/* =====================================================================
   ML_LAB — shared design system
   ---------------------------------------------------------------------
   One source of truth for the chrome that wraps every page: the header,
   the footer, and the command palette. Tool pages keep their own canvas
   (some are light, some dark); this file only styles the frame around
   them, so nothing here may leak into a page's own markup.

   Every selector is namespaced `lab-`. Do not add bare element selectors.
   ===================================================================== */

:root {
  /* Ground */
  --lab-ink-950: #050810;
  --lab-ink-900: #080c16;
  --lab-ink-850: #0a0f1b;
  --lab-ink-800: #0c1220;
  --lab-ink-750: #121b2c;
  --lab-ink-700: #162034;

  /* Lines */
  --lab-line: #1b2334;
  --lab-line-strong: #253048;
  --lab-line-loud: #2b3853;

  /* Text */
  --lab-text: #e9eef6;
  --lab-text-2: #94a3b8;
  --lab-text-3: #64748b;
  --lab-text-4: #4d5a73;

  /* Accent */
  --lab-amber: #f5a623;
  --lab-amber-hi: #ffc868;
  --lab-amber-ink: #060912;
  --lab-amber-wash: rgba(245, 166, 35, 0.12);

  /* Type */
  --lab-mono: "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, monospace;
  --lab-serif: "Instrument Serif", Georgia, "Times New Roman", serif;

  /* Shape */
  --lab-r-sm: 6px;
  --lab-r: 10px;
  --lab-r-lg: 14px;

  --lab-header-h: 62px;
}

/* ---------------------------------------------------------------- *
 * Reset, scoped
 * ---------------------------------------------------------------- */
.lab-chrome *,
.lab-chrome *::before,
.lab-chrome *::after { box-sizing: border-box; }

.lab-chrome button,
.lab-chrome input {
  font: inherit;
  color: inherit;
  margin: 0;
}

.lab-chrome :focus-visible {
  outline: 2px solid var(--lab-amber);
  outline-offset: 2px;
  border-radius: var(--lab-r-sm);
}

/* Skip link — keyboard users land here first */
.lab-skip {
  position: absolute;
  left: 12px;
  top: -60px;
  z-index: 10001;
  background: var(--lab-amber);
  color: var(--lab-amber-ink);
  font-family: var(--lab-mono);
  font-size: 12px;
  font-weight: 600;
  padding: 10px 16px;
  border-radius: var(--lab-r-sm);
  text-decoration: none;
  transition: top 0.15s ease;
}
.lab-skip:focus { top: 12px; }

/* ---------------------------------------------------------------- *
 * Header
 * ---------------------------------------------------------------- */
.lab-header {
  position: sticky;
  top: 0;
  z-index: 9998;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  min-height: var(--lab-header-h);
  padding: 0 24px;
  background: var(--lab-ink-900);
  border-bottom: 1px solid var(--lab-line);
  font-family: var(--lab-mono);
  color: var(--lab-text);
  -webkit-font-smoothing: antialiased;
}

.lab-brand {
  display: flex;
  align-items: center;
  gap: 11px;
  text-decoration: none;
  color: var(--lab-text);
  flex-shrink: 0;
}
.lab-brand:hover .lab-brand__name { color: var(--lab-amber); }

.lab-brand__mark {
  width: 26px;
  height: 26px;
  border-radius: 5px;
  background: var(--lab-amber);
  display: grid;
  place-items: center;
  flex-shrink: 0;
}
.lab-brand__name {
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.06em;
  transition: color 0.15s ease;
}
.lab-brand__by {
  font-size: 10px;
  letter-spacing: 0.14em;
  color: var(--lab-text-4);
  white-space: nowrap;
}

.lab-nav {
  display: flex;
  align-items: center;
  gap: 22px;
  margin-left: auto;
}
.lab-nav a {
  font-size: 11px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--lab-text-2);
  text-decoration: none;
  white-space: nowrap;
  transition: color 0.15s ease;
}
.lab-nav a:hover,
.lab-nav a[aria-current="page"] { color: var(--lab-amber); }

/* Search trigger */
.lab-search {
  display: flex;
  align-items: center;
  gap: 9px;
  padding: 7px 10px;
  min-width: 220px;
  background: var(--lab-ink-800);
  border: 1px solid var(--lab-line-strong);
  border-radius: var(--lab-r-sm);
  color: var(--lab-text-3);
  font-size: 11.5px;
  cursor: pointer;
  transition: border-color 0.15s ease, color 0.15s ease;
}
.lab-search:hover {
  border-color: var(--lab-line-loud);
  color: var(--lab-text-2);
}
.lab-search__label { flex: 1 1 auto; text-align: left; }

.lab-kbd {
  font-family: var(--lab-mono);
  font-size: 10px;
  line-height: 1;
  padding: 3px 5px;
  border: 1px solid var(--lab-line-loud);
  border-radius: 3px;
  color: var(--lab-text-2);
  background: var(--lab-ink-750);
  white-space: nowrap;
}

/* Breadcrumb strip on tool pages */
.lab-crumb {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 9px 24px;
  background: var(--lab-ink-950);
  border-bottom: 1px solid var(--lab-line);
  font-family: var(--lab-mono);
  font-size: 11px;
  color: var(--lab-text-3);
}
.lab-crumb a { color: var(--lab-text-2); text-decoration: none; }
.lab-crumb a:hover { color: var(--lab-amber); text-decoration: underline; text-underline-offset: 3px; }
.lab-crumb__sep { color: var(--lab-text-4); }
.lab-crumb__here { color: var(--lab-text); }

/* ---------------------------------------------------------------- *
 * Footer
 * ---------------------------------------------------------------- */
.lab-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 14px;
  padding: 20px 24px;
  background: var(--lab-ink-900);
  border-top: 1px solid var(--lab-line);
  font-family: var(--lab-mono);
  font-size: 10.5px;
  color: var(--lab-text-3);
}
.lab-footer a { color: var(--lab-text-3); text-decoration: none; }
.lab-footer a:hover { color: var(--lab-amber); }
.lab-footer__links { display: flex; gap: 18px; letter-spacing: 0.1em; text-transform: uppercase; }

/* ---------------------------------------------------------------- *
 * "About this playbook" band
 * Sits between a tool's own canvas and the footer. Gives every page
 * real, indexable prose — the interactive apps render nothing a
 * crawler can read.
 * ---------------------------------------------------------------- */
.lab-about {
  background: var(--lab-ink-950);
  border-top: 1px solid var(--lab-line);
  padding: 44px 24px 48px;
  font-family: var(--lab-mono);
  color: var(--lab-text-2);
}

.lab-about__inner {
  max-width: 1160px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1.5fr 1fr;
  gap: 48px;
  align-items: start;
}

.lab-about__label {
  font-size: 10.5px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--lab-text-4);
  margin-bottom: 14px;
}

.lab-about h2 {
  font-family: var(--lab-serif);
  font-weight: 400;
  font-size: 30px;
  line-height: 1.18;
  margin: 0 0 14px;
  color: var(--lab-text);
}

.lab-about p {
  font-size: 13px;
  line-height: 1.8;
  margin: 0 0 12px;
  max-width: 620px;
  color: var(--lab-text-2);
}

.lab-about__facts {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 18px;
}

.lab-about__fact {
  font-size: 10.5px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--lab-text-3);
  border: 1px solid var(--lab-line-strong);
  border-radius: 999px;
  padding: 5px 12px;
}

.lab-about__side h3 {
  font-size: 10.5px;
  font-weight: 600;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--lab-text-4);
  margin: 0 0 12px;
}

.lab-about__list { list-style: none; margin: 0 0 26px; padding: 0; }
.lab-about__list li { margin-bottom: 9px; line-height: 1.5; }
.lab-about__list a {
  font-size: 12.5px;
  color: var(--lab-text);
  text-decoration: none;
  border-bottom: 1px solid var(--lab-line-strong);
  padding-bottom: 1px;
}
.lab-about__list a:hover { color: var(--lab-amber); border-bottom-color: var(--lab-amber); }
.lab-about__list span { display: block; font-size: 11px; color: var(--lab-text-4); margin-top: 2px; }

.lab-about__by { font-size: 11.5px; line-height: 1.7; color: var(--lab-text-3); }
.lab-about__by a { color: var(--lab-text-2); text-decoration: underline; text-underline-offset: 3px; }
.lab-about__by a:hover { color: var(--lab-amber); }

@media (max-width: 860px) {
  .lab-about__inner { grid-template-columns: 1fr; gap: 32px; }
  .lab-about { padding: 34px 16px 38px; }
}

/* ---------------------------------------------------------------- *
 * Command palette
 * ---------------------------------------------------------------- */
.lab-palette-backdrop {
  position: fixed;
  inset: 0;
  z-index: 10000;
  background: rgba(4, 7, 14, 0.76);
  backdrop-filter: blur(3px);
  display: flex;
  align-items: flex-start;
  justify-content: center;
  padding: 10vh 20px 20px;
  font-family: var(--lab-mono);
}
.lab-palette-backdrop[hidden] { display: none; }

.lab-palette {
  width: min(660px, 100%);
  max-height: 72vh;
  display: flex;
  flex-direction: column;
  background: var(--lab-ink-800);
  border: 1px solid var(--lab-line-loud);
  border-radius: 12px;
  box-shadow: 0 28px 64px rgba(0, 0, 0, 0.6);
  overflow: hidden;
  color: var(--lab-text);
}

.lab-palette__search {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 15px 18px;
  border-bottom: 1px solid var(--lab-line);
  flex-shrink: 0;
}
.lab-palette__input {
  flex: 1 1 auto;
  background: transparent;
  border: 0;
  outline: 0;
  font-size: 14px;
  color: var(--lab-text);
}
.lab-palette__input::placeholder { color: var(--lab-text-4); }

.lab-palette__filters {
  display: flex;
  gap: 6px;
  padding: 10px 18px;
  border-bottom: 1px solid var(--lab-line);
  flex-wrap: wrap;
  flex-shrink: 0;
}
.lab-chip {
  font-family: var(--lab-mono);
  font-size: 10px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  padding: 5px 11px;
  border-radius: 999px;
  border: 1px solid var(--lab-line-strong);
  background: transparent;
  color: var(--lab-text-2);
  cursor: pointer;
  transition: all 0.12s ease;
}
.lab-chip:hover { border-color: var(--lab-line-loud); color: var(--lab-text); }
.lab-chip[aria-pressed="true"] {
  background: var(--lab-amber);
  border-color: var(--lab-amber);
  color: var(--lab-amber-ink);
}

.lab-palette__results {
  overflow-y: auto;
  padding: 8px 0;
  flex: 1 1 auto;
  min-height: 0;
}
.lab-palette__group {
  padding: 10px 18px 6px;
  font-size: 9.5px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--lab-text-4);
}

.lab-hit {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 10px 18px;
  text-decoration: none;
  color: inherit;
  border-left: 2px solid transparent;
  cursor: pointer;
}
.lab-hit:hover { background: rgba(255, 255, 255, 0.03); }
.lab-hit[data-active="true"] {
  background: var(--lab-ink-700);
  border-left-color: var(--lab-amber);
}
.lab-hit__kind {
  flex: 0 0 76px;
  font-size: 9.5px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--lab-text-4);
}
.lab-hit[data-active="true"] .lab-hit__kind { color: var(--lab-amber); }
.lab-hit__body { flex: 1 1 auto; min-width: 0; }
.lab-hit__title {
  display: block;
  font-size: 13px;
  color: var(--lab-text);
  margin-bottom: 2px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.lab-hit__path {
  display: block;
  font-size: 11px;
  color: var(--lab-text-2);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.lab-hit mark {
  background: var(--lab-amber-wash);
  color: var(--lab-amber-hi);
  border-radius: 2px;
  padding: 0 1px;
}
.lab-hit__chevron { flex: 0 0 auto; color: var(--lab-text-4); }

.lab-palette__empty {
  padding: 34px 18px;
  text-align: center;
  font-size: 12.5px;
  color: var(--lab-text-3);
  line-height: 1.7;
}

.lab-palette__hints {
  display: flex;
  gap: 18px;
  flex-wrap: wrap;
  padding: 10px 18px;
  border-top: 1px solid var(--lab-line);
  font-size: 10px;
  color: var(--lab-text-4);
  flex-shrink: 0;
}
.lab-palette__hints .lab-kbd { font-size: 9px; padding: 1px 4px; }

/* ---------------------------------------------------------------- *
 * Narrow screens
 * ---------------------------------------------------------------- */
@media (max-width: 900px) {
  .lab-nav { display: none; }
  .lab-search { min-width: 0; flex: 1 1 auto; }
  .lab-search__label { display: none; }
  .lab-brand__by { display: none; }
}

@media (max-width: 560px) {
  .lab-header { padding: 0 14px; gap: 12px; }
  .lab-crumb { padding: 9px 14px; }
  .lab-footer { padding: 18px 14px; }
  .lab-palette-backdrop { padding: 6vh 12px 12px; }
  .lab-hit__kind { display: none; }
}

@media (prefers-reduced-motion: reduce) {
  .lab-chrome * { transition: none !important; animation: none !important; }
}