/* Jiawei Gu homepage. Tokens follow docs/superpowers/specs/2026-09-29-homepage-redesign-design.md */

@font-face {
  font-family: "ChillKai Name";
  src: url("../fonts/chillkai-name.woff2") format("woff2");
  font-display: swap;
}

:root {
  --bg: #faf8f3;
  --ink: #1f1d1a;
  --mute: #6b645a;
  --line: #e3ddd0;
  --line-2: #ece6da;
  --purple: #4b2e83;
  --gold: #c2a15a;          /* badges, hover accents */
  --gold-light: #e6d3a3;    /* link underline, hover fill */
  --gold-text: #a8842f;     /* slogan */
  --card-bg: #fff;          /* publication and talk cards */
  --tint: #fff;             /* card body tint */
  --serif: "Newsreader", Georgia, "Times New Roman", serif;
  --sans: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--serif);
  font-size: 16.5px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

img { display: block; max-width: 100%; }

a { color: var(--purple); text-decoration: none; }

details > summary { list-style: none; cursor: pointer; }
details > summary::-webkit-details-marker { display: none; }

.page {
  max-width: 1200px;
  margin: 0 auto;
  padding: 56px 56px 40px;
}

/* ---- prose links: purple text, light-gold underline, gold fill on hover ---- */
.prose a {
  color: var(--purple);
  border-bottom: 2px solid var(--gold-light);
  transition: background-color .15s;
}
.prose a:hover { background: var(--gold-light); }

/* ---- header ---- */
.hero {
  display: grid;
  grid-template-columns: 220px 1fr;
  gap: 46px;
  align-items: start;
  padding-bottom: 24px;
}

.hero-photo {
  width: 220px;
  height: 287px;
  object-fit: cover;
  border-radius: 12px;
}

.hero-name {
  margin: 6px 0 2px;
  font-size: 46px;
  font-weight: 500;
  line-height: 1.1;
  letter-spacing: -0.8px;
}

.hero-zh {
  font-family: "ChillKai Name", "Kaiti SC", "STKaiti", "KaiTi", serif;
  font-size: 0.55em;
  font-weight: 400;
  color: var(--mute);
  letter-spacing: 0;
  margin-left: 4px;
}

.hero-role { margin-top: 5px; font-size: 20.5px; color: var(--ink); }
.hero-role a { color: var(--purple); font-weight: 600; }
.hero-role a:hover { border-bottom: 2px solid var(--gold-light); }

.hero-motto {
  font-size: 22px;
  font-style: italic;
  color: var(--gold-text);
}

/* name + role on the left, slogan + icons on the right */
.hero-top {
  display: grid;
  grid-template-columns: 1fr auto;
  align-items: center;
  gap: 24px;
}
.hero-aside {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 12px;
  text-align: right;
}

.hero-links { display: flex; align-items: center; gap: 24px; }
.hero-links a {
  color: var(--purple);
  font-size: 29px;
  line-height: 1;
  padding: 2px;
  transition: color .15s, transform .15s;
}
.hero-links a:hover { color: var(--gold); transform: translateY(-1px); }

.hero-bio { margin: 22px 0 0; font-size: 19px; line-height: 1.7; }
.hero-bio p { margin: 0; }
.hero-bio p + p { margin-top: 12px; }

/* ---- sections ---- */
.section { margin-top: 56px; }

.label {
  display: flex;
  align-items: center;
  gap: 14px;
  margin: 0 0 18px;
  font-family: Georgia, "Times New Roman", serif;
  font-size: 22px;
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: -0.02em;
  color: var(--ink);
}
.label::before {
  content: "";
  flex: 0 0 4px;
  align-self: stretch;
  border-radius: 2px;
  background: var(--purple);
}


.row {
  display: grid;
  grid-template-columns: 96px 1fr;
  gap: 8px;
  padding: 4px 0;
  font-size: 16px;
  line-height: 1.6;
}

.row-date {
  padding-top: 1px;
  font-family: var(--sans);
  font-size: 14.5px;
  color: var(--mute);
}

.note { color: var(--mute); font-size: 13.5px; }

.more > summary {
  padding: 6px 0 2px 104px;
  font-family: var(--sans);
  font-size: 12px;
  color: var(--purple);
}
.more > summary::after { content: " \203A"; }
.more[open] > summary { display: none; }

/* ---- publications ---- */
.pub {
  display: grid;
  grid-template-columns: 150px 1fr;
  gap: 20px;
  padding: 12px 0;
}

/* Selected publications: two-column cards, big image, overlay label */
.featured {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 28px;
  margin-top: 18px;
}
.feature-card {
  display: flex;
  flex-direction: column;
  overflow: hidden;
  background: var(--card-bg);
  border: 1px solid var(--line);
  border-radius: 12px;
  transition: border-color .2s, transform .2s;
}
.feature-card:hover { border-color: var(--gold); transform: translateY(-2px); }
.feature-media { position: relative; background: #fff; }
.feature-media img { width: 100%; height: 200px; object-fit: cover; object-position: top; }
.feature-label {
  position: absolute;
  top: 16px;
  left: 16px;
  max-width: calc(100% - 32px);
  padding: 7px 18px;
  border-radius: 25px;
  background: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
  color: #fff;
  font-family: var(--sans);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: .5px;
  text-transform: uppercase;
  box-shadow: 0 4px 12px rgba(0, 0, 0, .2);
}

.feature-body {
  background: var(--tint);
  display: flex;
  flex-direction: column;
  gap: 6px;
  flex: 1;
  padding: 20px 24px 22px;
}
.feature-body .pub-title { font-size: 19px; font-weight: 600; line-height: 1.35; }
.feature-body .pub-title a { color: var(--ink); }
.feature-body .pub-title a:hover { color: var(--purple); }
.feature-body .pub-authors { font-size: 15.5px; line-height: 1.55; }
.feature-body .tldr p { font-size: 15.5px; font-style: italic; line-height: 1.55; color: var(--mute); }
.feature-body .pub-meta { margin-top: auto; padding-top: 12px; }

.pub-note { margin: -12px 0 6px; font-size: 14px; font-style: italic; color: var(--mute); }

/* All Publications: the heading itself toggles the list */
.all-pubs > summary.label { cursor: pointer; margin-bottom: 0; }
.all-pubs[open] > summary.label { margin-bottom: 18px; }
.all-pubs > summary.label::after {
  content: "";
  width: 8px;
  height: 8px;
  margin-left: 2px;
  border-right: 2px solid var(--mute);
  border-bottom: 2px solid var(--mute);
  transform: rotate(-45deg);
  transition: transform .2s;
}
.all-pubs[open] > summary.label::after { transform: rotate(45deg) translate(-2px, -2px); }
.all-pubs > summary.label:hover::after { border-color: var(--purple); }

.pub-compact { grid-template-columns: 190px 1fr; gap: 24px; padding: 14px 0; }
.pub-compact .pub-thumb { width: 190px; height: 118px; }
.pub-compact .pub-title { font-size: 16px; }

.pub-thumb {
  width: 150px;
  height: 92px;
  object-fit: cover;
  object-position: top;
  border: 1px solid var(--line);
  background: #fff;
}

.pub-title { font-size: 16.5px; font-weight: 500; line-height: 1.35; }
.pub-title a { color: var(--ink); }
.pub-title a:hover { color: var(--purple); }

.pub-authors { margin-top: 3px; font-size: 14.5px; color: var(--mute); }
.au-full { display: none; }
.pub-authors.open .au-short { display: none; }
.pub-authors.open .au-full { display: inline; }
.au-more {
  padding: 0 6px;
  border: none;
  border-radius: 4px;
  background: var(--line-2);
  color: var(--purple);
  font: inherit;
  font-size: .9em;
  cursor: pointer;
}
.au-more:hover { background: var(--gold-light); }
.pub-authors b { color: var(--purple); font-weight: 700; font-size: 1.08em; }

.pub-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 6px 12px;
  margin-top: 7px;
  font-family: var(--sans);
}

/* Venue as italic gold text; Oral and awards in red (no boxes) */
.venue { font-family: var(--serif); font-size: 15.5px; font-style: italic; color: var(--gold-text); }
.venue-hl { font-family: var(--serif); font-size: 15.5px; font-weight: 600; color: #b3261e; }

.pub-link {
  font-family: var(--serif);
  font-size: 15.5px;
  color: var(--purple);
}
.pub-link:first-of-type { margin-left: 6px; }
.pub-link:hover { color: var(--ink); }

.tldr > summary { margin-top: 5px; font-family: var(--sans); font-size: 11px; color: var(--mute); }
.tldr > summary::before { content: "+ "; }
.tldr[open] > summary::before { content: "\2212  "; }
.tldr p { margin: 4px 0 0; font-size: 15px; color: #3d3a35; }

/* ---- talks carousel (behaviour from the previous site, restyled) ---- */
.talks { position: relative; }

.talks-grid {
  display: flex;
  gap: 24px;
  overflow-x: auto;
  scroll-behavior: smooth;
  scroll-snap-type: x mandatory;
  scrollbar-width: none;
  padding: 8px 0 12px;
}
.talks-grid::-webkit-scrollbar { display: none; }
.talks-grid::before,
.talks-grid::after { content: ""; flex: 0 0 calc((100% - 460px) / 2); }

.talk-card {
  flex: 0 0 460px;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  background: var(--card-bg);
  border: 1px solid var(--line);
  border-radius: 10px;
  color: inherit;
  scroll-snap-align: center;
  scroll-snap-stop: always;
  opacity: .55;
  transition: opacity .4s, border-color .4s, transform .4s;
}
.talk-card.active { opacity: 1; border-color: var(--gold); }
.talk-card:hover { transform: translateY(-3px); }

.talk-image { width: 100%; height: 250px; object-fit: cover; background: var(--line-2); }

.talk-body { padding: 18px 22px 22px; background: var(--tint); }
.talk-venue { font-size: 15px; font-weight: 600; color: var(--purple); }
.talk-title { margin-top: 6px; font-size: 18.5px; font-weight: 600; line-height: 1.35; color: var(--ink); }
.talk-desc { margin-top: 6px; font-size: 15.5px; font-style: italic; line-height: 1.55; color: var(--mute); }

.talks-nav {
  position: absolute;
  top: 125px;
  z-index: 2;
  width: 40px;
  height: 40px;
  display: grid;
  place-items: center;
  border: 1px solid var(--line);
  border-radius: 50%;
  background: rgba(255, 255, 255, .92);
  color: var(--purple);
  font-size: 14px;
  cursor: pointer;
  transform: translateY(-50%);
  transition: background .15s, color .15s;
}
.talks-nav:hover { background: var(--purple); color: #fff; }
.talks-nav.prev { left: -8px; }
.talks-nav.next { right: -8px; }

/* ---- footer ---- */
.footer {
  margin-top: 48px;
  font-family: var(--sans);
  font-size: 11px;
  color: #9a9387;
}

/* ---- phones ---- */
@media (max-width: 720px) {
  .page { padding: 32px 16px 32px; }
  .hero { grid-template-columns: 1fr; gap: 24px; }
  .hero-photo { width: 100%; max-width: 260px; height: auto; aspect-ratio: 600 / 784; margin: 0 auto; }
  .hero-name { font-size: 36px; }
  .hero-top { grid-template-columns: 1fr; gap: 12px; }
  .hero-aside { align-items: flex-start; text-align: left; }
  .row { grid-template-columns: 1fr; gap: 0; }
  .more > summary { padding-left: 0; }
  .pub { grid-template-columns: 1fr; gap: 10px; }
  .featured { grid-template-columns: 1fr; }
  .feature-media img { height: 170px; }
  .pub-thumb { width: 100%; height: 160px; }
  .pub-compact { grid-template-columns: 1fr; }
  .pub-compact .pub-thumb { width: 100%; height: 170px; }
  .talks-grid::before,
  .talks-grid::after { flex-basis: 0; }
  .talk-card { flex-basis: 85%; }
  .talk-image { height: 180px; }
  .talks-nav { display: none; }
}