:root {
  --content-max-width: 980px;
  --cavvy-accent: #0f766e;
  --cavvy-accent-strong: #b42318;
  --cavvy-ink: #1f2937;
  --cavvy-muted: #667085;
  --cavvy-line: #d0d5dd;
  --cavvy-surface: #f8fafc;
}

.content {
  max-width: var(--content-max-width);
}

.content main {
  line-height: 1.72;
}

.content h1,
.content h2,
.content h3 {
  letter-spacing: 0;
}

.content h1 {
  border-bottom: 2px solid var(--cavvy-accent);
  padding-bottom: 0.35rem;
}

.content h2 {
  border-bottom: 1px solid var(--cavvy-line);
  padding-bottom: 0.25rem;
}

.content table {
  border-collapse: collapse;
  width: 100%;
}

.content table th {
  background: var(--cavvy-surface);
}

.content table th,
.content table td {
  border: 1px solid var(--cavvy-line);
  padding: 0.55rem 0.7rem;
}

.content pre {
  border-radius: 8px;
  border: 1px solid rgba(16, 24, 40, 0.14);
}

.content code {
  font-size: 0.95em;
}

.sidebar {
  border-right: 1px solid var(--cavvy-line);
}

/* mdBook 的导航容器默认覆盖半个视口，容易拦截正文点击。 */
.nav-chapters {
  pointer-events: none;
}

.nav-chapters a {
  display: flex;
  width: 3rem;
  height: 100%;
  align-items: center;
  justify-content: center;
  padding: 0;
  pointer-events: auto;
}

.nav-chapters.next a {
  margin-left: auto;
}

.chapter li.part-title {
  color: var(--cavvy-accent-strong);
  font-weight: 700;
  letter-spacing: 0;
}