/* ==========================================================================
   WebCoder project page
   Palette, surfaces and ink roles follow the validated reference instance.
   Light surface #fcfcfb / dark surface #1a1a19.
   ========================================================================== */

:root {
  color-scheme: light;
  --surface-1: #fcfcfb;
  --plane: #f9f9f7;
  --text-primary: #0b0b0b;
  --text-secondary: #52514e;
  --text-muted: #898781;
  --rule: #e1e0d9;
  --border: rgba(11, 11, 11, 0.10);
  --accent: #2a78d6;
  --accent-soft: #cde2fb;
  --accent-wash: #f1f6fd;
  --good: #006300;
  --code-bg: #f2f1ed;
  --radius: 10px;
  --maxw: 1080px;
  --font-sans: system-ui, -apple-system, "Segoe UI", sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, monospace;
}

@media (prefers-color-scheme: dark) {
  :root:where(:not([data-theme="light"])) {
    color-scheme: dark;
    --surface-1: #1a1a19;
    --plane: #0d0d0d;
    --text-primary: #ffffff;
    --text-secondary: #c3c2b7;
    --text-muted: #898781;
    --rule: #2c2c2a;
    --border: rgba(255, 255, 255, 0.10);
    --accent: #3987e5;
    --accent-soft: #184f95;
    --accent-wash: #1e2430;
    --good: #0ca30c;
    --code-bg: #212120;
  }
}

:root[data-theme="dark"] {
  color-scheme: dark;
  --surface-1: #1a1a19;
  --plane: #0d0d0d;
  --text-primary: #ffffff;
  --text-secondary: #c3c2b7;
  --text-muted: #898781;
  --rule: #2c2c2a;
  --border: rgba(255, 255, 255, 0.10);
  --accent: #3987e5;
  --accent-soft: #184f95;
  --accent-wash: #1e2430;
  --good: #0ca30c;
  --code-bg: #212120;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; scroll-padding-top: 72px; }

body {
  margin: 0;
  background: var(--plane);
  color: var(--text-primary);
  font-family: var(--font-sans);
  font-size: 17px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

.wrap { max-width: var(--maxw); margin: 0 auto; padding: 0 24px; }

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

/* ---------- top nav ---------- */

.nav {
  position: sticky;
  top: 0;
  z-index: 40;
  background: color-mix(in srgb, var(--plane) 88%, transparent);
  backdrop-filter: saturate(1.4) blur(10px);
  border-bottom: 1px solid var(--rule);
}
.nav-inner {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 10px 24px;
  display: flex;
  align-items: center;
  gap: 20px;
}
.nav-brand {
  display: flex;
  align-items: center;
  gap: 8px;
  font-weight: 650;
  letter-spacing: -0.01em;
  color: var(--text-primary);
}
.nav-brand img { width: 24px; height: 24px; }
.nav-links { display: flex; gap: 18px; margin-left: auto; align-items: center; }
.nav-links a {
  color: var(--text-secondary);
  font-size: 15px;
  font-weight: 500;
}
.nav-links a:hover { color: var(--text-primary); text-decoration: none; }

.theme-toggle {
  border: 1px solid var(--border);
  background: var(--surface-1);
  color: var(--text-secondary);
  border-radius: 8px;
  width: 34px;
  height: 30px;
  cursor: pointer;
  font-size: 15px;
  line-height: 1;
  display: grid;
  place-items: center;
}
.theme-toggle:hover { color: var(--text-primary); }

@media (max-width: 760px) {
  .hero h1 .nb { display: none; }
  .nav-links a { display: none; }
  .nav-links .theme-toggle { display: grid; }
}

/* ---------- hero ---------- */

.hero { padding: 56px 0 8px; text-align: center; }
.hero-logo { width: 84px; height: 84px; margin-bottom: 18px; }
.hero h1 {
  font-size: clamp(28px, 4.2vw, 44px);
  line-height: 1.18;
  letter-spacing: -0.02em;
  font-weight: 700;
  margin: 0 0 6px;
}
.hero .venue {
  color: var(--text-muted);
  font-size: 15px;
  margin: 0 0 24px;
}

.authors {
  font-size: 17px;
  line-height: 1.9;
  margin: 0 auto 10px;
  max-width: 760px;
  color: var(--text-primary);
}
.authors a { color: var(--text-primary); border-bottom: 1px solid var(--border); }
.authors a:hover { color: var(--accent); border-color: var(--accent); text-decoration: none; }
.authors sup { color: var(--accent); font-size: 12px; font-weight: 600; }

.affils {
  font-size: 15.5px;
  color: var(--text-secondary);
  margin: 0 auto 4px;
  max-width: 760px;
}
.affils sup { color: var(--accent); font-weight: 600; }
.notes {
  font-size: 14px;
  color: var(--text-muted);
  margin: 10px auto 0;
  max-width: 700px;
}

/* ---------- link buttons ---------- */

.links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  justify-content: center;
  margin: 28px 0 8px;
}
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 9px 18px;
  border-radius: 999px;
  background: var(--text-primary);
  color: var(--plane);
  font-size: 15px;
  font-weight: 550;
  border: 1px solid transparent;
}
.btn:hover { text-decoration: none; opacity: 0.88; }
.btn svg { width: 16px; height: 16px; fill: currentColor; }
.btn.ghost {
  background: var(--surface-1);
  color: var(--text-primary);
  border-color: var(--border);
}
.btn.pending {
  background: var(--surface-1);
  color: var(--text-muted);
  border-color: var(--border);
  border-style: dashed;
  cursor: not-allowed;
}
.btn.pending:hover { opacity: 1; text-decoration: none; }

/* ---------- KPI row (stat tiles) ---------- */

.kpis {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
  margin: 40px 0 8px;
}
@media (max-width: 760px) { .kpis { grid-template-columns: 1fr; } }

.kpi {
  background: var(--surface-1);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 18px 20px;
  text-align: left;
}
.kpi .label {
  font-size: 14px;
  color: var(--text-secondary);
  margin-bottom: 6px;
}
.kpi .value {
  font-size: 40px;
  font-weight: 650;
  letter-spacing: -0.02em;
  line-height: 1.05;
}
.kpi .delta {
  font-size: 14px;
  color: var(--good);
  font-weight: 550;
  margin-top: 6px;
}
.kpi .delta .from { color: var(--text-muted); font-weight: 400; }

/* ---------- sections ---------- */

section { padding: 46px 0; }
section + section { border-top: 1px solid var(--rule); }

h2 {
  font-size: 15px;
  font-weight: 650;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent);
  margin: 0 0 18px;
}
h3 {
  font-size: 20px;
  font-weight: 620;
  letter-spacing: -0.01em;
  margin: 28px 0 10px;
}
p { color: var(--text-secondary); margin: 0 0 16px; }
.lead { font-size: 18px; color: var(--text-primary); }
.abstract p { text-align: justify; hyphens: auto; }

/* ---------- figures ---------- */

figure {
  margin: 0 0 26px;
  background: var(--surface-1);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 14px;
}
figure img {
  width: 100%;
  height: auto;
  display: block;
  border-radius: 6px;
  cursor: zoom-in;
}
figcaption {
  font-size: 14.5px;
  color: var(--text-secondary);
  line-height: 1.55;
  margin-top: 12px;
  padding: 0 4px;
}
figcaption b { color: var(--text-primary); font-weight: 600; }

figure.video { padding: 10px; }
figure.video video {
  width: 100%;
  height: auto;
  display: block;
  border-radius: 6px;
  background: #000;
}

.two-col { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
@media (max-width: 860px) { .two-col { grid-template-columns: 1fr; } }

/* ---------- results table ---------- */

.table-scroll {
  overflow-x: auto;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface-1);
}
table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14.5px;
  font-variant-numeric: tabular-nums;
}
caption {
  caption-side: bottom;
  text-align: left;
  font-size: 14px;
  color: var(--text-secondary);
  padding: 14px 16px 2px;
  line-height: 1.55;
}
thead th {
  background: var(--surface-1);
  font-weight: 620;
  color: var(--text-primary);
  text-align: right;
  padding: 10px 12px;
  border-bottom: 1px solid var(--rule);
  white-space: nowrap;
}
thead tr:first-child th { border-bottom: none; }
thead th.group {
  text-align: center;
  color: var(--text-secondary);
  font-size: 13px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  border-bottom: 1px solid var(--rule);
}
thead th:first-child { text-align: left; }
th.sep, td.sep { border-left: 1px solid var(--rule); }

tbody td {
  padding: 8px 12px;
  text-align: right;
  border-bottom: 1px solid var(--rule);
  color: var(--text-secondary);
  white-space: nowrap;
}
tbody td:first-child {
  text-align: left;
  color: var(--text-primary);
  font-weight: 500;
}
tbody td .aside { color: var(--text-muted); font-weight: 400; }
tbody tr:last-child td { border-bottom: none; }
tbody tr.group-row td {
  background: var(--plane);
  text-align: center;
  font-size: 13px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--text-muted);
  font-weight: 600;
  padding: 7px 12px;
}
tbody tr.ours td {
  background: var(--accent-wash);
  background: color-mix(in srgb, var(--accent) 7%, var(--surface-1));
  color: var(--text-primary);
}
tbody tr.ours td:first-child { font-weight: 680; }
tbody tr:hover:not(.group-row) td {
  background: color-mix(in srgb, var(--accent) 4%, var(--surface-1));
}
tbody tr.ours:hover td {
  background: color-mix(in srgb, var(--accent) 11%, var(--surface-1));
}

/* best / second: never colour alone — weight and underline carry it too.
   Selectors must out-specify `tbody tr.ours td`, which also sets a colour. */
tbody tr td.best { font-weight: 700; color: var(--accent); }
tbody tr td.second { text-decoration: underline; text-underline-offset: 3px; }
.table-note .best { font-weight: 700; color: var(--accent); }
.table-note .second { text-decoration: underline; text-underline-offset: 3px; }

.table-note {
  font-size: 13.5px;
  color: var(--text-muted);
  margin-top: 12px;
}
.table-note .best, .table-note .second { font-size: 13.5px; }

/* ---------- bibtex ---------- */

.code-card {
  position: relative;
  background: var(--code-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}
.code-card pre {
  margin: 0;
  padding: 18px 20px;
  overflow-x: auto;
  font-family: var(--font-mono);
  font-size: 13.5px;
  line-height: 1.6;
  color: var(--text-primary);
}
.copy-btn {
  position: absolute;
  top: 10px;
  right: 10px;
  border: 1px solid var(--border);
  background: var(--surface-1);
  color: var(--text-secondary);
  border-radius: 7px;
  padding: 5px 11px;
  font-size: 13px;
  font-family: var(--font-sans);
  cursor: pointer;
}
.copy-btn:hover { color: var(--text-primary); }

/* ---------- lightbox ---------- */

.lightbox {
  position: fixed;
  inset: 0;
  z-index: 90;
  background: rgba(0, 0, 0, 0.88);
  display: none;
  place-items: center;
  padding: 28px;
  overflow: auto;
}
.lightbox[open] { display: grid; }
.lightbox img {
  max-width: 100%;
  max-height: none;
  width: auto;
  border-radius: 6px;
  background: #fff;
}
.lightbox-close {
  position: fixed;
  top: 16px;
  right: 20px;
  background: none;
  border: none;
  color: #fff;
  font-size: 30px;
  line-height: 1;
  cursor: pointer;
}

/* ---------- footer ---------- */

footer {
  border-top: 1px solid var(--rule);
  padding: 30px 0 48px;
  color: var(--text-muted);
  font-size: 14px;
}
footer p { color: var(--text-muted); margin: 0 0 8px; }

@media print {
  .nav, .theme-toggle, .lightbox, .copy-btn { display: none !important; }
}