/* Design Laboratory — shared foundations (tokens + primitives)
 * Link from product previews: ../../01-foundations/core.css
 * Themes: Operator Dark · Archive Light · Studio · Terminal
 * Pipeline: Idea → UI Lab → Review → Port → Ship
 */

:root {
  color-scheme: dark;

  /* Surfaces — neutral blue-black with a touch more lift for depth */
  --bg: #0a0d12;
  --panel: #121821;
  --panel-raised: #1a212b;
  --line: rgba(255, 255, 255, 0.10);
  --line-soft: rgba(255, 255, 255, 0.055);

  /* Typography */
  --font-body: -apple-system, BlinkMacSystemFont, "SF Pro Text", "Helvetica Neue", Arial, sans-serif;
  --font-mono: "SF Mono", "SFMono-Regular", ui-monospace, Menlo, Monaco, Consolas, monospace;

  /* Ink — brighter muted/dim for small mono text readability */
  --ink: #eef3f8;
  --muted: #b6c0cc;
  --dim: #8590a0;

  /* Semantic status — slightly desaturated to sit behind the lab accent */
  --ok: #7ec9a8;
  --warn: #ecbb56;
  --danger: #ec7272;

  /* Spacing */
  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-5: 24px;
  --space-6: 32px;

  --radius: 6px;
  --max: 1240px;

  /* Lab accent — saturated indigo, reads as a confident brand signal */
  --lab-accent: #6f8aff;
  --lab-accent-soft: rgba(111, 138, 255, 0.14);
  /* Signal — warm amber-orange, pops against the cool indigo */
  --lab-signal: #f59e6b;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: var(--font-body);
  font-size: 15px;
  line-height: 1.5;
  color: var(--ink);
  background:
    radial-gradient(circle at 14% -8%, var(--lab-accent-soft), transparent 38vw),
    radial-gradient(circle at 86% 108%, rgba(111, 138, 255, 0.07), transparent 32vw),
    linear-gradient(90deg, rgba(255, 255, 255, 0.02) 1px, transparent 1px),
    linear-gradient(180deg, rgba(255, 255, 255, 0.015) 1px, transparent 1px),
    var(--bg);
  background-size: auto, auto, 72px 72px, 72px 72px, auto;
}

a {
  color: inherit;
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

button {
  font: inherit;
  cursor: pointer;
}

/* Lab chrome */

.lab-banner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  padding: var(--space-2) var(--space-4);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--dim);
  background: rgba(0, 0, 0, 0.45);
  border-bottom: 1px solid var(--line);
}

.lab-banner strong {
  color: var(--warn);
  font-weight: 600;
}

.lab-banner a {
  color: var(--muted);
  text-decoration: none;
}

.lab-banner a:hover {
  color: var(--ink);
  text-decoration: none;
}

.lab-shell {
  width: min(var(--max), calc(100vw - var(--space-6)));
  margin: 0 auto;
  padding: var(--space-6) var(--space-4) var(--space-6);
}

.lab-header {
  margin-bottom: var(--space-6);
}

.lab-eyebrow {
  margin: 0 0 var(--space-2);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--dim);
}

.lab-title {
  margin: 0 0 var(--space-3);
  font-size: clamp(1.6rem, 4vw, 2.2rem);
  font-weight: 800;
  letter-spacing: -0.02em;
}

.lab-lead {
  margin: 0;
  max-width: 62ch;
  color: var(--muted);
}

.lab-section {
  margin-bottom: var(--space-6);
}

.lab-section h2 {
  margin: 0 0 var(--space-3);
  font-size: 0.85rem;
  font-weight: 700;
  font-family: var(--font-mono);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--dim);
}

.lab-card {
  padding: var(--space-4);
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.lab-card p {
  margin: 0 0 var(--space-3);
  color: var(--muted);
}

.lab-card p:last-child {
  margin-bottom: 0;
}

.lab-card code,
.lab-serve code {
  font-family: var(--font-mono);
  font-size: 0.9em;
  color: var(--ink);
}

.lab-serve {
  padding: var(--space-4);
  font-family: var(--font-mono);
  font-size: 13px;
  line-height: 1.7;
  background: var(--panel-raised);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow-x: auto;
}

.preview-grid {
  display: grid;
  gap: var(--space-4);
}

@media (min-width: 640px) {
  .preview-grid {
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  }
}

.preview-card {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  padding: var(--space-4);
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  transition: border-color 0.15s ease;
}

.preview-card:hover {
  border-color: rgba(255, 255, 255, 0.16);
  text-decoration: none;
}

.preview-card-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
}

.preview-card-title {
  margin: 0;
  font-size: 1.1rem;
  font-weight: 700;
}

.preview-card-tag {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--dim);
  padding: 2px 8px;
  border: 1px solid var(--line);
  border-radius: 999px;
}

.preview-card-desc {
  margin: 0;
  color: var(--muted);
  font-size: 0.92rem;
}

.preview-card-meta {
  margin-top: auto;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--dim);
}

.lab-footer {
  margin-top: var(--space-6);
  padding-top: var(--space-4);
  border-top: 1px solid var(--line-soft);
  font-size: 0.9rem;
  color: var(--dim);
}

.lab-rule-list {
  margin: 0;
  padding-left: 1.2rem;
  color: var(--muted);
}

.lab-rule-list li {
  margin-bottom: var(--space-2);
}

/* Shared component primitives */

.panel {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
}

.panel-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: var(--space-3);
  padding: var(--space-3) var(--space-4);
  border-bottom: 1px solid var(--line-soft);
}

.panel-title {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.panel-title::before {
  content: "▮ ";
  opacity: 0.85;
}

.panel-note {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--dim);
}

.panel-body {
  padding: var(--space-4);
}

.chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 3px 10px;
  font-family: var(--font-mono);
  font-size: 10px;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.03);
}

.chip::before {
  content: "";
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--dim);
}

.chip--ok {
  color: var(--ok);
  border-color: rgba(120, 199, 165, 0.35);
  background: rgba(120, 199, 165, 0.08);
}

.chip--ok::before {
  background: var(--ok);
}

.chip--warn {
  color: var(--warn);
  border-color: rgba(232, 184, 74, 0.35);
  background: rgba(232, 184, 74, 0.08);
}

.chip--warn::before {
  background: var(--warn);
}

.chip--dim {
  color: var(--dim);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: 8px 14px;
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--ink);
  background: var(--panel-raised);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.btn:hover {
  border-color: rgba(255, 255, 255, 0.18);
}

.btn--primary {
  color: #061423;
  background: var(--lab-accent);
  border-color: transparent;
}

.mono-label {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--dim);
}

/* Inner studio pages (galleries, palettes) */

.studio-page {
  width: min(1100px, calc(100vw - 32px));
  margin: 0 auto;
  padding: var(--space-5) var(--space-4) var(--space-6);
}

.studio-page h1 {
  margin: 0 0 var(--space-2);
  font-size: 1.6rem;
  font-weight: 800;
  letter-spacing: -0.02em;
}

.studio-lead {
  margin: 0 0 var(--space-5);
  max-width: 58ch;
  color: var(--muted);
  line-height: 1.6;
}

.studio-grid {
  display: grid;
  gap: var(--space-4);
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
}

.studio-card {
  display: block;
  padding: var(--space-4);
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  text-decoration: none;
  color: inherit;
}

.studio-card:hover {
  border-color: rgba(111, 138, 255, 0.3);
  text-decoration: none;
}

.studio-card h3 {
  margin: 0 0 var(--space-2);
  font-size: 1rem;
  font-weight: 700;
}

.studio-card p {
  margin: 0;
  font-size: 0.88rem;
  color: var(--muted);
  line-height: 1.5;
}

.studio-section {
  margin-bottom: var(--space-6);
}

.studio-section h2 {
  margin: 0 0 var(--space-3);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--dim);
}