.course-hero {
  position: relative;
  padding: 64px 0 0;
  overflow: hidden;
}

.course-hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse 60% 50% at 15% 0%, color-mix(in srgb, var(--prog-accent, var(--accent)) 16%, transparent), transparent 60%);
  pointer-events: none;
}

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

.course-back {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-family: var(--mono);
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-bottom: 28px;
}

.course-back:hover { color: var(--prog-accent, var(--accent)); }

.course-hero-top {
  display: flex;
  align-items: center;
  gap: 20px;
  margin-bottom: 18px;
}

.course-icon {
  width: 56px;
  height: 56px;
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 14px;
  background: color-mix(in srgb, var(--prog-accent, var(--accent)) 12%, var(--bg));
  border: 1px solid color-mix(in srgb, var(--prog-accent, var(--accent)) 30%, var(--border));
  color: var(--prog-accent, var(--accent));
}

.course-eyebrow {
  font-family: var(--mono);
  font-size: 0.78rem;
  color: var(--prog-accent, var(--accent));
  margin-bottom: 6px;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.course-title {
  font-size: clamp(1.8rem, 4vw, 2.6rem);
  font-weight: 700;
  line-height: 1.15;
}

.course-lede {
  font-size: 1rem;
  color: var(--text-muted);
  line-height: 1.7;
  margin: 18px 0 32px;
  max-width: 640px;
}

.course-stats {
  display: flex;
  flex-wrap: wrap;
  gap: 32px;
  margin-bottom: 32px;
  padding: 22px 0;
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

.course-stat {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.course-stat-label {
  font-family: var(--mono);
  font-size: 0.65rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-dim);
}

.course-stat-value {
  font-size: 0.95rem;
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: 8px;
}

.course-level {
  display: flex;
  align-items: flex-end;
  gap: 3px;
}

.course-level-seg {
  width: 6px;
  background: var(--border-accent);
  border-radius: 1px;
}

.course-level-seg:nth-child(1) { height: 10px; }
.course-level-seg:nth-child(2) { height: 15px; }
.course-level-seg:nth-child(3) { height: 20px; }

.course-level-seg.is-on {
  background: var(--prog-accent, var(--accent));
  box-shadow: 0 0 8px color-mix(in srgb, var(--prog-accent, var(--accent)) 55%, transparent);
}

.course-arsenal { margin-bottom: 32px; }

.course-arsenal ul {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  list-style: none;
  margin: 0;
  padding: 0;
}

.course-arsenal li {
  font-family: var(--mono);
  font-size: 0.78rem;
  padding: 6px 12px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--text-muted);
  background: var(--bg);
}

.course-arsenal li::before {
  content: '$ ';
  color: var(--prog-accent, var(--accent));
}

.course-actions {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  padding-bottom: 48px;
}

.course-content {
  padding: 48px 0 80px;
  max-width: 860px;
}

.course-content--empty { padding-top: 20px; }

.course-hero--empty { padding: 100px 0; text-align: center; }
.course-hero--empty .course-hero-inner { max-width: 480px; margin: 0 auto; }
.course-hero--empty .course-title { margin-top: 16px; }
.course-hero--empty .course-lede { margin: 16px auto 28px; }
.course-hero--empty .btn { margin: 0 auto; }

@media (max-width: 640px) {
  .course-hero { padding-top: 40px; }
  .course-hero-top { flex-direction: column; align-items: flex-start; gap: 14px; }
  .course-stats { gap: 20px; }
}