/* ═══════════════════════════════════════════════════════════════════════════
   masqueradarr — documentation design system
   Ported and generalized from .claude/artifacts/hls-ts.html.

   3-layer theming, verbatim pattern: :root is the light default → dark under
   @media(prefers-color-scheme:dark) → :root[data-theme] overrides so the
   in-page toggle wins in either direction.

   The artifact's HLS teal (hue 230) becomes the single brand accent (--accent);
   the brand teal #48D7FE == oklch(.81 .11 230). The green (--ts, hue 150),
   amber (--cfg) and red (--risk) stay as page-scoped / semantic tokens — the
   teal↔green duo is used only on the Video Proxy Engine page's HLS/TS story.
   ═══════════════════════════════════════════════════════════════════════════ */

:root {
  --bg-0: oklch(0.985 0.003 240);
  --bg-1: oklch(1 0 0);
  --bg-2: oklch(0.965 0.004 240);
  --bg-3: oklch(0.935 0.005 240);
  --hairline: oklch(0 0 0 / 0.09);
  --hairline-strong: oklch(0 0 0 / 0.15);
  --text-0: oklch(0.18 0.01 240);
  --text-1: oklch(0.33 0.012 240);
  --text-2: oklch(0.50 0.012 240);
  --text-3: oklch(0.62 0.012 240);

  /* Brand accent — teal, hue 230 (== the mark's #48D7FE). */
  --accent: oklch(0.52 0.13 230);
  --accent-hi: oklch(0.44 0.14 230);
  --accent-soft: oklch(0.52 0.13 230 / 0.10);
  --accent-line: oklch(0.52 0.13 230 / 0.30);

  /* Green — Raw TS / "good" (hue 150). Page-scoped. */
  --ts: oklch(0.46 0.16 150);
  --ts-hi: oklch(0.39 0.16 150);
  --ts-soft: oklch(0.46 0.16 150 / 0.10);
  --ts-line: oklch(0.46 0.16 150 / 0.30);

  /* Amber — control-plane / "warn". */
  --cfg: oklch(0.54 0.15 62);
  --cfg-soft: oklch(0.54 0.15 62 / 0.12);
  --cfg-line: oklch(0.54 0.15 62 / 0.30);
  /* Red — risk / critical only. */
  --risk: oklch(0.52 0.20 25);
  --risk-soft: oklch(0.52 0.20 25 / 0.10);
  --risk-line: oklch(0.52 0.20 25 / 0.30);

  /* Semantic aliases (content uses these; diagrams use the raw hues above). */
  --good: var(--ts);
  --good-hi: var(--ts-hi);
  --warn: var(--cfg);
  --bad: var(--risk);

  --radius-s: 8px;
  --radius-m: 12px;
  --radius-l: 16px;
  --shadow: 0 1px 2px oklch(0 0 0 / 0.06), 0 12px 34px oklch(0 0 0 / 0.07);

  --sans: "Space Grotesk", ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --mono: "JetBrains Mono", ui-monospace, "SF Mono", "Cascadia Mono", Menlo, Consolas, monospace;

  --measure: 68ch;
  --wide: 880px;
  --side-w: 272px;
  --toc-w: 208px;
  --signal-h: 3px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg-0: oklch(0.16 0.005 240);
    --bg-1: oklch(0.20 0.006 240);
    --bg-2: oklch(0.235 0.008 240);
    --bg-3: oklch(0.28 0.010 240);
    --hairline: oklch(1 0 0 / 0.08);
    --hairline-strong: oklch(1 0 0 / 0.14);
    --text-0: oklch(0.98 0 0);
    --text-1: oklch(0.78 0.01 240);
    --text-2: oklch(0.60 0.012 240);
    --text-3: oklch(0.45 0.012 240);

    --accent: oklch(0.81 0.11 230);
    --accent-hi: oklch(0.88 0.11 230);
    --accent-soft: oklch(0.81 0.11 230 / 0.15);
    --accent-line: oklch(0.81 0.11 230 / 0.34);

    --ts: oklch(0.80 0.15 150);
    --ts-hi: oklch(0.87 0.15 150);
    --ts-soft: oklch(0.80 0.15 150 / 0.15);
    --ts-line: oklch(0.80 0.15 150 / 0.34);

    --cfg: oklch(0.83 0.14 82);
    --cfg-soft: oklch(0.83 0.14 82 / 0.16);
    --cfg-line: oklch(0.83 0.14 82 / 0.34);
    --risk: oklch(0.70 0.17 28);
    --risk-soft: oklch(0.70 0.17 28 / 0.15);
    --risk-line: oklch(0.70 0.17 28 / 0.34);

    --shadow: 0 1px 2px oklch(0 0 0 / 0.4), 0 18px 44px oklch(0 0 0 / 0.5);
  }
}

/* Toggle overrides — must beat the media query both ways. */
:root[data-theme="light"] {
  --bg-0: oklch(0.985 0.003 240); --bg-1: oklch(1 0 0); --bg-2: oklch(0.965 0.004 240); --bg-3: oklch(0.935 0.005 240);
  --hairline: oklch(0 0 0 / 0.09); --hairline-strong: oklch(0 0 0 / 0.15);
  --text-0: oklch(0.18 0.01 240); --text-1: oklch(0.33 0.012 240); --text-2: oklch(0.50 0.012 240); --text-3: oklch(0.62 0.012 240);
  --accent: oklch(0.52 0.13 230); --accent-hi: oklch(0.44 0.14 230); --accent-soft: oklch(0.52 0.13 230 / 0.10); --accent-line: oklch(0.52 0.13 230 / 0.30);
  --ts: oklch(0.46 0.16 150); --ts-hi: oklch(0.39 0.16 150); --ts-soft: oklch(0.46 0.16 150 / 0.10); --ts-line: oklch(0.46 0.16 150 / 0.30);
  --cfg: oklch(0.54 0.15 62); --cfg-soft: oklch(0.54 0.15 62 / 0.12); --cfg-line: oklch(0.54 0.15 62 / 0.30);
  --risk: oklch(0.52 0.20 25); --risk-soft: oklch(0.52 0.20 25 / 0.10); --risk-line: oklch(0.52 0.20 25 / 0.30);
  --shadow: 0 1px 2px oklch(0 0 0 / 0.06), 0 12px 34px oklch(0 0 0 / 0.07);
}
:root[data-theme="dark"] {
  --bg-0: oklch(0.16 0.005 240); --bg-1: oklch(0.20 0.006 240); --bg-2: oklch(0.235 0.008 240); --bg-3: oklch(0.28 0.010 240);
  --hairline: oklch(1 0 0 / 0.08); --hairline-strong: oklch(1 0 0 / 0.14);
  --text-0: oklch(0.98 0 0); --text-1: oklch(0.78 0.01 240); --text-2: oklch(0.60 0.012 240); --text-3: oklch(0.45 0.012 240);
  --accent: oklch(0.81 0.11 230); --accent-hi: oklch(0.88 0.11 230); --accent-soft: oklch(0.81 0.11 230 / 0.15); --accent-line: oklch(0.81 0.11 230 / 0.34);
  --ts: oklch(0.80 0.15 150); --ts-hi: oklch(0.87 0.15 150); --ts-soft: oklch(0.80 0.15 150 / 0.15); --ts-line: oklch(0.80 0.15 150 / 0.34);
  --cfg: oklch(0.83 0.14 82); --cfg-soft: oklch(0.83 0.14 82 / 0.16); --cfg-line: oklch(0.83 0.14 82 / 0.34);
  --risk: oklch(0.70 0.17 28); --risk-soft: oklch(0.70 0.17 28 / 0.15); --risk-line: oklch(0.70 0.17 28 / 0.34);
  --shadow: 0 1px 2px oklch(0 0 0 / 0.4), 0 18px 44px oklch(0 0 0 / 0.5);
}

/* ── reset ─────────────────────────────────────────────────────────────── */
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background:
    radial-gradient(120% 60% at 50% -8%, var(--accent-soft), transparent 60%),
    var(--bg-0);
  color: var(--text-1);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}
img { max-width: 100%; display: block; }
a { color: var(--accent-hi); text-decoration-color: var(--accent-line); text-underline-offset: 3px; }
a:hover { text-decoration-color: var(--accent); }

/* ── signal bar ────────────────────────────────────────────────────────── */
.signal {
  position: sticky; top: 0; z-index: 45;
  height: var(--signal-h); width: 100%;
  background: linear-gradient(90deg, transparent, var(--accent) 20%, var(--ts) 50%, var(--accent) 80%, transparent);
  background-size: 220% 100%;
  animation: sweep 7s linear infinite;
  opacity: 0.9;
}
@keyframes sweep { to { background-position: -220% 0; } }

/* ── layout shell ──────────────────────────────────────────────────────── */
.shell {
  display: grid;
  grid-template-columns: var(--side-w) minmax(0, 1fr) var(--toc-w);
  align-items: start;
}
.content { min-width: 0; padding: 40px clamp(20px, 4vw, 56px) 96px; }
.doc { max-width: var(--wide); margin: 0 auto; }
.col { max-width: var(--measure); }

/* ── sidebar ───────────────────────────────────────────────────────────── */
.sidebar {
  position: sticky; top: var(--signal-h);
  height: calc(100vh - var(--signal-h));
  overflow-y: auto; overscroll-behavior: contain;
  border-right: 1px solid var(--hairline);
  background: color-mix(in oklch, var(--bg-1) 55%, transparent);
  backdrop-filter: blur(6px);
  padding: 22px 16px 20px;
  display: flex; flex-direction: column; gap: 18px;
}
.side-brand { display: flex; align-items: center; gap: 10px; padding: 2px 6px 4px; color: var(--accent); text-decoration: none; }
.side-brand svg { flex: none; }
.side-brand .wm { font-weight: 600; letter-spacing: -0.03em; font-size: 20px; color: var(--text-0); text-transform: lowercase; }
.side-brand .wm b { color: var(--accent-hi); font-weight: 600; }
.side-brand small { display: block; font-family: var(--mono); font-size: 9.5px; letter-spacing: 0.22em; text-transform: uppercase; color: var(--text-3); margin-top: 2px; }

.side-nav { display: flex; flex-direction: column; gap: 16px; flex: 1; }
.nav-group { display: flex; flex-direction: column; gap: 2px; }
.nav-group > .g-label { font-family: var(--mono); font-size: 10px; letter-spacing: 0.18em; text-transform: uppercase; color: var(--text-3); padding: 4px 10px 6px; }
.nav-link {
  display: flex; align-items: center; gap: 9px;
  padding: 7px 10px; border-radius: var(--radius-s);
  color: var(--text-1); text-decoration: none; font-size: 14px; font-weight: 500;
  line-height: 1.25; position: relative;
}
.nav-link:hover { background: var(--bg-2); color: var(--text-0); }
.nav-link .ix { font-family: var(--mono); font-size: 10.5px; color: var(--text-3); min-width: 16px; text-align: right; }
.nav-link[aria-current="page"] { background: var(--accent-soft); color: var(--accent-hi); }
.nav-link[aria-current="page"] .ix { color: var(--accent); }
.nav-link[aria-current="page"]::before { content: ""; position: absolute; left: -16px; top: 8px; bottom: 8px; width: 3px; border-radius: 2px; background: var(--accent); }
.nav-link.soon { color: var(--text-3); cursor: default; pointer-events: none; }
.nav-link .soon-tag { margin-left: auto; font-family: var(--mono); font-size: 8.5px; letter-spacing: 0.12em; text-transform: uppercase; color: var(--text-3); border: 1px solid var(--hairline); padding: 1px 5px; border-radius: 999px; }

.side-foot { display: flex; align-items: center; justify-content: space-between; gap: 8px; padding-top: 14px; border-top: 1px solid var(--hairline); }
.side-foot .repo { font-family: var(--mono); font-size: 11px; color: var(--text-3); text-decoration: none; }
.side-foot .repo:hover { color: var(--accent-hi); }

/* theme toggle button */
.theme-toggle {
  display: inline-flex; align-items: center; justify-content: center;
  width: 34px; height: 34px; border-radius: var(--radius-s);
  border: 1px solid var(--hairline); background: var(--bg-1); color: var(--text-2);
  cursor: pointer; font-size: 15px; line-height: 1; transition: color .15s, border-color .15s;
}
.theme-toggle:hover { color: var(--accent-hi); border-color: var(--accent-line); }
.theme-toggle .i-sun { display: none; }
.theme-toggle .i-moon { display: inline; }
:root[data-theme="dark"] .theme-toggle .i-sun,
.theme-toggle[data-resolved="dark"] .i-sun { display: inline; }
:root[data-theme="dark"] .theme-toggle .i-moon,
.theme-toggle[data-resolved="dark"] .i-moon { display: none; }

/* ── mobile topbar + drawer ────────────────────────────────────────────── */
.topbar {
  display: none;
  position: sticky; top: var(--signal-h); z-index: 40;
  align-items: center; gap: 12px;
  padding: 10px 16px; border-bottom: 1px solid var(--hairline);
  background: color-mix(in oklch, var(--bg-0) 80%, transparent);
  backdrop-filter: blur(8px);
}
.topbar .hamburger { display: inline-flex; align-items: center; justify-content: center; width: 36px; height: 36px; border-radius: var(--radius-s); border: 1px solid var(--hairline); background: var(--bg-1); color: var(--text-1); cursor: pointer; }
.topbar .hamburger svg { width: 18px; height: 18px; }
.topbar .tb-brand { display: flex; align-items: center; gap: 8px; color: var(--accent); text-decoration: none; }
.topbar .tb-brand .wm { color: var(--text-0); font-weight: 600; letter-spacing: -0.03em; font-size: 16px; text-transform: lowercase; }
.topbar .spacer { flex: 1; }
.scrim { position: fixed; inset: 0; z-index: 55; background: oklch(0 0 0 / 0.5); opacity: 0; visibility: hidden; transition: opacity .2s; }

/* ── page masthead ─────────────────────────────────────────────────────── */
.page-head { padding: 8px 0 24px; }
.eyebrow {
  font-family: var(--mono); font-size: 11px; letter-spacing: 0.22em;
  text-transform: uppercase; color: var(--text-3);
  display: flex; align-items: center; gap: 10px;
}
.eyebrow b { color: var(--accent-hi); font-weight: 500; }
.eyebrow .rule { flex: 1; height: 1px; background: var(--hairline); }

h1 {
  font-family: var(--sans); font-weight: 680; letter-spacing: -0.02em;
  line-height: 1.08; text-wrap: balance; color: var(--text-0);
  font-size: clamp(30px, 5vw, 46px); margin: 16px 0 14px;
}
h1 .em { color: var(--accent-hi); }
.lede { font-size: clamp(16px, 2vw, 19px); color: var(--text-2); max-width: 62ch; }

/* ── section scaffold ──────────────────────────────────────────────────── */
section { padding-top: 46px; scroll-margin-top: 72px; }
.sec-tag {
  font-family: var(--mono); font-size: 11px; letter-spacing: 0.2em;
  text-transform: uppercase; color: var(--text-3);
  display: flex; align-items: center; gap: 10px; margin-bottom: 14px;
}
.sec-tag .n { color: var(--accent); }
h2 {
  font-family: var(--sans); font-weight: 640; letter-spacing: -0.015em;
  color: var(--text-0); font-size: clamp(21px, 3vw, 27px);
  margin: 0 0 12px; text-wrap: balance; line-height: 1.18;
}
h3 { font-size: 16px; font-weight: 620; color: var(--text-0); margin: 18px 0 6px; letter-spacing: -0.01em; }
p { margin: 0 0 14px; }
.col p, .col ul { max-width: var(--measure); }
strong { color: var(--text-0); font-weight: 620; }
em { font-style: italic; }

code, .mono { font-family: var(--mono); }
code {
  font-size: 0.85em; background: var(--bg-2); border: 1px solid var(--hairline);
  padding: 0.08em 0.4em; border-radius: 5px; color: var(--text-0); white-space: nowrap;
}
.k-accent code { color: var(--accent-hi); border-color: var(--accent-line); background: var(--accent-soft); }
.k-ts code { color: var(--ts-hi); border-color: var(--ts-line); background: var(--ts-soft); }

ul, ol { padding-left: 0; list-style: none; margin: 0 0 14px; }
ul li { position: relative; padding-left: 22px; margin-bottom: 8px; }
ul li::before { content: ""; position: absolute; left: 4px; top: 0.62em; width: 6px; height: 6px; border-radius: 2px; background: var(--accent); opacity: 0.75; }
ol { counter-reset: li; }
ol li { position: relative; padding-left: 30px; margin-bottom: 10px; counter-increment: li; }
ol li::before { content: counter(li); position: absolute; left: 0; top: 0.05em; width: 20px; height: 20px; border-radius: 50%; background: var(--accent-soft); color: var(--accent-hi); border: 1px solid var(--accent-line); font-family: var(--mono); font-size: 11px; display: grid; place-items: center; }

/* ── panels ────────────────────────────────────────────────────────────── */
.panel { background: var(--bg-1); border: 1px solid var(--hairline); border-radius: var(--radius-l); box-shadow: var(--shadow); }
.panel-head {
  display: flex; align-items: center; gap: 10px;
  padding: 12px 16px; border-bottom: 1px solid var(--hairline);
  font-family: var(--mono); font-size: 11px; letter-spacing: 0.16em; text-transform: uppercase; color: var(--text-3);
}
.panel-head .dot { width: 7px; height: 7px; border-radius: 50%; flex: none; }
.panel-head .rt { margin-left: auto; text-transform: none; letter-spacing: 0.04em; }
.scroll { overflow-x: auto; }

/* ── feature cards / TL;DR pair ────────────────────────────────────────── */
.pair { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; margin-top: 8px; }
@media (max-width: 720px) { .pair { grid-template-columns: 1fr; } }
.fcard { padding: 20px 20px 22px; border-radius: var(--radius-l); border: 1px solid var(--hairline); background: var(--bg-1); position: relative; overflow: hidden; }
.fcard::before { content: ""; position: absolute; inset: 0 auto 0 0; width: 3px; background: var(--accent); }
.fcard.accent::before { background: var(--accent); }
.fcard.ts::before { background: var(--ts); }
.fcard.warn::before { background: var(--cfg); }
.fcard.risk::before { background: var(--risk); }
.fcard .badge { font-family: var(--mono); font-size: 11px; letter-spacing: 0.14em; text-transform: uppercase; display: inline-flex; align-items: center; gap: 7px; padding: 4px 9px; border-radius: 999px; margin-bottom: 12px; color: var(--accent-hi); background: var(--accent-soft); border: 1px solid var(--accent-line); }
.fcard.ts .badge { color: var(--ts-hi); background: var(--ts-soft); border-color: var(--ts-line); }
.fcard.warn .badge { color: var(--cfg); background: var(--cfg-soft); border-color: var(--cfg-line); }
.fcard.risk .badge { color: var(--risk); background: var(--risk-soft); border-color: var(--risk-line); }
.fcard h3 { font-size: 18px; margin: 0 0 8px; }
.fcard p { color: var(--text-2); margin: 0; font-size: 15px; }
.fcard p + p { margin-top: 9px; }
.fcard .one { font-size: 15.5px; color: var(--text-1); }
.fcard ul { margin: 10px 0 0; }
.fcard ul li { font-size: 14px; color: var(--text-2); }

/* ── tiles / analogy ───────────────────────────────────────────────────── */
.analogy { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
@media (max-width: 720px) { .analogy { grid-template-columns: 1fr; } }
.tile { padding: 18px 20px; border-radius: var(--radius-m); border: 1px solid var(--hairline); background: var(--bg-1); }
.tile .ic { font-family: var(--mono); font-size: 11px; letter-spacing: 0.12em; text-transform: uppercase; margin-bottom: 10px; color: var(--accent-hi); }
.tile.ts .ic { color: var(--ts-hi); }
.tile h3 { margin: 0 0 6px; }
.tile p { font-size: 14.5px; color: var(--text-2); margin: 0; }
.tile p + p { margin-top: 9px; }

/* ── glossary (definition grid) ────────────────────────────────────────── */
.glossary { display: grid; gap: 0; }
.gloss { display: grid; grid-template-columns: 190px 1fr; gap: 8px 22px; padding: 16px 4px; border-top: 1px solid var(--hairline); }
.glossary .gloss:first-child { border-top: 0; }
.gloss dt { color: var(--text-0); font-weight: 600; letter-spacing: -0.01em; }
.gloss dt .abbr { display: block; font-family: var(--mono); font-size: 10.5px; letter-spacing: 0.1em; text-transform: uppercase; color: var(--accent-hi); margin-top: 3px; font-weight: 500; }
.gloss dd { margin: 0; color: var(--text-2); font-size: 15px; }
@media (max-width: 620px) { .gloss { grid-template-columns: 1fr; gap: 4px; } }

/* ── aha / note-block / refs ───────────────────────────────────────────── */
.aha { border-left: 3px solid var(--cfg); background: var(--cfg-soft); border-radius: 0 var(--radius-m) var(--radius-m) 0; padding: 14px 18px; margin: 18px 0 0; max-width: var(--measure); }
.aha .lbl { font-family: var(--mono); font-size: 10.5px; letter-spacing: 0.16em; text-transform: uppercase; color: var(--cfg); }
.aha p { margin: 4px 0 0; font-size: 14.5px; color: var(--text-1); }

.note-block { border: 1px solid var(--risk-line); background: var(--risk-soft); border-radius: var(--radius-m); padding: 16px 18px; max-width: var(--measure); }
.note-block .lbl { font-family: var(--mono); font-size: 10.5px; letter-spacing: 0.16em; text-transform: uppercase; color: var(--risk); }
.note-block p { margin: 6px 0 0; font-size: 14px; color: var(--text-1); }
.note-block p code { white-space: normal; }

.refs { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 14px; }
.ref { font-family: var(--mono); font-size: 11.5px; color: var(--text-2); background: var(--bg-2); border: 1px solid var(--hairline); padding: 6px 10px; border-radius: 7px; }
.ref b { color: var(--text-0); font-weight: 500; }

/* ── code blocks ───────────────────────────────────────────────────────── */
.code-wrap { position: relative; margin: 0 0 14px; }
pre.code {
  font-family: var(--mono); font-size: 13px; line-height: 1.65;
  background: var(--bg-2); border: 1px solid var(--hairline); border-radius: var(--radius-m);
  padding: 14px 16px; margin: 0; overflow-x: auto; color: var(--text-0);
}
pre.code .cmt { color: var(--text-3); }
pre.code .pr { color: var(--accent-hi); user-select: none; }
pre.code .em { color: var(--accent-hi); }
.copy-btn {
  position: absolute; top: 8px; right: 8px;
  font-family: var(--mono); font-size: 10px; letter-spacing: 0.06em; text-transform: uppercase;
  color: var(--text-3); background: var(--bg-1); border: 1px solid var(--hairline);
  border-radius: 6px; padding: 4px 8px; cursor: pointer; opacity: 0; transition: opacity .15s, color .15s;
}
.code-wrap:hover .copy-btn, .copy-btn:focus-visible { opacity: 1; }
.copy-btn:hover { color: var(--accent-hi); border-color: var(--accent-line); }
.copy-btn.done { color: var(--ts-hi); border-color: var(--ts-line); }

/* stacked topology panels get a touch of breathing room */
.panel + .panel.stack { margin-top: 14px; }

/* ── comparison table ──────────────────────────────────────────────────── */
table { border-collapse: collapse; width: 100%; min-width: 560px; font-size: 14px; }
thead th { text-align: left; padding: 14px 16px; font-family: var(--mono); font-size: 11px; letter-spacing: 0.1em; text-transform: uppercase; color: var(--text-3); border-bottom: 1px solid var(--hairline-strong); vertical-align: bottom; }
thead th.h-accent { color: var(--accent-hi); }
thead th.h-ts { color: var(--ts-hi); }
tbody td { padding: 12px 16px; border-bottom: 1px solid var(--hairline); vertical-align: top; color: var(--text-1); }
tbody tr td:first-child { color: var(--text-3); font-family: var(--mono); font-size: 12px; letter-spacing: 0.02em; width: 22%; }
tbody tr:hover td { background: var(--bg-2); }
td .em-accent { color: var(--accent-hi); }
td .em-ts { color: var(--ts-hi); }
td code { white-space: nowrap; }

/* ── topic cards (home) ────────────────────────────────────────────────── */
.cards { display: grid; grid-template-columns: repeat(auto-fill, minmax(230px, 1fr)); gap: 14px; }
.card {
  display: flex; flex-direction: column; gap: 8px;
  padding: 18px 18px 20px; border-radius: var(--radius-l);
  border: 1px solid var(--hairline); background: var(--bg-1);
  text-decoration: none; color: inherit; position: relative; overflow: hidden;
  transition: border-color .15s, transform .15s, box-shadow .15s;
}
a.card:hover { border-color: var(--accent-line); transform: translateY(-2px); box-shadow: var(--shadow); }
.card::before { content: ""; position: absolute; inset: 0 0 auto 0; height: 3px; background: var(--accent); opacity: 0; transition: opacity .15s; }
a.card:hover::before { opacity: 1; }
.card .c-ix { font-family: var(--mono); font-size: 10.5px; letter-spacing: 0.14em; text-transform: uppercase; color: var(--text-3); display: flex; align-items: center; gap: 8px; }
.card .c-ix .n { color: var(--accent); }
.card h3 { margin: 0; font-size: 17px; }
.card p { margin: 0; font-size: 14px; color: var(--text-2); }
.card .go { margin-top: auto; padding-top: 6px; font-family: var(--mono); font-size: 11.5px; color: var(--accent-hi); letter-spacing: 0.02em; }
.card.soon { opacity: 0.72; }
.card.soon .go { color: var(--text-3); }
.card .soon-tag { margin-left: auto; font-family: var(--mono); font-size: 8.5px; letter-spacing: 0.12em; text-transform: uppercase; color: var(--text-3); border: 1px solid var(--hairline); padding: 1px 6px; border-radius: 999px; }

/* ── hero (home) ───────────────────────────────────────────────────────── */
.hero { display: grid; grid-template-columns: 1.15fr 0.85fr; gap: 34px; align-items: center; padding: 20px 0 10px; }
.hero-art { display: grid; place-items: center; }
.hero-art img { width: 100%; max-width: 340px; filter: drop-shadow(0 18px 40px oklch(0 0 0 / 0.28)); }
.hero .cta { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 22px; }
@media (max-width: 860px) { .hero { grid-template-columns: 1fr; gap: 22px; } .hero-art { order: -1; } .hero-art img { max-width: 240px; } }
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 11px 18px; border-radius: var(--radius-m);
  font-weight: 600; font-size: 14.5px; text-decoration: none; letter-spacing: -0.01em;
  border: 1px solid transparent; cursor: pointer;
}
.btn.primary { background: var(--accent); color: var(--bg-1); }
:root[data-theme="dark"] .btn.primary, .btn.primary { color: oklch(0.16 0.005 240); }
.btn.primary:hover { filter: brightness(1.06); }
.btn.ghost { background: var(--bg-1); border-color: var(--hairline-strong); color: var(--text-0); }
.btn.ghost:hover { border-color: var(--accent-line); color: var(--accent-hi); }

/* ── screenshots ───────────────────────────────────────────────────────── */
.shots { display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: 16px; }
figure.shot { margin: 0; border-radius: var(--radius-l); border: 1px solid var(--hairline); background: var(--bg-1); overflow: hidden; box-shadow: var(--shadow); }
figure.shot img { width: 100%; border-bottom: 1px solid var(--hairline); }
figure.shot figcaption { padding: 11px 14px; font-family: var(--mono); font-size: 11px; letter-spacing: 0.08em; text-transform: uppercase; color: var(--text-3); display: flex; align-items: center; gap: 8px; }
figure.shot figcaption .dot { width: 6px; height: 6px; border-radius: 50%; background: var(--accent); flex: none; }
figure.shot.wide { grid-column: 1 / -1; }

/* ── footer ────────────────────────────────────────────────────────────── */
footer.doc-foot { margin-top: 60px; padding-top: 20px; border-top: 1px solid var(--hairline); color: var(--text-3); font-size: 12.5px; font-family: var(--mono); letter-spacing: 0.04em; display: flex; justify-content: space-between; flex-wrap: wrap; gap: 8px; }
footer.doc-foot a { color: var(--text-2); }

/* ── on-page TOC (scroll-spy) ──────────────────────────────────────────── */
.toc { position: sticky; top: calc(var(--signal-h) + 24px); padding: 24px 16px 24px 0; max-height: calc(100vh - var(--signal-h)); overflow-y: auto; }
.toc .t-label { font-family: var(--mono); font-size: 10px; letter-spacing: 0.18em; text-transform: uppercase; color: var(--text-3); padding: 0 10px 10px; }
.toc a { display: block; padding: 5px 10px; border-left: 2px solid var(--hairline); color: var(--text-2); text-decoration: none; font-size: 12.5px; line-height: 1.35; }
.toc a:hover { color: var(--text-0); border-left-color: var(--hairline-strong); }
.toc a.active { color: var(--accent-hi); border-left-color: var(--accent); }

/* ── responsive ────────────────────────────────────────────────────────── */
@media (max-width: 1180px) {
  .shell { grid-template-columns: var(--side-w) minmax(0, 1fr); }
  .toc { display: none; }
}
@media (max-width: 900px) {
  .shell { grid-template-columns: minmax(0, 1fr); }
  .topbar { display: flex; }
  .sidebar {
    position: fixed; top: 0; left: 0; bottom: 0; height: 100dvh;
    width: min(86vw, var(--side-w)); z-index: 60;
    transform: translateX(-100%); transition: transform .22s ease;
    box-shadow: var(--shadow); backdrop-filter: none; background: var(--bg-1);
  }
  body.nav-open .sidebar { transform: none; }
  body.nav-open .scrim { opacity: 1; visibility: visible; }
  .content { padding: 26px 20px 80px; }
  .hero { padding-top: 8px; }
}

/* ── reduced motion ────────────────────────────────────────────────────── */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .signal { animation: none; background-position: 0 0; }
  .sidebar { transition: none; }
  a.card:hover { transform: none; }
}