.course-hero,
.course-detail-hero {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(280px, 0.9fr);
  gap: 24px;
  align-items: stretch;
  padding: 30px;
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-glass-lg);
  background:
    radial-gradient(circle at 88% 12%, rgba(56, 189, 248, 0.18), transparent 28rem),
    radial-gradient(circle at 18% 88%, rgba(139, 92, 246, 0.12), transparent 26rem),
    linear-gradient(135deg, rgba(255, 255, 255, 0.74), rgba(241, 245, 249, 0.46));
  box-shadow: var(--glass-shadow-soft), var(--glass-inner-highlight);
  backdrop-filter: blur(var(--glass-blur));
  -webkit-backdrop-filter: blur(var(--glass-blur));
}

.course-toolbar {
  display: grid;
  gap: 14px;
  padding: 20px;
}

.course-toolbar label,
.course-kicker {
  margin: 0;
  color: var(--color-text-muted);
  font-size: 0.84rem;
  font-weight: 800;
  text-transform: uppercase;
}

.course-toolbar input {
  width: 100%;
  min-height: 46px;
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-glass-sm);
  padding: 0 14px;
  color: var(--color-text);
  background: rgba(255, 255, 255, 0.66);
  box-shadow: var(--glass-inner-highlight);
  backdrop-filter: blur(var(--glass-blur));
  -webkit-backdrop-filter: blur(var(--glass-blur));
}

.filter-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.filter-chip {
  min-height: 38px;
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-pill);
  background: var(--glass-bg-subtle);
  color: var(--color-text-secondary);
  padding: 0 13px;
  font-weight: 800;
  cursor: pointer;
  box-shadow: var(--glass-inner-highlight);
  backdrop-filter: blur(var(--glass-blur));
  -webkit-backdrop-filter: blur(var(--glass-blur));
  transition: transform var(--motion-fast) var(--ease-glass), border-color var(--motion-fast) ease, background var(--motion-fast) ease, box-shadow var(--motion-fast) ease;
}

.filter-chip.active,
.filter-chip:hover,
.filter-chip:focus-visible {
  border-color: var(--color-primary);
  color: var(--color-primary);
  background: rgba(219, 234, 254, 0.72);
  box-shadow: var(--glass-shadow-soft), var(--glass-inner-highlight);
  transform: translateY(-1px);
}

.courses-module-grid {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  gap: 16px;
}

.course-card {
  min-height: 230px;
  grid-column: span 4;
  display: grid;
  align-content: space-between;
  gap: 20px;
  padding: 20px;
  overflow: hidden;
  transition: transform var(--motion-normal) var(--ease-glass), box-shadow var(--motion-normal) var(--ease-glass), border-color var(--motion-fast) ease;
}

.course-card:hover {
  transform: translateY(-6px);
  border-color: var(--glass-border-strong);
  box-shadow: var(--glass-shadow);
}

.course-card:nth-child(5n + 1),
.course-card:nth-child(7n + 4) {
  grid-column: span 6;
}

.course-card h3,
.course-info-card h3,
.course-next-panel h3 {
  margin: 0 0 8px;
}

.course-card p,
.course-info-card p,
.course-next-panel p {
  color: var(--color-text-secondary);
  line-height: 1.65;
}

.course-number {
  width: 44px;
  height: 44px;
  display: inline-grid;
  place-items: center;
  border-radius: var(--radius-glass-sm);
  background:
    linear-gradient(135deg, rgba(56, 189, 248, 0.22), rgba(139, 92, 246, 0.18)),
    var(--color-bg-dark);
  color: var(--color-text-light);
  font-weight: 900;
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.28), 0 10px 24px rgba(15, 23, 42, 0.18);
}

.course-link,
.back-link {
  width: fit-content;
  display: inline-flex;
  min-height: 42px;
  align-items: center;
  border-radius: var(--radius-pill);
  border: 1px solid var(--glass-border);
  padding: 0 15px;
  color: var(--color-text);
  background: var(--glass-bg-strong);
  text-decoration: none;
  font-weight: 800;
  box-shadow: var(--glass-shadow-soft), var(--glass-inner-highlight);
  backdrop-filter: blur(var(--glass-blur));
  -webkit-backdrop-filter: blur(var(--glass-blur));
  transition: transform var(--motion-fast) var(--ease-glass), box-shadow var(--motion-fast) ease, border-color var(--motion-fast) ease, color var(--motion-fast) ease;
}

.course-link:hover,
.back-link:hover {
  color: var(--color-primary);
  border-color: var(--glass-border-strong);
  transform: translateY(-2px);
  box-shadow: var(--glass-shadow);
}

.course-detail-hero {
  background:
    radial-gradient(circle at 88% 16%, color-mix(in srgb, var(--course-accent, #2563eb) 28%, transparent), transparent 26rem),
    linear-gradient(135deg, rgba(255, 255, 255, 0.74), rgba(248, 250, 252, 0.48));
}

.course-signal {
  display: grid;
  min-height: 220px;
  place-items: center;
  background:
    radial-gradient(circle at 24% 18%, rgba(255, 255, 255, 0.34), transparent 24%),
    linear-gradient(135deg, color-mix(in srgb, var(--course-accent, #2563eb) 88%, #111827), #111827);
  border: 1px solid rgba(255, 255, 255, 0.22);
  box-shadow: var(--glass-shadow), inset 0 1px 0 rgba(255, 255, 255, 0.28);
}

.course-signal span {
  color: #ffffff;
  font-size: clamp(4rem, 12vw, 8rem);
  font-weight: 950;
}

.course-detail-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
}

.course-info-card,
.course-next-panel,
.empty-state {
  padding: 22px;
}

.compact-list {
  gap: 8px;
}

.compact-list li {
  padding: 10px 12px;
}

body[class*="theme-"] .site-header {
  border-color: color-mix(in srgb, var(--course-accent, #2563eb) 28%, var(--color-border));
}

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

  .course-card,
  .course-card:nth-child(5n + 1),
  .course-card:nth-child(7n + 4) {
    grid-column: span 6;
  }
}

@media (max-width: 620px) {
  .courses-module-grid {
    grid-template-columns: 1fr;
  }

  .course-card,
  .course-card:nth-child(5n + 1),
  .course-card:nth-child(7n + 4) {
    grid-column: span 1;
  }
}