:root {
  --simd-cobalt: oklch(52% 0.18 265);
  --simd-orange: oklch(70% 0.17 55);
  --simd-lime: oklch(78% 0.16 125);
  --simd-graphite: oklch(22% 0.035 250);
  --simd-cream: oklch(96% 0.025 85);
}

:root[data-theme="dark"] {
  --simd-cobalt: oklch(72% 0.14 265);
  --simd-orange: oklch(78% 0.14 55);
  --simd-lime: oklch(82% 0.14 125);
}

.simd-hero {
  display: grid;
  grid-template-columns: minmax(0, 0.82fr) minmax(35rem, 1.18fr);
  align-items: center;
  min-height: 44rem;
  padding-block: 5rem;
  gap: clamp(3rem, 7vw, 7rem);
}

.simd-hero h1 {
  max-width: 11ch;
  font-size: clamp(4rem, 7.5vw, 7rem);
  letter-spacing: -0.055em;
}

.hero-lede {
  max-width: 38rem;
  color: var(--ink-soft);
  font-size: 1.1rem;
}

.actions {
  display: flex;
  flex-wrap: wrap;
  margin-top: 2rem;
  gap: 0.8rem;
}

.experimental-note {
  margin-top: 1rem;
  color: var(--ink-soft);
  font-size: 0.78rem;
}

.lane-machine {
  min-width: 0;
  margin: 0;
  padding: clamp(1.3rem, 3vw, 2.2rem);
  border: 1px solid color-mix(in oklch, var(--simd-cobalt) 28%, var(--line));
  background: var(--surface);
  box-shadow: 0.85rem 0.85rem 0 var(--line);
}

.lane-machine figcaption {
  display: flex;
  justify-content: space-between;
  margin-bottom: 1.3rem;
  color: var(--ink-soft);
  font-size: 0.72rem;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.lane-machine figcaption strong {
  color: var(--ink);
}

.lane-index,
.lane-row {
  display: grid;
  grid-template-columns: repeat(16, minmax(0, 1fr));
}

.lane-index span {
  padding-bottom: 0.35rem;
  color: var(--ink-soft);
  font-family: var(--font-mono);
  font-size: clamp(0.45rem, 0.8vw, 0.66rem);
  text-align: center;
}

.lane-row {
  border: 2px solid var(--simd-graphite);
}

.lane-row span {
  min-width: 0;
  padding-block: clamp(0.75rem, 2.3vw, 1.35rem);
  border-right: 1px solid color-mix(in oklch, white 34%, transparent);
  background: var(--simd-cobalt);
  color: white;
  font-family: var(--font-mono);
  font-size: clamp(0.58rem, 1.15vw, 0.86rem);
  text-align: center;
}

.lane-row span:last-child {
  border: 0;
}

.lane-row .lane-zero {
  background: var(--simd-orange);
  color: var(--simd-graphite);
  font-weight: 700;
}

.mask-rule {
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  margin-top: 1.5rem;
  gap: 1rem;
  color: var(--ink-soft);
  font-size: 0.72rem;
}

.mask-rule > div {
  display: grid;
  grid-template-columns: repeat(16, 1fr);
  gap: 0.2rem;
}

.mask-rule i {
  display: block;
  height: 0.45rem;
  background: var(--line);
}

.mask-rule i.true {
  background: var(--simd-orange);
}

.mask-rule code {
  white-space: nowrap;
}

.mechanism-tag {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: 2rem;
  padding-top: 1rem;
  border-top: 1px solid var(--line);
  color: var(--ink-soft);
  font-family: var(--font-mono);
  font-size: 0.72rem;
}

.mechanism-tag b {
  color: var(--simd-orange);
}

.scope-band {
  border-block: 1px solid var(--line);
  background: var(--surface);
}

.scope-band-inner {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
}

.scope-band-inner div {
  padding: 1.6rem 2rem;
}

.scope-band-inner div + div {
  border-left: 1px solid var(--line);
}

.scope-band strong,
.scope-band span {
  display: block;
}

.scope-band strong {
  font-size: 0.95rem;
}

.scope-band span {
  margin-top: 0.25rem;
  color: var(--ink-soft);
  font-size: 0.82rem;
}

.simd-section {
  padding-block: 6rem;
}

.section-intro {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  align-items: end;
  margin-bottom: 3rem;
  gap: 3rem;
}

.section-intro h2 {
  max-width: 12ch;
  margin: 0;
}

.section-intro p {
  max-width: 62ch;
  margin: 0;
  color: var(--ink-soft);
}

.portability-ledger {
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--line);
  list-style: none;
}

.portability-ledger li {
  display: grid;
  grid-template-columns: 4rem 15rem 1fr;
  align-items: baseline;
  padding-block: 1.5rem;
  border-bottom: 1px solid var(--line);
  gap: 1.5rem;
}

.portability-ledger li > span {
  color: var(--simd-orange);
  font-family: var(--font-mono);
}

.portability-ledger p {
  margin: 0;
  color: var(--ink-soft);
}

.operation-field {
  background: var(--simd-graphite);
  color: var(--simd-cream);
}

.operation-field-inner {
  display: grid;
  grid-template-columns: 0.75fr 1.25fr;
  padding-block: 5rem;
  gap: 5rem;
}

.operation-field p {
  max-width: 52ch;
  color: oklch(79% 0.025 250);
}

.operation-field code:not(pre code) {
  border-color: oklch(44% 0.04 250);
  background: oklch(28% 0.04 250);
}

.inverse-button {
  color: var(--simd-cream);
}

.type-ruler {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  border-top: 1px solid oklch(42% 0.04 250);
}

.type-ruler div {
  display: flex;
  justify-content: space-between;
  padding: 1rem;
  border-bottom: 1px solid oklch(42% 0.04 250);
}

.type-ruler div:nth-child(odd) {
  border-right: 1px solid oklch(42% 0.04 250);
}

.type-ruler span {
  color: var(--simd-lime);
  font-family: var(--font-mono);
  font-size: 0.76rem;
}

.doc-hero {
  display: grid;
  grid-template-columns: 1fr minmax(18rem, 0.65fr);
  align-items: end;
  padding-block: 4.5rem 3rem;
  border-bottom: 1px solid var(--line);
  gap: 3rem;
}

.doc-hero h1 {
  max-width: none;
  margin: 0;
  font-size: clamp(3rem, 6vw, 5.8rem);
}

.doc-hero-copy {
  margin: 0;
  color: var(--ink-soft);
}

.breadcrumb {
  display: flex;
  margin: 0 0 1rem;
  padding: 0;
  gap: 0.45rem;
  color: var(--ink-soft);
  font-size: 0.8rem;
  list-style: none;
}

.breadcrumb li + li::before {
  margin-right: 0.45rem;
  color: var(--path);
  content: "/";
}

.docs-layout {
  display: grid;
  grid-template-columns: 13rem minmax(0, 1fr);
  align-items: start;
  padding-block: 3rem 6rem;
  gap: clamp(2.5rem, 6vw, 6rem);
}

.toc {
  position: sticky;
  top: 6rem;
}

.toc-title {
  margin-bottom: 0.7rem;
  color: var(--ink-soft);
  font-size: 0.72rem;
  font-weight: 650;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.toc ul {
  margin: 0;
  padding: 0;
  list-style: none;
}

.toc a {
  display: block;
  padding-block: 0.3rem;
  color: var(--ink-soft);
  font-size: 0.85rem;
  text-decoration: none;
}

.prose {
  min-width: 0;
  max-width: var(--reading);
}

.prose section + section {
  margin-top: 4.5rem;
}

.prose h2 {
  max-width: 20ch;
  font-size: clamp(2rem, 3.5vw, 3.1rem);
}

.prose h3 {
  margin-top: 2.5rem;
  font-size: 1.4rem;
}

.prose p,
.prose li,
.prose td {
  color: var(--ink-soft);
}

.prose pre {
  overflow-x: auto;
  padding: 1.2rem;
  border: 1px solid var(--code-line);
  border-radius: var(--radius-sm);
  background: var(--code-bg);
  color: var(--inverse);
  font-size: 0.86rem;
}

.semantic-callout {
  margin-block: 2rem;
  padding: 1.3rem 1.5rem;
  border: 1px solid color-mix(in oklch, var(--simd-orange) 65%, var(--line));
  background: color-mix(in oklch, var(--simd-orange) 8%, var(--surface));
}

.semantic-callout strong {
  display: block;
  margin-bottom: 0.35rem;
}

.semantic-callout p {
  margin: 0;
}

.support-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9rem;
}

.support-table th,
.support-table td {
  padding: 0.85rem;
  border-bottom: 1px solid var(--line);
  text-align: left;
  vertical-align: top;
}

.support-table th {
  color: var(--ink);
}

.support-table td.yes {
  color: var(--ink);
  font-weight: 650;
}

.next-links {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  margin-top: 4rem;
  border-top: 1px solid var(--line);
}

.next-links a {
  padding: 1.4rem 0;
  text-decoration: none;
}

.next-links a + a {
  padding-left: 1.4rem;
  border-left: 1px solid var(--line);
}

.next-links span {
  display: block;
  color: var(--ink-soft);
  font-size: 0.76rem;
}

@media (max-width: 920px) {
  .simd-hero {
    grid-template-columns: 1fr;
  }

  .lane-machine {
    width: 100%;
  }

  .section-intro,
  .operation-field-inner,
  .doc-hero {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 720px) {
  .simd-hero {
    min-height: auto;
    padding-block: 4rem;
  }

  .lane-machine figcaption,
  .mask-rule {
    grid-template-columns: 1fr;
  }

  .lane-machine figcaption {
    display: block;
  }

  .lane-machine figcaption strong {
    display: block;
  }

  .scope-band-inner,
  .docs-layout {
    grid-template-columns: 1fr;
  }

  .scope-band-inner div + div {
    border-top: 1px solid var(--line);
    border-left: 0;
  }

  .portability-ledger li {
    grid-template-columns: 3rem 1fr;
  }

  .portability-ledger p {
    grid-column: 2;
  }

  .toc {
    position: static;
    padding-bottom: 1.5rem;
    border-bottom: 1px solid var(--line);
  }
}

@media (max-width: 520px) {
  .lane-index span,
  .lane-row span {
    font-size: 0;
  }

  .lane-row span {
    min-height: 2.7rem;
  }

  .lane-zero::after {
    color: var(--simd-graphite);
    font-size: 0.62rem;
    content: "L0";
  }

  .type-ruler {
    grid-template-columns: 1fr;
  }

  .type-ruler div:nth-child(odd) {
    border-right: 0;
  }
}

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