:root {
  --bg: #0a1622;
  --bg2: #0f1f2e;
  --text: #eef4fa;
  --dim: #9fb0c0;
  --accent: #3da7f0;
  --border: rgba(255, 255, 255, 0.10);
}
* { box-sizing: border-box; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 16px/1.7 -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}
a { color: var(--accent); }

.site-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  padding: 14px 22px;
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  background: rgba(10, 22, 34, 0.92);
  backdrop-filter: blur(8px);
}
.brand {
  font-weight: 800;
  font-size: 18px;
  color: var(--text);
  text-decoration: none;
  letter-spacing: -0.3px;
}
.lang-toggle { font-size: 14px; color: var(--accent); text-decoration: none; }

main.doc { max-width: 820px; margin: 0 auto; padding: 32px 22px 56px; }
.doc h1 { font-size: 28px; line-height: 1.25; margin: 0 0 10px; letter-spacing: -0.4px; }
.doc h2 {
  font-size: 20px;
  margin: 34px 0 10px;
  padding-top: 14px;
  border-top: 1px solid var(--border);
}
.doc h3 { font-size: 16px; margin: 22px 0 8px; color: #cdd9e5; }
.doc p, .doc li { color: #dbe5ee; }
.doc strong { color: #fff; }
.doc blockquote {
  margin: 16px 0;
  padding: 12px 16px;
  background: var(--bg2);
  border-left: 3px solid var(--accent);
  border-radius: 8px;
  color: var(--dim);
}
.doc table { width: 100%; border-collapse: collapse; margin: 16px 0; font-size: 14px; }
.doc th, .doc td { border: 1px solid var(--border); padding: 9px 12px; text-align: left; vertical-align: top; }
.doc th { background: var(--bg2); color: #cdd9e5; }
.doc hr { border: 0; border-top: 1px solid var(--border); margin: 28px 0; }
.doc code { background: var(--bg2); padding: 2px 6px; border-radius: 5px; font-size: 14px; }

.site-footer {
  max-width: 820px;
  margin: 0 auto;
  padding: 22px 22px 48px;
  border-top: 1px solid var(--border);
  color: var(--dim);
  font-size: 13px;
}
.site-footer a { color: var(--dim); margin: 0 4px; }

@media (max-width: 600px) {
  main.doc { padding: 22px 16px 44px; }
  .doc h1 { font-size: 24px; }
  .doc table { font-size: 13px; }
}