/* ============================================================
   Academia Digital de Topografía GEOSERVICIOS — Design System
   ============================================================ */

/* ---------- CSS Custom Properties ---------- */
:root {
  /* Core palette */
  --navy: #0f172a;
  --navy-light: #1e293b;
  --navy-lighter: #334155;
  --cyan: #06b6d4;
  --cyan-dark: #0891b2;
  --cyan-light: #22d3ee;
  --amber: #f59e0b;
  --amber-dark: #d97706;

  /* Semantic */
  --success: #10b981;
  --error: #ef4444;
  --warning: #f59e0b;
  --info: #3b82f6;

  /* Text */
  --text-primary: #f8fafc;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;

  /* Glass */
  --glass-bg: rgba(255, 255, 255, 0.05);
  --glass-border: rgba(255, 255, 255, 0.1);
  --glass-bg-hover: rgba(255, 255, 255, 0.08);

  /* Gradients */
  --gradient-cyan: linear-gradient(135deg, var(--cyan), var(--cyan-dark));
  --gradient-amber: linear-gradient(135deg, var(--amber), var(--amber-dark));
  --gradient-hero: linear-gradient(135deg, #0f172a 0%, #0c1220 40%, #0a1628 100%);
  --gradient-card: linear-gradient(145deg, rgba(30,41,59,.7), rgba(15,23,42,.9));

  /* Shadows */
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, .3);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, .4);
  --shadow-lg: 0 8px 30px rgba(0, 0, 0, .5);
  --shadow-cyan: 0 4px 20px rgba(6, 182, 212, .25);
  --shadow-amber: 0 4px 20px rgba(245, 158, 11, .25);

  /* Radius */
  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --radius-xl: 28px;
  --radius-full: 9999px;

  /* Spacing scale */
  --space-xs: .25rem;
  --space-sm: .5rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2rem;
  --space-2xl: 3rem;
  --space-3xl: 4rem;
  --space-4xl: 6rem;

  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-base: 250ms ease;
  --transition-slow: 400ms cubic-bezier(.4,0,.2,1);

  /* Z-index layers */
  --z-dropdown: 100;
  --z-navbar: 200;
  --z-modal-backdrop: 300;
  --z-modal: 400;
  --z-toast: 500;
}

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

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

body {
  font-family: 'Inter', system-ui, -apple-system, sans-serif;
  background: var(--navy);
  color: var(--text-primary);
  line-height: 1.7;
  overflow-x: hidden;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

h1, h2, h3, h4, h5, h6 {
  font-family: 'Outfit', sans-serif;
  font-weight: 700;
  line-height: 1.25;
  color: var(--text-primary);
  margin-bottom: .5em;
}
h1 { font-size: clamp(2rem, 5vw, 3.25rem); }
h2 { font-size: clamp(1.6rem, 4vw, 2.5rem); }
h3 { font-size: clamp(1.25rem, 3vw, 1.75rem); }
h4 { font-size: 1.25rem; }
h5 { font-size: 1.1rem; }

a { color: var(--cyan); text-decoration: none; transition: color var(--transition-fast); }
a:hover { color: var(--cyan-light); }

img { max-width: 100%; height: auto; display: block; }
ul, ol { list-style: none; }
button { cursor: pointer; font-family: inherit; }
input, textarea, select { font-family: inherit; font-size: inherit; }

::selection { background: var(--cyan); color: var(--navy); }

/* ---------- Layout ---------- */
.container {
  width: 100%;
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 var(--space-lg);
}
.container-sm { max-width: 800px; margin: 0 auto; padding: 0 var(--space-lg); }
.container-lg { max-width: 1400px; margin: 0 auto; padding: 0 var(--space-lg); }

.section { padding: var(--space-4xl) 0; }
.section-sm { padding: var(--space-2xl) 0; }

.grid { display: grid; gap: var(--space-xl); }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }

.flex { display: flex; }
.flex-center { display: flex; align-items: center; justify-content: center; }
.flex-between { display: flex; align-items: center; justify-content: space-between; }
.flex-col { flex-direction: column; }
.flex-wrap { flex-wrap: wrap; }
.gap-sm { gap: var(--space-sm); }
.gap-md { gap: var(--space-md); }
.gap-lg { gap: var(--space-lg); }
.gap-xl { gap: var(--space-xl); }

.text-center { text-align: center; }
.text-right { text-align: right; }
.text-cyan { color: var(--cyan); }
.text-amber { color: var(--amber); }
.text-muted { color: var(--text-muted); }
.text-secondary { color: var(--text-secondary); }

.mt-sm { margin-top: var(--space-sm); }
.mt-md { margin-top: var(--space-md); }
.mt-lg { margin-top: var(--space-lg); }
.mt-xl { margin-top: var(--space-xl); }
.mt-2xl { margin-top: var(--space-2xl); }
.mb-sm { margin-bottom: var(--space-sm); }
.mb-md { margin-bottom: var(--space-md); }
.mb-lg { margin-bottom: var(--space-lg); }
.mb-xl { margin-bottom: var(--space-xl); }
.mb-2xl { margin-bottom: var(--space-2xl); }

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: .5rem;
  padding: .75rem 1.75rem;
  font-weight: 600;
  font-size: .95rem;
  border-radius: var(--radius-md);
  border: none;
  transition: all var(--transition-base);
  text-decoration: none;
  white-space: nowrap;
  position: relative;
  overflow: hidden;
}
.btn i { font-size: .9em; }

.btn-primary {
  background: var(--gradient-cyan);
  color: #fff;
  box-shadow: var(--shadow-cyan);
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 25px rgba(6, 182, 212, .4);
  color: #fff;
}

.btn-secondary {
  background: var(--gradient-amber);
  color: var(--navy);
  box-shadow: var(--shadow-amber);
}
.btn-secondary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 25px rgba(245, 158, 11, .4);
  color: var(--navy);
}

.btn-outline {
  background: transparent;
  color: var(--cyan);
  border: 2px solid var(--cyan);
}
.btn-outline:hover {
  background: var(--cyan);
  color: var(--navy);
  transform: translateY(-2px);
}

.btn-outline-amber {
  background: transparent;
  color: var(--amber);
  border: 2px solid var(--amber);
}
.btn-outline-amber:hover {
  background: var(--amber);
  color: var(--navy);
}

.btn-ghost {
  background: var(--glass-bg);
  color: var(--text-primary);
  border: 1px solid var(--glass-border);
}
.btn-ghost:hover {
  background: var(--glass-bg-hover);
  color: var(--cyan);
}

.btn-sm { padding: .45rem 1rem; font-size: .85rem; border-radius: var(--radius-sm); }
.btn-lg { padding: 1rem 2.5rem; font-size: 1.1rem; border-radius: var(--radius-lg); }
.btn-block { width: 100%; }

.btn-icon {
  width: 44px; height: 44px; padding: 0;
  border-radius: var(--radius-full);
  font-size: 1.1rem;
}

.btn:disabled, .btn.disabled {
  opacity: .5; pointer-events: none; cursor: not-allowed;
}

/* ---------- Cards ---------- */
.card {
  background: var(--gradient-card);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  padding: var(--space-xl);
  transition: all var(--transition-slow);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
}
.card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: rgba(6, 182, 212, .2);
}

.card-flat { background: var(--navy-light); border: 1px solid var(--glass-border); border-radius: var(--radius-lg); padding: var(--space-xl); }

/* Course card */
.course-card {
  background: var(--gradient-card);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: all var(--transition-slow);
  display: flex;
  flex-direction: column;
}
.course-card:hover {
  transform: translateY(-6px) scale(1.01);
  box-shadow: 0 12px 40px rgba(6, 182, 212, .15);
  border-color: rgba(6, 182, 212, .3);
}
.course-card__image {
  position: relative;
  overflow: hidden;
  aspect-ratio: 16 / 9;
}
.course-card__image img {
  width: 100%; height: 100%;
  object-fit: cover;
  transition: transform var(--transition-slow);
}
.course-card:hover .course-card__image img {
  transform: scale(1.08);
}
.course-card__category {
  position: absolute;
  top: var(--space-md);
  left: var(--space-md);
  background: var(--cyan);
  color: var(--navy);
  font-size: .75rem;
  font-weight: 700;
  padding: .25rem .75rem;
  border-radius: var(--radius-full);
  text-transform: uppercase;
  letter-spacing: .05em;
}
.course-card__price {
  position: absolute;
  top: var(--space-md);
  right: var(--space-md);
  background: var(--amber);
  color: var(--navy);
  font-weight: 800;
  font-size: .9rem;
  padding: .3rem .8rem;
  border-radius: var(--radius-full);
}
.course-card__body {
  padding: var(--space-lg);
  flex: 1;
  display: flex;
  flex-direction: column;
}
.course-card__title {
  font-size: 1.15rem;
  font-weight: 700;
  margin-bottom: .5rem;
  line-height: 1.3;
}
.course-card__desc {
  color: var(--text-secondary);
  font-size: .9rem;
  line-height: 1.6;
  margin-bottom: var(--space-md);
  flex: 1;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.course-card__meta {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  padding-top: var(--space-md);
  border-top: 1px solid var(--glass-border);
  font-size: .85rem;
  color: var(--text-muted);
}
.course-card__meta span { display: flex; align-items: center; gap: .3rem; }
.course-card__meta i { color: var(--cyan); font-size: .8rem; }
.course-card__footer {
  padding: 0 var(--space-lg) var(--space-lg);
}

/* ---------- Badges ---------- */
.badge {
  display: inline-flex;
  align-items: center;
  gap: .3rem;
  padding: .2rem .65rem;
  font-size: .75rem;
  font-weight: 600;
  border-radius: var(--radius-full);
  text-transform: uppercase;
  letter-spacing: .03em;
}
.badge-cyan { background: rgba(6,182,212,.15); color: var(--cyan); }
.badge-amber { background: rgba(245,158,11,.15); color: var(--amber); }
.badge-success { background: rgba(16,185,129,.15); color: var(--success); }
.badge-error { background: rgba(239,68,68,.15); color: var(--error); }
.badge-info { background: rgba(59,130,246,.15); color: var(--info); }
.badge-muted { background: rgba(100,116,139,.15); color: var(--text-muted); }

/* ---------- Navbar ---------- */
.navbar {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: var(--z-navbar);
  padding: .75rem 0;
  transition: all var(--transition-base);
  background: transparent;
}
.navbar.scrolled {
  background: rgba(15, 23, 42, .92);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--glass-border);
  box-shadow: var(--shadow-md);
}
.navbar__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 var(--space-lg);
}
.navbar__logo {
  display: flex; align-items: center; gap: .6rem;
  font-family: 'Outfit', sans-serif;
  font-weight: 800;
  font-size: 1.2rem;
  color: var(--text-primary);
  text-decoration: none;
}
.navbar__logo img { height: 36px; width: auto; }
.navbar__logo span { color: var(--cyan); }

.navbar__links {
  display: flex;
  align-items: center;
  gap: .25rem;
}
.navbar__links a {
  color: var(--text-secondary);
  font-weight: 500;
  font-size: .92rem;
  padding: .5rem .9rem;
  border-radius: var(--radius-sm);
  transition: all var(--transition-fast);
  text-decoration: none;
}
.navbar__links a:hover,
.navbar__links a.active {
  color: var(--text-primary);
  background: var(--glass-bg);
}
.navbar__links a.active { color: var(--cyan); }

.navbar__actions {
  display: flex;
  align-items: center;
  gap: .75rem;
}
.navbar__user {
  position: relative;
  display: flex; align-items: center; gap: .5rem;
  cursor: pointer;
  padding: .4rem .8rem;
  border-radius: var(--radius-full);
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  color: var(--text-primary);
  font-weight: 500;
  font-size: .9rem;
}
.navbar__user-avatar {
  width: 30px; height: 30px;
  border-radius: var(--radius-full);
  background: var(--gradient-cyan);
  display: flex; align-items: center; justify-content: center;
  font-size: .8rem; font-weight: 700; color: #fff;
}
.navbar__dropdown {
  position: absolute;
  top: calc(100% + .5rem);
  right: 0;
  background: var(--navy-light);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-md);
  min-width: 200px;
  padding: .5rem;
  box-shadow: var(--shadow-lg);
  opacity: 0;
  visibility: hidden;
  transform: translateY(-8px);
  transition: all var(--transition-fast);
  z-index: var(--z-dropdown);
}
.navbar__user:hover .navbar__dropdown,
.navbar__dropdown.show {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}
.navbar__dropdown a {
  display: flex; align-items: center; gap: .6rem;
  padding: .6rem .8rem;
  color: var(--text-secondary);
  font-size: .9rem;
  border-radius: var(--radius-sm);
  transition: all var(--transition-fast);
}
.navbar__dropdown a:hover {
  color: var(--text-primary);
  background: var(--glass-bg);
}
.navbar__dropdown hr {
  border: none;
  border-top: 1px solid var(--glass-border);
  margin: .3rem 0;
}

/* Mobile hamburger */
.navbar__toggle {
  display: none;
  background: none; border: none;
  color: var(--text-primary);
  font-size: 1.5rem;
  padding: .25rem;
  cursor: pointer;
}

/* Mobile menu */
.navbar__mobile {
  display: none;
  position: fixed;
  top: 0; left: 0; right: 0; bottom: 0;
  background: rgba(15, 23, 42, .98);
  z-index: calc(var(--z-navbar) - 1);
  flex-direction: column;
  padding: 5rem var(--space-xl) var(--space-xl);
  gap: .25rem;
  overflow-y: auto;
}
.navbar__mobile.open { display: flex; }
.navbar__mobile a {
  color: var(--text-secondary);
  font-size: 1.15rem;
  font-weight: 500;
  padding: .8rem var(--space-md);
  border-radius: var(--radius-sm);
  transition: all var(--transition-fast);
}
.navbar__mobile a:hover,
.navbar__mobile a.active {
  color: var(--text-primary);
  background: var(--glass-bg);
}

/* ---------- Hero Section ---------- */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  background: var(--gradient-hero);
  overflow: hidden;
}
.hero::before {
  content: '';
  position: absolute;
  top: -50%; left: -50%;
  width: 200%; height: 200%;
  background: radial-gradient(ellipse at 30% 50%, rgba(6,182,212,.08) 0%, transparent 50%),
              radial-gradient(ellipse at 70% 50%, rgba(245,158,11,.05) 0%, transparent 50%);
  animation: heroFloat 20s ease-in-out infinite;
}
.hero__grid-bg {
  position: absolute; inset: 0;
  background-image:
    linear-gradient(rgba(6,182,212,.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(6,182,212,.03) 1px, transparent 1px);
  background-size: 60px 60px;
  mask-image: radial-gradient(ellipse at center, black 30%, transparent 70%);
  -webkit-mask-image: radial-gradient(ellipse at center, black 30%, transparent 70%);
}
.hero__content {
  position: relative;
  z-index: 1;
  max-width: 720px;
}
.hero__tag {
  display: inline-flex;
  align-items: center;
  gap: .5rem;
  padding: .4rem 1rem;
  background: rgba(6,182,212,.1);
  border: 1px solid rgba(6,182,212,.2);
  border-radius: var(--radius-full);
  color: var(--cyan);
  font-size: .85rem;
  font-weight: 600;
  margin-bottom: var(--space-lg);
}
.hero__title {
  font-size: clamp(2.2rem, 5.5vw, 3.75rem);
  line-height: 1.1;
  margin-bottom: var(--space-lg);
}
.hero__title .highlight {
  background: var(--gradient-cyan);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.hero__subtitle {
  font-size: clamp(1rem, 2vw, 1.2rem);
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: var(--space-2xl);
  max-width: 560px;
}
.hero__actions {
  display: flex;
  gap: var(--space-md);
  flex-wrap: wrap;
}
.hero__image {
  position: relative; z-index: 1;
}
.hero__image img {
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-lg);
}

/* Hero particle dots */
.hero__dots {
  position: absolute; inset: 0;
  overflow: hidden;
}
.hero__dots span {
  position: absolute;
  width: 3px; height: 3px;
  background: var(--cyan);
  border-radius: 50%;
  opacity: .3;
  animation: float 6s ease-in-out infinite;
}

/* ---------- Stats Bar ---------- */
.stats-bar {
  background: var(--navy-light);
  border-top: 1px solid var(--glass-border);
  border-bottom: 1px solid var(--glass-border);
  padding: var(--space-2xl) 0;
}
.stats-bar__grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-xl);
  text-align: center;
}
.stats-bar__item h3 {
  font-size: clamp(1.8rem, 3vw, 2.5rem);
  color: var(--cyan);
  margin-bottom: .25rem;
}
.stats-bar__item p {
  color: var(--text-secondary);
  font-size: .95rem;
}

/* ---------- Section Headers ---------- */
.section-header {
  text-align: center;
  max-width: 640px;
  margin: 0 auto var(--space-3xl);
}
.section-header__tag {
  display: inline-block;
  color: var(--cyan);
  font-weight: 600;
  font-size: .85rem;
  text-transform: uppercase;
  letter-spacing: .1em;
  margin-bottom: var(--space-sm);
}
.section-header h2 { margin-bottom: var(--space-md); }
.section-header p { color: var(--text-secondary); font-size: 1.05rem; }

/* ---------- Benefits / Feature Cards ---------- */
.benefit-card {
  text-align: center;
  padding: var(--space-2xl) var(--space-xl);
}
.benefit-card__icon {
  width: 70px; height: 70px;
  border-radius: var(--radius-lg);
  display: flex; align-items: center; justify-content: center;
  margin: 0 auto var(--space-lg);
  font-size: 1.5rem;
  background: rgba(6,182,212,.1);
  color: var(--cyan);
  border: 1px solid rgba(6,182,212,.15);
  transition: all var(--transition-base);
}
.benefit-card:hover .benefit-card__icon {
  background: var(--cyan);
  color: var(--navy);
  transform: scale(1.1);
}
.benefit-card__title { font-size: 1.1rem; margin-bottom: .5rem; }
.benefit-card__text { color: var(--text-secondary); font-size: .9rem; }

/* ---------- Timeline ---------- */
.timeline { position: relative; padding: var(--space-xl) 0; }
.timeline::before {
  content: '';
  position: absolute;
  top: 0; bottom: 0;
  left: 50%;
  width: 2px;
  background: var(--glass-border);
  transform: translateX(-50%);
}
.timeline__item {
  position: relative;
  display: flex;
  align-items: flex-start;
  margin-bottom: var(--space-3xl);
}
.timeline__item:nth-child(odd) { flex-direction: row; }
.timeline__item:nth-child(even) { flex-direction: row-reverse; }
.timeline__item:last-child { margin-bottom: 0; }

.timeline__dot {
  position: absolute;
  left: 50%;
  transform: translateX(-50%);
  width: 48px; height: 48px;
  background: var(--gradient-cyan);
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-weight: 800;
  font-size: 1rem;
  color: #fff;
  z-index: 2;
  box-shadow: var(--shadow-cyan);
}
.timeline__content {
  width: calc(50% - 3rem);
  background: var(--gradient-card);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  padding: var(--space-xl);
}
.timeline__content h3 { font-size: 1.15rem; margin-bottom: .5rem; }
.timeline__content p { color: var(--text-secondary); font-size: .9rem; }
.timeline__icon { font-size: 1.3rem; color: var(--cyan); margin-bottom: var(--space-sm); display: block; }

/* ---------- Pricing Cards ---------- */
.pricing-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-md);
  margin-bottom: var(--space-3xl);
}
.pricing-toggle__label { color: var(--text-secondary); font-weight: 500; }
.pricing-toggle__label.active { color: var(--text-primary); }
.pricing-toggle__switch {
  width: 56px; height: 28px;
  background: var(--navy-lighter);
  border-radius: var(--radius-full);
  position: relative;
  cursor: pointer;
  border: 1px solid var(--glass-border);
  transition: background var(--transition-fast);
}
.pricing-toggle__switch::after {
  content: '';
  position: absolute;
  top: 3px; left: 3px;
  width: 20px; height: 20px;
  background: var(--cyan);
  border-radius: 50%;
  transition: transform var(--transition-fast);
}
.pricing-toggle__switch.annual::after { transform: translateX(28px); }
.pricing-toggle__save { background: rgba(16,185,129,.1); color: var(--success); font-size: .8rem; font-weight: 600; padding: .2rem .6rem; border-radius: var(--radius-full); }

.pricing-card {
  background: var(--gradient-card);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-xl);
  padding: var(--space-2xl);
  text-align: center;
  position: relative;
  transition: all var(--transition-slow);
}
.pricing-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}
.pricing-card--featured {
  border-color: var(--cyan);
  box-shadow: var(--shadow-cyan);
  transform: scale(1.05);
}
.pricing-card--featured:hover {
  transform: scale(1.05) translateY(-4px);
}
.pricing-card__badge {
  position: absolute;
  top: -14px; left: 50%;
  transform: translateX(-50%);
  background: var(--gradient-cyan);
  color: #fff;
  font-size: .78rem;
  font-weight: 700;
  padding: .3rem 1.2rem;
  border-radius: var(--radius-full);
  text-transform: uppercase;
  letter-spacing: .05em;
}
.pricing-card__name {
  font-size: 1.3rem;
  margin-bottom: var(--space-sm);
}
.pricing-card__price {
  font-size: 3rem;
  font-weight: 800;
  color: var(--text-primary);
  margin-bottom: var(--space-xs);
  font-family: 'Outfit', sans-serif;
}
.pricing-card__price sup { font-size: 1.2rem; vertical-align: super; margin-right: .1rem; }
.pricing-card__price sub { font-size: .9rem; font-weight: 400; color: var(--text-muted); }
.pricing-card__period { color: var(--text-muted); font-size: .9rem; margin-bottom: var(--space-xl); }
.pricing-card__features {
  text-align: left;
  margin-bottom: var(--space-xl);
}
.pricing-card__features li {
  display: flex;
  align-items: flex-start;
  gap: .6rem;
  padding: .5rem 0;
  font-size: .92rem;
  color: var(--text-secondary);
  border-bottom: 1px solid rgba(255,255,255,.04);
}
.pricing-card__features li:last-child { border-bottom: none; }
.pricing-card__features li i { color: var(--cyan); margin-top: .2rem; font-size: .85rem; }
.pricing-card__features li.disabled { opacity: .4; }
.pricing-card__features li.disabled i { color: var(--text-muted); }

/* ---------- Testimonials ---------- */
.testimonial-card {
  background: var(--gradient-card);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  padding: var(--space-xl);
}
.testimonial-card__stars { color: var(--amber); margin-bottom: var(--space-md); font-size: .9rem; }
.testimonial-card__text {
  color: var(--text-secondary);
  font-size: .95rem;
  line-height: 1.7;
  margin-bottom: var(--space-lg);
  font-style: italic;
}
.testimonial-card__author {
  display: flex;
  align-items: center;
  gap: var(--space-md);
}
.testimonial-card__avatar {
  width: 48px; height: 48px;
  border-radius: 50%;
  background: var(--gradient-cyan);
  display: flex; align-items: center; justify-content: center;
  font-weight: 700; color: #fff; font-size: 1.1rem;
}
.testimonial-card__name { font-weight: 600; font-size: .95rem; }
.testimonial-card__role { color: var(--text-muted); font-size: .85rem; }

/* ---------- CTA Banner ---------- */
.cta-banner {
  background: linear-gradient(135deg, rgba(6,182,212,.15), rgba(245,158,11,.1));
  border: 1px solid rgba(6,182,212,.2);
  border-radius: var(--radius-xl);
  padding: var(--space-3xl) var(--space-2xl);
  text-align: center;
}
.cta-banner h2 { margin-bottom: var(--space-md); }
.cta-banner p { color: var(--text-secondary); max-width: 500px; margin: 0 auto var(--space-xl); }

/* ---------- Forms ---------- */
.form-group { margin-bottom: var(--space-lg); }
.form-group label {
  display: block;
  font-weight: 500;
  font-size: .9rem;
  color: var(--text-secondary);
  margin-bottom: .4rem;
}
.form-control {
  width: 100%;
  padding: .75rem 1rem;
  background: var(--navy);
  border: 1px solid var(--navy-lighter);
  border-radius: var(--radius-md);
  color: var(--text-primary);
  font-size: .95rem;
  transition: all var(--transition-fast);
  outline: none;
}
.form-control:focus {
  border-color: var(--cyan);
  box-shadow: 0 0 0 3px rgba(6,182,212,.15);
}
.form-control::placeholder { color: var(--text-muted); }

textarea.form-control { min-height: 120px; resize: vertical; }

select.form-control {
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' fill='%2394a3b8' viewBox='0 0 16 16'%3E%3Cpath d='M8 11L3 6h10z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 1rem center;
  padding-right: 2.5rem;
}

.form-check {
  display: flex;
  align-items: center;
  gap: .5rem;
  cursor: pointer;
}
.form-check input[type="checkbox"],
.form-check input[type="radio"] {
  width: 18px; height: 18px;
  accent-color: var(--cyan);
  cursor: pointer;
}

.form-error { color: var(--error); font-size: .85rem; margin-top: .3rem; }
.form-help { color: var(--text-muted); font-size: .85rem; margin-top: .3rem; }

/* Auth pages split layout */
.auth-page {
  min-height: 100vh;
  display: grid;
  grid-template-columns: 1fr 1fr;
}
.auth-page__left {
  background: linear-gradient(135deg, var(--navy), var(--navy-light));
  display: flex; align-items: center; justify-content: center;
  padding: var(--space-3xl);
  position: relative;
  overflow: hidden;
}
.auth-page__left::before {
  content: '';
  position: absolute; inset: 0;
  background: radial-gradient(ellipse at center, rgba(6,182,212,.1), transparent 70%);
}
.auth-page__graphic {
  position: relative; z-index: 1;
  text-align: center;
  max-width: 400px;
}
.auth-page__graphic h2 { margin-bottom: var(--space-md); }
.auth-page__graphic p { color: var(--text-secondary); }
.auth-page__graphic i { font-size: 5rem; color: var(--cyan); opacity: .3; margin-bottom: var(--space-xl); display: block; }

.auth-page__right {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-3xl);
  background: var(--navy-light);
}
.auth-form {
  width: 100%;
  max-width: 420px;
}
.auth-form__title { font-size: 1.8rem; margin-bottom: .25rem; }
.auth-form__subtitle { color: var(--text-secondary); margin-bottom: var(--space-2xl); }

/* ---------- Tables ---------- */
.table-responsive { overflow-x: auto; border-radius: var(--radius-md); }
.table {
  width: 100%;
  border-collapse: collapse;
  font-size: .9rem;
}
.table thead { background: var(--navy); }
.table th {
  padding: .85rem 1rem;
  text-align: left;
  font-weight: 600;
  font-size: .8rem;
  text-transform: uppercase;
  letter-spacing: .05em;
  color: var(--text-muted);
  border-bottom: 1px solid var(--glass-border);
}
.table td {
  padding: .85rem 1rem;
  color: var(--text-secondary);
  border-bottom: 1px solid rgba(255,255,255,.03);
}
.table tbody tr { transition: background var(--transition-fast); }
.table tbody tr:hover { background: var(--glass-bg); }
.table tbody tr:nth-child(even) { background: rgba(255,255,255,.02); }
.table tbody tr:nth-child(even):hover { background: var(--glass-bg); }

/* ---------- Progress Bar ---------- */
.progress-bar {
  width: 100%;
  height: 8px;
  background: var(--navy);
  border-radius: var(--radius-full);
  overflow: hidden;
}
.progress-bar__fill {
  height: 100%;
  background: var(--gradient-cyan);
  border-radius: var(--radius-full);
  transition: width .6s cubic-bezier(.4,0,.2,1);
  position: relative;
}
.progress-bar__fill::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,.2), transparent);
  animation: shimmer 2s infinite;
}
.progress-bar--lg { height: 12px; }

.progress-info {
  display: flex;
  justify-content: space-between;
  font-size: .85rem;
  color: var(--text-muted);
  margin-bottom: .4rem;
}

/* ---------- Alerts / Messages ---------- */
.alert {
  display: flex;
  align-items: flex-start;
  gap: var(--space-md);
  padding: var(--space-md) var(--space-lg);
  border-radius: var(--radius-md);
  font-size: .92rem;
  margin-bottom: var(--space-md);
  border: 1px solid;
  animation: slideDown .3s ease-out;
}
.alert i { margin-top: .15rem; }
.alert-success { background: rgba(16,185,129,.1); border-color: rgba(16,185,129,.2); color: var(--success); }
.alert-error { background: rgba(239,68,68,.1); border-color: rgba(239,68,68,.2); color: var(--error); }
.alert-warning { background: rgba(245,158,11,.1); border-color: rgba(245,158,11,.2); color: var(--warning); }
.alert-info { background: rgba(59,130,246,.1); border-color: rgba(59,130,246,.2); color: var(--info); }
.alert__close {
  margin-left: auto;
  background: none; border: none;
  color: inherit; opacity: .6;
  font-size: 1.1rem;
  cursor: pointer;
  transition: opacity var(--transition-fast);
}
.alert__close:hover { opacity: 1; }

.messages-container {
  position: fixed;
  top: 5rem; right: var(--space-lg);
  z-index: var(--z-toast);
  display: flex;
  flex-direction: column;
  gap: .5rem;
  max-width: 420px;
  width: 100%;
}

/* ---------- Modal ---------- */
.modal-backdrop {
  position: fixed; inset: 0;
  background: rgba(0, 0, 0, .6);
  backdrop-filter: blur(4px);
  z-index: var(--z-modal-backdrop);
  display: none;
  align-items: center;
  justify-content: center;
}
.modal-backdrop.show { display: flex; }
.modal {
  background: var(--navy-light);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-xl);
  width: 90%;
  max-width: 520px;
  max-height: 90vh;
  overflow-y: auto;
  padding: var(--space-2xl);
  animation: scaleIn .25s ease-out;
}
.modal__header { display: flex; justify-content: space-between; align-items: center; margin-bottom: var(--space-xl); }
.modal__close { background: none; border: none; color: var(--text-muted); font-size: 1.3rem; cursor: pointer; }

/* ---------- Tabs ---------- */
.tabs {
  display: flex;
  gap: .25rem;
  border-bottom: 1px solid var(--glass-border);
  margin-bottom: var(--space-xl);
  overflow-x: auto;
}
.tab-btn {
  padding: .75rem 1.25rem;
  background: none;
  border: none;
  color: var(--text-muted);
  font-weight: 500;
  font-size: .92rem;
  cursor: pointer;
  position: relative;
  white-space: nowrap;
  transition: color var(--transition-fast);
}
.tab-btn:hover { color: var(--text-secondary); }
.tab-btn.active {
  color: var(--cyan);
}
.tab-btn.active::after {
  content: '';
  position: absolute;
  bottom: -1px; left: 0; right: 0;
  height: 2px;
  background: var(--cyan);
  border-radius: 2px 2px 0 0;
}
.tab-content { display: none; }
.tab-content.active { display: block; animation: fadeIn .3s ease; }

/* ---------- Breadcrumb ---------- */
.breadcrumb {
  display: flex;
  align-items: center;
  gap: .5rem;
  font-size: .88rem;
  color: var(--text-muted);
  margin-bottom: var(--space-xl);
  flex-wrap: wrap;
}
.breadcrumb a { color: var(--text-muted); }
.breadcrumb a:hover { color: var(--cyan); }
.breadcrumb__sep { color: var(--navy-lighter); }
.breadcrumb__current { color: var(--text-secondary); }

/* ---------- Dashboard ---------- */
.dashboard {
  display: grid;
  grid-template-columns: 260px 1fr;
  min-height: 100vh;
  padding-top: 64px;
}

.dashboard__sidebar {
  background: var(--navy-light);
  border-right: 1px solid var(--glass-border);
  padding: var(--space-xl) 0;
  position: sticky;
  top: 64px;
  height: calc(100vh - 64px);
  overflow-y: auto;
}
.dashboard__sidebar-title {
  font-size: .75rem;
  text-transform: uppercase;
  letter-spacing: .1em;
  color: var(--text-muted);
  padding: var(--space-md) var(--space-lg);
  margin-top: var(--space-md);
}
.dashboard__sidebar-title:first-child { margin-top: 0; }
.sidebar-link {
  display: flex;
  align-items: center;
  gap: .75rem;
  padding: .7rem var(--space-lg);
  color: var(--text-secondary);
  font-weight: 500;
  font-size: .9rem;
  transition: all var(--transition-fast);
  border-left: 3px solid transparent;
}
.sidebar-link:hover {
  color: var(--text-primary);
  background: var(--glass-bg);
}
.sidebar-link.active {
  color: var(--cyan);
  background: rgba(6,182,212,.05);
  border-left-color: var(--cyan);
}
.sidebar-link i { width: 20px; text-align: center; font-size: .95rem; }

.dashboard__main {
  padding: var(--space-2xl);
  overflow-y: auto;
}

.stat-card {
  background: var(--gradient-card);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  padding: var(--space-xl);
  display: flex;
  align-items: center;
  gap: var(--space-lg);
}
.stat-card__icon {
  width: 56px; height: 56px;
  border-radius: var(--radius-md);
  display: flex; align-items: center; justify-content: center;
  font-size: 1.3rem;
  flex-shrink: 0;
}
.stat-card__icon--cyan { background: rgba(6,182,212,.12); color: var(--cyan); }
.stat-card__icon--amber { background: rgba(245,158,11,.12); color: var(--amber); }
.stat-card__icon--success { background: rgba(16,185,129,.12); color: var(--success); }
.stat-card__icon--info { background: rgba(59,130,246,.12); color: var(--info); }
.stat-card__value { font-size: 1.8rem; font-weight: 800; font-family: 'Outfit', sans-serif; line-height: 1; }
.stat-card__label { color: var(--text-muted); font-size: .85rem; margin-top: .2rem; }

/* ---------- Video Player Page ---------- */
.player-layout {
  display: grid;
  grid-template-columns: 1fr 340px;
  gap: 0;
  min-height: calc(100vh - 64px);
  margin-top: 64px;
}
.player-layout__main {
  padding: var(--space-xl) var(--space-2xl);
}
.player-layout__sidebar {
  background: var(--navy-light);
  border-left: 1px solid var(--glass-border);
  overflow-y: auto;
  max-height: calc(100vh - 64px);
  position: sticky;
  top: 64px;
}
.video-container {
  position: relative;
  width: 100%;
  padding-bottom: 56.25%;
  background: #000;
  border-radius: var(--radius-lg);
  overflow: hidden;
  margin-bottom: var(--space-xl);
}
.video-container iframe {
  position: absolute;
  top: 0; left: 0;
  width: 100%; height: 100%;
  border: none;
}

.lesson-sidebar__header {
  padding: var(--space-lg);
  border-bottom: 1px solid var(--glass-border);
}
.lesson-sidebar__header h3 { font-size: 1rem; margin-bottom: .25rem; }
.lesson-sidebar__progress { font-size: .85rem; color: var(--text-muted); }

.lesson-item {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  padding: var(--space-md) var(--space-lg);
  border-bottom: 1px solid rgba(255,255,255,.03);
  color: var(--text-secondary);
  font-size: .88rem;
  transition: all var(--transition-fast);
  text-decoration: none;
}
.lesson-item:hover { background: var(--glass-bg); color: var(--text-primary); }
.lesson-item.active { background: rgba(6,182,212,.08); color: var(--cyan); border-left: 3px solid var(--cyan); }
.lesson-item.completed .lesson-item__status { color: var(--success); }
.lesson-item.locked { opacity: .5; pointer-events: none; }
.lesson-item__number {
  width: 28px; height: 28px;
  border-radius: 50%;
  background: var(--navy);
  display: flex; align-items: center; justify-content: center;
  font-size: .75rem;
  font-weight: 600;
  flex-shrink: 0;
}
.lesson-item__title { flex: 1; }
.lesson-item__duration { color: var(--text-muted); font-size: .8rem; }
.lesson-item__status { font-size: .85rem; }

/* ---------- Certificate Verify Page ---------- */
.certificate-verify {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-3xl) var(--space-lg);
  background: var(--gradient-hero);
}
.certificate-card {
  background: var(--navy-light);
  border: 2px solid var(--glass-border);
  border-radius: var(--radius-xl);
  padding: var(--space-3xl);
  max-width: 560px;
  width: 100%;
  text-align: center;
}
.certificate-card.valid { border-color: var(--success); }
.certificate-card.invalid { border-color: var(--error); }
.certificate-card__badge {
  width: 80px; height: 80px;
  border-radius: 50%;
  margin: 0 auto var(--space-xl);
  display: flex; align-items: center; justify-content: center;
  font-size: 2rem;
}
.certificate-card__badge--valid { background: rgba(16,185,129,.12); color: var(--success); }
.certificate-card__badge--invalid { background: rgba(239,68,68,.12); color: var(--error); }
.certificate-card__label { font-size: .85rem; color: var(--text-muted); margin-bottom: .15rem; }
.certificate-card__value { font-size: 1.1rem; font-weight: 600; margin-bottom: var(--space-md); }

/* ---------- Certificate PDF Template ---------- */
.cert-pdf {
  width: 297mm; height: 210mm;
  background: #fff;
  color: #1a1a2e;
  position: relative;
  overflow: hidden;
  font-family: 'Outfit', serif;
  padding: 18mm 24mm;
}
.cert-pdf__border {
  position: absolute;
  inset: 8mm;
  border: 2px solid #0f172a;
  border-radius: 4mm;
}
.cert-pdf__border::before {
  content: '';
  position: absolute;
  inset: 3mm;
  border: 1px solid #d4af37;
  border-radius: 3mm;
}
.cert-pdf__header { text-align: center; margin-bottom: 12mm; }
.cert-pdf__logo { font-size: 14pt; color: #0f172a; font-weight: 800; }
.cert-pdf__subtitle { font-size: 10pt; color: #64748b; margin-top: 2mm; }
.cert-pdf__title {
  text-align: center;
  font-size: 28pt;
  color: #0f172a;
  text-transform: uppercase;
  letter-spacing: 3mm;
  margin-bottom: 10mm;
}
.cert-pdf__body { text-align: center; }
.cert-pdf__intro { font-size: 12pt; color: #64748b; margin-bottom: 4mm; }
.cert-pdf__student { font-size: 24pt; font-weight: 700; color: #0891b2; margin-bottom: 6mm; border-bottom: 2px solid #d4af37; display: inline-block; padding-bottom: 2mm; }
.cert-pdf__course-label { font-size: 11pt; color: #64748b; margin-bottom: 2mm; }
.cert-pdf__course { font-size: 16pt; font-weight: 600; color: #0f172a; margin-bottom: 6mm; }
.cert-pdf__date { font-size: 10pt; color: #94a3b8; }
.cert-pdf__footer {
  position: absolute;
  bottom: 18mm; left: 24mm; right: 24mm;
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
}
.cert-pdf__qr { width: 28mm; height: 28mm; }
.cert-pdf__qr img { width: 100%; height: 100%; }
.cert-pdf__id { font-size: 8pt; color: #94a3b8; }
.cert-pdf__watermark {
  position: absolute;
  top: 50%; left: 50%;
  transform: translate(-50%, -50%) rotate(-30deg);
  font-size: 100pt;
  color: rgba(6,182,212,.03);
  font-weight: 900;
  white-space: nowrap;
  pointer-events: none;
}

/* ---------- Page Header ---------- */
.page-header {
  padding: 8rem 0 3rem;
  background: linear-gradient(180deg, rgba(6,182,212,.06) 0%, transparent 100%);
  text-align: center;
}
.page-header h1 { margin-bottom: .5rem; }
.page-header p { color: var(--text-secondary); font-size: 1.05rem; max-width: 540px; margin: 0 auto; }

/* ---------- Footer ---------- */
.footer {
  background: var(--navy-light);
  border-top: 1px solid var(--glass-border);
  padding: var(--space-4xl) 0 var(--space-xl);
}
.footer__grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: var(--space-3xl);
  margin-bottom: var(--space-3xl);
}
.footer__brand p {
  color: var(--text-secondary);
  font-size: .9rem;
  line-height: 1.7;
  margin-top: var(--space-md);
  max-width: 300px;
}
.footer__social {
  display: flex;
  gap: var(--space-sm);
  margin-top: var(--space-lg);
}
.footer__social a {
  width: 40px; height: 40px;
  border-radius: var(--radius-full);
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  display: flex; align-items: center; justify-content: center;
  color: var(--text-secondary);
  transition: all var(--transition-fast);
}
.footer__social a:hover {
  background: var(--cyan);
  color: #fff;
  border-color: var(--cyan);
}
.footer__col-title {
  font-size: .85rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .08em;
  color: var(--text-primary);
  margin-bottom: var(--space-lg);
}
.footer__links li { margin-bottom: .6rem; }
.footer__links a {
  color: var(--text-secondary);
  font-size: .9rem;
  transition: color var(--transition-fast);
}
.footer__links a:hover { color: var(--cyan); }
.footer__bottom {
  border-top: 1px solid var(--glass-border);
  padding-top: var(--space-xl);
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: .85rem;
  color: var(--text-muted);
}
.footer__bottom a { color: var(--text-muted); }
.footer__bottom a:hover { color: var(--cyan); }

/* ---------- Checkout ---------- */
.checkout-layout {
  display: grid;
  grid-template-columns: 1fr 400px;
  gap: var(--space-2xl);
  align-items: start;
}
.order-summary {
  position: sticky;
  top: 100px;
}

/* ---------- FAQ ---------- */
.faq-item {
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-md);
  margin-bottom: var(--space-md);
  overflow: hidden;
}
.faq-item__question {
  width: 100%;
  padding: var(--space-lg);
  background: var(--glass-bg);
  border: none;
  color: var(--text-primary);
  font-weight: 600;
  font-size: .95rem;
  text-align: left;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  transition: background var(--transition-fast);
}
.faq-item__question:hover { background: var(--glass-bg-hover); }
.faq-item__question i { transition: transform var(--transition-fast); color: var(--cyan); }
.faq-item.open .faq-item__question i { transform: rotate(180deg); }
.faq-item__answer {
  padding: 0 var(--space-lg);
  max-height: 0;
  overflow: hidden;
  transition: all var(--transition-base);
  color: var(--text-secondary);
  font-size: .92rem;
  line-height: 1.7;
}
.faq-item.open .faq-item__answer {
  padding: var(--space-md) var(--space-lg) var(--space-lg);
  max-height: 500px;
}

/* ---------- Resource / Library Cards ---------- */
.resource-card {
  display: flex;
  align-items: center;
  gap: var(--space-lg);
  background: var(--gradient-card);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-md);
  padding: var(--space-lg);
  transition: all var(--transition-base);
}
.resource-card:hover {
  border-color: rgba(6,182,212,.2);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}
.resource-card__icon {
  width: 52px; height: 52px;
  border-radius: var(--radius-md);
  display: flex; align-items: center; justify-content: center;
  font-size: 1.3rem;
  flex-shrink: 0;
}
.resource-card__icon--pdf { background: rgba(239,68,68,.12); color: var(--error); }
.resource-card__icon--excel { background: rgba(16,185,129,.12); color: var(--success); }
.resource-card__icon--word { background: rgba(59,130,246,.12); color: var(--info); }
.resource-card__icon--video { background: rgba(6,182,212,.12); color: var(--cyan); }
.resource-card__body { flex: 1; }
.resource-card__title { font-weight: 600; font-size: .95rem; margin-bottom: .15rem; }
.resource-card__desc { color: var(--text-muted); font-size: .85rem; }
.resource-card__actions { display: flex; gap: .5rem; }
.resource-card.locked { opacity: .6; }
.resource-card.locked::after {
  content: '\f023';
  font-family: 'Font Awesome 6 Free';
  font-weight: 900;
  color: var(--amber);
  font-size: 1.1rem;
}

/* ---------- Event Cards ---------- */
.event-card {
  display: flex;
  gap: var(--space-lg);
  background: var(--gradient-card);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  padding: var(--space-xl);
  transition: all var(--transition-base);
}
.event-card:hover { border-color: rgba(6,182,212,.2); transform: translateY(-2px); }
.event-card__date {
  text-align: center;
  min-width: 60px;
  flex-shrink: 0;
}
.event-card__day {
  font-size: 1.8rem;
  font-weight: 800;
  color: var(--cyan);
  line-height: 1;
  font-family: 'Outfit', sans-serif;
}
.event-card__month {
  font-size: .8rem;
  color: var(--text-muted);
  text-transform: uppercase;
}
.event-card__body { flex: 1; }
.event-card__title { font-size: 1.05rem; font-weight: 600; margin-bottom: .25rem; }
.event-card__time { color: var(--text-muted); font-size: .85rem; margin-bottom: .5rem; }
.event-card__badges { display: flex; gap: .5rem; flex-wrap: wrap; }

/* ---------- Empty State ---------- */
.empty-state {
  text-align: center;
  padding: var(--space-4xl) var(--space-xl);
}
.empty-state__icon {
  font-size: 3rem;
  color: var(--text-muted);
  margin-bottom: var(--space-lg);
}
.empty-state__title { font-size: 1.3rem; margin-bottom: .5rem; }
.empty-state__text { color: var(--text-secondary); max-width: 400px; margin: 0 auto var(--space-xl); }

/* ---------- Exam ---------- */
.exam-timer {
  position: sticky;
  top: 80px;
  background: var(--navy-light);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-md);
  padding: var(--space-md) var(--space-lg);
  display: flex;
  align-items: center;
  justify-content: space-between;
  z-index: 10;
}
.exam-timer__time {
  font-size: 1.5rem;
  font-weight: 800;
  font-family: 'Outfit', sans-serif;
  color: var(--cyan);
}
.exam-timer__time.warning { color: var(--amber); }
.exam-timer__time.danger { color: var(--error); animation: pulse 1s ease infinite; }

.exam-question {
  background: var(--gradient-card);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  padding: var(--space-xl);
  margin-bottom: var(--space-lg);
}
.exam-question__number {
  font-size: .85rem;
  color: var(--cyan);
  font-weight: 600;
  margin-bottom: .5rem;
}
.exam-question__text { font-size: 1.05rem; margin-bottom: var(--space-lg); }

.exam-option {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  padding: var(--space-md) var(--space-lg);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-md);
  margin-bottom: .5rem;
  cursor: pointer;
  transition: all var(--transition-fast);
}
.exam-option:hover { border-color: var(--cyan); background: rgba(6,182,212,.05); }
.exam-option.selected { border-color: var(--cyan); background: rgba(6,182,212,.1); }
.exam-option.correct { border-color: var(--success); background: rgba(16,185,129,.1); }
.exam-option.incorrect { border-color: var(--error); background: rgba(239,68,68,.1); }

.exam-nav {
  display: flex;
  flex-wrap: wrap;
  gap: .4rem;
}
.exam-nav__dot {
  width: 36px; height: 36px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--glass-border);
  background: var(--glass-bg);
  display: flex; align-items: center; justify-content: center;
  font-size: .8rem; font-weight: 600;
  cursor: pointer;
  transition: all var(--transition-fast);
  color: var(--text-muted);
}
.exam-nav__dot:hover { border-color: var(--cyan); }
.exam-nav__dot.active { background: var(--cyan); color: #fff; border-color: var(--cyan); }
.exam-nav__dot.answered { background: rgba(6,182,212,.15); color: var(--cyan); border-color: var(--cyan); }

/* ---------- Back to Top ---------- */
.back-to-top {
  position: fixed;
  bottom: var(--space-xl);
  right: var(--space-xl);
  width: 46px; height: 46px;
  background: var(--gradient-cyan);
  color: #fff;
  border: none;
  border-radius: var(--radius-full);
  font-size: 1.1rem;
  display: flex; align-items: center; justify-content: center;
  box-shadow: var(--shadow-cyan);
  opacity: 0;
  visibility: hidden;
  transform: translateY(10px);
  transition: all var(--transition-base);
  z-index: var(--z-dropdown);
  cursor: pointer;
}
.back-to-top.visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}
.back-to-top:hover { transform: translateY(-3px); }

/* ---------- Filter Buttons ---------- */
.filter-bar {
  display: flex;
  gap: .5rem;
  flex-wrap: wrap;
  margin-bottom: var(--space-2xl);
  justify-content: center;
}
.filter-btn {
  padding: .5rem 1.2rem;
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-full);
  color: var(--text-secondary);
  font-weight: 500;
  font-size: .88rem;
  cursor: pointer;
  transition: all var(--transition-fast);
}
.filter-btn:hover { color: var(--text-primary); border-color: var(--cyan); }
.filter-btn.active {
  background: var(--cyan);
  color: var(--navy);
  border-color: var(--cyan);
}

/* ---------- Animations ---------- */
@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}
@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}
@keyframes slideDown {
  from { opacity: 0; transform: translateY(-10px); }
  to { opacity: 1; transform: translateY(0); }
}
@keyframes slideUp {
  from { opacity: 0; transform: translateY(30px); }
  to { opacity: 1; transform: translateY(0); }
}
@keyframes scaleIn {
  from { opacity: 0; transform: scale(.9); }
  to { opacity: 1; transform: scale(1); }
}
@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: .5; }
}
@keyframes shimmer {
  0% { transform: translateX(-100%); }
  100% { transform: translateX(100%); }
}
@keyframes heroFloat {
  0%, 100% { transform: translate(0, 0) rotate(0deg); }
  33% { transform: translate(20px, -20px) rotate(1deg); }
  66% { transform: translate(-15px, 15px) rotate(-1deg); }
}
@keyframes float {
  0%, 100% { transform: translateY(0); opacity: .3; }
  50% { transform: translateY(-30px); opacity: .6; }
}
@keyframes countUp {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}

.animate-on-scroll {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity .6s ease, transform .6s ease;
}
.animate-on-scroll.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ---------- Responsive ---------- */
@media (max-width: 1280px) {
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .footer__grid { grid-template-columns: 2fr 1fr 1fr; }
  .checkout-layout { grid-template-columns: 1fr 360px; }
}

@media (max-width: 1024px) {
  .dashboard { grid-template-columns: 1fr; }
  .dashboard__sidebar {
    position: static;
    height: auto;
    border-right: none;
    border-bottom: 1px solid var(--glass-border);
    display: flex;
    flex-wrap: wrap;
    padding: var(--space-md);
    gap: .25rem;
  }
  .dashboard__sidebar-title { display: none; }
  .sidebar-link {
    border-left: none;
    border-radius: var(--radius-sm);
    padding: .5rem .8rem;
    font-size: .85rem;
  }
  .sidebar-link.active { border-left: none; }

  .player-layout { grid-template-columns: 1fr; }
  .player-layout__sidebar {
    position: static;
    max-height: none;
    border-left: none;
    border-top: 1px solid var(--glass-border);
  }

  .grid-3 { grid-template-columns: repeat(2, 1fr); }
  .pricing-card--featured { transform: scale(1); }
  .pricing-card--featured:hover { transform: translateY(-4px); }
  .checkout-layout { grid-template-columns: 1fr; }
}

@media (max-width: 768px) {
  .navbar__links { display: none; }
  .navbar__toggle { display: block; }

  .hero { min-height: auto; padding: 7rem 0 3rem; }
  .hero__actions { flex-direction: column; }
  .hero__actions .btn { width: 100%; }

  .stats-bar__grid { grid-template-columns: repeat(2, 1fr); }

  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
  .auth-page { grid-template-columns: 1fr; }
  .auth-page__left { display: none; }

  .footer__grid { grid-template-columns: 1fr 1fr; }
  .footer__bottom { flex-direction: column; gap: var(--space-md); text-align: center; }

  .timeline::before { left: 24px; }
  .timeline__item,
  .timeline__item:nth-child(even) { flex-direction: column; padding-left: 3.5rem; }
  .timeline__dot { left: 24px; }
  .timeline__content { width: 100%; }

  .section { padding: var(--space-3xl) 0; }
  .container { padding: 0 var(--space-md); }

  .event-card { flex-direction: column; }
}

@media (max-width: 480px) {
  html { font-size: 15px; }
  .stats-bar__grid { grid-template-columns: 1fr 1fr; gap: var(--space-md); }
  .btn-lg { padding: .85rem 1.5rem; font-size: 1rem; }
  .pricing-card { padding: var(--space-xl); }
  .dashboard__main { padding: var(--space-lg); }
  .messages-container { left: var(--space-md); right: var(--space-md); max-width: none; }
}

/* ---------- Utilities ---------- */
.sr-only {
  position: absolute; width: 1px; height: 1px;
  padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0,0,0,0);
  white-space: nowrap; border: 0;
}
.truncate { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.no-scrollbar { scrollbar-width: none; -ms-overflow-style: none; }
.no-scrollbar::-webkit-scrollbar { display: none; }

/* Security / trust badges */
.trust-badges {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-xl);
  margin-top: var(--space-xl);
  color: var(--text-muted);
  font-size: .85rem;
}
.trust-badges span {
  display: flex;
  align-items: center;
  gap: .4rem;
}
.trust-badges i { color: var(--success); }

/* Quick action cards (admin) */
.quick-action {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  padding: var(--space-md) var(--space-lg);
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-md);
  color: var(--text-secondary);
  transition: all var(--transition-fast);
  text-decoration: none;
}
.quick-action:hover {
  border-color: var(--cyan);
  color: var(--text-primary);
  background: rgba(6,182,212,.05);
}
.quick-action i { color: var(--cyan); font-size: 1.1rem; }

/* Membership card (dashboard) */
.membership-card {
  background: linear-gradient(135deg, rgba(6,182,212,.1), rgba(245,158,11,.05));
  border: 1px solid rgba(6,182,212,.2);
  border-radius: var(--radius-xl);
  padding: var(--space-2xl);
  position: relative;
  overflow: hidden;
}
.membership-card::before {
  content: '';
  position: absolute;
  top: -50%; right: -30%;
  width: 300px; height: 300px;
  background: radial-gradient(circle, rgba(6,182,212,.08), transparent 70%);
}
.membership-card__plan {
  font-size: 1.5rem;
  font-weight: 800;
  margin-bottom: .25rem;
  position: relative;
}
.membership-card__price {
  color: var(--cyan);
  font-size: 1.8rem;
  font-weight: 800;
  font-family: 'Outfit', sans-serif;
}