:root {
  --bg: #f5f7fb;
  --surface: #ffffff;
  --surface-2: #eef2ff;
  --text: #0f172a;
  --muted: #64748b;
  --primary: #4f46e5;
  --primary-dark: #3730a3;
  --secondary: #0ea5e9;
  --success: #16a34a;
  --warning: #f59e0b;
  --danger: #dc2626;
  --border: #e2e8f0;
  --shadow-sm: 0 6px 18px rgba(15, 23, 42, 0.06);
  --shadow-md: 0 14px 30px rgba(15, 23, 42, 0.1);
  --radius-sm: 10px;
  --radius-md: 16px;
  --radius-lg: 24px;
  --container: 1180px;
  --space-1: 0.35rem;
  --space-2: 0.6rem;
  --space-3: 1rem;
  --space-4: 1.4rem;
  --space-5: 2rem;
}

:root[data-theme="dark"] {
  --bg: #0b1220;
  --surface: #0f172a;
  --surface-2: #1e293b;
  --text: #e2e8f0;
  --muted: #94a3b8;
  --border: #253247;
  --shadow-sm: 0 6px 20px rgba(2, 6, 23, 0.5);
  --shadow-md: 0 16px 36px rgba(2, 6, 23, 0.65);
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--text);
  font-family: "Tajawal", "Cairo", "Segoe UI", sans-serif;
  scroll-behavior: smooth;
  line-height: 1.65;
}

a {
  color: inherit;
  text-decoration: none;
}

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

.container {
  width: min(100% - 2rem, var(--container));
  margin-inline: auto;
}

.section {
  padding: clamp(2.3rem, 4vw, 3.5rem) 0;
}

.section-title {
  margin: 0 0 0.8rem;
  font-size: clamp(1.35rem, 2.5vw, 2rem);
  letter-spacing: 0.1px;
}

.section-desc {
  margin: 0;
  color: var(--muted);
}

.topbar {
  position: sticky;
  top: 0;
  z-index: 50;
  backdrop-filter: blur(10px);
  background: rgba(245, 247, 251, 0.85);
  border-bottom: 1px solid var(--border);
}

.nav-wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 74px;
  gap: 1rem;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-weight: 700;
  font-size: 1.1rem;
}

.brand-logo {
  width: 38px;
  height: 38px;
  border-radius: 12px;
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  color: #fff;
  display: grid;
  place-items: center;
  font-weight: 800;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 0.6rem;
}

.nav-link {
  padding: 0.65rem 0.9rem;
  border-radius: 999px;
  color: var(--muted);
  font-weight: 600;
  transition: all 0.25s ease;
}

.nav-link:hover,
.nav-link.active {
  background: var(--surface);
  color: var(--primary);
  box-shadow: var(--shadow-sm);
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 0.6rem;
}

.btn {
  border: 0;
  cursor: pointer;
  font: inherit;
  border-radius: 13px;
  padding: 0.72rem 1rem;
  font-weight: 700;
  transition: transform 0.22s ease, box-shadow 0.22s ease, background 0.22s ease, border-color 0.22s ease;
}

.btn:hover {
  transform: translateY(-2px);
}

.btn-primary {
  color: #fff;
  background: linear-gradient(130deg, var(--primary), var(--secondary));
  box-shadow: var(--shadow-sm);
}

.btn-primary:hover {
  box-shadow: var(--shadow-md);
}

.btn-outline {
  background: #fff;
  color: var(--text);
  border: 1px solid var(--border);
}

.btn-secondary {
  color: #fff;
  background: linear-gradient(130deg, #0f766e, #06b6d4);
  box-shadow: var(--shadow-sm);
}

.btn-ghost {
  background: transparent;
  color: var(--text);
  border: 1px solid var(--border);
}

.btn-danger {
  color: #fff;
  background: linear-gradient(120deg, #dc2626, #ef4444);
}

.btn-sm {
  padding: 0.45rem 0.7rem;
  border-radius: 10px;
  font-size: 0.9rem;
}

.btn:disabled {
  opacity: 0.55;
  cursor: not-allowed;
  transform: none;
}

.mobile-toggle {
  display: none;
  background: transparent;
  border: 0;
  font-size: 1.6rem;
  cursor: pointer;
}

.hero {
  padding: 4.2rem 0 3.2rem;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  align-items: center;
  gap: 2rem;
}

.hero h1 {
  margin: 0 0 1rem;
  font-size: clamp(1.8rem, 4vw, 3rem);
  line-height: 1.4;
}

.hero p {
  margin: 0 0 1.4rem;
  color: var(--muted);
  font-size: 1.05rem;
}

.chips {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: 1rem;
}

.chip {
  padding: 0.45rem 0.8rem;
  border-radius: 999px;
  background: var(--surface-2);
  color: var(--primary-dark);
  font-size: 0.9rem;
  font-weight: 600;
  border: 0;
}

.grid {
  display: grid;
  gap: 1.1rem;
}

.grid-3 {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.grid-2 {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 1.05rem;
  box-shadow: var(--shadow-sm);
  transition: transform 0.26s ease, box-shadow 0.26s ease, border-color 0.26s ease;
}

.card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
  border-color: rgba(79, 70, 229, 0.3);
}

.card h3,
.card h4 {
  margin: 0.5rem 0;
}

.card p {
  margin: 0;
  color: var(--muted);
  line-height: 1.7;
}

.kpi {
  font-size: 1.6rem;
  font-weight: 800;
  color: var(--primary);
}

.badge {
  display: inline-block;
  padding: 0.35rem 0.65rem;
  border-radius: 999px;
  font-size: 0.78rem;
  background: #eef2ff;
  color: var(--primary-dark);
}

.form-card {
  max-width: 520px;
  margin-inline: auto;
}

.field {
  margin-bottom: 0.9rem;
}

label {
  display: inline-block;
  margin-bottom: 0.4rem;
  font-weight: 600;
}

input,
select,
textarea {
  width: 100%;
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 0.72rem 0.8rem;
  font: inherit;
  background: var(--surface);
}

input:focus,
select:focus,
textarea:focus {
  outline: 2px solid rgba(79, 70, 229, 0.2);
  border-color: var(--primary);
}

.progress {
  height: 8px;
  border-radius: 999px;
  background: #e2e8f0;
  overflow: hidden;
}

.progress > span {
  display: block;
  height: 100%;
  background: linear-gradient(130deg, var(--primary), var(--secondary));
}

.table-wrap {
  overflow: auto;
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
}

table {
  width: 100%;
  border-collapse: collapse;
}

th,
td {
  padding: 0.85rem;
  border-bottom: 1px solid var(--border);
  text-align: right;
}

.site-footer {
  margin-top: 2.5rem;
  padding: 2.4rem 0;
  background: #0f172a;
  color: #dbeafe;
}

.footer-grid {
  display: grid;
  gap: 1rem;
  grid-template-columns: 1.2fr repeat(3, 1fr);
}

.footer-title {
  font-weight: 700;
  margin: 0 0 0.7rem;
}

.footer-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.4rem;
}

.subtle {
  color: var(--muted);
}

.mt-0 {
  margin-top: 0;
}

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

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  border: 0;
}

.grid-4 {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.section-soft {
  background: linear-gradient(180deg, rgba(79, 70, 229, 0.04), rgba(14, 165, 233, 0.04));
}

.home-hero {
  background: radial-gradient(circle at 20% 20%, rgba(79, 70, 229, 0.14), transparent 45%);
}

.hero-cta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  margin-bottom: 1rem;
}

.search-bar {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 0.8rem;
  box-shadow: var(--shadow-sm);
}

.search-label {
  margin-bottom: 0.6rem;
}

.search-row {
  display: flex;
  align-items: center;
  gap: 0.6rem;
}

.search-row input {
  margin: 0;
}

.hero-panel {
  border: 1px solid rgba(79, 70, 229, 0.2);
}

.stats-grid .stat-card {
  text-align: center;
}

.course-card {
  overflow: hidden;
  padding: 0;
}

.course-card img {
  width: 100%;
  height: 170px;
  object-fit: cover;
  border-bottom: 1px solid var(--border);
}

.course-body {
  padding: 1rem;
}

.course-body h3 {
  margin: 0.5rem 0;
  line-height: 1.5;
}

.course-meta,
.course-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.8rem;
}

.course-meta {
  margin: 0.7rem 0;
  color: #334155;
  font-weight: 600;
}

.course-footer {
  border-top: 1px dashed var(--border);
  padding-top: 0.7rem;
}

.course-footer strong {
  color: var(--primary-dark);
}

.feature-card {
  border-top: 3px solid rgba(79, 70, 229, 0.4);
}

.path-card .progress {
  margin-top: 0.8rem;
}

.instructor-card,
.testimonial-card,
.pricing-card,
.faq-item,
.final-cta {
  transition: transform 0.25s ease, box-shadow 0.25s ease, border-color 0.25s ease;
}

.instructor-card:hover,
.testimonial-card:hover,
.pricing-card:hover,
.faq-item:hover,
.final-cta:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
}

.testimonial-card p {
  font-size: 1rem;
  color: #334155;
}

.testimonial-card h4 {
  margin-bottom: 0.2rem;
}

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

.pricing-card-featured {
  border-color: rgba(79, 70, 229, 0.45);
  background: linear-gradient(180deg, #ffffff, #eef2ff);
}

.faq-list {
  display: grid;
  gap: 0.8rem;
}

.faq-item {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 0.8rem 1rem;
  box-shadow: var(--shadow-sm);
}

.faq-item summary {
  cursor: pointer;
  font-weight: 700;
  color: #1e293b;
}

.faq-item p {
  margin: 0.7rem 0 0;
  color: var(--muted);
}

.final-cta {
  border: 1px solid rgba(79, 70, 229, 0.32);
  background: linear-gradient(135deg, rgba(79, 70, 229, 0.1), rgba(14, 165, 233, 0.1));
}

.cta-center {
  justify-content: center;
}

.pt-0 {
  padding-top: 0;
}

.full-btn {
  width: 100%;
  text-align: center;
  display: inline-block;
}

.catalog-hero {
  background: radial-gradient(circle at 75% 20%, rgba(14, 165, 233, 0.12), transparent 42%);
}

.catalog-search {
  margin-top: 1rem;
  max-width: 760px;
}

.catalog-layout {
  display: grid;
  grid-template-columns: 290px 1fr;
  gap: 1rem;
  align-items: start;
}

.filters-panel {
  position: sticky;
  top: 94px;
}

.active-filter {
  background: var(--primary);
  color: #fff;
}

.catalog-head {
  margin-bottom: 0.9rem;
}

.catalog-grid .course-card {
  min-height: 100%;
}

.price-tag {
  font-weight: 800;
  color: var(--primary-dark);
}

.pagination {
  margin-top: 1rem;
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.page-btn {
  border: 1px solid var(--border);
  background: #fff;
  padding: 0.5rem 0.85rem;
  border-radius: 10px;
  font-weight: 700;
  color: #334155;
  transition: all 0.25s ease;
}

.page-btn:hover,
.page-btn.active {
  color: #fff;
  background: var(--primary);
  border-color: var(--primary);
}

.details-hero {
  background: radial-gradient(circle at 20% 20%, rgba(79, 70, 229, 0.12), transparent 44%);
}

.details-layout {
  display: grid;
  grid-template-columns: 1.1fr 0.72fr;
  gap: 1rem;
  align-items: start;
}

.preview-box {
  margin-top: 1rem;
  padding: 0;
  overflow: hidden;
}

.video-placeholder {
  min-height: 280px;
  display: grid;
  place-items: center;
  background: linear-gradient(130deg, #1e293b, #334155);
  color: #dbeafe;
  font-weight: 700;
}

.enroll-card {
  border-color: rgba(79, 70, 229, 0.25);
}

.sticky-aside {
  position: sticky;
  top: 94px;
}

.price-main {
  margin: 0.3rem 0 0.8rem;
  font-size: 2rem;
  font-weight: 800;
  color: var(--primary-dark);
}

.offer-list {
  list-style: none;
  padding: 0;
  margin: 0.9rem 0;
  display: grid;
  gap: 0.45rem;
  color: #334155;
}

.offer-list li::before {
  content: "\2713 ";
  color: var(--success);
  font-weight: 700;
}

.guarantee {
  color: var(--success);
  font-weight: 700;
}

.details-content-layout {
  display: grid;
  grid-template-columns: 1fr 280px;
  gap: 1rem;
  align-items: start;
}

.details-main {
  display: grid;
  gap: 1rem;
}

.learn-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.7rem;
}

.learn-grid p {
  margin: 0;
  padding: 0.7rem;
  background: #f8fafc;
  border: 1px solid var(--border);
  border-radius: 12px;
}

.proof-card p {
  margin: 0.2rem 0 0.6rem;
}

.dashboard-page {
  background: #eef2f9;
}

.dashboard-shell {
  display: grid;
  grid-template-columns: 270px 1fr;
  min-height: 100vh;
}

.dashboard-sidebar {
  background: #0f172a;
  color: #cbd5e1;
  padding: 1rem;
  position: sticky;
  top: 0;
  height: 100vh;
  border-left: 1px solid rgba(148, 163, 184, 0.2);
}

.sidebar-brand {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  margin-bottom: 1rem;
  font-weight: 800;
  color: #fff;
}

.sidebar-brand .brand-logo {
  width: 32px;
  height: 32px;
}

.sidebar-title {
  margin: 1rem 0 0.5rem;
  color: #94a3b8;
  font-size: 0.82rem;
}

.sidebar-nav {
  display: grid;
  gap: 0.35rem;
}

.sidebar-link {
  padding: 0.6rem 0.7rem;
  border-radius: 10px;
  color: #cbd5e1;
  font-weight: 600;
  transition: all 0.22s ease;
}

.sidebar-link:hover,
.sidebar-link.active {
  background: rgba(79, 70, 229, 0.24);
  color: #fff;
}

.dashboard-main {
  display: grid;
  grid-template-rows: auto 1fr;
}

.dashboard-topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.8rem;
  padding: 0.9rem 1rem;
  border-bottom: 1px solid var(--border);
  background: rgba(255, 255, 255, 0.9);
  backdrop-filter: blur(8px);
  position: sticky;
  top: 0;
  z-index: 30;
}

.dashboard-content {
  padding: 1rem;
  display: grid;
  gap: 1rem;
}

.sidebar-toggle {
  border: 1px solid var(--border);
  background: #fff;
  border-radius: 10px;
  padding: 0.4rem 0.7rem;
  cursor: pointer;
  display: none;
}

.topbar-search {
  max-width: 360px;
  width: 100%;
}

.topbar-actions {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.welcome-card {
  background: linear-gradient(135deg, rgba(79, 70, 229, 0.14), rgba(14, 165, 233, 0.16));
  border: 1px solid rgba(79, 70, 229, 0.2);
}

.widget-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 0.9rem;
}

.widget-card {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 0.9rem;
  box-shadow: var(--shadow-sm);
}

.dashboard-split {
  display: grid;
  grid-template-columns: 1.25fr 0.75fr;
  gap: 1rem;
}

.list-clean {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.6rem;
}

.list-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.6rem;
  padding: 0.7rem;
  border: 1px solid var(--border);
  border-radius: 12px;
  background: #fff;
}

.tab-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.tab-btn {
  border: 1px solid var(--border);
  background: #fff;
  border-radius: 999px;
  padding: 0.42rem 0.8rem;
  font-weight: 700;
  color: #334155;
  cursor: pointer;
}

.tab-btn.active {
  color: #fff;
  border-color: var(--primary);
  background: var(--primary);
}

.courses-progress-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
}

.course-progress-card .progress {
  margin: 0.7rem 0;
}

.profile-layout {
  display: grid;
  grid-template-columns: 320px 1fr;
  gap: 1rem;
}

.avatar-box {
  width: 86px;
  height: 86px;
  border-radius: 50%;
  background: linear-gradient(130deg, var(--primary), var(--secondary));
  color: #fff;
  display: grid;
  place-items: center;
  font-size: 1.6rem;
  font-weight: 800;
  margin-bottom: 0.8rem;
}

.setting-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.6rem;
  padding: 0.65rem 0;
  border-bottom: 1px dashed var(--border);
}

.setting-item:last-child {
  border-bottom: 0;
}

.toggle {
  width: 44px;
  height: 24px;
  border-radius: 999px;
  background: #cbd5e1;
  position: relative;
}

.toggle::after {
  content: "";
  position: absolute;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: #fff;
  right: 3px;
  top: 3px;
}

.toggle.on {
  background: var(--primary);
}

.toggle.on::after {
  right: 23px;
}

.certificate-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1rem;
}

.certificate-card {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 1rem;
  box-shadow: var(--shadow-sm);
}

.certificate-actions {
  display: flex;
  gap: 0.5rem;
  margin-top: 0.8rem;
}

.dashboard-overlay {
  display: none;
}

.theme-toggle {
  min-width: 44px;
  padding-inline: 0.65rem;
}

.reveal {
  opacity: 0;
  transform: translateY(18px) scale(0.99);
  transition: opacity 0.45s ease, transform 0.45s ease;
}

.reveal.in-view {
  opacity: 1;
  transform: translateY(0) scale(1);
}

.alert {
  border-radius: 12px;
  padding: 0.8rem 0.9rem;
  border: 1px solid;
  font-weight: 600;
}

.alert-success {
  background: #ecfdf3;
  border-color: #86efac;
  color: #166534;
}

.alert-error {
  background: #fef2f2;
  border-color: #fecaca;
  color: #991b1b;
}

.empty-state {
  text-align: center;
  border: 1px dashed var(--border);
  border-radius: var(--radius-md);
  padding: 1.2rem;
  background: color-mix(in srgb, var(--surface) 88%, transparent);
}

.empty-state h3 {
  margin: 0 0 0.4rem;
}

.skeleton-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1rem;
}

.skeleton-card {
  border-radius: var(--radius-md);
  border: 1px solid var(--border);
  background: var(--surface);
  overflow: hidden;
}

.skeleton-shimmer {
  position: relative;
  background: #e2e8f0;
  overflow: hidden;
}

.skeleton-shimmer::after {
  content: "";
  position: absolute;
  inset: 0;
  transform: translateX(-100%);
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.55), transparent);
  animation: shimmer 1.2s infinite;
}

.skeleton-media {
  height: 168px;
}

.skeleton-line {
  height: 14px;
  border-radius: 8px;
  margin: 0.7rem;
}

.skeleton-line.short {
  width: 55%;
}

.form-stack {
  display: grid;
  gap: 0.75rem;
}

.field-help {
  margin-top: 0.25rem;
  font-size: 0.86rem;
  color: var(--muted);
}

@keyframes shimmer {
  100% {
    transform: translateX(100%);
  }
}

.lesson-player-page.dark-learning-mode {
  background: linear-gradient(180deg, #0b1220, #111827);
  color: #e2e8f0;
}

.lesson-player-page .topbar {
  background: rgba(11, 18, 32, 0.86);
  border-bottom-color: rgba(148, 163, 184, 0.2);
}

.lesson-wrapper {
  padding-top: 2rem;
}

.lesson-grid {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 1rem;
  align-items: start;
}

.lesson-video-card,
.lesson-player-page .card {
  background: #111827;
  border: 1px solid rgba(148, 163, 184, 0.22);
  border-radius: var(--radius-md);
  padding: 1rem;
  box-shadow: var(--shadow-sm);
}

.lesson-player-page .section-title,
.lesson-player-page h1,
.lesson-player-page h2,
.lesson-player-page h3,
.lesson-title {
  color: #f8fafc;
}

.lesson-player-page .section-desc,
.lesson-player-page .subtle,
.lesson-player-page .card p,
.lesson-time {
  color: #94a3b8;
}

.lesson-video-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.6rem;
}

.video-stage {
  margin: 0.7rem 0;
  min-height: 320px;
  border-radius: var(--radius-md);
  border: 1px solid rgba(148, 163, 184, 0.25);
  background: linear-gradient(130deg, #0f172a, #1f2937);
  display: grid;
  place-items: center;
  color: #cbd5e1;
  font-weight: 700;
}

.lesson-nav-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
}

.lesson-progress-card {
  margin-top: 1rem;
}

.lesson-progress-head {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.lesson-filters {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 0.8rem;
}

.lesson-filters .chip {
  border: 0;
  cursor: pointer;
}

.attachment-list a {
  color: #93c5fd;
  font-weight: 700;
}

.lesson-sidebar-card {
  position: sticky;
  top: 88px;
}

.accordion-list {
  display: grid;
  gap: 0.6rem;
  margin-bottom: 1rem;
}

.accordion-item {
  border: 1px solid rgba(148, 163, 184, 0.2);
  border-radius: 12px;
  overflow: hidden;
}

.accordion-trigger {
  width: 100%;
  text-align: right;
  border: 0;
  background: rgba(30, 41, 59, 0.7);
  color: #e2e8f0;
  padding: 0.75rem;
  cursor: pointer;
  font: inherit;
  font-weight: 700;
}

.accordion-panel {
  display: none;
  padding: 0.5rem 0.75rem 0.75rem;
  background: rgba(15, 23, 42, 0.5);
}

.accordion-item.open .accordion-panel {
  display: grid;
  gap: 0.45rem;
}

.lesson-link {
  color: #cbd5e1;
  padding: 0.5rem;
  border-radius: 8px;
}

.lesson-link.active,
.lesson-link:hover {
  background: rgba(79, 70, 229, 0.22);
  color: #fff;
}

.quiz-page {
  background: linear-gradient(180deg, #f1f5f9, #eef2ff);
}

.quiz-layout {
  max-width: 820px;
  display: grid;
  gap: 1rem;
}

.quiz-intro,
.quiz-question-card,
.quiz-result-card {
  border: 1px solid rgba(79, 70, 229, 0.18);
}

.quiz-head-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 0.6rem;
}

.quiz-timer {
  margin: 0;
  padding: 0.35rem 0.6rem;
  border-radius: 999px;
  background: #fee2e2;
  color: #991b1b;
  font-weight: 700;
}

.quiz-answers {
  display: grid;
  gap: 0.7rem;
  margin: 0.6rem 0;
}

.quiz-answer {
  border: 1px solid var(--border);
  background: #fff;
  border-radius: 12px;
  padding: 0.75rem;
  cursor: pointer;
  text-align: right;
  font: inherit;
  transition: all 0.2s ease;
}

.quiz-answer:hover,
.quiz-answer.selected {
  border-color: var(--primary);
  box-shadow: 0 0 0 2px rgba(79, 70, 229, 0.15);
  background: #f8faff;
}

.quiz-actions {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.6rem;
}

.quiz-score {
  font-size: 2rem;
  font-weight: 800;
  color: var(--primary-dark);
}

:root[data-theme="dark"] .topbar,
:root[data-theme="dark"] .dashboard-topbar {
  background: rgba(11, 18, 32, 0.9);
  border-color: var(--border);
}

:root[data-theme="dark"] .btn-outline,
:root[data-theme="dark"] .btn-ghost,
:root[data-theme="dark"] .page-btn,
:root[data-theme="dark"] .tab-btn,
:root[data-theme="dark"] .quiz-answer {
  background: #0b1220;
  color: var(--text);
  border-color: var(--border);
}

:root[data-theme="dark"] .site-footer {
  background: #020617;
}

:root[data-theme="dark"] .video-stage,
:root[data-theme="dark"] .lesson-video-card,
:root[data-theme="dark"] .lesson-player-page .card,
:root[data-theme="dark"] .dashboard-sidebar {
  border-color: var(--border);
}

:root[data-theme="dark"] .skeleton-shimmer {
  background: #334155;
}

:root[data-theme="dark"] .alert-success {
  background: rgba(22, 101, 52, 0.22);
  color: #bbf7d0;
  border-color: rgba(34, 197, 94, 0.45);
}

:root[data-theme="dark"] .alert-error {
  background: rgba(153, 27, 27, 0.22);
  color: #fecaca;
  border-color: rgba(239, 68, 68, 0.45);
}

@media (max-width: 980px) {
  .hero-grid,
  .grid-3,
  .grid-2,
  .grid-4,
  .footer-grid {
    grid-template-columns: 1fr;
  }

  .nav-links {
    position: fixed;
    inset: 74px 0 auto 0;
    background: var(--surface);
    border-bottom: 1px solid var(--border);
    display: grid;
    gap: 0.2rem;
    padding: 0.8rem 1rem;
    transform: translateY(-140%);
    transition: transform 0.3s ease;
  }

  .nav-links.open {
    transform: translateY(0);
  }

  .mobile-toggle {
    display: inline-block;
  }

  .nav-actions .btn-outline {
    display: none;
  }

  .search-row {
    flex-direction: column;
    align-items: stretch;
  }

  .catalog-layout,
  .details-layout,
  .details-content-layout,
  .learn-grid,
  .lesson-grid,
  .widget-grid,
  .dashboard-split,
  .courses-progress-grid,
  .profile-layout,
  .certificate-grid,
  .dashboard-shell {
    grid-template-columns: 1fr;
  }

  .skeleton-grid {
    grid-template-columns: 1fr;
  }

  .filters-panel,
  .sticky-aside {
    position: static;
  }

  .dashboard-sidebar {
    position: fixed;
    top: 0;
    bottom: 0;
    right: 0;
    width: min(84vw, 280px);
    transform: translateX(110%);
    transition: transform 0.25s ease;
    z-index: 80;
  }

  body.dashboard-sidebar-open .dashboard-sidebar {
    transform: translateX(0);
  }

  .dashboard-overlay {
    position: fixed;
    inset: 0;
    background: rgba(15, 23, 42, 0.35);
    z-index: 70;
  }

  body.dashboard-sidebar-open .dashboard-overlay {
    display: block;
  }

  .sidebar-toggle {
    display: inline-block;
  }

  .hero-cta .btn {
    width: 100%;
    text-align: center;
  }

  .nav-wrap {
    min-height: 66px;
  }

  .quiz-actions {
    flex-direction: column;
    align-items: stretch;
  }
}