/* ============================================================================
   KLAXON — kit.css  (all block + component styles, built on tokens.css)
   Hi-vis safety-coded operational manual. Document chrome, 2px borders.
   ============================================================================ */

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

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--surface-base);
  color: var(--text-primary);
  font-family: var(--font-grotesque);
  font-size: var(--fs-body);
  line-height: var(--lh-body);
  -webkit-font-smoothing: antialiased;
  transition: background var(--dur-med) var(--ease-std), color var(--dur-med) var(--ease-std);
}

img { max-width: 100%; display: block; }
a { color: var(--clause-color); text-decoration: none; }
a:hover { text-decoration: underline; }

/* ---- Typography helpers ------------------------------------------------- */
.h-display, .h1, .h2, .h3, .h4 {
  font-family: var(--font-grotesque);
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.01em;
  line-height: var(--lh-tight);
  margin: 0;
}
.h-display { font-size: var(--fs-display); letter-spacing: -0.01em; }
.h1 { font-size: var(--fs-h1); }
.h2 { font-size: var(--fs-h2); }
.h3 { font-size: var(--fs-h3); line-height: var(--lh-snug); }
.h4 { font-size: var(--fs-h4); line-height: var(--lh-snug); }
.lead { font-size: var(--fs-lead); color: var(--text-secondary); line-height: 1.5; margin: 0; }
.body { color: var(--text-secondary); }
.muted { color: var(--text-muted); }

.mono {
  font-family: var(--font-mono);
  letter-spacing: var(--tracking-mono);
  font-size: var(--fs-micro);
}

.eyebrow {
  font-family: var(--font-mono);
  font-size: var(--fs-eyebrow);
  letter-spacing: var(--tracking-wide);
  text-transform: uppercase;
  color: var(--text-muted);
  display: inline-flex;
  align-items: center;
  gap: var(--sp-2);
}
.eyebrow::before {
  content: "";
  width: 22px; height: 2px;
  background: var(--accent);
  display: inline-block;
}

/* Clause number badge (doc chrome) */
.clause {
  font-family: var(--font-mono);
  font-size: var(--fs-micro);
  color: var(--accent-ink);
  letter-spacing: var(--tracking-mono);
  font-weight: 600;
}

/* ---- Layout ------------------------------------------------------------- */
.wrap { max-width: var(--maxw); margin: 0 auto; padding: 0 var(--sp-5); }
.section { padding: var(--sp-9) 0; }
.section--tight { padding: var(--sp-7) 0; }
.stack > * + * { margin-top: var(--sp-4); }
.grid { display: grid; gap: var(--sp-5); }

/* ============================================================================
   TOPBAR — one coherent bar
   ============================================================================ */
.topbar {
  position: sticky; top: 0; z-index: 100;
  height: var(--header-h);
  background: var(--topbar-bg);
  border-bottom: var(--bw-struct) solid var(--topbar-border);
  display: flex; align-items: center;
}
.topbar__inner {
  max-width: var(--maxw); margin: 0 auto; width: 100%;
  padding: 0 var(--sp-5);
  display: flex; align-items: center; gap: var(--sp-5);
}
.brand { display: flex; align-items: center; gap: var(--sp-3); min-width: 0; }
.brand__name {
  font-weight: 800; text-transform: uppercase; letter-spacing: 0.06em;
  font-size: 0.98rem; white-space: nowrap;
}
.brand__rev {
  font-family: var(--font-mono); font-size: 0.66rem;
  color: var(--text-muted); letter-spacing: var(--tracking-mono);
}
.topbar__spacer { flex: 1; }

/* Emblem — clean ring + optically-centered triangle + accent core */
.emblem { width: 30px; height: 30px; flex: 0 0 auto; display: block; }

/* Controls cluster */
.controls { display: flex; align-items: center; gap: var(--sp-3); }
.seg {
  display: inline-flex; border: var(--bw-struct) solid var(--border-struct);
  border-radius: var(--radius-1); overflow: hidden;
  background: var(--surface-base);
}
.seg__btn {
  font-family: var(--font-mono); font-size: 0.68rem; letter-spacing: 0.04em;
  text-transform: uppercase; padding: 6px 10px; border: 0; cursor: pointer;
  background: transparent; color: var(--text-secondary);
  transition: background var(--dur-fast), color var(--dur-fast);
  white-space: nowrap;
}
.seg__btn + .seg__btn { border-left: var(--bw-hair) solid var(--border-hair); }
.seg__btn[aria-pressed="true"] {
  background: var(--accent); color: var(--accent-contrast); font-weight: 700;
}
.seg__btn:hover:not([aria-pressed="true"]) { background: var(--surface-overlay); }

.toggle-theme {
  display: inline-flex; align-items: center; gap: var(--sp-2);
  font-family: var(--font-mono); font-size: 0.68rem; letter-spacing: 0.04em;
  text-transform: uppercase; cursor: pointer;
  border: var(--bw-struct) solid var(--border-struct);
  background: var(--surface-base); color: var(--text-primary);
  padding: 7px 12px; border-radius: var(--radius-1);
}
.toggle-theme:hover { border-color: var(--accent); }
.toggle-theme__dot {
  width: 10px; height: 10px; border-radius: 50%; background: var(--accent);
  box-shadow: 0 0 0 2px var(--surface-base), 0 0 8px var(--accent);
}

/* ============================================================================
   BUTTONS
   ============================================================================ */
.btn {
  display: inline-flex; align-items: center; gap: var(--sp-2);
  font-family: var(--font-grotesque); font-weight: 700;
  text-transform: uppercase; letter-spacing: 0.08em; font-size: 0.82rem;
  padding: 13px 22px; border-radius: var(--radius-1); cursor: pointer;
  border: var(--bw-struct) solid transparent;
  transition: transform var(--dur-fast) var(--ease-snap), box-shadow var(--dur-fast), background var(--dur-fast);
}
.btn:hover { transform: translateY(-1px); }
.btn:active { transform: translateY(0); }
.btn--primary { background: var(--accent); color: var(--accent-contrast); border-color: var(--accent); }
.btn--primary:hover { box-shadow: 0 6px 20px -6px var(--accent); }
.btn--ghost {
  background: transparent; color: var(--btn-ghost-fg);
  border-color: var(--btn-ghost-border);
}
.btn--ghost:hover { border-color: var(--accent); color: var(--accent-ink); }
.btn--sm { padding: 9px 15px; font-size: 0.74rem; }
.btn[disabled] { opacity: 0.45; cursor: not-allowed; transform: none; }

/* Ghost / eyebrow over imagery: scrim-backed for legibility */
.on-image .btn--ghost {
  border-color: rgba(255,255,255,0.6);
  color: #fff;
  background: rgba(14,15,18,0.32);
  backdrop-filter: blur(2px);
}
.on-image .eyebrow { color: rgba(255,255,255,0.92); }
.on-image .eyebrow::before { background: var(--accent); }

/* ============================================================================
   CHIPS / TAGS / BADGES / DIVIDERS
   ============================================================================ */
.chip {
  display: inline-flex; align-items: center; gap: 6px;
  font-family: var(--font-mono); font-size: 0.7rem; letter-spacing: 0.04em;
  text-transform: uppercase; padding: 4px 10px;
  background: var(--chip-bg); border: var(--bw-hair) solid var(--chip-border);
  color: var(--chip-fg); border-radius: var(--radius-1);
}
.tag {
  display: inline-flex; align-items: center; gap: 6px;
  font-family: var(--font-mono); font-size: 0.68rem; font-weight: 600;
  text-transform: uppercase; letter-spacing: 0.06em; padding: 3px 9px;
  border-radius: var(--radius-1); border: var(--bw-struct) solid var(--accent);
  color: var(--accent-ink); background: transparent;
}
.tag--solid { background: var(--accent); color: var(--accent-contrast); border-color: var(--accent); }
.badge-dot { width: 8px; height: 8px; border-radius: 50%; display: inline-block; }
.divider { height: var(--bw-struct); background: var(--border-struct); border: 0; margin: var(--sp-6) 0; }
.divider--accent { background: var(--accent); }

/* Status dots */
.dot-qual { background: var(--status-qualified); }
.dot-assess { background: var(--status-assessment); }
.dot-locked { background: var(--status-locked); }
.dot-info { background: var(--info); }

/* ============================================================================
   PLATES / DATA CARDS (doc chrome)
   ============================================================================ */
.plate {
  background: var(--plate-bg); border: var(--bw-struct) solid var(--plate-border);
  border-radius: var(--radius-1); padding: var(--sp-5);
  box-shadow: var(--shadow-plate);
  position: relative;
}
.plate__header {
  display: flex; justify-content: space-between; align-items: baseline;
  gap: var(--sp-3); margin-bottom: var(--sp-4);
  padding-bottom: var(--sp-3); border-bottom: var(--bw-hair) solid var(--border-hair);
}
.plate__label {
  font-family: var(--font-mono); font-size: 0.68rem; letter-spacing: 0.08em;
  text-transform: uppercase; color: var(--plate-label);
}

/* Corner registration marks for hi-vis doc-chrome feel */
.plate--reg::before, .plate--reg::after {
  content: ""; position: absolute; width: 10px; height: 10px;
  border-color: var(--accent); border-style: solid;
}
.plate--reg::before { top: 6px; left: 6px; border-width: 2px 0 0 2px; }
.plate--reg::after { bottom: 6px; right: 6px; border-width: 0 2px 2px 0; }

/* ============================================================================
   BANDS — complete frames only, theme-aware bg, internal padding
   ============================================================================ */
.band {
  background: var(--band-bg);
  border-top: var(--bw-struct) solid var(--band-border);
  border-bottom: var(--bw-struct) solid var(--band-border);
}
.band--alt { background: var(--band-bg-alt); }
.band--accent {
  background: var(--accent);
  border-color: var(--accent-deep);
}
.band--accent, .band--accent .h2, .band--accent .lead, .band--accent .eyebrow,
.band--accent .muted, .band--accent .mono { color: var(--accent-contrast); }
.band--accent .eyebrow::before { background: var(--accent-contrast); }
.band__inner {
  max-width: var(--maxw); margin: 0 auto;
  padding: var(--sp-8) var(--sp-5);   /* internal padding incl. horizontal */
}

/* ============================================================================
   HERO
   ============================================================================ */
.hero {
  position: relative; min-height: calc(100svh - var(--header-h));
  display: flex; flex-direction: column; justify-content: flex-end;
  overflow: hidden;
  border-bottom: var(--bw-struct) solid var(--border-struct);
}
.hero__media { position: absolute; inset: 0; z-index: 0; background: var(--surface-sunken); }
.hero__img {
  width: 100%; height: 100%; object-fit: cover;
  filter: brightness(var(--img-brightness)) contrast(var(--img-contrast)) saturate(var(--img-saturate));
}
/* Hi-vis duotone treatment via gradient overlay (NO multiply) */
.hero__grade {
  position: absolute; inset: 0; pointer-events: none;
  background:
    linear-gradient(180deg, var(--img-scrim-top) 0%, transparent 30%, var(--img-scrim-bot) 100%),
    linear-gradient(115deg, var(--img-duotone-shadow) 0%, transparent 55%);
  mix-blend-mode: normal;
}
.hero__accent-bar {
  position: absolute; left: 0; right: 0; bottom: 0; height: 5px;
  background: var(--accent); z-index: 2;
}
.hero__content {
  position: relative; z-index: 3;
  max-width: var(--maxw); width: 100%; margin: 0 auto;
  padding: var(--sp-9) var(--sp-5) var(--sp-8);
}
.hero__content .h-display, .hero__content .lead { color: #f4f7fb; }
.hero__content .lead { max-width: 46ch; color: rgba(244,247,251,0.86); }
.hero__meta {
  display: flex; flex-wrap: wrap; gap: var(--sp-3) var(--sp-5); margin-top: var(--sp-5);
  font-family: var(--font-mono); font-size: 0.72rem; color: rgba(244,247,251,0.7);
  letter-spacing: 0.04em;
}
.hero__cta { display: flex; flex-wrap: wrap; gap: var(--sp-3); margin-top: var(--sp-6); }

/* Type-led hero (no image) */
.hero-type {
  min-height: calc(100svh - var(--header-h));
  display: flex; align-items: center;
  background: var(--surface-base);
  border-bottom: var(--bw-struct) solid var(--border-struct);
  background-image:
    linear-gradient(var(--border-hair) 1px, transparent 1px),
    linear-gradient(90deg, var(--border-hair) 1px, transparent 1px);
  background-size: 48px 48px;
}
.hero-type__inner { max-width: var(--maxw); margin: 0 auto; padding: var(--sp-8) var(--sp-5); width: 100%; }

/* ============================================================================
   FOUR PRINCIPLES
   ============================================================================ */
.principles { display: grid; grid-template-columns: repeat(4, 1fr); gap: var(--sp-4); }
.principle {
  border: var(--bw-struct) solid var(--border-struct);
  border-radius: var(--radius-1); padding: var(--sp-5);
  background: var(--surface-raised);
  position: relative; overflow: hidden;
}
.principle::after {
  content: ""; position: absolute; top: 0; left: 0; width: 100%; height: 4px;
  background: var(--accent);
}
.principle__no { font-family: var(--font-mono); font-size: 0.7rem; color: var(--accent-ink); letter-spacing: 0.08em; }
.principle .h4 { margin: var(--sp-3) 0 var(--sp-2); }

/* ============================================================================
   LINEAGE / PROVENANCE — chain of evidence
   ============================================================================ */
.lineage { display: grid; grid-template-columns: 1fr 1fr; gap: var(--sp-6); align-items: center; }
.lineage__chain { display: grid; gap: var(--sp-3); }
.lineage__node {
  display: grid; grid-template-columns: auto 1fr; gap: var(--sp-4); align-items: start;
  padding: var(--sp-4); border: var(--bw-struct) solid var(--border-struct);
  border-radius: var(--radius-1); background: var(--surface-raised);
}
.lineage__year {
  font-family: var(--font-mono); font-weight: 700; color: var(--accent-ink);
  font-size: 0.84rem; letter-spacing: 0.04em; padding-top: 2px;
}
.lineage__media { position: relative; min-height: 320px; border: var(--bw-struct) solid var(--border-struct); overflow: hidden; background: var(--surface-sunken); }

/* Treated image frame (reusable) */
.fig { position: relative; overflow: hidden; background: var(--surface-sunken); border: var(--bw-struct) solid var(--border-struct); }
.fig__img {
  width: 100%; height: 100%; object-fit: cover;
  filter: brightness(var(--img-brightness)) contrast(var(--img-contrast)) saturate(var(--img-saturate));
}
.fig__grade {
  position: absolute; inset: 0; pointer-events: none;
  background:
    linear-gradient(180deg, transparent 40%, var(--img-scrim-bot) 100%),
    linear-gradient(120deg, var(--img-duotone-shadow) 0%, transparent 60%);
}
.fig__reg {
  position: absolute; top: var(--sp-3); left: var(--sp-3);
  font-family: var(--font-mono); font-size: 0.64rem; letter-spacing: 0.06em;
  color: #fff; background: rgba(14,15,18,0.55); padding: 3px 8px;
  border-left: 3px solid var(--accent);
}
.fig__cap {
  position: absolute; bottom: var(--sp-3); left: var(--sp-3); right: var(--sp-3);
  font-family: var(--font-mono); font-size: 0.68rem; color: rgba(244,247,251,0.92);
  letter-spacing: 0.02em;
}

/* ============================================================================
   TRACK CARDS — certify to teach
   ============================================================================ */
.tracks { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--sp-5); }
.track-card {
  border: var(--bw-struct) solid var(--border-struct); border-radius: var(--radius-1);
  background: var(--surface-raised); overflow: hidden; display: flex; flex-direction: column;
  transition: border-color var(--dur-fast);
}
.track-card:hover { border-color: var(--accent); }
.track-card__head {
  padding: var(--sp-4) var(--sp-5);
  border-bottom: var(--bw-struct) solid var(--border-struct);
  display: flex; justify-content: space-between; align-items: center; gap: var(--sp-3);
}
.track-card__code { font-family: var(--font-mono); font-size: 0.7rem; letter-spacing: 0.06em; color: var(--text-muted); }
.track-card__body { padding: var(--sp-5); flex: 1; }
.track-card__band { height: 5px; }

/* Per-track-card fixed colors for the side-by-side card grid (independent of global track) */
.tc-orange { --tc: var(--hv-orange); --tc-ink: var(--hv-orange); }
.tc-yellow { --tc: var(--hv-yellow); --tc-ink: var(--hv-yellow-deep); }
.tc-green  { --tc: var(--hv-green);  --tc-ink: var(--hv-green-deep); }
.tc-cyan   { --tc: var(--hv-cyan);   --tc-ink: var(--hv-cyan-deep); }
[data-theme="dark"] .tc-yellow { --tc-ink: var(--hv-yellow); }
[data-theme="dark"] .tc-green  { --tc-ink: var(--hv-green); }
[data-theme="dark"] .tc-cyan   { --tc-ink: var(--hv-cyan); }
.track-card .track-card__band { background: var(--tc, var(--accent)); }
.track-card .track-card__no { color: var(--tc-ink, var(--accent-ink)); font-family: var(--font-mono); font-size: 0.72rem; }
.track-card:hover { border-color: var(--tc, var(--accent)); }

/* Track FEATURE / header — re-skins per global accent */
.track-feature {
  display: grid; grid-template-columns: 1.1fr 1fr; gap: 0;
  border: var(--bw-struct) solid var(--border-struct); border-radius: var(--radius-1); overflow: hidden;
  background: var(--surface-raised);
}
.track-feature__media { position: relative; min-height: 340px; background: var(--surface-sunken); }
.track-feature__body { padding: var(--sp-7); display: flex; flex-direction: column; justify-content: center; }
.track-feature__name { color: var(--accent-ink); }

/* ============================================================================
   QUALIFICATION LADDER (signature progression mechanic)
   ============================================================================ */
.qual {
  border: var(--bw-struct) solid var(--border-struct); border-radius: var(--radius-1);
  background: var(--surface-raised); overflow: hidden;
}
.qual__head {
  display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: var(--sp-3);
  padding: var(--sp-4) var(--sp-5); border-bottom: var(--bw-struct) solid var(--border-struct);
  background: var(--surface-sunken);
}
.qual__legend { display: flex; flex-wrap: wrap; gap: var(--sp-4); font-family: var(--font-mono); font-size: 0.68rem; color: var(--text-muted); }
.qual__legend span { display: inline-flex; align-items: center; gap: 6px; }
.qual__progress { font-family: var(--font-mono); font-size: 0.72rem; color: var(--text-secondary); }
.qual__progress b { color: var(--accent-ink); }

.rung {
  display: grid; grid-template-columns: 56px 1fr auto; gap: var(--sp-4); align-items: center;
  padding: var(--sp-5); border-bottom: var(--bw-hair) solid var(--border-hair);
  cursor: pointer; background: transparent;
  transition: background var(--dur-fast);
  width: 100%; text-align: left; border-left: 0; border-right: 0; border-top: 0; font: inherit; color: inherit;
}
.rung:last-child { border-bottom: 0; }
.rung:hover { background: var(--surface-overlay); }
.rung:focus-visible { outline: 2px solid var(--accent); outline-offset: -2px; }

.rung__status {
  width: 44px; height: 44px; border-radius: var(--radius-1);
  display: grid; place-items: center; font-family: var(--font-mono); font-weight: 700; font-size: 1.1rem;
  border: var(--bw-struct) solid var(--border-struct); color: var(--text-muted);
}
.rung__code { font-family: var(--font-mono); font-size: 0.68rem; color: var(--text-muted); letter-spacing: 0.06em; }
.rung__title { font-weight: 800; text-transform: uppercase; letter-spacing: 0.02em; font-size: 1.02rem; }
.rung__unlocks { font-family: var(--font-mono); font-size: 0.72rem; color: var(--text-secondary); margin-top: 4px; }
.rung__chev { font-family: var(--font-mono); color: var(--text-muted); font-size: 0.9rem; }

/* status states — color IS the information */
.rung[data-state="qualified"] .rung__status { border-color: var(--status-qualified); color: var(--status-qualified); background: color-mix(in srgb, var(--status-qualified) 12%, transparent); }
.rung[data-state="assessment"] .rung__status { border-color: var(--status-assessment); color: var(--status-assessment); background: color-mix(in srgb, var(--status-assessment) 14%, transparent); }
.rung[data-state="locked"] .rung__status { border-color: var(--status-locked); color: var(--status-locked); }
.rung[data-state="qualified"] { box-shadow: inset 4px 0 0 var(--status-qualified); }
.rung[data-state="assessment"] { box-shadow: inset 4px 0 0 var(--status-assessment); }
.rung[data-state="locked"] { box-shadow: inset 4px 0 0 var(--status-locked-tint); }
.rung[data-state="locked"] .rung__title { color: var(--text-muted); }

/* expandable cleared-to authorization detail */
.rung-detail {
  display: none; padding: 0 var(--sp-5) var(--sp-5) calc(56px + var(--sp-5) + var(--sp-4));
  border-bottom: var(--bw-hair) solid var(--border-hair); background: var(--surface-sunken);
}
.rung-detail[data-open="true"] { display: block; }
.rung-detail:last-child { border-bottom: 0; }
.cleared-list { list-style: none; padding: 0; margin: var(--sp-2) 0 0; display: grid; gap: 6px; }
.cleared-list li {
  font-family: var(--font-mono); font-size: 0.74rem; color: var(--text-secondary);
  display: grid; grid-template-columns: auto 1fr; gap: var(--sp-3); align-items: baseline;
}
.cleared-list li::before { content: "✓"; color: var(--status-qualified); font-weight: 700; }
.rung-detail[data-locked="true"] .cleared-list li::before { content: "—"; color: var(--status-locked-tint); }

/* ============================================================================
   STAT / FOOTPRINT STRIP
   ============================================================================ */
.stats { display: grid; grid-template-columns: repeat(4, 1fr); gap: 0; }
.stat {
  padding: var(--sp-5); border-right: var(--bw-struct) solid var(--border-struct);
}
.stat:last-child { border-right: 0; }
.stat__num { font-family: var(--font-grotesque); font-weight: 800; font-size: 2.4rem; line-height: 1; color: var(--accent-ink); }
.stat__label { font-family: var(--font-mono); font-size: 0.7rem; letter-spacing: 0.06em; text-transform: uppercase; color: var(--text-muted); margin-top: var(--sp-2); }

/* ============================================================================
   CREDENTIAL / ENDORSEMENT / QUOTE
   ============================================================================ */
.quote {
  border-left: var(--bw-heavy) solid var(--accent);
  padding: var(--sp-3) 0 var(--sp-3) var(--sp-6);
}
.quote__text { font-size: 1.5rem; font-weight: 600; line-height: 1.35; }
.quote__by { font-family: var(--font-mono); font-size: 0.74rem; color: var(--text-muted); margin-top: var(--sp-4); letter-spacing: 0.04em; }
.credential {
  display: grid; grid-template-columns: auto 1fr; gap: var(--sp-4); align-items: center;
  padding: var(--sp-4); border: var(--bw-struct) solid var(--border-struct); border-radius: var(--radius-1);
  background: var(--surface-raised);
}
.credential__seal { width: 52px; height: 52px; flex: 0 0 auto; }

/* ============================================================================
   PHOTO + CAPTION
   ============================================================================ */
.photo-caption { display: grid; grid-template-columns: 1.4fr 1fr; gap: var(--sp-6); align-items: stretch; }
.photo-caption .fig { min-height: 360px; }
.caption-block { display: flex; flex-direction: column; justify-content: center; }

/* ============================================================================
   FAQ / ACCORDION
   ============================================================================ */
.faq { border: var(--bw-struct) solid var(--border-struct); border-radius: var(--radius-1); overflow: hidden; background: var(--surface-raised); }
.faq__item { border-bottom: var(--bw-hair) solid var(--border-hair); }
.faq__item:last-child { border-bottom: 0; }
.faq__q {
  width: 100%; text-align: left; background: transparent; border: 0; cursor: pointer;
  padding: var(--sp-5); display: flex; justify-content: space-between; gap: var(--sp-4); align-items: center;
  font-family: var(--font-grotesque); font-weight: 700; font-size: 1rem; color: var(--text-primary);
  text-transform: uppercase; letter-spacing: 0.02em;
}
.faq__q:hover { background: var(--surface-overlay); }
.faq__q .clause { flex: 0 0 auto; }
.faq__sign { font-family: var(--font-mono); color: var(--accent-ink); font-size: 1.2rem; }
.faq__a { display: none; padding: 0 var(--sp-5) var(--sp-5); color: var(--text-secondary); max-width: 70ch; }
.faq__a[data-open="true"] { display: block; }

/* ============================================================================
   CONTENT + MEDIA SPLIT
   ============================================================================ */
.split { display: grid; grid-template-columns: 1fr 1fr; gap: var(--sp-7); align-items: center; }
.split--rev .split__media { order: 2; }
.split__media { min-height: 360px; }

/* ============================================================================
   CTA BAND
   ============================================================================ */
.cta-inner { display: flex; flex-wrap: wrap; justify-content: space-between; align-items: center; gap: var(--sp-6); }
.cta-inner .h2 { max-width: 18ch; }

/* ============================================================================
   FOOTER
   ============================================================================ */
.footer {
  background: var(--surface-sunken);
  border-top: var(--bw-struct) solid var(--border-struct);
  padding: var(--sp-8) 0 var(--sp-6);
}
.footer__grid { display: grid; grid-template-columns: 1.6fr 1fr 1fr 1fr; gap: var(--sp-6); }
.footer__col h5 { font-family: var(--font-mono); font-size: 0.7rem; letter-spacing: 0.1em; text-transform: uppercase; color: var(--text-muted); margin: 0 0 var(--sp-4); }
.footer__col a { display: block; color: var(--text-secondary); padding: 4px 0; font-size: 0.9rem; }
.footer__col a:hover { color: var(--accent-ink); }
.footer__bottom {
  display: flex; flex-wrap: wrap; justify-content: space-between; gap: var(--sp-3);
  margin-top: var(--sp-7); padding-top: var(--sp-5); border-top: var(--bw-hair) solid var(--border-hair);
  font-family: var(--font-mono); font-size: 0.7rem; color: var(--text-muted); letter-spacing: 0.04em;
}

/* ============================================================================
   KIT SHOWCASE — paired light/dark frames + spec board
   ============================================================================ */
.kit-head {
  padding: var(--sp-8) 0 var(--sp-6); border-bottom: var(--bw-struct) solid var(--border-struct);
  background: var(--surface-base);
}
.section-label {
  font-family: var(--font-mono); font-size: 0.72rem; letter-spacing: 0.1em; text-transform: uppercase;
  color: var(--text-muted); display: flex; align-items: center; gap: var(--sp-3); margin-bottom: var(--sp-5);
}
.section-label::before { content: ""; width: 14px; height: 14px; border: 2px solid var(--accent); display: inline-block; }

/* Paired frame — forces a theme regardless of page theme */
.pair { display: grid; grid-template-columns: 1fr 1fr; gap: var(--sp-5); margin-bottom: var(--sp-6); }
.frame {
  border: var(--bw-struct) solid var(--border-struct); border-radius: var(--radius-1); overflow: hidden;
  background: var(--surface-base);
}
.frame__tab {
  font-family: var(--font-mono); font-size: 0.66rem; letter-spacing: 0.08em; text-transform: uppercase;
  padding: 6px 12px; border-bottom: var(--bw-hair) solid var(--border-hair); color: var(--text-muted);
  display: flex; align-items: center; gap: 8px; background: var(--surface-sunken);
}
.frame__body { padding: var(--sp-5); }
/* Each frame paints its own theme surfaces by re-declaring on the data-theme it carries */

/* Spec board ramps */
.ramp { display: grid; grid-template-columns: repeat(auto-fill, minmax(86px,1fr)); gap: var(--sp-2); }
.swatch { border: var(--bw-hair) solid var(--border-hair); border-radius: var(--radius-1); overflow: hidden; }
.swatch__chip { height: 52px; }
.swatch__meta { padding: 6px 8px; font-family: var(--font-mono); font-size: 0.62rem; color: var(--text-muted); background: var(--surface-raised); }
.swatch__meta b { color: var(--text-primary); display: block; font-size: 0.66rem; }

.type-specimen > * { margin: 0 0 var(--sp-3); }
.spec-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px,1fr)); gap: var(--sp-5); }

.scale-row { display: flex; align-items: baseline; gap: var(--sp-4); border-bottom: var(--bw-hair) solid var(--border-hair); padding: var(--sp-3) 0; }
.scale-row .mono { flex: 0 0 130px; color: var(--text-muted); }

/* utility */
.flex { display: flex; }
.flex-wrap { flex-wrap: wrap; }
.gap-3 { gap: var(--sp-3); }
.gap-4 { gap: var(--sp-4); }
.mt-5 { margin-top: var(--sp-5); }
.mt-6 { margin-top: var(--sp-6); }
.center { text-align: center; }
.maxw-prose { max-width: 60ch; }

/* ============================================================================
   MOBILE — zero horizontal overflow at 390px
   ============================================================================ */
@media (max-width: 560px) {
  .topbar { height: auto; }
  .topbar__inner { flex-wrap: wrap; gap: var(--sp-3); padding: var(--sp-3) var(--sp-4); }
  .topbar__spacer { display: none; }
  .controls { flex-wrap: wrap; width: 100%; gap: var(--sp-2); }
  .seg { flex: 1 1 auto; }
  .seg__btn { flex: 1 1 auto; padding: 6px 7px; }
  :root { --header-h: 112px; }

  .wrap, .band__inner, .hero__content, .hero-type__inner, .footer .wrap { padding-left: var(--sp-4); padding-right: var(--sp-4); }
  .band__inner { padding-top: var(--sp-7); padding-bottom: var(--sp-7); }
  .section { padding: var(--sp-7) 0; }

  .principles { grid-template-columns: 1fr 1fr; }
  .tracks { grid-template-columns: 1fr; }
  .lineage, .split, .split--rev, .photo-caption, .track-feature { grid-template-columns: 1fr; }
  .split--rev .split__media { order: 0; }
  .stats { grid-template-columns: 1fr 1fr; }
  .stat { border-right: 0; border-bottom: var(--bw-struct) solid var(--border-struct); }
  .stat:nth-child(odd) { border-right: var(--bw-struct) solid var(--border-struct); }
  .footer__grid { grid-template-columns: 1fr 1fr; }
  .pair { grid-template-columns: 1fr; }
  .cta-inner { flex-direction: column; align-items: flex-start; }

  .h-display { font-size: clamp(2.4rem, 12vw, 3.4rem); word-break: break-word; }
  .h1 { font-size: clamp(2rem, 9vw, 2.8rem); }
  .h2 { font-size: 2rem; }

  /* min-width:0 so flex/grid children can shrink */
  .brand, .controls, .track-feature__body, .caption-block, .lineage__node, .hero__content { min-width: 0; }
  .rung { grid-template-columns: 44px 1fr; }
  .rung__chev { display: none; }
  .rung-detail { padding-left: calc(44px + var(--sp-5) + var(--sp-4)); }
}

@media (max-width: 860px) and (min-width: 561px) {
  .principles { grid-template-columns: 1fr 1fr; }
  .tracks { grid-template-columns: 1fr; }
  .lineage, .split, .photo-caption, .track-feature { grid-template-columns: 1fr; }
  .footer__grid { grid-template-columns: 1fr 1fr; }
}