/* Shared styles for /about/ and /about/publications/.
   Palette and fonts follow the homepage (source/index.html). */
:root {
  --paper: #f6f0e6;
  --paper-deep: #ebe0cf;
  --surface: rgba(255, 255, 255, 0.62);
  --surface-strong: rgba(255, 255, 255, 0.86);
  --ink: #132238;
  --ink-soft: #2d3a4c;
  --muted: #5f6b7a;
  --line: rgba(19, 34, 56, 0.13);
  --gold: #8a6420;
  --gold-line: #b48a3a;
  --gold-soft: rgba(180, 138, 58, 0.14);
  --clay: #a85f3f;
  --sage: #5e7766;
  --nav-bg: rgba(246, 240, 230, 0.82);
  --shadow: 0 18px 50px rgba(37, 28, 15, 0.08);
  --header-font: "Cormorant Garamond", "Noto Serif SC", "Times New Roman", "Songti SC", serif;
  --body-font: "Inter", "Noto Sans SC", "Microsoft YaHei", system-ui, -apple-system, sans-serif;
  color-scheme: light;
}

[data-theme="dark"] {
  --paper: #11181f;
  --paper-deep: #0c1117;
  --surface: rgba(238, 242, 246, 0.045);
  --surface-strong: rgba(238, 242, 246, 0.09);
  --ink: #eef2f6;
  --ink-soft: #c7d0da;
  --muted: #9aa7b6;
  --line: rgba(238, 242, 246, 0.14);
  --gold: #e0bd78;
  --gold-line: #b48a3a;
  --gold-soft: rgba(216, 178, 102, 0.16);
  --clay: #cf8763;
  --sage: #8fb19a;
  --nav-bg: rgba(17, 24, 31, 0.84);
  --shadow: 0 18px 50px rgba(0, 0, 0, 0.35);
  color-scheme: dark;
}

*, *::before, *::after { box-sizing: border-box; }

html { scroll-behavior: smooth; scroll-padding-top: 88px; }

body {
  margin: 0;
  font-family: var(--body-font);
  font-size: 16px;
  line-height: 1.7;
  color: var(--ink-soft);
  background:
    radial-gradient(circle at 8% 4%, var(--gold-soft), transparent 26rem),
    linear-gradient(160deg, var(--paper) 0%, var(--paper) 55%, var(--paper-deep) 100%);
  background-attachment: fixed;
  min-height: 100vh;
}

a { color: var(--ink); text-decoration: none; }
a:hover { color: var(--clay); }
a:focus-visible, button:focus-visible { outline: 2px solid var(--gold-line); outline-offset: 3px; border-radius: 6px; }
strong { color: var(--ink); }

.wrap { width: min(920px, 100% - 40px); margin-inline: auto; }

.skip-link {
  position: absolute; left: 12px; top: -48px; z-index: 50;
  padding: 8px 14px; border-radius: 8px; background: var(--ink); color: var(--paper);
}
.skip-link:focus { top: 12px; }

/* ---------- Nav ---------- */

.site-nav {
  position: sticky; top: 0; z-index: 20;
  background: var(--nav-bg);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--line);
}
.nav-inner { display: flex; align-items: center; gap: 1rem; height: 60px; }
.brand { display: inline-flex; align-items: center; gap: 0.6rem; font-weight: 700; white-space: nowrap; }
.brand-mark {
  display: grid; place-items: center; width: 32px; height: 32px; border-radius: 50%;
  background: var(--ink); color: var(--paper); font-family: var(--header-font); font-size: 1rem;
}
.nav-links {
  display: flex; gap: 0.15rem; margin-left: auto; overflow-x: auto; scrollbar-width: none;
  -webkit-mask-image: linear-gradient(90deg, #000 90%, transparent);
  mask-image: linear-gradient(90deg, #000 90%, transparent);
}
.nav-links::-webkit-scrollbar { display: none; }
.nav-links a {
  padding: 0.4rem 0.7rem; border-radius: 999px; font-size: 0.9rem; color: var(--ink-soft); white-space: nowrap;
}
.nav-links a:hover, .nav-links a[aria-current="true"] { background: var(--surface-strong); color: var(--ink); }

.theme-toggle {
  display: grid; place-items: center; flex-shrink: 0; width: 36px; height: 36px; padding: 0;
  border: 1px solid var(--line); border-radius: 50%; background: var(--surface); color: var(--ink-soft); cursor: pointer;
}
.theme-toggle:hover { border-color: var(--gold-line); color: var(--ink); }
.theme-toggle svg { width: 17px; height: 17px; }
.theme-toggle .icon-moon { display: none; }
[data-theme="dark"] .theme-toggle .icon-sun { display: none; }
[data-theme="dark"] .theme-toggle .icon-moon { display: block; }

/* ---------- Sections ---------- */

section { padding: 4.5rem 0 0; }
.section-title {
  display: flex; align-items: baseline; gap: 0.8rem;
  margin: 0 0 1.6rem; font-family: var(--header-font); font-size: clamp(2rem, 4vw, 2.6rem);
  font-weight: 700; line-height: 1.1; color: var(--ink); letter-spacing: -0.01em;
}
.section-title::after { content: ""; flex: 1; height: 1px; background: var(--line); }
.section-note { margin: -1rem 0 1.4rem; color: var(--muted); font-size: 0.92rem; }

.eyebrow {
  margin: 0 0 0.8rem; color: var(--sage); font-size: 0.78rem; font-weight: 800;
  letter-spacing: 0.16em; text-transform: uppercase;
}

.tag {
  display: inline-block; padding: 2px 9px; border-radius: 999px;
  background: var(--surface-strong); border: 1px solid var(--line);
  font-size: 0.76rem; font-weight: 600; color: var(--ink-soft); white-space: nowrap;
}
.tag-strong { background: var(--gold-soft); border-color: transparent; color: var(--gold); }
.muted { color: var(--muted); }

.card {
  padding: 1.5rem 1.6rem; border: 1px solid var(--line); border-radius: 20px;
  background: var(--surface); box-shadow: var(--shadow);
}
.card h3 { margin: 0; font-size: 1.12rem; line-height: 1.35; color: var(--ink); }
.card-head { display: flex; justify-content: space-between; align-items: flex-start; gap: 1rem; }
.card-sub { margin: 0.35rem 0 0; font-weight: 500; }
.card-period { margin: 0.1rem 0 0.8rem; color: var(--muted); font-size: 0.88rem; }
.card-list { margin: 0; padding-left: 1.2rem; }
.card-list li + li { margin-top: 0.35rem; }
.card-links { display: flex; flex-wrap: wrap; gap: 1rem; margin-top: 1rem; padding-top: 0.9rem; border-top: 1px solid var(--line); font-weight: 600; }
.card-links a { color: var(--gold); }

.stack { display: grid; gap: 1rem; margin: 0; padding: 0; list-style: none; }

/* ---------- Profile ---------- */

.profile { padding-top: 4rem; }
.profile h1 {
  margin: 0; font-family: var(--header-font); font-size: clamp(3rem, 8vw, 4.6rem);
  line-height: 0.95; letter-spacing: -0.03em; color: var(--ink);
}
.alt-name { color: var(--clay); font-weight: 600; }
.affiliation { margin: 0.9rem 0 0; font-size: 1.12rem; font-weight: 600; color: var(--ink); }
.bio { max-width: 760px; margin: 1rem 0 0; }
.social-links { display: flex; flex-wrap: wrap; gap: 0.6rem; margin-top: 1.5rem; }
.social-links a {
  display: inline-flex; align-items: center; gap: 0.45rem; padding: 0.45rem 0.85rem;
  border: 1px solid var(--line); border-radius: 999px; background: var(--surface-strong);
  font-size: 0.9rem; font-weight: 600;
}
.social-links a:hover { border-color: var(--gold-line); }
.social-links svg { width: 17px; height: 17px; flex-shrink: 0; }

/* ---------- News / honors (timeline rows) ---------- */

.timeline { margin: 0; padding: 0; list-style: none; }
.news-item, .honor-item {
  display: grid; grid-template-columns: 84px 1fr; gap: 1rem;
  padding: 0.7rem 0; border-bottom: 1px solid var(--line);
}
.news-item time, .honor-item time { color: var(--gold); font-weight: 700; font-variant-numeric: tabular-nums; }
.honor-item { grid-template-columns: 84px 1fr auto; align-items: baseline; }
.honor-name { color: var(--ink); font-weight: 600; }
.honor-level { color: var(--muted); font-size: 0.9rem; text-align: right; }

/* ---------- Publications (compact list on /about/) ---------- */

.pub-list { margin: 0; padding: 0; list-style: none; }
.pub-item { display: grid; grid-template-columns: 56px 1fr; gap: 1rem; padding: 1rem 0; border-bottom: 1px solid var(--line); }
.pub-year { color: var(--muted); font-weight: 700; font-variant-numeric: tabular-nums; }
.pub-title { margin: 0; font-size: 1.04rem; line-height: 1.4; color: var(--ink); }
.pub-authors { margin-top: 0.2rem; font-size: 0.94rem; }
.pub-venue { color: var(--muted); font-size: 0.9rem; font-style: italic; }
.pub-meta { display: flex; flex-wrap: wrap; align-items: center; gap: 0.35rem; margin-top: 0.5rem; }
.pub-links { display: inline-flex; flex-wrap: wrap; gap: 0.4rem; }
.pub-links a, .pub-links button {
  padding: 2px 10px; border: 1px solid var(--line); border-radius: 999px; background: none;
  font: inherit; font-size: 0.8rem; font-weight: 600; color: var(--gold); cursor: pointer;
}
.pub-links a:hover, .pub-links button:hover { border-color: var(--gold-line); color: var(--ink); }
.more-link { display: inline-block; margin-top: 1rem; font-weight: 700; color: var(--gold); }

/* ---------- Projects / engagement ---------- */

.grid-2 { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 1rem; margin: 0; padding: 0; list-style: none; }
.project p { margin: 0.6rem 0 0.9rem; font-size: 0.95rem; }
.tags { display: flex; flex-wrap: wrap; gap: 0.35rem; }
.plain-list { margin: 0.7rem 0 0; padding: 0; list-style: none; }
.plain-list li { display: grid; padding: 0.55rem 0; border-bottom: 1px solid var(--line); font-size: 0.93rem; }
.plain-list li:last-child { border-bottom: 0; }
.plain-list strong { font-weight: 600; }
.plain-list span { color: var(--muted); font-size: 0.86rem; }

/* ---------- Show more ---------- */

.is-collapsed > .extra { display: none; }
.toggle-btn {
  display: block; margin: 1.2rem auto 0; padding: 0.45rem 1.2rem;
  border: 1px solid var(--line); border-radius: 999px; background: var(--surface-strong);
  font: inherit; font-size: 0.88rem; font-weight: 600; color: var(--ink-soft); cursor: pointer;
}
.toggle-btn:hover { border-color: var(--gold-line); color: var(--ink); }

/* ---------- Full publications page ---------- */

.page-head { padding: 4rem 0 0.5rem; }
.page-head h1 { margin: 0; font-family: var(--header-font); font-size: clamp(2.8rem, 7vw, 4rem); line-height: 1; color: var(--ink); }
.page-head p { margin: 0.8rem 0 0; color: var(--muted); }
.pub-cards { display: grid; gap: 1.2rem; padding: 2rem 0 0; }
.pub-card { display: grid; grid-template-columns: 220px 1fr; gap: 1.5rem; scroll-margin-top: 90px; }
.pub-card:target { border-color: var(--gold-line); }
.pub-card h2 { margin: 0; font-size: 1.2rem; line-height: 1.35; color: var(--ink); }
.pub-thumb {
  align-self: start; padding: 0; border: 1px solid var(--line); border-radius: 14px; overflow: hidden;
  background: #fff; cursor: zoom-in;
}
.pub-thumb img { display: block; width: 100%; height: auto; transition: transform 0.25s ease; }
.pub-thumb:hover img { transform: scale(1.03); }
.pub-abstract { margin: 0.8rem 0 0; font-size: 0.94rem; }
.pub-card .pub-links { margin-top: 0.9rem; }
.bibtex {
  margin: 0.9rem 0 0; padding: 0.9rem 1rem; border: 1px solid var(--line); border-radius: 12px;
  background: var(--surface-strong); font-size: 0.8rem; line-height: 1.55; white-space: pre-wrap; overflow-wrap: anywhere;
}

.lightbox { position: fixed; inset: 0; z-index: 100; display: grid; place-items: center; padding: 3vw; background: rgba(8, 12, 18, 0.88); border: 0; }
.lightbox[hidden] { display: none; }
.lightbox img { max-width: 100%; max-height: 92vh; border-radius: 10px; background: #fff; }
.lightbox-close {
  position: absolute; top: 14px; right: 18px; width: 44px; height: 44px; border: 0; border-radius: 50%;
  background: rgba(255, 255, 255, 0.14); color: #fff; font-size: 28px; line-height: 1; cursor: pointer;
}

/* ---------- Footer ---------- */

.site-footer { margin-top: 5rem; padding: 1.6rem 0 2.6rem; border-top: 1px solid var(--line); color: var(--muted); font-size: 0.9rem; }
.footer-inner { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 0.8rem; }
.footer-links { display: flex; flex-wrap: wrap; gap: 1rem; font-weight: 600; }
.footer-links a { color: var(--ink-soft); }

/* ---------- Mobile ---------- */

@media (max-width: 720px) {
  body { font-size: 15px; }
  .wrap { width: calc(100% - 28px); }
  .brand-name { display: none; }
  section { padding-top: 3.2rem; }
  .card { padding: 1.2rem; }
  .card-head { flex-direction: column; gap: 0.4rem; }
  .news-item, .honor-item { grid-template-columns: 1fr; gap: 0.1rem; }
  .honor-level { text-align: left; }
  .pub-item { grid-template-columns: 1fr; gap: 0.2rem; }
  .grid-2 { grid-template-columns: 1fr; }
  .pub-card { grid-template-columns: 1fr; }
  .pub-thumb { max-width: 420px; }
}

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

@media print {
  .site-nav, .toggle-btn, .theme-toggle, .skip-link { display: none !important; }
  .is-collapsed > .extra { display: revert; }
  body { background: #fff; }
  .card { box-shadow: none; }
}

/* "More" on /about/ publications: same look as the show-more buttons, links to the full list. */
.more-btn { width: fit-content; text-align: center; }