/* Homepage styles. Self-contained: used only by _layouts/home.html. */

:root {
  --bg: #fafaf8;
  --surface: #ffffff;
  --surface-2: #f3f3ef;
  --text: #1a1c21;
  --muted: #5f6672;
  --faint: #8b919b;
  --line: #e6e5df;
  --accent: #8c1515;
  --accent-soft: #f6e9e8;
  --badge: #1a1c21;
  --badge-text: #ffffff;
  --shadow: 0 1px 2px rgba(20, 22, 28, .04), 0 8px 24px rgba(20, 22, 28, .06);

  --sans: "Inter", system-ui, -apple-system, "Segoe UI", sans-serif;
  --side-w: 264px;
  --main-w: 760px;
  --gap: 56px;
  --radius: 14px;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #0f1114; --surface: #171a1f; --surface-2: #1d2027;
    --text: #e9eaed; --muted: #a2a8b3; --faint: #737a86; --line: #2a2e36;
    --accent: #e8777a; --accent-soft: #3a1d1f; --badge: #e9eaed; --badge-text: #0f1114;
    --shadow: 0 1px 2px rgba(0, 0, 0, .3), 0 8px 24px rgba(0, 0, 0, .25);
  }
}
:root[data-theme="dark"] {
  --bg: #0f1114; --surface: #171a1f; --surface-2: #1d2027;
  --text: #e9eaed; --muted: #a2a8b3; --faint: #737a86; --line: #2a2e36;
  --accent: #e8777a; --accent-soft: #3a1d1f; --badge: #e9eaed; --badge-text: #0f1114;
  --shadow: 0 1px 2px rgba(0, 0, 0, .3), 0 8px 24px rgba(0, 0, 0, .25);
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 24px; -webkit-text-size-adjust: 100%; }
body {
  margin: 0; background: var(--bg); color: var(--text);
  font: 400 16px/1.65 var(--sans); -webkit-font-smoothing: antialiased;
}
img, video, iframe { display: block; max-width: 100%; }
img, video { height: auto; }
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; text-underline-offset: 3px; }
strong { font-weight: 600; }
svg { width: 1em; height: 1em; flex: none; }

.skip-link { position: absolute; left: -999px; top: 8px; background: var(--surface); padding: 8px 12px; border-radius: 8px; z-index: 50; }
.skip-link:focus { left: 8px; }

/* ---------- Shell ---------- */
.shell {
  display: grid; grid-template-columns: var(--side-w) minmax(0, var(--main-w));
  gap: var(--gap); justify-content: center; padding: 56px 32px 0;
}
.side { position: sticky; top: 56px; align-self: start; max-height: calc(100vh - 80px); overflow-y: auto; scrollbar-width: none; }
.main { min-width: 0; }

/* ---------- Profile ---------- */
.profile__avatar { width: 168px; height: auto; border-radius: 0; box-shadow: var(--shadow); }
.profile__name { font: 700 30px/1.15 var(--sans); letter-spacing: -.025em; margin: 20px 0 6px; }
.profile__tagline { margin: 0; color: var(--muted); font-size: 14.5px; line-height: 1.5; }

.links { list-style: none; padding: 0; margin: 16px 0 0; display: grid; gap: 2px; }
.links a { display: flex; align-items: center; gap: 10px; padding: 5px 0; color: var(--muted); font-size: 14.5px; }
.links a:hover { color: var(--text); text-decoration: none; }
.links svg { font-size: 17px; }

/* ---------- Table of contents ---------- */
.twin-cta {
  display: inline-flex; align-items: center; gap: 8px; margin-top: 20px; padding: 8px 14px 8px 10px; border-radius: 10px;
  background: var(--accent); color: #fff; box-shadow: 0 6px 18px color-mix(in srgb, var(--accent) 35%, transparent);
  transition: transform .15s, box-shadow .15s;
}
.twin-cta:hover { text-decoration: none; transform: translateY(-1px); box-shadow: 0 10px 24px color-mix(in srgb, var(--accent) 45%, transparent); }
.twin-cta__icon { display: grid; place-items: center; font-size: 18px; flex: none; }
.twin-cta__text { font-size: 14.5px; font-weight: 600; }
:root[data-theme="dark"] .twin-cta { color: #0f1114; }
@media (prefers-color-scheme: dark) { :root:not([data-theme="light"]) .twin-cta { color: #0f1114; } }

.toc { margin-top: 32px; padding-top: 24px; border-top: 1px solid var(--line); }
.toc__label { margin: 0 0 10px; font-size: 12px; font-weight: 600; letter-spacing: .08em; text-transform: uppercase; color: var(--faint); }
.toc__list { list-style: none; margin: 0; padding: 0; counter-reset: toc; }
.toc__list a {
  position: relative; display: flex; gap: 12px; padding: 6px 0 6px 14px;
  color: var(--muted); font-size: 14.5px; border-left: 2px solid var(--line); transition: color .15s, border-color .15s;
}
.toc__list a::before { counter-increment: toc; content: counter(toc, decimal-leading-zero); color: var(--faint); font-variant-numeric: tabular-nums; font-size: 12.5px; padding-top: 1px; }
.toc__list a:hover { color: var(--text); text-decoration: none; }
.toc__list a.is-active { color: var(--text); font-weight: 600; border-left-color: var(--accent); }
.toc__list a.is-active::before { color: var(--accent); }

.theme-toggle {
  margin-top: 28px; display: inline-flex; align-items: center; gap: 8px; padding: 6px 12px;
  border: 1px solid var(--line); border-radius: 999px; background: transparent; color: var(--muted);
  font: 500 13px var(--sans); cursor: pointer;
}
.theme-toggle:hover { color: var(--text); }

/* ---------- Sections ---------- */
.section { padding: 8px 0 48px; }
.section + .section { border-top: 1px solid var(--line); padding-top: 40px; }
.section__head { display: flex; align-items: baseline; justify-content: space-between; gap: 16px; margin-bottom: 20px; }
.section h2 { font: 600 24px/1.2 var(--sans); margin: 0; letter-spacing: -.02em; }
.section__note { margin: 0; color: var(--faint); font-size: 15px; text-align: right; }

.intro p { margin: 0 0 14px; font-size: 17px; line-height: 1.7; }
.intro a { text-decoration: underline; text-decoration-color: color-mix(in srgb, var(--accent) 40%, transparent); text-underline-offset: 3px; }
.intro a:hover { text-decoration-color: currentColor; }
/* People are underlined but keep the text color; only places and venues get the accent. */
.intro a.person { color: inherit; text-decoration-color: var(--faint); }
.pub__authors a { text-decoration-color: var(--faint); }
.intro p:first-of-type { font: 600 22px/1.3 var(--sans); letter-spacing: -.015em; margin-bottom: 16px; }

/* ---------- News ---------- */
.news { list-style: none; margin: 0; padding: 0; }
.news li { display: grid; grid-template-columns: 76px 1fr; gap: 16px; padding: 9px 0; }
.news time { color: var(--faint); font-variant-numeric: tabular-nums; font-size: 14.5px; padding-top: 1px; }
.news .hl { color: var(--accent); font-weight: 600; }

/* ---------- Publications ---------- */
.pubs { display: grid; gap: 20px; }
.pub {
  display: grid; grid-template-columns: 248px 1fr; gap: 24px; padding: 18px;
  background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius);
  transition: box-shadow .2s, transform .2s;
}
.pub:hover { box-shadow: var(--shadow); }
.pub__cover {
  position: relative; aspect-ratio: 16 / 9; border-radius: 10px; overflow: hidden; background: var(--surface-2);
  cursor: pointer;
}
.pub__cover img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; transition: opacity .3s; }
.pub__cover .anim { opacity: 0; }
.pub__cover.is-animated .anim { opacity: 1; }
.pub__cover.is-animated .still { opacity: 0; }
.pub__cover .hint {
  position: absolute; right: 8px; bottom: 8px; font-size: 13px; font-weight: 500; padding: 3px 10px; border-radius: 999px;
  background: rgba(0, 0, 0, .55); color: #fff; opacity: 0; transition: opacity .2s; pointer-events: none;
}
.pub__cover:hover .hint { opacity: 1; }


.pub__venue { display: flex; flex-wrap: wrap; align-items: center; gap: 8px; margin-bottom: 6px; }
.badge { font-size: 12px; font-weight: 600; padding: 2px 9px; border-radius: 6px; background: var(--accent-soft); color: var(--accent); }
.badge--soft { background: var(--surface-2); color: var(--muted); border: 1px solid var(--line); }
.pub h3 { margin: 0 0 6px; font-size: 16.5px; line-height: 1.4; font-weight: 500; }
.pub h3 b { font-weight: 700; }
.pub h3 img { display: inline-block; height: 1.3em; width: 1.3em; vertical-align: -.28em; margin-right: 4px; }
.pub__authors { margin: 0 0 10px; color: var(--muted); font-size: 14px; line-height: 1.55; }
.pub__authors strong { color: var(--text); }
.pub__authors a { color: inherit; text-decoration: underline; text-decoration-color: var(--line); text-underline-offset: 3px; }
.pub__authors a:hover { text-decoration-color: currentColor; }
.chips { display: flex; flex-wrap: wrap; gap: 8px; }
.chip {
  display: inline-flex; align-items: center; gap: 6px; padding: 3px 11px; border: 1px solid var(--line);
  border-radius: 999px; font-size: 13px; font-weight: 500; color: var(--text); background: var(--surface);
}
.chip:hover { border-color: var(--accent); color: var(--accent); text-decoration: none; }
.chip--soon { cursor: default; }
.chip--soon:hover { border-color: var(--line); color: var(--text); }

/* ---------- Demos ---------- */
.demos { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 16px; }
.demo {
  display: flex; flex-direction: column; gap: 8px; padding: 20px; border-radius: var(--radius);
  background: var(--surface); border: 1px solid var(--line); color: var(--text); text-align: left;
  font: inherit; cursor: pointer; transition: box-shadow .2s, border-color .2s;
}
.demo:hover { box-shadow: var(--shadow); border-color: var(--accent); text-decoration: none; }
.demo__top { display: flex; align-items: center; gap: 10px; }
.demo__icon { display: grid; place-items: center; width: 36px; height: 36px; border-radius: 10px; background: var(--accent-soft); color: var(--accent); font-size: 19px; }
.demo h3 { margin: 0; font-size: 16px; font-weight: 600; }
.demo p { margin: 0; color: var(--muted); font-size: 14.5px; line-height: 1.55; flex: 1; }
.demo__cta { display: inline-flex; align-items: center; gap: 6px; color: var(--accent); font-size: 14px; font-weight: 500; }
.status { margin-left: auto; font-size: 12px; font-weight: 500; color: var(--faint); display: inline-flex; align-items: center; gap: 6px; }
.status::before { content: ""; width: 7px; height: 7px; border-radius: 50%; background: #2fb36d; }
.status--soon::before { background: var(--faint); }

/* ---------- Experience ---------- */
.timeline { list-style: none; margin: 0; padding: 0; display: grid; gap: 12px; }
.timeline > li {
  display: grid; grid-template-columns: 96px 1fr; column-gap: 24px; row-gap: 4px;
  grid-template-rows: 1fr auto auto 1fr; align-items: center; padding: 16px 0;
}
.timeline > li + li { border-top: 1px solid var(--line); }
/* Logos are the focus here: large, transparent, no frame. */
/* Every logo sits in the same square slot, centered, with the text block centered beside it. */
.exp__logo { grid-row: 1 / -1; position: relative; width: 96px; height: 96px; display: grid; place-items: center; }
.exp__logo::before { content: attr(data-initial); font-weight: 700; font-size: 28px; color: var(--faint); }
.exp__logo:has(img)::before { content: none; }
.exp__logo img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: contain; object-position: center; }
.exp__head { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 2px 16px; }
.exp__head h3 { margin: 0; font-size: 16.5px; font-weight: 600; }
.exp__date { color: var(--faint); font-size: 14px; font-variant-numeric: tabular-nums; }
.exp__role { margin: 0; color: var(--muted); font-size: 14.5px; }

.subhead { margin: 40px 0 6px; font-size: 13px; font-weight: 600; letter-spacing: .08em; text-transform: uppercase; color: var(--faint); }
.canoe { margin-top: 12px; padding: 20px; border: 1px solid var(--line); border-radius: var(--radius); background: var(--surface); display: grid; gap: 18px; }
.canoe__head { display: flex; flex-wrap: wrap; align-items: flex-end; justify-content: space-between; gap: 12px 24px; }
.canoe__head h3 { margin: 0 0 4px; font-size: 16px; font-weight: 600; }
.canoe__head p { margin: 0; color: var(--muted); font-size: 14.5px; }
/* Video and 3D model stack on the left; the tall poster fills the same height on the right. */
.canoe__grid { display: grid; grid-template-columns: 5fr 4fr; grid-template-rows: auto auto; gap: 12px; }
.canoe figure { margin: 0; position: relative; border-radius: 10px; overflow: hidden; background: var(--surface-2); }
.canoe__video, .canoe__model { aspect-ratio: 960 / 590; }
.canoe__poster { grid-column: 2; grid-row: 1 / span 2; }
.canoe video, .canoe iframe, .canoe__poster img { position: absolute; inset: 0; width: 100%; height: 100%; border: 0; }
.canoe video { object-fit: cover; }
.canoe__poster img { object-fit: cover; object-position: top; }
.canoe figcaption {
  position: absolute; left: 8px; bottom: 8px; padding: 2px 8px; border-radius: 999px; pointer-events: none;
  background: rgba(0, 0, 0, .55); color: #fff; font-size: 11.5px; font-weight: 500;
}
.canoe__model figcaption { bottom: auto; top: 8px; }

/* ---------- Honors ---------- */
.honors { list-style: none; margin: 0; padding: 0; display: grid; gap: 10px; }
.honors li { display: grid; grid-template-columns: 20px 1fr; gap: 10px; font-size: 14px; }
.honors li::before { content: "✦"; color: var(--accent); font-size: 13px; padding-top: 2px; }
.honors em { color: var(--faint); font-style: normal; }

.foot { display: flex; justify-content: space-between; gap: 16px; padding: 28px 0 40px; margin-top: 8px; border-top: 1px solid var(--line); color: var(--faint); font-size: 13px; }

/* ---------- AI twin chat ---------- */
.chat-fab {
  position: fixed; right: 24px; bottom: 24px; z-index: 40; display: inline-flex; align-items: center; gap: 8px;
  padding: 12px 18px; border: 0; border-radius: 999px; background: var(--text); color: var(--bg);
  font: 600 14.5px var(--sans); box-shadow: 0 6px 24px rgba(0, 0, 0, .18); cursor: pointer; transition: transform .15s;
}
.chat-fab svg { font-size: 19px; }
.chat-fab:hover { transform: translateY(-2px); }
.chat-fab[aria-expanded="true"] { display: none; }
@media (min-width: 861px) { .chat-fab { display: none; } }
.chat-panel {
  position: fixed; right: 24px; bottom: 24px; z-index: 41; width: 400px; height: min(620px, calc(100vh - 48px));
  display: flex; flex-direction: column; background: var(--surface); border: 1px solid var(--line);
  border-radius: 18px; overflow: hidden; box-shadow: 0 20px 60px rgba(0, 0, 0, .25);
}
.chat-panel[hidden] { display: none; }
.chat-panel__bar { display: flex; align-items: center; gap: 8px; padding: 12px 12px 12px 16px; border-bottom: 1px solid var(--line); font-size: 14.5px; }
.chat-panel__bar strong { flex: 1; font-weight: 600; }
.chat-panel__dot { width: 8px; height: 8px; border-radius: 50%; background: #2fb36d; }
.chat-panel__btn { display: grid; place-items: center; width: 32px; height: 32px; border: 0; border-radius: 8px; background: transparent; color: var(--muted); cursor: pointer; font-size: 18px; }
.chat-panel__full { width: auto; padding: 0 10px; gap: 6px; display: inline-flex; align-items: center; font-size: 13px; font-weight: 500; }
.chat-panel__full svg { font-size: 16px; }
.chat-panel__btn:hover { background: var(--surface-2); color: var(--text); text-decoration: none; }
.chat-panel__frame { flex: 1; width: 100%; border: 0; background: var(--bg); }

/* ---------- Responsive ---------- */
@media (max-width: 1080px) {
  :root { --side-w: 220px; --gap: 40px; }
  .pub { grid-template-columns: 200px 1fr; }
}

@media (max-width: 860px) {
  html { scroll-padding-top: 64px; }
  .shell { display: block; padding: 28px 16px 0; }
  .side { display: contents; }
  .profile { display: flex; align-items: center; gap: 16px; }
  .profile__avatar { width: 88px; }
  .profile__name { font-size: 32px; margin: 0 0 4px; }
  .links { display: flex; flex-wrap: wrap; gap: 4px 16px; margin-top: 14px; }

  /* Contents becomes a sticky, swipeable bar */
  .toc {
    position: sticky; top: 0; z-index: 30; margin: 18px -16px 0; padding: 0;
    border-top: 0; border-bottom: 1px solid var(--line);
    background: color-mix(in srgb, var(--bg) 88%, transparent); backdrop-filter: blur(10px); -webkit-backdrop-filter: blur(10px);
  }
  .toc__label { display: none; }
  .toc__list { display: flex; gap: 4px; overflow-x: auto; padding: 8px 16px; scrollbar-width: none; }
  .toc__list::-webkit-scrollbar { display: none; }
  .toc__list a { border: 0; padding: 6px 12px; border-radius: 999px; white-space: nowrap; font-size: 14px; }
  .toc__list a::before { display: none; }
  .toc__list a.is-active { background: var(--text); color: var(--bg); font-weight: 500; }
  .theme-toggle { display: none; }
  .main { padding-top: 28px; }

  .pub { grid-template-columns: 1fr; gap: 14px; padding: 14px; }
  .demos { grid-template-columns: 1fr; }
  .timeline > li { grid-template-columns: 64px 1fr; column-gap: 16px; }
  .exp__logo { width: 64px; height: 64px; }
  .canoe { padding: 14px; }
  .canoe__grid { grid-template-columns: 1fr; }
  .canoe__poster { grid-column: auto; grid-row: auto; aspect-ratio: 960 / 1474; }
  .section__head { flex-direction: column; align-items: flex-start; gap: 4px; }
  .section__note { text-align: left; }
  .news li { grid-template-columns: 64px 1fr; gap: 10px; }
  .chat-fab { right: 16px; bottom: calc(16px + env(safe-area-inset-bottom, 0px)); padding: 14px; background: var(--accent); color: var(--bg); }
  .chat-fab span { display: none; }
  .chat-fab svg { font-size: 22px; }
  .chat-panel { inset: 0; width: auto; height: auto; border-radius: 0; border: 0; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  * { transition: none !important; }
}

.visually-hidden { position: absolute !important; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }
.pub__cover:not([data-anim]) { cursor: default; }
.timeline .exp__head { grid-column: 2; grid-row: 2; }
.timeline .exp__role { grid-column: 2; grid-row: 3; }