/* Courses catalog — modern responsive layout */

.courses-page {
  background:
    radial-gradient(ellipse 70% 45% at 100% 0%, rgba(15, 118, 110, 0.07), transparent 55%),
    radial-gradient(ellipse 55% 40% at 0% 100%, rgba(212, 168, 83, 0.06), transparent 50%),
    var(--bg);
}

/* ─── Hero ─── */
.courses-hero {
  position: relative;
  overflow: hidden;
  padding: clamp(var(--space-10), 8vw, var(--space-16)) 0 clamp(var(--space-8), 5vw, var(--space-12));
}

.courses-hero-bg {
  position: absolute;
  inset: 0;
  pointer-events: none;
}

.courses-hero-orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(72px);
  opacity: 0.5;
}

.courses-hero-orb--1 {
  width: min(420px, 70vw);
  height: min(420px, 70vw);
  top: -140px;
  inset-inline-end: -100px;
  background: radial-gradient(circle, var(--teal-400), transparent 70%);
}

.courses-hero-orb--2 {
  width: min(320px, 55vw);
  height: min(320px, 55vw);
  bottom: -80px;
  inset-inline-start: -60px;
  background: radial-gradient(circle, var(--gold-400), transparent 70%);
}

.courses-hero-grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(15, 118, 110, 0.035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(15, 118, 110, 0.035) 1px, transparent 1px);
  background-size: 48px 48px;
  mask-image: radial-gradient(ellipse 85% 75% at 50% 20%, #000 15%, transparent 100%);
}

.courses-hero-inner {
  position: relative;
  z-index: 1;
  max-width: 760px;
}

.courses-eyebrow {
  margin: 0 0 var(--space-3);
  font-size: var(--text-xs);
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--primary);
}

.courses-hero h1 {
  margin: 0;
  font-size: clamp(1.85rem, 4.5vw, 2.75rem);
  font-weight: 800;
  letter-spacing: -0.035em;
  line-height: 1.12;
  color: var(--navy-900);
}

.courses-lead {
  margin: var(--space-4) 0 0;
  font-size: clamp(var(--text-base), 2vw, var(--text-lg));
  line-height: var(--leading-relaxed);
  color: var(--text-secondary);
  max-width: 38rem;
}

.courses-hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
  margin-top: var(--space-6);
}

.courses-stats {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: var(--space-3);
  margin: var(--space-8) 0 0;
  padding: 0;
  max-width: 520px;
}

.courses-stat {
  padding: var(--space-4);
  border-radius: var(--radius-lg);
  background: rgba(255, 255, 255, 0.72);
  border: 1px solid rgba(255, 255, 255, 0.9);
  box-shadow: var(--shadow-sm);
  backdrop-filter: blur(8px);
}

.courses-stat dt {
  margin: 0;
  font-size: var(--text-xs);
  font-weight: 600;
  color: var(--text-muted);
}

.courses-stat dd {
  margin: var(--space-1) 0 0;
  font-size: var(--text-2xl);
  font-weight: 800;
  letter-spacing: -0.03em;
  color: var(--navy-900);
  line-height: 1;
}

/* ─── Spotlight ─── */
.courses-spotlight {
  padding: 0 0 var(--space-6);
}

.courses-spotlight-card {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
  gap: 0;
  border-radius: var(--radius-xl);
  overflow: hidden;
  background: var(--surface);
  border: 1px solid var(--border);
  box-shadow: var(--shadow-lg);
}

.courses-spotlight-media {
  display: block;
  min-height: 280px;
  text-decoration: none;
}

.courses-spotlight-body {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: var(--space-3);
  padding: clamp(var(--space-6), 4vw, var(--space-8));
  background: linear-gradient(165deg, var(--navy-900) 0%, var(--teal-700) 100%);
  color: #f8fafc;
}

.courses-spotlight-badge {
  display: inline-flex;
  width: fit-content;
  padding: 0.3rem 0.75rem;
  border-radius: var(--radius-full);
  font-size: var(--text-xs);
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  background: rgba(212, 168, 83, 0.22);
  color: var(--gold-400);
}

.courses-spotlight-body h2 {
  margin: 0;
  font-size: clamp(var(--text-xl), 3vw, var(--text-2xl));
  font-weight: 800;
  letter-spacing: -0.02em;
  line-height: 1.2;
}

.courses-spotlight-body h2 a {
  color: inherit;
  text-decoration: none;
  transition: opacity var(--transition);
}

.courses-spotlight-body h2 a:hover {
  opacity: 0.88;
}

.courses-spotlight-body p {
  margin: 0;
  max-width: 42rem;
  font-size: var(--text-sm);
  line-height: var(--leading-relaxed);
  color: rgba(248, 250, 252, 0.82);
}

.courses-spotlight-meta {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-4);
  margin: 0;
  padding: 0;
  list-style: none;
  font-size: var(--text-sm);
  color: rgba(248, 250, 252, 0.75);
}

.courses-spotlight-meta li {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
}

.courses-spotlight-actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
  margin-top: var(--space-2);
}

.courses-spotlight-actions .btn-primary {
  background: #fff;
  color: var(--navy-900);
  border-color: #fff;
}

.courses-spotlight-actions .btn-primary:hover {
  background: var(--teal-50);
}

.courses-spotlight-actions .btn-ghost {
  color: #fff;
  border-color: rgba(255, 255, 255, 0.35);
}

.courses-spotlight-actions .btn-ghost:hover {
  background: rgba(255, 255, 255, 0.1);
}

/* ─── Category filter ─── */
.courses-filter {
  position: sticky;
  top: calc(var(--header-shell-h) - 1px);
  z-index: 20;
  padding: var(--space-3) 0;
  background: rgba(248, 250, 252, 0.88);
  border-block: 1px solid var(--border);
  backdrop-filter: blur(12px);
}

.courses-filter-inner {
  display: flex;
  gap: var(--space-2);
  overflow-x: auto;
  scrollbar-width: none;
  -webkit-overflow-scrolling: touch;
  padding-block: var(--space-1);
}

.courses-filter-inner::-webkit-scrollbar { display: none; }

.courses-filter-pill {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  flex-shrink: 0;
  padding: 0.55rem 1rem;
  border-radius: var(--radius-full);
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--text-secondary);
  background: var(--surface);
  border: 1px solid var(--border);
  text-decoration: none;
  transition: color var(--transition), background var(--transition), border-color var(--transition), box-shadow var(--transition);
}

.courses-filter-pill:hover {
  color: var(--primary);
  border-color: rgba(15, 118, 110, 0.25);
}

.courses-filter-pill.is-active {
  color: #fff;
  background: var(--primary);
  border-color: var(--primary);
  box-shadow: 0 4px 14px var(--primary-glow);
}

.courses-filter-count {
  display: inline-grid;
  place-items: center;
  min-width: 1.35rem;
  height: 1.35rem;
  padding: 0 0.35rem;
  border-radius: var(--radius-full);
  font-size: 0.65rem;
  font-weight: 800;
  background: rgba(15, 118, 110, 0.1);
  color: var(--primary);
}

.courses-filter-pill.is-active .courses-filter-count {
  background: rgba(255, 255, 255, 0.22);
  color: #fff;
}

/* ─── Catalog ─── */
.courses-catalog {
  padding: var(--space-6) 0 var(--space-10);
}

.courses-group + .courses-group {
  margin-top: clamp(var(--space-10), 6vw, var(--space-14));
  padding-top: clamp(var(--space-8), 5vw, var(--space-10));
  border-top: 1px solid var(--border);
}

.courses-group-head {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: var(--space-4);
  margin-bottom: var(--space-6);
  flex-wrap: wrap;
}

.courses-group-eyebrow {
  margin: 0 0 var(--space-1);
  font-size: 0.65rem;
  font-weight: 800;
  letter-spacing: 0.16em;
  color: var(--text-muted);
}

.courses-group-head h2 {
  margin: 0;
  font-size: clamp(var(--text-xl), 3vw, var(--text-2xl));
  font-weight: 800;
  letter-spacing: -0.025em;
  color: var(--navy-900);
}

.courses-group-count {
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--text-muted);
  padding: 0.4rem 0.85rem;
  border-radius: var(--radius-full);
  background: var(--surface);
  border: 1px solid var(--border);
}

.courses-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(min(100%, 320px), 1fr));
  gap: var(--space-6);
}

/* ─── Catalog mosaic (dense grid) ─── */
.courses-mosaic {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(min(100%, 220px), 1fr));
  gap: 0.875rem;
  align-items: stretch;
}

@media (min-width: 640px) {
  .courses-mosaic {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 1rem;
  }
}

@media (min-width: 900px) {
  .courses-mosaic {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 1.125rem;
  }
}

@media (min-width: 1180px) {
  .courses-mosaic {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

.course-card.is-filtered-out {
  display: none;
}

.course-cover--catalog {
  aspect-ratio: 16 / 9;
}

.course-card--catalog {
  border-radius: var(--radius-lg);
  box-shadow: 0 1px 3px rgba(15, 23, 42, 0.06);
}

.course-card--catalog:hover {
  transform: translateY(-4px);
  box-shadow: 0 14px 32px rgba(15, 118, 110, 0.14);
}

.course-card--catalog .course-card-body {
  gap: var(--space-2);
  padding: var(--space-4);
}

.course-card-cat {
  font-size: 0.62rem;
  font-weight: 800;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--primary);
  padding: 0.2rem 0.5rem;
  border-radius: var(--radius-sm);
  background: var(--primary-light);
  max-width: 100%;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.course-card--catalog .course-card-title {
  font-size: var(--text-base);
  line-height: 1.3;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.course-card--catalog .course-card-summary {
  font-size: var(--text-xs);
  line-height: 1.45;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  min-height: 2.9em;
}

.course-card-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
}

.course-card-chip {
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
  padding: 0.2rem 0.45rem;
  border-radius: var(--radius-full);
  font-size: 0.65rem;
  font-weight: 700;
  color: var(--text-secondary);
  background: var(--bg-alt);
  border: 1px solid var(--border);
}

.course-card-chip--cefr {
  color: var(--primary);
  background: var(--primary-light);
  border-color: rgba(15, 118, 110, 0.15);
}

.course-card--catalog .course-card-skills {
  margin-top: auto;
}

.course-card--catalog .course-skill-pill {
  width: 1.45rem;
  height: 1.2rem;
  font-size: 0.58rem;
}

.course-card--catalog .course-card-foot {
  margin-top: var(--space-1);
  padding-top: var(--space-3);
  border-top: 1px solid var(--border);
}

.course-card--catalog .course-card-price {
  font-size: var(--text-sm);
}

.courses-empty {
  grid-column: 1 / -1;
  text-align: center;
  padding: var(--space-10);
}

/* ─── Course cover (shared) ─── */
.course-cover {
  position: relative;
  display: block;
  overflow: hidden;
  background: linear-gradient(145deg, var(--navy-900), var(--teal-700));
}

.course-cover img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  transition: transform 0.55s cubic-bezier(0.4, 0, 0.2, 1);
}

.course-cover-shade {
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(15, 23, 42, 0.05) 0%, rgba(15, 23, 42, 0.45) 100%);
  pointer-events: none;
}

.course-cover-phase,
.course-cover-cefr {
  position: absolute;
  z-index: 2;
  font-size: 0.625rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 0.35rem 0.7rem;
  border-radius: var(--radius-full);
  backdrop-filter: blur(8px);
}

.course-cover-phase {
  top: var(--space-3);
  inset-inline-start: var(--space-3);
  background: rgba(255, 255, 255, 0.88);
  color: var(--navy-900);
}

.course-cover-cefr {
  top: var(--space-3);
  inset-inline-end: var(--space-3);
  background: rgba(15, 118, 110, 0.88);
  color: #fff;
}

.course-cover--card {
  aspect-ratio: 16 / 10;
}

.course-cover--spotlight,
.course-cover--hero {
  height: 100%;
  min-height: 280px;
}

.course-cover--home {
  aspect-ratio: 16 / 9;
  border-radius: var(--radius-lg) var(--radius-lg) 0 0;
}

.course-cover--method { --course-accent: var(--teal-500); }
.course-cover--toefl { --course-accent: var(--teal-700); }
.course-cover--skills { --course-accent: var(--gold-500); }
.course-cover--foundation { --course-accent: var(--navy-700); }

/* ─── Course card ─── */
.course-card {
  display: flex;
  flex-direction: column;
  padding: 0;
  border-radius: var(--radius-xl);
  background: var(--surface);
  border: 1px solid var(--border);
  box-shadow: var(--shadow-sm);
  transition: transform 0.28s ease, box-shadow 0.28s ease, border-color 0.28s ease;
  position: relative;
  overflow: hidden;
  cursor: pointer;
}

.course-card-hit {
  position: absolute;
  inset: 0;
  z-index: 2;
}

.course-card-hit::after {
  content: '';
  position: absolute;
  inset: 0;
}

.course-card:hover {
  transform: translateY(-6px);
  box-shadow: 0 20px 48px rgba(15, 23, 42, 0.12);
  border-color: rgba(15, 118, 110, 0.22);
}

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

.course-card-body {
  display: flex;
  flex-direction: column;
  flex: 1;
  gap: var(--space-3);
  padding: var(--space-5);
}

.course-card--method { --course-accent: var(--teal-500); }
.course-card--toefl { --course-accent: var(--teal-700); }
.course-card--skills { --course-accent: var(--gold-500); }
.course-card--foundation { --course-accent: var(--navy-700); }

.course-card--featured {
  border-color: rgba(212, 168, 83, 0.4);
  box-shadow: var(--shadow-md), 0 0 0 1px rgba(212, 168, 83, 0.12);
}

.course-card--featured::after {
  content: '';
  position: absolute;
  inset-inline: 0;
  top: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--gold-500), var(--teal-500));
  z-index: 3;
}

.course-card-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-2);
  flex-wrap: wrap;
}

.course-card-phase {
  font-size: 0.65rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--course-accent, var(--primary));
}

.course-card-cefr,
.course-card-badge {
  font-size: var(--text-xs);
  font-weight: 700;
  padding: 0.2rem 0.55rem;
  border-radius: var(--radius-sm);
}

.course-card-badge {
  background: linear-gradient(135deg, var(--gold-100), var(--surface));
  color: #92600a;
  border: 1px solid rgba(212, 168, 83, 0.35);
}

.course-card-title {
  margin: 0;
  font-size: var(--text-lg);
  font-weight: 800;
  letter-spacing: -0.02em;
  line-height: 1.25;
}

.course-card-summary {
  margin: 0;
  flex: 1;
  font-size: var(--text-sm);
  line-height: var(--leading-relaxed);
  color: var(--text-muted);
}

.course-card-skills {
  display: flex;
  gap: 0.35rem;
}

.course-skill-pill {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 1.65rem;
  height: 1.35rem;
  font-size: 0.62rem;
  font-weight: 800;
  letter-spacing: 0.04em;
  color: var(--primary);
  background: var(--primary-light);
  border: 1px solid rgba(15, 118, 110, 0.15);
  border-radius: var(--radius-sm);
}

.course-card-includes {
  margin: 0;
  font-size: var(--text-xs);
  font-weight: 600;
  color: var(--text-secondary);
}

.course-card-meta {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2) var(--space-4);
  margin: 0;
  padding: var(--space-3) 0 0;
  list-style: none;
  border-top: 1px solid var(--border);
  font-size: var(--text-xs);
  color: var(--text-secondary);
}

.course-card-meta li {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
}

.course-card-meta-icon {
  display: inline-flex;
  color: var(--primary);
  opacity: 0.85;
}

.course-card-foot {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
  margin-top: auto;
  padding-top: var(--space-2);
}

.course-card-price {
  font-size: var(--text-sm);
  font-weight: 800;
  color: var(--navy-900);
}

.course-card-price small {
  font-size: var(--text-xs);
  font-weight: 600;
  color: var(--text-muted);
}

.course-card-price--free {
  font-weight: 600;
  color: var(--text-muted);
}

.course-card-link {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  font-size: var(--text-sm);
  font-weight: 700;
  color: var(--primary);
  text-decoration: none;
  transition: gap var(--transition);
}

.course-card:hover .course-card-link { gap: 0.55rem; }

.courses-empty {
  text-align: center;
  padding: var(--space-12) var(--space-4);
  border-radius: var(--radius-xl);
  background: var(--surface);
  border: 1px dashed var(--border-strong);
}

.courses-empty p {
  margin: 0 0 var(--space-4);
  color: var(--text-muted);
}

/* ─── CTA ─── */
.courses-cta {
  padding: 0 0 clamp(var(--space-12), 8vw, var(--space-16));
}

.courses-cta-card {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-6);
  padding: clamp(var(--space-6), 5vw, var(--space-8));
  border-radius: var(--radius-xl);
  background: var(--surface);
  border: 1px solid var(--border);
  box-shadow: var(--shadow-md);
}

.courses-cta-copy h2 {
  margin: 0;
  font-size: clamp(var(--text-xl), 3vw, var(--text-2xl));
  font-weight: 800;
  letter-spacing: -0.02em;
}

.courses-cta-copy p {
  margin: var(--space-2) 0 0;
  max-width: 36rem;
  font-size: var(--text-sm);
  color: var(--text-muted);
  line-height: var(--leading-relaxed);
}

/* ─── Responsive ─── */
@media (max-width: 640px) {
  .courses-stats {
    grid-template-columns: 1fr;
    max-width: none;
  }

  .courses-spotlight-card {
    grid-template-columns: 1fr;
  }

  .courses-spotlight-media {
    min-height: 200px;
  }

  .courses-spotlight-actions {
    width: 100%;
  }

  .courses-spotlight-actions .btn {
    flex: 1;
    justify-content: center;
  }

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

  .courses-cta-card .btn {
    width: 100%;
    justify-content: center;
  }

  .course-card-foot {
    flex-direction: column;
    align-items: flex-start;
  }
}

@media (max-width: 480px) {
  .courses-hero-actions .btn {
    width: 100%;
    justify-content: center;
  }
}

@media (prefers-reduced-motion: reduce) {
  .course-card:hover { transform: none; }
  .course-card:hover .course-cover img { transform: none; }
}

/* ═══════════════════════════════════════════════════════════
   Course detail page
   ═══════════════════════════════════════════════════════════ */

.course-detail-page {
  --course-accent: var(--teal-500);
  --course-accent-deep: var(--teal-700);
  --course-accent-soft: rgba(20, 184, 166, 0.12);
  padding-bottom: calc(var(--space-16) + 4rem);
  background:
    radial-gradient(ellipse 70% 45% at 100% 0%, rgba(15, 118, 110, 0.07), transparent 55%),
    radial-gradient(ellipse 55% 40% at 0% 100%, rgba(212, 168, 83, 0.06), transparent 50%),
    var(--bg);
}

.course-detail-page--method {
  --course-accent: var(--teal-500);
  --course-accent-deep: var(--teal-700);
  --course-accent-soft: rgba(20, 184, 166, 0.12);
}

.course-detail-page--toefl {
  --course-accent: var(--teal-600);
  --course-accent-deep: var(--teal-800);
  --course-accent-soft: rgba(15, 118, 110, 0.14);
}

.course-detail-page--skills {
  --course-accent: var(--gold-500);
  --course-accent-deep: #92600a;
  --course-accent-soft: rgba(212, 168, 83, 0.16);
}

.course-detail-page--foundation {
  --course-accent: var(--navy-700);
  --course-accent-deep: var(--navy-900);
  --course-accent-soft: rgba(51, 65, 85, 0.12);
}

.course-detail-hero {
  position: relative;
  overflow: hidden;
  padding: clamp(var(--space-8), 6vw, var(--space-12)) 0 clamp(var(--space-6), 4vw, var(--space-8));
}

.course-detail-hero-bg {
  position: absolute;
  inset: 0;
  pointer-events: none;
}

.course-detail-hero-inner {
  position: relative;
  z-index: 1;
}

.course-breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-2);
  margin-bottom: var(--space-5);
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--text-muted);
}

.course-breadcrumb a {
  color: var(--primary);
  text-decoration: none;
  transition: opacity var(--transition);
}

.course-breadcrumb a:hover {
  opacity: 0.85;
  text-decoration: underline;
  text-underline-offset: 2px;
}

.course-breadcrumb-sep {
  opacity: 0.45;
  user-select: none;
}

.course-detail-hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
  gap: clamp(var(--space-8), 5vw, var(--space-12));
  align-items: center;
}

.course-detail-hero-tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin-bottom: var(--space-4);
}

.course-detail-tag {
  display: inline-flex;
  align-items: center;
  padding: 0.35rem 0.8rem;
  border-radius: var(--radius-full);
  font-size: var(--text-xs);
  font-weight: 800;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--course-accent-deep);
  background: var(--course-accent-soft);
  border: 1px solid rgba(15, 118, 110, 0.12);
}

.course-detail-tag--gold {
  color: #92600a;
  background: rgba(212, 168, 83, 0.18);
  border-color: rgba(212, 168, 83, 0.28);
}

.course-detail-tag--muted {
  color: var(--text-secondary);
  background: rgba(255, 255, 255, 0.82);
  border-color: var(--border);
  text-transform: none;
  letter-spacing: 0.02em;
  font-weight: 700;
}

.course-detail-hero h1 {
  margin: 0;
  font-size: clamp(1.55rem, 3.6vw, 2.25rem);
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 1.15;
  color: var(--navy-900);
}

.course-detail-lead {
  margin: var(--space-4) 0 0;
  font-size: clamp(var(--text-base), 2vw, var(--text-lg));
  line-height: var(--leading-relaxed);
  color: var(--text-secondary);
  max-width: 40rem;
}

.course-detail-stats {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: var(--space-3);
  margin-top: var(--space-6);
}

.course-detail-stat {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: var(--space-1);
  padding: var(--space-4);
  border-radius: var(--radius-lg);
  background: rgba(255, 255, 255, 0.82);
  border: 1px solid rgba(255, 255, 255, 0.95);
  box-shadow: var(--shadow-sm);
  backdrop-filter: blur(8px);
  min-width: 0;
}

.course-detail-stat strong {
  font-size: var(--text-xl);
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 1;
  color: var(--course-accent-deep);
}

.course-detail-stat span {
  font-size: var(--text-xs);
  font-weight: 600;
  color: var(--text-muted);
}

.course-detail-stat--price strong {
  color: var(--primary);
}

.course-detail-hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
  margin-top: var(--space-6);
}

.course-detail-hero-visual {
  border-radius: var(--radius-xl);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
  border: 1px solid var(--border);
  background: linear-gradient(145deg, var(--navy-900), var(--teal-700));
}

.course-detail-hero-visual .course-cover--hero {
  min-height: clamp(240px, 34vw, 380px);
  border-radius: var(--radius-xl);
}

.course-detail-main {
  padding: clamp(var(--space-6), 4vw, var(--space-8)) 0 0;
}

.course-detail-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(260px, 320px);
  gap: clamp(var(--space-8), 5vw, var(--space-12));
  align-items: start;
}

.course-detail-content {
  min-width: 0;
  padding: clamp(var(--space-6), 4vw, var(--space-8));
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-md);
}

.course-detail-section-head {
  margin-bottom: var(--space-6);
  padding-bottom: var(--space-5);
  border-bottom: 1px solid var(--border);
}

.course-detail-section-eyebrow {
  margin: 0 0 var(--space-2);
  font-size: var(--text-xs);
  font-weight: 800;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--course-accent-deep);
}

.course-detail-section-head h2 {
  margin: 0;
  font-size: clamp(var(--text-xl), 3vw, var(--text-2xl));
  font-weight: 800;
  letter-spacing: -0.025em;
  color: var(--navy-900);
}

.course-detail-body {
  font-size: var(--text-base);
  line-height: 1.85;
  color: var(--text-secondary);
}

.course-detail-body p {
  margin: 0 0 var(--space-4);
}

.course-detail-body p:last-child {
  margin-bottom: 0;
  padding: var(--space-4) var(--space-5);
  border-radius: var(--radius-lg);
  background: var(--course-accent-soft);
  border-inline-start: 3px solid var(--course-accent);
  color: var(--text);
  font-weight: 600;
}

.course-detail-body ul {
  list-style: none;
  margin: 0 0 var(--space-5);
  padding: 0;
  display: grid;
  gap: var(--space-3);
}

.course-detail-body li {
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
  padding: var(--space-4);
  border-radius: var(--radius-lg);
  background: var(--bg-alt);
  border: 1px solid var(--border);
  color: var(--text);
  font-weight: 600;
  line-height: 1.55;
}

.course-detail-body li::before {
  content: '';
  flex-shrink: 0;
  width: 0.55rem;
  height: 0.55rem;
  margin-top: 0.45rem;
  border-radius: 50%;
  background: var(--course-accent);
  box-shadow: 0 0 0 4px var(--course-accent-soft);
}

.course-detail-modules {
  margin-top: var(--space-8);
  padding: var(--space-6);
  border-radius: var(--radius-xl);
  background: var(--bg-alt);
  border: 1px solid var(--border);
}

.course-detail-modules-title {
  margin: 0 0 var(--space-4);
  font-size: var(--text-lg);
}

.course-detail-modules-list {
  margin: 0;
  padding-inline-start: 1.25rem;
  display: grid;
  gap: var(--space-3);
}

.course-detail-modules-list li {
  font-weight: 600;
  line-height: 1.5;
}

.course-detail-highlights-band {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: var(--space-3);
  margin-top: var(--space-8);
  padding-top: var(--space-6);
  border-top: 1px solid var(--border);
}

.course-detail-highlight {
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
  padding: var(--space-4);
  border-radius: var(--radius-lg);
  background: linear-gradient(165deg, rgba(255, 255, 255, 0.95), var(--bg-alt));
  border: 1px solid var(--border);
}

.course-detail-highlight-icon {
  flex-shrink: 0;
  color: var(--course-accent-deep);
}

.course-detail-highlight strong {
  display: block;
  margin-bottom: var(--space-1);
  font-size: var(--text-sm);
  color: var(--navy-900);
}

.course-detail-highlight span {
  display: block;
  font-size: var(--text-xs);
  line-height: 1.5;
  color: var(--text-muted);
}

.course-detail-actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
  margin-top: var(--space-8);
  padding-top: var(--space-6);
  border-top: 1px solid var(--border);
}

.course-detail-aside {
  display: grid;
  gap: var(--space-4);
}

.course-aside-card {
  padding: var(--space-6);
  border-radius: var(--radius-xl);
  background: var(--surface);
  border: 1px solid var(--border);
  box-shadow: var(--shadow-sm);
}

.course-aside-card--sticky {
  position: sticky;
  top: calc(var(--header-shell-h) + var(--space-4));
  background:
    linear-gradient(165deg, rgba(255, 255, 255, 0.98), rgba(240, 253, 250, 0.92));
  border-color: rgba(15, 118, 110, 0.18);
  box-shadow: var(--shadow-md);
}

.course-aside-eyebrow,
.course-aside-label {
  margin: 0 0 var(--space-2);
  font-size: var(--text-xs);
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--primary);
}

.course-aside-title {
  margin: 0 0 var(--space-4);
  font-size: var(--text-lg);
  font-weight: 800;
  line-height: 1.35;
  letter-spacing: -0.02em;
  color: var(--navy-900);
}

.course-aside-facts {
  list-style: none;
  margin: 0 0 var(--space-4);
  padding: 0;
  display: grid;
  gap: var(--space-2);
}

.course-aside-facts li {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--text-secondary);
}

.course-aside-note {
  margin: 0 0 var(--space-5);
  font-size: var(--text-sm);
  line-height: var(--leading-relaxed);
  color: var(--text-muted);
}

.course-aside-includes {
  margin: 0 0 var(--space-3);
  font-size: var(--text-xs);
  font-weight: 600;
  color: var(--primary);
  line-height: var(--leading-relaxed);
}

.course-aside-actions {
  display: grid;
  gap: var(--space-3);
}

.course-related-list {
  list-style: none;
  margin: var(--space-3) 0 0;
  padding: 0;
  display: grid;
  gap: var(--space-2);
}

.course-related-item {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-3);
  border-radius: var(--radius-lg);
  text-decoration: none;
  color: inherit;
  border: 1px solid transparent;
  transition: background var(--transition), border-color var(--transition), transform var(--transition);
}

.course-related-item:hover {
  background: var(--bg-alt);
  border-color: var(--border);
  transform: translateY(-1px);
}

.course-related-thumb {
  flex-shrink: 0;
  width: 64px;
  height: 44px;
  border-radius: var(--radius-sm);
  overflow: hidden;
  border: 1px solid var(--border);
  background: linear-gradient(145deg, var(--navy-900), var(--teal-700));
}

.course-related-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.course-related-text {
  display: flex;
  flex-direction: column;
  gap: 0.15rem;
  min-width: 0;
}

.course-related-text strong {
  font-size: var(--text-sm);
  font-weight: 700;
  line-height: 1.35;
  color: var(--text);
}

.course-related-text small {
  font-size: var(--text-xs);
  font-weight: 600;
  color: var(--text-muted);
}

.course-detail-cta {
  padding: clamp(var(--space-12), 8vw, var(--space-16)) 0 clamp(var(--space-4), 3vw, var(--space-6));
}

.course-detail-cta-card {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-6);
  padding: clamp(var(--space-7), 5vw, var(--space-10));
  border-radius: var(--radius-xl);
  background: linear-gradient(135deg, var(--navy-900) 0%, var(--teal-700) 100%);
  color: #f8fafc;
  box-shadow: var(--shadow-lg);
}

.course-detail-cta-copy h2 {
  margin: 0;
  font-size: clamp(var(--text-xl), 3vw, var(--text-2xl));
  font-weight: 800;
  letter-spacing: -0.02em;
}

.course-detail-cta-copy p {
  margin: var(--space-2) 0 0;
  max-width: 36rem;
  font-size: var(--text-sm);
  line-height: var(--leading-relaxed);
  color: rgba(248, 250, 252, 0.78);
}

.course-detail-cta-card .btn-primary {
  background: #fff;
  color: var(--navy-900);
  border-color: #fff;
}

.course-detail-cta-card .btn-primary:hover {
  background: var(--teal-50);
}

.course-detail-mobile-bar {
  display: none;
}

@media (max-width: 960px) {
  .course-detail-hero-grid,
  .course-detail-layout {
    grid-template-columns: 1fr;
  }

  .course-detail-hero-visual {
    order: -1;
    max-width: 560px;
  }

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

  .course-detail-highlights-band {
    grid-template-columns: 1fr;
  }

  .course-aside-card--sticky {
    position: static;
  }

  .course-detail-aside {
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  }
}

@media (max-width: 640px) {
  .course-detail-page {
    padding-bottom: calc(var(--space-12) + 5rem);
  }

  .course-detail-hero-actions,
  .course-detail-actions {
    flex-direction: column;
  }

  .course-detail-hero-actions .btn,
  .course-detail-actions .btn {
    width: 100%;
    justify-content: center;
  }

  .course-detail-aside {
    grid-template-columns: 1fr;
  }

  .course-detail-cta-card {
    flex-direction: column;
    align-items: stretch;
  }

  .course-detail-cta-card .btn {
    width: 100%;
    justify-content: center;
  }

  .course-detail-mobile-bar {
    display: block;
    position: fixed;
    inset-inline: 0;
    bottom: 0;
    z-index: 40;
    padding: var(--space-3) var(--space-4) calc(var(--space-3) + env(safe-area-inset-bottom, 0px));
    background: rgba(255, 255, 255, 0.92);
    border-top: 1px solid var(--border);
    box-shadow: 0 -8px 32px rgba(15, 23, 42, 0.08);
    backdrop-filter: blur(12px);
  }

  .course-detail-mobile-bar-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-3);
    max-width: var(--container);
    margin-inline: auto;
  }

  .course-detail-mobile-bar-copy {
    display: flex;
    flex-direction: column;
    gap: 0.1rem;
    min-width: 0;
  }

  .course-detail-mobile-bar-copy strong {
    font-size: var(--text-sm);
    font-weight: 700;
    color: var(--navy-900);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
  }

  .course-detail-mobile-bar-copy span {
    font-size: var(--text-xs);
    font-weight: 600;
    color: var(--primary);
  }

  .course-detail-mobile-bar .btn {
    flex-shrink: 0;
  }
}

@media (prefers-reduced-motion: reduce) {
  .course-related-item:hover {
    transform: none;
  }
}