/* ==========================================================================
   Shuang Liu — academic homepage
   Design system: warm-navy academic theme, light + dark, bilingual (EN/中文)
   ========================================================================== */

:root {
  --bg: #f5f6fa;
  --bg-soft: #eef1f7;
  --surface: #ffffff;
  --surface-2: #fbfaf7;
  --border: #e3e7ef;
  --border-soft: #ecedf3;

  --text: #1b2330;
  --text-muted: #5c6474;
  --text-faint: #8a92a3;

  --navy: #12305c;
  --navy-strong: #0a1f40;
  --navy-soft: #e9edf6;
  --gold: #a9762f;
  --gold-strong: #8a5f22;
  --gold-soft: #f6ecd9;

  --badge-a-fg: #8a5f22;
  --badge-a-bg: #f6ecd9;
  --badge-b-fg: #2b5fad;
  --badge-b-bg: #e7eefb;
  --badge-c-fg: #5c6474;
  --badge-c-bg: #eef1f7;
  --badge-t1-fg: #8f2f52;
  --badge-t1-bg: #fbe8ef;

  --shadow-sm: 0 1px 2px rgba(15, 23, 42, .05);
  --shadow-md: 0 10px 30px -12px rgba(15, 23, 42, .16);
  --shadow-lg: 0 24px 60px -20px rgba(15, 23, 42, .28);

  --radius-sm: 10px;
  --radius-md: 16px;
  --radius-lg: 22px;

  --font-sans: "Inter", -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  --font-serif: "Source Serif 4", "Noto Serif SC", Georgia, "Songti SC", serif;

  --header-h: 68px;
  --container-w: 1120px;

  color-scheme: light;
}

:root[data-theme="dark"] {
  color-scheme: dark;
  --bg: #0a0f1a;
  --bg-soft: #0d1424;
  --surface: #121a2c;
  --surface-2: #101827;
  --border: #223049;
  --border-soft: #1b2739;

  --text: #e8eaf0;
  --text-muted: #a6aec0;
  --text-faint: #717c92;

  --navy: #8fb3ee;
  --navy-strong: #bcd4f7;
  --navy-soft: #17233c;
  --gold: #e3b768;
  --gold-strong: #f0cd8c;
  --gold-soft: #2a2213;

  --badge-a-fg: #f0cd8c;
  --badge-a-bg: #2a2213;
  --badge-b-fg: #9cc0f5;
  --badge-b-bg: #14213a;
  --badge-c-fg: #a6aec0;
  --badge-c-bg: #182233;
  --badge-t1-fg: #f0a9c4;
  --badge-t1-bg: #2a1622;

  --shadow-sm: 0 1px 2px rgba(0, 0, 0, .4);
  --shadow-md: 0 10px 30px -12px rgba(0, 0, 0, .55);
  --shadow-lg: 0 24px 60px -20px rgba(0, 0, 0, .7);
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #0a0f1a;
    --bg-soft: #0d1424;
    --surface: #121a2c;
    --surface-2: #101827;
    --border: #223049;
    --border-soft: #1b2739;

    --text: #e8eaf0;
    --text-muted: #a6aec0;
    --text-faint: #717c92;

    --navy: #8fb3ee;
    --navy-strong: #bcd4f7;
    --navy-soft: #17233c;
    --gold: #e3b768;
    --gold-strong: #f0cd8c;
    --gold-soft: #2a2213;

    --badge-a-fg: #f0cd8c;
    --badge-a-bg: #2a2213;
    --badge-b-fg: #9cc0f5;
    --badge-b-bg: #14213a;
    --badge-c-fg: #a6aec0;
    --badge-c-bg: #182233;
    --badge-t1-fg: #f0a9c4;
    --badge-t1-bg: #2a1622;

    --shadow-sm: 0 1px 2px rgba(0, 0, 0, .4);
    --shadow-md: 0 10px 30px -12px rgba(0, 0, 0, .55);
    --shadow-lg: 0 24px 60px -20px rgba(0, 0, 0, .7);
  }
}

/* ---- reset ------------------------------------------------------------ */
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
html.no-js body { visibility: hidden; }
html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--text);
}
body {
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  transition: background-color .25s ease, color .25s ease;
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
ul { margin: 0; padding: 0; list-style: none; }
h1, h2, h3, h4 { margin: 0; font-weight: 600; }
p { margin: 0; }
button { font-family: inherit; }
:focus-visible { outline: 2px solid var(--gold); outline-offset: 2px; }
::selection { background: var(--gold-soft); color: var(--gold-strong); }

.container {
  width: 100%;
  max-width: var(--container-w);
  margin: 0 auto;
  padding: 0 28px;
}

/* ---- skip link --------------------------------------------------------- */
.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  background: var(--navy);
  color: #fff;
  padding: 10px 16px;
  border-radius: 0 0 8px 0;
  z-index: 200;
}
.skip-link:focus { left: 0; }

/* ---- header / nav ------------------------------------------------------ */
.site-header {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  height: var(--header-h);
  display: flex;
  align-items: center;
  background: color-mix(in srgb, var(--surface) 82%, transparent);
  backdrop-filter: saturate(160%) blur(14px);
  -webkit-backdrop-filter: saturate(160%) blur(14px);
  border-bottom: 1px solid transparent;
  transition: border-color .25s ease, box-shadow .25s ease;
}
.site-header.is-scrolled {
  border-bottom-color: var(--border);
  box-shadow: var(--shadow-sm);
}
.site-header .container {
  display: flex;
  align-items: center;
  gap: 20px;
}
.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-right: auto;
  font-weight: 600;
  letter-spacing: .01em;
  white-space: nowrap;
}
.brand-mark {
  width: 34px; height: 34px;
  border-radius: 10px;
  background: linear-gradient(155deg, var(--navy) 0%, #274a80 100%);
  color: #fff;
  display: flex; align-items: center; justify-content: center;
  font-family: var(--font-serif);
  font-size: 15px;
  font-weight: 600;
  flex-shrink: 0;
}
.brand-name { font-size: 15px; color: var(--text); }
.brand-name small { display: block; font-size: 11px; font-weight: 400; color: var(--text-faint); }

.main-nav { display: flex; }
.main-nav ul { display: flex; gap: 4px; }
.main-nav a {
  display: block;
  padding: 8px 12px;
  border-radius: 999px;
  font-size: 13.5px;
  font-weight: 500;
  color: var(--text-muted);
  transition: background .2s ease, color .2s ease;
  white-space: nowrap;
}
.main-nav a:hover { color: var(--text); background: var(--bg-soft); }
.main-nav a.is-active { color: var(--navy); background: var(--navy-soft); }
.main-nav a.nav-highlight, .mobile-nav a.nav-highlight {
  color: var(--gold-strong);
  font-weight: 700;
}
.main-nav a.nav-highlight:hover { color: var(--gold-strong); background: var(--gold-soft); }
.main-nav a.nav-highlight.is-active { color: var(--gold-strong); background: var(--gold-soft); }

.header-tools { display: flex; align-items: center; gap: 8px; flex-shrink: 0; }

.lang-switch {
  display: inline-flex;
  gap: 2px;
  padding: 3px;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: var(--bg-soft);
}
.lang-switch button {
  border: 0; background: transparent; cursor: pointer;
  padding: 5px 11px; border-radius: 999px;
  font-size: 12.5px; color: var(--text-muted);
  transition: background .18s ease, color .18s ease;
}
.lang-switch button.is-active { background: var(--surface); color: var(--navy); font-weight: 600; box-shadow: var(--shadow-sm); }

.icon-btn {
  width: 34px; height: 34px;
  display: inline-flex; align-items: center; justify-content: center;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: var(--bg-soft);
  color: var(--text-muted);
  cursor: pointer;
  transition: background .18s ease, color .18s ease, transform .18s ease;
}
.icon-btn:hover { color: var(--navy); }
.icon-btn svg { width: 16px; height: 16px; }
.theme-toggle .sun { display: none; }
:root[data-theme="dark"] .theme-toggle .sun { display: block; }
:root[data-theme="dark"] .theme-toggle .moon { display: none; }
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) .theme-toggle .sun { display: block; }
  :root:not([data-theme="light"]) .theme-toggle .moon { display: none; }
}

.nav-toggle { display: none; }

@media (max-width: 880px) {
  .main-nav { display: none; }
  .nav-toggle { display: inline-flex; }
  .mobile-nav {
    position: fixed;
    inset: var(--header-h) 0 0 0;
    background: var(--surface);
    z-index: 99;
    padding: 12px 20px 32px;
    overflow-y: auto;
    transform: translateY(-8px);
    opacity: 0;
    pointer-events: none;
    transition: opacity .2s ease, transform .2s ease;
  }
  .mobile-nav.is-open { opacity: 1; transform: translateY(0); pointer-events: auto; }
  .mobile-nav ul { display: flex; flex-direction: column; gap: 2px; }
  .mobile-nav a {
    display: block; padding: 13px 8px; font-size: 15.5px; font-weight: 500;
    color: var(--text); border-bottom: 1px solid var(--border-soft);
  }
}
@media (min-width: 881px) { .mobile-nav { display: none; } }

/* ---- news ticker -------------------------------------------------------- */
.news-bar {
  margin-top: var(--header-h);
  background: var(--navy-soft);
  border-bottom: 1px solid var(--border);
}
.news-bar .container {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding-top: 10px;
  padding-bottom: 10px;
  font-size: 13.5px;
  flex-wrap: wrap;
}
.news-tag {
  flex-shrink: 0;
  display: inline-flex; align-items: center; gap: 6px;
  font-weight: 700; letter-spacing: .06em; text-transform: uppercase;
  font-size: 11px; color: var(--navy);
}
.news-tag::before {
  content: ""; width: 6px; height: 6px; border-radius: 50%;
  background: var(--gold); display: inline-block;
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--gold) 25%, transparent);
}
.news-bar ul { display: flex; flex-direction: column; gap: 2px; }
.news-bar li { color: var(--text-muted); }
.news-bar li b { color: var(--text); }

/* ---- hero --------------------------------------------------------------- */
.hero {
  position: relative;
  overflow: hidden;
  padding: 64px 0 56px;
  background:
    radial-gradient(680px 420px at 88% -10%, color-mix(in srgb, var(--gold) 14%, transparent), transparent 60%),
    radial-gradient(760px 520px at -10% 0%, color-mix(in srgb, var(--navy) 16%, transparent), transparent 60%);
}
.hero .container {
  display: grid;
  grid-template-columns: 224px 1fr;
  grid-template-areas:
    "photo right"
    "bio   bio"
    "stats stats";
  column-gap: 44px;
  row-gap: 28px;
  align-items: start;
}
.hero-portrait {
  grid-area: photo;
  position: relative;
  width: 100%; aspect-ratio: 1 / 1;
  justify-self: start;
}
.hero-portrait img {
  width: 100%; height: 100%;
  border-radius: 26px;
  object-fit: cover;
  box-shadow: var(--shadow-lg);
  border: 1px solid var(--border);
}
.hero-portrait::after {
  content: "";
  position: absolute;
  inset: -10px;
  border-radius: 32px;
  border: 1px dashed color-mix(in srgb, var(--gold) 55%, transparent);
  z-index: -1;
}
.hero-name {
  font-family: var(--font-serif);
  font-size: clamp(30px, 4vw, 42px);
  line-height: 1.15;
  color: var(--text);
  letter-spacing: -0.01em;
}
.hero-affiliation {
  margin-top: 8px;
  font-size: 16px;
  color: var(--text-muted);
}
.role-pills {
  display: flex; flex-wrap: wrap; gap: 8px;
  margin-top: 16px;
}
.role-pill {
  font-size: 12.5px; font-weight: 600;
  padding: 5px 12px;
  border-radius: 999px;
  background: var(--surface);
  border: 1px solid var(--border);
  color: var(--navy);
}
.role-pill.is-accent {
  background: var(--gold-soft);
  border-color: color-mix(in srgb, var(--gold) 35%, var(--border));
  color: var(--gold-strong);
}
.hero-right { grid-area: right; }
.scholar-links { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 18px; }
.pill-link {
  display: inline-flex; align-items: center; gap: 7px;
  padding: 8px 15px;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--navy);
  font-size: 13.5px; font-weight: 500;
  box-shadow: var(--shadow-sm);
  transition: transform .16s ease, box-shadow .16s ease, border-color .16s ease;
}
.pill-link:hover { transform: translateY(-2px); box-shadow: var(--shadow-md); border-color: color-mix(in srgb, var(--navy) 30%, var(--border)); }
.pill-link svg { width: 15px; height: 15px; flex-shrink: 0; }

.hero-bio {
  grid-area: bio;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 26px 28px;
  box-shadow: var(--shadow-sm);
}
.hero-bio-heading {
  font-size: 11px;
  font-weight: 700;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--gold-strong);
  margin-bottom: 10px;
}
.hero-bio p {
  color: var(--text-muted);
  font-size: 15px;
  line-height: 1.75;
}

.stat-row {
  grid-area: stats;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 12px;
}
.stat-tile {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 16px 14px;
  text-align: center;
  box-shadow: var(--shadow-sm);
}
.stat-num {
  font-family: var(--font-serif);
  font-size: 24px;
  color: var(--navy);
  font-weight: 600;
}
.stat-label {
  margin-top: 4px;
  font-size: 11.5px;
  color: var(--text-muted);
  line-height: 1.3;
}

@media (max-width: 760px) {
  .hero .container {
    grid-template-columns: 1fr;
    grid-template-areas:
      "photo"
      "right"
      "bio"
      "stats";
    row-gap: 22px;
  }
  .hero-portrait { width: 132px; aspect-ratio: 1 / 1; justify-self: start; }
  .stat-row { grid-template-columns: repeat(2, 1fr); }
}

/* ---- admissions banner --------------------------------------------------- */
.admissions { padding: 8px 0 36px; }
.admissions-card {
  /* Fixed (theme-independent) deep-navy banner -- the light/dark --navy
     tokens intentionally invert to a *light* accent colour in dark mode,
     which would turn this into a pale card there, so this banner uses its
     own constant colours rather than the theme tokens. */
  position: relative;
  overflow: hidden;
  border-radius: var(--radius-lg);
  padding: 22px 30px;
  background: linear-gradient(120deg, #0a1f40, #12305c 65%);
  box-shadow: var(--shadow-lg);
}
.admissions-head {
  position: relative;
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px 16px;
}
.admissions-card::after {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(420px 220px at 92% 0%, rgba(201, 154, 74, .4), transparent 65%);
  pointer-events: none;
}
.admissions-eyebrow {
  position: relative;
  display: inline-flex;
  align-items: center;
  gap: 7px;
  font-size: 11.5px;
  font-weight: 700;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: #f6ecd9;
  background: rgba(201, 154, 74, .32);
  border: 1px solid rgba(201, 154, 74, .55);
  padding: 5px 13px;
  border-radius: 999px;
}
.admissions-eyebrow::before {
  content: "";
  width: 6px; height: 6px; border-radius: 50%;
  background: #d9a765;
  box-shadow: 0 0 0 3px rgba(201, 154, 74, .35);
}
.admissions-title {
  font-family: var(--font-serif);
  font-size: clamp(20px, 2.4vw, 25px);
  font-weight: 700;
  color: #fff;
  letter-spacing: -.01em;
}
.admissions-text {
  position: relative;
  margin-top: 12px;
  font-size: 15px;
  line-height: 1.7;
  color: rgba(255, 255, 255, .84);
}
@media (max-width: 640px) {
  .admissions-card { padding: 24px 22px; }
}

/* ---- generic section chrome --------------------------------------------- */
main { position: relative; }
.section { padding: 76px 0; border-top: 1px solid var(--border-soft); }
.section:first-of-type { border-top: none; }
.section-head { margin-bottom: 36px; max-width: 640px; }
.section-eyebrow {
  font-size: 11.5px; font-weight: 700; letter-spacing: .12em; text-transform: uppercase;
  color: var(--gold-strong);
  margin-bottom: 8px;
  display: block;
}
.section-title {
  font-family: var(--font-serif);
  font-size: clamp(24px, 3vw, 30px);
  color: var(--text);
}
.section-desc { margin-top: 10px; color: var(--text-muted); font-size: 14.5px; }

.layout-split {
  display: grid;
  grid-template-columns: minmax(0,1fr) minmax(0,1fr);
  gap: 40px;
}
@media (max-width: 860px) { .layout-split { grid-template-columns: 1fr; gap: 48px; } }

.subhead {
  font-size: 13px; font-weight: 700; text-transform: uppercase; letter-spacing: .08em;
  color: var(--text-faint);
  margin-bottom: 18px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--border-soft);
}

/* ---- timeline (experience / education) ---------------------------------- */
.timeline { position: relative; padding-left: 26px; }
.timeline::before {
  content: ""; position: absolute; left: 5px; top: 6px; bottom: 6px; width: 1px;
  background: var(--border);
}
.timeline > li { position: relative; padding-bottom: 26px; }
.timeline > li:last-child { padding-bottom: 0; }
.timeline > li::before {
  content: ""; position: absolute; left: -26px; top: 5px; width: 11px; height: 11px;
  border-radius: 50%; background: var(--surface); border: 2px solid var(--navy);
}
.timeline > li b {
  display: block; font-size: 15.5px; color: var(--text); font-weight: 600;
}
.timeline > li span {
  display: inline-block; margin-top: 3px; font-size: 12.5px; color: var(--gold-strong); font-weight: 600;
}
.timeline > li p {
  margin-top: 4px; font-size: 14px; color: var(--text-muted);
}

/* ---- card grids (services / honors / projects / patents / teaching) ----- */
.card-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 14px; }
.card-grid.cols-3 { grid-template-columns: repeat(3, 1fr); }
@media (max-width: 760px) { .card-grid, .card-grid.cols-3 { grid-template-columns: 1fr; } }

.card-grid > li {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 18px 20px;
  box-shadow: var(--shadow-sm);
  transition: transform .16s ease, box-shadow .16s ease, border-color .16s ease;
}
.card-grid > li:hover { transform: translateY(-3px); box-shadow: var(--shadow-md); border-color: color-mix(in srgb, var(--navy) 22%, var(--border)); }
.card-grid > li b {
  display: block; font-size: 15px; font-weight: 600; color: var(--text); line-height: 1.4;
}
.card-grid > li span {
  display: inline-block; margin-top: 6px; font-size: 12px; font-weight: 600; color: var(--gold-strong);
  background: var(--gold-soft); padding: 2px 9px; border-radius: 999px;
}
.card-grid > li p {
  margin-top: 8px; font-size: 13.5px; color: var(--text-muted); line-height: 1.55;
}

.honors-list { display: flex; flex-direction: column; gap: 10px; }
.honors-list > li {
  display: grid;
  grid-template-columns: 20px minmax(0, 1fr) auto;
  column-gap: 12px;
  row-gap: 4px;
  align-items: start;
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius-md);
  padding: 14px 18px; box-shadow: var(--shadow-sm);
}
.honors-list > li::before {
  content: "\1F3C6";
  grid-row: 1;
  grid-column: 1;
  font-size: 16px; line-height: 1.4;
  filter: saturate(1.15);
}
.honors-list > li > b {
  grid-row: 1; grid-column: 2;
  font-size: 14.5px; font-weight: 600; color: var(--text);
}
.honors-list > li > span {
  grid-row: 1; grid-column: 3;
  font-size: 12px; font-weight: 700; color: var(--navy);
  background: var(--navy-soft); padding: 3px 10px; border-radius: 999px; white-space: nowrap;
}
.honors-list > li > p {
  grid-row: 2; grid-column: 2 / -1;
  font-size: 13px; color: var(--text-muted);
}

.patents-list { display: flex; flex-direction: column; gap: 10px; }
.patents-list > li {
  display: grid; grid-template-columns: 1fr auto; gap: 4px 16px; align-items: baseline;
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius-md);
  padding: 14px 18px; box-shadow: var(--shadow-sm);
}
.patents-list > li > p { grid-column: 1 / -1; font-size: 14.5px; font-weight: 600; color: var(--text); order: -1; }
.patents-list > li > b { font-size: 13px; color: var(--text-muted); font-weight: 500; }
.patents-list > li > span {
  font-family: "SFMono-Regular", ui-monospace, Menlo, Consolas, monospace;
  font-size: 11.5px; color: var(--gold-strong); background: var(--gold-soft);
  padding: 2px 8px; border-radius: 6px; white-space: nowrap; justify-self: end;
}

.project-list { display: flex; flex-direction: column; gap: 10px; }
.project-list > li {
  display: grid; grid-template-columns: minmax(0, 1fr) auto; column-gap: 16px; row-gap: 4px;
  align-items: baseline;
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius-md);
  padding: 14px 18px; box-shadow: var(--shadow-sm);
}
.project-list > li > b {
  font-size: 14.5px; font-weight: 600; color: var(--text); line-height: 1.4;
}
.project-list > li > span {
  font-size: 12px; font-weight: 600; color: var(--gold-strong);
  background: var(--gold-soft); padding: 2px 9px; border-radius: 999px; white-space: nowrap; justify-self: end;
}
.project-list > li > p {
  grid-column: 1 / -1; font-size: 13px; color: var(--text-muted);
}
@media (max-width: 640px) {
  .project-list > li { grid-template-columns: 1fr; }
  .project-list > li > span { justify-self: start; }
}

.teach-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 16px; }
@media (max-width: 760px) { .teach-grid { grid-template-columns: 1fr; } }
.teach-grid > li {
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius-lg);
  padding: 22px 24px; box-shadow: var(--shadow-sm);
}
.teach-grid > li::before { content: "\1F393"; font-size: 20px; }
.teach-grid > li b { display: block; margin-top: 10px; font-size: 17px; font-weight: 600; color: var(--text); }
.teach-grid > li p { margin-top: 6px; font-size: 13.5px; color: var(--text-muted); }

/* ---- publications -------------------------------------------------------- */
.pub-toolbar {
  display: flex; flex-wrap: wrap; align-items: center; gap: 12px;
  margin-bottom: 22px;
}
.pub-tabs { display: inline-flex; gap: 3px; padding: 3px; background: var(--bg-soft); border: 1px solid var(--border); border-radius: 999px; }
.pub-tabs button {
  border: 0; background: transparent; cursor: pointer; padding: 8px 16px; border-radius: 999px;
  font-size: 13px; font-weight: 600; color: var(--text-muted);
}
.pub-tabs button.is-active { background: var(--surface); color: var(--navy); box-shadow: var(--shadow-sm); }

.pub-search { position: relative; margin-left: auto; }
.pub-search svg { position: absolute; left: 12px; top: 50%; transform: translateY(-50%); width: 15px; height: 15px; color: var(--text-faint); }
.pub-search input {
  width: 220px;
  padding: 9px 14px 9px 34px;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text);
  font-size: 13.5px;
}
.pub-search input:focus { border-color: var(--navy); }

.pub-filters { display: flex; flex-wrap: wrap; gap: 6px; margin-bottom: 22px; }
.pub-filters button {
  border: 1px solid var(--border); background: var(--surface); cursor: pointer;
  padding: 6px 13px; border-radius: 999px; font-size: 12.5px; font-weight: 600; color: var(--text-muted);
  transition: all .15s ease;
}
.pub-filters button.is-active { background: var(--navy); border-color: var(--navy); color: #fff; }
.pub-count { font-size: 12.5px; color: var(--text-faint); margin-bottom: 14px; }

.pub-list { display: flex; flex-direction: column; gap: 12px; }
.pub-list > li {
  background: var(--surface);
  border: 1px solid var(--border);
  border-left: 3px solid var(--border);
  border-radius: var(--radius-md);
  padding: 16px 20px;
  font-size: 14.5px;
  box-shadow: var(--shadow-sm);
  transition: border-left-color .15s ease, transform .15s ease, box-shadow .15s ease;
}
.pub-list > li:hover { transform: translateX(2px); box-shadow: var(--shadow-md); }
.pub-list > li[data-rank="A"] { border-left-color: var(--badge-a-fg); }
.pub-list > li[data-rank="B"] { border-left-color: var(--badge-b-fg); }
.pub-list > li[data-rank="C"] { border-left-color: var(--badge-c-fg); }
.pub-list > li[data-rank="T1"] { border-left-color: var(--badge-t1-fg); }
.pub-list > li.is-hidden { display: none; }

.pub-list > li > span:first-child {
  font-size: 12px; font-weight: 700; color: var(--navy);
  background: var(--navy-soft); padding: 2px 9px; border-radius: 999px;
  margin-right: 8px; display: inline-block; margin-bottom: 4px;
}
.pub-list > li b {
  font-size: 15px; font-weight: 600; color: var(--text); line-height: 1.5;
}
.pub-list > li > a {
  margin-left: 8px; font-size: 12.5px; font-weight: 600; color: var(--gold-strong);
  border-bottom: 1px solid color-mix(in srgb, var(--gold-strong) 40%, transparent);
  white-space: nowrap;
}
.pub-list > li > a:hover { color: var(--navy); border-color: var(--navy); }
.pub-list > li .float-right {
  float: right;
  font-size: 11.5px; font-weight: 700;
  background: var(--badge-c-bg); color: var(--badge-c-fg);
  padding: 3px 10px; border-radius: 999px;
}
.pub-list > li[data-rank="A"] .float-right { background: var(--badge-a-bg); color: var(--badge-a-fg); }
.pub-list > li[data-rank="B"] .float-right { background: var(--badge-b-bg); color: var(--badge-b-fg); }
.pub-list > li[data-rank="T1"] .float-right { background: var(--badge-t1-bg); color: var(--badge-t1-fg); }
.pub-list > li p {
  margin-top: 6px; font-size: 13.5px; color: var(--text-muted); line-height: 1.55; clear: both;
}
.pub-list > li p.comment { margin-top: 4px; font-size: 12.5px; color: var(--text-faint); font-style: italic; }
.pub-list > li p b { color: var(--navy); font-weight: 700; font-size: inherit; }

.pub-empty {
  display: none;
  text-align: center;
  padding: 40px 20px;
  color: var(--text-faint);
  font-size: 14px;
}
.pub-empty.is-visible { display: block; }

/* ---- footer --------------------------------------------------------------- */
.site-footer {
  border-top: 1px solid var(--border);
  padding: 34px 0 46px;
  background: var(--bg-soft);
}
.site-footer .container {
  display: flex; flex-wrap: wrap; justify-content: space-between; align-items: center; gap: 14px;
}
.footer-text { font-size: 13px; color: var(--text-faint); }
.footer-links { display: flex; gap: 14px; }
.footer-links a { font-size: 13px; color: var(--text-muted); }
.footer-links a:hover { color: var(--navy); }

/* ---- back to top ------------------------------------------------------------ */
.to-top {
  position: fixed; right: 22px; bottom: 22px; z-index: 90;
  width: 42px; height: 42px; border-radius: 50%;
  background: var(--navy); color: #fff;
  border: 0; cursor: pointer;
  display: flex; align-items: center; justify-content: center;
  box-shadow: var(--shadow-md);
  opacity: 0; transform: translateY(10px); pointer-events: none;
  transition: opacity .2s ease, transform .2s ease;
}
.to-top.is-visible { opacity: 1; transform: translateY(0); pointer-events: auto; }
.to-top svg { width: 17px; height: 17px; }

@media (prefers-reduced-motion: reduce) {
  * { scroll-behavior: auto !important; }
}

html { scroll-behavior: smooth; }
section, .section { scroll-margin-top: calc(var(--header-h) + 14px); }

@media (max-width: 640px) {
  .container { padding: 0 18px; }
  .section { padding: 56px 0; }
  .card-grid { gap: 12px; }
  .pub-search { margin-left: 0; width: 100%; }
  .pub-search input { width: 100%; }
}

@media (max-width: 520px) {
  .site-header .container { gap: 8px; padding: 0 14px; }
  .brand-name small { display: none; }
  .lang-switch { padding: 2px; }
  .lang-switch button { padding: 5px 8px; font-size: 12px; }
  .header-tools { gap: 4px; }
}