/* zsasa site — hand-written, no framework. Dark by default; light via [data-theme="light"]. */

/* ---------- Tokens ---------- */

:root {
  --bg: #060606;
  --bg-2: #0f0f0f;
  --bg-3: #1b1b1b;
  --ink: #f1f1f1;
  --ink-2: #b6b6b6;
  --ink-3: #777;
  --line: #232323;
  --line-2: #3d3d3d;
  --accent: #f7a41d;
  --accent-ink: #f7a41d;
  --on-accent: #0a0a0a;
  --glow: rgba(247, 164, 29, 0.42);
  --grid: rgba(247, 164, 29, 0.055);

  --tk-kw: #f7a41d;
  --tk-str: #a8c98a;
  --tk-num: #d3a6e6;
  --tk-fn: #8fbde6;
  --tk-com: #6f6f6f;

  --note-info: #8fbde6;
  --note-tip: #a8c98a;
  --note-warn: #f7a41d;
  --note-danger: #ee8d7e;

  --display: "Chakra Petch", "Arial Narrow", system-ui, sans-serif;
  --sans: "Instrument Sans", system-ui, -apple-system, "Segoe UI", sans-serif;
  --mono: "JetBrains Mono", ui-monospace, "SF Mono", Menlo, monospace;

  --nav-h: 64px;
  --gutter: clamp(20px, 4vw, 56px);
  --cut: 12px;
  color-scheme: dark;
}

:root[data-theme="light"] {
  --bg: #f5f5f2;
  --bg-2: #eaeae6;
  --bg-3: #d9d9d4;
  --ink: #0e0e0e;
  --ink-2: #474747;
  --ink-3: #848484;
  --line: #d5d5d0;
  --line-2: #a9a9a3;
  --accent-ink: #8a5000;
  --glow: transparent;
  --grid: rgba(0, 0, 0, 0.05);

  --tk-kw: #8a5000;
  --tk-str: #3f6a25;
  --tk-num: #7a4590;
  --tk-fn: #245a8c;
  --tk-com: #848484;

  --note-info: #245a8c;
  --note-tip: #3f6a25;
  --note-warn: #a86200;
  --note-danger: #a8392b;
  color-scheme: light;
}

/* ---------- Base ---------- */

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--nav-h) + 24px);
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font: 400 16px/1.6 var(--sans);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

a {
  color: inherit;
  text-decoration-color: var(--line-2);
  text-underline-offset: 0.2em;
  text-decoration-thickness: 1px;
}

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

:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

::selection {
  background: var(--accent);
  color: var(--on-accent);
}

img,
canvas,
svg {
  display: block;
  max-width: 100%;
}

button {
  font: inherit;
  color: inherit;
}

.wrap {
  max-width: 1320px;
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.label {
  font: 500 11px/1.5 var(--mono);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--ink-3);
}

.tag {
  font: 500 12px/1.5 var(--mono);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent-ink);
}

.num {
  font-family: var(--mono);
  font-variant-numeric: tabular-nums;
}

.skip {
  position: absolute;
  left: -999px;
}

.skip:focus {
  left: 12px;
  top: 12px;
  z-index: 100;
  background: var(--bg);
  padding: 8px 12px;
}

/* Corner brackets, used on framed figures. */
.bk {
  position: absolute;
  width: 20px;
  height: 20px;
  border: 1.5px solid var(--accent);
  pointer-events: none;
}

.bk--tl {
  top: 0;
  left: 0;
  border-right: 0;
  border-bottom: 0;
}

.bk--tr {
  top: 0;
  right: 0;
  border-left: 0;
  border-bottom: 0;
}

.bk--bl {
  bottom: 0;
  left: 0;
  border-right: 0;
  border-top: 0;
}

.bk--br {
  bottom: 0;
  right: 0;
  border-left: 0;
  border-top: 0;
}

/* ---------- Nav ---------- */

.nav {
  position: sticky;
  top: 0;
  z-index: 50;
  height: var(--nav-h);
  border-top: 3px solid var(--accent);
  border-bottom: 1px solid var(--line);
  background: color-mix(in srgb, var(--bg) 84%, transparent);
  backdrop-filter: blur(14px) saturate(1.4);
  -webkit-backdrop-filter: blur(14px) saturate(1.4);
}

.nav__in {
  height: 100%;
  display: flex;
  align-items: center;
  gap: 32px;
}

.brand {
  display: flex;
  align-items: center;
  text-decoration: none;
}

.brand img {
  width: auto;
  height: 26px;
}

.foot .brand img {
  height: 96px;
}

/* The logo exists once per theme; only the one for the active theme is shown. */
.brand .brand__logo--light,
:root[data-theme="light"] .brand .brand__logo--dark {
  display: none;
}

:root[data-theme="light"] .brand .brand__logo--light {
  display: block;
}

.nav__links {
  display: flex;
  gap: 26px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.nav__links a,
.nav__aux > a:not(.cut) {
  display: block;
  padding: 6px 0;
  font: 600 13px var(--display);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--ink-2);
  text-decoration: none;
}

.nav__links a:hover,
.nav__aux > a:not(.cut):hover {
  color: var(--accent-ink);
}

.nav__links a[aria-current="page"] {
  color: var(--ink);
  box-shadow: inset 0 -2px 0 var(--accent);
}

.nav__aux {
  margin-left: auto;
  display: flex;
  align-items: center;
  gap: 16px;
}

.nav__ver {
  font: 500 11.5px var(--mono);
  color: var(--ink-3);
  padding: 3px 8px;
  border: 1px solid var(--line-2);
}

.iconbtn {
  display: grid;
  place-items: center;
  width: 34px;
  height: 34px;
  border: 1px solid var(--line-2);
  background: none;
  cursor: pointer;
}

.iconbtn:hover {
  border-color: var(--accent);
  color: var(--accent-ink);
}

.iconbtn svg {
  width: 15px;
  height: 15px;
}

.menu-btn,
.nav__m {
  display: none !important;
}

.ext::after {
  content: "↗";
  font-size: 0.85em;
  margin-left: 0.3em;
  color: var(--ink-3);
}

/* ---------- Buttons ---------- */

.cut {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 12px 20px;
  font: 700 13px var(--display);
  letter-spacing: 0.14em;
  text-transform: uppercase;
  text-decoration: none;
  color: var(--on-accent);
  background: var(--accent);
  clip-path: polygon(
    0 0,
    calc(100% - var(--cut)) 0,
    100% var(--cut),
    100% 100%,
    var(--cut) 100%,
    0 calc(100% - var(--cut))
  );
  transition: filter 0.15s;
}

.cut:hover {
  filter: brightness(1.12);
}

.cut--ghost {
  color: var(--accent-ink);
  background: color-mix(in srgb, var(--accent) 14%, transparent);
}

.cut--sm {
  --cut: 9px;
  padding: 9px 15px;
  font-size: 12px;
}

.cut .arrow {
  transition: transform 0.15s;
}

.cut:hover .arrow {
  transform: translateX(3px);
}

/* ---------- Hero ---------- */

.hero {
  position: relative;
  overflow: hidden;
  border-bottom: 1px solid var(--line);
}

.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background:
    linear-gradient(var(--grid) 1px, transparent 1px) 0 0 / 56px 56px,
    linear-gradient(90deg, var(--grid) 1px, transparent 1px) 0 0 / 56px 56px;
  -webkit-mask-image: radial-gradient(ellipse 80% 80% at 70% 45%, #000 20%, transparent 78%);
  mask-image: radial-gradient(ellipse 80% 80% at 70% 45%, #000 20%, transparent 78%);
}

.hero__grid {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: 24px;
  align-items: center;
  min-height: min(760px, calc(100vh - var(--nav-h) - 49px));
  padding-block: clamp(36px, 5vw, 64px);
}

.hero h1 {
  margin: 20px 0 0;
  font: 700 clamp(2.3rem, 4.6vw, 4.7rem) / 0.96 var(--display);
  letter-spacing: -0.01em;
  text-transform: uppercase;
}

.hero h1 span {
  display: block;
  white-space: nowrap;
}

.hero h1 .y {
  color: var(--accent);
  text-shadow: 0 0 42px var(--glow);
}

.hero h1 .o {
  color: transparent;
  -webkit-text-stroke: 1.5px var(--ink);
}

.hero__lede {
  max-width: 31em;
  margin: 28px 0 0;
  font-size: 1.06rem;
  color: var(--ink-2);
}

.hero__lede strong {
  color: var(--ink);
  font-weight: 600;
}

.hero__cta {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 32px;
}

.hud {
  display: flex;
  flex-wrap: wrap;
  gap: 0 28px;
  margin-top: 44px;
}

.hud div {
  min-width: 118px;
  padding: 12px 0 0;
  border-top: 1px solid var(--accent);
}

.hud b {
  display: block;
  font: 700 2rem/1 var(--display);
}

.hud b i {
  font-style: normal;
  font-size: 0.6em;
  margin-left: 0.14em;
  color: var(--accent-ink);
}

.hud span {
  display: block;
  margin-top: 8px;
}

.hud__note {
  margin: 14px 0 0;
  font-size: 12.5px;
  color: var(--ink-3);
}

.surface {
  position: relative;
  align-self: stretch;
  min-height: 440px;
}

.surface::before {
  content: "";
  position: absolute;
  inset: 8% 4%;
  pointer-events: none;
  background: radial-gradient(closest-side, color-mix(in srgb, var(--accent) 16%, transparent), transparent);
}

:root[data-theme="light"] .surface::before {
  display: none;
}

.surface canvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  cursor: grab;
  touch-action: pan-y;
}

.surface canvas:active {
  cursor: grabbing;
}

.readout {
  position: absolute;
  line-height: 1.75;
  pointer-events: none;
}

.readout b {
  color: var(--accent-ink);
  font-weight: 500;
}

.readout--tl {
  top: 14px;
  left: 18px;
}

.readout--br {
  right: 18px;
  bottom: 14px;
  text-align: right;
}

.strip {
  position: relative;
  border-top: 1px solid var(--line);
  padding: 14px 0;
}

.strip .wrap {
  display: flex;
  flex-wrap: wrap;
  gap: 6px 28px;
}

.strip span::before {
  content: "▸";
  margin-right: 8px;
  color: var(--accent-ink);
}

/* ---------- Sections ---------- */

.sec {
  padding: clamp(56px, 8vw, 108px) 0;
}

.sec + .sec {
  border-top: 1px solid var(--line);
}

.sec__grid {
  display: grid;
  grid-template-columns: minmax(0, 4fr) minmax(0, 8fr);
  gap: clamp(28px, 5vw, 72px);
  align-items: start;
}

.sec__head {
  position: sticky;
  top: calc(var(--nav-h) + 32px);
}

.sec__head h2 {
  margin: 14px 0 0;
  font: 700 clamp(1.8rem, 3vw, 2.7rem) / 1.02 var(--display);
  text-transform: uppercase;
  text-wrap: balance;
}

.sec__head p {
  margin: 18px 0 0;
  color: var(--ink-2);
  max-width: 30em;
}

.sec__head .more {
  display: inline-block;
  margin-top: 18px;
  font: 600 13px var(--display);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent-ink);
  text-decoration: none;
}

.sec__head .more:hover {
  text-decoration: underline;
}

.sub {
  display: block;
  margin: 0 0 10px;
}

.sub:not(:first-child) {
  margin-top: 30px;
}

/* Slice viewer */

.viewer {
  position: relative;
  border: 1px solid var(--line);
  background: var(--bg-2);
}

.viewer__bar {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  padding: 10px 14px;
  border-bottom: 1px solid var(--line);
  white-space: nowrap;
}

.viewer__bar b {
  color: var(--ink);
  font-weight: 500;
}

.viewer canvas {
  width: 100%;
  aspect-ratio: 7 / 5;
  touch-action: pan-y;
}

.viewer__foot {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  border-top: 1px solid var(--line);
}

.viewer__foot > div {
  padding: 10px 14px;
}

.viewer__foot > div + div {
  border-left: 1px solid var(--line);
}

.viewer__foot .num {
  display: block;
  margin-top: 2px;
  font-size: 15px;
}

.viewer__foot .num i {
  font-style: normal;
  color: var(--ink-3);
}

.viewer__scrub {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 8px 14px 10px;
  border-top: 1px solid var(--line);
}

.viewer__scrub input {
  flex: 1;
  appearance: none;
  -webkit-appearance: none;
  height: 16px;
  margin: 0;
  background: repeating-linear-gradient(90deg, var(--line-2) 0 1px, transparent 1px 10px) center / 100% 6px
    no-repeat;
  cursor: ew-resize;
}

.viewer__scrub input::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 3px;
  height: 16px;
  background: var(--accent);
  border: 0;
  border-radius: 0;
}

.viewer__scrub input::-moz-range-thumb {
  width: 3px;
  height: 16px;
  background: var(--accent);
  border: 0;
  border-radius: 0;
}

.viewer__cap {
  margin: 12px 0 0;
  font-size: 13px;
  color: var(--ink-3);
}

.legend {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin-right: 14px;
  white-space: nowrap;
}

.legend::before {
  content: "";
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--accent);
}

.legend--buried::before {
  width: 4px;
  height: 4px;
  background: var(--ink-3);
}

.legend--atom::before {
  width: 10px;
  height: 10px;
  background: color-mix(in srgb, var(--ink) 16%, transparent);
  border: 1px solid var(--ink-3);
}

/* Bars */

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

.bars__head,
.bars li {
  display: grid;
  grid-template-columns: 180px minmax(0, 1fr) 84px 96px;
  align-items: center;
  gap: 16px;
  padding: 13px 0;
  border-bottom: 1px solid var(--line);
}

.bars__head {
  padding-top: 0;
}

.bars__head span:nth-child(n + 3),
.bars li .num {
  text-align: right;
}

.bars li > span:first-child {
  font: 600 15px var(--display);
  letter-spacing: 0.03em;
  color: var(--ink-2);
}

.bars .num {
  font-size: 13.5px;
  color: var(--ink-2);
}

.bars .num b {
  color: var(--ink);
  font-weight: 500;
}

.bar {
  height: 8px;
  background: var(--bg-3);
}

.bar i {
  display: block;
  height: 100%;
  width: calc(var(--v) * 1%);
  background: var(--ink-3);
  transform-origin: left;
  transform: scaleX(0);
  transition: transform 0.9s cubic-bezier(0.2, 0.7, 0.1, 1);
  transition-delay: calc(var(--i) * 60ms);
}

.in .bar i {
  transform: none;
}

.bars .is-z > span:first-child {
  color: var(--ink);
}

.bars .is-z .bar i {
  background: var(--accent);
  box-shadow: 0 0 14px var(--glow);
}

.bars__cap {
  margin: 14px 0 0;
  font-size: 13px;
  color: var(--ink-3);
}

/* Feature grid */

.feat {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  border-top: 1px solid var(--line);
  border-left: 1px solid var(--line);
}

.feat > div {
  padding: 24px 26px 28px;
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  transition: background 0.2s;
}

.feat > div:hover {
  background: var(--bg-2);
}

.feat h3 {
  margin: 12px 0 0;
  font: 600 1.2rem/1.2 var(--display);
  text-transform: uppercase;
  letter-spacing: 0.02em;
}

.feat p {
  margin: 10px 0 0;
  font-size: 15px;
  color: var(--ink-2);
}

/* Integrations */

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

.integ a {
  display: grid;
  grid-template-columns: minmax(0, 5fr) minmax(0, 7fr) auto;
  gap: 16px;
  align-items: baseline;
  padding: 17px 0;
  border-bottom: 1px solid var(--line);
  text-decoration: none;
  transition: padding 0.2s, background 0.2s;
}

.integ a:hover {
  padding-left: 12px;
  background: var(--bg-2);
}

.integ b {
  font: 700 1.45rem/1 var(--display);
  text-transform: uppercase;
  letter-spacing: 0.02em;
}

.integ span {
  font-size: 14.5px;
  color: var(--ink-2);
}

.integ i {
  padding-right: 12px;
  font-style: normal;
  color: var(--ink-3);
  transition: color 0.2s, transform 0.2s;
}

.integ a:hover i {
  color: var(--accent-ink);
  transform: translateX(4px);
}

/* Cite */

.cite blockquote {
  margin: 0 0 22px;
  font: 600 clamp(1.25rem, 2vw, 1.7rem) / 1.25 var(--display);
  text-wrap: balance;
}

.cite blockquote footer {
  margin-top: 12px;
  font: 400 14.5px/1.5 var(--sans);
  color: var(--ink-2);
}

/* ---------- Code ---------- */

code {
  font-family: var(--mono);
  font-size: 0.875em;
}

:not(pre) > code {
  padding: 0.12em 0.36em;
  background: var(--bg-2);
  border: 1px solid var(--line);
  font-size: 0.84em;
  overflow-wrap: anywhere;
}

.code {
  position: relative;
  margin: 1.2em 0;
  border: 1px solid var(--line);
  background: var(--bg-2);
}

.code pre {
  margin: 0;
  padding: 16px 96px 16px 18px;
  overflow-x: auto;
  font: 400 13.5px/1.65 var(--mono);
  tab-size: 2;
}

.code pre code {
  font-size: inherit;
}

.code__lang {
  position: absolute;
  top: 0;
  right: 0;
  display: flex;
  align-items: center;
}

.code__lang span {
  padding: 5px 8px;
  font: 500 10.5px var(--mono);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--ink-3);
}

.copy {
  padding: 5px 9px;
  font: 500 10.5px var(--mono);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--ink-2);
  background: var(--bg);
  border: 0;
  border-left: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  cursor: pointer;
}

.copy:hover {
  color: var(--on-accent);
  background: var(--accent);
}

.code :is(.k, .kn, .kd, .kc, .kr, .kt, .ow, .nt) {
  color: var(--tk-kw);
}

.code :is(.s, .s1, .s2, .sa, .sb, .sd, .si, .se, .sh, .ld) {
  color: var(--tk-str);
}

.code :is(.m, .mi, .mf, .mh, .il) {
  color: var(--tk-num);
}

.code :is(.nf, .nc, .nb, .nn, .na, .nv) {
  color: var(--tk-fn);
}

.code :is(.c, .c1, .cm, .ch, .cp) {
  color: var(--tk-com);
  font-style: italic;
}

/* Tabs */

.tabs {
  margin: 1.2em 0;
}

.tabs__list {
  display: flex;
  border: 1px solid var(--line);
  border-bottom: 0;
  overflow-x: auto;
}

.tabs__list button {
  padding: 10px 18px;
  font: 600 12.5px var(--display);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--ink-3);
  background: none;
  border: 0;
  border-right: 1px solid var(--line);
  cursor: pointer;
  white-space: nowrap;
}

.tabs__list button:hover {
  color: var(--ink);
}

.tabs__list button[aria-selected="true"] {
  color: var(--accent-ink);
  background: var(--bg-2);
  box-shadow: inset 0 2px 0 var(--accent);
}

.tabs__panel > .code:first-child {
  margin-top: 0;
}

.tabs__panel > .code:last-child {
  margin-bottom: 0;
}

.tabs__panel > .code + .code {
  margin-top: -1px;
}

.tabs__panel > p {
  margin: 0;
  padding: 10px 18px;
  font-size: 13.5px;
  color: var(--ink-2);
  border: 1px solid var(--line);
  border-top: 0;
}

/* ---------- Footer ---------- */

.foot {
  border-top: 1px solid var(--line);
  padding: 56px 0 40px;
  font-size: 14.5px;
}

.foot__grid {
  display: grid;
  grid-template-columns: minmax(0, 5fr) repeat(3, minmax(0, 2fr));
  gap: 32px;
}

.foot__brand p {
  margin: 14px 0 0;
  max-width: 26em;
  color: var(--ink-2);
}

.foot ul {
  margin: 12px 0 0;
  padding: 0;
  list-style: none;
}

.foot li + li {
  margin-top: 7px;
}

.foot li a {
  color: var(--ink-2);
  text-decoration: none;
}

.foot li a:hover {
  color: var(--accent-ink);
}

.foot__legal {
  margin-top: 48px;
  padding-top: 18px;
  border-top: 1px solid var(--line);
  display: flex;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
}

/* ---------- Docs ---------- */

.doc {
  display: grid;
  grid-template-columns: 236px minmax(0, 1fr) 208px;
  gap: clamp(28px, 4vw, 64px);
  align-items: start;
}

.side,
.toc {
  position: sticky;
  top: var(--nav-h);
  max-height: calc(100vh - var(--nav-h));
  overflow-y: auto;
  padding: 36px 0 48px;
  scrollbar-width: thin;
  scrollbar-color: var(--line-2) transparent;
}

.side {
  border-right: 1px solid var(--line);
  padding-right: 20px;
}

.side__group + .side__group {
  margin-top: 26px;
}

.side__group > .label {
  color: var(--accent-ink);
}

.side ul {
  margin: 8px 0 0;
  padding: 0;
  list-style: none;
}

.side ul ul {
  margin: 2px 0 6px 10px;
  padding-left: 10px;
  border-left: 1px solid var(--line);
}

.side a {
  display: block;
  padding: 4px 10px;
  margin-left: -10px;
  font-size: 14.5px;
  color: var(--ink-2);
  text-decoration: none;
  border-left: 2px solid transparent;
}

.side a:hover {
  color: var(--ink);
}

.side a[aria-current="page"] {
  color: var(--ink);
  font-weight: 600;
  border-left-color: var(--accent);
  background: var(--bg-2);
}

.toc ul {
  margin: 10px 0 0;
  padding: 0;
  list-style: none;
  border-left: 1px solid var(--line);
}

.toc a {
  display: block;
  padding: 3px 0 3px 12px;
  margin-left: -1px;
  font-size: 13px;
  line-height: 1.45;
  color: var(--ink-3);
  text-decoration: none;
  border-left: 1px solid transparent;
}

.toc a.d3 {
  padding-left: 24px;
}

.toc a:hover {
  color: var(--ink);
}

.toc a.on {
  color: var(--accent-ink);
  border-left-color: var(--accent);
}

.article {
  min-width: 0;
  padding: 36px 0 80px;
  max-width: 800px;
}

.crumbs {
  margin: 0 0 18px;
}

.crumbs span:first-child {
  color: var(--accent-ink);
}

.crumbs span + span::before {
  content: "/";
  margin: 0 0.6em;
  color: var(--line-2);
}

.prose > :first-child {
  margin-top: 0;
}

.prose h1 {
  margin: 0 0 0.55em;
  font: 700 clamp(2.1rem, 4vw, 3.1rem) / 1 var(--display);
  text-transform: uppercase;
  overflow-wrap: anywhere;
}

.prose h1 + p {
  font-size: 1.08rem;
  color: var(--ink-2);
}

.prose h2 {
  margin: 2.4em 0 0.6em;
  padding-top: 1.1em;
  border-top: 1px solid var(--line);
  font: 600 1.7rem/1.15 var(--display);
}

.prose h3 {
  margin: 2em 0 0.5em;
  font: 600 1.2rem/1.3 var(--display);
}

.prose h4 {
  margin: 1.6em 0 0.4em;
  font: 600 1.02rem/1.3 var(--display);
}

.prose :is(h2, h3, h4) code {
  font-size: 0.86em;
}

.prose p,
.prose ul,
.prose ol {
  margin: 0 0 1.1em;
}

.prose ul,
.prose ol {
  padding-left: 1.3em;
}

.prose li + li {
  margin-top: 0.35em;
}

.prose li::marker {
  color: var(--accent-ink);
}

.prose li > ul,
.prose li > ol {
  margin: 0.35em 0 0;
}

.prose a {
  color: var(--accent-ink);
  text-decoration-color: color-mix(in srgb, var(--accent-ink) 40%, transparent);
}

.prose a:hover {
  text-decoration-color: currentColor;
}

.prose strong {
  font-weight: 600;
}

.prose hr {
  border: 0;
  border-top: 1px solid var(--line);
  margin: 2.4em 0;
}

.prose blockquote {
  margin: 1.4em 0;
  padding: 2px 0 2px 18px;
  border-left: 2px solid var(--accent);
  color: var(--ink-2);
}

.prose img {
  height: auto;
}

.prose p > a > img,
.prose p > img {
  margin: 1.4em 0 0.6em;
  border: 1px solid var(--line);
  background: #fff;
}

.prose p[align="center"] img {
  margin: 0 auto;
  border: 0;
  background: none;
}

.prose details {
  margin: 1.4em 0;
  border: 1px solid var(--line);
  background: var(--bg-2);
}

.prose summary {
  padding: 10px 16px;
  font: 600 14px var(--display);
  letter-spacing: 0.04em;
  cursor: pointer;
}

.prose details[open] summary {
  border-bottom: 1px solid var(--line);
}

.prose details > :not(summary) {
  margin-inline: 16px;
}

.header-anchor {
  margin-left: 0.3em;
  font: 400 0.7em var(--mono);
  color: var(--ink-3) !important;
  text-decoration: none;
  opacity: 0;
}

:is(h2, h3, h4):hover .header-anchor,
.header-anchor:focus {
  opacity: 1;
}

.table {
  margin: 1.4em 0;
  overflow-x: auto;
  border-top: 1px solid var(--line-2);
  border-bottom: 1px solid var(--line-2);
}

.table table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
  line-height: 1.45;
}

.table th {
  padding: 9px 14px 9px 0;
  font: 500 11px/1.4 var(--mono);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  text-align: left;
  color: var(--ink-3);
  border-bottom: 1px solid var(--line-2);
  white-space: nowrap;
}

.table td {
  padding: 9px 14px 9px 0;
  border-bottom: 1px solid var(--line);
  vertical-align: top;
}

.table tr:last-child td {
  border-bottom: 0;
}

.table :is(th, td):last-child {
  padding-right: 0;
}

.note {
  margin: 1.5em 0;
  padding: 14px 18px 2px;
  border: 1px solid var(--line);
  border-left: 3px solid var(--c, var(--note-info));
  background: var(--bg-2);
  font-size: 15px;
}

.note__t {
  margin: 0 0 6px !important;
  font: 500 11.5px/1.5 var(--mono);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--c, var(--note-info));
}

.note--tip {
  --c: var(--note-tip);
}

.note--warning,
.note--caution {
  --c: var(--note-warn);
}

.note--danger {
  --c: var(--note-danger);
}

/* Benchmark figures (raw HTML blocks in the benchmark pages). */

.benchmarkFigureGrid {
  display: grid;
  gap: 12px;
  margin: 1.2em 0 0.5em;
}

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

.benchmarkFigureFull {
  margin: 1.2em 0 0.5em;
}

:is(.benchmarkFigureGrid, .benchmarkFigureFull) a {
  display: block;
  padding: 6px;
  border: 1px solid var(--line);
  background: #fff;
  transition: border-color 0.15s;
}

:is(.benchmarkFigureGrid, .benchmarkFigureFull) a:hover {
  border-color: var(--accent);
}

:is(.benchmarkFigureGrid, .benchmarkFigureFull) img {
  width: 100%;
  height: auto;
}

.benchmarkFigureCaption {
  margin-top: 0.4em !important;
  font-size: 13.5px;
  color: var(--ink-2);
}

.pager {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  margin-top: 28px;
}

.pager a {
  padding: 16px 18px;
  border: 1px solid var(--line);
  text-decoration: none;
  transition: border-color 0.15s;
}

.pager a:hover {
  border-color: var(--accent);
}

.pager a b {
  display: block;
  margin-top: 4px;
  font: 600 1.15rem/1.2 var(--display);
}

.pager .next {
  grid-column: 2;
  text-align: right;
}

.edit {
  display: inline-block;
  margin-top: 56px;
  font-size: 13.5px;
  color: var(--ink-3);
}

/* ---------- Responsive ---------- */

@media (max-width: 1100px) {
  .doc {
    grid-template-columns: 220px minmax(0, 1fr);
  }

  .toc {
    display: none;
  }

  .nav__ver {
    display: none;
  }
}

@media (max-width: 900px) {
  .hero__grid,
  .sec__grid {
    grid-template-columns: minmax(0, 1fr);
  }

  .hero__grid {
    min-height: 0;
  }

  .surface {
    min-height: 340px;
  }

  .sec__head {
    position: static;
  }

  .foot__grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .foot__brand {
    grid-column: 1 / -1;
  }

  .nav__links,
  .nav__aux > .ext,
  .nav__aux > .cut {
    display: none;
  }

  .nav__aux > .nav__m {
    display: block !important;
  }

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

  .menu-btn:not([hidden]) {
    display: grid !important;
  }

  .side {
    position: fixed;
    inset: var(--nav-h) 0 0 0;
    z-index: 40;
    max-height: none;
    padding: 24px var(--gutter) 48px;
    border-right: 0;
    background: var(--bg);
    display: none;
  }

  .side a {
    font-size: 16px;
    padding-block: 7px;
  }

  body.menu-open {
    overflow: hidden;
  }

  body.menu-open .side {
    display: block;
  }
}

@media (max-width: 620px) {
  .hud {
    gap: 0 16px;
  }

  .hud div {
    min-width: 0;
    flex: 1;
  }

  .hud b {
    font-size: 1.5rem;
  }

  .feat,
  .benchmarkFigureGrid--2 {
    grid-template-columns: minmax(0, 1fr);
  }

  .bars__head,
  .bars li {
    grid-template-columns: minmax(0, 1fr) 76px 88px;
    row-gap: 6px;
  }

  .bars__head span:nth-child(2) {
    display: none;
  }

  .bars li .bar {
    grid-column: 1 / -1;
    grid-row: 2;
  }

  .integ a {
    grid-template-columns: minmax(0, 1fr) auto;
  }

  .integ span {
    grid-column: 1;
    grid-row: 2;
  }

  .viewer__foot .label,
  .viewer__bar .label {
    font-size: 9.5px;
    letter-spacing: 0.05em;
  }

  .viewer__foot .num {
    font-size: 13px;
  }

  .readout {
    font-size: 9.5px;
  }
}

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

  *,
  *::before,
  *::after {
    transition: none !important;
    animation: none !important;
  }

  .bar i {
    transform: none;
  }
}

/* ---------- Charts ---------- */

/* Categorical slots, validated for colour-vision deficiency on both surfaces:
   zsasa, the reference implementation, the Rust implementation, other. */
:root {
  --c-zsasa: #f7a41d;
  --c-ref: #3987e5;
  --c-rust: #d55181;
  --c-other: #008300;
}

:root[data-theme="light"] {
  --c-zsasa: #eda100;
  --c-ref: #2a78d6;
  --c-rust: #e87ba4;
  --c-other: #008300;
}

.t-zsasa {
  --c: var(--c-zsasa);
}

.t-ref {
  --c: var(--c-ref);
}

.t-rust {
  --c: var(--c-rust);
}

.t-other {
  --c: var(--c-other);
}

.t-ink {
  --c: var(--ink-2);
}

.chart {
  margin: 1.8em 0;
  border: 1px solid var(--line);
  background: var(--bg-2);
}

.chart__head {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  justify-content: space-between;
  gap: 12px 24px;
  padding: 16px 18px 12px;
  border-bottom: 1px solid var(--line);
}

.chart__title {
  margin: 0 !important;
  font: 600 1.05rem/1.25 var(--display);
}

.chart__controls {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 18px;
}

.chart__ctl {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.seg {
  display: flex;
  flex-wrap: wrap;
  border: 1px solid var(--line-2);
}

.seg button {
  padding: 5px 10px;
  font: 500 11.5px var(--mono);
  color: var(--ink-2);
  background: none;
  border: 0;
  box-shadow: 1px 0 0 var(--line-2);
  cursor: pointer;
}

.seg button:hover {
  color: var(--ink);
}

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

.chart__legend {
  display: flex;
  flex-wrap: wrap;
  gap: 6px 18px;
  padding: 12px 18px 0;
  font-size: 12.5px;
  color: var(--ink-2);
}

.chart__legend:empty,
.chart__stats:empty {
  display: none;
}

.chart__legend-i {
  display: inline-flex;
  align-items: center;
  gap: 7px;
}

.chart__body {
  position: relative;
  margin: 12px 14px 0;
}

.chart__svg {
  display: block;
  overflow: visible;
  outline-offset: 4px;
}

.chart__svg text {
  font: 500 11px var(--mono);
  fill: var(--ink-3);
}

.chart__svg .title {
  fill: var(--ink-2);
  letter-spacing: 0.04em;
}

.chart__svg .name {
  font: 500 12.5px var(--sans);
  fill: var(--ink-2);
}

.chart__svg .value {
  fill: var(--ink);
}

.chart__svg .lbl {
  font: 500 11.5px var(--sans);
  fill: var(--ink-2);
  paint-order: stroke;
  stroke: var(--bg-2);
  stroke-width: 3px;
  stroke-linejoin: round;
}

.chart__svg .strong {
  fill: var(--ink);
  font-weight: 600;
}

.chart__svg .empty {
  font: 500 13px var(--sans);
}

.chart__svg .grid {
  stroke: var(--line);
}

.chart__svg :is(.tick, .base, .lead) {
  stroke: var(--line-2);
}

.chart__svg :is(.zero, .cross) {
  stroke: var(--ink-3);
}

.chart__svg .bar {
  fill: var(--c);
}

.chart__svg .row {
  outline: none;
}

.chart__svg .hit {
  fill: transparent;
}

.chart__svg .row:is(:hover, :focus-visible) .hit {
  fill: color-mix(in srgb, var(--ink) 7%, transparent);
}

.m {
  fill: var(--c);
  stroke: var(--bg-2);
  stroke-width: 2;
}

.m.hollow {
  fill: var(--bg-2);
  stroke: var(--c);
}

.m.on {
  stroke: var(--ink);
}

.chart__key {
  flex: none;
}

.chart__key .m {
  stroke-width: 1.5;
}

.ln {
  fill: none;
  stroke: var(--c);
  stroke-width: 2;
  stroke-linejoin: round;
  stroke-linecap: round;
}

.chart__svg .area {
  fill: var(--c);
  opacity: 0.13;
}

.chart__svg .wh line {
  stroke: var(--c);
  stroke-width: 1.25;
  opacity: 0.8;
}

.chart__svg .dots {
  fill: none;
  stroke: var(--c);
  stroke-width: 3;
  stroke-linecap: round;
  opacity: 0.55;
}

.chart__svg .ring {
  fill: none;
  stroke: var(--ink);
  stroke-width: 1.5;
}

.chart__tip {
  position: absolute;
  z-index: 5;
  pointer-events: none;
  min-width: 120px;
  padding: 8px 10px;
  background: var(--bg);
  border: 1px solid var(--line-2);
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.35);
  font-size: 12.5px;
  line-height: 1.45;
}

.chart__tip-t {
  margin-bottom: 4px;
  font: 500 10.5px var(--mono);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ink-3);
}

.chart__tip-r {
  display: flex;
  align-items: center;
  gap: 7px;
  white-space: nowrap;
}

.chart__tip-r b {
  font: 500 12.5px var(--mono);
  color: var(--ink);
}

.chart__tip-r span,
.chart__tip-f {
  color: var(--ink-2);
}

.chart__tip-f {
  margin-top: 4px;
  font-size: 12px;
}

.chart__stats {
  margin: 8px 18px 0 !important;
  font: 500 11.5px/1.5 var(--mono);
  color: var(--ink-2);
}

.chart__note {
  padding: 10px 18px 14px;
  font-size: 13px;
  color: var(--ink-3);
}

.chart .chart__data {
  margin: 0;
  border: 0;
  border-top: 1px solid var(--line);
  background: none;
}

.chart .chart__data summary {
  padding: 8px 18px;
  font: 500 11px var(--mono);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--ink-3);
  cursor: pointer;
}

.chart .chart__data .table {
  margin: 0 18px 14px;
}

.table-cap {
  margin: -0.8em 0 1.6em !important;
  font-size: 13px;
  color: var(--ink-3);
}