/* iterframes landing page.
   Colour meanings are fixed across every diagram on the page:
   amber = frames and data, cyan = the decoder thread, magenta = the GPU.

   The page is a light table: the surface is lit and slightly cool, the
   figures are objects resting on it, and the tracks frames run through are
   cut into it. Two shadows carry that, --lift for what sits on the table
   and --well for what is cut into it; nothing else casts one. */

@font-face {
  font-family: "Plus Jakarta Sans";
  src: url("assets/fonts/jakarta-latin.woff2") format("woff2");
  font-weight: 400 800;
  font-display: swap;
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+2000-206F, U+2122, U+2212, U+FFFD;
}

@font-face {
  font-family: "JetBrains Mono";
  src: url("assets/fonts/jetbrains-mono-latin.woff2") format("woff2");
  font-weight: 400 800;
  font-display: swap;
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+2000-206F, U+2122, U+2212, U+FFFD;
}

:root {
  --bg: #f8f2e6;
  --bg-2: #fffdf7;
  --bg-3: #f1e9d9;
  --line: #ded0b6;
  --line-soft: #ebe1cd;
  --line-strong: #c3b192;
  --ink: #1b1813;
  --dim: #5b5145;
  --mute: #7c7163;

  /* Each accent is dark enough to read as text on the paper, and the triple
     behind it makes the washes in the diagrams the same colour. */
  --frame-rgb: 181 88 9;
  --thread-rgb: 11 110 140;
  --gpu-rgb: 158 47 135;
  --ok-rgb: 43 112 52;

  --frame: rgb(var(--frame-rgb));
  --thread: rgb(var(--thread-rgb));
  --gpu: rgb(var(--gpu-rgb));
  --ok: rgb(var(--ok-rgb));
  --frame-glow: rgb(var(--frame-rgb) / .28);

  /* Objects on the paper, and slots cut into it. */
  --lift: 0 1px 2px rgb(60 42 16 / .08), 0 6px 16px -8px rgb(60 42 16 / .22);
  --lift-high: 0 2px 4px rgb(60 42 16 / .09), 0 22px 44px -22px rgb(60 42 16 / .36);
  --well: inset 0 1px 3px rgb(60 42 16 / .14), inset 0 0 0 1px rgb(60 42 16 / .05);

  --mono: "JetBrains Mono", ui-monospace, "SF Mono", SFMono-Regular,
          "Cascadia Mono", Menlo, Consolas, monospace;
  --sans: "Plus Jakarta Sans", system-ui, -apple-system, "Segoe UI", Roboto,
          "Helvetica Neue", Arial, sans-serif;

  --gutter: 124px;
}

* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 17px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  /* Warmer where the page opens, so the paper is not one flat fill. */
  background-image:
    radial-gradient(1100px 620px at 22% -10%, #fffaf0 0%, transparent 66%),
    radial-gradient(760px 420px at 96% 2%, #fdf6e8 0%, transparent 60%);
  background-repeat: no-repeat;
}

a { color: var(--thread); text-decoration-thickness: 1px; text-underline-offset: 3px; }
a:hover { color: #095f7c; }

code, pre { font-family: var(--mono); }

:where(p, li, td, th) code {
  font-size: .88em;
  background: var(--bg-2);
  border: 1px solid var(--line-soft);
  border-radius: 3px;
  padding: .05em .34em;
}

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

.skip {
  position: absolute; left: -9999px;
  background: var(--frame); color: #fff; padding: 10px 16px; z-index: 9;
}
.skip:focus { left: 12px; top: 12px; }

.wrap { max-width: 1080px; margin: 0 auto; padding-inline: 24px; }

/* ---------- top bar ---------- */

.topbar {
  position: sticky; top: 0; z-index: 8;
  border-bottom: 1px solid var(--line-soft);
  background: rgb(255 255 255 / .82);
  backdrop-filter: saturate(1.4) blur(10px);
}
.topbar-in {
  display: flex; align-items: center; justify-content: space-between;
  gap: 20px; padding-block: 16px;
}
.brand {
  display: inline-flex; align-items: center; gap: 9px;
  color: var(--ink); text-decoration: none;
  font-family: var(--mono); font-weight: 700; font-size: 15px; letter-spacing: -.04em;
}
.brand-mark { color: var(--frame); flex: none; }
.topnav { display: flex; gap: 22px; font-family: var(--mono); font-size: 13px; letter-spacing: -.02em; }
.topnav a { color: var(--dim); text-decoration: none; }
.topnav a:hover { color: var(--ink); }

/* ---------- hero ---------- */

.hero { padding-block: clamp(44px, 8vw, 84px) 24px; }

.badge {
  display: inline-flex; align-items: center; gap: 9px;
  margin: 0 0 20px; padding: 7px 14px 7px 12px;
  background: rgb(var(--frame-rgb) / .1);
  border: 1px solid rgb(var(--frame-rgb) / .3); border-radius: 999px;
  font-family: var(--mono); font-size: 12px; font-weight: 600;
  letter-spacing: -.02em; color: var(--frame);
}
.badge::before {
  content: ""; width: 7px; height: 7px; border-radius: 50%;
  background: var(--frame); flex: none;
}

.stats { display: flex; flex-wrap: wrap; gap: 14px 40px; margin: 0 0 52px; }
.stat b {
  display: block; font-family: var(--mono); font-size: 1rem; font-weight: 700;
  letter-spacing: -.04em; color: var(--ink);
}
.stats dt, .stats dd { margin: 0; }
.stat span { display: block; font-size: 12.5px; color: var(--mute); }

.ticker {
  border-block: 1px solid var(--line-soft);
  background: rgb(255 253 247 / .6);
}
.ticker-in {
  display: flex; flex-wrap: wrap; gap: 10px 34px; justify-content: center;
  padding-block: 15px;
  font-family: var(--mono); font-size: 12.5px; letter-spacing: -.02em;
  color: var(--mute);
}

h1 {
  font-weight: 800;
  font-size: clamp(2.1rem, 6.4vw, 4.05rem);
  line-height: 1.05;
  letter-spacing: -.032em;
  word-spacing: .04em;
  overflow-wrap: break-word;
  margin: 0 0 22px;
  text-wrap: balance;
}

.lede {
  max-width: 58ch;
  font-size: clamp(1.06rem, 1.5vw, 1.24rem);
  line-height: 1.58;
  color: var(--dim);
  margin: 0 0 32px;
}

.actions { display: flex; flex-wrap: wrap; gap: 12px; margin-bottom: 28px; }

.copy {
  display: inline-flex; align-items: center; gap: 14px;
  background: linear-gradient(180deg, #c9630b 0%, var(--frame) 56%, #94480a 100%);
  color: #fff;
  border: none; border-radius: 7px;
  padding: 12px 14px 12px 18px;
  font: inherit; cursor: pointer;
  box-shadow:
    inset 0 1px 0 rgb(255 255 255 / .34),
    0 1px 2px rgb(60 42 16 / .18),
    0 10px 22px -12px rgb(150 74 8 / .7);
  transition: transform .12s ease, box-shadow .12s ease, filter .12s ease;
}
.copy code { font-family: var(--mono); font-size: 15px; font-weight: 700; letter-spacing: -.03em; }
.copy-state {
  font-family: var(--mono); font-size: 11.5px; letter-spacing: -.02em;
  background: rgb(255 255 255 / .22);
  border-radius: 3px; padding: 3px 8px; min-width: 52px; text-align: center;
}
.copy:hover { filter: brightness(1.06); }
.copy:active {
  transform: translateY(1px);
  box-shadow:
    inset 0 2px 4px rgb(86 40 4 / .45),
    0 1px 1px rgb(60 42 16 / .16);
}
.copy.big { padding: 15px 18px 15px 22px; }
.copy.big code { font-size: 18px; }

.ghost {
  display: inline-flex; align-items: center;
  background: var(--bg-2);
  border: 1px solid var(--line); border-radius: 7px;
  padding: 12px 18px; color: var(--ink); text-decoration: none;
  font-family: var(--mono); font-size: 13.5px; letter-spacing: -.02em;
  box-shadow: var(--lift);
  transition: transform .12s ease, box-shadow .12s ease;
}
.ghost:hover { transform: translateY(-1px); box-shadow: var(--lift-high); }
.ghost:active { transform: translateY(1px); box-shadow: var(--well); }

/* ---------- the two timelines ---------- */

.trace {
  margin: 0;
  background: var(--bg-2);
  border: 1px solid var(--line-soft);
  border-radius: 12px;
  padding: 24px clamp(16px, 3vw, 30px) 22px;
  box-shadow: var(--lift-high);
}

.trace-head {
  display: flex; flex-wrap: wrap; align-items: center;
  justify-content: space-between; gap: 14px; margin-bottom: 20px;
}
.trace-title {
  font-family: var(--mono); font-size: .95rem; font-weight: 700;
  margin: 0; max-width: none; letter-spacing: -.04em;
}

.replay {
  font-family: var(--mono); font-size: 12.5px; letter-spacing: -.02em;
  color: var(--dim); background: var(--bg-2);
  border: 1px solid var(--line); border-radius: 6px;
  padding: 7px 13px; cursor: pointer;
  box-shadow: var(--lift);
  transition: transform .12s ease, box-shadow .12s ease, color .12s ease;
}
.replay:hover { color: var(--ink); transform: translateY(-1px); box-shadow: var(--lift-high); }
.replay:active { transform: translateY(1px); box-shadow: var(--well); }

.ruler {
  position: relative; height: 20px; margin-bottom: 4px;
  margin-left: var(--gutter);
  font-family: var(--mono); font-size: 11px; color: var(--mute);
}
.ruler span {
  position: absolute; top: 0; left: calc(var(--at) * 100%);
  transform: translateX(-50%); white-space: nowrap;
}
.ruler span::after {
  content: ""; position: absolute; left: 50%; top: 17px;
  width: 1px; height: 6px; background: var(--line);
}
.ruler span:first-child { transform: none; }
.ruler span:first-child::after { left: 0; }

.group { padding-top: 14px; }
.group + .group { margin-top: 26px; border-top: 1px solid var(--line-soft); padding-top: 22px; }

.group-head {
  display: grid; grid-template-columns: minmax(0, 1fr) auto;
  gap: 2px 20px; align-items: start; margin-bottom: 14px;
}
.group-head h3 {
  grid-column: 1; margin: 0;
  font-size: 1rem; font-weight: 600; letter-spacing: -.01em;
}
.group-head p {
  grid-column: 1; margin: 0; max-width: 62ch;
  font-size: 14.5px; color: var(--dim);
}
.group-time {
  grid-column: 2; grid-row: 1 / span 2;
  text-align: right; line-height: 1.2;
}
.group-time b {
  display: block; font-family: var(--mono); font-weight: 600;
  font-size: 1.5rem; letter-spacing: -.03em; color: var(--dim);
  font-variant-numeric: tabular-nums;
}
.group-time small { display: block; font-size: 11.5px; color: var(--mute); }
.group.finished .group-time b { color: var(--ink); }
#group-overlap.finished .group-time b { color: var(--frame); }

.lanes { position: relative; padding-left: var(--gutter); }

.lane { position: relative; height: 32px; margin-bottom: 6px; }
.lane:last-of-type { margin-bottom: 0; }
.lane-film { height: 26px; margin-top: 10px; }
.lane-name {
  position: absolute; left: calc(-1 * var(--gutter)); top: 0; bottom: 0;
  width: calc(var(--gutter) - 16px);
  display: flex; align-items: center; justify-content: flex-end;
  font-size: 13px; color: var(--dim);
}
.track {
  position: absolute; inset: 0;
  background: var(--bg-3); border-radius: 4px;
  box-shadow: var(--well);
}

.blk {
  position: absolute; top: 4px; bottom: 4px;
  left: calc(var(--x) * 100%);
  width: calc(var(--w) * 100%);
  border-radius: 2px; border: 1px solid transparent;
}
.blk.decode { background: rgb(var(--thread-rgb) / .24); border-color: rgb(var(--thread-rgb) / .7); }
.blk.work   { background: rgb(var(--frame-rgb) / .26); border-color: rgb(var(--frame-rgb) / .78); }

/* Each frame sits at the moment the loop received it, so the gaps between
   them are the waiting. */
.strip { position: absolute; inset: 0; }
.thumb {
  position: absolute; top: 0; bottom: 0;
  width: max(4.2%, 16px);
  left: calc(var(--t) * 100%);
  transform: translateX(-100%);
  background-image: url("assets/frames.webp");
  background-size: 1200% 100%;
  background-position: calc(var(--i) * 100% / 11) 0;
  border-radius: 2px;
  box-shadow: 0 0 0 1px rgb(var(--frame-rgb) / .4);
}

.veil {
  /* Two pixels past the lanes, so the ring around a frame that has not
     arrived yet is covered as well. */
  position: absolute; top: -2px; bottom: -2px; right: 0;
  left: calc(var(--gutter) + var(--p, 0) * (100% - var(--gutter)));
  background: var(--bg-2);
  pointer-events: none;
}
.playhead {
  position: absolute; top: 0; bottom: 0; width: 1px;
  left: calc(var(--gutter) + var(--p, 0) * (100% - var(--gutter)));
  background: var(--ink); opacity: .5; pointer-events: none;
}
.group.finished .playhead { opacity: 0; }

.trace-foot { margin: 22px 0 0 var(--gutter); }
.trace-foot p { margin: 0; font-size: 14px; color: var(--dim); max-width: 70ch; }

.note {
  max-width: 70ch; margin: 18px 0 0;
  font-size: 13.5px; line-height: 1.6; color: var(--mute);
}
.note a { color: var(--dim); }

/* ---------- sections ---------- */

.band { padding-block: clamp(56px, 8vw, 92px); border-top: 1px solid var(--line-soft); }

h2 {
  font-size: clamp(1.75rem, 3.4vw, 2.6rem);
  font-weight: 800; letter-spacing: -.038em; line-height: 1.06;
  margin: 0 0 18px; max-width: 22ch; text-wrap: balance;
}
.sub { max-width: 58ch; color: var(--dim); margin: 0 0 34px; }

pre {
  margin: 0; overflow-x: auto;
  background: var(--bg-3); border: none;
  border-radius: 8px; padding: 18px 20px;
  font-size: 13.5px; line-height: 1.75; color: #1d2b26;
  box-shadow: var(--well);
}
pre .k { color: var(--gpu); }
pre .f { color: var(--thread); }
pre .s { color: var(--ok); }
pre .n { color: var(--frame); }
pre .c { color: var(--mute); font-style: italic; }
.inline-code { padding: 12px 14px; font-size: 13px; }

/* ---------- cards ---------- */

.cards {
  display: grid; gap: 18px;
  grid-template-columns: minmax(0, 1fr);
}
@media (min-width: 780px) {
  .cards { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

.card {
  position: relative;
  display: flex; flex-direction: column;
  background: var(--bg-2);
  border: 1px solid var(--line); border-radius: 12px;
  padding: 26px;
  box-shadow: var(--lift);
}
.card::before {
  content: ""; position: absolute; inset: 7px;
  border: 1px dashed rgb(var(--frame-rgb) / .26); border-radius: 7px;
  pointer-events: none;
}
.card h3 {
  margin: 0 0 10px; font-size: 1.05rem;
  font-weight: 800; letter-spacing: -.03em;
}
.card p { margin: 0 0 22px; font-size: 15.5px; color: var(--dim); }
.card pre {
  margin: auto 0 0; border: none;
  border-radius: 8px; background: var(--bg-3);
  box-shadow: inset 0 1px 3px rgb(60 42 16 / .13);
  font-size: 12.5px; padding: 16px 18px;
}

/* ---------- random access ---------- */

.seek { margin: 0; }

.modes { display: flex; gap: 8px; margin-bottom: 22px; flex-wrap: wrap; }
.mode {
  font: inherit; font-size: 12.5px; font-family: var(--mono); letter-spacing: -.02em;
  color: var(--dim); background: var(--bg-2);
  border: 1px solid var(--line); border-radius: 7px;
  padding: 7px 13px; cursor: pointer;
  box-shadow: var(--lift);
  transition: transform .12s ease, box-shadow .12s ease, color .12s ease;
}
.mode:hover { color: var(--ink); transform: translateY(-1px); box-shadow: var(--lift-high); }
.mode.on {
  color: #fff; font-weight: 700;
  background: linear-gradient(180deg, #1490bb 0%, var(--thread) 60%, #0a6483 100%);
  border-color: transparent; transform: none;
  box-shadow:
    inset 0 1px 0 rgb(255 255 255 / .28),
    0 1px 2px rgb(60 42 16 / .16),
    0 10px 20px -12px rgb(6 78 100 / .8);
}

.counters { display: flex; flex-wrap: wrap; gap: 14px 40px; margin-bottom: 28px; }
.counter { display: flex; flex-direction: column; }
.counter-value {
  font-family: var(--mono); font-weight: 800;
  font-size: 2rem; letter-spacing: -.05em; color: var(--ink);
  font-variant-numeric: tabular-nums;
}
.counter[data-kind="decoded"] .counter-value { color: var(--thread); }
.counter-label { font-family: var(--mono); font-size: 11.5px; letter-spacing: -.02em; color: var(--mute); }

/* The frames of the file, in a strip with sprocket holes down both edges. */
.film {
  position: relative; height: 62px;
  background-color: var(--bg-3);
  background-image:
    repeating-linear-gradient(90deg, rgb(60 42 16 / .22) 0 5px, transparent 5px 15px),
    repeating-linear-gradient(90deg, rgb(60 42 16 / .22) 0 5px, transparent 5px 15px);
  background-size: 100% 5px;
  background-position: 7px 5px, 7px calc(100% - 5px);
  background-repeat: repeat-x;
  border: none; border-radius: 6px;
  box-shadow: var(--well);
}
.film-ticks {
  position: absolute; inset: 9px 0; overflow: hidden;
  background-image: linear-gradient(90deg, var(--line) 0 1px, transparent 1px);
  background-size: calc(100% / 159) 100%;
  opacity: .5;
}
.film.indexed .film-ticks {
  opacity: .45;
  background-image: linear-gradient(90deg, var(--thread) 0 1px, transparent 1px);
}
.film-scan {
  position: absolute; top: 0; bottom: 0; width: 2px; left: 0;
  background: var(--thread);
  box-shadow: 0 0 14px 2px rgb(var(--thread-rgb) / .5);
  opacity: 0;
}
.film.indexing .film-scan { opacity: 1; }

.run {
  position: absolute; top: 5px; bottom: 5px;
  left: calc(var(--x) * 100%);
  width: max(calc(var(--w) * 100%), 5px);
  background: rgb(var(--thread-rgb) / .3); border-radius: 1px;
  transform: scaleX(0); transform-origin: left center;
  transition: transform .9s ease;
}
.run.on { transform: scaleX(1); }

.mark {
  position: absolute; top: -2px; bottom: -2px; width: 2px;
  left: calc(var(--x) * 100%);
  background: var(--frame);
  opacity: 0; transition: opacity .4s ease;
}
.mark::after {
  content: attr(data-label);
  position: absolute; top: 100%; left: 50%; transform: translate(-50%, 6px);
  font-family: var(--mono); font-size: 11px; color: var(--frame); white-space: nowrap;
}
.mark.on { opacity: 1; }
.mark.active { box-shadow: 0 0 12px 2px rgb(var(--frame-rgb) / .45); }

.film-axis {
  display: flex; justify-content: space-between; margin-top: 34px;
  font-family: var(--mono); font-size: 11px; color: var(--mute);
}

/* The window around the frame being fetched, where a handful of frames is
   wide enough to see one by one. */
.zoom {
  margin-top: 26px; padding: 18px 20px;
  background: var(--bg-2); border: 1px solid var(--line-soft); border-radius: 12px;
  box-shadow: var(--lift);
}
.zoom-title { margin: 0 0 8px; font-size: 14px; color: var(--dim); min-height: 1.6em; }
.zoom-title b { color: var(--ink); font-family: var(--mono); font-weight: 600; }
.zoom-track { position: relative; padding-top: 20px; }
.zoom-cells { display: flex; gap: 2px; height: 34px; }
.zcell {
  flex: 1; min-width: 0; border-radius: 3px;
  background: var(--bg-3); border: 1px solid var(--line-soft);
  box-shadow: inset 0 1px 2px rgb(60 42 16 / .1);
  transition: background .28s linear, border-color .28s linear;
}
.zcell.kf { background: rgb(var(--thread-rgb) / .55); border-color: var(--thread); }
.zcell.thrown { background: rgb(var(--thread-rgb) / .28); border-color: rgb(var(--thread-rgb) / .5); }
.zcell.kept {
  background: var(--frame); border-color: var(--frame);
  box-shadow: 0 0 0 2px var(--frame-glow);
}
.zcell.asked {
  background: transparent;
  border-color: var(--frame); border-style: dashed;
}
.zoom-jump {
  position: absolute; top: 4px; height: 12px;
  border-top: 1px solid var(--thread);
  border-left: 1px solid var(--thread);
  transform: scaleX(0); transform-origin: right center;
  transition: transform 1.1s ease;
}
.zoom-jump.on { transform: scaleX(1); }
.zoom-jump::before {
  content: ""; position: absolute; left: -1px; top: -1px;
  border: 4px solid transparent; border-right-color: var(--thread);
  transform: translateX(-3px);
}
.zoom-jump span {
  position: absolute; left: 0; top: -18px;
  font-size: 11.5px; color: var(--thread); white-space: nowrap;
}
.zoom-keys {
  display: flex; flex-wrap: wrap; gap: 8px 20px;
  margin-top: 14px; font-size: 12px; color: var(--mute);
}
.key::before {
  content: ""; display: inline-block; width: 10px; height: 10px;
  border-radius: 2px; margin-right: 7px; vertical-align: -1px;
}
.key-kf::before { background: rgb(var(--thread-rgb) / .55); box-shadow: inset 0 0 0 1px var(--thread); }
.key-thrown::before { background: rgb(var(--thread-rgb) / .28); box-shadow: inset 0 0 0 1px rgb(var(--thread-rgb) / .5); }
.key-kept::before { background: var(--frame); }
.key-asked::before { border: 1px dashed var(--frame); }

.steps { list-style: none; padding: 0; margin: 30px 0 0; max-width: 72ch; }
.steps li {
  position: relative; padding-left: 28px; margin-bottom: 14px;
  color: var(--mute); font-size: 15.5px; transition: color .45s ease;
}
.steps li b {
  color: var(--mute); font-family: var(--mono); font-weight: 700;
  font-size: .88em; letter-spacing: -.03em; transition: color .45s ease;
}
.steps li .dot {
  position: absolute; left: 0; top: .56em;
  width: 10px; height: 10px; border-radius: 50%;
  border: 1px solid var(--line); background: var(--bg);
  transition: background .45s ease, border-color .45s ease;
}
.steps li.on { color: var(--dim); }
.steps li.on b { color: var(--ink); }
.steps li.on .dot { background: var(--thread); border-color: var(--thread); }

.catch { display: flex; flex-wrap: wrap; gap: 14px; margin-top: 30px; min-height: 124px; }
.caught {
  margin: 0; width: 200px; opacity: 0; transform: translateY(6px);
  transition: opacity .5s ease, transform .5s ease;
}
.caught.on { opacity: 1; transform: none; }
.caught i {
  display: block; aspect-ratio: 16 / 9; border-radius: 4px;
  background-image: url("assets/scenes.webp");
  background-size: 300% 100%;
  background-position: calc(var(--i) * 100% / 2) 0;
  box-shadow:
    0 0 0 4px var(--bg-2),
    0 0 0 5px var(--line-soft),
    var(--lift);
}
.caught span {
  display: block; margin-top: 16px;
  font-family: var(--mono); font-size: 11.5px; letter-spacing: -.02em; color: var(--dim);
}

.seek-cost {
  margin: 16px 0 0; font-family: var(--mono); font-size: 12.5px;
  color: var(--thread);
}

.seek-foot {
  display: flex; flex-wrap: wrap; align-items: center;
  justify-content: space-between; gap: 14px; margin-top: 30px;
}

/* ---------- hardware paths ---------- */

.paths { margin-bottom: 40px; overflow-x: auto; }
.pathsvg { width: 100%; min-width: 700px; height: auto; display: block; }
.pathsvg .node rect { fill: var(--bg-2); stroke: var(--line); stroke-width: 1; }
.pathsvg .node text {
  fill: var(--ink); font-family: var(--mono); font-size: 11.5px; letter-spacing: -.03em;
  text-anchor: middle; dominant-baseline: middle;
}
.pathsvg .node text.small { fill: var(--mute); font-family: var(--sans); font-size: 11px; letter-spacing: 0; }
.pathsvg .node.cpu rect { stroke: rgb(var(--thread-rgb) / .55); }
.pathsvg .node.gpu rect { stroke: rgb(var(--gpu-rgb) / .55); }
.pathsvg .node.out rect { fill: var(--bg-3); }
.pathsvg .wire { fill: none; stroke-width: 1.4; }
.pathsvg .wire.cpu { stroke: rgb(var(--thread-rgb) / .6); }
.pathsvg .wire.gpu { stroke: rgb(var(--gpu-rgb) / .6); }
.pathsvg .tag { font-family: var(--mono); font-size: 10.5px; text-anchor: middle; }
.pathsvg .tag.cpu { fill: var(--thread); }
.pathsvg .tag.gpu { fill: var(--gpu); }

/* ---------- no copy ---------- */

.split { display: grid; gap: clamp(24px, 4vw, 44px); align-items: start; grid-template-columns: minmax(0, 1fr); }
@media (min-width: 900px) { .split { grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); } }
.split-text p { margin: 0 0 16px; color: var(--dim); max-width: 56ch; }
.split-text p:last-child { margin-bottom: 0; }
.split-diagram { display: flex; align-items: center; }
.memsvg { width: 100%; height: auto; }
.memsvg .cells rect { fill: rgb(var(--frame-rgb) / .24); stroke: rgb(var(--frame-rgb) / .72); }
.memsvg .view { fill: none; stroke: var(--thread); stroke-width: 1.2; stroke-dasharray: 5 4; }
.memsvg text.small { fill: var(--mute); font-family: var(--mono); font-size: 9.5px; }
.memsvg text.view-label { fill: var(--thread); }
.memsvg text.strike { fill: var(--ok); }
.memsvg .leader { fill: none; stroke: var(--thread); stroke-width: 1; opacity: .6; }

/* ---------- comparison ---------- */

.tablewrap {
  overflow-x: auto; background: var(--bg-2);
  border: 1px solid var(--line-soft); border-radius: 12px;
  box-shadow: var(--lift);
}
table { border-collapse: collapse; width: 100%; min-width: 820px; font-size: 14px; }
th, td {
  text-align: left; vertical-align: top;
  padding: 13px 16px; border-bottom: 1px solid var(--line-soft);
}
thead th {
  color: var(--dim); font-family: var(--mono); font-weight: 700;
  font-size: 12px; letter-spacing: -.02em; background: var(--bg-2);
}
thead th.us, td.us { background: rgb(var(--frame-rgb) / .07); }
thead th.us { color: var(--frame); }
tbody th { color: var(--dim); font-weight: 500; width: 13em; }
td { color: var(--dim); }
td.us { color: var(--ink); }
tbody tr:last-child th, tbody tr:last-child td { border-bottom: none; }

/* ---------- closing ---------- */

.closing { padding-block: clamp(60px, 9vw, 104px); border-top: 1px solid var(--line-soft); }
.closing h2 { margin-bottom: 26px; }
.closing .sub { margin: 26px 0 0; }

.site-foot {
  border-top: 1px solid var(--line-soft);
  background: var(--ink); color: #c9d4cd;
}
.site-foot a { color: #e7efe9; }
.site-foot a:hover { color: #fff; }
.foot-in { padding-block: 40px; display: grid; gap: 14px; }
.foot-in p { margin: 0; font-size: 13.5px; color: #9fb0a6; max-width: 72ch; }
.foot-nav {
  display: flex; gap: 22px; margin-top: 8px;
  font-family: var(--mono); font-size: 12.5px; letter-spacing: -.02em;
}
.foot-nav a { color: #cfdcd4; text-decoration: none; }
.foot-nav a:hover { color: #fff; }

/* ---------- narrow screens ---------- */

@media (max-width: 760px) {
  :root { --gutter: 82px; }
  body { font-size: 16px; }
  .lane-name { font-size: 11.5px; }
  .group-head { grid-template-columns: minmax(0, 1fr); }
  .group-time { grid-column: 1; grid-row: auto; text-align: left; margin-top: 6px; }
  .group-time b { font-size: 1.25rem; }
  .trace-foot { margin-left: 0; }
  .counters { gap: 14px 26px; }
  .counter-value { font-size: 1.55rem; }
  .modes { gap: 6px; }
  .copy.big { padding: 13px 14px 13px 16px; }
  .copy.big code { font-size: 15px; }
  .topnav { gap: 14px; font-size: 13.5px; }
  .caught { width: calc(50% - 7px); }
}

@media (prefers-reduced-motion: reduce) {
  * { animation-duration: .001ms !important; transition-duration: .001ms !important; }
}