/*
 * agenticdisco.app — launch site.
 * Design system ported from the app (current/frontend/src/styles/theme.css):
 * "Scandinavian subway map" — near-absolute backgrounds, hairline borders,
 * chroma only on meaningful elements, four type roles.
 */

/* ---- self-hosted variable fonts ---- */
@font-face {
  font-family: "Fraunces Variable";
  src: url("fonts/fraunces-latin-wght-normal.woff2") format("woff2-variations");
  font-weight: 100 900;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: "Schibsted Grotesk Variable";
  src: url("fonts/schibsted-grotesk-latin-wght-normal.woff2") format("woff2-variations");
  font-weight: 400 900;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: "Newsreader Variable";
  src: url("fonts/newsreader-latin-wght-normal.woff2") format("woff2-variations");
  font-weight: 200 800;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: "Newsreader Variable";
  src: url("fonts/newsreader-latin-wght-italic.woff2") format("woff2-variations");
  font-weight: 200 800;
  font-style: italic;
  font-display: swap;
}
@font-face {
  font-family: "JetBrains Mono Variable";
  src: url("fonts/jetbrains-mono-latin-wght-normal.woff2") format("woff2-variations");
  font-weight: 100 800;
  font-style: normal;
  font-display: swap;
}

/* ---- tokens (verbatim from the app) ---- */
:root {
  --font-display: "Fraunces Variable", Georgia, serif;
  --font-ui: "Schibsted Grotesk Variable", system-ui, sans-serif;
  --font-reading: "Newsreader Variable", Georgia, serif;
  --font-mono: "JetBrains Mono Variable", ui-monospace, monospace;

  --radius-card: 0.5rem;
  --radius-control: 0.375rem;
  --width-measure: 46rem;
  --width-doc: 72rem;

  color-scheme: light;
  --bg: oklch(0.99 0.002 95);
  --surface-1: oklch(0.975 0.003 95);
  --surface-2: oklch(0.955 0.004 95);
  --hairline: oklch(0.9 0.004 95);
  --hairline-strong: oklch(0.84 0.005 95);
  --text: oklch(0.21 0.01 90);
  --text-muted: oklch(0.46 0.008 90);
  --text-faint: oklch(0.62 0.006 90);
  --link: oklch(0.5 0.08 245);
  --accent: oklch(0.55 0.09 245);
  --supported: oklch(0.52 0.09 155);
  --weak: oklch(0.62 0.1 80);
  --warn: oklch(0.55 0.13 25);
}
@media (prefers-color-scheme: dark) {
  :root {
    color-scheme: dark;
    --bg: oklch(0.17 0.005 260);
    --surface-1: oklch(0.205 0.006 260);
    --surface-2: oklch(0.245 0.007 260);
    --hairline: oklch(0.32 0.008 260);
    --hairline-strong: oklch(0.42 0.01 260);
    --text: oklch(0.93 0.006 260);
    --text-muted: oklch(0.7 0.008 260);
    --text-faint: oklch(0.56 0.008 260);
    --link: oklch(0.74 0.09 240);
    --accent: oklch(0.78 0.1 240);
    --supported: oklch(0.74 0.1 155);
    --weak: oklch(0.8 0.11 85);
    --warn: oklch(0.72 0.14 25);
  }
}

/* ---- base ---- */
* { box-sizing: border-box; }
html {
  background-color: var(--bg);
  color: var(--text);
  font-family: var(--font-ui);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  scroll-behavior: smooth;
}
body { margin: 0; min-height: 100dvh; font-size: 1rem; line-height: 1.5; }
a { color: var(--link); text-decoration: none; }
a:hover { text-decoration: underline; text-underline-offset: 0.15em; }
::selection { background: color-mix(in oklch, var(--accent) 28%, transparent); }
:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
  border-radius: var(--radius-control);
}
img { max-width: 100%; display: block; }

.wrap { max-width: var(--width-doc); margin: 0 auto; padding: 0 1.5rem; }
.measure { max-width: var(--width-measure); }

/* ---- header ---- */
.site-header {
  position: sticky; top: 0; z-index: 10;
  background: color-mix(in oklch, var(--bg) 88%, transparent);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--hairline);
}
.site-header .wrap {
  display: flex; align-items: center; gap: 1.5rem;
  height: 3.25rem;
}
.header-mark {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1.25rem;
  letter-spacing: -0.014em;
  color: var(--text);
}
.header-mark:hover { text-decoration: none; }
.site-nav { display: flex; gap: 1.1rem; margin-left: auto; flex-wrap: wrap; }
.site-nav a {
  font-size: 0.85rem; font-weight: 500; color: var(--text-muted);
  letter-spacing: 0.01em;
}
.site-nav a:hover { color: var(--text); text-decoration: none; }
.gh-link {
  display: inline-flex; align-items: center; gap: 0.4rem;
  font-size: 0.85rem; font-weight: 600; color: var(--text) !important;
  border: 1px solid var(--hairline-strong);
  border-radius: var(--radius-control);
  padding: 0.3rem 0.7rem;
}
.gh-link:hover { background: var(--surface-1); text-decoration: none; }

/* ---- hero ---- */
.hero { padding: 5.5rem 0 4.5rem; text-align: center; }
.hero .defmark { text-align: left; }
h1, h2, h3 { text-wrap: balance; }
.hero h1 {
  font-family: var(--font-display);
  font-weight: 560;
  font-variation-settings: "opsz" 60, "SOFT" 0, "WONK" 0;
  font-size: clamp(2rem, 5vw, 3.1rem);
  line-height: 1.12;
  letter-spacing: -0.018em;
  margin: 2.6rem auto 1.1rem;
  max-width: 56rem;
}
.hero .sub {
  font-family: var(--font-reading);
  font-size: 1.14rem;
  line-height: 1.55;
  color: var(--text-muted);
  max-width: 44rem;
  margin: 0 auto 2.1rem;
}
.cta-row { display: flex; gap: 0.8rem; justify-content: center; flex-wrap: wrap; }
.btn {
  display: inline-flex; align-items: center; gap: 0.45rem;
  font-family: var(--font-ui); font-weight: 600; font-size: 0.95rem;
  padding: 0.62rem 1.25rem;
  border-radius: var(--radius-control);
  border: 1px solid transparent;
}
.btn:hover { text-decoration: none; }
.btn-primary { background: var(--text); color: var(--bg); }
.btn-primary:hover { opacity: 0.88; }
.btn-quiet {
  border-color: var(--hairline-strong);
  color: var(--text);
  background: transparent;
}
.btn-quiet:hover { background: var(--surface-1); }
.hero-note {
  margin-top: 1.6rem;
  font-size: 0.85rem;
  color: var(--text-faint);
}
.hero-note a { color: var(--text-muted); text-decoration: underline; text-underline-offset: 0.15em; }
.hero-note .tick { color: var(--supported); font-weight: 700; }

/* ---- definition mark (ported from DefinitionMark.tsx) ---- */
.defmark { display: inline-block; }
.defmark .l1 { display: flex; align-items: baseline; gap: 0.42em; flex-wrap: wrap; }
.defmark .hw {
  font-family: var(--font-display);
  font-weight: 600;
  font-variation-settings: "opsz" 40, "SOFT" 0, "WONK" 0;
  font-size: 2em;
  letter-spacing: -0.014em;
  color: var(--text);
  line-height: 0.95;
}
.defmark .pos {
  font-family: var(--font-ui); font-weight: 600; font-size: 0.62em;
  letter-spacing: 0.15em; text-transform: uppercase; color: var(--text-faint);
}
.defmark .pos b { color: var(--accent); font-weight: 700; padding: 0 0.12em; }
.defmark .ipa {
  font-family: var(--font-ui); font-weight: 400; font-size: 0.66em;
  letter-spacing: 0.02em; color: var(--text-faint);
}
.defmark .rule { position: relative; height: 1px; background: var(--hairline); margin: 0.5em 0 0.48em; }
.defmark .rule i {
  position: absolute; left: 0; top: -1px; width: 1.5em; height: 2px;
  background: var(--accent); border-radius: 1px; display: block;
}
.defmark .gloss {
  font-family: var(--font-reading); font-style: italic; font-size: 1.04em;
  line-height: 1.38; color: var(--text-muted);
}
.defmark .root {
  font-family: var(--font-ui); font-weight: 400; font-size: 0.7em;
  letter-spacing: 0.01em; color: var(--text-faint); margin-top: 0.5em;
}
.defmark .root em {
  font-family: var(--font-reading); font-style: italic; font-size: 1.1em;
  color: var(--text-muted);
}
.defmark.s-masthead { font-size: clamp(15pt, 3.4vw, 22pt); }
.defmark.s-colophon { font-size: 10pt; }

/* ---- sections ---- */
section { padding: 4.2rem 0; border-top: 1px solid var(--hairline); }
.kicker {
  font-family: var(--font-ui); font-weight: 600; font-size: 0.72rem;
  letter-spacing: 0.15em; text-transform: uppercase; color: var(--text-faint);
  margin: 0 0 0.7rem;
}
.kicker .tick-accent { color: var(--accent); }
h2 {
  font-family: var(--font-display);
  font-weight: 560;
  font-variation-settings: "opsz" 50;
  font-size: clamp(1.5rem, 3vw, 2.1rem);
  line-height: 1.15;
  letter-spacing: -0.014em;
  margin: 0 0 0.9rem;
}
.section-intro {
  font-family: var(--font-reading);
  font-size: 1.06rem; line-height: 1.55; color: var(--text-muted);
  max-width: var(--width-measure);
  margin: 0 0 2.4rem;
}

/* ---- surfaces (feature rows) ---- */
.surface-row {
  display: grid; grid-template-columns: minmax(16rem, 24rem) 1fr;
  gap: 2.6rem; align-items: center;
  padding: 2.2rem 0;
}
.surface-row + .surface-row { border-top: 1px solid var(--hairline); }
.surface-row.alt { grid-template-columns: 1fr minmax(16rem, 24rem); }
.surface-row.alt .surface-copy { order: 2; }
.surface-row.alt .shot { order: 1; }
.surface-copy h3 {
  font-family: var(--font-display); font-weight: 580;
  font-variation-settings: "opsz" 40;
  font-size: 1.45rem; letter-spacing: -0.01em; margin: 0.4rem 0 0.7rem;
}
.surface-copy p {
  font-size: 0.98rem; line-height: 1.55; color: var(--text-muted); margin: 0 0 0.8rem;
}
.surface-copy .fine { font-size: 0.85rem; color: var(--text-faint); }
.surface-copy .fine code { font-family: var(--font-mono); font-size: 0.8em; }

/* screenshot frames */
.shot {
  border: 1px solid var(--hairline-strong);
  border-radius: var(--radius-card);
  overflow: hidden;
  background: var(--surface-1);
}
.shot .chrome {
  display: flex; align-items: center; gap: 0.3rem;
  padding: 0.45rem 0.7rem;
  border-bottom: 1px solid var(--hairline);
}
.shot .chrome i {
  width: 0.55rem; height: 0.55rem; border-radius: 50%;
  background: var(--hairline-strong); display: block;
}
.shot .chrome span {
  margin-left: 0.5rem;
  font-family: var(--font-mono); font-size: 0.68rem; color: var(--text-faint);
}
.shot img { display: block; width: 100%; height: auto; }
.shot .ph {
  aspect-ratio: 16 / 9;
  display: flex; align-items: center; justify-content: center;
  color: var(--text-faint);
  font-family: var(--font-mono); font-size: 0.75rem;
  letter-spacing: 0.04em;
}

/* ---- research outputs ---- */
.outputs { margin-top: 0.4rem; padding-top: 2.2rem; border-top: 1px solid var(--hairline); }
.outputs .section-intro { margin-bottom: 1.4rem; }
.outputs-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(16rem, 1fr)); gap: 1.2rem; }
.output-card {
  display: flex; flex-direction: column; color: inherit;
  border: 1px solid var(--hairline-strong); border-radius: var(--radius-card);
  background: var(--surface-1); overflow: hidden;
}
.output-card:hover { border-color: var(--accent); }
.output-card a.art:hover { text-decoration: none; }
.output-card .art {
  position: relative; display: grid; grid-template-rows: minmax(0, 1fr); place-items: center;
  aspect-ratio: 3 / 2; overflow: hidden; background: var(--surface-2);
  padding: 1rem; border-bottom: 1px solid var(--hairline);
}
.output-card .art > img { max-width: 100%; max-height: 100%; width: auto; height: auto; object-fit: contain; box-shadow: 0 6px 24px rgba(0,0,0,0.12); border-radius: 3px; }
.output-card .art .art-b { position: absolute; width: 58%; right: 6%; bottom: 8%; }
.output-card .art img:first-child:not(:only-child) { width: 70%; position: absolute; left: 6%; top: 10%; }
.output-card .art-audio { display: flex; flex-direction: column; justify-content: center; gap: 0.9rem; padding: 1.2rem 1.4rem; }
.output-card .art-audio audio { width: 100%; }
.output-card .art-audio .quote { font-family: var(--font-reading); font-style: italic; font-size: 0.92rem; line-height: 1.45; color: var(--text-muted); margin: 0; }
.output-card .cap { padding: 0.9rem 1rem 1rem; }
.output-card h4 { font-family: var(--font-display); font-weight: 600; font-size: 1.05rem; margin: 0 0 0.35rem; }
.output-card .cap p { font-size: 0.9rem; line-height: 1.5; color: var(--text-muted); margin: 0; }
.output-card .cap .mono { margin-top: 0.5rem; }
.output-card .mono { font-family: var(--font-mono); font-size: 0.7rem; color: var(--text-faint); }

/* ---- showcase gallery ---- */
.gallery {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(min(100%, 28rem), 1fr));
  gap: 1.2rem;
}
.gallery-card {
  border: 1px solid var(--hairline-strong);
  border-radius: var(--radius-card);
  overflow: hidden;
  background: var(--surface-1);
  display: flex; flex-direction: column;
  color: inherit;
}
.gallery-card:hover { text-decoration: none; border-color: var(--accent); }
.gallery-card .ph {
  aspect-ratio: 4 / 3;
  display: flex; align-items: center; justify-content: center;
  color: var(--text-faint); font-family: var(--font-mono); font-size: 0.72rem;
  border-bottom: 1px solid var(--hairline);
}
.gallery-card .thumb {
  display: block; width: 100%; aspect-ratio: 4 / 3; object-fit: cover; object-position: top;
  border-bottom: 1px solid var(--hairline);
}
.gallery-card .cap { padding: 0.8rem 0.9rem; }
.gallery-card .prompt {
  font-family: var(--font-reading); font-style: italic;
  font-size: 0.92rem; line-height: 1.4; color: var(--text);
  margin: 0 0 0.4rem;
}
.gallery-card .meta {
  font-family: var(--font-mono); font-size: 0.68rem; color: var(--text-faint);
}

/* ---- models section ---- */
.card-grid {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(15rem, 1fr));
  gap: 1.2rem;
}
.card {
  border: 1px solid var(--hairline);
  border-radius: var(--radius-card);
  background: var(--surface-1);
  padding: 1.2rem 1.3rem;
}
.card h4 {
  font-family: var(--font-ui); font-weight: 650; font-size: 0.98rem;
  margin: 0 0 0.45rem;
}
.card p { font-size: 0.9rem; line-height: 1.5; color: var(--text-muted); margin: 0; }
.keyless-note {
  margin-top: 1.6rem; font-size: 0.9rem; color: var(--text-muted);
  max-width: var(--width-measure);
}
.keyless-note strong { color: var(--text); }

/* ---- tested (stat tiles) ---- */
.stat-grid {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(13rem, 1fr));
  gap: 1.2rem; margin: 2.4rem 0 2rem;
}
.stat {
  border: 1px solid var(--hairline);
  border-radius: var(--radius-card);
  background: var(--surface-1);
  padding: 1.4rem 1.5rem 1.3rem;
}
.stat .n {
  font-family: var(--font-display);
  font-weight: 560;
  font-variation-settings: "opsz" 50;
  font-size: 2.3rem;
  letter-spacing: -0.02em;
  line-height: 1.05;
}
.stat .tick {
  width: 1.5rem; height: 2px; background: var(--accent);
  border-radius: 1px; margin: 0.55rem 0 0.5rem;
}
.stat .l {
  font-size: 0.86rem; line-height: 1.45; color: var(--text-muted);
}
.tested-fine {
  font-size: 0.9rem; line-height: 1.55; color: var(--text-muted);
  max-width: var(--width-measure);
}
.tested-fine strong { color: var(--text); }

/* ---- benchmark ---- */
.bench-status {
  display: inline-flex; align-items: center; gap: 0.5rem;
  font-family: var(--font-mono); font-size: 0.75rem;
  color: var(--weak);
  border: 1px solid color-mix(in oklch, var(--weak) 45%, transparent);
  border-radius: 999px;
  padding: 0.25rem 0.8rem;
  margin-bottom: 1.4rem;
}
.bench-table-wrap { overflow-x: auto; border: 1px solid var(--hairline-strong); border-radius: var(--radius-card); }
table.bench {
  width: 100%; border-collapse: collapse;
  font-size: 0.88rem;
}
table.bench th, table.bench td {
  text-align: left; padding: 0.65rem 0.9rem;
  border-bottom: 1px solid var(--hairline);
  white-space: nowrap;
}
table.bench thead th {
  font-family: var(--font-ui); font-weight: 650; font-size: 0.78rem;
  letter-spacing: 0.06em; text-transform: uppercase; color: var(--text-faint);
  background: var(--surface-1);
}
table.bench tbody tr:last-child td { border-bottom: none; }
table.bench td.sys { font-weight: 600; }
table.bench td.sys .self {
  font-family: var(--font-mono); font-size: 0.7rem; color: var(--supported);
  margin-left: 0.45rem;
}
table.bench td.pend { color: var(--text-faint); font-family: var(--font-mono); font-size: 0.8rem; }
.bench-duo {
  display: grid; grid-template-columns: 1fr 1fr;
  gap: 1.6rem; align-items: start; margin-bottom: 1.6rem;
}
@media (max-width: 52rem) { .bench-duo { grid-template-columns: 1fr; } }
.bench-caption {
  font-family: var(--font-display); font-weight: 600;
  font-size: 0.98rem; margin: 0 0 0.6rem;
}
.bench-caption span {
  display: block; font-family: var(--font-mono); font-weight: 400;
  font-size: 0.68rem; color: var(--text-faint);
  letter-spacing: 0.02em; margin-top: 0.2rem;
}
table.bench th.num { text-align: right; }
table.bench td.num {
  font-family: var(--font-mono); font-size: 0.84rem;
  text-align: right; white-space: nowrap;
}
table.bench tr.hl td {
  background: color-mix(in oklch, var(--accent) 9%, transparent);
}
table.bench tr.hl td.num { font-weight: 700; }
table.bench tr.ref td {
  color: var(--text-faint); font-size: 0.78rem; font-style: italic;
}
table.bench tr.ref td.num { font-weight: 400; font-style: normal; }
.bench-note {
  margin: 0 0 1.1rem; font-size: 0.95rem; line-height: 1.6;
  color: var(--text-muted); max-width: var(--width-measure);
}
.bench-note strong { color: var(--text); }
.bench-fine {
  margin-top: 1rem; font-size: 0.83rem; color: var(--text-faint);
  max-width: var(--width-measure);
}
.bench-fine a { color: var(--text-muted); }

/* ---- benchmark bar charts ---- */
.bars {
  list-style: none; margin: 0; padding: 0.85rem 1rem;
  border: 1px solid var(--hairline-strong); border-radius: var(--radius-card);
  display: grid; gap: 0.6rem; background: var(--surface-1);
}
.bars li {
  display: grid; grid-template-columns: minmax(8rem, 12rem) 1fr auto;
  align-items: center; gap: 0.75rem; font-size: 0.86rem;
}
.bars .sys { font-weight: 600; line-height: 1.25; }
.bars .sys .self {
  display: block; font-family: var(--font-mono); font-weight: 400;
  font-size: 0.66rem; color: var(--supported); letter-spacing: 0.01em;
}
.bars .track {
  position: relative; display: block; height: 0.8rem;
  background: var(--surface-2); border-radius: 3px;
}
.bars .fill {
  position: absolute; top: 0; bottom: 0; left: 0;
  width: calc(var(--v) / var(--max) * 100%);
  background: var(--text-faint); border-radius: 3px;
}
.bars li.hl .fill { background: var(--accent); }
.bars .mark {
  position: absolute; top: -0.3rem; bottom: -0.3rem;
  left: calc(var(--v) / var(--max) * 100%); width: 2px;
  background: var(--text); opacity: 0.55;
}
.bars .val {
  font-family: var(--font-mono); font-size: 0.8rem; text-align: right;
  white-space: nowrap; min-width: 3rem;
}
.bars li.hl .val { font-weight: 700; }
.bars-title {
  font-family: var(--font-mono); font-size: 0.68rem; color: var(--text-faint);
  letter-spacing: 0.02em; margin: 0.9rem 0 0.4rem;
}
.bars-legend {
  display: flex; align-items: center; gap: 0.5rem;
  font-family: var(--font-mono); font-size: 0.68rem; color: var(--text-faint); margin: 0.5rem 0 0;
}
.bars-legend .mark-key { width: 2px; height: 0.9rem; background: var(--text); opacity: 0.55; display: inline-block; }
.bars-wide { margin-bottom: 1.6rem; }
.bars-wide li { grid-template-columns: minmax(8rem, 14rem) 1fr auto; }
.bars-grid {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 1rem; margin-bottom: 1.6rem;
}
@media (max-width: 60rem) { .bars-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 40rem) { .bars-grid { grid-template-columns: 1fr; } }
.bars-task > p {
  font-family: var(--font-display); font-weight: 600; font-size: 0.92rem; margin: 0 0 0.4rem;
}
.bars-task > p span {
  font-family: var(--font-mono); font-weight: 400; font-size: 0.66rem; color: var(--text-faint); margin-left: 0.4rem;
}
.bars-mini { padding: 0.6rem 0.75rem; gap: 0.4rem; }
.bars-mini li { grid-template-columns: 5.2rem 1fr auto; font-size: 0.78rem; }
.bars-mini .track { height: 0.6rem; }
.bars-mini .val { font-size: 0.74rem; min-width: 2.2rem; }
.bench-sub { margin-top: 3.2rem; padding-top: 2.4rem; border-top: 1px solid var(--hairline); }
.bench-sub h3 {
  font-family: var(--font-display); font-weight: 600; font-size: 1.6rem;
  letter-spacing: -0.01em; margin: 0 0 0.9rem; line-height: 1.15;
}

/* ---- architecture ---- */
.arch-grid {
  display: grid; grid-template-columns: minmax(20rem, 1fr) minmax(18rem, 26rem);
  gap: 2.6rem; align-items: center;
}
.arch-diagram svg { width: 100%; height: auto; display: block; }
.arch-points { list-style: none; margin: 1.4rem 0 0; padding: 0; }
.arch-points li {
  position: relative; padding-left: 1.3rem;
  font-size: 0.95rem; line-height: 1.5; color: var(--text-muted);
  margin-bottom: 0.7rem;
}
.arch-points li::before {
  content: ""; position: absolute; left: 0; top: 0.6em;
  width: 0.6rem; height: 2px; background: var(--accent); border-radius: 1px;
}
.arch-points strong { color: var(--text); font-weight: 600; }

/* ---- license promise ---- */
.promise {
  border: 1px solid var(--hairline-strong);
  border-radius: var(--radius-card);
  background: var(--surface-1);
  padding: 2.4rem 2.6rem;
  max-width: 56rem;
}
.promise blockquote {
  font-family: var(--font-reading);
  font-size: 1.22rem; line-height: 1.5; font-style: italic;
  color: var(--text);
  margin: 0 0 1rem;
}
.promise .who {
  font-family: var(--font-ui); font-size: 0.85rem; color: var(--text-faint);
}

/* ---- about ---- */
.about-grid {
  display: grid; grid-template-columns: minmax(11rem, 14rem) 1fr;
  gap: 2.6rem; align-items: start;
  max-width: 56rem;
}
.about-portrait {
  aspect-ratio: 1 / 1;
  border: 1px solid var(--hairline-strong);
  border-radius: var(--radius-card);
  background: var(--surface-1);
  display: flex; align-items: center; justify-content: center;
  color: var(--text-faint);
  font-family: var(--font-mono); font-size: 0.72rem;
  overflow: hidden;
}
.about-portrait img { width: 100%; height: 100%; object-fit: cover; }
.about-prose {
  font-family: var(--font-reading);
  font-size: 1.06rem; line-height: 1.55; color: var(--text);
}
.about-prose p { margin: 0 0 1rem; }
.about-prose .fill {
  color: var(--text-faint); font-style: italic;
  border-bottom: 1px dashed var(--hairline-strong);
}
.about-links {
  display: flex; gap: 1.4rem; flex-wrap: wrap;
  margin-top: 1.3rem;
  font-family: var(--font-ui); font-size: 0.88rem;
}
@media (max-width: 800px) {
  .about-grid { grid-template-columns: 1fr; gap: 1.4rem; }
  .about-portrait { max-width: 11rem; }
}

/* ---- quickstart ---- */
.steps { counter-reset: step; list-style: none; margin: 0 0 2rem; padding: 0; display: grid; gap: 1rem; grid-template-columns: repeat(auto-fit, minmax(15rem, 1fr)); }
.steps li {
  border: 1px solid var(--hairline); border-radius: var(--radius-card);
  background: var(--surface-1); padding: 1.1rem 1.2rem;
}
.steps li::before {
  counter-increment: step;
  content: "0" counter(step);
  display: block;
  font-family: var(--font-mono); font-size: 0.8rem; color: var(--accent);
  margin-bottom: 0.5rem;
}
.steps li p { margin: 0; font-size: 0.92rem; color: var(--text-muted); line-height: 1.5; }
.steps li p strong { color: var(--text); }
pre.code {
  background: var(--surface-2);
  border: 1px solid var(--hairline-strong);
  border-radius: var(--radius-card);
  padding: 1.1rem 1.3rem;
  overflow-x: auto;
  font-family: var(--font-mono);
  font-size: 0.84rem; line-height: 1.6;
  color: var(--text);
  margin: 0;
}
pre.code .c { color: var(--text-faint); }
.quickstart-fine { margin-top: 1rem; font-size: 0.85rem; color: var(--text-faint); }

/* ---- essay ---- */
.essay { padding: 4.5rem 0 5rem; }
.essay .wrap { max-width: 50rem; }
.essay h1 {
  font-family: var(--font-display);
  font-weight: 560;
  font-variation-settings: "opsz" 60, "SOFT" 0, "WONK" 0;
  font-size: clamp(2.1rem, 5vw, 3rem);
  line-height: 1.1;
  letter-spacing: -0.018em;
  margin: 0.4rem 0 0.9rem;
}
.essay-sub {
  font-family: var(--font-reading);
  font-style: italic;
  font-size: 1.18rem; line-height: 1.5;
  color: var(--text-muted);
  margin: 0 0 1rem;
}
.essay-meta {
  font-size: 0.85rem; color: var(--text-faint);
  margin: 0 0 2.8rem;
  padding-bottom: 1.6rem;
  border-bottom: 1px solid var(--hairline);
}
.essay-body {
  font-family: var(--font-reading);
  font-size: 1.09rem; line-height: 1.6;
}
.essay-body p { margin: 0 0 1.15rem; }
.essay-body h2 {
  font-family: var(--font-display);
  font-size: 1.45rem;
  margin: 2.4rem 0 0.9rem;
}
.essay-body em { font-style: italic; }
.essay-body code {
  font-family: var(--font-mono); font-size: 0.82em;
  background: var(--surface-2);
  border: 1px solid var(--hairline);
  border-radius: 4px;
  padding: 0.08em 0.35em;
}
.essay-body pre.code {
  font-size: 0.8rem;
  margin: 1.3rem 0 1.4rem;
}
.essay-back { margin-top: 3rem; font-family: var(--font-ui); font-size: 0.9rem; }

/* ---- footer ---- */
.site-footer { border-top: 1px solid var(--hairline); padding: 3rem 0 3.5rem; }
.site-footer .wrap {
  display: flex; flex-wrap: wrap; gap: 2.5rem;
  align-items: flex-start; justify-content: space-between;
}
.footer-links { display: flex; gap: 2.5rem; flex-wrap: wrap; }
.footer-links div { display: flex; flex-direction: column; gap: 0.45rem; }
.footer-links h5 {
  font-family: var(--font-ui); font-weight: 650; font-size: 0.72rem;
  letter-spacing: 0.12em; text-transform: uppercase; color: var(--text-faint);
  margin: 0 0 0.3rem;
}
.footer-links a { font-size: 0.88rem; color: var(--text-muted); }
.footer-links a:hover { color: var(--text); }

/* ---- responsive ---- */
@media (max-width: 800px) {
  .surface-row, .surface-row.alt { grid-template-columns: 1fr; gap: 1.4rem; }
  .surface-row.alt .surface-copy { order: 1; }
  .surface-row.alt .shot { order: 2; }
  .arch-grid { grid-template-columns: 1fr; }
  .hero { padding: 3.5rem 0 3rem; }
  .site-nav { display: none; }
  .promise { padding: 1.6rem 1.4rem; }
}


/* ---- docs pages (site/docs/*) ---------------------------------------- */
.docs .essay-body h3 { font-family: var(--font-display); font-size: 1.15rem; margin: 1.6rem 0 0.5rem; }
.docs .essay-body ul, .docs .essay-body ol { margin: 0 0 1.15rem; padding-left: 1.4rem; }
.docs .essay-body li { margin: 0.3rem 0; }
.docs .essay-body pre.code { white-space: pre-wrap; word-break: break-word; }
table.doc { width: 100%; border-collapse: collapse; margin: 0.6rem 0 1.4rem; font-size: 0.92rem; }
table.doc th, table.doc td { text-align: left; vertical-align: top; padding: 0.55rem 0.7rem; border-bottom: 1px solid var(--hairline); }
table.doc thead th { font-family: var(--font-display); font-weight: 600; color: var(--text-muted); font-size: 0.8rem; letter-spacing: 0.02em; text-transform: uppercase; }
table.doc tbody tr:last-child td { border-bottom: none; }
.doc-note { border-left: 3px solid var(--accent); background: var(--surface-2); padding: 0.8rem 1rem; margin: 1.2rem 0 1.4rem; border-radius: 0 6px 6px 0; }
.doc-ref { margin-top: 2.4rem; padding-top: 1rem; border-top: 1px solid var(--hairline); color: var(--text-muted); font-size: 0.92rem; }
.doc-cards { display: grid; gap: 1rem; grid-template-columns: repeat(auto-fit, minmax(15rem, 1fr)); margin: 0.5rem 0 2rem; }
.doc-card { display: block; padding: 1.1rem 1.2rem; border: 1px solid var(--hairline); border-radius: 8px; background: var(--surface-2); color: inherit; text-decoration: none; }
.doc-card:hover { border-color: var(--accent); text-decoration: none; }
.doc-card h3 { margin: 0 0 0.4rem; font-family: var(--font-display); font-size: 1.05rem; }
.doc-card p { margin: 0; font-size: 0.9rem; color: var(--text-muted); line-height: 1.5; }

/* Build components and portable deployment. */
.build-capabilities { margin: 4rem 0; padding: 2.5rem 0; border-top: 1px solid var(--hairline, #8885); border-bottom: 1px solid var(--hairline, #8885); }
.capability-list { margin: 2rem 0; }
.capability-list > div { display: grid; grid-template-columns: minmax(160px, 1fr) 2fr; gap: 2rem; padding: 1rem 0; border-bottom: 1px solid var(--hairline, #8883); }
.capability-list dt { font-weight: 600; }
.capability-list dd { margin: 0; line-height: 1.65; }
.export-example { min-width: 0; padding: clamp(1rem, 3vw, 2rem); border: 1px solid var(--hairline, #8885); }
.export-example pre { overflow-x: auto; font-size: .85rem; line-height: 1.7; }
.build-export { margin-bottom: 4rem; }
@media (max-width: 600px) { .capability-list > div { grid-template-columns: 1fr; gap: .5rem; } }

/* Launch film: explicit playback with captions and a text alternative. */
.launch-film { display: block; width: 100%; aspect-ratio: 16 / 9; background: #17191d; border: 1px solid var(--hairline); border-radius: 8px; margin: 1.5rem 0 1rem; }