:root {
  --bg: #f8fafc;
  --surface: #ffffff;
  --surface-soft: #f1f5f9;
  --border: #e2e8f0;
  --border-soft: #eef2f7;
  --text: #334155;
  --heading: #0f172a;
  --muted: #64748b;
  --primary: #4f46e5;
  --primary-dark: #4338ca;
  --primary-soft: #eef2ff;
  --primary-border: #c7d2fe;
  --gradient: linear-gradient(135deg, #6366f1 0%, #4f46e5 60%, #7c3aed 115%);
  --success: #16a34a;
  --success-soft: #f0fdf4;
  --success-border: #bbf7d0;
  --danger: #dc2626;
  --danger-soft: #fef2f2;
  --danger-border: #fecaca;
  --warning: #d97706;
  --warning-soft: #fffbeb;
  --warning-border: #fde68a;
  --info: #0891b2;
  --info-soft: #ecfeff;
  --info-border: #a5f3fc;
  --font-body: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-display: "Sora", "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --radius: 16px;
  --radius-sm: 10px;
  --shadow-sm: 0 1px 3px rgba(15, 23, 42, 0.06), 0 1px 2px rgba(15, 23, 42, 0.03);
  --shadow-md: 0 10px 28px -8px rgba(15, 23, 42, 0.14);
  --shadow-lg: 0 24px 56px -16px rgba(15, 23, 42, 0.2);
  --shadow-glow: 0 14px 34px -12px rgba(99, 102, 241, 0.45);
  --header-h: 60px;
}

* {
  box-sizing: border-box;
}

html {
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

img {
  display: block;
  max-width: 100%;
  height: auto;
}

a {
  color: var(--primary);
  text-decoration: none;
}

a:hover {
  color: var(--primary-dark);
}

h1, h2, h3, h4, h5, h6 {
  margin: 0 0 0.5rem;
  color: var(--heading);
  font-family: var(--font-display);
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: -0.022em;
}

::selection {
  background: rgba(99, 102, 241, 0.25);
}

:focus-visible {
  outline: 3px solid rgba(99, 102, 241, 0.35);
  outline-offset: 2px;
}

p {
  margin: 0 0 1rem;
}

ul {
  margin: 0;
  padding: 0;
  list-style: none;
}

button,
input,
select,
textarea {
  font: inherit;
  color: inherit;
}

button {
  cursor: pointer;
}

i[class*="fa-"] {
  display: inline-block;
}

.container {
  width: 100%;
  max-width: 1180px;
  margin: 0 auto;
  padding: 0 24px;
}

.main-content {
  min-height: 60vh;
}

.section-header {
  max-width: 640px;
  margin: 0 auto 40px;
  text-align: center;
}

.section-header h2 {
  font-size: 1.85rem;
}

.section-header h2::before {
  content: "";
  display: block;
  width: 44px;
  height: 4px;
  margin: 0 auto 14px;
  border-radius: 999px;
  background: var(--gradient);
}

.section-header p {
  margin: 0;
  color: var(--muted);
  font-size: 1.02rem;
}

.section-title {
  margin-bottom: 24px;
  text-align: center;
  font-size: 1.4rem;
}

.text-center {
  text-align: center;
}

.text-muted {
  color: var(--muted) !important;
}

.animate-in {
  opacity: 1 !important;
  transform: none !important;
}

.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 300;
  background: rgba(255, 255, 255, 0.72);
  -webkit-backdrop-filter: blur(16px);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid rgba(226, 232, 240, 0.85);
}

.header.scrolled {
  background: rgba(255, 255, 255, 0.9);
  box-shadow: 0 10px 28px -16px rgba(15, 23, 42, 0.22);
}

.nav-container {
  display: flex;
  align-items: center;
  gap: 20px;
  max-width: 1180px;
  height: var(--header-h);
  margin: 0 auto;
  padding: 0 24px;
}

.logo {
  font-size: 1.18rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  color: var(--heading);
  font-family: var(--font-display);
}

.logo a {
  color: var(--heading);
}

.logo span {
  color: var(--primary);
  background: var(--gradient);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.logo img {
  display: block;
  height: 38px;
  width: auto;
}

body.dark-mode .logo img {
  filter: invert(1) hue-rotate(180deg);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 4px;
}

.nav-links a {
  position: relative;
  padding: 8px 12px;
  border-radius: var(--radius-sm);
  color: var(--muted);
  font-size: 0.875rem;
  font-weight: 500;
  letter-spacing: 0.01em;
  transition: color 0.18s, background 0.18s;
}

.nav-links a::after {
  content: "";
  position: absolute;
  left: 12px;
  right: 12px;
  bottom: 3px;
  height: 2px;
  border-radius: 2px;
  background: var(--gradient);
  transform: scaleX(0);
  transform-origin: center;
  transition: transform 0.2s ease;
}

.nav-links a:hover {
  background: var(--surface-soft);
  color: var(--heading);
}

.nav-links a:hover::after {
  transform: scaleX(1);
}

.nav-links a:focus-visible {
  outline: 3px solid rgba(99, 102, 241, 0.35);
  outline-offset: 2px;
}

.nav-links a.active {
  background: var(--primary-soft);
  color: var(--primary);
  font-weight: 600;
}

.nav-links a.active::after {
  transform: scaleX(1);
}

.nav-links a.active:hover {
  background: var(--primary-soft);
  color: var(--primary);
}

.nav-search {
  margin-left: auto;
}

.search-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border: 1px solid var(--border);
  border-radius: 50%;
  background: transparent;
  color: var(--muted);
  transition: background 0.15s, color 0.15s, border-color 0.15s, transform 0.15s;
}

.search-toggle:hover {
  background: var(--surface-soft);
  color: var(--primary);
  border-color: var(--primary);
  transform: translateY(-1px);
}

.search-toggle:focus-visible {
  outline: 3px solid rgba(99, 102, 241, 0.35);
  outline-offset: 2px;
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 8px;
}

.nav-user {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 4px 12px 4px 4px;
  border-radius: 999px;
  background: var(--surface-soft);
  color: var(--heading);
  font-size: 0.875rem;
  font-weight: 500;
}

.nav-avatar {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 26px;
  height: 26px;
  border-radius: 50%;
  background: var(--gradient);
  color: #fff;
  font-size: 0.75rem;
  font-weight: 700;
}

.nav-user-name {
  max-width: 130px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

@media (max-width: 1100px) {
  .nav-user-name {
    display: none;
  }

  .nav-user {
    padding: 4px;
  }
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 10px 20px;
  border: 1px solid transparent;
  border-radius: 999px;
  background: var(--gradient);
  color: #fff;
  font-size: 0.9rem;
  font-weight: 600;
  line-height: 1.3;
  text-align: center;
  white-space: nowrap;
  box-shadow: 0 8px 20px -10px rgba(79, 70, 229, 0.55);
  transition: transform 0.15s, box-shadow 0.15s, filter 0.15s, background 0.15s, color 0.15s, border-color 0.15s;
}

.btn:hover {
  background: var(--gradient);
  color: #fff;
  filter: brightness(1.06);
  transform: translateY(-1px);
  box-shadow: 0 12px 26px -10px rgba(79, 70, 229, 0.6);
}

.btn:focus-visible {
  outline: 3px solid rgba(99, 102, 241, 0.35);
  outline-offset: 2px;
}

.btn-primary {
  background: var(--gradient);
  color: #fff;
}

.btn-primary:hover {
  background: var(--gradient);
  color: #fff;
}

.btn-secondary {
  background: var(--surface);
  border-color: var(--border);
  color: var(--heading);
  box-shadow: none;
}

.btn-secondary:hover {
  background: var(--surface);
  border-color: #c7d2fe;
  color: var(--primary-dark);
  box-shadow: var(--shadow-sm);
  filter: none;
}

.btn-outline {
  background: transparent;
  border-color: var(--primary-border);
  color: var(--primary-dark);
  box-shadow: none;
}

.btn-outline:hover {
  background: var(--primary-soft);
  color: var(--primary-dark);
  box-shadow: none;
  filter: none;
}

.btn-ghost {
  background: transparent;
  border-color: transparent;
  color: var(--muted);
  box-shadow: none;
}

.btn-ghost:hover {
  background: var(--surface-soft);
  color: var(--heading);
  box-shadow: none;
  filter: none;
  transform: none;
}

.btn-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  min-height: 36px;
  padding: 8px 0;
  background: none;
  border: none;
  color: var(--primary);
  font-weight: 600;
  box-shadow: none;
}

.btn-link:hover {
  background: none;
  color: var(--primary-dark);
  text-decoration: underline;
  box-shadow: none;
  filter: none;
  transform: none;
}

.auth-quick-link {
  display: inline-flex;
  align-items: center;
  min-height: 32px;
}

@media (max-width: 768px) {
  .auth-quick-link {
    min-height: 44px;
    padding: 0 4px;
  }
}

.table-scroll {
  max-width: 100%;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

.table-container {
  max-width: 100%;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

.btn-sm {
  padding: 7px 14px;
  font-size: 0.83rem;
}

.btn-lg {
  padding: 14px 30px;
  font-size: 1rem;
}

.btn-submit {
  width: 100%;
  padding: 12px 22px;
  background: var(--gradient);
  color: #fff;
}

.btn-submit:hover {
  background: var(--gradient);
}

.btn-submit.loading {
  position: relative;
  pointer-events: none;
  opacity: 0.85;
  transform: none;
}

.btn-submit.loading::after {
  content: "";
  display: inline-block;
  width: 14px;
  height: 14px;
  margin-left: 8px;
  vertical-align: -2px;
  border: 2px solid rgba(255, 255, 255, 0.5);
  border-top-color: #fff;
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

.btn-delete,
.btn-cancel {
  background: linear-gradient(135deg, #ef4444, #dc2626);
  color: #fff;
}

.btn-delete:hover,
.btn-cancel:hover {
  background: linear-gradient(135deg, #f87171, #dc2626);
  color: #fff;
  filter: none;
}

.btn-edit,
.btn-export,
.btn-pdf,
.btn-print,
.btn-view,
.btn-download,
.btn-reply,
.btn-back {
  background: var(--surface);
  border-color: var(--border);
  color: var(--text);
  box-shadow: none;
}

.btn-edit:hover,
.btn-export:hover,
.btn-pdf:hover,
.btn-print:hover,
.btn-view:hover,
.btn-download:hover,
.btn-reply:hover,
.btn-back:hover {
  background: var(--surface-soft);
  color: var(--heading);
  filter: none;
  transform: none;
  box-shadow: none;
}

.btn-cert {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 34px;
  background: var(--gradient);
  color: #fff;
  box-shadow: 0 8px 20px -10px rgba(79, 70, 229, 0.55);
}

.btn-action {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 34px;
  padding: 7px 14px;
  background: var(--surface);
  border-color: var(--border);
  color: var(--text);
  font-size: 0.85rem;
  box-shadow: none;
}

.btn-action:hover {
  background: var(--surface-soft);
  color: var(--heading);
  filter: none;
  transform: none;
  box-shadow: none;
}

.move-arrow {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 34px;
  height: 34px;
  min-height: 34px;
  margin-left: 4px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--surface);
  color: var(--muted);
  font-size: 0.8rem;
  transition: border-color 0.15s, color 0.15s, background 0.15s;
}

.move-arrow:hover {
  border-color: var(--primary);
  color: var(--primary);
  background: var(--primary-soft);
}

.btn-exam-nav {
  background: var(--surface);
  border-color: var(--border);
  color: var(--text);
  box-shadow: none;
}

.btn-exam-nav:hover {
  background: var(--surface-soft);
  color: var(--heading);
  filter: none;
  transform: none;
  box-shadow: none;
}

.badge {
  display: inline-flex;
  align-items: center;
  padding: 3px 10px;
  border-radius: 999px;
  font-size: 0.75rem;
  font-weight: 600;
  line-height: 1.5;
}

.badge-success {
  background: var(--success-soft);
  color: var(--success);
}

.badge-warning {
  background: var(--warning-soft);
  color: var(--warning);
}

.badge-danger {
  background: var(--danger-soft);
  color: var(--danger);
}

.badge-info {
  background: var(--info-soft);
  color: var(--info);
}

.alert {
  padding: 12px 16px;
  border: 1px solid;
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  margin-bottom: 1rem;
}

.alert-success {
  background: var(--success-soft);
  border-color: var(--success-border);
  color: #166534;
}

.alert-danger {
  background: var(--danger-soft);
  border-color: var(--danger-border);
  color: #991b1b;
}

.alert-warning {
  background: #fffbeb;
  border-color: #fcd34d;
  color: #92400e;
}

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
  transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
}

.card:hover {
  border-color: var(--primary-border);
  box-shadow: var(--shadow-lg), 0 0 0 1px rgba(99, 102, 241, 0.08);
  transform: translateY(-4px) !important;
}

.card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
  padding: 16px 20px;
  border-bottom: 1px solid var(--border-soft);
}

.card-header h1,
.card-header h2,
.card-header h3,
.card-header h4 {
  margin: 0;
  font-size: 1.02rem;
}

.card-header-right {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-shrink: 1;
  flex-wrap: wrap;
}

.card-body {
  padding: 20px;
}

.card-content {
  padding: 18px 20px;
}

.card-image {
  position: relative;
  background: var(--surface-soft);
}

.card-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.card-grid {
  display: grid;
  gap: 20px;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
}

.page-hero {
  position: relative;
  overflow: hidden;
  padding: 56px 24px 52px;
  background:
    radial-gradient(60% 120% at 12% 0%, rgba(99, 102, 241, 0.16), transparent 60%),
    radial-gradient(50% 100% at 88% 10%, rgba(124, 58, 237, 0.14), transparent 55%),
    linear-gradient(180deg, #eef2ff 0%, var(--bg) 100%);
  border-bottom: 1px solid var(--border);
  text-align: center;
}

.page-hero h1 {
  font-size: 2rem;
}

.page-hero p {
  max-width: 620px;
  margin: 6px auto 0;
  color: var(--muted);
}

.hero {
  position: relative;
  overflow: hidden;
  padding: 76px 0 72px;
  background:
    radial-gradient(55% 75% at 12% 8%, rgba(99, 102, 241, 0.2), transparent 60%),
    radial-gradient(45% 65% at 85% 18%, rgba(124, 58, 237, 0.16), transparent 55%),
    radial-gradient(65% 55% at 50% 115%, rgba(56, 189, 248, 0.14), transparent 60%),
    linear-gradient(180deg, #eef2ff 0%, var(--bg) 100%);
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.05fr 1fr;
  gap: 56px;
  align-items: center;
}

.hero-content h1 {
  margin-bottom: 18px;
  font-size: 2.75rem;
  line-height: 1.08;
}

.hero-content p {
  max-width: 34em;
  color: var(--muted);
  font-size: 1.1rem;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 10px;
}

.hero-image {
  position: relative;
}

.hero-image::before {
  content: "";
  position: absolute;
  inset: -18% -14%;
  z-index: 0;
  background: radial-gradient(60% 60% at 50% 50%, rgba(99, 102, 241, 0.22), transparent 70%);
  filter: blur(10px);
}

.hero-image img {
  position: relative;
  z-index: 1;
  width: 100%;
  border-radius: 24px;
  box-shadow: var(--shadow-lg);
}

.trusted-section {
  padding: 36px 0;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
}

.trusted-tagline {
  margin-bottom: 20px;
  color: var(--muted);
  font-size: 0.82rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-align: center;
  text-transform: uppercase;
}

.partner-logos {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 16px 40px;
}

.partner-logos span {
  color: #94a3b8;
  font-size: 1.05rem;
  font-weight: 700;
  letter-spacing: 0.02em;
}

.skills-section,
.courses-section,
.stats-section,
.testimonials-section,
.values-section,
.why-choose-section,
.team-section,
.blog-list,
.faq-section,
.contact-section,
.legal-section,
.about-section,
.testimonials-section {
  padding: 56px 0;
}

.skills-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.skills-pills {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 10px;
}

.skill-pill {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  padding: 6px 16px 6px 6px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 999px;
  color: var(--text);
  font-size: 0.875rem;
  font-weight: 600;
  transition: transform 0.2s, box-shadow 0.2s, border-color 0.2s, background 0.2s, color 0.2s;
}

.skill-pill:hover {
  transform: translateY(-2px);
  border-color: var(--primary);
  background: var(--primary-soft);
  color: var(--heading);
  box-shadow: var(--shadow-sm);
}

.skill-pill:focus-visible {
  outline: 2px solid var(--primary);
  outline-offset: 2px;
}

.skill-pill-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 30px;
  height: 30px;
  border-radius: 50%;
  background: var(--primary-soft);
  color: var(--primary);
  font-size: 0.8rem;
  transition: background 0.2s, color 0.2s;
}

.skill-pill-count {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 22px;
  height: 22px;
  padding: 0 7px;
  border-radius: 999px;
  background: var(--surface-soft);
  color: var(--muted);
  font-size: 0.72rem;
  font-weight: 700;
  transition: background 0.2s, color 0.2s;
}

.skill-pill:hover .skill-pill-icon {
  background: var(--primary);
  color: #fff;
}

.skill-pill:hover .skill-pill-count {
  background: var(--primary);
  color: #fff;
}

@media (max-width: 768px) {
  .skills-pills {
    gap: 8px;
  }

  .skill-pill {
    font-size: 0.82rem;
  }
}

.courses-section .container:has(> .category-sidebar) {
  display: flex;
  gap: 28px;
  align-items: flex-start;
}

.category-sidebar {
  flex: 0 0 230px;
  position: sticky;
  top: calc(var(--header-h) + 20px);
  padding: 20px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}

.category-sidebar h2 {
  margin-bottom: 12px;
  font-size: 0.95rem;
}

.category-sidebar ul {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.category-sidebar a {
  display: block;
  padding: 8px 12px;
  border-radius: var(--radius-sm);
  color: var(--text);
  font-size: 0.9rem;
}

.category-sidebar a:hover {
  background: var(--surface-soft);
  color: var(--heading);
}

.category-sidebar a.active {
  background: var(--primary-soft);
  color: var(--primary);
  font-weight: 600;
}

.courses-main {
  flex: 1;
  min-width: 0;
}

.courses-toolbar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  margin-bottom: 22px;
}

.courses-count {
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--muted);
  font-size: 0.9rem;
}

.courses-count .search-label {
  padding: 2px 8px;
  border-radius: 999px;
  background: var(--surface-soft);
  color: var(--text);
  font-size: 0.8rem;
}

.courses-sort {
  display: flex;
  align-items: center;
  gap: 10px;
}

.courses-search-input {
  width: 200px;
  padding: 8px 14px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  font-size: 0.88rem;
}

.courses-search-input:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.18);
}

.sort-select {
  padding: 8px 14px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  font-size: 0.88rem;
  cursor: pointer;
}

.sort-select:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.18);
}

.courses-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(255px, 1fr));
  gap: 20px;
}

.course-card {
  display: flex;
  flex-direction: column;
  overflow: hidden;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--text);
  transition: transform 0.2s, box-shadow 0.2s;
}

.course-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
  color: var(--text);
}

.course-card-image {
  width: 100%;
  height: 150px;
  object-fit: cover;
  background: var(--surface-soft);
}

.course-card-body {
  display: flex;
  flex-direction: column;
  flex: 1;
  padding: 16px 18px 18px;
}

.course-card-title {
  margin-bottom: 4px;
  font-size: 0.98rem;
  line-height: 1.35;
}

.course-card-instructor {
  margin-bottom: 8px;
  color: var(--muted);
  font-size: 0.84rem;
}

.course-card-rating {
  display: flex;
  align-items: center;
  gap: 6px;
  margin-bottom: 8px;
}

.rating-score {
  color: var(--heading);
  font-size: 0.85rem;
  font-weight: 700;
}

.rating-stars {
  color: #f59e0b;
  font-size: 0.72rem;
}

.rating-count {
  color: var(--muted);
  font-size: 0.8rem;
}

.course-card-meta {
  display: flex;
  align-items: center;
  gap: 6px;
  margin-bottom: 8px;
  color: var(--muted);
  font-size: 0.82rem;
}

.course-card-meta i {
  color: var(--muted);
}

.course-card-price {
  margin-top: auto;
  margin-bottom: 0;
  color: var(--heading);
  font-size: 1rem;
  font-weight: 700;
}

.course-card-body h3 {
  color: var(--heading);
}

.course-card-body p {
  color: var(--muted);
  font-size: 0.88rem;
}

.course-card-actions {
  display: flex;
  gap: 8px;
  margin-top: 14px;
}

.course-card-actions .btn {
  flex: 1;
}

.card.course-card .card-image img {
  height: 160px;
}

.card.course-card .card-image .course-price {
  position: absolute;
  left: 12px;
  bottom: 12px;
  padding: 4px 10px;
  border-radius: 999px;
  background: var(--heading);
  color: #fff;
  font-size: 0.82rem;
  font-weight: 700;
}

.card.course-card {
  transition: transform 0.22s ease, box-shadow 0.22s ease;
}

.card.course-card .card-image {
  overflow: hidden;
  background: linear-gradient(135deg, #eef2ff 0%, #e0e7ff 100%);
}

body.dark-mode .card.course-card .card-image {
  background: linear-gradient(135deg, rgba(99, 102, 241, 0.18) 0%, rgba(124, 58, 237, 0.14) 100%);
}

.card.course-card .card-image img {
  display: block;
  height: 160px;
  transition: transform 0.45s cubic-bezier(0.22, 1, 0.36, 1);
  opacity: 0.97;
}

.card.course-card:hover .card-image img {
  transform: scale(1.06);
}

.card.course-card .card-image .course-price {
  left: auto;
  right: 12px;
  bottom: 12px;
  z-index: 2;
  background: var(--gradient);
  box-shadow: 0 4px 14px rgba(79, 70, 229, 0.4);
}

.course-cat-badge {
  position: absolute;
  top: 12px;
  left: 12px;
  z-index: 2;
  padding: 5px 11px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.92);
  color: var(--primary);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  box-shadow: 0 2px 8px rgba(15, 23, 42, 0.14);
}

.course-meta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 10px;
  color: var(--muted);
  font-size: 0.82rem;
}

.course-meta-row span {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.course-meta-row i {
  color: var(--primary);
}

.course-card .card-content {
  display: flex;
  flex-direction: column;
  flex: 1;
}

.course-card .card-content h3 {
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  min-height: 2.7em;
  margin: 0 0 6px;
  font-size: 0.98rem;
  line-height: 1.35;
}

.course-card .card-content > p {
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  min-height: 3em;
  margin: 0;
  color: var(--muted);
  font-size: 0.86rem;
  line-height: 1.5;
}

.course-card .course-card-actions {
  margin-top: auto;
}

.course-card .course-card-actions .btn {
  padding: 7px 10px;
  font-size: 0.78rem;
  white-space: nowrap;
}

.course-category {
  display: inline-block;
  margin-bottom: 8px;
  color: var(--primary);
  font-size: 0.74rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

/* Course detail page */
.course-detail-hero {
  padding: 40px 0 52px;
  background:
    radial-gradient(60% 120% at 0% 0%, rgba(99, 102, 241, 0.14), transparent 60%),
    radial-gradient(50% 100% at 100% 10%, rgba(124, 58, 237, 0.12), transparent 55%),
    linear-gradient(180deg, #eef2ff 0%, var(--bg) 100%);
  border-bottom: 1px solid var(--border);
}

body.dark-mode .course-detail-hero {
  background:
    radial-gradient(60% 120% at 0% 0%, rgba(99, 102, 241, 0.16), transparent 60%),
    radial-gradient(50% 100% at 100% 10%, rgba(124, 58, 237, 0.13), transparent 55%),
    linear-gradient(180deg, var(--surface) 0%, var(--bg) 100%);
}

.course-detail-grid {
  display: grid;
  grid-template-columns: minmax(320px, 470px) 1fr;
  gap: 44px;
  align-items: start;
}

.course-detail-image {
  position: relative;
  border-radius: var(--radius);
  overflow: hidden;
  background: linear-gradient(135deg, #eef2ff 0%, #e0e7ff 100%);
  box-shadow: var(--shadow-lg);
}

body.dark-mode .course-detail-image {
  background: linear-gradient(135deg, rgba(99, 102, 241, 0.18) 0%, rgba(124, 58, 237, 0.14) 100%);
}

.course-detail-image img {
  display: block;
  width: 100%;
  height: 360px;
  object-fit: cover;
}

.course-detail-info {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
}

.course-detail-info h1 {
  margin: 6px 0 10px;
  font-size: 1.9rem;
  line-height: 1.25;
  color: var(--heading);
}

.course-detail-desc {
  margin: 0;
  color: var(--muted);
  font-size: 0.95rem;
  line-height: 1.7;
  max-width: 640px;
}

.course-detail-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 14px;
  margin: 24px 0;
}

.meta-item {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 9px 14px;
  border: 1px solid var(--border);
  border-radius: 12px;
  background: var(--surface-soft);
  color: var(--muted);
  font-size: 0.84rem;
  font-weight: 500;
}

.meta-item i {
  color: var(--primary);
}

.course-detail-price {
  display: flex;
  align-items: baseline;
  gap: 10px;
  margin: 4px 0 20px;
}

.price-label {
  color: var(--muted);
  font-size: 0.85rem;
}

.price-amount {
  color: var(--heading);
  font-size: 1.9rem;
  font-weight: 800;
  background: var(--gradient);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.course-detail-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.course-detail-actions .btn {
  padding: 12px 24px;
  font-size: 0.92rem;
}

.course-instructor {
  padding: 32px 0 8px;
}

.course-features {
  padding: 8px 0 60px;
}

.course-instructor h2,
.course-features h2 {
  margin: 0 0 22px;
  color: var(--heading);
}

.instructor-card {
  display: flex;
  align-items: center;
  gap: 18px;
  padding: 22px 24px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface);
  box-shadow: var(--shadow-sm);
}

.instructor-avatar {
  width: 64px;
  height: 64px;
  flex-shrink: 0;
  display: grid;
  place-items: center;
  border-radius: 50%;
  background: var(--gradient);
  color: #fff;
  font-size: 1.5rem;
}

.instructor-info h3 {
  margin: 0 0 4px;
  color: var(--heading);
}

.instructor-info p {
  margin: 0;
  color: var(--muted);
  font-size: 0.9rem;
  line-height: 1.6;
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 14px;
}

.feature-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 14px 16px;
  border: 1px solid var(--border);
  border-radius: 12px;
  background: var(--surface);
  color: var(--text);
  font-size: 0.88rem;
}

.feature-item i {
  color: var(--primary);
}

.course-curriculum {
  padding: 0 0 50px;
}

.course-curriculum h2 {
  margin: 0 0 6px;
  color: var(--heading);
}

.curriculum-summary {
  margin: 0 0 20px;
  color: var(--muted);
  font-size: 0.9rem;
}

.curriculum-list {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
}

.curriculum-item {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 14px 18px;
  border-bottom: 1px solid var(--border);
  transition: background 0.15s;
}

.curriculum-item:last-child {
  border-bottom: none;
}

.curriculum-item:hover {
  background: var(--surface-soft);
}

.curriculum-icon {
  display: grid;
  place-items: center;
  width: 30px;
  height: 30px;
  flex-shrink: 0;
  border-radius: 50%;
  background: var(--surface-soft);
  color: var(--muted);
  font-size: 0.85rem;
}

.curriculum-item.is-free .curriculum-icon {
  background: var(--primary-soft);
  color: var(--primary);
}

.curriculum-title {
  flex: 1;
  font-size: 0.92rem;
  font-weight: 500;
  color: var(--text);
}

.curriculum-free-tag {
  display: inline-block;
  margin-left: 8px;
  padding: 2px 8px;
  border-radius: 999px;
  background: var(--primary-soft);
  color: var(--primary);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  vertical-align: middle;
}

.curriculum-duration {
  color: var(--muted);
  font-size: 0.82rem;
  white-space: nowrap;
}

.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;
}

.curriculum-progress {
  margin: 18px 0 6px;
}

.curriculum-progress .progress-header {
  display: flex;
  justify-content: space-between;
  font-size: 0.85rem;
  color: var(--muted);
  margin-bottom: 6px;
}

.lesson-toggle-form {
  display: flex;
  flex-shrink: 0;
}

.lesson-check {
  flex-shrink: 0;
  width: 44px;
  height: 44px;
  min-height: 44px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0;
  border: 2px solid var(--border);
  border-radius: 50%;
  background: var(--surface);
  color: var(--muted);
  font-size: 1rem;
  cursor: pointer;
  transition: border-color 0.15s, background 0.15s, color 0.15s;
}

.lesson-check:hover {
  border-color: var(--primary);
  color: var(--primary);
}

.lesson-check:focus-visible {
  outline: 2px solid var(--primary);
  outline-offset: 2px;
}

.lesson-check.done {
  background: #22c55e;
  border-color: #22c55e;
  color: #fff;
}

.curriculum-item.is-done {
  background: #f0fdf4;
  border-color: #bbf7d0;
}

.curriculum-item.is-done .curriculum-icon {
  color: #16a34a;
}

.course-exam {
  padding: 0 0 50px;
}

.course-exam h2 {
  margin: 0 0 14px;
  color: var(--heading);
}

.exam-unlock-card {
  display: flex;
  gap: 18px;
  align-items: flex-start;
  padding: 22px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface);
  box-shadow: var(--shadow-sm);
}

.exam-unlock-icon {
  flex-shrink: 0;
  width: 54px;
  height: 54px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 14px;
  font-size: 1.35rem;
  background: var(--primary-soft);
  color: var(--primary);
}

.exam-unlock-body {
  flex: 1;
  min-width: 0;
}

.exam-unlock-body h3 {
  margin: 0 0 6px;
  font-size: 1.1rem;
  color: var(--heading);
}

.exam-unlock-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 6px 16px;
  margin: 0 0 10px;
  color: var(--muted);
  font-size: 0.85rem;
}

.exam-unlock-meta i {
  margin-right: 5px;
  color: var(--primary);
}

.exam-unlock-status {
  display: flex;
  align-items: center;
  gap: 8px;
  margin: 0 0 12px;
  color: var(--text);
  font-size: 0.92rem;
}

.exam-unlock-track {
  max-width: 420px;
  margin: 0 0 14px;
}

.exam-locked-btn {
  pointer-events: none;
}

.exam-lock-note {
  margin: 8px 0 12px;
  color: var(--muted);
  font-size: 0.85rem;
}

.exam-unlock-card.state-locked {
  border-color: #fcd34d;
  background: #fffbeb;
}

.exam-unlock-card.state-locked .exam-unlock-icon {
  background: #fef3c7;
  color: #b45309;
}

.exam-unlock-card.state-open,
.exam-unlock-card.state-passed {
  border-color: #86efac;
  background: #f0fdf4;
}

.exam-unlock-card.state-open .exam-unlock-icon {
  background: #dcfce7;
  color: #15803d;
}

.exam-unlock-card.state-passed .exam-unlock-icon {
  background: #fef08a;
  color: #a16207;
}

.exam-unlock-card.state-pending .exam-unlock-icon,
.exam-unlock-card.state-guest .exam-unlock-icon {
  background: var(--border);
  color: var(--muted);
}

body.dark-mode .curriculum-item.is-done {
  background: rgba(34, 197, 94, 0.12);
  border-color: rgba(34, 197, 94, 0.35);
}

body.dark-mode .exam-unlock-card.state-locked {
  background: rgba(245, 158, 11, 0.12);
  border-color: rgba(245, 158, 11, 0.45);
}

body.dark-mode .exam-unlock-card.state-open,
body.dark-mode .exam-unlock-card.state-passed {
  background: rgba(34, 197, 94, 0.1);
  border-color: rgba(34, 197, 94, 0.4);
}

@media (max-width: 768px) {
  .curriculum-item {
    gap: 10px;
    padding: 12px 14px;
  }

  .curriculum-title {
    font-size: 0.87rem;
  }

  .exam-unlock-card {
    flex-direction: column;
    padding: 18px;
  }

  .exam-unlock-status {
    flex-wrap: wrap;
  }
}

@media (max-width: 900px) {
  .course-detail-grid {
    grid-template-columns: 1fr;
    gap: 26px;
  }

  .course-detail-image img {
    height: 240px;
  }

  .course-detail-info h1 {
    font-size: 1.5rem;
  }
}

.course-badge {
  display: inline-block;
  padding: 3px 9px;
  border-radius: 999px;
  background: var(--primary-soft);
  color: var(--primary);
  font-size: 0.75rem;
  font-weight: 600;
}

.course-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 10px;
  color: var(--muted);
  font-size: 0.84rem;
}

.course-meta span {
  display: inline-flex;
  align-items: center;
  gap: 5px;
}

.course-price {
  color: var(--heading);
  font-weight: 700;
}

.no-courses-found {
  grid-column: 1 / -1;
  padding: 60px 24px;
  background: var(--surface);
  border: 1px dashed var(--border);
  border-radius: var(--radius);
  text-align: center;
}

.no-courses-found i {
  margin-bottom: 14px;
  color: #cbd5e1;
  font-size: 2.6rem;
}

.no-courses-found h3 {
  margin-bottom: 6px;
}

.no-courses-found p {
  color: var(--muted);
}

.stats-section {
  background:
    radial-gradient(70% 90% at 85% 10%, rgba(124, 58, 237, 0.08), transparent 60%),
    radial-gradient(70% 90% at 10% 90%, rgba(56, 189, 248, 0.08), transparent 60%),
    var(--surface);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

.stat-item {
  text-align: center;
}

.stat-item h3 {
  margin-bottom: 4px;
  color: var(--primary);
  font-size: 2.3rem;
  background: var(--gradient);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.stat-item p {
  margin: 0;
  color: var(--muted);
  font-size: 0.92rem;
}

.testimonials-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.testimonial-card {
  display: flex;
  flex-direction: column;
  padding: 24px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}

.testimonial-card .quote {
  flex: 1;
  color: var(--text);
  font-size: 0.94rem;
  font-style: italic;
}

.testimonial-card .quote::before {
  content: "\201C";
  display: block;
  height: 24px;
  color: var(--primary);
  font-size: 2.4rem;
  font-weight: 700;
  font-style: normal;
  line-height: 1;
}

.author {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-top: 16px;
}

.avatar {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 42px;
  height: 42px;
  border-radius: 50%;
  background: var(--primary-soft);
  color: var(--primary);
  font-size: 1rem;
  font-weight: 700;
}

.author-info {
  display: flex;
  flex-direction: column;
}

.author-info strong {
  color: var(--heading);
  font-size: 0.9rem;
}

.author-info small {
  color: var(--muted);
  font-size: 0.8rem;
}

.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  align-items: center;
}

.about-image img {
  width: 100%;
  border-radius: var(--radius);
  box-shadow: var(--shadow-md);
}

.about-content h1,
.about-text h1 {
  font-size: 1.9rem;
}

.about-text p {
  color: var(--muted);
}

.mission-vision {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
  margin-top: 40px;
}

.mv-card {
  padding: 24px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-left: 3px solid var(--primary);
  border-radius: var(--radius);
}

.mv-card h3 {
  margin-bottom: 8px;
  font-size: 1.05rem;
}

.mv-card p {
  margin: 0;
  color: var(--muted);
  font-size: 0.92rem;
}

.values-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.value-card {
  padding: 24px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  text-align: center;
}

.value-card i {
  margin-bottom: 14px;
  color: var(--primary);
  font-size: 1.6rem;
}

.value-card h3 {
  margin-bottom: 6px;
  font-size: 1rem;
}

.value-card p {
  margin: 0;
  color: var(--muted);
  font-size: 0.88rem;
}

.team-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

.team-card {
  padding: 24px 20px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  text-align: center;
}

.team-avatar {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 72px;
  height: 72px;
  margin: 0 auto 14px;
  border-radius: 50%;
  background: var(--primary-soft);
  color: var(--primary);
  font-size: 1.5rem;
  font-weight: 700;
}

.team-role {
  display: block;
  margin-top: 4px;
  color: var(--primary);
  font-size: 0.8rem;
  font-weight: 600;
}

.why-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.why-item {
  padding: 22px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}

.why-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  margin-bottom: 14px;
  border-radius: var(--radius-sm);
  background: var(--primary-soft);
  color: var(--primary);
  font-size: 1.1rem;
}

.why-item h3 {
  margin-bottom: 6px;
  font-size: 1rem;
}

.why-item p {
  margin: 0;
  color: var(--muted);
  font-size: 0.9rem;
}

.instructors-list,
.team-section {
  padding-top: 40px;
}

.instructor-card {
  display: flex;
  gap: 20px;
  padding: 24px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}

.instructor-avatar {
  display: flex;
  align-items: center;
  justify-content: center;
  flex: 0 0 72px;
  height: 72px;
  border-radius: 50%;
  background: var(--primary-soft);
  color: var(--primary);
  font-size: 1.6rem;
  font-weight: 700;
}

.instructor-info h3 {
  margin-bottom: 4px;
  font-size: 1.05rem;
}

.instructor-info .specialization {
  display: block;
  margin-bottom: 8px;
  color: var(--primary);
  font-size: 0.85rem;
  font-weight: 600;
}

.instructor-info p {
  margin: 0;
  color: var(--muted);
  font-size: 0.9rem;
}

.blog-list {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.blog-list .card {
  overflow: hidden;
}

.blog-list h2 {
  margin-bottom: 8px;
  font-size: 1.3rem;
}

.blog-list .card-content p {
  color: var(--muted);
}

.faq-list {
  max-width: 780px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.faq-item {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  overflow: hidden;
}

.faq-question {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  width: 100%;
  padding: 16px 20px;
  background: none;
  border: none;
  color: var(--heading);
  font-size: 0.98rem;
  font-weight: 600;
  text-align: left;
}

.faq-question i {
  color: var(--muted);
}

.faq-answer {
  padding: 0 20px 18px;
  color: var(--muted);
  font-size: 0.92rem;
}

.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 28px;
}

.contact-info {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.info-item {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  padding: 16px 18px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
}

.info-item i {
  display: flex;
  align-items: center;
  justify-content: center;
  flex: 0 0 38px;
  height: 38px;
  border-radius: var(--radius-sm);
  background: var(--primary-soft);
  color: var(--primary);
}

.info-item h4 {
  margin-bottom: 2px;
  font-size: 0.92rem;
}

.info-item p {
  margin: 0;
  color: var(--muted);
  font-size: 0.88rem;
}

.social-links {
  display: flex;
  gap: 10px;
}

.social-links a {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 38px;
  height: 38px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--surface);
  color: var(--muted);
}

.social-links a:hover {
  background: var(--primary-soft);
  border-color: var(--primary-border);
  color: var(--primary);
}

.legal-content {
  max-width: 780px;
  margin: 0 auto;
}

.legal-content h3 {
  margin-top: 28px;
  font-size: 1.1rem;
}

.legal-content p,
.legal-content li {
  color: var(--muted);
  font-size: 0.95rem;
}

.legal-content ul {
  padding-left: 20px;
  list-style: disc;
  color: var(--muted);
}

input,
select,
textarea {
  width: 100%;
  padding: 10px 14px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  font-size: 0.92rem;
  transition: border-color 0.15s, box-shadow 0.15s;
}

input:focus,
select:focus,
textarea:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.18);
}

input::placeholder,
textarea::placeholder {
  color: #94a3b8;
}

input[type="checkbox"],
input[type="radio"] {
  width: auto;
  height: auto;
}

input.invalid,
select.invalid,
textarea.invalid {
  border-color: var(--danger);
}

.form-group {
  margin-bottom: 1rem;
}

.form-group label {
  display: block;
  margin-bottom: 6px;
  color: var(--heading);
  font-size: 0.88rem;
  font-weight: 600;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.form-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-items: center;
  margin-top: 1.25rem;
}

.form-container {
  max-width: 460px;
  margin: 0 auto;
  padding: 32px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
}

.form-card-header {
  margin-bottom: 24px;
  text-align: center;
}

.form-card-header h1,
.form-card-header h2 {
  margin-bottom: 6px;
  font-size: 1.4rem;
}

.form-card-header p {
  margin: 0;
  color: var(--muted);
  font-size: 0.92rem;
}

.form-card-body {
  margin-top: 0;
}

.login-form .form-group,
.register-form .form-group {
  margin-bottom: 16px;
}

.verify-container,
.check-result-section {
  max-width: 560px;
  margin: 0 auto;
}

.verify-section {
  padding: 56px 0;
}

.verify-icon,
.error-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 72px;
  height: 72px;
  margin: 0 auto 20px;
  border-radius: 50%;
  background: var(--primary-soft);
  color: var(--primary);
  font-size: 1.8rem;
}

.verify-result {
  margin-top: 24px;
}

.result-card {
  margin-bottom: 14px;
  padding: 24px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
}

.result-details {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 14px;
}

.result-item {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.result-item .label {
  color: var(--muted);
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.03em;
  text-transform: uppercase;
}

.result-item .value {
  color: var(--heading);
  font-size: 1rem;
  font-weight: 600;
}

.score-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 4px 14px;
  border-radius: 999px;
  background: var(--primary-soft);
  color: var(--primary);
  font-size: 0.95rem;
  font-weight: 700;
}

.score-badge.pass {
  background: var(--success-soft);
  color: var(--success);
}

.score-badge.fail {
  background: var(--danger-soft);
  color: var(--danger);
}

.grade-badge {
  display: inline-flex;
  align-items: center;
  padding: 3px 10px;
  border-radius: 999px;
  background: var(--success-soft);
  color: var(--success);
  font-size: 0.8rem;
  font-weight: 700;
}

.status {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 3px 10px;
  border-radius: 999px;
  font-size: 0.78rem;
  font-weight: 600;
}

.status.valid {
  background: var(--success-soft);
  color: var(--success);
}

.status.invalid {
  background: var(--danger-soft);
  color: var(--danger);
}

.error-page {
  padding: 80px 24px;
  text-align: center;
}

.error-content {
  max-width: 460px;
  margin: 0 auto;
}

.error-content h1 {
  font-size: 2.4rem;
}

.error-content p {
  color: var(--muted);
}

.error-actions {
  display: flex;
  justify-content: center;
  gap: 12px;
  margin-top: 24px;
}

.pagination {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  justify-content: center;
  align-items: center;
  margin-top: 32px;
}

.pagination a,
.pagination span {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 36px;
  height: 36px;
  padding: 0 10px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text);
  font-size: 0.88rem;
  font-weight: 600;
}

.pagination a:hover {
  background: var(--surface-soft);
  color: var(--heading);
}

.pagination .active {
  background: var(--gradient);
  border-color: transparent;
  color: #fff;
  box-shadow: 0 8px 18px -10px rgba(79, 70, 229, 0.55);
}

.pagination-info {
  color: var(--muted);
  font-size: 0.85rem;
}

.search-modal {
  position: fixed;
  inset: 0;
  z-index: 400;
  display: flex;
  align-items: flex-start;
  justify-content: center;
  padding: 12vh 24px 24px;
  background: rgba(15, 23, 42, 0.55);
  backdrop-filter: blur(4px);
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.2s, visibility 0.2s;
}

.search-modal.active {
  opacity: 1;
  visibility: visible;
}

.dark-mode-toggle {
  position: fixed;
  right: 24px;
  bottom: 24px;
  z-index: 360;
  width: 46px;
  height: 46px;
  display: grid;
  place-items: center;
  border: 1px solid var(--border);
  border-radius: 50%;
  background: var(--surface);
  color: var(--primary);
  font-size: 1.05rem;
  cursor: pointer;
  box-shadow: var(--shadow-lg);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.dark-mode-toggle:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(79, 70, 229, 0.28);
}

.dark-mode-toggle:focus-visible {
  outline: 2px solid var(--primary);
  outline-offset: 2px;
}

.search-container {
  width: 100%;
  max-width: 560px;
  padding: 20px;
  background: var(--surface);
  border-radius: var(--radius);
  box-shadow: var(--shadow-lg);
}

.search-input-wrapper {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 4px 6px 4px 14px;
  background: var(--surface-soft);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
}

.search-input-wrapper i {
  color: var(--muted);
}

.search-input-wrapper input[type="text"] {
  flex: 1;
  padding: 10px 0;
  background: transparent;
  border: none;
  box-shadow: none;
}

.search-input-wrapper input[type="text"]:focus {
  box-shadow: none;
}

.search-close {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 34px;
  height: 34px;
  background: transparent;
  border: none;
  border-radius: var(--radius-sm);
  color: var(--muted);
}

.search-close:hover {
  background: var(--border);
  color: var(--heading);
}

.search-suggestions {
  margin-top: 16px;
}

.search-suggestions h4 {
  margin-bottom: 10px;
  color: var(--muted);
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.search-suggestions a {
  display: block;
  padding: 9px 12px;
  border-radius: var(--radius-sm);
  color: var(--text);
  font-size: 0.92rem;
}

.search-suggestions a:hover {
  background: var(--primary-soft);
  color: var(--primary);
}

.cookie-banner {
  position: fixed;
  left: 50%;
  bottom: 20px;
  z-index: 350;
  display: flex;
  align-items: center;
  gap: 16px;
  max-width: 640px;
  padding: 14px 18px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow-lg);
  transform: translate(-50%, 140%);
  opacity: 0;
  visibility: hidden;
  transition: transform 0.3s, opacity 0.3s, visibility 0.3s;
}

.cookie-banner.visible {
  transform: translate(-50%, 0);
  opacity: 1;
  visibility: visible;
}

.cookie-banner p {
  margin: 0;
  color: var(--muted);
  font-size: 0.85rem;
}

.page-transition {
  position: fixed;
  inset: 0;
  z-index: 450;
  display: grid;
  place-items: center;
  background: rgba(15, 23, 42, 0.45);
  backdrop-filter: blur(2px);
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.2s, visibility 0.2s;
}

.page-transition.active {
  opacity: 1;
  visibility: visible;
}

.spinner {
  width: 36px;
  height: 36px;
  border: 3px solid rgba(255, 255, 255, 0.35);
  border-top-color: #fff;
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

.loading-overlay {
  position: fixed;
  inset: 0;
  z-index: 500;
  display: grid;
  place-content: center;
  justify-items: center;
  gap: 14px;
  background: rgba(15, 23, 42, 0.55);
  backdrop-filter: blur(3px);
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.2s, visibility 0.2s;
}

.loading-overlay.active {
  opacity: 1;
  visibility: visible;
}

.loading-overlay p {
  margin: 0;
  color: #fff;
  font-weight: 600;
  font-size: 0.95rem;
}

.spinner-large {
  width: 44px;
  height: 44px;
  border: 4px solid rgba(255, 255, 255, 0.3);
  border-top-color: var(--primary);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

.pull-indicator {
  position: fixed;
  top: calc(var(--header-h) + 8px);
  left: 50%;
  z-index: 340;
  width: 44px;
  height: 44px;
  display: grid;
  place-items: center;
  border: 1px solid var(--border);
  border-radius: 50%;
  background: var(--surface);
  color: var(--primary);
  box-shadow: var(--shadow-lg);
  transform: translate(-50%, -80px);
  opacity: 0;
  visibility: hidden;
  transition: transform 0.3s, opacity 0.3s, visibility 0.3s;
}

.pull-indicator.visible {
  transform: translate(-50%, 0);
  opacity: 1;
  visibility: visible;
}

.pull-indicator.refreshing i {
  animation: spin 0.7s linear infinite;
}

.footer {
  position: relative;
  background: #0b1120;
  color: #cbd5e1;
  border-top: 1px solid #1e293b;
}

.footer::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--gradient);
}

.footer a {
  color: #94a3b8;
  font-size: 0.9rem;
}

.footer a:hover {
  color: #fff;
}

.footer h4 {
  margin-bottom: 14px;
  color: #fff;
  font-size: 0.95rem;
}

.footer-logo {
  display: block;
  height: 34px;
  width: auto;
  filter: invert(1);
}

.footer-newsletter {
  padding: 32px 0;
  background: #0d1424;
  border-bottom: 1px solid #1e293b;
}

.newsletter-content {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
  max-width: 1180px;
  margin: 0 auto;
  padding: 0 24px;
}

.newsletter-text h3 {
  margin-bottom: 4px;
  color: #fff;
  font-size: 1.15rem;
}

.newsletter-text p {
  margin: 0;
  color: #94a3b8;
  font-size: 0.9rem;
}

.newsletter-input-group {
  display: flex;
  gap: 10px;
}

.newsletter-input-group input {
  width: 260px;
  background: #1e293b;
  border-color: #334155;
  color: #f8fafc;
}

.newsletter-input-group input::placeholder {
  color: #64748b;
}

.footer-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 32px;
  padding: 44px 0 36px;
}

.footer-grid ul {
  display: flex;
  flex-direction: column;
  gap: 9px;
}

.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 20px 0;
  border-top: 1px solid #1e293b;
}

.footer-bottom p {
  margin: 0;
  color: #64748b;
  font-size: 0.85rem;
}

.footer-bottom-links {
  display: flex;
  gap: 18px;
}

.admin-mobile-toggle {
  display: none;
  width: 40px;
  height: 40px;
  padding: 0;
  align-items: center;
  justify-content: center;
  background: transparent;
  border: none;
  border-radius: 10px;
  color: var(--heading);
  font-size: 1.15rem;
  cursor: pointer;
  box-shadow: none;
}

.nav-container > .admin-mobile-toggle {
  margin-left: auto;
}

.admin-mobile-toggle:not(:has(i))::before {
  content: "";
  width: 20px;
  height: 2px;
  background: currentColor;
  border-radius: 2px;
  box-shadow: 0 -6px 0 currentColor, 0 6px 0 currentColor;
}

.admin-mobile-toggle:hover,
.admin-mobile-toggle.active {
  background: rgba(79, 70, 229, 0.1);
  color: var(--primary);
}

.mobile-sidebar,
.admin-sidebar {
  position: fixed;
  top: 0;
  left: 0;
  z-index: 360;
  display: flex;
  flex-direction: column;
  width: 272px;
  height: 100vh;
  background: var(--surface);
  border-right: 1px solid var(--border);
  transform: translateX(-100%);
  transition: transform 0.25s ease;
}

.mobile-sidebar.active,
.admin-sidebar.active {
  transform: translateX(0);
}

.sidebar-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 16px 18px;
  border-bottom: 1px solid var(--border-soft);
}

.sidebar-brand h3 {
  margin: 0;
  font-size: 1rem;
}

.sidebar-brand h3 span {
  color: var(--primary);
}

.sidebar-brand p {
  margin: 0;
  color: var(--muted);
  font-size: 0.75rem;
}

.sidebar-brand img {
  display: block;
  height: 30px;
  width: auto;
  margin-bottom: 4px;
}

body.dark-mode .sidebar-brand img {
  filter: invert(1) hue-rotate(180deg);
}

.admin-sidebar-close {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  background: transparent;
  border: none;
  border-radius: var(--radius-sm);
  color: var(--muted);
}

.admin-sidebar-close:hover {
  background: var(--surface-soft);
  color: var(--heading);
}

@media (min-width: 769px) {
  .admin-sidebar-close {
    display: none;
  }
}

.dashboard-content > h1 {
  margin: 0 0 16px;
  font-size: 1.5em;
  font-weight: 700;
  color: var(--heading);
}

.sidebar-menu {
  display: flex;
  flex-direction: column;
  gap: 2px;
  flex: 1;
  overflow-y: auto;
  padding: 12px;
}

.sidebar-menu li a {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 9px 12px;
  border-radius: var(--radius-sm);
  color: var(--text);
  font-size: 0.9rem;
  font-weight: 500;
  transition: background 0.15s, color 0.15s, transform 0.15s;
}

.sidebar-menu li a:hover {
  background: var(--surface-soft);
  color: var(--heading);
  transform: translateX(2px);
}

.sidebar-menu li a:focus-visible {
  outline: 3px solid rgba(99, 102, 241, 0.35);
  outline-offset: -3px;
}

.sidebar-menu li a.active {
  background: var(--primary-soft);
  color: var(--primary);
  font-weight: 600;
}

.sidebar-menu li a i {
  width: 18px;
  text-align: center;
  color: var(--muted);
}

.sidebar-menu li a.active i {
  color: var(--primary);
}

.sidebar-menu-divider {
  height: 1px;
  margin: 10px 4px;
  background: var(--border-soft);
}

.sidebar-menu-label {
  padding: 12px 12px 6px;
  color: #94a3b8;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.logout-link {
  color: var(--danger) !important;
}

.logout-link:hover {
  background: var(--danger-soft) !important;
}

.admin-sidebar-overlay {
  position: fixed;
  inset: 0;
  z-index: 330;
  background: rgba(15, 23, 42, 0.5);
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.2s, visibility 0.2s;
}

.admin-sidebar-overlay.active {
  opacity: 1;
  visibility: visible;
}

body.dark-mode {
  --bg: #0b1220;
  --surface: #111a2e;
  --surface-soft: #1a2440;
  --border: #26324f;
  --border-soft: #1e2a44;
  --text: #cbd5e1;
  --heading: #f1f5f9;
  --muted: #94a3b8;
  --primary-soft: rgba(99, 102, 241, 0.16);
  --primary-border: rgba(129, 140, 248, 0.4);
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.35);
  --shadow-md: 0 10px 28px -8px rgba(0, 0, 0, 0.5);
  --shadow-lg: 0 24px 56px -16px rgba(0, 0, 0, 0.55);
}

body.dark-mode .header {
  background: rgba(11, 18, 32, 0.72);
  border-bottom: 1px solid rgba(38, 50, 79, 0.7);
}

body.dark-mode .header.scrolled {
  background: rgba(11, 18, 32, 0.9);
}

body.dark-mode .alert-success {
  background: rgba(22, 163, 74, 0.15);
  border-color: rgba(22, 163, 74, 0.4);
  color: #86efac;
}

body.dark-mode .alert-danger {
  background: rgba(220, 38, 38, 0.15);
  border-color: rgba(220, 38, 38, 0.4);
  color: #fca5a5;
}

body.dark-mode .alert-warning {
  background: rgba(245, 158, 11, 0.14);
  border-color: rgba(245, 158, 11, 0.5);
  color: #fcd34d;
}

body.dark-mode .badge-success {
  background: rgba(22, 163, 74, 0.2);
  color: #86efac;
}

body.dark-mode .badge-warning {
  background: rgba(217, 119, 6, 0.2);
  color: #fcd34d;
}

body.dark-mode .badge-danger {
  background: rgba(220, 38, 38, 0.2);
  color: #fca5a5;
}

body.dark-mode .badge-info {
  background: rgba(8, 145, 178, 0.2);
  color: #67e8f9;
}

body.dark-mode .footer,
body.dark-mode .footer-newsletter {
  background: #0b1220;
}

@media (max-width: 1024px) {
  .skills-grid,
  .testimonials-grid,
  .values-grid,
  .why-grid {
    grid-template-columns: repeat(2, 1fr);
  }

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

  .hero-grid {
    gap: 36px;
  }

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

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

.bottom-nav {
  display: none;
}

@media (max-width: 768px) {
  .nav-links,
  .nav-search,
  .nav-actions {
    display: none;
  }

  body:has(.cookie-banner.visible) .dark-mode-toggle {
    display: none;
  }

  .admin-mobile-toggle {
    display: flex;
  }

  .btn {
    min-height: 40px;
  }

  .course-card .course-card-actions .btn {
    min-height: 42px;
    font-size: 0.82rem;
  }

  .course-detail-actions .btn {
    flex: 1 1 46%;
  }

  body {
    padding-bottom: 78px;
  }

  .bottom-nav {
    position: fixed;
    left: 12px;
    right: 12px;
    bottom: calc(10px + env(safe-area-inset-bottom));
    z-index: 280;
    display: flex;
    padding: 6px;
    border: 1px solid var(--border);
    border-radius: 999px;
    background: rgba(255, 255, 255, 0.9);
    -webkit-backdrop-filter: blur(16px);
    backdrop-filter: blur(16px);
    box-shadow: 0 8px 28px rgba(15, 23, 42, 0.18);
  }

  body.dark-mode .bottom-nav {
    background: rgba(15, 23, 42, 0.86);
    border-color: rgba(99, 102, 241, 0.28);
    box-shadow: 0 8px 28px rgba(0, 0, 0, 0.5);
  }

  .bottom-nav-items {
    display: flex;
    align-items: center;
    justify-content: space-around;
    width: 100%;
    margin: 0;
    padding: 0;
    list-style: none;
  }

  .bottom-nav-items li {
    flex: 1;
    min-width: 0;
  }

  .bottom-nav-items a {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 2px;
    min-height: 46px;
    padding: 4px 2px;
    border-radius: 12px;
    color: var(--muted);
    font-size: 0.72rem;
    font-weight: 600;
    -webkit-tap-highlight-color: transparent;
  }

  .bottom-nav-items a i {
    font-size: 1.05rem;
  }

  .bottom-nav-items a.active {
    color: var(--primary);
    background: var(--primary-soft);
  }

  .search-modal {
    z-index: 400;
  }

  .dark-mode-toggle {
    right: 20px;
    bottom: calc(86px + env(safe-area-inset-bottom));
  }

  .hero {
    padding: 44px 0 40px;
  }

  .hero-grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .hero-content h1 {
    font-size: 1.9rem;
  }

  .hero-image {
    order: -1;
  }

  .courses-section .container:has(> .category-sidebar) {
    flex-direction: column;
  }

  .category-sidebar {
    position: static;
    width: 100%;
    flex: none;
  }

  .category-sidebar ul {
    flex-direction: row;
    flex-wrap: nowrap;
    gap: 6px;
    overflow-x: auto;
    padding-bottom: 4px;
    scrollbar-width: thin;
    -webkit-overflow-scrolling: touch;
  }

  .category-sidebar li {
    flex: 0 0 auto;
  }

  .category-sidebar a {
    padding: 6px 12px;
    background: var(--surface-soft);
    font-size: 0.84rem;
    white-space: nowrap;
  }

  .courses-grid,
  .skills-grid,
  .testimonials-grid,
  .values-grid,
  .why-grid,
  .team-grid,
  .stats-grid {
    grid-template-columns: 1fr;
  }

  .about-grid,
  .mission-vision,
  .contact-grid,
  .result-details {
    grid-template-columns: 1fr;
  }

  .newsletter-content {
    flex-direction: column;
    align-items: stretch;
    text-align: center;
  }

  .newsletter-input-group {
    flex-direction: column;
  }

  .newsletter-input-group input {
    width: 100%;
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 24px;
  }

  .footer-bottom {
    flex-direction: column;
    text-align: center;
  }

  .cookie-banner {
    left: 16px;
    right: 16px;
    bottom: 16px;
    flex-direction: column;
    align-items: stretch;
    max-width: none;
    transform: translateY(140%);
  }

  .cookie-banner.visible {
    transform: translateY(0);
  }

  .form-row {
    grid-template-columns: 1fr;
  }

  .form-container {
    padding: 24px 20px;
  }

  .courses-toolbar {
    flex-direction: column;
    align-items: stretch;
  }

  .courses-sort {
    flex-wrap: wrap;
  }

  .courses-search-input {
    width: 100%;
  }

  .courses-search-form {
    flex: 1;
  }

  .page-hero {
    padding: 36px 24px 32px;
  }

  .page-hero h1 {
    font-size: 1.6rem;
  }

  .section-header h2 {
    font-size: 1.45rem;
  }
}

/* ---------------- Lesson viewer ---------------- */
.curriculum-link {
  color: inherit;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  min-height: 32px;
}

.curriculum-link:hover {
  color: var(--primary);
}

.lesson-hero {
  background: linear-gradient(135deg, var(--surface-soft), var(--surface));
  border-bottom: 1px solid var(--border);
  padding: 34px 0 28px;
}

.lesson-breadcrumb {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  font-size: 0.83rem;
  color: var(--muted);
  margin-bottom: 12px;
}

.lesson-breadcrumb a {
  color: var(--muted);
  text-decoration: none;
}

.lesson-breadcrumb a:hover {
  color: var(--primary);
}

.lesson-hero h1 {
  margin: 0 0 12px;
  font-size: clamp(1.35rem, 3vw, 1.9rem);
  color: var(--heading);
}

.lesson-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  font-size: 0.88rem;
  color: var(--muted);
}

.lesson-meta i {
  margin-right: 5px;
}

.lesson-free-tag {
  display: inline-block;
  padding: 2px 10px;
  border-radius: 999px;
  background: var(--primary-soft);
  color: var(--primary);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.lesson-body {
  padding: 28px 0 44px;
}

.lesson-container {
  max-width: 880px;
}

.video-embed {
  position: relative;
  padding-top: 56.25%;
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--border);
  background: #000;
  margin-bottom: 22px;
}

.video-embed iframe {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  border: 0;
}

.lesson-content {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px 26px;
  line-height: 1.7;
  font-size: 0.97rem;
}

.lesson-content h2,
.lesson-content h3 {
  margin: 18px 0 8px;
}

.lesson-content ul,
.lesson-content ol {
  margin: 8px 0;
  padding-left: 22px;
}

.lesson-content p:first-child {
  margin-top: 0;
}

.lesson-content p:last-child {
  margin-bottom: 0;
}

.lesson-content a {
  color: var(--primary);
}

.lesson-empty {
  padding: 26px;
  text-align: center;
  color: var(--muted);
}

.lesson-enroll-cta a {
  font-weight: 700;
}

.lesson-actions {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  margin-top: 26px;
  flex-wrap: wrap;
}

.lesson-nav-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  max-width: 34%;
  padding: 10px 16px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface);
  color: var(--text);
  font-size: 0.86rem;
  font-weight: 600;
  text-decoration: none;
  transition: border-color 0.15s, color 0.15s;
}

.lesson-nav-btn:hover {
  border-color: var(--primary);
  color: var(--primary);
}

.lesson-nav-btn span {
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.lesson-nav-locked {
  color: var(--muted);
}

.lesson-nav-locked i {
  color: var(--warning, #d97706);
}

.lesson-complete-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  width: auto;
  padding: 11px 24px;
}

.lesson-complete-btn.is-done {
  background: #059669;
}

.lesson-course-footer {
  margin-top: 22px;
  text-align: center;
  font-size: 0.9rem;
}

.lesson-course-footer a {
  color: var(--primary);
  text-decoration: none;
  font-weight: 600;
}

/* ---------- Course landing / sales page ---------- */
.landing-trust {
  padding: 14px 0 6px;
}
.landing-trust-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-items: center;
}
.trust-chip {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 8px 14px;
  min-height: 36px;
  font-size: 13px;
  font-weight: 600;
  color: var(--heading);
  min-width: 0;
}
.trust-chip i {
  color: var(--primary);
  font-size: 14px;
}
.landing-outcomes,
.landing-audience,
.landing-related {
  padding: 28px 0;
}
.landing-outcomes h2,
.landing-audience h2,
.landing-related h2 {
  font-family: var(--font-display);
  font-size: clamp(1.5rem, 2.4vw, 1.9rem);
  color: var(--heading);
  margin: 0 0 6px;
}
.landing-lead {
  color: var(--muted);
  margin: 0 0 20px;
  max-width: 720px;
}
.outcomes-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
}
.outcome-item {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  background: var(--surface);
  border: 1px solid var(--border-soft);
  border-radius: var(--radius-sm);
  padding: 14px 16px;
  font-size: 14.5px;
  color: var(--text);
  line-height: 1.5;
}
.outcome-item i {
  color: var(--success);
  font-size: 16px;
  margin-top: 2px;
}
.audience-columns {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1.2fr);
  gap: 28px;
  align-items: start;
  background: var(--surface);
  border: 1px solid var(--border-soft);
  border-radius: var(--radius);
  padding: 26px;
}
.audience-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 12px;
}
.audience-list li {
  display: flex;
  gap: 10px;
  align-items: baseline;
  color: var(--text);
  font-size: 14.5px;
  line-height: 1.5;
}
.audience-list li i {
  color: var(--primary);
  flex: none;
}
.related-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

/* Sticky conversion bar */
.sticky-cta {
  position: fixed;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 60;
  background: var(--surface);
  border-top: 1px solid var(--border);
  box-shadow: 0 -8px 24px -12px rgba(0, 0, 0, 0.25);
  margin: 0;
}
.sticky-cta-inner {
  max-width: 1100px;
  margin: 0 auto;
  padding: 10px 20px 14px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}
.sticky-cta-price {
  display: block;
  font-family: var(--font-display);
  font-size: 20px;
  font-weight: 700;
  color: var(--heading);
}
.sticky-cta-price.is-free {
  color: var(--success);
}
.sticky-cta-label {
  display: block;
  font-size: 12px;
  color: var(--muted);
  margin-top: 2px;
}
.sticky-cta-inner .btn {
  margin: 0;
  white-space: nowrap;
}
body.sticky-cta-pad {
  padding-bottom: 68px;
}

@media (max-width: 900px) {
  .related-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}
@media (max-width: 768px) {
  .outcomes-grid {
    grid-template-columns: 1fr;
  }
  .audience-columns {
    grid-template-columns: 1fr;
    grid-template-rows: auto;
    gap: 16px;
    padding: 20px;
  }
  .related-grid {
    grid-template-columns: 1fr;
  }
  .sticky-cta-inner {
    padding: 10px 14px calc(12px + env(safe-area-inset-bottom, 0px));
  }
  .sticky-cta-label {
    display: none;
  }
  .sticky-cta-price {
    font-size: 17px;
  }
}

/* ---------- A11y polish ---------- */
.skip-link {
  position: absolute;
  left: -999px;
  top: 8px;
  z-index: 200;
  background: var(--primary);
  color: #fff;
  padding: 10px 16px;
  border-radius: 8px;
  font-weight: 600;
  text-decoration: none;
}
.skip-link:focus {
  left: 8px;
}
.footer-brand {
  margin: 0 0 14px;
}
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
    scroll-behavior: auto !important;
  }
}