:root {
  --bg: #09090f;
  --surface: #13131a;
  --text: #e8e8ec;
  --muted: #7a7a85;
  --border: #2a2a35;
  --accent: #f5a524;
  --danger: #ef4444;
  --mono: ui-monospace, "JetBrains Mono", "SFMono-Regular", Menlo, Consolas, monospace;
  --sans: "Inter", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

main { max-width: 720px; margin: 0 auto; padding: 64px 24px 96px; }

a { color: var(--text); text-decoration: underline; text-underline-offset: 3px; text-decoration-color: var(--border); transition: text-decoration-color 0.15s; }
a:hover { text-decoration-color: var(--accent); }

h1, h2, h3 { font-weight: 600; letter-spacing: -0.01em; line-height: 1.25; }
h1 { font-size: 28px; margin: 0 0 12px; }
h2 { font-size: 20px; margin: 56px 0 16px; padding-top: 24px; border-top: 1px solid var(--border); }
h3 { font-size: 16px; margin: 24px 0 8px; }

p { margin: 0 0 16px; }
.muted { color: var(--muted); font-size: 14px; }
.tagline { color: var(--muted); font-size: 17px; margin: 0 0 32px; max-width: 60ch; }

.topbar { display: flex; justify-content: space-between; align-items: center; margin-bottom: 48px; font-size: 14px; }
.brand { font-family: var(--mono); color: var(--muted); }
.brand b { color: var(--text); font-weight: 500; }
.lang-switch { font-family: "Vazirmatn", var(--sans); color: var(--muted); text-decoration: none; padding: 4px 10px; border: 1px solid var(--border); border-radius: 6px; }
.lang-switch:hover { color: var(--accent); border-color: var(--accent); }

.cta, .cta-secondary { display: inline-block; padding: 13px 22px; border-radius: 6px; text-decoration: none; font-size: 15px; min-height: 44px; line-height: 1.2; }
.cta { background: var(--accent); color: var(--bg); font-weight: 600; }
.cta:hover { background: #ffb738; text-decoration: none; }
.cta-secondary { border: 1px solid var(--border); margin-inline-start: 8px; }
.cta-secondary:hover { border-color: var(--text); }

pre, code { font-family: var(--mono); font-size: 13.5px; }
pre { background: var(--surface); border: 1px solid var(--border); border-radius: 6px; padding: 14px 16px; overflow-x: auto; margin: 12px 0 20px; }
p code, li code { background: var(--surface); border: 1px solid var(--border); padding: 1px 6px; border-radius: 4px; font-size: 12.5px; }
pre code { background: transparent; border: none; padding: 0; }

ol, ul { padding-inline-start: 22px; margin: 0 0 16px; }
li { margin: 6px 0; }

table { width: 100%; border-collapse: collapse; margin: 12px 0 20px; font-size: 14px; }
th, td { text-align: start; padding: 10px 12px; border-bottom: 1px solid var(--border); }
th { color: var(--muted); font-weight: 500; font-size: 13px; text-transform: uppercase; letter-spacing: 0.04em; }
td.num { font-family: var(--mono); color: var(--accent); }

.warn { border: 1px solid var(--border); border-inline-start: 3px solid var(--danger); background: var(--surface); padding: 14px 16px; border-radius: 6px; margin: 16px 0 24px; font-size: 14.5px; }
.warn strong { color: var(--danger); }

.note { border: 1px solid var(--border); background: var(--surface); padding: 14px 16px; border-radius: 6px; margin: 16px 0 24px; font-size: 14.5px; }

footer { margin-top: 80px; padding-top: 24px; border-top: 1px solid var(--border); color: var(--muted); font-size: 13px; text-align: center; }
footer a { color: var(--muted); }

[dir="rtl"] body { font-family: "Vazirmatn", var(--sans); }
[dir="rtl"] pre, [dir="rtl"] code { font-family: var(--mono); direction: ltr; text-align: left; }
[dir="rtl"] .lang-switch { font-family: "Inter", var(--sans); }
[dir="rtl"] td.num { direction: rtl; text-align: end; }
[dir="rtl"] h1, [dir="rtl"] h2, [dir="rtl"] h3 { letter-spacing: 0; }
[dir="rtl"] ol { list-style-type: persian; }