/* Course page design, aligned with logo.svg palette. */
:root {
  --course-blue-900: #003bde;
  --course-blue-700: #0268f4;
  --course-blue-500: #0f94f6;
  --course-cyan-400: #13d7f8;
  --course-bg: #ffffff;
  --course-surface: #f6f9ff;
  --course-panel: #ffffff;
  --course-text: #111827;
  --course-muted: #5b6675;
  --course-line: rgba(0, 59, 222, 0.13);
  --course-line-strong: rgba(0, 59, 222, 0.22);
  --course-primary: var(--course-blue-900);
  --course-secondary: var(--course-blue-500);
}

[data-bs-theme="dark"] {
  --course-bg: #080d1b;
  --course-surface: #0f1730;
  --course-panel: #10192f;
  --course-text: #f7faff;
  --course-muted: #bdc9dd;
  --course-line: rgba(19, 215, 248, 0.17);
  --course-line-strong: rgba(19, 215, 248, 0.28);
  --course-primary: #91b1f4;
  --course-secondary: var(--course-cyan-400);
}

body {
  padding: 0;
  background:
    radial-gradient(circle at 86% 0%, rgba(19, 215, 248, 0.15), transparent 24rem),
    linear-gradient(180deg, var(--course-surface) 0, var(--course-bg) 34rem);
  color: var(--course-text);
}

.course-page {
  max-width: 1180px;
  margin: 0 auto;
  padding: 118px 24px 84px;
}

.course-page header {
  max-width: 820px;
  margin-bottom: 48px;
}

.course-page h1 {
  margin: 0;
  color: var(--course-text);
  font-size: clamp(2.45rem, 4.6vw, 3.7rem);
  font-weight: 700;
  line-height: 1;
  letter-spacing: 0;
}

.course-page section {
  margin: 56px 0;
}

.course-page h3 {
  margin: 0 0 24px;
  padding-bottom: 0;
  color: var(--course-text);
  font-size: clamp(1.35rem, 2.4vw, 1.9rem);
  font-weight: 600;
  line-height: 1.2;
  letter-spacing: 0;
}

.course-page h5 {
  display: inline-flex;
  align-items: center;
  min-height: 0;
  margin: 20px 0 8px;
  padding: 0;
  border-radius: 0;
  background: transparent;
  color: var(--course-primary);
  box-shadow: none;
  font-size: 1.08rem;
  font-weight: 600;
  line-height: 1.25;
  letter-spacing: 0.03em;
}

.course-page ul[role="list"] {
  margin: 0 0 4px;
  padding: 0;
  list-style: none;
}

.course-page li {
  position: relative;
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 6px 10px;
  padding: 11px 0 11px 18px;
  color: var(--course-muted);
  font-size: 0.98rem;
  font-weight: 500;
  line-height: 1.55;
}

.course-page li::before {
  content: "";
  position: absolute;
  top: 20px;
  left: 0;
  width: 6px;
  height: 6px;
  border-radius: 999px;
  background: var(--course-secondary);
}

.course-page li:hover {
  background: transparent;
}

.course-page a,
.course-page .course-name {
  color: var(--course-text);
  border-radius: 4px;
  font-size: 1.02rem;
  font-weight: 600;
  text-decoration: none;
  transition: color 0.16s ease;
}

.course-page a:hover,
.course-page a:focus {
  color: var(--course-primary);
  text-decoration: underline;
  text-decoration-thickness: 2px;
  text-underline-offset: 3px;
}

.course-page a:focus-visible {
  outline: 2px solid var(--course-secondary);
  outline-offset: 3px;
}

.course-page li > span {
  color: var(--course-muted);
}

.site-footer {
  margin-top: 70px;
}

@media (max-width: 860px) {
  .course-page {
    padding: 104px 18px 68px;
  }

  .course-page section {
    margin: 46px 0;
  }
}

@media (max-width: 560px) {
  .course-page h1 {
    font-size: clamp(2.25rem, 12vw, 3.15rem);
  }

  .course-page li {
    display: block;
    padding: 11px 0 11px 14px;
  }

  .course-page li > span {
    display: block;
    margin-top: 3px;
  }
}