:root {
  --bg: #1e2124;
  --card: #2a2d31;
  --text: #eeeeee;
  --dim: rgba(255,255,255,0.6);
  --accent: #ffd60a;
  --border: rgba(255,255,255,0.15);
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  -webkit-text-size-adjust: 100%;
}

body {
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Helvetica Neue", Arial, sans-serif;
  line-height: 1.65;
  padding: 24px 16px 60px;
  min-height: 100vh;
}

main {
  max-width: 720px;
  margin: 0 auto;
}

header {
  text-align: center;
  padding: 32px 0 24px;
}

h1 {
  font-size: 2rem;
  margin-bottom: 4px;
}

.subtitle {
  color: var(--dim);
  font-size: 0.95rem;
}

h2 {
  font-size: 1.15rem;
  margin: 20px 0 12px;
  color: var(--accent);
}

h3 {
  font-size: 1rem;
  margin: 18px 0 8px;
  color: var(--text);
}

.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 20px 24px;
  margin: 16px 0;
}

ul, ol {
  padding-left: 22px;
  margin: 8px 0;
}

li {
  margin: 6px 0;
}

a {
  color: var(--accent);
  text-decoration: none;
  border-bottom: 1px dotted var(--accent);
}

a:hover {
  border-bottom-style: solid;
}

p {
  margin: 8px 0;
}

strong {
  color: #fff;
}

hr {
  border: none;
  border-top: 1px dashed var(--border);
  margin: 24px 0;
}

footer {
  text-align: center;
  color: var(--dim);
  font-size: 0.85rem;
  margin-top: 40px;
  padding-top: 20px;
  border-top: 1px solid var(--border);
}

.doc-body {
  line-height: 1.75;
}

.doc-body p {
  margin: 10px 0;
}

.doc-body .lang-divider {
  text-align: center;
  color: var(--dim);
  padding: 24px 0;
  font-size: 0.9rem;
  letter-spacing: 0.2em;
}

.meta {
  color: var(--dim);
  font-size: 0.9rem;
  margin-bottom: 16px;
}

.back {
  display: inline-block;
  margin-bottom: 20px;
  color: var(--dim);
  border-bottom: 1px dotted var(--dim);
}

.back:hover {
  color: var(--accent);
  border-bottom-color: var(--accent);
}

code {
  background: rgba(255,255,255,0.08);
  padding: 2px 6px;
  border-radius: 4px;
  font-family: "SF Mono", Menlo, Consolas, monospace;
  font-size: 0.85em;
}