body.space-bg {
  background-attachment: fixed;
}

.guide-hero {
  position: relative;
}

.guide-hero-inner {
  display: grid;
  grid-template-columns: minmax(0, 1.4fr) minmax(0, 1fr);
  gap: var(--space-10);
  align-items: center;
}

@media (max-width: 900px) {
  .guide-hero-inner {
    grid-template-columns: minmax(0, 1fr);
  }
}

.guide-hero-text h1 {
  margin-bottom: var(--space-3);
}

.guide-hero-meta {
  margin-top: var(--space-5);
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
}

.guide-hero-visual {
  position: relative;
  min-height: 260px;
}

.guide-hero-orbit {
  position: absolute;
  inset: 0;
  border-radius: 999px;
  border: 1px dashed rgba(56, 189, 248, 0.5);
  opacity: 0.7;
}

.guide-hero-planet {
  position: absolute;
  inset: 18%;
  border-radius: 999px;
  background: radial-gradient(circle at 30% 20%, #e5e7eb, #38bdf8 40%, #0b1120 70%);
  box-shadow: var(--shadow-elevated), var(--glow-purple);
}

.guide-hero-ring {
  position: absolute;
  border-radius: 999px;
  border: 1px solid rgba(148, 163, 184, 0.55);
}

.guide-hero-ring--outer {
  inset: 6%;
  transform: rotate(18deg);
}

.guide-hero-ring--inner {
  inset: 32%;
  transform: rotate(-18deg);
}

.guide-toc-card {
  display: flex;
  flex-direction: column;
  gap: var(--space-5);
}

.guide-toc-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--space-3);
}

@media (max-width: 768px) {
  .guide-toc-grid {
    grid-template-columns: minmax(0, 1fr);
  }
}

.guide-toc-item {
  padding: 10px 14px;
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border-subtle);
  background: rgba(15, 23, 42, 0.9);
  font-size: var(--text-sm);
  color: var(--color-text-soft);
  transition: background-color var(--transition-normal), border-color var(--transition-normal), transform var(--transition-fast), box-shadow var(--transition-fast);
}

.guide-toc-item:hover {
  border-color: var(--color-primary);
  background: var(--color-bg-elevated);
  box-shadow: var(--glow-soft);
  transform: translateY(-1px);
}

.guide-section-grid {
  align-items: center;
  gap: var(--space-8);
}

.guide-section-alt {
  flex-direction: row-reverse;
}

@media (max-width: 900px) {
  .guide-section-alt {
    flex-direction: column;
  }
}

.guide-section-header {
  max-width: 720px;
  margin: 0 auto var(--space-8);
  text-align: center;
}

.guide-section-header p {
  margin-top: var(--space-2);
}

.guide-card-grid {
  align-items: stretch;
}

.guide-figure {
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid rgba(148, 163, 184, 0.35);
  background: rgba(15, 23, 42, 0.96);
  box-shadow: var(--shadow-soft);
}

.guide-figure img {
  width: 100%;
  height: auto;
}

.guide-figure figcaption {
  padding: var(--space-3) var(--space-4);
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  background: radial-gradient(circle at top left, rgba(56, 189, 248, 0.16), transparent 55%), rgba(15, 23, 42, 0.96);
}

.guide-inline-link {
  color: var(--color-primary);
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
}

.guide-inline-link:hover {
  color: var(--color-primary-strong);
}

.alert ul {
  margin-top: var(--space-3);
}