/* etalon landing page. Layout and visual language follow docs/design/studio-reference.html:
   one fixed full-height frame, four ticker bands in the outer grid tracks, and
   archive (left) / stage (centre) / inspector (right) inside. Paper, ink, one
   spectrum stripe. No dark surfaces: fields sit on white. Fonts are bundled (no runtime fetch). */
@font-face {
  font-family: "Inter";
  src: url("fonts/inter.woff2") format("woff2");
  font-weight: 100 900;
  font-display: swap;
}
@font-face {
  font-family: "JetBrains Mono";
  src: url("fonts/jetbrains-mono.woff2") format("woff2");
  font-weight: 100 800;
  font-display: swap;
}

:root {
  --bg: #F2F0E4;
  --fg: #000000;
  --ink-2: #444444;
  --ink-3: #666666;
  --panel: #ffffff;
  --well: #e8e6d9;
  --hover: #e4e2d6;
  --void: #ffffff;
  --void-fg: #000000;
  --void-mute: #666666;
  --spectrum: linear-gradient(to right, #ff0000, #ff7f00, #ffff00, #00ff00, #0000ff, #4b0082, #8f00ff);
  --border: 1px solid var(--fg);
  --sans: "Inter", system-ui, -apple-system, "Helvetica Neue", Arial, "PingFang SC", "Microsoft YaHei", "Noto Sans CJK SC", sans-serif;
  --mono: "JetBrains Mono", ui-monospace, "SF Mono", Menlo, Consolas, monospace;
  color-scheme: light;
}

* { box-sizing: border-box; margin: 0; padding: 0; cursor: crosshair; }
html, body { height: 100%; }
body {
  background: var(--bg);
  color: var(--fg);
  font-family: var(--sans);
  font-size: 14px;
  line-height: 1.4;
  overflow: hidden;
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; }
button { font: inherit; color: inherit; background: none; border: 0; text-align: left; }
button:focus-visible, a:focus-visible { outline: 2px solid var(--fg); outline-offset: -2px; }

/* ---------- Frame + tickers ---------- */
.frame {
  height: 100%;
  display: grid;
  grid-template-columns: 30px minmax(0, 1fr) 30px;
  grid-template-rows: 30px minmax(0, 1fr) 30px;
  grid-template-areas:
    "top  top  top"
    "left main right"
    "bot  bot  bot";
}
.ticker { display: flex; align-items: center; overflow: hidden; white-space: nowrap; background: var(--bg); }
.ticker-top    { grid-area: top;   border-bottom: var(--border); }
.ticker-bottom { grid-area: bot;   border-top: var(--border); }
.ticker-left   { grid-area: left;  border-right: var(--border); writing-mode: vertical-rl; }
.ticker-right  { grid-area: right; border-left: var(--border);  writing-mode: vertical-rl; }
.marquee {
  display: flex;
  flex: none;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  font-variant-numeric: tabular-nums;
  animation: marquee-x 32s linear infinite;
}
.marquee > span { flex: none; padding-inline-end: 2.5em; }
.ticker-left .marquee, .ticker-right .marquee { animation-name: marquee-y; animation-duration: 40s; }
@keyframes marquee-x { to { transform: translateX(-50%); } }
@keyframes marquee-y { to { transform: translateY(-50%); } }

/* ---------- Main grid ---------- */
main {
  grid-area: main;
  display: grid;
  grid-template-columns: 340px minmax(0, 1fr) 300px;
  grid-template-rows: minmax(0, 1fr);
  min-height: 0;
  background: var(--bg);
}
main > * { min-height: 0; min-width: 0; }

/* ---------- Archive (left) ---------- */
.archive { display: flex; flex-direction: column; border-right: var(--border); }
.archive-header { padding: 15px; border-bottom: var(--border); }
.archive-header h1 { font-size: 42px; font-weight: 900; letter-spacing: -0.04em; line-height: 0.9; }
.archive-header h1 { display: flex; align-items: center; gap: 0.22em; }
.logo-mark { width: 1.05em; height: 1.05em; flex: none; }
.tagline { margin-top: 8px; font-family: var(--mono); font-size: 11px; color: var(--ink-2); }
.actions { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 12px; }
.action {
  display: inline-flex; align-items: center;
  min-height: 30px; padding: 4px 10px;
  border: var(--border);
  background: var(--panel);
  font-family: var(--mono); font-size: 11px; font-weight: 700;
  text-decoration: none;
  cursor: pointer;
}
.action.primary { background: var(--fg); color: var(--panel); }
.action:hover { background: var(--hover); color: var(--fg); }
.action.primary:hover { background: var(--ink-2); color: var(--panel); }
.lang { margin-left: auto; }
.archive-description { padding: 15px; font-size: 13px; border-bottom: var(--border); max-width: 44ch; }
.archive-list { list-style: none; flex: 1 1 auto; min-height: 0; overflow-y: auto; }
.row {
  display: grid;
  grid-template-columns: 8ch minmax(0, 1fr);
  gap: 12px;
  width: 100%;
  padding: 8px 12px;
  border-bottom: var(--border);
  font-family: var(--mono);
  font-size: 12px;
  font-variant-numeric: tabular-nums;
  cursor: pointer;
  transition: background .15s;
}
.row span { cursor: pointer; }
.row:hover { background: var(--hover); }
.row[aria-current="true"] { background: var(--spectrum); font-weight: 700; }

/* ---------- Stage (centre) ---------- */
.stage { display: flex; flex-direction: column; background: var(--panel); }
.stage-header {
  display: flex; justify-content: space-between; align-items: center; gap: 12px;
  padding: 10px 15px;
  border-bottom: var(--border);
  font-family: var(--mono); font-size: 11px; font-variant-numeric: tabular-nums;
}
.close-btn {
  flex: none; width: 24px; height: 24px;
  display: grid; place-items: center;
  border: var(--border);
  cursor: pointer;
}
.close-btn:hover { background: var(--fg); color: var(--panel); }
.visual-frame {
  flex: 1 1 auto; min-height: 0;
  display: grid; place-items: center;
  padding: clamp(16px, 4vw, 40px);
  background: var(--well);
  container-type: size;
}
.main-canvas {
  position: relative;
  overflow: hidden;
  width: min(100%, 600px);
  max-height: 100%;
  aspect-ratio: 1;
  background: var(--void);
  border: 10px solid var(--panel);
  box-shadow: 0 0 0 1px var(--fg);
}
@supports (width: 1cqw) {
  .main-canvas { width: min(100cqw, 100cqh, 600px); max-height: none; }
}
#field { display: block; width: 100%; height: 100%; }
.experiment-overlay {
  position: absolute; left: 16px; bottom: 16px;
  max-width: min(280px, calc(100% - 32px));
  padding: 10px;
  background: var(--bg);
  border: var(--border);
  font-size: 11px;
  pointer-events: none;
}
.experiment-overlay b { display: block; margin-bottom: 4px; font-weight: 700; }
.scale-note {
  position: absolute; right: 12px; top: 10px;
  font-family: var(--mono); font-size: 10px; color: var(--void-mute);
  pointer-events: none;
}
.stage-footer {
  display: grid;
  grid-template-columns: minmax(170px, 220px) minmax(0, 1fr);
  gap: 12px 20px;
  padding: 15px;
  border-top: var(--border);
}
.stage-title { font-size: 24px; font-weight: 900; letter-spacing: -0.04em; line-height: 1; text-wrap: balance; }
.stage-abstract { font-size: 11px; line-height: 1.5; color: var(--ink-2); max-width: 70ch; }
.stage-abstract b { font-weight: 700; color: var(--fg); }

[hidden] { display: none !important; }

/* ---------- About (the first archive entry) ---------- */
.about {
  width: min(100%, 780px);
  max-height: 100%;
  overflow-y: auto;
  padding: 20px;
  background: var(--panel);
  border: var(--border);
}
.about-title { font-size: 28px; font-weight: 900; letter-spacing: -0.04em; line-height: 1; text-wrap: balance; margin-bottom: 16px; }
.about-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 14px 20px; }
.about-grid p { font-size: 12.5px; line-height: 1.55; color: var(--ink-2); }
.about-video { margin-top: 18px; }
.about-video video { display: block; width: 100%; aspect-ratio: 16 / 9; border: var(--border); background: var(--well); }
.about-video figcaption { margin-top: 5px; font-family: var(--mono); font-size: 9px; }
@media (max-width: 900px) {
  .about-grid { grid-template-columns: minmax(0, 1fr); }
  .visual-frame:has(.about:not([hidden])) { height: auto; container-type: normal; }
  .about { max-height: none; }
}

/* ---------- Inspector (right) ---------- */
.inspector { display: flex; flex-direction: column; border-left: var(--border); overflow-y: auto; font-size: 12px; }
.panel { padding: 15px; border-bottom: var(--border); }
.panel-label {
  display: block; margin-bottom: 6px;
  font-family: var(--mono); font-size: 10px; letter-spacing: 0.08em; text-transform: uppercase;
  color: var(--ink-3);
}
.subject-name { font-size: 18px; font-weight: 800; line-height: 1.1; text-wrap: balance; }
.subject-role { margin-top: 5px; font-family: var(--mono); font-size: 10px; }
.tag-cloud { display: flex; flex-wrap: wrap; gap: 5px; }
.tag { padding: 2px 6px; font-size: 10px; font-weight: 700; letter-spacing: 0.04em; border: var(--border); background: var(--panel); }
.spectrum-bar { height: 4px; margin: 10px 0; background: var(--spectrum); }
.knobs { display: grid; gap: 5px; }
.knob {
  display: grid; place-items: center;
  min-height: 30px; padding: 4px 8px;
  border: var(--border);
  background: var(--panel);
  font-family: var(--mono); font-size: 11px; font-weight: 700; font-variant-numeric: tabular-nums;
  text-align: center;
}
.figure { margin-top: 20px; }
.figure canvas { display: block; width: 100%; max-width: 100%; aspect-ratio: 20 / 13; border: var(--border); background: var(--void); }
.figure-caption { margin-top: 5px; font-family: var(--mono); font-size: 9px; }
.panel-live { margin-top: auto; border-bottom: 0; background: var(--panel); color: var(--fg); }
.panel-live .panel-label { color: var(--void-mute); }
#live-data {
  height: 100px; overflow: hidden;
  font-family: var(--mono); font-size: 9px; line-height: 1.5;
  white-space: pre; font-variant-numeric: tabular-nums;
}

/* ---------- Responsive ---------- */
@media (max-width: 1180px) {
  main { grid-template-columns: 290px minmax(0, 1fr) 260px; }
  .archive-header h1 { font-size: 36px; }
}
@media (max-width: 900px) {
  body { overflow: auto; }
  .ticker-left, .ticker-right { display: none; }
  .frame { grid-template-columns: 0 minmax(0, 1fr) 0; height: auto; min-height: 100%; }
  main {
    grid-template-columns: minmax(0, 1fr);
    grid-template-rows: auto;
    grid-auto-rows: auto;
    padding-left: max(16px, env(safe-area-inset-left, 0px));
    padding-right: max(16px, env(safe-area-inset-right, 0px));
  }
  .archive { border-right: 0; border-bottom: var(--border); }
  .archive-list { max-height: 240px; }
  .visual-frame { flex: none; height: min(100vw, 520px); }
  .stage-footer { grid-template-columns: minmax(0, 1fr); }
  .inspector { border-left: 0; border-top: var(--border); overflow: visible; }
}
@media (prefers-reduced-motion: reduce) {
  .marquee { animation: none; }
  .row { transition: none; }
}