/* if_lab shared base — text-first, quiet, dark reading theme */
:root {
  --bg: #101114;
  --bg-raised: #17181c;
  --bg-inset: #0b0c0e;
  --ink: #d6d7db;
  --ink-dim: #8b8d94;
  --ink-faint: #55575e;
  --accent: #e0b458;      /* warm lamp-light */
  --accent-dim: #9a7d3f;
  --danger: #c96856;
  --ok: #7fa86a;
  --link: #9db4d0;
  --border: #26272c;
  --mono: ui-monospace, "Cascadia Code", Consolas, "SF Mono", Menlo, monospace;
  --sans: "Inter", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  --measure: 66ch;
}

* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 17px;
  line-height: 1.65;
}

a { color: var(--link); text-decoration: none; border-bottom: 1px solid color-mix(in srgb, var(--link) 35%, transparent); }
a:hover { border-bottom-color: var(--link); }

::selection { background: color-mix(in srgb, var(--accent) 30%, transparent); }

/* Lab chrome: small top bar every experiment shares.
   Pinned to fixed dark values (not tokens) on purpose: experiments retheme the page
   via token overrides, but the lab frame stays constant — same instrument, new specimen. */
.lab-bar {
  display: flex;
  align-items: baseline;
  gap: 1rem;
  padding: 0.6rem 1.1rem;
  font-size: 0.78rem;
  font-family: var(--mono);
  color: #55575e;
  border-bottom: 1px solid #26272c;
  background: #0b0c0e;
}
.lab-bar a { color: #8b8d94; border-bottom: none; }
.lab-bar a:hover { color: #d6d7db; }
.lab-bar .lab-bar-title { color: #8b8d94; letter-spacing: 0.04em; }
.lab-bar .lab-bar-spacer { flex: 1; }

.btn {
  font: inherit;
  font-size: 0.9rem;
  color: var(--ink);
  background: var(--bg-raised);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 0.45rem 0.9rem;
  cursor: pointer;
}
.btn:hover { border-color: var(--ink-faint); }
.btn:disabled { opacity: 0.4; cursor: default; }
.btn.primary { border-color: var(--accent-dim); color: var(--accent); }
.btn.primary:hover { border-color: var(--accent); }

input[type="text"], textarea {
  font: inherit;
  color: var(--ink);
  background: var(--bg-inset);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 0.5rem 0.75rem;
}
input[type="text"]:focus, textarea:focus { outline: none; border-color: var(--accent-dim); }

.dim { color: var(--ink-dim); }
.faint { color: var(--ink-faint); }
.mono { font-family: var(--mono); }

@media (max-width: 600px) {
  body { font-size: 16px; }
}