197,165,90,0.08);
}
.modal-header h3 { font-family: var(--font-heading); font-weight: 700; color: var(--theme-heading); font-size: 1.2rem; }
.modal-close {
  background: rgba(197,165,90,0.08);
  border: 1px solid rgba(197,165,90,0.12);
  width: 34px; height: 34px;
  border-radius: 10px;
  cursor: pointer;
  font-size: 1rem;
  color: var(--theme-body);
  transition: var(--transition);
}
[data-theme="light"] .modal-close { background: rgba(0,0,0,0.05); border-color: rgba(0,0,0,0.1); }
.modal-close:hover { background: rgba(197,165,90,0.18); color: var(--gold-light); }
.modal-body { padding: 24px; }

.form-group { margin-bottom: 18px; }
.form-group label { display: block; font-size: 0.82rem; font-weight: 600; color: var(--theme-body); margin-bottom: 6px; font-family: var(--font-body); }
.form-control {
  width: 100%;
  border: 1px solid rgba(197,165,90,0.10);
  border-radius: 10px;
  padding: 9px 12px;
  background: rgba(255,255,255,0.04);
  font-family: var(--font-body);
  font-size: 0.88rem;
  font-weight: 500;
  color: var(--theme-body);
  outline: none;
  transition: var(--transition);
  direction: rtl;
}
.form-control:focus { border-color: rgba(197,165,90,0.4); box-shadow: 0 0 0 3px rgba(197,165,90,0.08); }
.form-control::placeholder { color: var(--theme-body); opacity: 0.5; }

.upload-course-dropdown {
  position: absolute;
  top: 100%;
  left: 0;
  right: 0;
  z-index: 100;
  max-height: 220px;
  overflow-y: auto;
  background: var(--card-bg);
  border: 1px solid rgba(255,255,255,0.12);
  border-radius: 14px;
  margin-top: 4px;
  box-shadow: 0 8px 32px rgba(0,0,0,0.35);
  scrollbar-width: thin;
  scrollbar-color: rgba(197,165,90,0.3) transparent;
}
.upload-course-item {
  padding: 10px 16px;
  cursor: pointer;
  font-size: 0.9rem;
  color: var(--theme-body);
  transition: background 0.15s;
  font-family: 'Assistant', sans-serif;
}
.upload-course-item:hover,
.upload-course-item.active {
  background: rgba(197,165,90,0.15);
  color: var(--gold-light);
}
.upload-course-item.upload-course-empty {
  cursor: default;
  opacity: 0.5;
  text-align: center;
}
.upload-course-item.upload-course-empty:hover {
  background: none;
  color: var(--theme-body);
}
[data-theme="light"] .upload-course-dropdown {
  background: #fff;
  border-color: rgba(0,0,0,0.1);
  box-shadow: 0 8px 24px rgba(0,0,0,0.12);
}
[data-theme="light"] .upload-course-item:hover,
[data-theme="light"] .upload-course-item.active {
  background: rgba(139,105,20,0.08);
  color: #8B6914;
}

.file-drop-zone {
  border: 2px dashed rgba(197,165,90,0.18);
  border-radius: 14px;
  padding: 24px;
  text-align: center;
  cursor: pointer;
  transition: var(--transition);
  font-size: 0.85rem;
  font-family: var(--font-body);
  color: var(--theme-body);
}
[data-theme="light"] .file-drop-zone { border-color: rgba(0,0,0,0.12); }
.file-drop-zone:hover { border-color: var(--gold); color: var(--gold-light); background: rgba(197,165,90,0.06); }
.file-drop-zone.has-file { border-color: var(--gold); background: rgba(197,165,90,0.08); color: var(--gold-light); font-weight: 600; }

.upload-preview-box {
  margin-top: 12px;
  border-radius: 14px;
  overflow: hidden;
  border: 1px solid rgba(197,165,90,0.10);
  height: 280px;
  background: rgba(0,0,0,0.2);
  display: flex;
  flex-direction: column;
}
.upload-preview-box.upload-preview-hidden { display: none !important; }
.upload-preview-iframe {
  width: 100%;
  height: 100%;
  border: 0;
  background: #fff;
  border-radius: 14px;
}
.upload-preview-docx {
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  height: 100%; text-align: center; padding: 1.5rem;
  color: var(--theme-body); font-family: var(--font-body); font-size: 0.9rem;
}
.upload-preview-docx-content {
  overflow-y: auto; height: 100%; padding: 1rem 1.25rem;
  background: #fff; color: #1e293b;
  font-family: var(--font-body); font-size: 0.88rem; line-height: 1.7;
  direction: rtl; text-align: right; border-radius: 14px;
}
.upload-preview-docx-content p { margin: 0 0 0.5em; }
.upload-preview-docx-content table { border-collapse: collapse; width: 100%; margin: 0.5em 0; }
.upload-preview-docx-content td, .upload-preview-docx-content th { border: 1px solid #cbd5e1; padding: 4px 8px; }
.upload-preview-docx-content h1, .upload-preview-docx-content h2, .upload-preview-docx-content h3 { margin: 0.6em 0 0.3em; color: #0f172a; }
.upload-preview-docx-content ul, .upload-preview-docx-content ol { padding-right: 1.5em; margin: 0.3em 0; }

.btn-upload-submit {
  width: 100%;
  background: linear-gradient(135deg, var(--gold), var(--gold-light));
  color: #060B15;
  border: none;
  border-radius: 14px;
  padding: 13px;
  font-family: var(--font-body);
  font-size: 0.95rem;
  font-weight: 700;
  cursor: pointer;
  transition: var(--transition);
  margin-top: 4px;
  box-shadow: 0 2px 12px rgba(197,165,90,0.2);
}
.btn-upload-submit:hover { transform: translateY(-2px); box-shadow: 0 6px 24px rgba(197,165,90,0.3); }
.btn-upload-submit:disabled { background: var(--gray-200); color: var(--gray-400); cursor: not-allowed; box-shadow: none; }

.upload-note { font-size: 0.75rem; color: var(--gray-400); text-align: center; margin-top: 10px; }


/* ============================================================
   ADMIN
   ============================================================ */
.admin-login-wrap {
  min-height: 100vh;
  min-height: 100dvh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 40px;
}
.admin-login-card {
  background: var(--card-bg);
  border-radius: var(--radius-lg);
  padding: 48px;
  width: 100%;
  max-width: 400px;
  box-shadow: var(--shadow-lg);
  text-align: center;
}

@media (max-width: 640px) {
  .admin-login-wrap {
    align-items: flex-start;
    padding: calc(64px + env(safe-area-inset-top, 0px) + 20px) 16px 24px;
    min-height: 100dvh;
  }
  .admin-login-card {
    padding: 24px 18px;
    border-radius: var(--radius-3xl);
  }
}

.admin-stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}
.admin-stat-card {
  background: var(--card-bg);
  border: 1px solid rgba(197,165,90,0.08);
  border-radius: var(--radius);
  padding: 24px;
  text-align: center;
  transition: var(--transition);
}
.admin-stat-card:hover { border-color: rgba(197,165,90,0.18); }
.admin-stat-num {
  font-family: 'Playfair Display', var(--font-heading), serif;
  font-size: 2.2rem;
  font-weight: 700;
  color: var(--theme-heading);
  margin-bottom: 6px;
}
.admin-stat-label { font-size: 0.8rem; color: var(--theme-body); }
.admin-stat-num-accent { color: var(--gold-heading) !important; text-shadow: 0 0 20px rgba(197,165,90,0.2); }
[data-theme="light"] .admin-stat-num-accent { color: var(--theme-heading) !important; text-shadow: none; }

.pending-files-scroll-wrap {
  max-height: 420px;
  overflow-y: auto;
  overflow-x: hidden;
  padding-inline-end: 4px;
}
.pending-files-scroll-wrap::-webkit-scrollbar { width: 6px; }
.pending-files-scroll-wrap::-webkit-scrollbar-track { background: rgba(255,255,255,0.03); border-radius: 4px; }
.pending-files-scroll-wrap::-webkit-scrollbar-thumb { background: rgba(197,165,90,0.2); border-radius: 4px; }
.pending-files-scroll-wrap::-webkit-scrollbar-thumb:hover { background: rgba(197,165,90,0.35); }

.pending-card {
  background: var(--card-bg);
  border: 1px solid rgba(197,165,90,0.08);
  border-radius: var(--radius);
  padding: 20px;
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 12px;
  transition: var(--transition);
}
.pending-card:hover { border-color: rgba(197,165,90,0.18); }
.pending-info { flex: 1; min-width: 0; }
.pending-name { font-weight: 600; color: var(--navy); margin-bottom: 6px; }
.pending-meta { font-size: 0.78rem; color: var(--gray-400); }
.pending-details { display: flex; flex-wrap: wrap; gap: 4px 12px; margin-top: 4px; }
.pending-detail { font-size: 0.78rem; color: var(--gray-400); white-space: nowrap; }
.pending-detail b { color: var(--gold, #D4AF37); font-weight: 600; }
.pending-actions { display: flex; flex-wrap: wrap; gap: 8px; align-items: center; }

.btn-edit-pending {
  width: auto;
  min-width: 44px;
  height: auto;
  padding: 6px 12px;
  font-size: 0.8rem;
  font-weight: 600;
  border-radius: 8px;
  border: 1px solid var(--gold, #D4AF37);
  background: rgba(212,175,55,0.1);
  color: var(--gold, #D4AF37);
  cursor: pointer;
  white-space: nowrap;
  transition: var(--transition);
}
.btn-edit-pending:hover { background: rgba(212,175,55,0.2); }
.btn-approve {
  background: rgba(45,158,90,0.12);
  color: #34D399;
  border: 1px solid rgba(45,158,90,0.25);
  border-radius: 10px;
  padding: 7px 14px;
  font-family: var(--font-body);
  font-size: 0.82rem;
  font-weight: 700;
  cursor: pointer;
  transition: var(--transition);
}
.btn-approve:hover { background: #2d9e5a; color: white; border-color: #2d9e5a; }
.btn-see-all:disabled { opacity: 0.5; cursor: not-allowed; transform: none; }
.btn-reject {
  background: rgba(239,68,68,0.12);
  color: #f87171;
  border: 1px solid rgba(239,68,68,0.25);
  border-radius: 10px;
  padding: 7px 14px;
  font-family: var(--font-body);
  font-size: 0.82rem;
  font-weight: 700;
  cursor: pointer;
  transition: var(--transition);
}
.btn-reject:hover { background: #e74c3c; color: white; border-color: #e74c3c; }
.btn-delete {
  background: rgba(239,68,68,0.12);
  color: #f87171;
  border: 1px solid rgba(239,68,68,0.2);
  border-radius: 8px;
  padding: 5px 10px;
  font-family: var(--font-body);
  font-size: 0.78rem;
  cursor: pointer;
  transition: var(--transition);
}
.btn-delete:hover { background: #e74c3c; color: white; border-color: #e74c3c; }


/* ============================================================
   FOOTER
   ============================================================ */
footer, .theme-footer {
  background: var(--theme-nav-bg) !important;
  border-top: 1px solid rgba(197,165,90,0.06) !important;
  color: var(--theme-body) !important;
  text-align: center;
  padding: 2.5rem 2.5rem;
  font-size: 0.8rem;
  letter-spacing: 0.02em;
  transition: background 0.5s var(--ease), border-color 0.5s var(--ease), color 0.5s var(--ease);
}
[data-theme="dark"] footer, [data-theme="dark"] .theme-footer { background: rgba(6,11,21,0.95) !important; border-top-color: rgba(197,165,90,0.06) !important; }
footer a { color: var(--theme-body); text-decoration: none; transition: color 0.3s; }
[data-theme="dark"] footer a { color: rgba(232,230,225,0.65); }
footer a:hover { color: var(--gold-heading); }
footer span { color: var(--gold-heading); }
.footer-credit {
  margin-top: 6px;
  font-size: 0.75rem;
  opacity: 0.45;
  letter-spacing: 0.03em;
  transition: opacity 0.3s;
}
.footer-credit:hover { opacity: 0.75; }
.footer-credit span { color: var(--gold-light); font-weight: 600; }


/* ============================================================
   MISC
   ============================================================ */
.loading-spinner { text-align: center; color: var(--theme-body); padding: 40px; font-size: 0.9rem; font-family: var(--font-body); }
.toast {
  position: fixed;
  bottom: 32px;
  left: 50%;
  transform: translateX(-50%) translateY(100px);
  background: var(--slate-800);
  color: #E8E6E1;
  padding: 12px 24px;
  border-radius: 14px;
  font-size: 0.88rem;
  font-weight: 600;
  z-index: 999;
  transition: transform 0.3s var(--ease);
  white-space: nowrap;
  box-shadow: 0 8px 32px rgba(0,0,0,0.3);
}
[data-theme="light"] .toast { background: var(--theme-heading); color: #fff; }
.toast.show { transform: translateX(-50%) translateY(0); }
.toast.success { background: #059669; }
.toast.error { background: #dc2626; }

.skeleton-card,.skeleton-row{background:rgba(255,255,255,0.04);border-radius:14px;padding:16px;margin-bottom:10px;}
.sk{background:linear-gradient(90deg,rgba(197,165,90,0.06) 25%,rgba(197,165,90,0.12) 50%,rgba(197,165,90,0.06) 75%);background-size:200% 100%;animation:shimmer 1.5s infinite;border-radius:8px;height:14px;margin:6px 0;}
.sk-title{width:60%;height:18px;}.sk-line{width:90%;}.sk-badge{width:80px;height:22px;border-radius:20px;}.sk-short{width:40%;}

.theme-nav { background: var(--theme-nav-bg) !important; border-bottom: 1px solid var(--theme-nav-border) !important; }
.theme-bg { background-color: var(--theme-bg) !important; transition: background-color 0.5s var(--ease); }
main { background: var(--theme-bg) !important; }
.course-page-wrap { background: var(--theme-bg) !important; transition: background-color 0.5s var(--ease); }

/* Admin search */
#adminSearch {
  background: var(--card-bg);
  border: 1px solid rgba(197,165,90,0.10);
  color: var(--navy);
}
#adminSearch::placeholder { color: var(--gray-400); }


/* ============================================================
   THEME TOGGLE
   ============================================================ */
.theme-toggle {
  width: 44px; height: 44px;
  min-width: 44px; min-height: 44px;
  border-radius: 12px;
  border: 2px solid transparent;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  transition: var(--transition);
  flex-shrink: 0;
  padding: 0;
  position: relative;
  z-index: 5;
}
.theme-toggle .theme-icon-wrap { display: inline-flex; align-items: center; justify-content: center; line-height: 0; vertical-align: middle; }
.theme-toggle .theme-toggle-img { width: 24px; height: 24px; display: block; object-fit: contain; pointer-events: none; vertical-align: middle; }
.theme-toggle .theme-toggle-icon { width: 24px; height: 24px; display: block; pointer-events: none; vertical-align: middle; color: var(--gold-light, #DEC079); transition: color 0.3s, transform 0.3s; }
.theme-toggle:hover .theme-toggle-icon { transform: rotate(15deg) scale(1.1); }
html[data-theme="light"] .theme-toggle .theme-toggle-icon { color: #DEC079; }

html[data-theme="dark"] .theme-toggle {
  background: rgba(197, 165, 90, 0.12) !important;
  border-color: rgba(197, 165, 90, 0.25) !important;
}
html[data-theme="dark"] .theme-toggle:hover {
  background: rgba(197, 165, 90, 0.22) !important;
  border-color: rgba(197, 165, 90, 0.45) !important;
  transform: scale(1.05);
}

html[data-theme="light"] .theme-toggle {
  background: #0D1B2A !important;
  border-color: rgba(13, 27, 42, 0.8) !important;
}
html[data-theme="light"] .theme-toggle:hover {
  background: #1A365D !important;
  border-color: #0D1B2A !important;
  transform: scale(1.05);
}


/* ============================================================
   LIGHT THEME OVERRIDES
   ============================================================ */
[data-theme="light"] .hero {
  background: linear-gradient(180deg, #FAF7F2 0%, #F0EDE6 50%, #FAF7F2 100%);
}
[data-theme="light"] .hero::before {
  background: radial-gradient(ellipse, rgba(139,105,20,0.05) 0%, transparent 70%);
}
[data-theme="light"] .hero::after { display: none; }
[data-theme="light"] .hero-badge { color: var(--theme-body); opacity: 0.8; }
[data-theme="light"] .hero-title {
  background: linear-gradient(135deg, #0D1B2A, #1A365D, #8B6914);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
[data-theme="light"] .hero-title span { -webkit-text-fill-color: var(--gold-heading); }

[data-theme="light"] .search-wrapper {
  background: #FFFFFF;
  border: 1px solid rgba(0,0,0,0.08);
  box-shadow: 0 4px 24px rgba(0,0,0,0.06);
}
[data-theme="light"] .search-wrapper:focus-within {
  border-color: rgba(139,105,20,0.25);
  box-shadow: 0 8px 36px rgba(0,0,0,0.08), 0 0 0 3px rgba(139,105,20,0.06);
}
[data-theme="light"] .search-filter-select { color: var(--gold-heading); border-right-color: rgba(0,0,0,0.08); }
[data-theme="light"] .search-filter-select {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='10' height='6'%3E%3Cpath d='M0 0l5 6 5-6z' fill='%238B6914'/%3E%3C/svg%3E");
}
[data-theme="light"] .search-bar { color: var(--theme-body); }
[data-theme="light"] .search-bar::placeholder { color: #94a3b8; }
[data-theme="light"] .scroll-hint-text { color: var(--gold-heading); }
[data-theme="light"] .scroll-hint-arrow { color: var(--gold-heading); }

[data-theme="light"] .section-label { color: var(--gold-heading); }
[data-theme="light"] .section-title { color: var(--theme-heading); }
[data-theme="light"] .page-title { color: var(--theme-heading); }
[data-theme="light"] .page-subtitle { color: var(--theme-body); }

[data-theme="light"] .category-card { background: #FFFFFF; border-color: rgba(0,0,0,0.05); box-shadow: 0 4px 20px rgba(0,0,0,0.04); }
[data-theme="light"] .category-card:hover { box-shadow: 0 12px 40px rgba(0,0,0,0.08); }
[data-theme="light"] .category-name { color: var(--theme-heading); }
[data-theme="light"] .category-count { color: var(--theme-body); }

[data-theme="light"] .file-item { background: #FFFFFF; border-color: rgba(0,0,0,0.05); box-shadow: 0 2px 12px rgba(0,0,0,0.04); }
[data-theme="light"] .file-item:hover { box-shadow: 0 8px 32px rgba(0,0,0,0.07); }
[data-theme="light"] .file-name { color: var(--theme-heading); }
[data-theme="light"] .file-meta { color: var(--theme-body); }

[data-theme="light"] .courses-grid .course-card { background: #FFFFFF; border-color: rgba(0,0,0,0.05); box-shadow: 0 4px 20px rgba(0,0,0,0.04); }
[data-theme="light"] .courses-grid .course-card:hover { box-shadow: 0 12px 40px rgba(0,0,0,0.08); }
[data-theme="light"] .course-card-name { color: var(--theme-heading); }
[data-theme="light"] .course-card-meta, [data-theme="light"] .course-card-count { color: var(--theme-body); }

[data-theme="light"] .contributor-card { background: #FFFFFF; border-color: rgba(0,0,0,0.05); }
[data-theme="light"] .contributor-card:hover { box-shadow: 0 8px 32px rgba(0,0,0,0.07); }
[data-theme="light"] .contributor-name { color: var(--theme-heading); }
[data-theme="light"] .contributor-count { color: var(--theme-body); }

[data-theme="light"] .trending-label { color: var(--theme-body); }
[data-theme="light"] .trending-tag { color: rgba(0,0,0,0.4); border-bottom-color: rgba(0,0,0,0.15); }
[data-theme="light"] .trending-tag:hover { color: var(--gold-heading); border-bottom-color: var(--gold-heading); }

[data-theme="light"] .stat-number { color: var(--gold-heading); text-shadow: none; }
[data-theme="light"] .stat-label { color: var(--theme-body); }
[data-theme="light"] .stat-divider { background: rgba(0,0,0,0.08); }

[data-theme="light"] .btn-see-all, [data-theme="light"] .btn-clear-search { color: var(--theme-body); border-color: rgba(0,0,0,0.12); }
[data-theme="light"] .btn-see-all:hover, [data-theme="light"] .btn-clear-search:hover { background: var(--gold-heading); color: #fff; border-color: var(--gold-heading); }

[data-theme="light"] .modal { background: #FFFFFF; border-color: rgba(0,0,0,0.06); }
[data-theme="light"] .modal-header, [data-theme="light"] .modal-close { border-color: rgba(0,0,0,0.06); color: var(--theme-heading); }
[data-theme="light"] .form-control { background: #F8F7F4; border-color: rgba(0,0,0,0.08); color: var(--theme-body); }
[data-theme="light"] .form-control:focus { border-color: rgba(139,105,20,0.35); box-shadow: 0 0 0 3px rgba(139,105,20,0.06); }
[data-theme="light"] .file-drop-zone { border-color: rgba(0,0,0,0.12); color: var(--theme-body); }
[data-theme="light"] .toast { background: var(--theme-heading); color: #fff; }

[data-theme="light"] .page-header { background: linear-gradient(180deg, #EDE9E1 0%, #FAF7F2 100%); }
[data-theme="light"] .page-header .filter-select,
[data-theme="light"] .page-header .filter-input { color: var(--theme-body) !important; background: rgba(255,255,255,0.9) !important; border-color: rgba(0,0,0,0.10) !important; }
[data-theme="light"] .page-header .filter-input::placeholder { color: var(--theme-body); opacity: 0.6; }

[data-theme="light"] .course-page-wrap { background: var(--theme-bg); }
[data-theme="light"] .course-sidebar { background: #FFFFFF; border-color: rgba(0,0,0,0.05); }
[data-theme="light"] .course-sidebar-title { color: var(--gold-heading); }
[data-theme="light"] .course-card-title { color: var(--theme-heading); }
[data-theme="light"] .course-card-desc { color: var(--theme-body); }
[data-theme="light"] .course-filter-input, [data-theme="light"] .course-filter-select { background: #F8F7F4; border-color: rgba(0,0,0,0.08); color: var(--theme-body); }
[data-theme="light"] .course-tab-btn { background: #F8F7F4; border-color: rgba(0,0,0,0.08); color: var(--theme-body); }
[data-theme="light"] .course-tab-btn.course-tab-active { background: var(--gold-heading); color: #fff; border-color: var(--gold-heading); }
[data-theme="light"] .course-type-table th { background: rgba(0,0,0,0.03); color: var(--theme-heading); border-color: rgba(0,0,0,0.06); }
[data-theme="light"] .course-type-table td { color: var(--theme-body); border-color: rgba(0,0,0,0.04); }
[data-theme="light"] .course-type-table tr.course-file-highlight td { background: rgba(197,165,90,0.2); box-shadow: inset 0 0 0 2px rgba(197,165,90,0.4); }
[data-theme="light"] .course-panel-title { color: var(--theme-heading); }

[data-theme="light"] .filter-select, [data-theme="light"] .filter-input { background: #F8F7F4 !important; border-color: rgba(0,0,0,0.08) !important; color: var(--theme-body) !important; }
[data-theme="light"] .filter-input::placeholder { color: #475569 !important; opacity: 0.8; }
[data-theme="light"] .filter-select option { background: #fff !important; color: #1e293b !important; }
[data-theme="light"] .dark-card .filter-input,
[data-theme="light"] .dark-card .filter-select { color: #1e293b !important; background: #F8F7F4 !important; border-color: rgba(0,0,0,0.10) !important; }
[data-theme="light"] .dark-card .filter-input::placeholder { color: #64748b !important; }

[data-theme="light"] .files-table th { background: rgba(0,0,0,0.03); color: var(--theme-heading); }
[data-theme="light"] .files-table td { color: var(--theme-body); }

[data-theme="light"] .admin-login-wrap { background: var(--theme-bg); }
[data-theme="light"] .admin-login-card { background: #FFFFFF !important; border-color: rgba(0,0,0,0.06) !important; color: var(--theme-body); }
[data-theme="light"] .admin-login-card .section-label,
[data-theme="light"] .admin-login-card .page-title { color: var(--theme-heading) !important; }
[data-theme="light"] .admin-login-card .form-control { background: #F8F7F4 !important; border-color: rgba(0,0,0,0.10) !important; color: var(--theme-body) !important; }
[data-theme="light"] .admin-stat-card { border-color: rgba(0,0,0,0.05); background: #FFFFFF !important; }
[data-theme="light"] #adminPanel { background: var(--theme-bg) !important; }
[data-theme="light"] #adminPanel .dark-card { background: #FFFFFF !important; border-color: rgba(0,0,0,0.05) !important; }
[data-theme="light"] #adminPanel .section-label,
[data-theme="light"] #adminPanel .section-title { color: var(--theme-heading) !important; }
[data-theme="light"] #adminPanel .btn-see-all { color: var(--theme-body) !important; border-color: rgba(0,0,0,0.15) !important; background: transparent !important; }
[data-theme="light"] #adminPanel .btn-see-all:hover { background: var(--gold-heading) !important; color: #fff !important; border-color: var(--gold-heading) !important; }
[data-theme="light"] #adminPanel #adminSearch,
[data-theme="light"] #adminPanel .filter-input { background: #F8F7F4 !important; border-color: rgba(0,0,0,0.10) !important; color: var(--theme-body) !important; }
[data-theme="light"] #adminPanel .files-table-wrap { border-color: rgba(0,0,0,0.06) !important; }
[data-theme="light"] #adminPanel #pendingFiles p { color: var(--theme-body) !important; }
[data-theme="light"] .pending-card { background: #FFFFFF !important; border-color: rgba(0,0,0,0.05) !important; }
[data-theme="light"] .pending-name { color: var(--theme-heading) !important; }
[data-theme="light"] .pending-meta { color: var(--theme-body) !important; }
[data-theme="light"] .pending-detail { color: var(--theme-body) !important; }
[data-theme="light"] .pending-detail b { color: var(--gold-heading) !important; }
[data-theme="light"] .preview-panel { background: #FFFFFF; }
[data-theme="light"] .preview-header { border-color: rgba(0,0,0,0.06); color: var(--theme-heading); background: #FFFFFF; }
[data-theme="light"] .loading-spinner { color: var(--theme-body); }
[data-theme="light"] .course-breadcrumbs a { color: var(--theme-heading); }
[data-theme="light"] .course-breadcrumbs a:hover { color: var(--gold-heading); }
[data-theme="light"] .course-bread-sep { color: var(--theme-body); }
[data-theme="light"] .back-link { color: var(--theme-body); }


/* ============================================================
   ADMIN PAGINATION
   ============================================================ */
.admin-pag-btn { padding: 8px 18px; border-radius: 10px; border: 1.5px solid; cursor: pointer; font-weight: 600; transition: background 0.2s, border-color 0.2s; }
.admin-pag-btn[disabled] { opacity: 0.4; cursor: not-allowed; }
.admin-pag-info { color: var(--gray-400); font-size: 0.9rem; }

html[data-theme="light"] .admin-pag-prev { background: #fff !important; color: #0D1B2A !important; border-color: #0D1B2A !important; }
html[data-theme="light"] .admin-pag-next { background: #0D1B2A !important; color: #fff !important; border-color: #0D1B2A !important; }
html[data-theme="light"] .admin-pag-info { color: #64748b !important; }

html[data-theme="dark"] .admin-pag-prev { background: rgba(232,230,225,0.08) !important; color: #E8E6E1 !important; border-color: rgba(232,230,225,0.25) !important; }
html[data-theme="dark"] .admin-pag-prev:not([disabled]):hover { background: rgba(232,230,225,0.15) !important; border-color: rgba(232,230,225,0.4) !important; }
html[data-theme="dark"] .admin-pag-next { background: rgba(197,165,90,0.25) !important; color: #E8E6E1 !important; border-color: rgba(197,165,90,0.5) !important; }
html[data-theme="dark"] .admin-pag-next:not([disabled]):hover { background: rgba(197,165,90,0.4) !important; border-color: var(--gold) !important; }
html[data-theme="dark"] .admin-pag-info { color: #8892A2 !important; }


/* ============================================================
   RESPONSIVE — Mobile/Tablet (< 1024px)
   ============================================================ */
@media (max-width: 1023px) {
  nav {
    padding: 0 1rem;
    padding-left: max(1rem, env(safe-area-inset-left));
    padding-right: max(1rem, env(safe-area-inset-right));
    padding-top: env(safe-area-inset-top, 0);
    min-height: 64px;
  }
  nav::after { left: 5%; right: 5%; }

  .nav-toggle { display: flex !important; }
  .nav-links {
    display: none;
    position: fixed;
    top: calc(64px + env(safe-area-inset-top, 0px));
    right: 0;
    width: min(280px, 85vw);
    height: calc(100dvh - 64px - env(safe-area-inset-top, 0px));
    background: rgba(6, 11, 21, 0.97);
    backdrop-filter: blur(32px) saturate(1.4);
    border-left: 1px solid rgba(197,165,90,0.08);
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 1rem 0;
    box-shadow: -4px 0 32px rgba(0,0,0,0.4);
    z-index: 99;
    transform: translateX(100%);
    transition: transform 0.35s var(--ease-out);
    overflow-y: auto;
    -webkit-overflow-scrolling: touch;
  }
  body.nav-open .nav-links { display: flex !important; transform: translateX(0); }
  body.nav-open .nav-backdrop { display: block !important; }
  body.nav-open { overflow: hidden; }
  .nav-backdrop { top: calc(64px + env(safe-area-inset-top, 0px)); }
  .nav-links li { margin: 0; padding: 0; border-bottom: 1px solid rgba(197,165,90,0.05); }
  [data-theme="light"] .nav-links { background: rgba(250,247,242,0.97); border-left-color: rgba(0,0,0,0.06); }
  [data-theme="light"] .nav-links li { border-bottom-color: rgba(0,0,0,0.04); }
  .nav-links a, .nav-links .nav-admin, .nav-links .theme-toggle {
    display: block;
    padding: 1rem 1.25rem;
    min-height: 52px;
    min-width: 100%;
    box-sizing: border-box;
    touch-action: manipulation;
    -webkit-tap-highlight-color: transparent;
    cursor: pointer;
  }
  .nav-links a::after { display: none; }
  .nav-links .theme-toggle { width: 100%; text-align: right; border-radius: 0; border: none; background: transparent; }
  .nav-brand .nav-title { font-size: 1.1rem; }

  .hero { padding: 4.5rem 1rem 3.5rem; min-height: auto; }
  .hero-content { max-width: 100%; }
  .hero-logo { height: 48px; margin-bottom: 1rem; }
  .hero-badge { font-size: 0.65rem; margin-bottom: 0.75rem; }
  .hero-title { font-size: clamp(1.85rem, 8vw, 2.5rem); margin-bottom: 1.5rem; }

  .search-container { max-width: 100%; margin-bottom: 1.25rem; }
  .search-wrapper {
    height: 50px;
    padding: 0 5px 0 12px;
    border-radius: 999px;
  }
  .search-bar { font-size: 0.88rem; padding: 0 6px; }
  .search-filter-select { min-width: 62px; font-size: 0.75rem; padding-right: 6px; }
  .search-btn { width: 40px; height: 40px; min-width: 40px; }
  .search-btn svg { width: 18px; height: 18px; }
  .scroll-hint { margin-top: 1.5rem; }
  .scroll-hint-text { font-size: 0.72rem; }

  .trending { flex-wrap: wrap; gap: 6px 10px; justify-content: center; }
  .trending-label { display: none; }
  .trending-tag { font-size: 0.72rem; padding: 3px 0; }

  .hero-stats { flex-wrap: wrap; gap: 1rem; justify-content: center; }
  .stat-divider { display: none; }
  .stat { min-width: 80px; text-align: center; }

  .section-inner { padding: 0 1rem; }
  .section-header { flex-direction: column; align-items: stretch; gap: 1rem; margin-bottom: 1.5rem; }
  .section-title { font-size: 1.4rem; }
  .section-label { font-size: 0.6rem; }

  .categories-section { padding: 2.5rem 0; }
  .courses-grid { grid-template-columns: 1fr; gap: 0.75rem; }
  .course-card { padding: 1.25rem 1rem; }
  .categories-grid { grid-template-columns: repeat(2, 1fr); gap: 0.75rem; }
  .category-card { padding: 1.25rem 1rem; }
  .category-icon { font-size: 1.5rem; }
  .category-name { font-size: 0.85rem; }

  .files-section { padding: 0 0 3rem; }
  .file-item { padding: 0.85rem 1rem; gap: 0.75rem; flex-wrap: wrap; }
  .file-icon { width: 36px; height: 36px; font-size: 1rem; }
  .file-name { font-size: 0.85rem; }

  .contributors-inner { padding: 0 1rem; }
  .contributors-grid { gap: 0.75rem; }
  .contributor-card { min-width: 140px; padding: 0.85rem 1rem; }

  .page-header { padding: 2rem 0; }
  .page-title { font-size: 1.5rem; }
  .page-subtitle { font-size: 0.85rem; }

  .filter-bar { flex-direction: column; gap: 0.75rem; align-items: stretch; }
  .filter-select, .filter-input { width: 100%; min-width: 0; }
  .btn-upload-small { width: 100%; min-height: 44px; }

  .files-table-wrap { margin: 0 -1rem; border-radius: 0; border-left: none; border-right: none; overflow-x: auto; -webkit-overflow-scrolling: touch; }
  .files-table th, .files-table td { padding: 10px 12px; font-size: 0.78rem; }
  .td-actions { flex-wrap: wrap; gap: 4px; }
  .btn-icon, .btn-download { min-width: 44px; min-height: 44px; padding: 10px; }

  .pagination-bar { gap: 8px; margin-top: 1rem; padding: 0 1rem; }
  .pagination-btn, .pagination-num { min-height: 44px; min-width: 44px; padding: 10px 14px; font-size: 0.82rem; }
  .pagination-num { min-width: 44px; }
  .pagination-info { width: 100%; text-align: center; margin: 8px 0 0; font-size: 0.8rem; }

  .course-tab-btn { min-height: 44px; padding: 0.75rem 1rem; }
  .course-pag-btn, .course-pag-num { min-height: 44px; min-width: 44px; padding: 0.6rem 0.85rem; }
  .course-td-actions .course-tbl-btn, .course-td-actions .course-tbl-dl { min-width: 44px; min-height: 44px; }
  .course-curriculum-btn { min-height: 44px; padding: 0.85rem 1rem; }
  .trending-tag { min-height: auto; }

  /* Pending files cards — mobile layout */
  .pending-card {
    flex-direction: column;
    align-items: stretch;
    gap: 10px;
    padding: 14px;
  }
  .pending-card .file-icon { align-self: flex-start; }
  .pending-name { font-size: 0.9rem; word-break: break-word; }
  .pending-details { gap: 3px 10px; }
  .pending-detail { font-size: 0.75rem; white-space: normal; }
  .pending-actions {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 8px;
    width: 100%;
  }
  .pending-actions .btn-approve,
  .pending-actions .btn-reject,
  .pending-actions .btn-edit-pending,
  .pending-actions .btn-icon {
    min-height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.85rem;
    width: 100%;
    box-sizing: border-box;
  }

  .admin-search-bar { flex-direction: column; }
  .admin-search-bar input { width: 100%; }
  .admin-search-bar button { width: 100%; min-height: 44px; }
  .admin-stats-grid { grid-template-columns: repeat(2, 1fr); gap: 10px; }
  .admin-stat-card { padding: 14px 10px; }
  .admin-stat-num { font-size: 1.5rem; }

  /* Preview: bottom-sheet full screen on mobile */
  .preview-panel {
    left: 0;
    top: auto;
    bottom: 0;
    width: 100%;
    height: min(100dvh, 100vh);
    transform: translateY(100%);
    border-radius: 20px 20px 0 0;
    overflow: hidden;
    box-shadow: 0 -12px 48px rgba(0,0,0,0.4);
    transition: transform 0.25s cubic-bezier(0.32, 0.72, 0, 1);
    will-change: transform;
  }
  .preview-panel.open { transform: translateY(0); }
  .preview-header {
    position: sticky;
    top: 0;
    z-index: 2;
    background: var(--card-bg);
    padding-top: calc(14px + env(safe-area-inset-top, 0px));
  }
  .preview-panel { padding-bottom: env(safe-area-inset-bottom, 0px); }
  .preview-loading {
    top: 0;
    padding-top: calc(56px + env(safe-area-inset-top, 0px));
  }
  .preview-iframe-wrap { min-height: 0; overflow: auto; -webkit-overflow-scrolling: touch; }
  .preview-iframe { min-height: 0; }
  .preview-header, .modal-header { padding: 14px 1rem; }
  .preview-close, .modal-close { min-width: 44px; min-height: 44px; display: inline-flex; align-items: center; justify-content: center; }

  .modal-overlay { padding: 1rem; align-items: flex-end; cursor: pointer; }
  .modal-overlay > * { cursor: default; }
  .modal { max-height: 85vh; border-radius: var(--radius-lg) var(--radius-lg) 0 0; }
  .modal-body { padding: 1.25rem; }
  .form-control, .btn-upload-submit { min-height: 44px; }
  .file-drop-zone { min-height: 120px; padding: 1.5rem; }

  .admin-stats-grid { grid-template-columns: repeat(2, 1fr); gap: 0.75rem; }
  .btn-see-all { width: 100%; text-align: center; }
  .btn-clear-search { width: 100%; min-height: 44px; }

  main { padding-left: env(safe-area-inset-left, 0); padding-right: env(safe-area-inset-right, 0); padding-bottom: env(safe-area-inset-bottom, 0); }
  .course-page-wrap { padding-left: max(1rem, env(safe-area-inset-left)); padding-right: max(1rem, env(safe-area-inset-right)); padding-bottom: calc(2rem + env(safe-area-inset-bottom, 0)); }
  .course-card-header { padding: 1.25rem 1rem 0; }
  .course-filters { padding: 1rem 1rem 0; flex-direction: column; gap: 0.75rem; }
  .course-filter-input, .course-filter-select { width: 100%; min-width: 0; }
  .course-btn-upload { width: 100%; min-height: 44px; }
  .course-content { padding: 1rem; overflow-x: hidden; }
  .course-main { overflow-x: hidden; max-width: 100%; }
  .course-table-wrap { width: 100%; max-width: 100%; overflow-x: auto; -webkit-overflow-scrolling: touch; display: block; margin: 0 -0.5rem; border-radius: 12px; }
  .course-type-table { min-width: 320px; font-size: 0.8rem; }
  .course-type-table th, .course-type-table td { padding: 0.5rem 0.4rem; }
  .course-sidebar { margin-left: 0; margin-right: 0; }
  .admin-files-section .dark-card { padding: 1rem; }
  #uploadLimitInput { max-width: 100%; }
}

@media (max-width: 576px) {
  nav { padding: 0 max(0.75rem, env(safe-area-inset-left)); padding-right: max(0.75rem, env(safe-area-inset-right)); }
  .categories-grid { grid-template-columns: 1fr; }
  .category-card { padding: 1rem 1.25rem; }
  .hero-title { font-size: 1.65rem; }
  .section-title { font-size: 1.25rem; }
  .page-title { font-size: 1.35rem; }
  .contributor-card { min-width: 100%; }
  .pagination-bar { flex-wrap: wrap; justify-content: center; }
  .course-breadcrumbs { padding: 0 0.5rem; font-size: 0.85rem; }
  .course-progress-wrap { padding: 0 0.5rem; }
  .files-table-wrap { margin-left: -0.5rem; margin-right: -0.5rem; }
  .td-name { max-width: 120px; }
  .course-table-wrap { margin: 0 -0.25rem; }
  .course-type-table { font-size: 0.75rem; }
  .course-type-table th, .course-type-table td { padding: 0.4rem 0.35rem; }
}

/* Prevent horizontal scroll on mobile */
html { overflow-x: hidden; }
body { overflow-x: hidden; }