/* Shared look for the menu and the chemistry lab: same tokens as the rover builder. */
:root {
  --bg: #e9eeeb;
  --panel: #f8faf9;
  --ink: #14201b;
  --muted: #56675e;
  --line: #d2dbd6;
  --chip: #e2e9e5;
  --accent: #b9530f;
  --accent-ink: #ffffff;
  --ok: #1d7a4c;
  --bad: #b8352b;
  --scene: #d9e1dc;
  --chem: #1f6fa8;
  --font-display: "Chakra Petch", "Bahnschrift", "Arial Narrow", sans-serif;
  --font-body: "IBM Plex Sans", system-ui, -apple-system, "Segoe UI", sans-serif;
  --font-mono: "IBM Plex Mono", ui-monospace, "SFMono-Regular", Menlo, monospace;
  --radius: 8px;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #0e1412; --panel: #141c19; --ink: #e2eae6; --muted: #92a39a; --line: #26332d; --chip: #1c2622;
    --accent: #f08c3e; --accent-ink: #1c0e03; --ok: #4cc48a; --bad: #f06b5f; --scene: #101815; --chem: #5aa9e0;
    color-scheme: dark;
  }
}
:root[data-theme="dark"] {
  --bg: #0e1412; --panel: #141c19; --ink: #e2eae6; --muted: #92a39a; --line: #26332d; --chip: #1c2622;
  --accent: #f08c3e; --accent-ink: #1c0e03; --ok: #4cc48a; --bad: #f06b5f; --scene: #101815; --chem: #5aa9e0;
  color-scheme: dark;
}

* { box-sizing: border-box; }
[hidden] { display: none !important; }
html, body { height: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font: 400 15px/1.55 var(--font-body);
}
a { color: inherit; }
button, input { font: inherit; color: inherit; }
button, .btn {
  cursor: pointer;
  border: 1px solid var(--line);
  background: var(--chip);
  border-radius: 6px;
  padding: 8px 14px;
  font-weight: 600;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 8px;
}
button:hover:not(:disabled), .btn:hover { border-color: var(--muted); }
button:focus-visible, .btn:focus-visible, a:focus-visible, [tabindex]:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
button:disabled { opacity: 0.45; cursor: default; }
.primary { background: var(--accent); color: var(--accent-ink); border-color: transparent; }
sub { font-size: 0.72em; line-height: 0; }
.eyebrow {
  margin: 0;
  font: 600 11px/1.2 var(--font-mono);
  text-transform: uppercase;
  letter-spacing: 0.09em;
  color: var(--muted);
}

/* ================================================================ menu */
.menu {
  min-height: 100%;
  display: flex;
  flex-direction: column;
  padding-block: 28px 40px;
  padding-left: max(16px, env(safe-area-inset-left, 0px));
  padding-right: max(16px, env(safe-area-inset-right, 0px));
}
.menu-inner { width: 100%; max-width: 1040px; margin: 0 auto; display: grid; gap: 28px; }
.topbar { display: flex; align-items: center; justify-content: space-between; gap: 12px; flex-wrap: wrap; }
.wordmark { font: 700 20px/1 var(--font-display); letter-spacing: 0.01em; text-decoration: none; }
.wordmark b { color: var(--accent); }
.crumbs { display: flex; flex-wrap: wrap; gap: 6px; align-items: center; font: 500 12px var(--font-mono); color: var(--muted); }
.crumbs a { text-decoration: none; }
.crumbs a:hover { color: var(--ink); text-decoration: underline; }

.hero { display: grid; grid-template-columns: minmax(0, 1.1fr) minmax(0, 1fr); gap: 32px; align-items: center; padding-block: 24px; }
.hero h1 { margin: 0; font: 700 clamp(40px, 7vw, 76px)/0.95 var(--font-display); letter-spacing: -0.01em; text-wrap: balance; }
.hero h1 span { color: var(--accent); }
.hero p { margin: 16px 0 0; max-width: 46ch; font-size: 17px; color: var(--muted); }
.hero .actions { margin-top: 26px; display: flex; gap: 10px; flex-wrap: wrap; }
.hero .actions .primary { font-size: 17px; padding: 12px 26px; }
.bench {
  position: relative;
  aspect-ratio: 4 / 3;
  max-width: 100%;
  border-radius: 14px;
  background: var(--scene);
  border: 1px solid var(--line);
  overflow: hidden;
}
.bench svg { width: 100%; height: 100%; display: block; }

.view { display: grid; gap: 18px; }
.view-head { display: grid; gap: 6px; }
.view-head h2 { margin: 0; font: 600 clamp(26px, 4vw, 36px)/1.1 var(--font-display); text-wrap: balance; }
.view-head p { margin: 0; color: var(--muted); max-width: 62ch; }

.cards { display: grid; grid-template-columns: repeat(auto-fill, minmax(250px, 1fr)); gap: 14px; }
.card {
  display: grid;
  gap: 10px;
  align-content: start;
  padding: 18px;
  border-radius: 12px;
  border: 1px solid var(--line);
  background: var(--panel);
  text-decoration: none;
  color: inherit;
  text-align: left;
  font-weight: 400;
  min-width: 0;
}
a.card:hover, button.card:hover:not(:disabled) { border-color: var(--accent); }
.card .icon { width: 56px; height: 56px; }
.card h3 { margin: 0; font: 600 21px/1.15 var(--font-display); }
.card p { margin: 0; color: var(--muted); font-size: 14px; }
.card .meta { display: flex; flex-wrap: wrap; gap: 6px; }
.tag {
  display: inline-block;
  padding: 2px 8px;
  border-radius: 999px;
  background: var(--chip);
  font: 500 11.5px/1.6 var(--font-mono);
  color: var(--muted);
}
.tag.go { background: color-mix(in srgb, var(--ok) 16%, transparent); color: var(--ok); }
.card:disabled, .card[aria-disabled="true"] { opacity: 0.55; cursor: default; }

.grades { display: grid; grid-template-columns: repeat(auto-fill, minmax(150px, 1fr)); gap: 12px; }
.grade { justify-items: start; }
.grade strong { font: 700 44px/1 var(--font-display); }

.boards { display: flex; flex-wrap: wrap; gap: 6px; padding: 4px; border-radius: 10px; background: var(--chip); width: fit-content; max-width: 100%; }
.boards button { border: 0; background: transparent; padding: 8px 16px; }
.boards button[aria-selected="true"] { background: var(--panel); box-shadow: 0 1px 2px rgba(0, 0, 0, 0.12); }
.board-note { margin: 0; color: var(--muted); font-size: 14px; }

.exp-list { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: repeat(auto-fill, minmax(300px, 1fr)); gap: 12px; }
.exp {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 14px;
  align-items: start;
  padding: 14px 16px;
  border-radius: 12px;
  border: 1px solid var(--line);
  background: var(--panel);
  text-decoration: none;
  min-width: 0;
}
.exp:hover { border-color: var(--chem); }
.exp .num { font: 600 13px/1 var(--font-mono); color: var(--muted); font-variant-numeric: tabular-nums; padding-top: 3px; }
.exp h3 { margin: 0 0 4px; font: 600 17px/1.25 var(--font-body); }
.exp .vial { width: 14px; height: 34px; border-radius: 3px 3px 8px 8px; border: 1.5px solid var(--line); position: relative; overflow: hidden; margin-top: 2px; }
.exp .vial i { position: absolute; left: 0; right: 0; bottom: 0; height: 55%; background: var(--c); }
.exp .left { display: grid; justify-items: center; gap: 8px; }

/* ================================================================ lab */
.app {
  height: 100%;
  display: grid;
  grid-template-columns: minmax(320px, 420px) 1fr;
}
.rail {
  min-width: 0;
  display: flex;
  flex-direction: column;
  gap: 16px;
  overflow-y: auto;
  background: var(--panel);
  border-right: 1px solid var(--line);
  padding-block: 16px 20px;
  padding-left: max(18px, env(safe-area-inset-left, 0px));
  padding-right: 18px;
  font-size: 14px;
}
.rail > * { flex-shrink: 0; }
.rail h1 { margin: 4px 0 0; font: 600 23px/1.15 var(--font-display); text-wrap: balance; }
.progress { height: 3px; background: var(--line); border-radius: 2px; overflow: hidden; }
.progress i { display: block; height: 100%; width: 0; background: var(--chem); transition: width 0.4s; }
.stepcard { display: grid; gap: 10px; padding: 14px; border-radius: 10px; border: 1px solid var(--chem); background: color-mix(in srgb, var(--chem) 6%, transparent); }
.stepcard p { margin: 0; }
.stepcard .do { font-size: 15px; }
.stepcard .row { display: flex; gap: 8px; flex-wrap: wrap; align-items: center; }
.stepcard.done { border-color: var(--ok); background: color-mix(in srgb, var(--ok) 7%, transparent); }
.see { padding: 10px 12px; border-radius: 8px; background: var(--chip); }
.see b { display: block; font: 600 10.5px var(--font-mono); text-transform: uppercase; letter-spacing: 0.08em; color: var(--chem); margin-bottom: 2px; }
.log { margin: 0; padding-left: 20px; display: grid; gap: 8px; }
.log li::marker { font: 500 12px var(--font-mono); color: var(--muted); }
.log .d { color: var(--muted); font-size: 13px; }
details.sec { border-top: 1px solid var(--line); padding-top: 10px; }
details.sec > summary { cursor: pointer; font: 600 12px var(--font-mono); text-transform: uppercase; letter-spacing: 0.08em; color: var(--muted); list-style-position: outside; }
details.sec[open] > summary { margin-bottom: 8px; }
details.sec p, details.sec ul, details.sec ol { margin: 0; max-width: 62ch; }
details.sec ul, details.sec ol { padding-left: 20px; display: grid; gap: 4px; }
.table-wrap { overflow-x: auto; }
table { border-collapse: collapse; width: 100%; font-size: 13px; }
th, td { text-align: left; padding: 6px 10px 6px 0; border-bottom: 1px solid var(--line); vertical-align: top; }
th { font: 600 10.5px var(--font-mono); text-transform: uppercase; letter-spacing: 0.06em; color: var(--muted); }
tr.hidden td { color: transparent; text-shadow: 0 0 6px color-mix(in srgb, var(--muted) 60%, transparent); user-select: none; }
.eqs { list-style: none; padding: 0 !important; }
.eqs li { font: 500 13px/1.6 var(--font-mono); padding: 6px 10px; border-radius: 6px; background: var(--chip); overflow-x: auto; white-space: nowrap; }
.locked { display: grid; gap: 8px; justify-items: start; color: var(--muted); }
.result { padding: 10px 12px; border-left: 3px solid var(--ok); background: color-mix(in srgb, var(--ok) 8%, transparent); border-radius: 0 6px 6px 0; }
.navx { display: flex; justify-content: space-between; gap: 8px; flex-wrap: wrap; margin-top: auto; }
.navx a { font-size: 13px; }

.stage { position: relative; min-width: 0; min-height: 0; overflow: hidden; background: var(--scene); }
.stage canvas.gl { display: block; width: 100%; height: 100%; touch-action: none; }
.labels { position: absolute; inset: 0; pointer-events: none; }
.tools { position: absolute; top: 12px; right: max(12px, env(safe-area-inset-right, 0px)); display: flex; gap: 6px; }
.tools button { background: color-mix(in srgb, var(--panel) 88%, transparent); backdrop-filter: blur(6px); font-size: 12.5px; padding: 6px 10px; }
.clock {
  position: absolute;
  top: 14px;
  left: 50%;
  transform: translateX(-50%);
  padding: 7px 14px;
  border-radius: 999px;
  background: var(--ink);
  color: var(--bg);
  font: 600 13px var(--font-mono);
  pointer-events: none;
}
.callout {
  position: absolute;
  left: 50%;
  bottom: 18px;
  transform: translateX(-50%);
  width: min(560px, calc(100% - 32px));
  padding: 10px 14px;
  border-radius: 10px;
  background: color-mix(in srgb, var(--panel) 94%, transparent);
  border: 1px solid var(--line);
  backdrop-filter: blur(6px);
  box-shadow: 0 6px 18px rgba(0, 0, 0, 0.12);
}
.callout b { display: block; font: 600 10.5px var(--font-mono); text-transform: uppercase; letter-spacing: 0.08em; color: var(--chem); }
.vlabel {
  padding: 2px 7px;
  border-radius: 4px;
  background: rgba(12, 18, 16, 0.78);
  color: #fff;
  font: 600 11.5px/1.4 var(--font-mono);
  white-space: nowrap;
  pointer-events: none;
}
.vlabel.small { font-size: 10.5px; padding: 1px 5px; }
.vlabel.temp { background: #b8352b; }
.vlabel.add { background: #1f6fa8; }
.vlabel.row { background: transparent; color: var(--ink); font-size: 12px; }
.loading { position: absolute; inset: 0; display: grid; place-content: center; font: 500 13px var(--font-mono); color: var(--muted); background: var(--scene); }

@media (max-width: 760px) {
  .hero { grid-template-columns: 1fr; padding-block: 8px; }
  .app { grid-template-columns: 1fr; grid-template-rows: minmax(0, 1fr) auto; }
  .stage { grid-row: 1; }
  .rail {
    grid-row: 2;
    max-height: 52vh;
    border-right: 0;
    border-top: 1px solid var(--line);
    padding-left: max(16px, env(safe-area-inset-left, 0px));
    padding-right: max(16px, env(safe-area-inset-right, 0px));
  }
  .callout { bottom: 10px; font-size: 13px; }
}
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation: none !important; transition: none !important; }
}