/* Light theme for the website. Accent colors match the README palette
   (scripts/build.py PAL); ink and paper replace its dark background. */
:root {
  --paper: #f6f3ec;
  --paper-2: #efebe1;
  --card: #fffdf8;
  --ink: #16140f;
  --ink-2: #3a362e;
  --muted: #6d675c;
  --line: #d9d2c3;

  --yellow: #ffc730;
  --orange: #ff8f42;
  --red: #ff4b4b;
  --pink: #ff4fa3;
  --violet: #a26bff;
  --blue: #3d8bff;
  --teal: #00c9b0;
  --lime: #b6ec2c;

  --shadow: 4px 4px 0 var(--ink);
  --shadow-lg: 7px 7px 0 var(--ink);
  --radius: 14px;
  --display: "Unbounded", "Space Grotesk", system-ui, sans-serif;
  --sans: "Space Grotesk", system-ui, -apple-system, "Segoe UI", sans-serif;
  --mono: "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, monospace;
  --gutter: clamp(16px, 4vw, 48px);
  --max: 1180px;
  color-scheme: light;
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 84px; }
body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font: 400 17px/1.65 var(--sans);
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
  /* faint ledger grid */
  background-image:
    linear-gradient(var(--paper-2) 1px, transparent 1px),
    linear-gradient(90deg, var(--paper-2) 1px, transparent 1px);
  background-size: 44px 44px;
  background-attachment: fixed;
}
a { color: inherit; }
img { max-width: 100%; display: block; }
code, pre { font-family: var(--mono); }
::selection { background: var(--yellow); color: var(--ink); }
:focus-visible { outline: 3px solid var(--blue); outline-offset: 3px; border-radius: 6px; }

.skip { position: absolute; left: -999px; top: 8px; z-index: 100; background: var(--ink); color: var(--paper); padding: 8px 14px; border-radius: 8px; }
.skip:focus { left: 8px; }

/* ------------------------------------------------------------------ nav -- */
.nav {
  position: sticky; top: 0; z-index: 50;
  display: flex; align-items: center; justify-content: space-between; gap: 16px;
  padding: 14px var(--gutter);
  background: color-mix(in srgb, var(--paper) 86%, transparent);
  backdrop-filter: blur(10px);
  border-bottom: 2px solid var(--ink);
}
.brand { display: flex; align-items: center; gap: 10px; text-decoration: none; font: 700 16px var(--display); letter-spacing: .02em; white-space: nowrap; }
.brand-mark {
  display: grid; place-items: center; width: 32px; height: 32px;
  background: var(--yellow); border: 2px solid var(--ink); border-radius: 8px; box-shadow: 2px 2px 0 var(--ink);
  font-size: 15px;
}
.nav nav { display: flex; gap: 4px; overflow-x: auto; scrollbar-width: none; }
.nav nav a {
  font: 500 14px var(--sans); text-decoration: none; padding: 6px 12px; border-radius: 999px;
  border: 2px solid transparent; white-space: nowrap; transition: border-color .2s, background .2s;
}
.nav nav a:hover, .nav nav a.is-active { border-color: var(--ink); background: var(--card); }

/* -------------------------------------------------------------- buttons -- */
.btn {
  --c: var(--card);
  display: inline-flex; align-items: center; gap: 8px;
  padding: 12px 20px; border: 2px solid var(--ink); border-radius: 12px;
  background: var(--c); color: var(--ink); text-decoration: none;
  font: 700 15px var(--sans); box-shadow: var(--shadow);
  transition: transform .15s, box-shadow .15s;
}
.btn:hover { transform: translate(-2px, -2px); box-shadow: 6px 6px 0 var(--ink); }
.btn:active { transform: translate(2px, 2px); box-shadow: 1px 1px 0 var(--ink); }
.btn-ink { --c: var(--ink); color: var(--paper); box-shadow: 4px 4px 0 var(--yellow); }
.btn-ink:hover { box-shadow: 6px 6px 0 var(--yellow); }
.btn-yellow { --c: var(--yellow); } .btn-lime { --c: var(--lime); }
.btn-blue { --c: var(--blue); color: #fff; } .btn-pink { --c: var(--pink); color: #fff; }
.btn-sm { padding: 8px 14px; font-size: 14px; box-shadow: 3px 3px 0 var(--ink); }

.eyebrow { display: inline-flex; align-items: center; gap: 10px; margin: 0; font: 700 12px var(--mono); letter-spacing: .12em; text-transform: uppercase; color: var(--ink-2); }
.dot { width: 9px; height: 9px; border-radius: 50%; background: var(--lime); border: 2px solid var(--ink); animation: pulse 2s infinite; }
@keyframes pulse { 50% { box-shadow: 0 0 0 6px color-mix(in srgb, var(--lime) 35%, transparent); } }

/* ----------------------------------------------------------------- hero -- */
.hero {
  max-width: var(--max); margin: 0 auto; padding: clamp(28px, 5vw, 64px) var(--gutter) 24px;
  display: grid; grid-template-columns: 1.05fr 1fr; gap: 24px; align-items: center;
}
.hero-name { margin: 18px 0 8px; font: 800 clamp(52px, 8.4vw, 112px)/.92 var(--display); letter-spacing: -.02em; }
.hero-name .line { display: block; white-space: nowrap; }
/* Stroke painted under the fill hides the overlapping contours inside the glyphs. */
.hero-name .line-2 { color: var(--yellow); -webkit-text-stroke: 6px var(--ink); paint-order: stroke fill; }
.hero-name .ch { display: inline-block; }
.hero-full { margin: 14px 0 0; font: 500 15px var(--mono); color: var(--muted); }
.hero-tagline { margin: 18px 0 28px; font-size: clamp(19px, 2.2vw, 24px); font-weight: 500; }
.rotator { background: linear-gradient(transparent 58%, var(--yellow) 58%); padding: 0 4px; font-weight: 700; }
.caret { display: inline-block; width: 3px; height: 1.05em; margin-left: 3px; vertical-align: -3px; background: var(--ink); animation: blink 1s steps(1) infinite; }
@keyframes blink { 50% { opacity: 0; } }
.hero-cta { display: flex; flex-wrap: wrap; gap: 14px; }

.stats { display: grid; grid-template-columns: repeat(4, auto); gap: 10px 28px; justify-content: start; margin: 36px 0 0; }
.stats div { border-left: 3px solid var(--ink); padding-left: 12px; }
.stats dt { font: 700 11px var(--mono); letter-spacing: .1em; text-transform: uppercase; color: var(--muted); }
.stats dd { margin: 2px 0 0; font: 800 30px var(--display); }

.hero-3d { position: relative; aspect-ratio: 6 / 5; min-height: 300px; }
.hero-3d canvas { width: 100%; height: 100%; display: block; cursor: grab; touch-action: pan-y; }
.hero-3d canvas:active { cursor: grabbing; }
.hint { position: absolute; bottom: 4px; right: 8px; margin: 0; font: 400 12px var(--mono); color: var(--muted); }
.hint::before { content: "↻ "; }

/* --------------------------------------------------------------- quotes -- */
/* One wide band: mark · quote · dots, so each quote fits on a line or two. */
.quotes {
  max-width: var(--max); margin: 8px auto 0; padding: 0 var(--gutter);
  display: grid; grid-template-columns: auto 1fr auto; align-items: center; gap: 12px 24px;
}
.quotes > * { min-width: 0; }
.quote-mark {
  display: grid; place-items: center; width: 64px; height: 64px;
  background: var(--yellow); border: 2px solid var(--ink); border-radius: 14px; box-shadow: var(--shadow);
  font: 800 64px/1 var(--display); padding-top: 26px;
}
.quote-stage { display: grid; align-items: center; min-height: 84px; padding: 10px 0; border-block: 2px solid var(--ink); }
.quote { grid-area: 1 / 1; margin: 0; opacity: 0; visibility: hidden; transition: opacity .5s, visibility .5s; }
.quote.is-on { opacity: 1; visibility: visible; }
.quote blockquote { display: inline; margin: 0; font: 600 clamp(17px, 1.9vw, 22px)/1.35 var(--display); letter-spacing: -.01em; }
.quote .w { display: inline-block; }
.quote figcaption { display: inline; margin-left: 12px; font: 400 13px var(--mono); color: var(--muted); white-space: nowrap; }
.quote figcaption::before { content: "— "; }
.quote-dots { display: flex; gap: 8px; }
.quote-dots button { width: 12px; height: 12px; padding: 0; border: 2px solid var(--ink); border-radius: 50%; background: transparent; cursor: pointer; transition: background .2s, width .2s; }
.quote-dots button.is-on { background: var(--ink); width: 28px; border-radius: 99px; }

/* ------------------------------------------------------------- sections -- */
.section { max-width: var(--max); margin: 0 auto; padding: clamp(48px, 6vw, 80px) var(--gutter) 0; }
.section-head { display: flex; flex-wrap: wrap; align-items: center; gap: 10px 16px; margin-bottom: 24px; }
.section-no { font: 700 13px var(--mono); padding: 3px 10px; border: 2px solid var(--ink); border-radius: 99px; background: var(--card); }
.section-head h2 { margin: 0; font: 800 clamp(30px, 4.2vw, 46px)/1 var(--display); letter-spacing: -.02em; }

.card { background: var(--card); border: 2px solid var(--ink); border-radius: var(--radius); box-shadow: var(--shadow-lg); }

/* about */
.about-grid { display: grid; grid-template-columns: minmax(0, 290px) minmax(0, 1fr); gap: clamp(24px, 4vw, 48px); align-items: start; }
.about-card { padding: 18px; }
.avatar { width: 100%; height: auto; aspect-ratio: 1; object-fit: cover; border: 2px solid var(--ink); border-radius: 10px; background: var(--paper-2); }
/* Wraps instead of scrolling; continuation lines hang under the value. */
.contract {
  margin: 14px 0 0; padding: 14px 16px; background: var(--ink); color: #f5f2ec; border-radius: 10px;
  font-size: 12.5px; line-height: 1.7; white-space: pre-wrap; overflow-wrap: anywhere; overflow: hidden;
}
.contract .kw { color: #ff8f42; } .contract .ty { color: #3dd6ff; } .contract .st { color: var(--lime); }
.about-copy p { margin: 0 0 16px; font-size: clamp(16px, 1.5vw, 18px); color: var(--ink-2); }
.about-copy p:first-child { font-size: clamp(19px, 1.9vw, 22px); line-height: 1.5; color: var(--ink); }
.areas { list-style: none; margin: 24px 0 0; padding: 0; display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 12px; }
.area { padding: 14px 16px 14px 20px; background: var(--card); border: 2px solid var(--ink); border-left: 8px solid var(--c); border-radius: 12px; box-shadow: var(--shadow); transition: transform .2s; }
.area:hover { transform: translateY(-3px); }
.area h3 { margin: 0 0 2px; font: 700 15px/1.3 var(--display); }
.area p { margin: 0; font-size: 14px; color: var(--muted); }

/* publications */
.filters { display: flex; flex-wrap: wrap; gap: 8px; margin-left: auto; }
.chip {
  --c: var(--lime);
  padding: 6px 14px; border: 2px solid var(--ink); border-radius: 99px; background: var(--card);
  font: 700 13px var(--sans); color: var(--ink); cursor: pointer; transition: background .2s, transform .15s;
}
.chip b { margin-left: 4px; font-family: var(--mono); font-weight: 400; }
.chip:hover { transform: translateY(-2px); }
.chip.is-on { background: var(--c); box-shadow: 3px 3px 0 var(--ink); }
.legend { margin: -8px 0 18px; font-size: 14px; color: var(--muted); }
.legend a { color: var(--ink); font-weight: 700; }
.pubs { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 16px; }
.pub {
  display: flex; flex-direction: column; gap: 6px; padding: 16px 18px;
  background: var(--card); border: 2px solid var(--ink); border-top: 8px solid var(--c); border-radius: var(--radius);
  box-shadow: var(--shadow); transition: transform .2s, box-shadow .2s;
}
.pub:hover { transform: translate(-2px, -2px); box-shadow: var(--shadow-lg); }
.pub[hidden] { display: none; }
.pub-meta { display: flex; align-items: center; gap: 8px; }
.pub-no { font: 800 18px var(--display); }
.pub-year { font: 700 13px var(--mono); }
.tag { padding: 1px 8px; border: 2px solid var(--ink); border-radius: 99px; background: var(--c); font: 700 10.5px var(--mono); text-transform: uppercase; letter-spacing: .06em; }
.pub-link { margin-left: auto; font: 700 12px var(--mono); text-decoration: none; padding: 3px 10px; border: 2px solid var(--ink); border-radius: 8px; transition: background .2s; }
.pub-link:hover { background: var(--c); }
.pub-title { margin: 2px 0 0; font: 500 16.5px/1.4 var(--sans); }
.pub-title a { text-decoration: none; }
.pub-title a:hover { text-decoration: underline; text-decoration-thickness: 2px; text-underline-offset: 4px; }
.pub-name { font-weight: 700; background: linear-gradient(transparent 60%, color-mix(in srgb, var(--c) 55%, transparent) 60%); }
.pub-name::after { content: ": "; }
.pub-authors { margin: 0; font-size: 13.5px; color: var(--ink-2); }
.pub-venue { margin: 0; font: 400 12.5px/1.5 var(--mono); color: var(--muted); }
.me { font-weight: 700; color: var(--ink); background: color-mix(in srgb, var(--yellow) 45%, transparent); padding: 0 3px; border-radius: 3px; }
.adv { text-decoration: underline wavy var(--blue); text-underline-offset: 4px; }

/* advisor & lab */
.advisor-grid { display: grid; grid-template-columns: minmax(0, 2fr) minmax(0, 1fr); gap: 24px; align-items: start; }
.advisor { display: grid; grid-template-columns: 180px minmax(0, 1fr); gap: clamp(18px, 3vw, 32px); padding: clamp(18px, 3vw, 28px); }
.advisor-photo { width: 100%; height: auto; aspect-ratio: 1; object-fit: cover; object-position: top; border: 2px solid var(--ink); border-radius: 12px; background: var(--paper-2); }
.advisor-body h3 { margin: 8px 0 4px; font: 800 clamp(22px, 2.6vw, 30px)/1.1 var(--display); }
.advisor-body .vi { display: block; margin-top: 4px; font: 500 16px var(--sans); color: var(--muted); }
.advisor-role { margin: 0 0 10px; font: 400 12.5px/1.6 var(--mono); color: var(--ink-2); }
.advisor-body > p:not([class]) { margin: 0 0 12px; font-size: 15px; color: var(--ink-2); }
.chips { list-style: none; display: flex; flex-wrap: wrap; gap: 6px; margin: 0 0 12px; padding: 0; }
.chips li { padding: 3px 10px; border: 2px solid var(--ink); border-radius: 99px; font: 500 12.5px var(--sans); background: var(--paper); }
.joint { margin: 0; font-size: 14px; }
.joint b { font: 800 18px var(--display); margin-right: 4px; }
.advisor-contact { display: flex; flex-wrap: wrap; align-items: center; gap: 10px; margin-top: 18px; }
.mail {
  display: inline-flex; align-items: center; gap: 8px; padding: 8px 14px; margin-right: auto;
  background: var(--ink); color: var(--paper); border-radius: 10px; text-decoration: none;
  font: 700 14px var(--mono); box-shadow: 3px 3px 0 var(--yellow); transition: transform .15s;
}
.mail:hover { transform: translate(-2px, -2px); }
.lab {
  display: flex; flex-direction: column; gap: 8px; padding: 22px; text-decoration: none; background: var(--yellow);
  transition: transform .2s, box-shadow .2s;
}
.lab:hover { transform: translate(-3px, -3px); box-shadow: 10px 10px 0 var(--ink); }
.lab h3 { margin: 0; font: 800 22px/1.15 var(--display); }
.lab p { margin: 0; }
.lab .lab-org { font: 400 12.5px/1.6 var(--mono); color: var(--ink-2); }
.lab-url { margin-top: auto; padding-top: 8px; font: 700 14px var(--mono); text-decoration: underline; text-underline-offset: 4px; }
/* three linked blocks */
.lab-mark { display: flex; align-items: center; margin-bottom: 6px; }
.lab-mark span { width: 30px; height: 30px; border: 2px solid var(--ink); border-radius: 7px; background: var(--card); }
.lab-mark span + span { margin-left: 14px; position: relative; }
.lab-mark span + span::before { content: ""; position: absolute; left: -16px; top: 12px; width: 14px; height: 2px; background: var(--ink); }
.lab-mark span:nth-child(2) { background: var(--blue); } .lab-mark span:nth-child(3) { background: var(--red); }

/* stack & contact */
.end-grid { display: grid; grid-template-columns: minmax(0, 1.3fr) minmax(0, 1fr); gap: clamp(32px, 5vw, 64px); }
.stack { display: grid; gap: 12px; }
.stack-row { display: grid; grid-template-columns: 170px minmax(0, 1fr); gap: 12px; align-items: center; }
.stack-row h3 { margin: 0; font: 700 12px var(--mono); text-transform: uppercase; letter-spacing: .1em; display: flex; align-items: center; gap: 8px; }
.stack-row h3::before { content: ""; flex: none; width: 12px; height: 12px; background: var(--c); border: 2px solid var(--ink); border-radius: 3px; }
.stack-row ul { list-style: none; margin: 0; padding: 0; display: flex; flex-wrap: wrap; gap: 8px; }
.stack-row li { padding: 4px 11px; background: var(--card); border: 2px solid var(--ink); border-radius: 8px; font: 700 13px var(--mono); box-shadow: 2px 2px 0 var(--ink); transition: background .2s, transform .15s; }
.stack-row li:hover { background: var(--c); transform: translateY(-2px); }
.contact-lead { margin: 0 0 20px; font-size: clamp(17px, 1.8vw, 20px); font-weight: 500; }
.contact-links { display: flex; flex-wrap: wrap; gap: 12px; }

/* footer */
.footer { max-width: var(--max); margin: clamp(56px, 7vw, 88px) auto 0; padding: 22px var(--gutter) 32px; border-top: 2px solid var(--ink); color: var(--muted); font-size: 14px; }
.footer .motto { margin: 0 0 6px; font: 800 clamp(20px, 3vw, 30px)/1.1 var(--display); color: var(--ink); text-transform: lowercase; }
.footer code { font-size: 13px; background: var(--paper-2); padding: 1px 6px; border-radius: 4px; }

/* reveal on scroll (only when JS runs, so the page still reads without it) */
.js .reveal { opacity: 0; transform: translateY(24px); }
.js .reveal.is-in { opacity: 1; transform: none; transition: opacity .7s cubic-bezier(.2, .7, .2, 1), transform .7s cubic-bezier(.2, .7, .2, 1); }

/* ----------------------------------------------------------- responsive -- */
.hero > * { min-width: 0; }
@media (max-width: 980px) {
  .hero { grid-template-columns: 1fr; }
  .hero-3d { max-width: 520px; width: 100%; margin: 0 auto; order: -1; min-height: 0; aspect-ratio: 4 / 3; }
  .about-grid { grid-template-columns: minmax(0, 240px) minmax(0, 1fr); }
  .advisor-grid, .end-grid { grid-template-columns: minmax(0, 1fr); }
}
@media (max-width: 760px) {
  body { font-size: 16px; }
  .hero-name .line-2 { -webkit-text-stroke-width: 4px; }
  .nav nav a { padding: 6px 8px; font-size: 13px; }
  .brand span:last-child { display: none; }
  .stats { grid-template-columns: repeat(4, auto); gap: 8px 16px; }
  .stats dd { font-size: 24px; }
  .quotes { grid-template-columns: auto minmax(0, 1fr); }
  .quote-mark { width: 44px; height: 44px; font-size: 44px; padding-top: 18px; border-radius: 10px; }
  .quote-dots { grid-column: 1 / -1; justify-content: center; }
  .quote figcaption { display: block; margin: 6px 0 0; white-space: normal; }
  .about-grid { grid-template-columns: minmax(0, 1fr); }
  .about-card { display: grid; grid-template-columns: 110px minmax(0, 1fr); gap: 14px; align-items: center; }
  .contract { margin: 0; font-size: 11.5px; padding: 10px 12px; }
  .pubs { grid-template-columns: minmax(0, 1fr); }
  .area { padding: 10px 12px; }
  .area h3 { font-size: 13.5px; }
  .area p { display: none; }
  .filters { margin-left: 0; }
  .advisor { grid-template-columns: 96px minmax(0, 1fr); }
  .stack-row { grid-template-columns: minmax(0, 1fr); gap: 8px; }
}
@media (max-width: 420px) {
  .stats { grid-template-columns: repeat(2, auto); }
  .about-card { grid-template-columns: 88px minmax(0, 1fr); }
  .advisor { grid-template-columns: minmax(0, 1fr); }
  .advisor-photo { width: 120px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: .01ms !important; animation-iteration-count: 1 !important; transition-duration: .01ms !important; }
  .js .reveal { opacity: 1; transform: none; }
}