/* ============================================================
   LMS — MAIN STYLESHEET (Dark Mode Premium Overhaul)
   ============================================================ */

/* Google Fonts */
@import url('https://fonts.googleapis.com/css2?family=Plus+Jakarta+Sans:wght@300;400;500;600;700;800;900&family=Inter:wght@300;400;500;600;700;800;900&display=swap');

/* ============================================================
   DESIGN TOKENS
   ============================================================ */
:root {
  /* Colors */
  --bg-primary:    #04040a;
  --bg-secondary:  #0a0a16;
  --bg-card:       rgba(21, 21, 42, 0.4);
  --bg-glass:      rgba(255, 255, 255, 0.02);
  --bg-glass-hover:rgba(255, 255, 255, 0.05);

  --accent:        #8b5cf6;
  --accent-light:  #a78bfa;
  --accent-dark:   #6d28d9;
  --accent-glow:   rgba(139, 92, 246, 0.15);

  --success:       #10b981;
  --warning:       #f59e0b;
  --danger:        #ef4444;
  --info:          #3b82f6;

  --text-primary:  #f8fafc;
  --text-secondary:#94a3b8;
  --text-muted:    #64748b;
  --border:        rgba(255, 255, 255, 0.05);
  --border-accent: rgba(139, 92, 246, 0.25);

  /* Gradients */
  --gradient-hero:    radial-gradient(circle at 50% 0%, #1a103c 0%, #04040a 70%);
  --gradient-accent:  linear-gradient(135deg, #8b5cf6 0%, #3b82f6 100%);
  --gradient-card:    linear-gradient(145deg, rgba(21, 21, 42, 0.6), rgba(15, 15, 28, 0.4));
  --gradient-success: linear-gradient(135deg, #059669, #10b981);

  /* Spacing */
  --radius:    14px;
  --radius-lg: 18px;
  --radius-xl: 26px;

  /* Shadows */
  --shadow-card:   0 15px 35px -12px rgba(0,0,0,0.5);
  --shadow-accent: 0 10px 25px -8px rgba(139, 92, 246, 0.35);
  --shadow-glow:   0 0 40px -5px rgba(139, 92, 246, 0.15);

  /* Transitions */
  --transition: 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
}

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

html { scroll-behavior: smooth; }

body {
  font-family: 'Inter', sans-serif;
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.65;
  min-height: 100vh;
  overflow-x: hidden;
}

a { color: var(--accent-light); text-decoration: none; transition: color var(--transition); }
a:hover { color: #fff; }
img { max-width: 100%; display: block; }
ul { list-style: none; }

h1,h2,h3,h4,h5,h6 {
  font-family: 'Plus Jakarta Sans', sans-serif;
  font-weight: 700;
  line-height: 1.25;
  color: var(--text-primary);
  letter-spacing: -0.02em;
}

/* ============================================================
   SCROLLBAR
   ============================================================ */
::-webkit-scrollbar { width: 8px; height: 8px; }
::-webkit-scrollbar-track { background: var(--bg-primary); }
::-webkit-scrollbar-thumb { background: rgba(255, 255, 255, 0.1); border-radius: 99px; border: 2px solid var(--bg-primary); }
::-webkit-scrollbar-thumb:hover { background: var(--accent); }

/* ============================================================
   NAVBAR
   ============================================================ */
.navbar {
  position: sticky;
  top: 0;
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 5%;
  height: 76px;
  background: rgba(4, 4, 10, 0.7);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border);
  transition: all var(--transition);
  box-shadow: 0 4px 30px rgba(0, 0, 0, 0.15);
}

.navbar-brand {
  display: flex;
  align-items: center;
  gap: 12px;
  font-family: 'Plus Jakarta Sans', sans-serif;
  font-size: 1.35rem;
  font-weight: 800;
  color: #fff;
  letter-spacing: -0.03em;
}

.navbar-brand .logo-icon {
  width: 38px; height: 38px;
  background: var(--gradient-accent);
  border-radius: 10px;
  display: flex; align-items: center; justify-content: center;
  font-size: 1rem; color: #fff;
  box-shadow: var(--shadow-accent);
}

.navbar-nav {
  display: flex;
  align-items: center;
  gap: 6px;
}

.navbar-nav a {
  padding: 8px 18px;
  border-radius: 99px;
  color: var(--text-secondary);
  font-weight: 500;
  font-size: 0.92rem;
  transition: all var(--transition);
}

.navbar-nav a:hover {
  color: #fff;
  background: var(--bg-glass-hover);
}

.navbar-nav a.active {
  color: #fff;
  background: rgba(139, 92, 246, 0.15);
  box-shadow: inset 0 0 12px rgba(139, 92, 246, 0.1);
  border: 1px solid rgba(139, 92, 246, 0.2);
}

.navbar-actions {
  display: flex;
  align-items: center;
  gap: 12px;
}

.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: 8px;
}
.hamburger span {
  display: block;
  width: 24px; height: 2px;
  background: var(--text-primary);
  border-radius: 2px;
  transition: all var(--transition);
}

/* ============================================================
   BUTTONS
   ============================================================ */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 22px;
  border-radius: var(--radius);
  border: none;
  cursor: pointer;
  font-family: 'Plus Jakarta Sans', sans-serif;
  font-weight: 600;
  font-size: 0.92rem;
  transition: all var(--transition);
  text-decoration: none;
  white-space: nowrap;
}

.btn-primary {
  background: var(--gradient-accent);
  color: #fff;
  box-shadow: var(--shadow-accent);
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 30px rgba(139, 92, 246, 0.4);
  filter: brightness(1.1);
  color: #fff;
}
.btn-primary:active {
  transform: translateY(0);
  filter: brightness(0.95);
}

.btn-secondary {
  background: var(--bg-glass);
  color: var(--text-primary);
  border: 1px solid var(--border);
}
.btn-secondary:hover {
  background: var(--bg-glass-hover);
  border-color: rgba(255, 255, 255, 0.15);
  color: #fff;
  transform: translateY(-1px);
}
.btn-secondary:active {
  transform: translateY(0);
}

.btn-success {
  background: var(--gradient-success);
  color: #fff;
  box-shadow: 0 4px 20px rgba(16,185,129,0.3);
}
.btn-success:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(16,185,129,0.4);
  color: #fff;
}
.btn-success:active { transform: translateY(0); }

.btn-danger {
  background: linear-gradient(135deg, #dc2626, #ef4444);
  color: #fff;
}
.btn-danger:hover {
  transform: translateY(-1px);
  box-shadow: 0 4px 16px rgba(239, 68, 68, 0.3);
  color: #fff;
}
.btn-danger:active { transform: translateY(0); }

.btn-outline {
  background: transparent;
  color: var(--accent-light);
  border: 1.5px solid var(--accent-light);
}
.btn-outline:hover {
  background: var(--accent);
  color: #fff;
  border-color: var(--accent);
  box-shadow: var(--shadow-accent);
}
}

.btn-sm { padding: 7px 16px; font-size: 0.83rem; }
.btn-lg { padding: 14px 32px; font-size: 1.05rem; }
.btn-full { width: 100%; justify-content: center; }

.btn:disabled { opacity: 0.5; cursor: not-allowed; transform: none !important; }

/* ============================================================
   HERO SECTION
   ============================================================ */
.hero {
  position: relative;
  min-height: 92vh;
  display: flex;
  align-items: center;
  padding: 80px 5% 80px;
  background: var(--gradient-hero);
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: -30%;
  right: -10%;
  width: 700px; height: 700px;
  background: radial-gradient(circle, rgba(124,58,237,0.15) 0%, transparent 70%);
  pointer-events: none;
}
.hero::after {
  content: '';
  position: absolute;
  bottom: -20%;
  left: -10%;
  width: 500px; height: 500px;
  background: radial-gradient(circle, rgba(59,130,246,0.12) 0%, transparent 70%);
  pointer-events: none;
}

.hero-content {
  position: relative;
  z-index: 1;
  max-width: 640px;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 18px;
  background: rgba(139, 92, 246, 0.12);
  border: 1px solid rgba(139, 92, 246, 0.25);
  border-radius: 99px;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--accent-light);
  margin-bottom: 24px;
  animation: fadeDown 0.8s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

.hero h1 {
  font-size: clamp(2.2rem, 5vw, 3.8rem);
  font-weight: 900;
  line-height: 1.1;
  margin-bottom: 24px;
  animation: fadeUp 0.9s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

.hero h1 span {
  background: var(--gradient-accent);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero p {
  font-size: 1.1rem;
  color: var(--text-secondary);
  margin-bottom: 36px;
  animation: fadeUp 1s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

.hero-actions {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  animation: fadeUp 1.1s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

.hero-stats {
  display: flex;
  gap: 32px;
  margin-top: 48px;
  animation: fadeUp 1.2s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

.hero-stat .num {
  font-size: 1.8rem;
  font-weight: 800;
  background: var(--gradient-accent);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-stat .label {
  font-size: 0.82rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.hero-visual {
  position: absolute;
  right: 5%;
  top: 50%;
  transform: translateY(-50%);
  display: grid;
  grid-template-columns: repeat(2, 200px);
  gap: 16px;
  animation: fadeIn 1s ease;
}

/* ============================================================
   SECTION STYLES
   ============================================================ */
section { padding: 80px 5%; }

.section-header {
  text-align: center;
  margin-bottom: 56px;
}
.section-header h2 {
  font-size: clamp(1.8rem, 3vw, 2.6rem);
  font-weight: 800;
  margin-bottom: 12px;
}
.section-header h2 span {
  background: var(--gradient-accent);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.section-header p {
  color: var(--text-secondary);
  font-size: 1rem;
  max-width: 500px;
  margin: 0 auto;
}

/* ============================================================
   COURSE CARD
   ============================================================ */
.courses-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 28px;
}

.course-card {
  background: var(--bg-card);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: all var(--transition);
  position: relative;
  box-shadow: var(--shadow-card);
  display: flex;
  flex-direction: column;
  height: 100%;
}

.course-card:hover {
  transform: translateY(-8px);
  border-color: var(--border-accent);
  box-shadow: var(--shadow-glow), 0 20px 40px -15px rgba(0,0,0,0.7);
}

.course-thumb {
  width: 100%;
  height: 185px;
  object-fit: cover;
  background: linear-gradient(135deg, #15152a, #2d1b5e);
  transition: transform var(--transition);
}

.course-card:hover .course-thumb {
  transform: scale(1.05);
}

.course-thumb-placeholder {
  width: 100%;
  height: 185px;
  background: linear-gradient(135deg, #15152a, #2d1b5e);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 3rem;
  color: var(--accent);
  transition: transform var(--transition);
}
.course-card:hover .course-thumb-placeholder {
  transform: scale(1.05);
}

.course-body {
  padding: 22px;
  display: flex;
  flex-direction: column;
  flex-grow: 1;
}

.course-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 12px;
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 12px;
  border-radius: 99px;
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}
.badge-category { background: rgba(139, 92, 246, 0.15); color: var(--accent-light); }
.badge-level    { background: rgba(245, 158, 11, 0.12); color: #fbbf24; }
.badge-free     { background: rgba(16, 185, 129, 0.15); color: #34d399; }

.course-title {
  font-size: 1.05rem;
  font-weight: 700;
  line-height: 1.4;
  margin-bottom: 12px;
  color: #fff;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  font-family: 'Plus Jakarta Sans', sans-serif;
  transition: color var(--transition);
}
.course-card:hover .course-title {
  color: var(--accent-light);
}

.course-instructor {
  font-size: 0.82rem;
  color: var(--text-muted);
  margin-bottom: 14px;
  margin-top: auto;
}
.course-instructor i { color: var(--accent-light); margin-right: 6px; }

.course-rating {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 0.82rem;
  margin-bottom: 18px;
}
.stars { color: #f59e0b; letter-spacing: 1px; }
.rating-count { color: var(--text-muted); }

.course-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 16px;
  border-top: 1px solid var(--border);
  margin-top: auto;
}

.course-price {
  font-size: 1.25rem;
  font-weight: 800;
  background: var(--gradient-accent);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.course-students {
  font-size: 0.8rem;
  color: var(--text-muted);
}
.course-students i { color: var(--accent-light); margin-right: 4px; }

/* ============================================================
   CATEGORIES
   ============================================================ */
.categories-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
  gap: 20px;
}

.category-card {
  background: var(--bg-card);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 32px 20px;
  text-align: center;
  cursor: pointer;
  transition: all var(--transition);
  box-shadow: var(--shadow-card);
}
.category-card:hover {
  background: var(--bg-glass-hover);
  border-color: var(--border-accent);
  transform: translateY(-6px);
  box-shadow: var(--shadow-glow);
}
.category-card .icon {
  width: 56px; height: 56px;
  background: var(--gradient-accent);
  border-radius: 16px;
  display: flex; align-items: center; justify-content: center;
  font-size: 1.4rem; color: #fff;
  margin: 0 auto 16px;
  box-shadow: var(--shadow-accent);
  transition: transform var(--transition);
}
.category-card:hover .icon {
  transform: scale(1.1) rotate(4deg);
}
.category-card h4 { font-family: 'Plus Jakarta Sans', sans-serif; font-size: 0.95rem; font-weight: 600; color: #fff; }
.category-card p  { font-size: 0.78rem; color: var(--text-muted); margin-top: 6px; }

/* ============================================================
   FORMS
   ============================================================ */
.form-group { margin-bottom: 22px; }

.form-label {
  display: block;
  margin-bottom: 8px;
  font-weight: 600;
  font-size: 0.88rem;
  color: var(--text-secondary);
  font-family: 'Plus Jakarta Sans', sans-serif;
}

.form-control {
  width: 100%;
  padding: 12px 18px;
  background: rgba(255, 255, 255, 0.02);
  border: 1.5px solid var(--border);
  border-radius: var(--radius);
  color: var(--text-primary);
  font-family: 'Inter', sans-serif;
  font-size: 0.95rem;
  transition: all var(--transition);
  outline: none;
  -webkit-appearance: none;
}
.form-control:focus {
  border-color: var(--accent);
  background: rgba(139, 92, 246, 0.03);
  box-shadow: 0 0 0 4px rgba(139, 92, 246, 0.15);
}
.form-control::placeholder { color: var(--text-muted); }

select.form-control {
  -webkit-appearance: none;
  -moz-appearance: none;
  appearance: none;
  cursor: pointer;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='24' height='24' viewBox='0 0 24 24' fill='none' stroke='%2394a3b8' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 14px center;
  background-size: 16px;
  padding-right: 40px;
}
select.form-control option {
  background-color: #0a0a16;
  color: #f8fafc;
}
textarea.form-control { resize: vertical; min-height: 120px; }

.form-hint {
  margin-top: 6px;
  font-size: 0.8rem;
  color: var(--text-muted);
}
.form-error {
  margin-top: 6px;
  font-size: 0.82rem;
  color: var(--danger);
}

/* ============================================================
   AUTH PAGES
   ============================================================ */
.auth-page {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 60px 20px;
  background: var(--gradient-hero);
  position: relative;
}

.auth-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  padding: 48px 44px;
  width: 100%;
  max-width: 460px;
  box-shadow: var(--shadow-card), var(--shadow-glow);
  animation: fadeUp 0.5s ease;
  backdrop-filter: blur(10px);
}

.auth-card .logo { text-align: center; margin-bottom: 32px; }
.auth-card .logo .brand {
  font-size: 1.5rem; font-weight: 800;
  display: flex; align-items: center; justify-content: center; gap: 10px;
}
.auth-card .logo .icon {
  width: 40px; height: 40px;
  background: var(--gradient-accent);
  border-radius: 12px;
  display: flex; align-items: center; justify-content: center;
  color: #fff; font-size: 1.1rem;
  box-shadow: var(--shadow-accent);
}
.auth-card h2 { font-size: 1.6rem; margin-bottom: 6px; }
.auth-card .subtitle { color: var(--text-muted); font-size: 0.9rem; margin-bottom: 32px; }
.auth-divider {
  text-align: center;
  color: var(--text-muted);
  font-size: 0.85rem;
  margin: 20px 0;
  position: relative;
}
.auth-divider::before, .auth-divider::after {
  content: '';
  position: absolute;
  top: 50%;
  width: 40%;
  height: 1px;
  background: var(--border);
}
.auth-divider::before { left: 0; }
.auth-divider::after { right: 0; }

/* ============================================================
   FLASH MESSAGES
   ============================================================ */
.flash {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 14px 18px;
  border-radius: var(--radius);
  margin-bottom: 20px;
  font-size: 0.9rem;
  font-weight: 500;
  animation: slideDown 0.3s ease;
}
.flash-success { background: rgba(16,185,129,0.15); border: 1px solid rgba(16,185,129,0.3); color: #34d399; }
.flash-error   { background: rgba(239,68,68,0.15);  border: 1px solid rgba(239,68,68,0.3);  color: #f87171; }
.flash-info    { background: rgba(59,130,246,0.15); border: 1px solid rgba(59,130,246,0.3); color: #93c5fd; }
.flash-warning { background: rgba(245,158,11,0.15); border: 1px solid rgba(245,158,11,0.3); color: #fbbf24; }

/* ============================================================
   COURSE DETAIL PAGE
   ============================================================ */
.course-detail-hero {
  background: linear-gradient(135deg, #0d0d1a 0%, #1a0a3a 100%);
  padding: 60px 5% 50px;
  border-bottom: 1px solid var(--border);
}
.course-detail-hero .breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.82rem;
  color: var(--text-muted);
  margin-bottom: 20px;
}
.course-detail-hero .breadcrumb a { color: var(--accent-light); }
.course-detail-hero .breadcrumb i { font-size: 0.6rem; }

.course-detail-grid {
  display: grid;
  grid-template-columns: 1fr 360px;
  gap: 40px;
  padding: 50px 5%;
  max-width: 1280px;
  margin: 0 auto;
}

.course-sidebar {
  position: sticky;
  top: 90px;
  align-self: start;
}
.sidebar-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-card);
}
.sidebar-preview {
  width: 100%;
  aspect-ratio: 16/9;
  background: var(--bg-secondary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 3rem;
  color: var(--accent);
}
.sidebar-price {
  padding: 20px;
  border-bottom: 1px solid var(--border);
}
.sidebar-price .price {
  font-size: 2rem;
  font-weight: 900;
  background: var(--gradient-accent);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.sidebar-body { padding: 20px; }
.course-includes li {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 8px 0;
  font-size: 0.88rem;
  color: var(--text-secondary);
  border-bottom: 1px solid var(--border);
}
.course-includes li:last-child { border-bottom: none; }
.course-includes li i { color: var(--accent-light); width: 16px; }

/* ============================================================
   SEARCH & FILTER
   ============================================================ */
.search-bar {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  padding: 32px 5%;
  background: var(--bg-secondary);
  border-bottom: 1px solid var(--border);
  align-items: center;
}
.search-bar .search-input {
  flex: 1;
  min-width: 240px;
  position: relative;
}
.search-bar .search-input i {
  position: absolute;
  left: 16px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-muted);
  font-size: 0.95rem;
}
.search-bar .search-input input {
  width: 100%;
  padding: 12px 18px 12px 46px;
  background: rgba(255, 255, 255, 0.02);
  border: 1.5px solid var(--border);
  border-radius: var(--radius);
  color: var(--text-primary);
  font-family: 'Inter', sans-serif;
  font-size: 0.95rem;
  outline: none;
  transition: all var(--transition);
}
.search-bar .search-input input:focus {
  border-color: var(--accent);
  background: rgba(139, 92, 246, 0.03);
  box-shadow: 0 0 0 4px rgba(139, 92, 246, 0.15);
}

/* ============================================================
   FOOTER
   ============================================================ */
.footer {
  background: var(--bg-secondary);
  border-top: 1px solid var(--border);
  padding: 80px 5% 40px;
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 48px;
  margin-bottom: 48px;
}
.footer-brand h3 {
  font-family: 'Plus Jakarta Sans', sans-serif;
  font-size: 1.4rem;
  font-weight: 800;
  margin-bottom: 16px;
  letter-spacing: -0.03em;
}
.footer-brand p { color: var(--text-secondary); font-size: 0.9rem; line-height: 1.75; }
.footer-col h4 {
  font-family: 'Plus Jakarta Sans', sans-serif;
  font-size: 0.88rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-primary);
  margin-bottom: 20px;
}
.footer-col ul li { margin-bottom: 12px; }
.footer-col ul li a {
  color: var(--text-secondary);
  font-size: 0.88rem;
  transition: color var(--transition);
}
.footer-col ul li a:hover { color: var(--accent-light); }
.footer-bottom {
  padding-top: 32px;
  border-top: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
  font-size: 0.85rem;
  color: var(--text-muted);
}
.social-links {
  display: flex;
  gap: 12px;
}
.social-links a {
  width: 40px; height: 40px;
  background: var(--bg-glass);
  border: 1px solid var(--border);
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  color: var(--text-secondary);
  font-size: 0.95rem;
  transition: all var(--transition);
}
.social-links a:hover {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
  transform: translateY(-3px);
  box-shadow: var(--shadow-accent);
}

/* ============================================================
   TESTIMONIALS
   ============================================================ */
.testimonials-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 28px;
}
.testimonial-card {
  background: var(--bg-card);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 32px;
  transition: all var(--transition);
  box-shadow: var(--shadow-card);
}
.testimonial-card:hover {
  border-color: var(--border-accent);
  transform: translateY(-6px);
  box-shadow: var(--shadow-glow);
}
.testimonial-card .quote { font-family: 'Plus Jakarta Sans', sans-serif; font-size: 2.2rem; color: var(--accent-light); line-height: 1; margin-bottom: 12px; font-weight: 800; }
.testimonial-card p { font-size: 0.92rem; color: var(--text-secondary); font-style: italic; margin-bottom: 24px; line-height: 1.75; }
.testimonial-author { display: flex; align-items: center; gap: 14px; }
.testimonial-author .avatar {
  width: 44px; height: 44px;
  border-radius: 50%;
  background: var(--gradient-accent);
  display: flex; align-items: center; justify-content: center;
  font-weight: 700; font-size: 1rem; color: #fff;
  flex-shrink: 0;
  box-shadow: var(--shadow-accent);
}
.testimonial-author .name { font-family: 'Plus Jakarta Sans', sans-serif; font-weight: 700; font-size: 0.95rem; color: #fff; }
.testimonial-author .role { font-size: 0.78rem; color: var(--text-muted); }

/* ============================================================
   PROGRESS BAR
   ============================================================ */
.progress-bar {
  height: 8px;
  background: var(--border);
  border-radius: 99px;
  overflow: hidden;
}
.progress-fill {
  height: 100%;
  background: var(--gradient-accent);
  border-radius: 99px;
  transition: width 0.6s cubic-bezier(0.16, 1, 0.3, 1);
  box-shadow: 0 0 8px rgba(139, 92, 246, 0.5);
}

/* ============================================================
   PAGINATION
   ============================================================ */
.pagination {
  display: flex;
  gap: 8px;
  justify-content: center;
  margin-top: 48px;
  flex-wrap: wrap;
}
.pagination a,
.pagination span {
  width: 40px; height: 40px;
  border-radius: var(--radius);
  display: flex; align-items: center; justify-content: center;
  font-size: 0.9rem;
  font-weight: 600;
  background: var(--bg-glass);
  border: 1px solid var(--border);
  color: var(--text-secondary);
  transition: all var(--transition);
}
.pagination a:hover  { border-color: var(--accent); color: var(--accent-light); }
.pagination .current { background: var(--accent); border-color: var(--accent); color: #fff; }

/* ============================================================
   UTILITY CLASSES
   ============================================================ */
.container { max-width: 1280px; margin: 0 auto; padding: 0 5%; }
.text-center { text-align: center; }
.text-muted  { color: var(--text-muted); }
.text-accent { color: var(--accent-light); }
.text-success{ color: var(--success); }
.text-danger { color: var(--danger); }
.mt-1 { margin-top: 8px; }
.mt-2 { margin-top: 16px; }
.mt-3 { margin-top: 24px; }
.mb-1 { margin-bottom: 8px; }
.mb-2 { margin-bottom: 16px; }
.mb-3 { margin-bottom: 24px; }
.gap-1 { gap: 8px; }
.flex { display: flex; }
.flex-center { display: flex; align-items: center; justify-content: center; }
.flex-between { display: flex; align-items: center; justify-content: space-between; }
.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; }

/* ============================================================
   ANIMATIONS
   ============================================================ */
.reveal {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.8s cubic-bezier(0.16, 1, 0.3, 1), transform 0.8s cubic-bezier(0.16, 1, 0.3, 1);
  will-change: transform, opacity;
}
.reveal.fade-up {
  opacity: 1;
  transform: translateY(0);
}

/* Staggered load delays for children of grids */
.reveal.fade-up.categories-grid > a:nth-child(1) { transition-delay: 0.05s; }
.reveal.fade-up.categories-grid > a:nth-child(2) { transition-delay: 0.1s; }
.reveal.fade-up.categories-grid > a:nth-child(3) { transition-delay: 0.15s; }
.reveal.fade-up.categories-grid > a:nth-child(4) { transition-delay: 0.2s; }
.reveal.fade-up.categories-grid > a:nth-child(5) { transition-delay: 0.25s; }
.reveal.fade-up.categories-grid > a:nth-child(6) { transition-delay: 0.3s; }
.reveal.fade-up.categories-grid > a:nth-child(7) { transition-delay: 0.35s; }
.reveal.fade-up.categories-grid > a:nth-child(8) { transition-delay: 0.4s; }

.reveal.fade-up.courses-grid > a:nth-child(1) { transition-delay: 0.05s; }
.reveal.fade-up.courses-grid > a:nth-child(2) { transition-delay: 0.1s; }
.reveal.fade-up.courses-grid > a:nth-child(3) { transition-delay: 0.15s; }
.reveal.fade-up.courses-grid > a:nth-child(4) { transition-delay: 0.2s; }
.reveal.fade-up.courses-grid > a:nth-child(5) { transition-delay: 0.25s; }
.reveal.fade-up.courses-grid > a:nth-child(6) { transition-delay: 0.3s; }

@keyframes fadeUp {
  from { opacity: 0; transform: translateY(24px); }
  to   { opacity: 1; transform: translateY(0); }
}
@keyframes fadeDown {
  from { opacity: 0; transform: translateY(-16px); }
  to   { opacity: 1; transform: translateY(0); }
}
@keyframes fadeIn {
  from { opacity: 0; }
  to   { opacity: 1; }
}
@keyframes slideDown {
  from { opacity: 0; transform: translateY(-10px); }
  to   { opacity: 1; transform: translateY(0); }
}
@keyframes pulse {
  0%, 100% { transform: scale(1); }
  50% { transform: scale(1.05); }
}
@keyframes shimmer {
  0%   { background-position: -200% 0; }
  100% { background-position: 200% 0; }
}

.fade-in { animation: fadeIn 0.5s ease; }
.fade-up { animation: fadeUp 0.5s ease; }

/* Floating cards in hero */
.float-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 18px;
  box-shadow: var(--shadow-card);
  animation: floatY 6s ease-in-out infinite;
  transition: transform var(--transition), border-color var(--transition), box-shadow var(--transition);
}
.float-card:nth-child(2) { animation: floatY2 7s ease-in-out infinite; animation-delay: 0.5s; }
.float-card:nth-child(3) { animation: floatY 5s ease-in-out infinite; animation-delay: 1s; }
.float-card:nth-child(4) { animation: floatY2 8s ease-in-out infinite; animation-delay: 1.5s; }

.float-card:hover {
  transform: translateY(-5px) scale(1.05) !important;
  box-shadow: var(--shadow-glow);
  border-color: var(--border-accent);
}

@keyframes floatY {
  0%, 100% { transform: translateY(0px); }
  50%       { transform: translateY(-10px); }
}
@keyframes floatY2 {
  0%, 100% { transform: translateY(0px); }
  50%       { transform: translateY(-15px); }
}

/* Loading skeleton */
.skeleton {
  background: linear-gradient(90deg, var(--bg-card) 25%, var(--bg-secondary) 50%, var(--bg-card) 75%);
  background-size: 200% 100%;
  animation: shimmer 1.5s infinite;
  border-radius: var(--radius);
}

/* ============================================================
   RESPONSIVE
   ============================================================ */
@media (max-width: 1024px) {
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .course-detail-grid { grid-template-columns: 1fr; }
  .hero-visual { display: none; }
}

@media (max-width: 768px) {
  .navbar-nav, .navbar-actions { display: none; }
  .hamburger { display: flex; }
  .hero { padding: 60px 5%; text-align: center; }
  .hero-actions { justify-content: center; width: 100%; }
  .hero-stats { justify-content: center; flex-wrap: wrap; gap: 20px; }
  .footer-grid { grid-template-columns: 1fr; }
  section { padding: 60px 5%; }
  .grid-2 { grid-template-columns: 1fr; }
  .search-bar { flex-direction: column; padding: 20px 5%; }
  .section-header h2 { font-size: 2rem; }
}

@media (max-width: 480px) {
  .auth-card { padding: 32px 24px; }
  .courses-grid { grid-template-columns: 1fr; }
  .categories-grid { grid-template-columns: 1fr; }
  .hero h1 { font-size: 2.2rem; }
  .hero-stats { gap: 15px; }
  .btn { width: 100%; justify-content: center; }
}

/* Mobile nav open */
.navbar.nav-open .navbar-nav,
.navbar.nav-open .navbar-actions {
  display: flex;
  flex-direction: column;
  position: fixed;
  top: 70px;
  left: 0;
  right: 0;
  background: var(--bg-secondary);
  border-bottom: 1px solid var(--border);
  padding: 20px 5%;
  gap: 8px;
  z-index: 999;
}
.navbar.nav-open .navbar-actions {
  top: auto;
  position: static;
  border-bottom: none;
  padding-top: 0;
  padding-bottom: 16px;
}