/* Hallmark · macrostructure: Catalogue · tone: personal / technical · anchor hue: 245
 * Graphite system. Motion explains calculated examples. Critique: P5 H4 E5 S5 R5 V4. */
@import url('/tokens.css');
@import url('/workflow.css?v=20261014-motion2');
@font-face { font-family: 'Space Grotesk'; src: url('/assets/space-grotesk.woff2') format('woff2'); font-weight: 300 700; font-style: normal; font-display: swap; }
@font-face { font-family: Manrope; src: url('/assets/manrope.woff2') format('woff2'); font-weight: 400 800; font-style: normal; font-display: swap; }
@font-face { font-family: 'IBM Plex Mono'; src: url('/assets/ibm-plex-mono.woff2') format('woff2'); font-weight: 400; font-style: normal; font-display: swap; }
* { box-sizing: border-box; }
html { overflow-x: clip; scroll-behavior: smooth; scroll-padding-top: var(--space-xl); }
body { margin: 0; overflow-x: clip; background: var(--color-paper); color: var(--color-ink); font: 400 var(--text-md)/1.7 var(--font-body); -webkit-font-smoothing: antialiased; }
::selection { background: var(--color-accent); color: var(--color-paper); }
a { color: inherit; text-decoration: none; }
button { color: inherit; font: inherit; cursor: pointer; }
a, button { -webkit-tap-highlight-color: var(--color-transparent); }
:focus-visible { outline: 2px solid var(--color-focus); outline-offset: 6px; }
button:disabled { cursor: default; }
a:active, button:active { opacity: .75; }
svg { display: block; }
img { display: block; max-width: 100%; }
h1, h2, h3, h4, p, figure { margin: 0; }
h1, h2, h3, h4 { font-family: var(--font-display); font-style: normal; font-weight: 500; line-height: 1.15; letter-spacing: -.045em; min-width: 0; overflow-wrap: anywhere; }
p { max-width: 65ch; }
button, .text-link, .masthead a, .footer a, .pill-link { white-space: nowrap; }
[hidden] { display: none !important; }
.shell { width: min(100% - 2 * var(--space-lg), 1280px); margin-inline: auto; }
.muted { color: var(--color-muted); }
.accent { color: var(--color-accent); }
.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: clip; clip-path: inset(50%); white-space: nowrap; border: 0; }
.skip { position: fixed; top: var(--space-sm); left: var(--space-sm); z-index: var(--z-sticky); padding: var(--space-sm) var(--space-lg); background: var(--color-ink); color: var(--color-paper); transform: translateY(-180%); }
.skip:focus { transform: none; }
.masthead { display: flex; justify-content: space-between; align-items: center; min-height: 104px; gap: var(--space-lg); }
.wordmark { display: inline-flex; align-items: center; gap: var(--space-sm); font: 600 2rem/1 var(--font-display); letter-spacing: -.07em; min-height: 44px; }
.wordmark svg { width: 26px; height: 26px; transition: transform var(--dur-long) var(--ease-out); }
.wordmark:hover svg, .wordmark:focus-visible svg { opacity: .75; }
.masthead-right { display: flex; align-items: center; gap: var(--space-lg); }
.masthead .text-link { font-size: var(--text-sm); }
.contact-open, .contact-retry { display: inline-flex; align-items: center; justify-content: center; min-height: 44px; padding: var(--space-xs) var(--space-md); border: 1px solid var(--color-rule); border-radius: var(--radius-sm); background: var(--color-paper-2); color: var(--color-ink); font-size: var(--text-sm); transition: border-color var(--dur-short) var(--ease-out), background var(--dur-short) var(--ease-out); }
.contact-open:hover, .contact-retry:hover { background: var(--color-paper-3); border-color: var(--color-quiet); }
.contact-dialog { width: min(calc(100% - 2 * var(--space-xs)), 480px); max-width: calc(100% - 2 * var(--space-xs)); max-height: calc(100dvh - 2 * var(--space-md)); margin: auto; padding: var(--space-lg); border: 1px solid var(--color-rule); border-radius: var(--radius-md); background: var(--color-paper); color: var(--color-ink); overflow-y: auto; }
.contact-dialog::backdrop { background: color-mix(in oklch, var(--color-paper) 82%, transparent); backdrop-filter: blur(6px); }
.contact-dialog-heading { display: flex; align-items: center; justify-content: space-between; gap: var(--space-sm); }
.contact-dialog h2 { font-size: 2rem; }
.contact-close { display: grid; place-items: center; width: 44px; height: 44px; flex-shrink: 0; margin-right: calc(-1 * var(--space-xs)); padding: var(--space-sm); border: 0; border-radius: var(--radius-sm); background: var(--color-transparent); color: var(--color-muted); }
.contact-close:hover { color: var(--color-ink); background: var(--color-paper-2); }
.contact-close svg { width: 20px; height: 20px; }
.contact-dialog > p { margin-top: var(--space-xs); color: var(--color-muted); font-size: var(--text-sm); }
.contact-choices { display: grid; margin-top: var(--space-lg); border-top: 1px solid var(--color-rule); }
.contact-choice { display: flex; width: 100%; align-items: center; justify-content: space-between; gap: var(--space-md); padding: var(--space-md) 0; border: 0; border-bottom: 1px solid var(--color-rule); background: var(--color-transparent); text-align: left; white-space: normal; }
.contact-choice strong { display: block; font-size: var(--text-sm); font-weight: 500; }
.contact-choice small { display: block; margin-top: var(--space-2xs); font-size: var(--text-xs); color: var(--color-muted); overflow-wrap: anywhere; }
.contact-choice:hover strong, .contact-choice:focus-visible strong { color: var(--color-accent); }
.contact-choice .arrow { color: var(--color-muted); }
.contact-back { min-height: 44px; padding: 0; margin-block: var(--space-sm); border: 0; background: var(--color-transparent); color: var(--color-accent); font-size: var(--text-xs); }
.contact-phone h3 { font-size: var(--text-xl); }
.contact-phone-note, .contact-status { margin-top: var(--space-sm); color: var(--color-muted); font-size: var(--text-xs); }
.contact-challenge:not(:empty) { margin-top: var(--space-lg); min-height: 65px; }
.contact-retry { margin-top: var(--space-md); }
.contact-phone-link { display: flex; align-items: center; justify-content: space-between; gap: var(--space-sm); min-height: 60px; margin-top: var(--space-lg); padding: var(--space-md); border: 1px solid var(--color-rule); border-radius: var(--radius-sm); font-size: var(--text-lg); color: var(--color-accent); }
.contact-phone-link::after { content: '↗'; }
html:has(.contact-dialog[open]) { overflow: hidden; }
.motion-enabled .contact-dialog[open] { animation: contact-enter var(--dur-short) var(--ease-out); }
@keyframes contact-enter { from { opacity: 0; transform: translateY(8px); } to { opacity: 1; transform: translateY(0); } }
.motion-toggle { display: inline-flex; align-items: center; justify-content: center; gap: var(--space-xs); height: 44px; min-width: 44px; padding: 0 var(--space-sm); background: var(--color-transparent); border: 1px solid var(--color-rule); border-radius: var(--radius-sm); }
.motion-toggle svg { width: 14px; height: 14px; }
.motion-toggle .toggle-label { display: none; font-size: var(--text-xs); }
.motion-toggle:disabled { border-style: dashed; }
.text-link { display: inline-flex; align-items: center; gap: var(--space-sm); min-height: 44px; font-size: var(--text-sm); position: relative; }
.text-link::after { position: absolute; content: ''; height: 1px; left: 0; bottom: 5px; right: 0; background: currentColor; transform: scaleX(0); transform-origin: right; transition: transform var(--dur-short) var(--ease-out); }
.text-link:hover::after, .text-link:focus-visible::after { transform: scaleX(1); transform-origin: left; }
.arrow { width: 15px; height: 15px; flex-shrink: 0; transition: transform var(--dur-short) var(--ease-out); }
a:hover .arrow, a:focus-visible .arrow { transform: translate(2px,-2px); }
.down-arrow { transform: rotate(90deg); }
a:hover .down-arrow, a:focus-visible .down-arrow { transform: rotate(90deg) translateX(3px); }
.hero { position: relative; padding: var(--space-xl) 0 var(--space-2xl); }
.hero-grid { display: grid; gap: var(--space-lg); align-items: center; }
.intro-line { display: flex; align-items: center; gap: var(--space-sm); color: var(--color-ink-2); font-size: var(--text-xs); margin-bottom: var(--space-xl); }
.intro-line::before { content: ''; width: 6px; height: 6px; background: var(--color-accent); border-radius: var(--radius-round); }
.hero h1 { font-size: var(--text-display); font-weight: 500; line-height: .99; letter-spacing: -.075em; }
.hero h1 span { display: block; }
.hero h1 .name-stop { display: inline; color: var(--color-accent); }
.hero-intro { color: var(--color-ink-2); font-size: var(--text-md); line-height: 1.85; max-width: 420px; margin-top: var(--space-xl); }
.hero-links { display: flex; flex-wrap: wrap; column-gap: var(--space-xl); margin-top: var(--space-lg); }
.hero-links > a:first-child { color: var(--color-ink); }
.hero-links > a:last-child { color: var(--color-muted); }
.hero-art { position: relative; min-width: 0; }
.hero-art svg { width: 100%; height: auto; overflow: visible; }
.hero-art figcaption { color: var(--color-muted); font-size: var(--text-xs); text-align: center; padding-top: var(--space-sm); }
.diagram { color: var(--color-ink-2); }
.diagram .guide { fill: none; stroke: var(--color-rule-soft); stroke-width: 1; }
.diagram .wire { fill: none; stroke: var(--color-quiet); stroke-width: 1; }
.diagram .bright-wire { fill: none; stroke: var(--color-accent); stroke-width: 1.1; }
.diagram .node { fill: var(--color-paper); stroke: var(--color-quiet); stroke-width: 1; }
.diagram .small-node { fill: var(--color-ink-2); }
.diagram .signal { fill: var(--color-accent); }
.diagram text { font-family: var(--font-body); fill: var(--color-ink-2); font-size: 12px; letter-spacing: .02em; }
.diagram .diagram-title { font-family: var(--font-display); font-size: 104px; font-weight: 500; fill: var(--color-ink); letter-spacing: -.06em; }
.diagram .node-label { font-size: 12px; fill: var(--color-muted); }
.diagram .core-label { font-family: var(--font-mono); font-size: 12px; }
.diagram .tiny-label { font-size: 10px; fill: var(--color-muted); }
.hero-bottom { display: flex; flex-wrap: wrap; gap: var(--space-md) var(--space-xl); margin-top: var(--space-xl); padding-top: var(--space-lg); border-top: 1px solid var(--color-rule); color: var(--color-muted); font-size: var(--text-xs); }
.hero-bottom p { flex: 1; min-width: 200px; max-width: none; }
.hero-bottom a { color: var(--color-ink-2); }
.section { padding-top: var(--space-2xl); padding-bottom: var(--space-xl); }
.section-top { display: flex; flex-wrap: wrap; justify-content: space-between; align-items: baseline; gap: var(--space-md); margin-bottom: var(--space-xl); }
.section-top h2 { font-size: var(--text-2xl); }
.section-top p { color: var(--color-muted); font-size: var(--text-sm); }
.project-grid { display: grid; grid-template-columns: minmax(0,1fr); gap: var(--space-2xl) var(--space-xl); }
.project { position: relative; min-width: 0; }
.project-art-link { display: block; border-radius: var(--radius-sm); }
.project-art { display: grid; align-items: center; aspect-ratio: 1.63; background: var(--color-paper-2); border: 1px solid var(--color-rule-soft); overflow: clip; position: relative; }
.project-art::after { content: ''; position: absolute; inset: 0; pointer-events: none; border: 1px solid var(--color-rule); opacity: 0; transition: opacity var(--dur-short) var(--ease-out); }
.project-art-link:hover .project-art::after, .project-art-link:focus-visible .project-art::after { opacity: 1; }
.project-art svg { width: 100%; height: auto; }
.project-art .diagram .node { fill: var(--color-paper-2); }
.project-meta { display: flex; justify-content: space-between; align-items: center; gap: var(--space-sm); margin-top: var(--space-lg); }
.project-meta p { color: var(--color-muted); font-size: var(--text-xs); }
.project-title { display: flex; align-items: center; justify-content: space-between; gap: var(--space-md); margin-top: var(--space-xs); min-height: 44px; }
.project-title h3 { font-size: clamp(1.8rem, 3.3vw, 2.6rem); }
.project-title .arrow { width: 21px; height: 21px; }
.project-description { margin-top: var(--space-md); color: var(--color-ink-2); font-size: var(--text-sm); line-height: 1.85; max-width: 54ch; }
.project-links { display: flex; gap: var(--space-lg); margin-top: var(--space-sm); }
.project-links a { color: var(--color-muted); font-size: var(--text-xs); }
.project-code { padding: var(--space-xl); font: 400 clamp(.6rem, 1.1vw, .9rem)/1.9 var(--font-mono); color: var(--color-ink-2); white-space: pre; margin: 0; }
.project-code .code-key { color: var(--color-accent); }
.project-code .code-comment { color: var(--color-muted); }
.code-scan { position: absolute; inset: 0; pointer-events: none; }
.code-scan::after { content: ''; position: absolute; top: 42%; height: 1px; left: var(--space-xl); right: var(--space-xl); background: var(--color-accent); opacity: .4; }
.activity { padding-top: var(--space-3xl); padding-bottom: var(--space-3xl); }
.activity-intro { color: var(--color-ink-2); font-size: var(--text-sm); margin-bottom: var(--space-xl); }
.contribution-list { border-top: 1px solid var(--color-rule); }
.contribution { display: grid; grid-template-columns: 1fr auto; gap: var(--space-xs) var(--space-lg); align-items: center; padding: var(--space-lg) 0; border-bottom: 1px solid var(--color-rule); }
.contribution-name { font-size: var(--text-md); font-weight: 500; letter-spacing: -.015em; }
.contribution .pr-id { color: var(--color-muted); font-size: var(--text-xs); }
.contribution .arrow { grid-column: 2; grid-row: 1 / 3; color: var(--color-ink-2); }
.contribution-name span { display: block; color: var(--color-muted); font-size: var(--text-xs); font-weight: 400; margin-bottom: var(--space-2xs); }
.contribution:hover .contribution-name, .contribution:focus-visible .contribution-name { color: var(--color-accent); }
.merged { color: var(--color-ink-2); font-size: var(--text-xs); display: inline-flex; align-items: center; gap: var(--space-xs); }
.merged::before { content: '↳'; color: var(--color-accent); }
.activity-bottom { display: flex; justify-content: space-between; flex-wrap: wrap; align-items: baseline; gap: var(--space-sm); margin-top: var(--space-md); color: var(--color-muted); font-size: var(--text-xs); }
.about { border-top: 1px solid var(--color-rule); padding-top: var(--space-2xl); padding-bottom: var(--space-3xl); display: grid; gap: var(--space-xl); }
.about h2 { font-size: var(--text-2xl); }
.about-copy { display: grid; gap: var(--space-lg); }
.about-copy p { font-size: var(--text-lg); line-height: 1.9; color: var(--color-ink-2); }
.about-copy p a { text-decoration: underline; text-decoration-color: var(--color-quiet); text-underline-offset: .25em; }
.about-copy .about-note { font-size: var(--text-sm); color: var(--color-muted); }
.contact-links { display: flex; flex-wrap: wrap; gap: var(--space-md) var(--space-xl); }
.archive-line { padding-top: var(--space-lg); border-top: 1px solid var(--color-rule-soft); color: var(--color-muted); font-size: var(--text-sm); }
.archive-line .text-link { color: var(--color-ink-2); }
.footer { display: flex; flex-wrap: wrap; gap: var(--space-md) var(--space-lg); align-items: center; justify-content: space-between; padding: var(--space-lg) 0 var(--space-xl); border-top: 1px solid var(--color-rule); font-size: var(--text-xs); color: var(--color-muted); }
.footer .footer-name { color: var(--color-ink-2); }
.footer-links { display: flex; gap: var(--space-lg); }
.footer-links a { display: flex; align-items: center; min-height: 44px; }
.detail-hero { padding: var(--space-lg) 0 var(--space-2xl); }
.back-link { color: var(--color-muted); margin-bottom: var(--space-xl); }
.back-link .arrow { transform: rotate(180deg); }
.detail-header { display: grid; gap: var(--space-xl); align-items: center; }
.detail-kind { color: var(--color-muted); font-size: var(--text-sm); margin-bottom: var(--space-lg); }
.detail-header h1 { font-size: var(--text-display-s); line-height: 1.02; }
.detail-description { font-size: var(--text-lg); color: var(--color-ink-2); margin-top: var(--space-lg); max-width: 48ch; }
.detail-header .project-links { margin-top: var(--space-lg); }
.detail-header .project-links a { color: var(--color-ink); font-size: var(--text-sm); }
.detail-art { min-width: 0; }
.detail-art svg { width: 100%; }
.detail-body { display: grid; grid-template-columns: minmax(0,1fr); gap: var(--space-2xl); padding-bottom: var(--space-3xl); }
.detail-section { min-width: 0; border-top: 1px solid var(--color-rule); padding-top: var(--space-xl); }
.detail-section h2 { font-size: clamp(1.75rem, 3vw, 2.75rem); margin-bottom: var(--space-lg); }
.detail-section > p { color: var(--color-ink-2); margin-bottom: var(--space-lg); }
.detail-section ul { padding-left: var(--space-lg); color: var(--color-ink-2); max-width: 68ch; }
.detail-section li { padding-left: var(--space-xs); margin-bottom: var(--space-sm); }
.detail-section a:not(.text-link):not(.contribution) { color: var(--color-ink); text-decoration: underline; text-underline-offset: .25em; }
.reading { display: grid; gap: var(--space-md); }
.reading a { display: flex; justify-content: space-between; align-items: center; gap: var(--space-lg); padding-block: var(--space-sm); text-decoration: none !important; border-bottom: 1px solid var(--color-rule-soft); }
.reading a span { color: var(--color-ink-2); }
.note { padding: var(--space-lg); background: var(--color-paper-2); border-radius: var(--radius-sm); color: var(--color-ink-2); font-size: var(--text-sm); }
.proof-example { margin: 0; padding: var(--space-lg); background: var(--color-paper-2); color: var(--color-ink-2); font: 400 var(--text-xs)/1.8 var(--font-mono); overflow-x: auto; border-radius: var(--radius-sm); }
.next-project { display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: var(--space-md); padding-top: var(--space-xl); border-top: 1px solid var(--color-rule); }
.next-project p { font-size: var(--text-sm); color: var(--color-muted); }
.next-project a { font-family: var(--font-display); font-size: var(--text-xl); }
.not-found { padding-block: var(--space-3xl); min-height: 55svh; }
.not-found h1 { font-size: var(--text-display-s); margin-bottom: var(--space-lg); }
.not-found p { color: var(--color-ink-2); }
.not-found .text-link { margin-top: var(--space-lg); }

/* Repeated motion is deliberate; the user can pause it at any point. */
.motion-enabled .ambient.is-visible .pulse { animation: signal-pulse 4.8s var(--ease-in-out) infinite; }
.motion-enabled .ambient.is-visible .pulse:nth-child(2n) { animation-delay: -.8s; }
.motion-enabled .ambient.is-visible .pulse:nth-child(3n) { animation-delay: -1.6s; }
.motion-enabled .ambient.is-visible .pulse:nth-child(5n) { animation-delay: -2.4s; }
.motion-enabled .ambient.is-visible .spin { transform-box: fill-box; transform-origin: center; animation: orbit-turn 40s linear infinite; }
.motion-enabled .ambient.is-visible .spin-slow { transform-box: fill-box; transform-origin: center; animation: orbit-turn 60s linear infinite reverse; }
.motion-enabled .ambient.is-visible .drift { animation: drift 7s var(--ease-in-out) infinite alternate; }
.motion-enabled .ambient.is-visible .flow { animation: flow 4s var(--ease-in-out) infinite; }
.motion-enabled .ambient.is-visible .flow:nth-child(2n) { animation-delay: -1s; }
.motion-enabled .ambient.is-visible .flow:nth-child(3n) { animation-delay: -2s; }
.motion-enabled .ambient.is-visible .code-scan { animation: scan 5s var(--ease-in-out) infinite alternate; }
.page-hidden *, .motion-paused * { animation-play-state: paused !important; }
.motion-paused .code-scan { display: none; }
.motion-paused { scroll-behavior: auto; }
.motion-paused *, .motion-paused *::before, .motion-paused *::after { transition-duration: 0ms !important; }
@keyframes signal-pulse { 0%, 100% { opacity: .25; } 40%, 60% { opacity: 1; } }
@keyframes orbit-turn { to { transform: rotate(360deg); } }
@keyframes drift { from { transform: translateY(-5px); } to { transform: translateY(5px); } }
@keyframes flow { 0% { opacity: 0; transform: translateX(-42px); } 20% { opacity: 1; } 80% { opacity: 1; } 100% { opacity: 0; transform: translateX(42px); } }
@keyframes scan { from { transform: translateY(-38px); opacity: .25; } to { transform: translateY(38px); opacity: .7; } }
@view-transition { navigation: auto; }
::view-transition-old(root) { animation-duration: 160ms; animation-timing-function: var(--ease-in); }
::view-transition-new(root) { animation-duration: 260ms; animation-timing-function: var(--ease-out); }

@media (min-width: 40rem) {
  .shell { width: min(100% - 2 * var(--space-xl), 1280px); }
  .motion-toggle .toggle-label { display: inline; }
  .project-grid { grid-template-columns: repeat(2,minmax(0,1fr)); }
  .contribution { grid-template-columns: minmax(0,1fr) 140px 20px; }
  .contribution .arrow { grid-column: 3; grid-row: 1; }
  .contribution .pr-id { grid-column: 2; }
  .about { grid-template-columns: minmax(0,.8fr) minmax(0,1.2fr); }
  .detail-body { grid-template-columns: minmax(0,1.45fr) minmax(0,.85fr); column-gap: var(--space-2xl); }
  .detail-wide { grid-column: 1/-1; }
}
@media (min-width: 60rem) {
  .shell { width: min(100% - 2 * var(--space-2xl), 1280px); }
  .masthead { min-height: 116px; }
  .hero { padding-top: var(--space-2xl); padding-bottom: var(--space-xl); }
  .hero-grid { grid-template-columns: minmax(0,1.05fr) minmax(0,1fr); gap: 0; }
  .hero-art { margin-inline: calc(-1 * var(--space-lg)); }
  .hero-bottom { margin-top: var(--space-2xl); }
  .hero-intro { font-size: var(--text-md); }
  .section { padding-top: var(--space-3xl); }
  .project-grid { column-gap: var(--space-xl); row-gap: var(--space-2xl); }
  .detail-header { grid-template-columns: minmax(0,1fr) minmax(0,1fr); gap: var(--space-xl); }
  .detail-hero { padding-bottom: var(--space-3xl); }
  .about { gap: var(--space-3xl); }
}
@media (max-width: 39.99rem) {
  .masthead, .masthead-right { gap: var(--space-sm); }
  .masthead .header-github { display: none; }
  .contact-open { padding-inline: var(--space-sm); }
  .contact-dialog { padding: var(--space-md); }
  .hero-art { max-width: 460px; width: 100%; margin-inline: auto; margin-top: var(--space-lg); }
  .hero-art figcaption { font-size: .625rem; }
  .hero .intro-line { font-size: .6875rem; }
  .section-top { display: block; }
  .section-top p { margin-top: var(--space-md); }
  .hero-bottom { margin-top: var(--space-lg); }
  .project-code { font-size: clamp(.59rem, 2.45vw, .85rem); padding: var(--space-lg); }
  .contribution-name { font-size: var(--text-sm); }
  .activity { padding-block: var(--space-2xl); }
  .footer { align-items: flex-start; }
  .footer-links { flex-wrap: wrap; gap: var(--space-lg); }
  .about-copy p { font-size: var(--text-md); }
}
@media (prefers-reduced-motion: reduce) {
  html:not(.motion-enabled) { scroll-behavior: auto; }
  html:not(.motion-enabled) *, html:not(.motion-enabled) *::before, html:not(.motion-enabled) *::after { animation: none !important; transition-duration: 0ms !important; }
  html:not(.motion-enabled)::view-transition-group(*), html:not(.motion-enabled)::view-transition-old(*), html:not(.motion-enabled)::view-transition-new(*) { animation: none !important; }
  html:not(.motion-enabled) .code-scan { display: none; }
}
/* Turnstile's flexible widget has a 300px minimum width. */
@media (max-width: 23rem) {
  .contact-challenge:not(:empty) { margin-inline: calc(-1 * var(--space-md)); }
}