:root {
  --bg: #0c1118;
  --panel: #151c27;
  --line: #243044;
  --text: #e8eef7;
  --muted: #8b9bb0;
  --accent: #6aa6ff;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 16px/1.75 "IBM Plex Sans", "Vazirmatn", sans-serif;
}

.top {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  gap: 24px;
  padding: 22px 28px 16px;
  border-bottom: 1px solid var(--line);
  position: sticky;
  top: 0;
  background: var(--bg);
  z-index: 2;
}

h1 { margin: 0 0 4px; font-size: 22px; }
.muted { margin: 0; color: var(--muted); }

.tabs { display: flex; gap: 8px; flex-wrap: wrap; }

.tab {
  border: 1px solid var(--line);
  background: var(--panel);
  color: var(--text);
  text-decoration: none;
  padding: 6px 12px;
  border-radius: 8px;
}

.tab.on { border-color: var(--accent); color: var(--accent); }

main { max-width: 920px; margin: 0 auto; padding: 28px 24px 80px; }

.cards { display: grid; gap: 16px; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); }

.card {
  display: block;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 20px;
  color: inherit;
  text-decoration: none;
}

.card h2 { margin: 0 0 8px; font-size: 18px; }
.card p { margin: 0; color: var(--muted); }

.doc h1 { font-size: 28px; line-height: 1.4; margin: 0 0 16px; }
.doc h2 { font-size: 20px; margin: 36px 0 12px; padding-top: 8px; }
.doc h3 { font-size: 17px; margin: 28px 0 10px; }
.doc p { margin: 0 0 12px; }
.doc a { color: var(--accent); }
.doc ul, .doc ol { padding-inline-start: 22px; }
.doc li { margin: 4px 0; }
.doc blockquote {
  margin: 12px 0;
  padding: 10px 14px;
  border-inline-start: 3px solid var(--accent);
  background: var(--panel);
  color: var(--muted);
}
.doc pre {
  background: #0a0e14;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 12px 14px;
  overflow: auto;
  font-size: 13px;
  line-height: 1.5;
}
.doc code { font-family: ui-monospace, "IBM Plex Mono", monospace; font-size: 0.92em; }
.doc :not(pre) > code {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 4px;
  padding: 0 5px;
}
.doc table { border-collapse: collapse; width: 100%; margin: 16px 0; font-size: 14px; }
.doc th, .doc td { border: 1px solid var(--line); padding: 8px 10px; text-align: start; vertical-align: top; }
.doc th { background: var(--panel); }
.doc hr { border: 0; border-top: 1px solid var(--line); margin: 28px 0; }