:root {
  color-scheme: dark;
  --bg: #000;
  --fg: #fff;
  --fg-dim: rgba(255, 255, 255, 0.85);
  --fg-faint: rgba(255, 255, 255, 0.5);
  --accent: rgba(255, 255, 255, 0.1);
  --border: rgba(255, 255, 255, 0.15);
}

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

body {
  background: var(--bg);
  color: var(--fg-dim);
  font-family: -apple-system, BlinkMacSystemFont, "Helvetica Neue", "Hiragino Sans", sans-serif;
  line-height: 1.8;
  -webkit-font-smoothing: antialiased;
  font-size: 14px;
}

.container {
  max-width: 720px;
  margin: 0 auto;
  padding: 40px 24px 80px;
}

.back-link {
  display: inline-block;
  font-size: 13px;
  color: var(--fg-faint);
  text-decoration: none;
  margin-bottom: 32px;
  transition: color 0.15s;
}

.back-link:hover {
  color: var(--fg-dim);
}

h1 {
  color: var(--fg);
  font-size: 24px;
  font-weight: 700;
  margin-bottom: 8px;
  letter-spacing: 0.01em;
}

.last-updated {
  font-size: 12px;
  color: var(--fg-faint);
  margin-bottom: 32px;
}

h2 {
  color: var(--fg);
  font-size: 16px;
  font-weight: 600;
  margin-top: 36px;
  margin-bottom: 14px;
  padding-top: 8px;
}

h3 {
  color: var(--fg);
  font-size: 14px;
  font-weight: 600;
  margin-top: 24px;
  margin-bottom: 10px;
}

p {
  margin-bottom: 14px;
}

ul, ol {
  margin-left: 20px;
  margin-bottom: 14px;
}

li {
  margin-bottom: 6px;
}

.divider {
  border: none;
  border-top: 1px solid var(--border);
  margin: 36px 0;
}

table {
  width: 100%;
  border-collapse: collapse;
  margin: 16px 0;
  font-size: 13px;
}

table th, table td {
  padding: 10px 12px;
  text-align: left;
  border-bottom: 1px solid var(--border);
}

table th {
  color: var(--fg);
  font-weight: 600;
  background: var(--accent);
}

a {
  color: rgba(120, 180, 255, 0.9);
  text-decoration: none;
  border-bottom: 1px solid rgba(120, 180, 255, 0.3);
}

a:hover {
  color: rgba(150, 200, 255, 1);
  border-bottom-color: rgba(150, 200, 255, 0.6);
}

footer {
  margin-top: 60px;
  padding-top: 24px;
  border-top: 1px solid var(--border);
  text-align: center;
  font-size: 11px;
  color: var(--fg-faint);
}

strong {
  color: var(--fg);
  font-weight: 600;
}

@media (max-width: 480px) {
  .container {
    padding: 32px 20px 60px;
  }
  h1 {
    font-size: 20px;
  }
  h2 {
    font-size: 15px;
  }
  body {
    font-size: 13px;
  }
}