:root {
  --course-bg: #06101c;
  --course-bg-deep: #02060d;
  --course-panel: rgba(10, 20, 34, 0.9);
  --course-panel-strong: rgba(12, 25, 42, 0.96);
  --course-border: rgba(92, 220, 255, 0.2);
  --course-border-strong: rgba(92, 220, 255, 0.38);
  --course-cyan: #7be7ff;
  --course-cyan-strong: #16d9ff;
  --course-gold: #ffd66b;
  --course-gold-strong: #ffb547;
  --course-text: #eff7ff;
  --course-muted: #a8bfd5;
  --course-soft: #7a91ab;
  --course-shadow: 0 28px 60px rgba(0, 0, 0, 0.42);
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html,
body {
  min-height: 100%;
  margin: 0;
  background:
    radial-gradient(circle at top left, rgba(22, 217, 255, 0.12), transparent 28%),
    radial-gradient(circle at top right, rgba(170, 110, 255, 0.1), transparent 26%),
    linear-gradient(180deg, var(--course-bg-deep) 0%, var(--course-bg) 52%, #040912 100%);
}

body.course-page {
  color: var(--course-text);
  font-family: "Space Grotesk", "Segoe UI", sans-serif;
  line-height: 1.7;
  overflow-x: hidden;
}

body.course-page::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  background:
    linear-gradient(rgba(123, 231, 255, 0.025) 1px, transparent 1px),
    linear-gradient(90deg, rgba(123, 231, 255, 0.025) 1px, transparent 1px);
  background-size: 42px 42px;
  mask-image: radial-gradient(circle at center, black 40%, transparent 100%);
}

.course-shell {
  position: relative;
  z-index: 1;
  max-width: 1120px;
  margin: 0 auto;
  padding: 40px 20px 88px;
}

.course-breadcrumbs {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  align-items: center;
  margin-bottom: 18px;
  color: var(--course-soft);
  font-family: "Share Tech Mono", monospace;
  font-size: 12px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.course-breadcrumbs a {
  color: var(--course-cyan);
  text-decoration: none;
}

.course-breadcrumbs a:hover {
  text-decoration: underline;
}

.course-hero,
.course-section,
.course-cta-band,
.course-footer {
  background: linear-gradient(180deg, rgba(15, 28, 45, 0.94), var(--course-panel));
  border: 1px solid var(--course-border);
  border-radius: 24px;
  box-shadow: var(--course-shadow);
}

.course-hero {
  padding: 38px;
  margin-bottom: 24px;
  overflow: hidden;
  position: relative;
}

.course-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: radial-gradient(circle at top center, rgba(123, 231, 255, 0.12), transparent 45%);
}

.course-kicker,
.course-tag,
.course-module-index,
.course-support-label,
.course-pill {
  font-family: "Share Tech Mono", monospace;
  text-transform: uppercase;
  letter-spacing: 0.12em;
}

.course-kicker {
  color: var(--course-cyan);
  font-size: 12px;
  margin-bottom: 14px;
}

.course-hero h1,
.course-section h2,
.course-module-title,
.course-footer-brand {
  font-family: "Orbitron", sans-serif;
}

.course-hero h1 {
  margin: 0 0 14px;
  font-size: clamp(32px, 6vw, 58px);
  line-height: 1.08;
  letter-spacing: 0.02em;
}

.course-subtitle {
  max-width: 760px;
  margin: 0;
  font-size: 18px;
  color: var(--course-muted);
}

.course-meta-row,
.course-chip-row,
.course-actions,
.course-footer-links,
.course-socials {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.course-meta-row {
  margin-top: 24px;
}

.course-pill {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 14px;
  border-radius: 999px;
  border: 1px solid rgba(123, 231, 255, 0.22);
  background: rgba(123, 231, 255, 0.08);
  color: var(--course-cyan);
  font-size: 11px;
}

.course-chip-row {
  margin-top: 22px;
}

.course-tag {
  display: inline-flex;
  padding: 8px 12px;
  border-radius: 999px;
  border: 1px solid rgba(255, 214, 107, 0.25);
  background: rgba(255, 214, 107, 0.08);
  color: var(--course-gold);
  font-size: 11px;
}

.course-actions {
  margin-top: 28px;
}

.course-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 50px;
  padding: 0 22px;
  border-radius: 14px;
  border: 1px solid transparent;
  text-decoration: none;
  font-weight: 700;
  transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
}

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

.course-btn-primary {
  background: linear-gradient(135deg, var(--course-gold), var(--course-gold-strong));
  color: #161003;
  box-shadow: 0 16px 34px rgba(255, 181, 71, 0.24);
}

.course-btn-secondary {
  background: rgba(123, 231, 255, 0.07);
  border-color: rgba(123, 231, 255, 0.28);
  color: var(--course-cyan);
}

.course-note {
  margin-top: 14px;
  color: var(--course-soft);
  font-size: 13px;
}

.course-layout {
  display: grid;
  grid-template-columns: minmax(0, 1.55fr) minmax(280px, 0.9fr);
  gap: 24px;
  align-items: start;
}

.course-section {
  padding: 30px;
  margin-bottom: 24px;
}

.course-section h2 {
  margin: 0 0 12px;
  font-size: clamp(22px, 3vw, 34px);
  line-height: 1.15;
}

.course-section-intro {
  margin: 0 0 22px;
  color: var(--course-muted);
  font-size: 16px;
}

.course-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
}

.course-card,
.course-module,
.course-support-card {
  border-radius: 18px;
  background: var(--course-panel-strong);
  border: 1px solid rgba(123, 231, 255, 0.12);
}

.course-card {
  padding: 18px;
}

.course-card h3,
.course-support-card h3 {
  margin: 0 0 8px;
  font-size: 16px;
}

.course-card p,
.course-support-card p,
.course-module-copy,
.course-module-list li {
  color: var(--course-muted);
  font-size: 15px;
}

.course-card strong,
.course-module-copy strong,
.course-module-list strong,
.course-support-card strong {
  color: var(--course-text);
}

.course-module-stack {
  display: grid;
  gap: 18px;
}

.course-module {
  padding: 22px;
}

.course-module-head {
  display: flex;
  gap: 16px;
  align-items: start;
  margin-bottom: 12px;
}

.course-module-index {
  flex: 0 0 auto;
  min-width: 84px;
  padding: 10px 12px;
  border-radius: 12px;
  background: rgba(22, 217, 255, 0.08);
  border: 1px solid rgba(22, 217, 255, 0.18);
  color: var(--course-cyan);
  font-size: 11px;
  text-align: center;
}

.course-module-title {
  margin: 0;
  font-size: 20px;
  line-height: 1.2;
}

.course-module-copy {
  margin: 0 0 14px;
}

.course-module-list {
  margin: 0;
  padding-left: 18px;
}

.course-module-list li + li {
  margin-top: 6px;
}

.course-support-col {
  display: grid;
  gap: 16px;
}

.course-support-card {
  padding: 20px;
}

.course-support-label {
  display: inline-block;
  margin-bottom: 10px;
  color: var(--course-cyan);
  font-size: 11px;
}

.course-highlight {
  border-color: var(--course-border-strong);
  box-shadow: 0 18px 40px rgba(22, 217, 255, 0.08);
}

.course-cta-band {
  padding: 24px 28px;
  margin: 24px 0;
}

.course-cta-band h3 {
  margin: 0 0 8px;
  font-family: "Orbitron", sans-serif;
  font-size: 22px;
}

.course-cta-band p {
  margin: 0;
  color: var(--course-muted);
}

.course-footer {
  padding: 30px;
  margin-top: 10px;
  text-align: center;
}

.course-footer-brand {
  margin-bottom: 12px;
  font-size: 12px;
  color: var(--course-cyan);
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.course-disclaimer,
.course-copy {
  margin: 0 auto 16px;
  max-width: 760px;
  color: var(--course-soft);
  font-size: 13px;
}

.course-footer-links,
.course-socials {
  justify-content: center;
  margin-bottom: 18px;
}

.course-footer a {
  color: var(--course-cyan);
  text-decoration: none;
}

.course-footer a:hover {
  text-decoration: underline;
}

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

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

@media (max-width: 640px) {
  .course-shell {
    padding: 24px 14px 60px;
  }

  .course-hero,
  .course-section,
  .course-cta-band,
  .course-footer {
    padding: 22px;
    border-radius: 20px;
  }

  .course-module-head {
    flex-direction: column;
  }

  .course-btn {
    width: 100%;
  }
}