:root {
  --bg: #f7f7f4;
  --band: #efeee9;
  --card: #f7f7f4;
  --fg: #16181d;
  --muted: #5d6270;
  --line: #dcdbd4;
  --accent: #0f8a5f;
  --accent-fg: #ffffff;
  --term-bg: #0d1117;
  --term-fg: #d6dbe3;
  --term-line: #232a35;
  --term-dim: #6b7586;
  --up: #3ddc97;
  --dn: #ff6b6b;
  --warn: #f2c14e;
  --cmd: #8ab4ff;
  --sans: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --mono: ui-monospace, "SF Mono", "JetBrains Mono", "Cascadia Mono", Menlo, Consolas, "DejaVu Sans Mono", monospace;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0b0e13;
    --band: #10141b;
    --card: #0b0e13;
    --fg: #e6e9ef;
    --muted: #98a0ae;
    --line: #1f2530;
    --accent: #3ddc97;
    --accent-fg: #06110c;
    --term-bg: #080b10;
    --term-line: #1c222c;
  }
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; background: var(--bg); color: var(--fg); font: 16px/1.6 var(--sans); -webkit-font-smoothing: antialiased; }
a { color: inherit; }
.wrap { max-width: 1180px; margin: 0 auto; padding: 0 24px; }
.mono, code { font-family: var(--mono); font-size: 0.9em; }
p code, li code { background: color-mix(in srgb, var(--muted) 14%, transparent); padding: 1px 5px; border-radius: 4px; }

.nav { position: sticky; top: 0; z-index: 10; background: color-mix(in srgb, var(--bg) 88%, transparent); backdrop-filter: blur(8px); border-bottom: 1px solid var(--line); }
.nav-in { display: flex; align-items: center; justify-content: space-between; height: 56px; gap: 16px; }
.brand { display: flex; align-items: center; gap: 8px; text-decoration: none; font: 600 18px var(--mono); letter-spacing: -0.02em; }
.nav nav { display: flex; gap: 20px; font-size: 14px; }
.nav nav a { text-decoration: none; color: var(--muted); }
.nav nav a:hover { color: var(--fg); }
.nav nav a.gh { color: var(--fg); font-weight: 600; }

.hero { padding: 72px 24px 56px; }
.kicker { font: 500 13px var(--mono); color: var(--accent); margin: 0 0 18px; letter-spacing: 0.02em; }
h1 { font-size: clamp(40px, 7vw, 76px); line-height: 1.08; letter-spacing: -0.035em; margin: 0 0 22px; font-weight: 750; max-width: 980px; text-wrap: balance; }
h2 { font-size: clamp(28px, 4vw, 42px); line-height: 1.12; letter-spacing: -0.025em; margin: 0 0 18px; }
h3 { font-size: 19px; margin: 0 0 8px; letter-spacing: -0.01em; }
.lead { font-size: clamp(18px, 2vw, 21px); color: var(--muted); max-width: 820px; margin: 0 0 28px; }
.note { color: var(--muted); font-size: 14px; max-width: 820px; }
.cta { display: flex; gap: 12px; flex-wrap: wrap; margin-bottom: 36px; }
.btn { display: inline-block; padding: 11px 20px; border-radius: 8px; border: 1px solid var(--line); background: transparent; color: var(--fg); text-decoration: none; font: 600 15px var(--sans); cursor: pointer; }
.btn:hover { border-color: var(--muted); }
.btn.primary { background: var(--accent); color: var(--accent-fg); border-color: var(--accent); }
.joke blockquote { margin: 28px 0 0; padding: 2px 0 2px 18px; border-left: 3px solid var(--accent); color: var(--muted); max-width: 820px; font-size: 15px; }
.joke p { margin: 0; }

section { padding: 72px 0; }
.band { background: var(--band); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
section .wrap > p { color: var(--muted); max-width: 820px; }
.copy p { color: var(--muted); }

.cards { display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap: 16px; margin: 28px 0 8px; }
.cards article { border: 1px solid var(--line); border-radius: 12px; padding: 20px; background: var(--card); display: flex; flex-direction: column; }
.cards article h3 code { font-size: 1em; background: none; padding: 0; }
.cards article p { color: var(--muted); font-size: 15px; margin: 0; flex: 1; }
.cards article p.ex { flex: 0; margin-top: 14px; }
.cards article p.ex code { background: none; padding: 0; color: var(--accent); font-size: 12.5px; }

.duo { display: grid; grid-template-columns: minmax(240px, 320px) minmax(0, 1fr); gap: 36px; align-items: start; margin-top: 48px; }
.duo .copy { position: sticky; top: 80px; }
.stack { display: grid; gap: 16px; min-width: 0; }

.term { margin: 0; background: var(--term-bg); color: var(--term-fg); border: 1px solid var(--term-line); border-radius: 12px; overflow: hidden; min-width: 0; box-shadow: 0 18px 50px -24px rgba(0, 0, 0, 0.45); }
.term figcaption { display: flex; align-items: center; gap: 7px; padding: 10px 14px; border-bottom: 1px solid var(--term-line); font: 12px var(--mono); color: var(--term-dim); white-space: nowrap; overflow: hidden; }
.term figcaption i { flex: none; width: 10px; height: 10px; border-radius: 50%; background: #2a3240; display: inline-block; }
.term figcaption span { margin-left: 8px; overflow: hidden; text-overflow: ellipsis; }
/* Full output, in a box of limited height that scrolls inside. */
.term pre { margin: 0; padding: 16px 18px 18px; max-height: 460px; overflow: auto; font: 12.5px/1.5 var(--mono); white-space: pre; tab-size: 4; }
.hero .term pre { max-height: 560px; }
.term .p { color: var(--up); }
.term .cmd { color: var(--cmd); }
.term .h { color: #ffffff; font-weight: 700; }
.term .up { color: var(--up); }
.term .dn { color: var(--dn); }
.term .warn { color: var(--warn); }
.term .dim { color: var(--term-dim); }
/* One character cell per glyph, whatever font draws it, so text columns stay aligned. */
.term .g, .term .s { display: inline-block; width: 1ch; height: 1.5em; line-height: 1.5em; vertical-align: top; text-align: center; }
.term .g { overflow: hidden; }

.copybox { position: relative; margin: 8px 0 24px; max-width: 900px; }
.copybox pre { margin: 0; background: var(--term-bg); color: var(--term-fg); border: 1px solid var(--term-line); border-radius: 12px; padding: 18px 90px 18px 18px; font: 13.5px/1.6 var(--mono); white-space: pre-wrap; word-break: break-word; }
.copybox button { position: absolute; top: 12px; right: 12px; font: 600 13px var(--sans); padding: 6px 12px; border-radius: 6px; border: 1px solid var(--term-line); background: #1a212c; color: var(--term-fg); cursor: pointer; }
.copybox button:hover { background: #232c3a; }

.foot { display: flex; justify-content: space-between; flex-wrap: wrap; gap: 12px; padding: 32px 24px 48px; color: var(--muted); font-size: 14px; }

@media (max-width: 960px) {
  .duo { grid-template-columns: minmax(0, 1fr); gap: 16px; }
  .duo .copy { position: static; }
  .nav nav a.md { display: none; }
}

@media (max-width: 640px) {
  .wrap { padding: 0 16px; }
  .hero { padding: 48px 16px 40px; }
  section { padding: 52px 0; }
  .nav nav a:not(.gh):not(.lang) { display: none; }
  .term pre { font-size: 11.5px; max-height: 420px; }
  .foot { padding: 28px 16px 40px; }
}