/* Hallmark · genre: editorial · macrostructure: Map / Diagram · theme: Studio · enrichment: E5 tier-B hand SVG · nav: N6 · footer: Ft1 */
/* Hallmark · contrast: pass (40–41) · slop: pass (42–45) · honest: pass (46) · chrome: pass (47) · tokens: pass (48) · responsive: pass (49) · icons: pass (30) · mobile: pass (34, 49, 50–57) */
/* Hallmark · pre-emit critique: P5 H4 E4 S5 R5 V5 */
@import url("tokens.css");

html,
body {
  overflow-x: clip;
}

html {
  color-scheme: light;
  scroll-behavior: smooth;
}

html[data-theme="dark"] {
  color-scheme: dark;
}

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

::selection {
  color: var(--color-ink);
  background: var(--color-selection);
}

body {
  margin: 0;
  min-width: 0;
  min-height: 100dvh;
  color: var(--color-ink-2);
  background: var(--color-paper);
  font-family: var(--font-body);
  font-size: var(--text-base);
  line-height: 1.68;
  text-rendering: optimizeLegibility;
}

button {
  font: inherit;
}

a {
  color: var(--color-ink);
  text-decoration-color: var(--color-rule-strong);
  text-decoration-thickness: var(--rule-hair);
  text-underline-offset: 0.23em;
}

a:hover {
  text-decoration-color: var(--color-accent);
}

a:focus-visible,
button:focus-visible {
  outline: var(--rule-strong) solid var(--color-focus);
  outline-offset: var(--space-2xs);
}

button:focus-visible {
  transition: none;
}

.skip-link {
  position: fixed;
  inset-block-start: var(--space-sm);
  inset-inline-start: var(--space-sm);
  z-index: var(--z-toast);
  padding: var(--space-sm) var(--space-md);
  color: var(--color-accent-ink);
  background: var(--color-accent);
  transform: translateY(-180%);
  transition: transform var(--dur-short) var(--ease-out);
  white-space: nowrap;
}

.skip-link:focus {
  transform: translateY(0);
}

.reading-progress {
  position: fixed;
  inset-block-start: 0;
  inset-inline: 0;
  z-index: var(--z-sticky);
  height: var(--space-2xs);
  background: var(--color-paper-3);
}

.reading-progress__fill {
  width: 100%;
  height: 100%;
  background: var(--color-accent);
  transform: scaleX(0);
  transform-origin: left center;
}

.nav-mast {
  display: grid;
  gap: var(--space-2xs);
  width: min(100%, var(--page-max));
  margin-inline: auto;
  padding: var(--space-md) var(--page-gutter) 0;
  text-align: center;
}

.mast-line {
  margin: 0;
  color: var(--color-muted);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.08em;
}

.mast-name {
  margin: 0;
  color: var(--color-ink);
  font-family: var(--font-display);
  font-size: clamp(2rem, 5vw, 3.7rem);
  font-style: normal;
  font-weight: 800;
  letter-spacing: -0.035em;
  line-height: 1.05;
  overflow-wrap: anywhere;
  min-width: 0;
}

.mast-actions {
  display: flex;
  justify-content: center;
  gap: var(--space-xs);
  margin-block-start: var(--space-xs);
}

.mast-nav {
  display: none;
}

.mast-nav[hidden] {
  display: none;
}

.mast-nav ul {
  display: grid;
  gap: 0;
  margin: var(--space-sm) 0 0;
  padding: 0;
  list-style: none;
  border-top: var(--rule-hair) solid var(--color-rule);
}

.mast-nav a {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: var(--space-sm);
  min-height: 2.75rem;
  padding-block: var(--space-sm);
  border-bottom: var(--rule-hair) solid var(--color-rule);
  text-decoration: none;
  white-space: nowrap;
}

.mast-nav a[aria-current="page"] {
  color: var(--color-accent);
}

.mast-nav small {
  color: var(--color-muted);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
}

.mast-nav.is-open {
  display: block;
}

.mast-rule {
  height: var(--space-2xs);
  margin: var(--space-sm) 0 0;
  border: 0;
  border-top: var(--rule-hair) solid var(--color-rule-strong);
  border-bottom: var(--rule-hair) solid var(--color-rule-strong);
}

.control,
.route-button {
  min-height: 2.75rem;
  padding-inline: var(--space-md);
  color: var(--color-ink);
  background: var(--color-panel);
  border: var(--rule-hair) solid var(--color-rule-strong);
  border-radius: var(--radius-control);
  cursor: pointer;
  font-weight: 700;
  line-height: 1;
  white-space: nowrap;
  transition: background-color var(--dur-short) var(--ease-out), color var(--dur-short) var(--ease-out), transform var(--dur-micro) var(--ease-out);
}

.control:active,
.route-button:active,
.control[data-state="active"],
.route-button[aria-pressed="true"] {
  transform: translateY(1px);
}

.control[disabled],
.route-button[disabled],
.control[aria-disabled="true"],
.route-button[aria-disabled="true"] {
  cursor: not-allowed;
  opacity: 0.55;
}

.control[data-state="loading"],
.route-button[data-state="loading"] {
  cursor: progress;
}

.control[data-state="error"],
.route-button[data-state="error"] {
  color: var(--color-error);
  background: var(--color-error-soft);
  border-color: var(--color-error);
}

.control[data-state="success"],
.route-button[data-state="success"] {
  color: var(--color-success);
  background: var(--color-success-soft);
  border-color: var(--color-success);
}

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

.breadcrumb {
  display: flex;
  gap: var(--space-xs);
  align-items: center;
  width: min(100%, var(--page-max));
  margin-inline: auto;
  padding: var(--space-md) var(--page-gutter);
  color: var(--color-muted);
  font-size: var(--text-sm);
  overflow-x: auto;
}

.breadcrumb a,
.breadcrumb span {
  white-space: nowrap;
}

.page-shell {
  width: min(100%, var(--page-max));
  margin-inline: auto;
  padding: 0 var(--page-gutter) var(--space-3xl);
}

.hero-map,
.chapter-head {
  display: grid;
  gap: var(--space-xl);
  padding-block: var(--space-2xl) var(--space-3xl);
  border-bottom: var(--rule-hair) solid var(--color-rule);
}

.hero-copy,
.chapter-copy {
  min-width: 0;
}

.orientation-line {
  margin: 0 0 var(--space-sm);
  color: var(--color-accent);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  font-weight: 700;
  letter-spacing: 0.08em;
}

h1,
h2,
h3 {
  color: var(--color-ink);
  font-family: var(--font-display);
  font-style: normal;
  overflow-wrap: anywhere;
  min-width: 0;
}

h1 {
  max-width: 12ch;
  margin: 0;
  font-size: var(--text-display-s);
  font-weight: 800;
  letter-spacing: -0.045em;
  line-height: 1.05;
}

h2 {
  margin: 0;
  font-size: var(--text-2xl);
  font-weight: 800;
  letter-spacing: -0.025em;
  line-height: 1.18;
}

h3 {
  margin: 0;
  font-size: var(--text-lg);
  font-weight: 800;
  line-height: 1.3;
}

.lede {
  max-width: 48ch;
  margin: var(--space-lg) 0 0;
  color: var(--color-ink-2);
  font-size: var(--text-md);
  line-height: 1.7;
}

.hero-note {
  max-width: 62ch;
  margin: var(--space-md) 0 0;
  color: var(--color-muted);
}

.chip-map {
  margin: 0;
  padding: var(--space-md);
  color: var(--color-ink);
  background: var(--color-paper-2);
  border-top: var(--rule-strong) solid var(--color-ink);
  border-bottom: var(--rule-hair) solid var(--color-rule-strong);
}

.chip-map svg {
  display: block;
  width: 100%;
  height: auto;
  max-height: 30rem;
}

.chip-map .die,
.chip-map .node,
.chip-map .memory {
  fill: var(--color-panel);
  stroke: currentColor;
  stroke-width: 1.4;
}

.chip-map .gpu-node {
  color: var(--color-gpu);
}

.chip-map .tpu-node {
  color: var(--color-tpu);
}

.chip-map .npu-node {
  color: var(--color-npu);
}

.chip-map .path {
  fill: none;
  stroke: var(--color-rule-strong);
  stroke-width: 1.4;
  stroke-dasharray: 7 6;
}

.chip-map .path-accent {
  stroke: var(--color-accent);
}

.chip-map .map-title,
.chip-map .map-label {
  fill: var(--color-ink);
  font-family: var(--font-display);
  font-weight: 800;
}

.chip-map .map-title {
  font-size: 18px;
}

.chip-map .map-label {
  font-size: 15px;
}

.chip-map .map-small {
  fill: var(--color-muted);
  font-family: var(--font-mono);
  font-size: 9px;
}

.chip-map figcaption {
  max-width: 64ch;
  margin-block-start: var(--space-sm);
  color: var(--color-muted);
  font-size: var(--text-sm);
}

.article-flow {
  display: grid;
  gap: var(--space-3xl);
  padding-block-start: var(--space-3xl);
}

.prose-section {
  display: grid;
  gap: var(--space-lg);
}

.prose-section__head {
  display: grid;
  gap: var(--space-sm);
  max-width: 52rem;
}

.prose-section__head p {
  margin: 0;
  color: var(--color-muted);
}

.prose {
  max-width: var(--prose-max);
}

.prose p {
  margin: 0 0 var(--space-md);
}

.prose p:last-child {
  margin-block-end: 0;
}

.prose dfn {
  color: var(--color-ink);
  font-style: normal;
  font-weight: 800;
  text-decoration: underline;
  text-decoration-color: var(--color-accent);
  text-decoration-thickness: var(--rule-strong);
  text-underline-offset: 0.2em;
}

.source-ref {
  font-family: var(--font-mono);
  font-size: 0.75em;
  vertical-align: super;
}

.compare-sheet {
  width: 100%;
  border-collapse: collapse;
  font-size: var(--text-sm);
}

.compare-sheet caption {
  padding-block-end: var(--space-sm);
  color: var(--color-muted);
  text-align: start;
}

.compare-sheet th,
.compare-sheet td {
  padding: var(--space-sm) var(--space-xs);
  border-bottom: var(--rule-hair) solid var(--color-rule);
  text-align: start;
  vertical-align: top;
}

.compare-sheet th {
  color: var(--color-ink);
  font-family: var(--font-display);
  font-weight: 800;
}

.compare-sheet tbody th {
  width: 8.5rem;
}

.table-wrap {
  border-top: var(--rule-strong) solid var(--color-ink);
  border-bottom: var(--rule-hair) solid var(--color-rule-strong);
}

.route-lab {
  display: grid;
  gap: var(--space-lg);
  padding: var(--space-xl) 0;
  border-block: var(--rule-hair) solid var(--color-rule-strong);
}

.route-controls {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-xs);
}

.route-output {
  display: grid;
  gap: var(--space-md);
}

.route-result {
  margin: 0;
  color: var(--color-ink);
  font-family: var(--font-display);
  font-size: var(--text-xl);
  font-weight: 800;
  line-height: 1.25;
}

.route-reason {
  max-width: 64ch;
  margin: 0;
}

.signal-list {
  display: grid;
  gap: var(--space-sm);
  margin: 0;
  padding: 0;
  list-style: none;
}

.signal-list li {
  display: grid;
  grid-template-columns: minmax(5.5rem, 0.35fr) minmax(0, 1fr);
  gap: var(--space-sm);
  padding-block-end: var(--space-sm);
  border-bottom: var(--rule-hair) solid var(--color-rule);
}

.signal-list strong {
  color: var(--color-ink);
}

.chapter-nav {
  display: grid;
  gap: var(--space-sm);
  margin-block-start: var(--space-3xl);
  padding-block-start: var(--space-lg);
  border-top: var(--rule-strong) solid var(--color-ink);
}

.chapter-nav a {
  display: block;
  min-height: 2.75rem;
  padding-block: var(--space-sm);
  color: var(--color-ink);
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-weight: 800;
  text-decoration: none;
  white-space: nowrap;
}

.chapter-nav small {
  display: block;
  margin-block-end: var(--space-2xs);
  color: var(--color-muted);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  font-weight: 400;
}

.source-list {
  display: grid;
  gap: var(--space-xl);
  margin: 0;
  padding: 0;
  list-style: none;
}

.source-entry {
  display: grid;
  gap: var(--space-sm);
  padding-block-end: var(--space-xl);
  border-bottom: var(--rule-hair) solid var(--color-rule);
}

.source-entry h2 {
  font-size: var(--text-xl);
}

.source-entry p {
  max-width: var(--prose-max);
  margin: 0;
}

.source-entry a,
.text-link {
  width: fit-content;
  min-height: 2.75rem;
  display: inline-flex;
  align-items: center;
  color: var(--color-accent);
  font-weight: 800;
  text-decoration: underline;
  white-space: nowrap;
}

.foot-mast {
  display: grid;
  gap: var(--space-lg);
  width: min(100%, var(--page-max));
  margin-inline: auto;
  padding: var(--space-xl) var(--page-gutter) var(--space-2xl);
  color: var(--color-muted);
  border-top: var(--rule-strong) solid var(--color-ink);
}

.foot-mast p {
  margin: 0;
}

.foot-wordmark {
  color: var(--color-ink);
  font-family: var(--font-display);
  font-size: var(--text-xl);
  font-weight: 800;
}

.foot-links {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-md);
}

.foot-links a {
  min-height: 2.75rem;
  display: inline-flex;
  align-items: center;
  white-space: nowrap;
}

@media (hover: hover) and (pointer: fine) {
  .control:hover,
  .route-button:hover {
    color: var(--color-accent);
    background: var(--color-paper-2);
  }

  .mast-nav a:hover,
  .chapter-nav a:hover,
  .source-entry a:hover,
  .text-link:hover {
    color: var(--color-accent);
  }
}

@media (min-width: 40rem) {
  .mast-actions {
    justify-content: flex-end;
  }

  .mast-nav {
    display: block;
  }

  .mast-nav[hidden] {
    display: block;
  }

  .mast-nav ul {
    display: inline-flex;
    gap: var(--space-lg);
    margin-block-start: var(--space-xs);
    border-top: 0;
  }

  .mast-nav a {
    min-height: 2.75rem;
    padding-block: var(--space-xs);
    border-bottom: 0;
  }

  .mast-nav small {
    display: none;
  }

  [data-nav-toggle] {
    display: none;
  }

  .hero-map,
  .chapter-head {
    grid-template-columns: minmax(0, 0.82fr) minmax(0, 1.18fr);
    align-items: end;
  }

  .chapter-head {
    grid-template-columns: minmax(0, 1fr) minmax(15rem, 0.42fr);
  }

  .chapter-nav {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .chapter-nav a:last-child {
    text-align: end;
  }

  .foot-mast {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: end;
  }
}

@media (min-width: 60rem) {
  .prose-section {
    grid-template-columns: minmax(12rem, 0.42fr) minmax(0, 1fr);
    column-gap: var(--space-2xl);
  }

  .prose-section__head {
    position: sticky;
    top: var(--space-lg);
    align-self: start;
  }

  .route-lab {
    grid-template-columns: minmax(15rem, 0.45fr) minmax(0, 1fr);
  }

  .foot-mast {
    padding-block-end: var(--space-3xl);
  }
}

@media (max-width: 39.99rem) {
  .compare-sheet,
  .compare-sheet tbody,
  .compare-sheet tr,
  .compare-sheet th,
  .compare-sheet td {
    display: block;
  }

  .compare-sheet thead {
    position: absolute;
    width: 1px;
    height: 1px;
    overflow: hidden;
    clip-path: inset(50%);
  }

  .compare-sheet tr {
    padding-block: var(--space-sm);
    border-bottom: var(--rule-hair) solid var(--color-rule-strong);
  }

  .compare-sheet th,
  .compare-sheet td {
    width: auto;
    padding: var(--space-xs) 0;
    border-bottom: 0;
  }

  .compare-sheet td::before {
    content: attr(data-label) " · ";
    color: var(--color-muted);
    font-family: var(--font-mono);
    font-size: var(--text-xs);
    font-weight: 700;
  }

  .signal-list li {
    grid-template-columns: minmax(0, 1fr);
  }

  .chapter-nav a {
    font-size: var(--text-md);
    overflow: hidden;
    text-overflow: ellipsis;
  }
}

@media (pointer: coarse) {
  .control,
  .route-button,
  .mast-nav a,
  .chapter-nav a,
  .source-entry a,
  .text-link,
  .foot-links a {
    min-height: 2.75rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    animation-duration: 150ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 150ms !important;
  }
}

@media print {
  .reading-progress,
  .mast-actions,
  .mast-nav,
  .breadcrumb {
    display: none;
  }

  body {
    color: var(--color-ink);
    background: var(--color-paper);
  }

  .page-shell {
    width: 100%;
  }

  a {
    text-decoration: underline;
  }
}