/* Bytepleat site: layout and components. Colour, type, spacing and motion come
   from tokens.css. Rhythm is 8px (space-2 and multiples); hairlines replace
   tinted cards; radii are 4px. */

:root { --site-radius: 4px; }

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

html { -webkit-text-size-adjust: 100%; scroll-padding-top: var(--space-5); }
@media (min-width: 960px) { html { scroll-padding-top: calc(64px + var(--space-5)); } }
@media (prefers-reduced-motion: no-preference) { html { scroll-behavior: smooth; } }

body {
  margin: 0;
  background: var(--color-bg);
  color: var(--color-text);
  font-family: var(--font-sans);
  font-size: var(--site-text-body);
  line-height: 1.6;
  font-weight: var(--weight-regular);
  font-variant-numeric: normal;
  text-rendering: optimizeLegibility;
}

img, svg { max-width: 100%; }
p { margin: 0 0 var(--space-4); }
ul, ol, dl, dd { margin: 0; }

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

/* Type scale: Instrument Sans for prose, JetBrains Mono for data (see .bench). */
h1, h2, h3, h4 { margin: 0; text-wrap: balance; }
h1 {
  font-size: var(--site-text-h1);
  line-height: 1.05;
  font-weight: var(--weight-bold);
  font-stretch: var(--stretch-display);
  letter-spacing: var(--tracking-display);
  max-inline-size: 18ch;
}
h2 {
  font-size: var(--site-text-h2);
  line-height: 1.15;
  font-weight: var(--weight-semibold);
  font-stretch: var(--stretch-title);
  letter-spacing: var(--tracking-title);
}
h3, h4 { font-size: var(--site-text-h3); line-height: 1.3; font-weight: var(--weight-semibold); }

code, pre, samp, kbd { font-family: var(--font-mono); font-variant-numeric: tabular-nums; }
:not(pre) > code, samp {
  font-size: 0.875em;
  background: var(--color-fold-light);
  border-radius: var(--site-radius);
  padding: 0 0.3em;
  overflow-wrap: anywhere;
}

:focus-visible { outline: var(--focus-width) solid var(--focus-color); outline-offset: var(--focus-offset); border-radius: 2px; }

.wrap { inline-size: min(var(--site-max), 100% - 2 * var(--gutter-site)); margin-inline: auto; }

.sr-only {
  position: absolute; inline-size: 1px; block-size: 1px; margin: -1px; padding: 0;
  overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; border: 0;
}

.skip {
  position: absolute; left: var(--space-4); top: -100px; z-index: 100;
  background: var(--color-accent); color: var(--color-on-accent);
  padding: var(--space-2) var(--space-4); border-radius: var(--site-radius); font-weight: var(--weight-semibold);
}
.skip:focus { top: var(--space-2); color: var(--color-on-accent); }

/* Status chip: the only pill-free label; text carries the meaning, colour only supports it. */
.chip {
  display: inline-flex; align-items: center;
  font-size: var(--site-text-small); line-height: 1; font-weight: var(--weight-semibold);
  font-stretch: 100%; letter-spacing: 0;
  padding: 0.3em 0.6em; border-radius: var(--site-radius);
  border: 1px solid var(--color-caution);
  background: var(--color-caution-bg); color: var(--color-caution-text);
  vertical-align: 0.2em;
}
.chip-lg { font-size: 1rem; vertical-align: 0.3em; margin-inline-start: var(--space-2); }

/* ---------- Buttons and links ---------- */
.button {
  display: inline-flex; align-items: center; justify-content: center;
  min-block-size: var(--control-height-lg);
  padding: 0 var(--space-5);
  border: 1px solid transparent;
  border-radius: var(--site-radius);
  font: inherit; font-weight: var(--weight-semibold); line-height: 1.2;
  text-decoration: none; text-align: center;
  transition: background-color var(--dur-instant) var(--ease-standard);
}
.button.primary { background: var(--color-accent); color: var(--color-on-accent); }
.button.primary:hover { background: var(--color-accent-hover); color: var(--color-on-accent); }
.text-link { font-weight: var(--weight-semibold); }

/* ---------- Header ---------- */
.site-header { border-bottom: 1px solid var(--color-border); background: var(--color-bg); }
@media (min-width: 960px) { .site-header { position: sticky; top: 0; z-index: 20; } }

.nav { display: flex; align-items: center; gap: var(--space-2) var(--space-5); min-block-size: 64px; position: relative; flex-wrap: wrap; }
.brand {
  display: inline-flex; align-items: center; gap: var(--space-2);
  color: var(--color-text); text-decoration: none;
  font-weight: var(--weight-bold); font-size: 1.1875rem; font-stretch: var(--stretch-title); letter-spacing: var(--tracking-title);
  margin-inline-end: auto; min-block-size: var(--row-height);
}
.brand:hover { color: var(--color-text); }
.mark { fill: var(--color-accent); flex: none; }
.nav-links { list-style: none; padding: 0; display: flex; flex-wrap: wrap; gap: var(--space-1) var(--space-5); }
.nav a { font-weight: var(--weight-semibold); }
.nav-links a, .nav-install { display: inline-flex; align-items: center; min-block-size: var(--row-height); color: var(--color-text); text-decoration: none; }
.nav-links a:hover, .nav-install:hover { color: var(--color-accent); text-decoration: underline; }
.nav-install { display: none; }
.menu-toggle, .theme-toggle {
  font: inherit; font-weight: var(--weight-semibold); color: var(--color-text);
  background: transparent; border: 1px solid var(--color-border-strong); border-radius: var(--site-radius);
  min-block-size: var(--row-height); min-inline-size: var(--row-height); padding: 0 var(--space-2); cursor: pointer;
}
.theme-toggle { display: inline-grid; place-items: center; padding: 0; }
.menu-toggle:hover, .theme-toggle:hover { background: var(--color-fold-light); }

@media (max-width: 639.98px) {
  .nav { flex-wrap: nowrap; column-gap: var(--space-2); }
  .js .nav-install { display: inline-flex; }
  .js .menu-toggle { display: inline-block; }
  .js .nav-links { display: none; }
  .js .nav-links.open {
    display: flex; flex-direction: column; gap: 0;
    position: absolute; top: 100%; left: 0; right: 0; z-index: 30;
    background: var(--color-surface); border: 1px solid var(--color-border); border-radius: var(--site-radius);
    padding: var(--space-2) var(--space-4); margin-top: var(--space-1);
  }
  .js .nav-links.open li:nth-child(n + 3) { border-top: 1px solid var(--color-border); }
  .js .nav-links.open a { min-block-size: 44px; inline-size: 100%; }
  .js .nav-links-install { display: none; }
}
@media (min-width: 640px) { .menu-toggle { display: none !important; } }

/* ---------- Hero ---------- */
.hero {
  display: grid; gap: var(--space-7);
  padding-block: clamp(2.5rem, 1.5rem + 5vw, 6rem) clamp(3rem, 2rem + 5vw, 6.5rem);
}
@media (min-width: 960px) {
  .hero { grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); align-items: start; gap: var(--space-8); }
  .hero .fold { margin-top: var(--space-1); }
}
.hero h1 { margin-bottom: var(--space-5); }
.lead { font-size: var(--site-text-lead); line-height: 1.5; color: var(--color-text-muted); max-inline-size: 36ch; margin-bottom: var(--space-6); }
.actions { display: flex; flex-wrap: wrap; align-items: center; gap: var(--space-2) var(--space-5); margin-bottom: var(--space-2); }
.actions .text-link { min-block-size: var(--control-height); display: inline-flex; align-items: center; }
@media (max-width: 639.98px) {
  .actions .button { inline-size: 100%; }
}
.meta { font-size: var(--site-text-small); line-height: 1.5; font-weight: var(--weight-book); color: var(--color-text-muted); margin-bottom: var(--space-5); overflow-wrap: anywhere; }
.status-line { font-size: var(--site-text-small); color: var(--color-text-muted); font-weight: var(--weight-book); margin: var(--space-4) 0 0; }
.status-line .chip { vertical-align: 0.05em; margin-inline-end: var(--space-1); }
/* Below 960 the fold sits right after the buttons; the command follows it. */
@media (max-width: 959.98px) {
  .hero { gap: 0; }
  .hero-copy { display: contents; }
  .hero-code, .full-command, .status-line { order: 2; }
  .hero .fold { order: 1; margin-block: var(--space-5) var(--space-7); }
}

/* ---------- Code blocks: hairline frame, no tint ---------- */
.code {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--site-radius);
  overflow: hidden;
}
.code-bar {
  display: flex; align-items: center; justify-content: space-between; gap: var(--space-2);
  padding: 0 var(--space-2) 0 var(--space-4);
  border-bottom: 1px solid var(--color-border);
  font-size: var(--site-text-small); font-weight: var(--weight-book); color: var(--color-text-muted);
  min-block-size: 44px;
}
.code pre {
  margin: 0; padding: var(--space-4);
  font-size: 0.875rem; line-height: 1.65;
  white-space: pre-wrap; overflow-wrap: anywhere;
  color: var(--color-text);
}
.copy {
  font: inherit; font-size: var(--site-text-small); font-weight: var(--weight-semibold);
  color: var(--color-accent); background: transparent;
  border: 1px solid transparent; border-radius: var(--site-radius);
  min-block-size: var(--row-height); min-inline-size: 4.5rem; padding: 0 var(--space-2); cursor: pointer;
  transition: background-color var(--dur-instant) var(--ease-standard);
}
.copy:hover { background: var(--color-fold-light); }
.copy.is-done { color: var(--color-text); }
.hero-code { max-inline-size: 36rem; }
.hero-code .code-bar { border-bottom: 0; min-block-size: 40px; }
.hero-code pre { padding-top: 0; color: var(--color-text); white-space: pre; overflow-wrap: normal; overflow-x: auto; scrollbar-width: thin; }
.hero-code pre:focus-visible { outline-offset: -2px; }
.hero-code .copy:hover { background: var(--color-surface); }
.full-command { max-inline-size: 36rem; margin-top: var(--space-2); }
.full-command summary { display: inline-flex; align-items: center; min-block-size: var(--row-height); cursor: pointer; font-weight: var(--weight-semibold); color: var(--color-accent); font-size: 1rem; }
.full-command summary:hover { color: var(--color-accent-hover); }
.full-note { font-size: var(--site-text-small); color: var(--color-text-muted); margin: var(--space-2) 0 var(--space-3); }

/* ---------- Hero fold (signature moment: the only expressive element) ---------- */
.fold { margin: 0; justify-self: center; inline-size: 100%; max-inline-size: 560px; }
.fold-stage {
  position: relative;
  container-type: inline-size;
  block-size: clamp(180px, 140px + 12.5vw, 320px);
  border-radius: var(--site-radius);
}
.fold-strips { position: absolute; inset: 0; border-radius: var(--site-radius); overflow: hidden; }
.strip {
  --dx: 0; --s: 1;
  position: absolute; top: 0; bottom: 0; left: 0; inline-size: 100%;
  overflow: hidden;
  background: var(--color-surface);
  transform-origin: 0 50%;
  clip-path: polygon(0 0, 100% 0, 100% 100%, 0 100%);
}
.is-split .strip { left: calc(var(--i) * 12.5%); inline-size: calc(12.5% + 1px); }
.is-split .strip:last-child { inline-size: 12.5%; }
.strip-in {
  inline-size: 100cqw; block-size: 100%;
  transform: translateX(calc(var(--i, 0) * -12.5cqw));
  transition: opacity 160ms linear calc(var(--dur-fold) - 160ms);
}
.fold-stage::after {
  content: ""; position: absolute; inset: 0; pointer-events: none;
  border: 1px solid var(--color-border); border-radius: var(--site-radius);
  transition: opacity 160ms linear calc(var(--dur-fold) - 160ms);
}
.is-folded .fold-strips { overflow: visible; }

.sheet-rows {
  list-style: none; padding: clamp(8px, 4cqw, 24px) clamp(16px, 6cqw, 32px);
  block-size: 100%; display: flex; flex-direction: column; justify-content: space-between;
}
.sheet-rows li {
  display: flex; justify-content: space-between; gap: var(--space-4); align-items: center;
  font-size: clamp(0.875rem, 0.8rem + 0.6cqw, 1.0625rem); line-height: 1.2;
  flex: 1; border-bottom: 1px solid var(--color-border);
}
.sheet-rows li:last-child { border-bottom: 0; }
.sheet-rows li span:first-child { font-weight: var(--weight-semibold); }
.sheet-rows li span:last-child { color: var(--color-text-muted); font-family: var(--font-mono); font-variant-numeric: tabular-nums; }

/* Folded: each strip becomes a pleat face. Shade faces are tall on the left,
   lit faces tall on the right, as in pleat.svg. */
.js .strip {
  transition:
    transform var(--dur-fold) var(--ease-fold) var(--delay, 0ms),
    clip-path var(--dur-fold) var(--ease-fold) var(--delay, 0ms),
    background-color var(--dur-fold) var(--ease-fold) var(--delay, 0ms);
}
.is-folded .strip {
  transform: translateX(calc(var(--dx) * 100%)) scaleX(var(--s));
  background: color-mix(in srgb, var(--color-accent) 36%, var(--color-bg));
  clip-path: polygon(0 0, 100% 12.5%, 100% 87.5%, 0 100%);
}
.is-folded .strip:nth-child(even) {
  background: var(--color-accent);
  clip-path: polygon(0 12.5%, 100% 0, 100% 100%, 0 87.5%);
}
.is-folded .strip-in, .is-folded .fold-stage::after, .fold.is-folded .fold-stage::after { opacity: 0; transition-delay: 0ms; }

.fold-caption {
  display: flex; align-items: center; justify-content: center; flex-wrap: wrap; gap: var(--space-1) var(--space-4);
  margin-top: var(--space-4); min-block-size: var(--row-height);
  font-size: 1rem; color: var(--color-text-muted);
}
.fold-label {
  opacity: 0; transform: translateY(4px);
  transition: opacity var(--dur-normal) var(--ease-exit), transform var(--dur-normal) var(--ease-exit);
}
.fold-label strong { color: var(--color-text); font-weight: var(--weight-semibold); }
.is-folded .fold-label {
  opacity: 1; transform: none;
  transition: opacity var(--dur-normal) var(--ease-enter) calc(var(--dur-fold) + 80ms), transform var(--dur-normal) var(--ease-enter) calc(var(--dur-fold) + 80ms);
}
.fold-toggle {
  font: inherit; font-weight: var(--weight-semibold); color: var(--color-accent);
  background: none; border: 0; border-radius: var(--site-radius);
  min-block-size: var(--row-height); padding: 0 var(--space-2); cursor: pointer;
  text-decoration: underline; text-underline-offset: 0.2em; text-decoration-thickness: 1px;
}
.fold-toggle:hover { color: var(--color-accent-hover); text-decoration-thickness: 2px; }

/* ---------- Benchmarks: neutral competitor bars, accent for Bytepleat ---------- */
.bench {
  display: grid; gap: 0;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 0.9375rem; line-height: 1.4;
  border-top: 1px solid var(--color-border-strong);
}
.bench-row {
  display: grid;
  grid-template-columns: minmax(0, 11rem) minmax(0, 1fr) minmax(4.5rem, auto);
  align-items: center; gap: var(--space-2) var(--space-4);
  padding-block: var(--space-2);
  border-bottom: 1px solid var(--color-border);
}
.bench-row > :first-child { font-family: var(--font-sans); color: var(--color-text); overflow-wrap: anywhere; }
.bench-row > :last-child { text-align: end; color: var(--color-text); }
/* --v is the bar length as a percentage, e.g. style="--v: 62%". */
.bar {
  display: block;
  inline-size: var(--v, 0%);
  min-block-size: 8px;
  max-inline-size: 100%;
  border-radius: 1px;
  background: var(--color-border-strong);
}
.bench-row.us { font-weight: var(--weight-semibold); }
.bench-row.us > :first-child { color: var(--color-accent); }
.bench-row.us .bar, .bar.us { background: var(--color-accent); }
.bench-note { font-family: var(--font-sans); font-size: var(--site-text-small); line-height: 1.5; color: var(--color-text-muted); max-inline-size: var(--measure); margin-top: var(--space-2); }
.src { display: block; font-family: var(--font-mono); font-size: var(--site-text-small); line-height: 1.5; color: var(--color-text-muted); margin-top: var(--space-2); overflow-wrap: anywhere; }
@media (max-width: 639.98px) {
  .bench-row { grid-template-columns: minmax(0, 1fr) auto; }
  .bench-row > :nth-child(2) { grid-column: 1 / -1; grid-row: 2; }
}

/* ---------- Sections ---------- */
.section { border-top: 1px solid var(--color-border); padding-block: clamp(3.5rem, 2.5rem + 3.5vw, 6rem); }
.section h2 { margin-bottom: var(--space-5); }
.section-lead { color: var(--color-text-muted); max-inline-size: var(--measure); margin-bottom: var(--space-6); }
.rail { display: grid; gap: var(--space-2) var(--space-8); }
@media (min-width: 960px) {
  .rail { grid-template-columns: 4fr 8fr; align-items: start; }
  .rail > h2, .rail > div:first-child > h2 { margin-bottom: var(--space-4); }
}
.rail-note { color: var(--color-text-muted); max-inline-size: 34ch; margin-bottom: var(--space-5); }

/* What it does: a definition list with hairline rules, not cards. */
.what { display: grid; gap: var(--space-7); align-items: center; }
@media (min-width: 960px) { .what { grid-template-columns: 5fr 7fr; gap: var(--space-8); } }
.modes > div { padding-block: var(--space-5); border-top: 1px solid var(--color-border); }
.modes > div:first-child { border-top: 0; padding-top: 0; }
.modes dt { font-size: var(--site-text-h3); line-height: 1.3; font-weight: var(--weight-semibold); margin-bottom: var(--space-1); }
.modes dd { color: var(--color-text-muted); max-inline-size: 46ch; }

/* App illustration: the desktop empty state, drawn with tokens. */
.appshot { margin: 0; min-inline-size: 0; }
.appshot figcaption { font-size: var(--site-text-small); font-weight: var(--weight-book); color: var(--color-text-muted); margin-top: var(--space-2); }
.appshot figcaption strong { color: var(--color-text); font-weight: var(--weight-semibold); }
.app {
  background: var(--color-bg);
  border: 1px solid var(--color-border-strong);
  border-radius: var(--site-radius);
  overflow: hidden;
  font-size: 0.875rem; line-height: 1.25rem;
  container-type: inline-size;
}
.app p { margin: 0; }
.app-head {
  display: flex; align-items: center; flex-wrap: wrap; gap: var(--space-2) var(--space-4);
  padding: var(--space-2) var(--space-4); min-block-size: 56px;
  border-bottom: 1px solid var(--color-border);
}
.app-brand { display: inline-flex; align-items: center; gap: var(--space-2); font-weight: var(--weight-semibold); font-size: 1rem; margin-inline-end: auto; }
.app-brand svg { fill: var(--color-accent); }
.app-brand .chip { font-size: 0.875rem; vertical-align: 0; }
.app-appear { display: inline-grid; place-items: center; color: var(--color-text-muted); }
.seg {
  display: inline-flex; flex-wrap: wrap; padding: 2px; gap: 2px;
  border: 1px solid var(--color-border); border-radius: var(--site-radius);
}
.seg > span { padding: 4px 12px; border-radius: 2px; font-weight: var(--weight-semibold); color: var(--color-text-muted); }
.seg > span.on { background: var(--color-fold-light); color: var(--color-text); }
.app-body { padding: var(--space-4); }
.app-title { font-size: 1.25rem; line-height: 1.625rem; font-weight: var(--weight-semibold); font-stretch: var(--stretch-title); letter-spacing: var(--tracking-title); }
.app-sub { color: var(--color-text-muted); margin-bottom: var(--space-2) !important; }
.drop {
  display: grid; justify-items: center; text-align: center; gap: var(--space-2);
  padding: var(--space-6) var(--space-4);
  border: 1px dashed var(--color-border-strong); border-radius: var(--site-radius);
  background: var(--color-surface);
}
.drop-pleat { color: var(--color-accent); fill: currentColor; inline-size: min(160px, 60%); block-size: auto; margin-bottom: var(--space-1); }
.drop-title { font-size: clamp(1.125rem, 0.9rem + 1.2cqw, 1.75rem); line-height: 1.15; font-weight: var(--weight-bold); font-stretch: 92%; letter-spacing: var(--tracking-display); }
.drop-buttons { display: flex; flex-wrap: wrap; justify-content: center; gap: var(--space-2); margin-top: var(--space-1) !important; }
.abtn {
  display: inline-flex; align-items: center; min-block-size: 32px; padding: 0 var(--space-2);
  border: 1px solid var(--color-border-strong); border-radius: var(--site-radius);
  background: var(--color-surface); font-weight: var(--weight-semibold);
}
.abtn-primary { background: var(--color-accent); color: var(--color-on-accent); border-color: transparent; min-block-size: 40px; padding: 0 var(--space-4); }
.abtn-primary.is-disabled { background: var(--color-fold-shade); color: var(--color-text-muted); }
.drop-note { color: var(--color-text-muted); }
.app-format { display: flex; flex-wrap: wrap; gap: var(--space-2) var(--space-4); align-items: baseline; margin-top: var(--space-4); }
.app-label { font-weight: var(--weight-semibold); }
.app-help { color: var(--color-text-muted); margin-top: var(--space-1) !important; }
.app-band {
  display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: var(--space-2) var(--space-4);
  padding: var(--space-2) var(--space-4); min-block-size: 72px;
  background: var(--color-surface); border-top: 1px solid var(--color-border);
}
.band-dest { display: flex; flex-wrap: wrap; gap: var(--space-2); }
.app .muted { color: var(--color-text-muted); }
.app-link { color: var(--color-accent); font-weight: var(--weight-semibold); }
.band-action { display: flex; align-items: center; flex-wrap: wrap; gap: var(--space-3); }
.band-reason { color: var(--color-text-muted); }

/* Promises: two columns of hairline-separated statements. */
.promises { display: grid; gap: 0 var(--space-7); }
@media (min-width: 960px) { .promises { grid-template-columns: 1fr 1fr; } }
.promises > div { padding-block: var(--space-5); border-top: 1px solid var(--color-border); }
.promises dt { font-weight: var(--weight-semibold); font-size: var(--site-text-h3); line-height: 1.3; margin-bottom: var(--space-1); }
.promises dd { color: var(--color-text-muted); }
@media (min-width: 960px) {
  .promises > div:nth-child(-n + 2) { border-top: 0; padding-top: 0; }
}
@media (max-width: 959.98px) { .promises > div:first-child { border-top: 0; padding-top: 0; } }

/* Install tabs */
.tabs {
  display: flex; gap: var(--space-2);
  border-bottom: 1px solid var(--color-border);
  margin-bottom: var(--space-6);
  overflow-x: auto; scrollbar-width: thin;
}
.tabs[hidden] { display: none; }
.tabs [role="tab"] {
  flex: none;
  font: inherit; font-weight: var(--weight-semibold); color: var(--color-text-muted);
  background: none; border: 0; border-bottom: 2px solid transparent;
  min-block-size: 44px; padding: 0 var(--space-2); margin-bottom: -1px; cursor: pointer;
  transition: color var(--dur-fast) var(--ease-standard), border-color var(--dur-fast) var(--ease-standard);
}
.tabs [role="tab"]:hover { color: var(--color-text); }
.tabs [role="tab"][aria-selected="true"] { color: var(--color-text); border-bottom-color: var(--color-accent); }
.tabs [role="tab"]:focus-visible { outline-offset: -2px; }

.panel + .panel { margin-top: var(--space-8); }
.js .panel + .panel { margin-top: 0; }
.panel h3 { margin-bottom: var(--space-2); }
.js .panel > h3 { position: absolute; inline-size: 1px; block-size: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }
.panel[hidden] { display: none; }
.req { color: var(--color-text-muted); max-inline-size: var(--measure); }
.panel-actions { display: flex; flex-wrap: wrap; align-items: center; gap: var(--space-2) var(--space-5); margin-bottom: var(--space-6); }
@media (max-width: 639.98px) { .panel-actions .button { inline-size: 100%; } }
.steps { padding: 0; list-style: none; counter-reset: step; display: grid; gap: var(--space-6); max-inline-size: 52rem; }
.steps > li { counter-increment: step; display: grid; grid-template-columns: 2rem minmax(0, 1fr); column-gap: var(--space-2); }
.steps > li::before {
  content: counter(step);
  grid-row: 1 / span 3;
  display: grid; place-items: center; inline-size: 2rem; block-size: 2rem;
  border-radius: var(--site-radius); border: 1px solid var(--color-border-strong);
  font-weight: var(--weight-semibold); font-size: 1rem; font-variant-numeric: tabular-nums;
}
.steps h4 { font-size: 1.0625rem; line-height: 2rem; }
.steps p { color: var(--color-text-muted); margin-bottom: var(--space-2); }
@media (max-width: 639.98px) { .steps > li > .code { grid-column: 1 / -1; margin-top: var(--space-1); } }
.note {
  margin-top: var(--space-6); max-inline-size: 52rem;
  padding: var(--space-2) var(--space-4);
  background: var(--color-caution-bg); color: var(--color-caution-text);
  border-left: 2px solid var(--color-caution); border-radius: 0;
}
.note a { color: inherit; font-weight: var(--weight-semibold); }
.note code { background: transparent; padding: 0; }
.note-plain { margin-top: var(--space-6); color: var(--color-text-muted); }

/* Quick start */
.code-lg pre { font-size: 0.9375rem; }

/* Tables: hairline rules, mono numerals in data columns. */
.stack-table { inline-size: 100%; border-collapse: collapse; font-size: 1rem; line-height: 1.5; }
.stack-table caption { text-align: start; font-weight: var(--weight-semibold); padding-bottom: var(--space-2); }
.stack-table th, .stack-table td { text-align: start; vertical-align: top; padding: var(--space-2) var(--space-4) var(--space-2) 0; border-bottom: 1px solid var(--color-border); }
.stack-table thead th { font-size: var(--site-text-small); font-weight: var(--weight-semibold); color: var(--color-text-muted); border-bottom-color: var(--color-border-strong); }
.stack-table tbody th { font-weight: var(--weight-semibold); }
.formats-table tbody th { inline-size: 24%; }
.formats-table td:nth-child(2), .formats-table td:nth-child(3) { white-space: nowrap; }
.compare-table tbody th { inline-size: 34%; }
.cell-note { display: block; font-weight: var(--weight-book); font-size: var(--site-text-small); color: var(--color-text-muted); }
.after-table { margin-top: var(--space-4); color: var(--color-text-muted); max-inline-size: var(--measure); }

@media (max-width: 639.98px) {
  .stack-table thead { position: absolute; inline-size: 1px; block-size: 1px; overflow: hidden; clip: rect(0 0 0 0); }
  .stack-table, .stack-table tbody, .stack-table tr, .stack-table th, .stack-table td { display: block; inline-size: auto; }
  .stack-table tr { padding-block: var(--space-4); border-bottom: 1px solid var(--color-border); }
  .stack-table th, .stack-table td { border: 0; padding: 0; }
  .stack-table tbody th { font-size: var(--site-text-h3); margin-bottom: var(--space-2); }
  .stack-table td { display: grid; grid-template-columns: 8rem minmax(0, 1fr); gap: var(--space-2); padding-block: 2px; }
  .stack-table td::before { content: attr(data-label); color: var(--color-text-muted); font-size: var(--site-text-small); font-weight: var(--weight-semibold); padding-top: 2px; }
  .formats-table td:nth-child(2), .formats-table td:nth-child(3) { white-space: normal; }
  .compare-table td { display: block; }
  .compare-table td::before { content: none; }
}

/* Desktop */
.desktop-copy { max-inline-size: var(--measure); margin: 0; }

/* FAQ */
.faq details { border-top: 1px solid var(--color-border); }
.faq details:last-child { border-bottom: 1px solid var(--color-border); }
.faq summary {
  display: flex; justify-content: space-between; align-items: center; gap: var(--space-4);
  min-block-size: 56px; padding-block: var(--space-2);
  font-weight: var(--weight-semibold); font-size: 1.0625rem; cursor: pointer; list-style: none;
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after {
  content: ""; flex: none; inline-size: 0.5rem; block-size: 0.5rem;
  border-right: 1.5px solid var(--color-text-muted); border-bottom: 1.5px solid var(--color-text-muted);
  transform: translateY(-25%) rotate(45deg);
  transition: transform var(--dur-fast) var(--ease-standard);
}
.faq details[open] summary::after { transform: translateY(25%) rotate(-135deg); }
.faq details p { color: var(--color-text-muted); max-inline-size: var(--measure); padding-bottom: var(--space-2); }

/* Footer */
.footer { border-top: 1px solid var(--color-border); padding-block: var(--space-7); font-size: var(--site-text-small); color: var(--color-text-muted); }
.footer-inner { display: grid; gap: var(--space-4); }
.footer-id { display: flex; align-items: center; gap: var(--space-2); margin: 0; color: var(--color-text); font-weight: var(--weight-semibold); }
.footer-id .mark { fill: var(--color-text-muted); }
.footer-links { list-style: none; padding: 0; display: flex; flex-wrap: wrap; gap: 0 var(--space-5); }
.footer-links a { display: inline-flex; align-items: center; min-block-size: var(--row-height); color: var(--color-text-muted); }
.footer-links a:hover { color: var(--color-accent); }
.footer-note { margin: 0; }

/* ---------- Docs and 404 ---------- */
.doc { padding-block: clamp(2.5rem, 1.5rem + 4vw, 5rem); display: grid; gap: var(--space-7); }
@media (min-width: 960px) { .doc { grid-template-columns: 14rem minmax(0, 1fr); gap: var(--space-8); align-items: start; } }
.doc-toc { font-size: var(--site-text-small); }
@media (min-width: 960px) { .doc-toc { position: sticky; top: calc(64px + var(--space-6)); } }
.doc-toc p { font-weight: var(--weight-semibold); color: var(--color-text); margin-bottom: var(--space-2); }
.doc-toc ul { list-style: none; padding: 0; display: flex; flex-wrap: wrap; gap: 0 var(--space-4); }
@media (min-width: 960px) { .doc-toc ul { display: block; border-left: 1px solid var(--color-border); } .doc-toc li a { padding-inline-start: var(--space-2); } }
.doc-toc a { display: inline-flex; align-items: center; min-block-size: var(--row-height); color: var(--color-text-muted); text-decoration: none; font-weight: var(--weight-semibold); }
.doc-toc a:hover { color: var(--color-accent); text-decoration: underline; }
.doc-body { max-inline-size: 46rem; min-inline-size: 0; }
.doc-body h1 { font-size: clamp(2.125rem, 1.7rem + 2vw, 3rem); margin-bottom: var(--space-4); }
.doc-body h2 { font-size: clamp(1.375rem, 1.25rem + 0.6vw, 1.75rem); margin: var(--space-8) 0 var(--space-3); padding-top: var(--space-5); border-top: 1px solid var(--color-border); }
.doc-body > p, .doc-body li { max-inline-size: var(--measure); }
.doc-body ul { padding-inline-start: var(--space-3); margin-bottom: var(--space-4); }
.doc-body li { margin-bottom: var(--space-2); }
.doc-body .code { margin-block: var(--space-4) var(--space-5); }
.doc-intro { font-size: var(--site-text-lead); line-height: 1.5; color: var(--color-text-muted); }
.doc-meta { font-size: var(--site-text-small); font-weight: var(--weight-book); color: var(--color-text-muted); margin-bottom: var(--space-2); }

.notfound { padding-block: clamp(3rem, 2rem + 8vw, 9rem); display: grid; gap: var(--space-7); align-items: center; }
@media (min-width: 960px) { .notfound { grid-template-columns: 7fr 5fr; } }
.notfound h1 { margin-bottom: var(--space-4); }
.notfound .lead { margin-bottom: var(--space-5); }
.notfound-art { color: var(--color-accent); fill: currentColor; inline-size: 100%; max-inline-size: 420px; block-size: auto; justify-self: center; }

@media (forced-colors: active) {
  .is-folded .strip, .is-folded .strip:nth-child(even) { background: CanvasText; }
  .button.primary, .abtn-primary { border: 1px solid ButtonText; }
  .bar, .bench-row.us .bar, .bar.us { background: CanvasText; }
}
html:not(.js) .fold-caption { display: none; }

/* Reduced motion: no transitions, animations or smooth scrolling. */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    transition-delay: 0ms !important;
    scroll-behavior: auto !important;
  }
}