:root {
  --bg: #0a0d14;
  --surface: #131824;
  --surface-raised: #1a2233;
  --surface-deep: #222d42;
  --surface-cyan: #152b38;
  --ink: #e9edf3;
  --muted: #9ba7b8;
  --accent: #5a9bfc;
  --accent-strong: #7db2ff;
  --accent-ink: #0a0d14;
  --paper-bg: #ffffff;
  --paper-tint: #f1f5f9;
  --paper-ink: #0f172a;
  --paper-muted: #475569;

  --radius: 8px;
  --gap: 8px;
  --pad: 24px;

  --fs-display: clamp(2.15rem, 4.7vw, 4.25rem);
  --fs-h2: clamp(1.85rem, 3.3vw, 3rem);
  --fs-lead: clamp(1.1875rem, 1.35vw, 1.4375rem);
  --fs-body: 1.0625rem;
  --fs-small: 0.875rem;

  --ease-out: cubic-bezier(0.22, 1, 0.36, 1);
  --ease-in-out: cubic-bezier(0.76, 0, 0.24, 1);
  --ease-soft: cubic-bezier(0.33, 1, 0.68, 1);
  --t-press: 140ms;
  --t-hover: 180ms;
  --t-ui: 240ms;
  --t-reveal: 760ms;

  color-scheme: dark;
  accent-color: var(--accent);
}

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

html {
  background-color: var(--bg);
  color: var(--ink);
  font-family: "Bricolage Grotesque", system-ui, -apple-system, sans-serif;
  font-size: 16px;
  line-height: 1.5;
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  padding: 12px;
  background-color: var(--bg);
  color: var(--ink);
  font-size: var(--fs-body);
  overflow-x: clip;
}

img {
  display: block;
  max-width: 100%;
  height: auto;
}

h1,
h2,
h3,
p,
ul,
ol,
figure,
pre {
  margin: 0;
}

h1,
h2,
h3 {
  font-weight: 600;
  letter-spacing: -0.04em;
  line-height: 0.96;
  color: var(--ink);
}

h1 {
  font-size: var(--fs-display);
}

h2 {
  font-size: var(--fs-h2);
}

h3 {
  font-size: var(--fs-lead);
  letter-spacing: -0.02em;
  line-height: 1.2;
}

p,
li {
  font-size: var(--fs-body);
  line-height: 1.5;
  max-width: 58ch;
}

a {
  color: var(--ink);
  text-decoration: underline;
  text-decoration-color: var(--muted);
  text-underline-offset: 0.22em;
  text-decoration-thickness: 0.08em;
  transition: color var(--t-hover) ease, text-decoration-color var(--t-hover) ease;
}

a:focus-visible,
button:focus-visible,
summary:focus-visible,
input:focus-visible,
select:focus-visible,
.table-wrapper:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

pre,
code,
kbd,
samp {
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: var(--fs-small);
}

.accent-word {
  color: var(--accent);
}

.tabular {
  font-variant-numeric: tabular-nums;
}

/* Buttons & interactive controls (>= 48x48px Fitts's Law targets) */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 48px;
  min-width: 48px;
  padding: 12px 20px;
  border: 0;
  border-radius: var(--radius);
  font-family: inherit;
  font-size: var(--fs-body);
  font-weight: 500;
  line-height: 1.2;
  text-decoration: none;
  cursor: pointer;
  touch-action: manipulation;
  user-select: none;
  transition: transform var(--t-press) var(--ease-out), background-color var(--t-hover) ease, color var(--t-hover) ease;
}

.btn:active {
  transform: scale(0.97);
}

.btn-primary {
  background-color: var(--accent);
  color: var(--accent-ink);
}

.btn-dark {
  background-color: var(--bg);
  color: var(--ink);
}

.btn-surface {
  background-color: var(--surface-deep);
  color: var(--ink);
}

@media (hover: hover) and (pointer: fine) {
  a:hover {
    color: var(--accent-strong);
    text-decoration-color: currentColor;
  }
  .btn-primary:hover {
    background-color: var(--accent-strong);
    color: var(--accent-ink);
  }
  .btn-dark:hover {
    background-color: var(--surface-raised);
    color: var(--ink);
  }
  .btn-surface:hover {
    background-color: var(--accent);
    color: var(--accent-ink);
  }
}

/* Component-specific light color-scheme for real PDF paper previews */
.paper-sheet {
  color-scheme: only light;
  background-color: var(--paper-bg);
  color: var(--paper-ink);
  accent-color: #1d4ed8;
}

/* ==========================================================================
   1. HERO BOARD ("The well-kept board" — 12-column dense tiles)
   ========================================================================== */
.board-grid {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  gap: var(--gap);
  margin-bottom: 56px;
}

.tile {
  background-color: var(--surface);
  border-radius: var(--radius);
  padding: var(--pad);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  overflow: hidden;
  position: relative;
}

.tile-brand {
  grid-column: 1 / 8;
  grid-row: 1 / 2;
  min-height: 250px;
  background-color: var(--surface);
}

.brand-bar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 24px;
}

.wordmark {
  font-size: var(--fs-lead);
  font-weight: 600;
  letter-spacing: -0.03em;
  color: var(--ink);
}

.nav-links {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
}

.nav-links a {
  display: inline-flex;
  align-items: center;
  min-height: 48px;
  padding: 0 4px;
  font-size: var(--fs-small);
}

.tile-statement {
  grid-column: 1 / 6;
  grid-row: 2 / 3;
  min-height: 250px;
  background-color: var(--surface-raised);
}

.statement-copy {
  font-size: var(--fs-lead);
  font-weight: 500;
  line-height: 1.35;
  color: var(--ink);
  max-width: 38ch;
}

.tile-links-row {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 20px;
}

.tile-links-row a {
  font-size: var(--fs-small);
  color: var(--muted);
}

.tile-action {
  grid-column: 6 / 8;
  grid-row: 2 / 3;
  min-height: 250px;
  background-color: var(--accent);
  color: var(--accent-ink);
}

.tile-action .action-figure {
  font-size: var(--fs-h2);
  font-weight: 600;
  letter-spacing: -0.04em;
  line-height: 1;
  color: var(--accent-ink);
}

.tile-action .action-note {
  font-size: var(--fs-body);
  color: var(--accent-ink);
  margin-top: 8px;
}

.tile-action .btn-dark {
  width: 100%;
  margin-top: 20px;
}

.tile-photo {
  padding: 0;
  background-color: var(--surface-raised);
}

.tile-hero-doc {
  grid-column: 8 / 11;
  grid-row: 1 / 3;
  min-height: 508px;
}

.tile-arch-top {
  grid-column: 11 / 13;
  grid-row: 1 / 2;
  min-height: 250px;
}

.tile-thermal-bot {
  grid-column: 11 / 13;
  grid-row: 2 / 3;
  min-height: 250px;
}

.frame-media {
  flex: 1;
  width: 100%;
  overflow: hidden;
  display: flex;
  align-items: flex-start;
  justify-content: center;
}

.frame-media.paper-sheet {
  padding: 12px 12px 0;
  background-color: var(--paper-tint);
}

.frame-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: top center;
}

.frame-media.paper-sheet img {
  object-fit: contain;
  object-position: top center;
}

.frame-strip {
  min-height: 34px;
  padding: 6px 14px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: var(--fs-small);
  font-weight: 500;
}

.strip-cornflower {
  background-color: var(--accent);
  color: var(--accent-ink);
}

.strip-slate {
  background-color: var(--surface-deep);
  color: var(--ink);
}

.strip-cyan {
  background-color: var(--surface-cyan);
  color: var(--ink);
}

/* ==========================================================================
   2. LIVE INTERACTIVE STUDIO ("One live thing" — real %PDF-1.4 in browser)
   ========================================================================== */
.section-block {
  margin-bottom: 72px;
}

.section-header {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 20px;
  padding: 0 4px;
}

.section-sub {
  color: var(--muted);
  max-width: 52ch;
}

.studio-grid {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  gap: var(--gap);
}

.studio-controls {
  grid-column: 1 / 6;
  background-color: var(--surface);
  border-radius: var(--radius);
  padding: var(--pad);
  display: flex;
  flex-direction: column;
  gap: 18px;
}

.preset-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 8px;
}

.preset-btn {
  min-height: 48px;
  padding: 10px 14px;
  border: 0;
  border-radius: var(--radius);
  background-color: var(--surface-raised);
  color: var(--ink);
  font-family: inherit;
  font-size: var(--fs-small);
  font-weight: 500;
  text-align: left;
  cursor: pointer;
  transition: transform var(--t-press) var(--ease-out), background-color var(--t-hover) ease, color var(--t-hover) ease;
}

.preset-btn:active {
  transform: scale(0.98);
}

.preset-btn[aria-pressed="true"] {
  background-color: var(--accent);
  color: var(--accent-ink);
}

.field-row {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
}

.field-group {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.field-group label {
  font-size: var(--fs-small);
  font-weight: 500;
  color: var(--muted);
}

.field-group input,
.field-group select {
  min-height: 48px;
  padding: 10px 12px;
  border-radius: var(--radius);
  border: 1px solid var(--surface-deep);
  background-color: var(--bg);
  color: var(--ink);
  font-family: inherit;
  font-size: var(--fs-body);
}

.studio-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 4px;
}

.studio-actions .btn {
  flex: 1 1 180px;
}

.studio-output {
  grid-column: 6 / 13;
  background-color: var(--surface);
  border-radius: var(--radius);
  padding: var(--pad);
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.telemetry-row {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 8px;
}

.telemetry-cell {
  background-color: var(--surface-raised);
  border-radius: var(--radius);
  padding: 12px 14px;
}

.telemetry-val {
  display: block;
  font-size: var(--fs-lead);
  font-weight: 600;
  color: var(--ink);
}

.telemetry-key {
  display: block;
  font-size: var(--fs-small);
  color: var(--muted);
  margin-top: 2px;
}

.live-paper {
  border-radius: var(--radius);
  overflow: hidden;
  padding: 0;
}

.live-paper-banner {
  padding: 18px 20px;
  background-color: #0d1f3c;
  color: #ffffff;
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 16px;
}

.live-paper-title {
  font-size: var(--fs-lead);
  font-weight: 600;
  color: #ffffff;
}

.live-paper-sub {
  font-size: var(--fs-small);
  color: #cbd5e1;
  margin-top: 4px;
}

.live-paper-badge {
  padding: 6px 10px;
  border-radius: var(--radius);
  background-color: #2563eb;
  color: #ffffff;
  font-size: var(--fs-small);
  font-weight: 600;
  white-space: nowrap;
}

.live-paper-body {
  padding: 18px 20px;
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 18px;
  align-items: center;
  background-color: var(--paper-bg);
  color: var(--paper-ink);
}

.live-paper-lines {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.live-line-primary {
  font-size: var(--fs-body);
  font-weight: 600;
  color: var(--paper-ink);
}

.live-line-rtl {
  font-size: var(--fs-body);
  color: var(--paper-ink);
}

.live-line-total {
  font-size: var(--fs-lead);
  font-weight: 600;
  color: #0f172a;
  margin-top: 4px;
}

.live-qr-box {
  width: 96px;
  height: 96px;
  padding: 6px;
  background-color: #ffffff;
  border-radius: var(--radius);
  display: flex;
  align-items: center;
  justify-content: center;
}

.live-qr-box svg {
  width: 100%;
  height: 100%;
  display: block;
}

.xref-console {
  background-color: var(--bg);
  border-radius: var(--radius);
  padding: 14px 16px;
  overflow-x: auto;
  color: var(--ink);
  max-height: 168px;
}

/* ==========================================================================
   3. SHOWCASE: ROWS AS A BOARD (Station Departure Board, data-ui)
   ========================================================================== */
.departure-board {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.board-row {
  width: 100%;
  min-height: 72px;
  padding: 16px 20px;
  border: 0;
  border-radius: var(--radius);
  background-color: var(--surface);
  color: var(--ink);
  font-family: inherit;
  text-align: left;
  cursor: pointer;
  display: grid;
  grid-template-columns: 5fr 3fr 2fr auto;
  align-items: center;
  gap: 16px;
  transition: background-color var(--t-ui) ease, color var(--t-ui) ease, transform var(--t-press) var(--ease-out);
}

.board-row:active {
  transform: scale(0.995);
}

.board-row-name {
  font-size: var(--fs-lead);
  font-weight: 500;
}

.board-row-fact {
  font-size: var(--fs-body);
  color: var(--muted);
}

.board-row-status {
  padding: 6px 12px;
  border-radius: var(--radius);
  background-color: var(--surface-deep);
  color: var(--ink);
  font-size: var(--fs-small);
  font-weight: 500;
  justify-self: end;
}

.board-row-detail {
  display: none;
  grid-column: 1 / -1;
  font-size: var(--fs-body);
  line-height: 1.45;
  max-width: 68ch;
  padding-top: 10px;
}

.board-row.is-open {
  min-height: 176px;
  align-content: space-between;
  background-color: var(--accent);
  color: var(--accent-ink);
}

.board-row.is-open .board-row-fact {
  color: var(--accent-ink);
}

.board-row.is-open .board-row-status {
  background-color: var(--bg);
  color: var(--ink);
}

.board-row.is-open .board-row-detail {
  display: block;
  color: var(--accent-ink);
}

/* ==========================================================================
   4. STATS: BARS STANDING ON THE EDGE + RESPONSIVE TABLE
   ========================================================================== */
.stats-field {
  background-color: var(--surface);
  border-radius: var(--radius);
  padding: 28px 24px 0;
  min-height: 520px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  overflow: hidden;
  margin-bottom: var(--gap);
}

.stats-callout {
  max-width: 44ch;
}

.stats-giant {
  font-size: clamp(3.5rem, 8.2vw, 7.25rem);
  font-weight: 600;
  letter-spacing: -0.04em;
  line-height: 0.92;
  color: var(--ink);
}

.stats-claim {
  font-size: var(--fs-lead);
  color: var(--muted);
  margin-top: 10px;
}

.edge-bars {
  display: grid;
  grid-template-columns: repeat(10, minmax(0, 1fr));
  gap: 8px;
  align-items: end;
  min-height: 320px;
  padding-top: 32px;
}

.bar-col {
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  gap: 8px;
  height: 100%;
}

.bar-readout {
  font-size: var(--fs-small);
  font-weight: 500;
  color: var(--ink);
}

.bar-name {
  font-size: var(--fs-small);
  color: var(--muted);
}

.bar-pillar {
  width: 100%;
  height: var(--bar-h, 80px);
  background-color: var(--surface-deep);
  border-radius: var(--radius) var(--radius) 0 0;
  transform-origin: bottom center;
}

.bar-col.is-hero .bar-pillar {
  background-color: var(--accent);
}

.bar-col.is-second .bar-pillar {
  background-color: var(--surface-cyan);
}

/* Responsive comparison table (modern-web-guidance: responsive-table) */
.table-wrapper {
  overflow: auto;
  max-inline-size: 100%;
  max-block-size: min(520px, 80svh);
  container-type: inline-size;
  background-color: var(--surface);
  border-radius: var(--radius);
}

.bench-table {
  width: 100%;
  border-collapse: separate;
  border-spacing: 0;
  --label-2: "P50 latency";
  --label-3: "Cold RAM";
  --label-4: "Runtime deps";
  --label-5: "Arabic + Cyrillic";
  --label-6: "SSRF surface";
}

.bench-table caption {
  text-align: left;
  padding: 18px 20px 12px;
  font-size: var(--fs-lead);
  font-weight: 600;
  color: var(--ink);
}

.bench-table thead {
  position: sticky;
  inset-block-start: 0;
  z-index: 2;
}

.bench-table th,
.bench-table td {
  padding: 14px 20px;
  text-align: left;
  font-size: var(--fs-body);
  border-bottom: 1px solid var(--surface-deep);
}

.bench-table thead th {
  background-color: var(--surface-raised);
  color: var(--muted);
  font-size: var(--fs-small);
  font-weight: 500;
}

.bench-table tbody th {
  position: sticky;
  inset-inline-start: 0;
  z-index: 1;
  background-color: var(--surface);
  color: var(--ink);
  font-weight: 600;
}

.bench-table tbody tr.row-accent th,
.bench-table tbody tr.row-accent td {
  background-color: var(--surface-raised);
}

@container (width < 640px) {
  .bench-table,
  .bench-table caption,
  .bench-table thead,
  .bench-table tbody,
  .bench-table tr,
  .bench-table th,
  .bench-table td {
    display: block;
    width: 100%;
  }

  .bench-table thead {
    display: none;
  }

  .bench-table tbody tr {
    margin: 12px;
    border: 1px solid var(--surface-deep);
    border-radius: var(--radius);
    overflow: hidden;
  }

  .bench-table tbody th {
    position: sticky;
    inset-block-start: 0;
    z-index: 2;
    background-color: var(--surface-raised);
  }

  .bench-table td:nth-child(2)::before {
    content: var(--label-2) ": ";
    color: var(--muted);
  }
  .bench-table td:nth-child(3)::before {
    content: var(--label-3) ": ";
    color: var(--muted);
  }
  .bench-table td:nth-child(4)::before {
    content: var(--label-4) ": ";
    color: var(--muted);
  }
  .bench-table td:nth-child(5)::before {
    content: var(--label-5) ": ";
    color: var(--muted);
  }
  .bench-table td:nth-child(6)::before {
    content: var(--label-6) ": ";
    color: var(--muted);
  }
}

/* ==========================================================================
   5. HOW IT WORKS: STAGES AS ONE BAR
   ========================================================================== */
.stages-bar {
  display: flex;
  gap: 6px;
  width: 100%;
  min-height: 184px;
}

.stage-seg {
  border-radius: var(--radius);
  padding: 20px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  min-width: 14%;
}

.stage-1 {
  flex: 14 1 0%;
  background-color: var(--surface);
}

.stage-2 {
  flex: 26 1 0%;
  background-color: var(--surface-raised);
}

.stage-3 {
  flex: 36 1 0%;
  background-color: var(--accent);
  color: var(--accent-ink);
}

.stage-4 {
  flex: 24 1 0%;
  background-color: var(--surface-cyan);
}

.stage-time {
  font-size: var(--fs-lead);
  font-weight: 600;
}

.stage-desc {
  font-size: var(--fs-body);
  color: var(--muted);
  max-width: 26ch;
  margin-top: 16px;
}

.stage-3 .stage-desc {
  color: var(--accent-ink);
}

/* ==========================================================================
   6. FEATURES: CLOSE-UPS ON A BOARD + REAL SPECIMEN TILES
   ========================================================================== */
.macro-board {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  gap: var(--gap);
}

.macro-tile {
  border-radius: var(--radius);
  background-color: var(--surface);
  padding: var(--pad);
  overflow: hidden;
  position: relative;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  min-height: 230px;
}

.span-6 {
  grid-column: span 6;
}

.span-4 {
  grid-column: span 4;
}

.span-3 {
  grid-column: span 3;
}

.macro-specimen {
  font-size: clamp(2.4rem, 4.4vw, 4rem);
  font-weight: 600;
  letter-spacing: -0.03em;
  line-height: 1.05;
  color: var(--accent);
  margin-bottom: 18px;
}

.macro-tile.fill-cyan {
  background-color: var(--surface-cyan);
}

.macro-tile.fill-raised {
  background-color: var(--surface-raised);
}

.macro-tile.fill-accent {
  background-color: var(--accent);
  color: var(--accent-ink);
}

.macro-tile.fill-accent h3,
.macro-tile.fill-accent p,
.macro-tile.fill-accent .macro-specimen {
  color: var(--accent-ink);
}

.macro-caption p {
  color: var(--muted);
  margin-top: 6px;
}

.macro-photo-tile {
  padding: 0;
  min-height: 320px;
}

/* ==========================================================================
   7. FAQ: ACCORDION OF FILLED TILES
   ========================================================================== */
.faq-layout {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  gap: var(--gap);
  align-items: start;
}

.faq-lead {
  grid-column: 1 / 5;
  position: sticky;
  top: 32px;
  padding: 8px 4px;
}

.faq-lead p {
  color: var(--muted);
  margin-top: 12px;
}

.faq-stack {
  grid-column: 5 / 13;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.faq-item {
  background-color: var(--surface);
  border-radius: var(--radius);
  overflow: hidden;
  transition: background-color var(--t-ui) ease, color var(--t-ui) ease;
}

.faq-item summary {
  list-style: none;
  min-height: 72px;
  padding: 20px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  font-size: var(--fs-lead);
  font-weight: 500;
  cursor: pointer;
}

.faq-item summary::-webkit-details-marker {
  display: none;
}

.faq-plus {
  position: relative;
  width: 16px;
  height: 16px;
  flex: 0 0 16px;
}

.faq-plus::before,
.faq-plus::after {
  content: "";
  position: absolute;
  background-color: currentColor;
  transition: transform var(--t-ui) var(--ease-out);
}

.faq-plus::before {
  top: 6.5px;
  left: 0;
  width: 16px;
  height: 3px;
}

.faq-plus::after {
  top: 0;
  left: 6.5px;
  width: 3px;
  height: 16px;
}

.faq-answer {
  padding: 0 24px 24px;
  max-width: 56ch;
}

.faq-item[open] {
  background-color: var(--accent);
  color: var(--accent-ink);
}

.faq-item[open] .faq-plus::after {
  transform: rotate(90deg);
}

.faq-item[open] a {
  color: var(--accent-ink);
  text-decoration-color: var(--accent-ink);
}

/* ==========================================================================
   8. FOOTER: THE MARK, BUILT LARGE
   ========================================================================== */
.footer-band {
  background-color: var(--surface);
  border-radius: var(--radius);
  padding: 28px 24px 24px;
}

.mark-blocks {
  display: grid;
  grid-template-columns: repeat(6, minmax(0, 1fr));
  gap: 4px;
  align-items: end;
  min-height: 190px;
  margin-bottom: 44px;
}

.mark-cell {
  border-radius: var(--radius);
  padding: 16px 18px;
  display: flex;
  align-items: flex-end;
  justify-content: flex-start;
  font-size: clamp(2.5rem, 6vw, 5.2rem);
  font-weight: 600;
  line-height: 0.88;
  letter-spacing: -0.04em;
}

.mark-1 { height: 74%; background-color: var(--surface-raised); color: var(--ink); }
.mark-2 { height: 88%; background-color: var(--surface-deep); color: var(--ink); }
.mark-3 { height: 66%; background-color: var(--surface-cyan); color: var(--ink); }
.mark-4 { height: 100%; background-color: var(--accent); color: var(--accent-ink); }
.mark-5 { height: 84%; background-color: var(--surface-raised); color: var(--ink); }
.mark-6 { height: 94%; background-color: var(--surface-deep); color: var(--ink); }

.footer-grid {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  gap: 16px;
  margin-bottom: 28px;
}

.footer-col {
  grid-column: span 3;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.footer-col-title {
  font-size: var(--fs-body);
  font-weight: 600;
  color: var(--ink);
  margin-bottom: 4px;
}

.footer-col a {
  display: inline-flex;
  align-items: center;
  min-height: 40px;
  font-size: var(--fs-small);
  color: var(--muted);
}

.footer-foot {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.footer-copy {
  font-size: var(--fs-small);
  color: var(--muted);
}

/* ==========================================================================
   9. MOTION CHOREOGRAPHY (Signature Shutter + Section Entrances)
   ========================================================================== */
.shutter {
  overflow: hidden;
}

@media (prefers-reduced-motion: no-preference) {
  .js [data-rise] {
    opacity: 0;
    transform: translateY(18px);
    animation: rise var(--t-reveal) var(--ease-out) forwards;
    animation-delay: calc(var(--i, 0) * 80ms + 90ms);
  }

  .js .shutter {
    clip-path: inset(0 0 100% 0);
    transition: clip-path 1100ms var(--ease-in-out);
  }

  .js .shutter img {
    transform: scale(1.12);
    transition: transform 1450ms var(--ease-soft);
  }

  .js .shutter.is-in {
    clip-path: inset(0);
  }

  .js .shutter.is-in img {
    transform: none;
  }

  .js [data-reveal] {
    opacity: 0;
    transform: translateY(22px);
    transition: opacity 680ms var(--ease-out), transform 820ms var(--ease-out);
    transition-delay: calc(var(--d, 0) * 65ms);
  }

  .js [data-reveal].is-in {
    opacity: 1;
    transform: none;
  }

  .js [data-bar] {
    transform: scaleY(0.08);
    opacity: 0.35;
    transition: transform 860ms var(--ease-out), opacity 520ms var(--ease-out);
    transition-delay: calc(var(--d, 0) * 55ms);
  }

  .js [data-bar].is-in {
    transform: scaleY(1);
    opacity: 1;
  }
}

@keyframes rise {
  to {
    opacity: 1;
    transform: none;
  }
}

/* ==========================================================================
   10. RESPONSIVE BREAKPOINTS (Tablet 768px & Phone 390px)
   ========================================================================== */
@media (max-width: 1024px) {
  .tile-brand {
    grid-column: 1 / 13;
    grid-row: auto;
    min-height: auto;
  }
  .tile-statement {
    grid-column: 1 / 8;
    grid-row: auto;
    min-height: auto;
  }
  .tile-action {
    grid-column: 8 / 13;
    grid-row: auto;
    min-height: auto;
  }
  .tile-hero-doc {
    grid-column: 1 / 8;
    grid-row: auto;
    min-height: 420px;
  }
  .tile-arch-top {
    grid-column: 8 / 13;
    grid-row: auto;
    min-height: 206px;
  }
  .tile-thermal-bot {
    grid-column: 8 / 13;
    grid-row: auto;
    min-height: 206px;
  }
  .studio-controls,
  .studio-output {
    grid-column: 1 / 13;
  }
  .macro-tile.span-3,
  .macro-tile.span-4 {
    grid-column: span 6;
  }
  .faq-lead {
    grid-column: 1 / 13;
    position: static;
  }
  .faq-stack {
    grid-column: 1 / 13;
  }
  .footer-col {
    grid-column: span 6;
  }
}

@media (max-width: 680px) {
  body {
    padding: 8px;
  }
  .tile {
    padding: 18px;
  }
  .tile-statement,
  .tile-action {
    grid-column: 1 / 13;
  }
  .tile-hero-doc {
    grid-column: 1 / 13;
    min-height: 360px;
  }
  .tile-arch-top,
  .tile-thermal-bot {
    grid-column: span 6;
    min-height: 180px;
  }
  .preset-grid,
  .field-row {
    grid-template-columns: 1fr;
  }
  .telemetry-row {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .live-paper-body {
    grid-template-columns: 1fr;
  }
  .board-row {
    grid-template-columns: 1fr auto;
    min-height: 64px;
    padding: 14px 16px;
  }
  .board-row-fact {
    display: none;
  }
  .edge-bars {
    grid-template-columns: 1fr;
    gap: 8px;
    min-height: auto;
  }
  .bar-col {
    display: grid;
    grid-template-columns: 118px 1fr auto;
    align-items: center;
    gap: 10px;
  }
  .bar-pillar {
    height: 28px;
    width: var(--bar-m, 40%);
    border-radius: var(--radius);
    transform-origin: left center;
  }
  .stages-bar {
    flex-direction: column;
    min-height: auto;
  }
  .macro-tile.span-6,
  .macro-tile.span-4,
  .macro-tile.span-3 {
    grid-column: 1 / 13;
  }
  .mark-blocks {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    min-height: 150px;
  }
  .mark-cell {
    min-height: 76px;
  }
}