@font-face { font-family: "Behind The Nineties"; src: url("fonts/BehindTheNineties.woff2") format("woff2"); font-display: swap; }
@font-face { font-family: Poppins; src: url("fonts/Poppins-Regular.woff2") format("woff2"); font-weight: 400; font-display: swap; }
@font-face { font-family: Poppins; src: url("fonts/Poppins-SemiBold.woff2") format("woff2"); font-weight: 600; font-display: swap; }
@font-face { font-family: Gaegu; src: url("fonts/Gaegu-400.woff2") format("woff2"); font-weight: 400; font-display: swap; }
@font-face { font-family: Gaegu; src: url("fonts/Gaegu-700.woff2") format("woff2"); font-weight: 700; font-display: swap; }
@font-face { font-family: "Geist Mono"; src: url("fonts/GeistMono.woff2") format("woff2"); font-display: swap; }

:root {
  --bg: oklch(0.975 0.007 85);
  --surface: oklch(0.993 0.004 85);
  --sunken: oklch(0.945 0.009 85);
  --ink: oklch(0.25 0.012 75);
  --muted: oklch(0.5 0.012 75);
  --faint: oklch(0.72 0.01 75);
  --line: oklch(0.25 0.012 75 / 0.08);
  --line-2: oklch(0.25 0.012 75 / 0.16);
  --hs: 0;
  --blob: 0.9 0.06;
  --pop: 0.72 0.15;
  --tint-bg: 0.96 0.025;
  --tint-ink: 0.48 0.13;
  --tint-line: 0.88 0.05;
  --red: oklch(0.58 0.19 25);
  --ease: cubic-bezier(0.16, 1, 0.3, 1);
  --serif: "Behind The Nineties", Georgia, serif;
  --hand: Gaegu, "Segoe Print", "Bradley Hand", cursive;
  --mono: "Geist Mono", ui-monospace, monospace;
  --sans: Poppins, system-ui, sans-serif;
  --ui: var(--sans);
  --h: 250;
  --wide: min(1280px, 100vw - 32px);
  --gap: clamp(112px, 18vh, 220px);
  --text: min(680px, 100vw - 32px);
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: oklch(0.19 0.014 265); --surface: oklch(0.235 0.016 265); --sunken: oklch(0.165 0.012 265);
    --ink: oklch(0.92 0.012 85); --muted: oklch(0.7 0.014 265); --faint: oklch(0.46 0.014 265);
    --line: oklch(0.92 0.012 85 / 0.08); --line-2: oklch(0.92 0.012 85 / 0.18);
    --hs: 12; --blob: 0.38 0.05; --pop: 0.77 0.115; --tint-bg: 0.26 0.03; --tint-ink: 0.84 0.09; --tint-line: 0.34 0.045;
    --red: oklch(0.72 0.15 22);
    color-scheme: dark;
  }
}
:root[data-theme="dark"] {
  --bg: oklch(0.19 0.014 265); --surface: oklch(0.235 0.016 265); --sunken: oklch(0.165 0.012 265);
  --ink: oklch(0.92 0.012 85); --muted: oklch(0.7 0.014 265); --faint: oklch(0.46 0.014 265);
  --line: oklch(0.92 0.012 85 / 0.08); --line-2: oklch(0.92 0.012 85 / 0.18);
  --hs: 12; --blob: 0.38 0.05; --pop: 0.77 0.115; --tint-bg: 0.26 0.03; --tint-ink: 0.84 0.09; --tint-line: 0.34 0.045;
  --red: oklch(0.72 0.15 22);
  color-scheme: dark;
}

* { box-sizing: border-box; --hue: calc(var(--h) + var(--hs)); }
html { scroll-behavior: smooth; scroll-padding-top: 96px; scrollbar-width: thin; scrollbar-color: var(--line-2) transparent; }
body { margin: 0; background: var(--bg); color: var(--ink); font: 17px/1.8 var(--sans); overflow-wrap: break-word; -webkit-font-smoothing: antialiased; transition: background-color 0.4s var(--ease), color 0.4s var(--ease); }
a { color: inherit; text-underline-offset: 4px; }
button, input, select { font: inherit; color: inherit; }
:focus-visible { outline: 2px solid oklch(var(--tint-ink) var(--hue)); outline-offset: 4px; border-radius: 4px; }
::selection { background: oklch(var(--blob) var(--hue)); color: var(--ink); }
.sr-only { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }
.filter-root { position: absolute; width: 0; height: 0; overflow: hidden; }
.skip { position: absolute; left: 16px; top: -60px; z-index: 60; background: var(--ink); color: var(--bg); padding: 8px 14px; border-radius: 6px; font: 14px var(--ui); }
.skip:focus { top: 16px; }

.progress { position: fixed; inset: 0 0 auto 0; height: 2px; z-index: 40; transform-origin: left; background: oklch(var(--pop) var(--hue)); scale: 0 1; }
@supports (animation-timeline: scroll()) {
  .progress { animation: grow linear both; animation-timeline: scroll(root); }
}
@keyframes grow { to { scale: 1 1; } }

.topbar { position: sticky; top: 0; z-index: 30; display: flex; align-items: center; gap: 8px; height: 68px; padding: 0 max(16px, 4vw); background: color-mix(in oklab, var(--bg) 82%, transparent); backdrop-filter: blur(14px); font-family: var(--ui); }
.crumbs { display: flex; align-items: baseline; gap: 10px; margin-right: auto; min-width: 0; overflow: hidden; }
.crumbs a { flex-shrink: 0; font: 12px var(--mono); letter-spacing: 0.08em; color: var(--muted); text-decoration: none; white-space: nowrap; }
.crumbs a:hover { color: var(--ink); }
.crumbs a + a::before { content: "/"; margin-right: 10px; color: var(--muted); }
.crumbs a:last-child { flex-shrink: 1; min-width: 0; overflow: hidden; text-overflow: ellipsis; font: 24px/1.2 var(--serif); letter-spacing: 0; color: var(--ink); }
.brand { font: 24px/1 var(--serif); text-decoration: none; white-space: nowrap; }
.brand small { font: 11px var(--mono); letter-spacing: 0.08em; color: var(--muted); margin-left: 10px; font-style: normal; }
.icon-btn { display: inline-grid; place-items: center; width: 40px; height: 40px; border: 0; border-radius: 50%; background: transparent; color: var(--muted); cursor: pointer; transition: background-color 0.2s, color 0.2s; }
.icon-btn:hover { background: var(--line); color: var(--ink); }
.icon-btn svg { width: 19px; height: 19px; fill: none; stroke: currentColor; stroke-width: 1.6; stroke-linecap: round; stroke-linejoin: round; }
.icon-btn .moon, :root[data-theme="dark"] .icon-btn .sun { display: none; }
:root[data-theme="dark"] .icon-btn .moon { display: block; }
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) .icon-btn .sun { display: none; }
  :root:not([data-theme="light"]) .icon-btn .moon { display: block; }
}
#still[aria-pressed="true"] { color: oklch(var(--tint-ink) var(--hue)); }
.menu-btn { display: inline-flex; align-items: center; gap: 10px; height: 40px; padding: 0 16px; border: 0; border-radius: 999px; background: var(--line); cursor: pointer; font-size: 14px; transition: background-color 0.2s; }
.menu-btn:hover { background: var(--line-2); }
.menu-btn span { font: 12px var(--mono); color: var(--muted); }
.menu-btn b { font-weight: 400; }

.contents { width: 100vw; max-width: none; height: 100dvh; max-height: none; margin: 0; padding: 0; border: 0; background: var(--bg); color: var(--ink); }
.contents::backdrop { background: transparent; }
.contents[open] { animation: sheet 0.45s var(--ease) both; }
@keyframes sheet { from { opacity: 0; translate: 0 16px; } }
.contents-in { width: var(--wide); margin: 0 auto; padding: 24px 0 80px; }
.contents-top { display: flex; align-items: center; justify-content: space-between; height: 44px; margin-bottom: clamp(32px, 8vh, 96px); font-family: var(--ui); }
.contents-top p { margin: 0; font: 26px var(--serif); }
.contents ol { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: repeat(auto-fill, minmax(min(100%, 340px), 1fr)); gap: 4px 48px; }
.contents li a { display: grid; grid-template-columns: 44px 1fr; align-items: baseline; padding: 14px 0; text-decoration: none; border-bottom: 1px solid var(--line); transition: padding 0.3s var(--ease); }
.contents li a:hover { padding-left: 8px; }
.contents li small { font: 12px var(--mono); color: var(--muted); }
.contents li b { font: clamp(24px, 3vw, 30px)/1.2 var(--serif); }
.contents li i { grid-column: 2; font-style: normal; font-size: 16px; color: var(--muted); }
.contents li a[aria-current="page"] b { color: oklch(var(--tint-ink) var(--hue)); }
.contents li a[aria-current="page"] small::before { content: "● "; color: oklch(var(--pop) var(--hue)); }

main { width: var(--wide); margin: 0 auto; padding: 0 0 var(--gap); }
main > :not(.fig, .edges, .cards, .pair, .wide) { width: var(--text); margin-left: auto; margin-right: auto; }
.hero { display: grid; place-items: center; min-height: calc(100svh - 68px); padding: clamp(48px, 10vh, 120px) 0; text-align: center; width: auto !important; }
.hero > div > * { animation: rise 1.4s var(--ease) both; }
.hero h1 { animation-delay: 0.12s; }
.hero .lede { animation-delay: 0.3s; }
.kicker { font: 12px var(--mono); letter-spacing: 0.28em; text-transform: uppercase; color: var(--muted); margin: 0 0 clamp(32px, 6vh, 56px); }
h1 { font: 400 clamp(42px, 11vw, 168px)/1.02 var(--serif); letter-spacing: -0.02em; hyphens: auto; margin: 0 auto; max-width: 14ch; text-wrap: balance; }
h1 span { color: oklch(var(--tint-ink) var(--hue)); }
.lede { max-width: 34ch; margin: clamp(36px, 6vh, 64px) auto 0; font-size: clamp(18px, 1.9vw, 22px); line-height: 1.6; color: var(--muted); text-wrap: balance; }

h2 { font: 400 clamp(34px, 6vw, 76px)/1.08 var(--serif); hyphens: auto; letter-spacing: -0.01em; margin-top: calc(var(--gap) * 1.2); margin-bottom: 0; text-align: center; text-wrap: balance; }
h2 + p { color: var(--muted); text-align: center; margin-top: 16px; }

.fig { position: relative; margin: var(--gap) 0 0; padding: 0; }
.fig-head { text-align: center; margin-bottom: clamp(28px, 5vh, 56px); }
.fig h3 { font: 400 clamp(24px, 2.6vw, 32px)/1.2 var(--serif); line-height: 1.2; margin: 0; color: var(--muted); }
.fig > p { width: var(--text); margin: 0 auto 24px; text-align: center; color: var(--muted); }
.art { position: relative; }
.art svg { display: block; width: 100%; height: auto; overflow: visible; }
.fig figcaption { text-align: center; color: var(--muted); margin-top: 20px; }
.pair { display: grid; grid-template-columns: 1fr 1fr; gap: 0 clamp(32px, 6vw, 96px); }

.ctl { display: flex; flex-wrap: wrap; justify-content: center; align-items: center; gap: 14px 28px; margin-top: clamp(20px, 3vh, 36px); font: 14px var(--ui); color: var(--muted); }
.ctl label { display: inline-flex; align-items: center; gap: 12px; }
.ctl output, .ctl .read { font: 12px var(--mono); color: var(--ink); min-width: 3ch; }
.ctl .note { font-size: 15px; }
.ctl input[type="text"] { padding: 9px 14px; width: min(280px, 70vw); border: 0; border-radius: 999px; background: var(--line); font: 14px var(--mono); }
.ctl select { padding: 8px 12px; border: 0; border-radius: 999px; background: var(--line); }
input[type="range"] { -webkit-appearance: none; appearance: none; width: min(180px, 42vw); height: 20px; background: transparent; cursor: pointer; }
input[type="range"]::-webkit-slider-runnable-track { height: 2px; background: var(--line-2); border-radius: 2px; }
input[type="range"]::-moz-range-track { height: 2px; background: var(--line-2); border-radius: 2px; }
input[type="range"]::-webkit-slider-thumb { -webkit-appearance: none; width: 16px; height: 16px; margin-top: -7px; border-radius: 50%; background: oklch(var(--pop) var(--hue)); border: 3px solid var(--bg); box-shadow: 0 0 0 1px var(--line-2); }
input[type="range"]::-moz-range-thumb { width: 12px; height: 12px; border-radius: 50%; background: oklch(var(--pop) var(--hue)); border: 3px solid var(--bg); box-shadow: 0 0 0 1px var(--line-2); }
.player { display: inline-flex; align-items: center; gap: 6px; flex-wrap: wrap; justify-content: center; }
.player .read { min-width: 8ch; text-align: center; color: var(--muted); }

.btn { cursor: pointer; display: inline-flex; align-items: center; justify-content: center; gap: 6px; min-height: 36px; min-width: 36px; padding: 0 16px; border: 0; border-radius: 999px; background: var(--line); font: 14px var(--ui); color: var(--ink); transition: background-color 0.2s, scale 0.15s var(--ease); }
.btn:hover { background: var(--line-2); }
.btn:active { scale: 0.95; }
.btn.ghost { background: transparent; color: var(--muted); padding: 0 12px; }
.btn.ghost:hover { background: var(--line); color: var(--ink); }
.btn.solid { background: var(--ink); color: var(--bg); }
.btn[aria-pressed="true"] { background: oklch(var(--pop) var(--hue)); color: oklch(0.2 0.02 var(--hue)); }
.btn:disabled { opacity: 0.3; cursor: default; }

.formula { width: auto !important; margin: clamp(48px, 8vh, 96px) auto 0; font: clamp(16px, 2.4vw, 26px)/1.4 var(--mono); text-align: center; overflow-x: auto; white-space: nowrap; color: var(--ink); }
.fig .formula { margin: 28px 0 0; font-size: clamp(14px, 1.8vw, 19px); }
.formula em { font-style: normal; color: oklch(var(--tint-ink) var(--hue)); }

.edges { display: grid; grid-template-columns: repeat(auto-fill, minmax(min(100%, 260px), 1fr)); gap: clamp(48px, 7vh, 80px) clamp(32px, 4vw, 64px); margin: clamp(56px, 9vh, 104px) 0 0; }
.edge .art { margin-bottom: 18px; }
.edge h4 { font: 400 25px/1.25 var(--serif); margin: 0 0 6px; }
.edge p { margin: 0; font-size: 16px; color: var(--muted); }
.edge .fix { display: block; font-size: 16px; line-height: 1.4; color: var(--muted); }

.pager { display: grid; grid-template-columns: 1fr 1fr; gap: 32px; width: var(--wide); margin: 0 auto; padding: clamp(64px, 12vh, 140px) 0 var(--gap); border-top: 1px solid var(--line); }
.pager a { display: block; text-decoration: none; }
.pager small { display: block; font: 12px var(--mono); letter-spacing: 0.08em; color: var(--muted); text-transform: uppercase; margin-bottom: 10px; }
.pager span { font: clamp(26px, 3.8vw, 52px)/1.12 var(--serif); transition: color 0.2s; }
.pager a:hover span { color: oklch(var(--tint-ink) var(--hue)); }
.pager .next { text-align: right; grid-column: 2; }

.cards { display: flex; flex-direction: column; width: min(1040px, 100%); margin: clamp(72px, 12vh, 140px) auto 0; }
.card { display: grid; grid-template-columns: clamp(120px, 24vw, 280px) 1fr; grid-template-rows: auto auto 1fr; column-gap: clamp(28px, 6vw, 88px); align-items: start; padding: clamp(36px, 6vh, 64px) 0; text-decoration: none; border-top: 1px solid var(--line); }
.card:last-child { border-bottom: 1px solid var(--line); }
.card .art { grid-row: 1 / 4; align-self: center; transition: translate 0.5s var(--ease); }
.card:hover .art { translate: 8px 0; }
.card small { align-self: end; font: 11px var(--mono); letter-spacing: 0.18em; text-transform: uppercase; color: var(--muted); }
.card strong { display: block; font: 400 clamp(26px, 3.6vw, 48px)/1.12 var(--serif); margin: 12px 0 10px; transition: color 0.2s, translate 0.5s var(--ease); }
.card:hover strong { color: oklch(var(--tint-ink) var(--hue)); translate: 6px 0; }
.card span { font-size: 15px; color: var(--muted); max-width: 44ch; }

.checklist { list-style: none; display: grid; grid-template-columns: repeat(auto-fill, minmax(min(100%, 380px), 1fr)); gap: 0 clamp(32px, 5vw, 80px); width: min(1040px, 100%); margin: 0 auto; padding: 0; }
.checklist li { border-top: 1px solid var(--line); }
.checklist label { display: grid; grid-template-columns: 40px 1fr; align-items: center; column-gap: 18px; padding: 20px 0; cursor: pointer; }
.checklist svg { grid-row: 1 / 3; width: 40px; height: 40px; overflow: visible; transition: scale 0.3s var(--ease); }
.checklist label:hover svg { scale: 1.08; }
.checklist b { font-weight: 400; font-size: 18px; line-height: 1.35; transition: color 0.3s; }
.checklist small { font: 12px var(--mono); color: var(--muted); overflow-wrap: anywhere; }
.checklist .tick { fill: none; stroke: oklch(var(--pop) var(--hue)); stroke-width: 3.2; stroke-linecap: round; stroke-linejoin: round; stroke-dasharray: 1; stroke-dashoffset: 1; transition: stroke-dashoffset 0.45s var(--ease); }
.checklist .on .tick { stroke-dashoffset: 0; }
.checklist .on b { color: oklch(var(--tint-ink) var(--hue)); }
.checklist input:focus-visible + svg { outline: 2px solid oklch(var(--tint-ink) var(--hue)); outline-offset: 2px; border-radius: 6px; }
.checklist-meter { display: grid; grid-template-columns: 1fr auto; align-items: baseline; gap: 14px 24px; width: min(1040px, 100%); margin: clamp(36px, 6vh, 64px) auto 0; }
.checklist-meter .bar { grid-column: 1 / -1; height: 10px; border-radius: 999px; background: var(--line); overflow: hidden; }
.checklist-meter .bar i { display: block; height: 100%; width: calc(var(--p) * 100%); border-radius: inherit; background: oklch(var(--pop) var(--hue)); transition: width 0.6s var(--ease); }
.checklist-meter b { font: 400 clamp(26px, 3vw, 36px)/1 var(--serif); }
.checklist-meter small { font: 12px var(--mono); letter-spacing: 0.12em; text-transform: uppercase; color: var(--muted); }
.all .checklist-meter small { color: oklch(var(--tint-ink) var(--hue)); }

.stamp { display: inline-block; font: 12px var(--mono); letter-spacing: 0.14em; text-transform: uppercase; color: var(--red); border: 2px solid currentColor; padding: 3px 9px; rotate: -9deg; }
.stamp.slam { animation: stamp 0.5s cubic-bezier(0.3, 1.6, 0.5, 1) both; }
@keyframes stamp { from { scale: 2.2; rotate: -20deg; opacity: 0; } }

.sk-paper { fill: var(--surface); }
.sk-accent { fill: oklch(var(--pop) var(--hue)); }
.sk-cell { fill: oklch(var(--pop) var(--hue) / var(--a, 1)); }
.sk-neg { fill: color-mix(in oklab, var(--ink) calc(var(--a, 1) * 55%), transparent); }
.sk-zone { fill: oklch(var(--pop) var(--hue) / 0.18); }
.sk-red-zone { fill: color-mix(in oklab, var(--red) 18%, transparent); }
.sk-sunk { fill: var(--sunken); }
.sk-inkfill { fill: var(--ink); }
.sk-ink { fill: none; stroke: var(--ink); stroke-width: 2; stroke-linecap: round; stroke-linejoin: round; stroke-dasharray: 1; }
.sk-thin { fill: none; stroke: var(--ink); stroke-width: 1.4; stroke-linecap: round; stroke-linejoin: round; opacity: 0.4; }
.sk-dash { fill: none; stroke: var(--ink); stroke-width: 1.4; stroke-linecap: round; stroke-dasharray: 4 6; opacity: 0.5; }
.sk-pop { fill: none; stroke: oklch(var(--pop) var(--hue)); stroke-width: 3; stroke-linecap: round; stroke-linejoin: round; stroke-dasharray: 1; }
.sk-red { fill: none; stroke: var(--red); stroke-width: 2.6; stroke-linecap: round; stroke-linejoin: round; stroke-dasharray: 1; }
.sk-plot { fill: none; stroke: var(--ink); stroke-width: 2; stroke-linecap: round; stroke-linejoin: round; }
.sk-plot.pop { stroke: oklch(var(--pop) var(--hue)); stroke-width: 3; }
.sk-plot.faint { opacity: 0.35; }
.sk-plot.dash { stroke-dasharray: 6 6; }
.sk-t { fill: var(--ink); }
.sk-t.muted { fill: var(--muted); }
.sk-t.tint { fill: oklch(var(--tint-ink) var(--hue)); }
.sk-t.redt { fill: var(--red); }
.sk-hand { font-family: var(--hand); }
.sk-mono { font-family: var(--mono); white-space: pre; }
.sk-serif { font-family: var(--serif); }
.sk-b { font-weight: 700; }
.sk-mover { stroke: var(--bg); stroke-width: 2; }
.sk-hit { fill: transparent; cursor: pointer; }
.sk-hit:hover + .sk-hl, .sk-hit:focus-visible + .sk-hl { opacity: 1; }
.sk-hl { opacity: 0; pointer-events: none; }
svg [tabindex]:focus-visible { outline: 2px solid oklch(var(--tint-ink) var(--hue)); }

.bob { animation: bob 0.9s ease-in-out infinite alternate; }
.rock { animation: rock 2.6s ease-in-out infinite alternate; transform-box: fill-box; transform-origin: center bottom; }
.spin { animation: spin 6s linear infinite; }
.pulse { animation: pulse 1.6s ease-in-out infinite; transform-box: fill-box; transform-origin: center; }
.blink { animation: blink 1.1s steps(2) infinite; }
.slide-in { animation: slide 0.5s var(--ease) both; }
.pop-in { animation: popin 0.45s cubic-bezier(0.3, 1.6, 0.5, 1) both; transform-box: fill-box; transform-origin: center; }
@keyframes bob { to { translate: 0 -4px; } }
@keyframes rock { from { rotate: -3deg; } to { rotate: 3deg; } }
@keyframes spin { to { rotate: 360deg; } }
@keyframes pulse { 50% { scale: 1.12; } }
@keyframes blink { 50% { opacity: 0; } }
@keyframes slide { from { opacity: 0; translate: -10px 0; } }
@keyframes popin { from { scale: 0.4; opacity: 0; } }
@keyframes ink { from { stroke-dashoffset: 1; } }
@keyframes fade-in { from { opacity: 0; } }
@keyframes rise { from { opacity: 0; translate: 0 24px; } }

@media (prefers-reduced-motion: no-preference) {
  @supports (animation-timeline: view()) {
    .fig .sk-ink, .edge .sk-ink, .card .sk-ink, .fig .sk-pop { animation: ink linear both; animation-timeline: view(); animation-range: entry 5% cover 35%; }
    .fig, .edge, .card, h2 { animation: rise linear both; animation-timeline: view(); animation-range: entry 0% entry 40%; }
  }
  @media (hover: hover) {
    .redraw:is(:hover, :focus-within) .sk-ink { animation: ink 1s var(--ease) calc(0.12s + var(--k) * 45ms) both; }
    .redraw:is(:hover, :focus-within) .sk-t { animation: fade-in 0.5s 0.5s both; }
  }
}
html.still *, html.still *::before, html.still *::after { animation-play-state: paused !important; }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation: none !important; transition: none !important; }
}

@media (max-width: 760px) {
  body { font-size: 16px; }
  .topbar { height: 60px; gap: 4px; }
  .brand small, .menu-btn .lbl, .crumbs a:first-child:nth-last-child(3) { display: none; }
  .crumbs a:last-child { font-size: 20px; }
  .crumbs a:nth-child(2):nth-last-child(2)::before { content: none; }
  .menu-btn { padding: 0 12px; }
  :root { --gap: 72px; }
  .hero { min-height: 0; padding: 56px 0 8px; }
  .hero > div > * { animation-duration: 0.6s; }
  h1 { font-size: clamp(40px, 13vw, 64px); }
  .kicker { margin-bottom: 20px; }
  .lede { margin-top: 24px; }
  h2 { margin-top: var(--gap); }
  .fig-head { margin-bottom: 20px; }
  .formula, .fig .formula { white-space: normal; overflow-x: visible; }
  .ctl { gap: 12px 18px; }
  .checklist b { font-size: 16px; }
  .pair { grid-template-columns: 1fr; }
  .card { grid-template-columns: 96px 1fr; column-gap: 20px; }
  .pager { grid-template-columns: 1fr; }
  .pager .next { grid-column: 1; text-align: left; }
}