:root {
  --ink: #f1f0e8;
  --ink-soft: #a8aa9f;
  --paper: #151712;
  --paper-2: #1b1e18;
  --paper-3: #25291f;
  --line: rgba(241, 240, 232, 0.16);
  --accent: #d5ff43;
  --accent-ink: #14160f;
  --warm: #ff8d6b;
  --blue: #83b7ff;
  --radius: 1.35rem;
  --max: 1180px;
  --ease: cubic-bezier(.22, 1, .36, 1);
}

html[data-theme="light"] {
  --ink: #171912;
  --ink-soft: #5d6255;
  --paper: #f2f0e7;
  --paper-2: #e8e7dc;
  --paper-3: #dcdfd1;
  --line: rgba(23, 25, 18, 0.17);
  --accent: #385d00;
  --accent-ink: #f6f7ed;
  --warm: #a63216;
  --blue: #155f9a;
}

* { box-sizing: border-box; }
html { color-scheme: dark; scroll-behavior: smooth; }
html[data-theme="light"] { color-scheme: light; }
[id] { scroll-margin-top: 6rem; }
body {
  margin: 0;
  color: var(--ink);
  background:
    radial-gradient(circle at 82% 8%, color-mix(in srgb, var(--accent) 11%, transparent), transparent 27rem),
    var(--paper);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 16px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}

::selection { background: var(--accent); color: var(--accent-ink); }
a { color: inherit; }
button, input { font: inherit; }
button, a { -webkit-tap-highlight-color: transparent; }
:focus-visible { outline: 3px solid var(--accent); outline-offset: 4px; }

.skip-link { position: fixed; left: 1rem; top: -5rem; z-index: 100; padding: .8rem 1rem; background: var(--accent); color: var(--accent-ink); border-radius: .5rem; font-weight: 750; }
.skip-link:focus { top: 1rem; }
.reading-progress { position: fixed; inset: 0 0 auto; height: 3px; z-index: 90; background: transparent; }
.reading-progress span { display: block; width: 100%; height: 100%; background: var(--accent); transform: scaleX(0); transform-origin: left center; will-change: transform; }

.site-header { position: sticky; top: 0; z-index: 50; min-height: 72px; padding: 0 max(1.2rem, calc((100vw - var(--max)) / 2)); display: grid; grid-template-columns: 1fr auto 1fr; align-items: center; gap: 2rem; border-bottom: 1px solid var(--line); background: color-mix(in srgb, var(--paper) 82%, transparent); backdrop-filter: blur(18px); }
.brand { display: flex; align-items: center; gap: .75rem; text-decoration: none; font-size: .82rem; font-weight: 750; letter-spacing: .02em; text-transform: uppercase; }
.brand-mark { display: grid; place-items: center; width: 2.4rem; height: 2.4rem; border: 1px solid var(--line); border-radius: 50%; color: var(--accent); font-size: .66rem; }
.site-header nav { display: flex; gap: 1.6rem; }
.site-header nav a { min-height: 44px; display: inline-flex; align-items: center; text-decoration: none; color: var(--ink-soft); font-size: .85rem; }
.site-header nav a:hover { color: var(--ink); }
.header-actions { justify-self: end; display: flex; gap: .45rem; }
.icon-button { width: 44px; height: 44px; border: 1px solid var(--line); border-radius: 50%; color: var(--ink); background: transparent; cursor: pointer; transition: background .25s, color .25s, transform .25s; }
.icon-button:hover { background: var(--accent); color: var(--accent-ink); transform: translateY(-2px); }

.section-shell { width: min(calc(100% - 2.4rem), var(--max)); margin-inline: auto; display: grid; grid-template-columns: 72px 1fr; gap: 2rem; }
.hero > *, .section-shell > *, .atlas-heading > *, .lab-heading > *, .roadmap-heading > * { min-width: 0; }
.section-number { font: 700 .76rem/1 ui-monospace, SFMono-Regular, Menlo, monospace; color: var(--ink-soft); padding-top: .45rem; }
.eyebrow { display: flex; flex-wrap: wrap; align-items: center; gap: .6rem; margin: 0 0 1.1rem; color: var(--ink-soft); text-transform: uppercase; letter-spacing: .15em; font: 720 .71rem/1.2 ui-monospace, SFMono-Regular, Menlo, monospace; }
.eyebrow span { width: 1.7rem; height: 1px; background: var(--accent); }
h1, h2, h3, p { margin-top: 0; }
h1, h2 { letter-spacing: -.055em; line-height: .98; }
h1 { margin-bottom: 1.6rem; font-size: clamp(3.2rem, 7.2vw, 7.1rem); max-width: 11ch; }
h2 { margin-bottom: 1.5rem; font-size: clamp(2.45rem, 5vw, 5.1rem); max-width: 13ch; }
h1 em, h2 em { color: var(--accent); font-family: Georgia, "Times New Roman", serif; font-weight: 400; }
h3 { font-size: 1.15rem; letter-spacing: -.02em; line-height: 1.2; }
.section-intro { max-width: 62ch; color: var(--ink-soft); font-size: 1.04rem; }

.hero { min-height: calc(100vh - 72px); width: min(calc(100% - 2.4rem), var(--max)); margin-inline: auto; padding: clamp(4.5rem, 9vh, 8rem) 0 5rem; display: grid; grid-template-columns: 1.25fr .75fr; align-items: center; gap: 2rem; }
.hero-lede { max-width: 59ch; color: var(--ink-soft); font-size: clamp(1.05rem, 1.5vw, 1.25rem); }
.hero-actions { display: flex; flex-wrap: wrap; gap: .8rem; margin-top: 2rem; }
.button { min-height: 46px; display: inline-flex; align-items: center; justify-content: center; gap: .7rem; padding: .75rem 1.1rem; border: 1px solid var(--line); border-radius: 999px; color: var(--ink); background: transparent; text-decoration: none; font-weight: 720; font-size: .84rem; cursor: pointer; transition: transform .25s var(--ease), background .25s, color .25s; }
.button:hover { transform: translateY(-2px); }
.button-primary { background: var(--accent); color: var(--accent-ink); border-color: transparent; }
.button-quiet:hover { background: var(--paper-3); }
.hero-stats { display: flex; gap: clamp(1.5rem, 4vw, 3.2rem); margin: 4rem 0 0; }
.hero-stats div { display: grid; }
.hero-stats dt { font: 500 2.2rem/1 Georgia, serif; color: var(--accent); }
.hero-stats dd { margin: .45rem 0 0; color: var(--ink-soft); font-size: .76rem; }
.hero-visual { position: relative; min-height: 520px; display: grid; place-items: center; }
.skill-constellation { position: relative; width: min(100%, 440px); aspect-ratio: 1; border: 1px solid var(--line); border-radius: 50%; }
.skill-constellation::before, .skill-constellation::after { content: ""; position: absolute; inset: 16%; border: 1px dashed var(--line); border-radius: 50%; }
.skill-constellation::after { inset: 34%; border-style: solid; }
.core { position: absolute; inset: 50% auto auto 50%; translate: -50% -50%; z-index: 2; display: grid; place-items: center; width: 112px; aspect-ratio: 1; border-radius: 50%; color: var(--accent-ink); background: var(--accent); text-align: center; text-transform: uppercase; letter-spacing: .08em; font: 720 .68rem/1.25 ui-monospace, monospace; box-shadow: 0 0 50px color-mix(in srgb, var(--accent) 30%, transparent); }
.node { position: absolute; padding: .45rem .65rem; border: 1px solid var(--line); border-radius: 999px; background: var(--paper); color: var(--ink-soft); font: 650 .68rem/1 ui-monospace, monospace; transition: color .25s, border-color .25s, transform .6s var(--ease); }
.hero-visual:hover .node { color: var(--ink); border-color: color-mix(in srgb, var(--accent) 55%, var(--line)); }
.n1 { top: 7%; left: 43%; }.n2 { top: 23%; right: 0; }.n3 { top: 57%; right: -4%; }.n4 { bottom: 7%; right: 20%; }.n5 { bottom: 7%; left: 18%; }.n6 { top: 58%; left: -4%; }.n7 { top: 24%; left: -3%; }.n8 { bottom: 16%; left: 43%; }
.hero-visual:hover .n1 { transform: translateY(-7px); }.hero-visual:hover .n3 { transform: translateX(7px); }.hero-visual:hover .n5 { transform: translateY(7px); }.hero-visual:hover .n7 { transform: translateX(-7px); }
.visual-note { position: absolute; right: 0; bottom: 0; color: var(--ink-soft); font: .72rem/1.6 ui-monospace, monospace; }

.thesis, .method, .connections, .signals, .bookmarks, .matrix, .checklist, .sources { padding-block: clamp(5rem, 11vw, 10rem); border-top: 1px solid var(--line); }
.thesis-grid { display: grid; grid-template-columns: 1fr 1fr; gap: clamp(2rem, 8vw, 7rem); align-items: start; margin-top: 4rem; }
.lead-quote { font: 400 clamp(1.75rem, 3.2vw, 3.1rem)/1.12 Georgia, serif; letter-spacing: -.035em; }
.thesis-copy { color: var(--ink-soft); font-size: 1.07rem; }
.thesis-copy mark { padding: .1em .25em; color: var(--accent-ink); background: var(--accent); }
.thesis-copy s { text-decoration-color: var(--warm); }

.method-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1px; margin-top: 4rem; background: var(--line); border: 1px solid var(--line); }
.method-grid article { min-height: 280px; padding: 1.5rem; display: flex; flex-direction: column; background: var(--paper); }
.method-index { margin-bottom: auto; color: var(--accent); font: 600 1.4rem/1 Georgia, serif; }
.method-grid p { color: var(--ink-soft); font-size: .9rem; }
.method-grid small { margin-top: 1rem; color: var(--ink-soft); text-transform: uppercase; letter-spacing: .1em; font-size: .64rem; }
.method-note { margin-top: 1rem; padding: 1rem 1.2rem; border-left: 3px solid var(--accent); background: var(--paper-2); color: var(--ink-soft); font-size: .86rem; }
.method-note strong { color: var(--ink); }

.atlas { padding-block: clamp(5rem, 10vw, 9rem); border-top: 1px solid var(--line); background: var(--paper-2); }
.filter-bar { position: sticky; top: 84px; z-index: 20; width: min(calc(100% - 2.4rem), calc(var(--max) - 104px)); margin: 3rem auto 1.2rem; padding: .55rem; display: flex; gap: .35rem; overflow-x: auto; border: 1px solid var(--line); border-radius: 999px; background: color-mix(in srgb, var(--paper-2) 88%, transparent); backdrop-filter: blur(16px); }
.filter { min-height: 40px; flex: 1 0 auto; padding: .55rem 1rem; border: 0; border-radius: 999px; background: transparent; color: var(--ink-soft); cursor: pointer; }
.filter:hover, .filter.is-active { background: var(--accent); color: var(--accent-ink); }
.filter:focus-visible { outline-offset: -2px; }
.filter-status { width: min(calc(100% - 2.4rem), calc(var(--max) - 104px)); margin: 0 auto .8rem; color: var(--ink-soft); text-align: right; font: .68rem/1.3 ui-monospace, monospace; }
.skill-grid { width: min(calc(100% - 2.4rem), calc(var(--max) - 104px)); margin-inline: auto; display: grid; grid-template-columns: repeat(3, 1fr); gap: 1px; border: 1px solid var(--line); background: var(--line); }
.skill-card { position: relative; min-height: 365px; padding: 1.45rem; display: flex; flex-direction: column; background: var(--paper-2); transition: background .3s, transform .4s var(--ease), opacity .25s; }
.skill-card:hover { z-index: 2; background: var(--paper-3); transform: translateY(-5px); }
.skill-card[hidden] { display: none; }
.card-no { color: var(--ink-soft); font: .65rem/1 ui-monospace, monospace; }
.card-icon { margin: 2rem 0 1.5rem; color: var(--accent); font: 400 2rem/1 Georgia, serif; }
.skill-card p, .skill-card li { color: var(--ink-soft); font-size: .86rem; }
.skill-card ul { margin: .3rem 0 1.5rem; padding-left: 1.1rem; }
.risk { margin-top: auto; padding-top: 1rem; border-top: 1px solid var(--line); color: var(--ink); font-size: .72rem; text-transform: uppercase; letter-spacing: .08em; }

.connection-list { margin-top: 4rem; border-top: 1px solid var(--line); }
.connection-list article { padding: 1.4rem 0; display: grid; grid-template-columns: 1.25fr .75fr; gap: 2rem; align-items: center; border-bottom: 1px solid var(--line); }
.equation { display: flex; flex-wrap: wrap; align-items: center; gap: .75rem; }
.equation span, .equation strong { padding: .55rem .8rem; border: 1px solid var(--line); border-radius: 999px; font-size: .84rem; }
.equation strong { color: var(--accent-ink); background: var(--accent); border-color: transparent; }
.equation b { color: var(--ink-soft); font-weight: 400; }
.connection-list p { margin: 0; color: var(--ink-soft); font-size: .9rem; }

.signals { background: var(--paper-2); }
.signal-grid { margin-top: 4rem; display: grid; grid-template-columns: repeat(2, 1fr); gap: 1px; border: 1px solid var(--line); background: var(--line); }
.signal-grid article { min-height: 300px; padding: 1.5rem; display: flex; flex-direction: column; background: var(--paper-2); }
.signal-grid article > span { color: var(--accent); text-transform: uppercase; letter-spacing: .1em; font: .62rem/1 ui-monospace, monospace; }
.signal-grid h3 { margin: 2.4rem 0 .8rem; max-width: 27ch; font: 400 1.75rem/1.06 Georgia, serif; }
.signal-grid p { color: var(--ink-soft); font-size: .86rem; }
.signal-grid a { min-height: 44px; margin-top: auto; padding-top: 1rem; display: flex; align-items: center; border-top: 1px solid var(--line); color: var(--ink); text-decoration: none; font-size: .73rem; }
.signal-grid a:hover { color: var(--accent); }

.lab { padding-block: clamp(5rem, 10vw, 9rem); border-top: 1px solid var(--line); background: var(--paper-2); }
.lab-grid { width: min(calc(100% - 2.4rem), var(--max)); margin: 4rem auto 0; display: grid; grid-template-columns: repeat(3, 1fr); gap: 1rem; }
.lab-card { min-height: 560px; padding: 1.5rem; display: flex; flex-direction: column; border: 1px solid var(--line); border-radius: var(--radius); background: var(--paper); overflow: hidden; }
.lab-card-head { display: flex; justify-content: space-between; color: var(--ink-soft); text-transform: uppercase; letter-spacing: .09em; font: .63rem/1 ui-monospace, monospace; }
.lab-card h3 { margin: 3rem 0 2rem; font: 400 2rem/1.03 Georgia, serif; }
.mini-form { padding: 1rem; border: 1px solid var(--line); border-radius: .8rem; background: var(--paper-2); }
.mini-form label { display: block; font-weight: 700; font-size: .85rem; }
.hint { display: block; margin: .15rem 0 .7rem; color: var(--ink-soft); font-size: .7rem; }
.mini-form input { width: 100%; min-height: 44px; padding: .6rem .7rem; border: 1px solid var(--warm); border-radius: .45rem; color: var(--ink); background: var(--paper); }
.error-copy { min-height: 2.7em; margin: .6rem 0 0; color: var(--warm); font-size: .72rem; font-weight: 650; }
.lab-action { align-self: flex-start; margin-top: 1rem; }
.lab-caption { margin: auto 0 0; padding-top: 1.5rem; border-top: 1px solid var(--line); color: var(--ink-soft); font-size: .82rem; }
.lab-caption strong { color: var(--ink); }
.state-stage { min-height: 180px; display: grid; place-items: center; align-content: center; gap: 1rem; border-radius: .9rem; background: var(--paper-2); }
.save-button { min-height: 48px; padding: .7rem 1.05rem; display: inline-flex; align-items: center; gap: .65rem; border: 0; border-radius: .6rem; color: var(--accent-ink); background: var(--accent); font-weight: 750; cursor: pointer; }
.save-button:disabled { cursor: wait; opacity: .78; }
.save-button.is-loading .save-icon { animation: spin 1s linear infinite; }
.save-button.is-success { background: #75e6a4; }
.status-line { margin: 0; color: var(--ink-soft); font-size: .72rem; }
.state-track { display: flex; gap: .4rem; margin-top: 1rem; }
.state-track span { flex: 1; padding: .45rem; border: 1px solid var(--line); border-radius: 999px; color: var(--ink-soft); text-align: center; font: .58rem/1 ui-monospace, monospace; }
.state-track .is-current { background: var(--paper-3); color: var(--accent); border-color: var(--accent); }
.motion-stage { position: relative; min-height: 180px; border-radius: .9rem; background: var(--paper-2); overflow: hidden; }
.motion-origin, .motion-target { position: absolute; top: 50%; translate: 0 -50%; display: grid; place-items: center; width: 40px; height: 40px; border: 1px solid var(--line); border-radius: 50%; color: var(--ink-soft); font: .7rem/1 ui-monospace, monospace; }
.motion-origin { left: 1.5rem; }.motion-target { right: 1.5rem; }
.motion-path { position: absolute; left: 4.4rem; right: 4.4rem; top: 50%; border-top: 1px dashed var(--line); }
.motion-object { position: absolute; left: 4.8rem; top: 50%; translate: 0 -50%; color: var(--accent); filter: drop-shadow(0 0 12px var(--accent)); }
.motion-stage.is-playing .motion-object { animation: travel 1.2s var(--ease) both; }

.bookmark-grid { margin-top: 4rem; display: grid; grid-template-columns: repeat(2, 1fr); gap: 1px; border: 1px solid var(--line); background: var(--line); }
.bookmark-grid a { min-height: 240px; padding: 1.4rem; display: flex; flex-direction: column; background: var(--paper); text-decoration: none; transition: background .25s; }
.bookmark-grid a:hover { background: var(--paper-3); }
.bookmark-grid a > span { color: var(--accent); text-transform: uppercase; letter-spacing: .1em; font: .62rem/1 ui-monospace, monospace; }
.bookmark-grid h3 { margin: 2.2rem 0 .7rem; max-width: 25ch; font: 400 1.55rem/1.08 Georgia, serif; }
.bookmark-grid p { color: var(--ink-soft); font-size: .83rem; }
.bookmark-grid small { margin-top: auto; color: var(--ink-soft); }
code { font: .88em ui-monospace, SFMono-Regular, Menlo, monospace; color: var(--accent); }

.matrix-table { margin-top: 4rem; border: 1px solid var(--line); }
.matrix-row { min-height: 74px; padding: 1rem; display: grid; grid-template-columns: .7fr .7fr 1.4fr 1.4fr; gap: 1rem; align-items: center; border-bottom: 1px solid var(--line); }
.matrix-row:last-child { border-bottom: 0; }
.matrix-head { min-height: 46px; color: var(--ink-soft); text-transform: uppercase; letter-spacing: .08em; font: .62rem/1 ui-monospace, monospace; background: var(--paper-2); }
.matrix-row span { color: var(--ink-soft); font-size: .84rem; }
.matrix-row strong { color: var(--accent); }

.roadmap { padding-block: clamp(5rem, 10vw, 9rem); border-top: 1px solid var(--line); background: var(--accent); color: var(--accent-ink); }
.roadmap h2, .roadmap .eyebrow, .roadmap .section-number { color: var(--accent-ink); }
.roadmap-grid { width: min(calc(100% - 2.4rem), calc(var(--max) - 104px)); margin: 4rem auto 0; display: grid; grid-template-columns: repeat(3, 1fr); border: 1px solid color-mix(in srgb, var(--accent-ink) 28%, transparent); }
.roadmap-grid article { min-height: 440px; padding: 1.5rem; display: flex; flex-direction: column; border-right: 1px solid color-mix(in srgb, var(--accent-ink) 28%, transparent); }
.roadmap-grid article:last-child { border-right: 0; }
.phase { text-transform: uppercase; letter-spacing: .12em; font: .64rem/1 ui-monospace, monospace; }
.roadmap-grid h3 { margin: 3.5rem 0 1rem; font: 400 2rem/1 Georgia, serif; }
.roadmap-grid p, .roadmap-grid li { font-size: .88rem; }
.roadmap-grid ul { padding-left: 1.1rem; }
.roadmap-grid strong { margin-top: auto; padding-top: 1rem; border-top: 1px solid color-mix(in srgb, var(--accent-ink) 28%, transparent); font-size: .78rem; }

.check-grid { margin-top: 4rem; display: grid; grid-template-columns: repeat(2, 1fr); gap: 1px; border: 1px solid var(--line); background: var(--line); }
.check-grid label { min-height: 86px; padding: 1rem; display: flex; align-items: center; gap: 1rem; background: var(--paper); cursor: pointer; }
.check-grid label:hover { background: var(--paper-2); }
.check-grid input { appearance: none; flex: 0 0 auto; width: 26px; height: 26px; display: grid; place-items: center; border: 1px solid var(--ink-soft); border-radius: .35rem; background: transparent; cursor: pointer; }
.check-grid input::after { content: "✓"; color: var(--accent-ink); font-size: .9rem; font-weight: 850; transform: scale(0); }
.check-grid input:checked { border-color: var(--accent); background: var(--accent); }
.check-grid input:checked::after { transform: scale(1); }
.check-grid span { color: var(--ink-soft); font-size: .85rem; }
.check-grid strong { color: var(--ink); }
.check-progress { margin-top: 1rem; display: flex; align-items: center; gap: 1rem; color: var(--ink-soft); font: .7rem/1 ui-monospace, monospace; }
.check-bar { height: 4px; flex: 1; background: var(--paper-3); overflow: hidden; }
.check-bar i { display: block; width: 0; height: 100%; background: var(--accent); transition: width .45s var(--ease); }

.source-columns { margin-top: 4rem; display: grid; grid-template-columns: repeat(4, 1fr); gap: 2rem; }
.source-columns h3 { padding-bottom: 1rem; border-bottom: 1px solid var(--line); }
.source-columns a { min-height: 48px; padding: .7rem 0; display: flex; justify-content: space-between; gap: 1rem; border-bottom: 1px solid var(--line); color: var(--ink-soft); text-decoration: none; font-size: .82rem; }
.source-columns a:hover { color: var(--accent); }
.source-note { margin-top: 3rem; max-width: 80ch; color: var(--ink-soft); font-size: .74rem; }
footer { width: min(calc(100% - 2.4rem), var(--max)); margin-inline: auto; min-height: 130px; display: flex; align-items: center; justify-content: space-between; border-top: 1px solid var(--line); color: var(--ink-soft); font-size: .78rem; }
footer p { margin: 0; } footer p span { color: var(--accent); } footer a { min-height: 44px; display: inline-flex; align-items: center; text-decoration: none; }

.not-found-page { min-height: 100vh; padding: 1.2rem; display: grid; place-items: center; }
.not-found { min-width: 0; width: min(100%, 44rem); padding: clamp(2rem, 8vw, 5rem); border: 1px solid var(--line); border-radius: var(--radius); background: var(--paper-2); }
.not-found h1 { font-size: clamp(3rem, 9vw, 6rem); }
.not-found p:not(.eyebrow) { max-width: 48ch; color: var(--ink-soft); }
.not-found .button { margin-top: 1rem; }

@keyframes spin { to { transform: rotate(360deg); } }
@keyframes travel { 0% { left: 4.8rem; } 65% { left: calc(100% - 5.4rem); transform: scale(1.3); } 100% { left: calc(100% - 5.4rem); transform: scale(1); } }

@media (max-width: 900px) {
  body { padding-bottom: calc(4.9rem + env(safe-area-inset-bottom)); }
  body.not-found-page { padding-bottom: 1.2rem; }
  .site-header { grid-template-columns: 1fr auto; background: color-mix(in srgb, var(--paper) 96%, transparent); backdrop-filter: none; }
  .site-header nav { position: fixed; inset: auto .75rem calc(.75rem + env(safe-area-inset-bottom)); z-index: 60; padding: .4rem; display: flex; justify-content: space-between; gap: .2rem; border: 1px solid var(--line); border-radius: 999px; background: color-mix(in srgb, var(--paper) 94%, transparent); box-shadow: 0 12px 40px rgba(0, 0, 0, .32); backdrop-filter: blur(18px); }
  .site-header nav a { min-width: 0; min-height: 44px; padding: .65rem .8rem; display: grid; place-items: center; border-radius: 999px; font-size: .74rem; }
  .site-header nav a:hover { background: var(--paper-3); }
  .hero { grid-template-columns: 1fr; }.hero-visual { min-height: 480px; }
  .method-grid { grid-template-columns: repeat(2, 1fr); }
  .skill-grid, .roadmap-grid { grid-template-columns: repeat(2, 1fr); }
  .source-columns { grid-template-columns: repeat(2, 1fr); }
  .lab-grid { grid-template-columns: 1fr; }.lab-card { min-height: 510px; }
  .roadmap-grid article:nth-child(2) { border-right: 0; }.roadmap-grid article:last-child { border-top: 1px solid color-mix(in srgb, var(--accent-ink) 28%, transparent); }
}

@media (max-width: 640px) {
  .site-header { padding-inline: 1rem; }.brand > span:last-child { display: none; }
  .site-header nav { inset-inline: .5rem; }
  .site-header nav a { padding-inline: .45rem; font-size: .68rem; }
  .section-shell, .atlas-heading, .lab-heading, .roadmap-heading { grid-template-columns: 1fr; gap: .7rem; }
  h1 { font-size: clamp(2.75rem, 14vw, 3.2rem); }
  .hero { padding-top: 3.5rem; }.hero-visual { min-height: 390px; }.skill-constellation { width: min(100%, 320px); }.visual-note { display: none; }
  .hero-stats { justify-content: space-between; gap: .7rem; }.hero-stats div { min-width: 0; }.hero-stats dt { font-size: 1.7rem; }.hero-stats dd { font-size: .66rem; }
  .thesis-grid, .connection-list article, .signal-grid, .skill-grid, .bookmark-grid, .check-grid, .source-columns, .roadmap-grid { grid-template-columns: 1fr; }
  .method-grid { grid-template-columns: 1fr; }.method-grid article { min-height: 230px; }
  .skill-grid, .filter-bar, .roadmap-grid { width: min(calc(100% - 2.4rem), var(--max)); }
  .roadmap-grid article { border-right: 0; border-bottom: 1px solid color-mix(in srgb, var(--accent-ink) 28%, transparent); }.roadmap-grid article:last-child { border-bottom: 0; }
  .matrix-table { border: 0; }.matrix-head { display: none; }.matrix-row { margin-bottom: .7rem; grid-template-columns: 1fr; gap: .6rem; border: 1px solid var(--line); }
  .matrix-row:not(.matrix-head) [role="cell"] { display: grid; grid-template-columns: minmax(6.5rem, .45fr) 1fr; gap: .75rem; align-items: baseline; }
  .matrix-row:not(.matrix-head) [role="cell"]::before { content: attr(data-label); color: var(--ink-soft); text-transform: uppercase; letter-spacing: .08em; font: 600 .58rem/1 ui-monospace, monospace; }
  footer { padding-block: 2rem; align-items: flex-start; flex-direction: column; gap: 1rem; }
}

html[data-motion="reduced"] *, html[data-motion="reduced"] *::before, html[data-motion="reduced"] *::after { scroll-behavior: auto !important; animation-duration: .001ms !important; animation-iteration-count: 1 !important; transition-duration: .001ms !important; }
html[data-motion="reduced"] .motion-stage.is-playing .motion-object { animation: none !important; left: calc(100% - 5.4rem); }
html[data-motion="reduced"] .motion-stage.is-playing .motion-target { color: var(--accent-ink); background: var(--accent); border-color: var(--accent); }
@media (prefers-reduced-motion: reduce) {
  html:not([data-motion="full"]) *, html:not([data-motion="full"]) *::before, html:not([data-motion="full"]) *::after { scroll-behavior: auto !important; animation-duration: .001ms !important; animation-iteration-count: 1 !important; transition-duration: .001ms !important; }
  html:not([data-motion="full"]) .motion-stage.is-playing .motion-object { animation: none !important; left: calc(100% - 5.4rem); }
  html:not([data-motion="full"]) .motion-stage.is-playing .motion-target { color: var(--accent-ink); background: var(--accent); border-color: var(--accent); }
}