/* Geometry-Aware Mid-Training for World-Action Models — project page */

:root {
  --ink: #1f2328;
  --ink-soft: #4a5158;
  --ink-faint: #7d858c;
  --rule: #e3e6ea;
  --bg: #ffffff;
  --bg-soft: #f7f8fa;
  --accent: #1f6feb;
  --accent-soft: #e8f0fe;
  --wip: #b45309;
  --wip-bg: #fff7ed;
  --wip-rule: #fed7aa;
  --maxw: 900px;
}

* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: "Charter", "Bitstream Charter", "Source Serif Pro", Georgia, "Times New Roman", serif;
  font-size: 17px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

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

/* ---------- work-in-progress banner ---------- */

.wip-banner {
  background: var(--wip-bg);
  border-bottom: 1px solid var(--wip-rule);
  color: var(--wip);
  text-align: center;
  padding: 10px 24px;
  font-size: 0.86rem;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
  letter-spacing: 0.02em;
}

.wip-banner strong {
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.09em;
  margin-right: 0.5em;
}

/* ---------- title block ---------- */

header.hero {
  text-align: center;
  padding: 56px 0 28px;
  border-bottom: 1px solid var(--rule);
}

h1.title {
  font-size: 2.3rem;
  line-height: 1.25;
  font-weight: 700;
  margin: 0 0 22px;
  letter-spacing: -0.015em;
}

.venue {
  display: inline-block;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--wip);
  background: var(--wip-bg);
  border: 1px solid var(--wip-rule);
  border-radius: 999px;
  padding: 5px 14px;
  margin-bottom: 22px;
}

.authors {
  font-size: 1.06rem;
  margin: 0 0 6px;
  color: var(--ink);
}

.authors a { color: var(--ink); text-decoration: none; border-bottom: 1px solid var(--rule); }
.authors a:hover { border-bottom-color: var(--accent); color: var(--accent); }

.affil {
  font-size: 0.96rem;
  color: var(--ink-soft);
  margin: 0 0 4px;
}

.eq-note {
  font-size: 0.86rem;
  color: var(--ink-faint);
  margin: 0;
}

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

.links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  justify-content: center;
  margin-top: 26px;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
  font-size: 0.9rem;
  font-weight: 500;
  padding: 9px 20px;
  border-radius: 999px;
  text-decoration: none;
  background: var(--ink);
  color: #fff;
  border: 1px solid var(--ink);
  transition: opacity 0.15s ease;
}

.btn:hover { opacity: 0.82; }

.btn.disabled {
  background: var(--bg-soft);
  color: var(--ink-faint);
  border-color: var(--rule);
  cursor: not-allowed;
  pointer-events: none;
}

.btn .tag {
  font-size: 0.72rem;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  opacity: 0.85;
}

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

section { padding: 44px 0; border-bottom: 1px solid var(--rule); }
section:last-of-type { border-bottom: none; }

h2 {
  font-size: 1.5rem;
  font-weight: 700;
  margin: 0 0 18px;
  letter-spacing: -0.01em;
}

h3 {
  font-size: 1.12rem;
  font-weight: 700;
  margin: 30px 0 10px;
}

p { margin: 0 0 16px; }
p:last-child { margin-bottom: 0; }

.lead { font-size: 1.02rem; }

em.term { font-style: italic; }

code, .mono {
  font-family: "SF Mono", ui-monospace, Menlo, Consolas, monospace;
  font-size: 0.88em;
  background: var(--bg-soft);
  border: 1px solid var(--rule);
  border-radius: 4px;
  padding: 1px 5px;
}

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

figure { margin: 26px 0; }

figure img {
  display: block;
  width: 100%;
  height: auto;
  border: 1px solid var(--rule);
  border-radius: 6px;
  background: #fff;
}

figcaption {
  font-size: 0.9rem;
  color: var(--ink-soft);
  line-height: 1.55;
  margin-top: 12px;
}

figcaption b { color: var(--ink); }

/* teaser sits full-bleed-ish under the header */
.teaser { margin: 0; padding: 38px 0 0; }
.teaser figure { margin-top: 0; }

/* ---------- highlight numbers ---------- */

.highlights {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
  margin: 26px 0 8px;
}

.hl {
  background: var(--bg-soft);
  border: 1px solid var(--rule);
  border-radius: 8px;
  padding: 18px 16px;
  text-align: center;
}

.hl .num {
  display: block;
  font-size: 1.75rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.1;
}

.hl .delta {
  display: block;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
  font-size: 0.82rem;
  font-weight: 600;
  color: #15803d;
  margin-top: 3px;
}

.hl .lbl {
  display: block;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
  font-size: 0.78rem;
  color: var(--ink-faint);
  margin-top: 7px;
  line-height: 1.4;
}

/* ---------- tables ---------- */

.table-scroll {
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  margin: 20px 0 10px;
}

table {
  width: 100%;
  border-collapse: collapse;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
  font-size: 0.87rem;
  white-space: nowrap;
}

caption {
  caption-side: top;
  text-align: left;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
  font-size: 0.9rem;
  color: var(--ink-soft);
  padding-bottom: 12px;
  white-space: normal;
  line-height: 1.55;
}

caption b { color: var(--ink); }

th, td {
  padding: 8px 12px;
  text-align: right;
  border-bottom: 1px solid var(--rule);
}

th:first-child, td:first-child { text-align: left; }

thead th {
  border-top: 1.5px solid var(--ink);
  border-bottom: 1px solid var(--ink);
  font-weight: 600;
  color: var(--ink);
}

tbody tr:last-child td { border-bottom: 1.5px solid var(--ink); }

tr.best td { font-weight: 700; background: var(--accent-soft); }

td.gain { color: #15803d; font-weight: 600; }

.tbl-note {
  font-size: 0.84rem;
  color: var(--ink-faint);
  margin-top: 4px;
}

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

pre.bibtex {
  background: var(--bg-soft);
  border: 1px solid var(--rule);
  border-radius: 8px;
  padding: 18px 20px;
  overflow-x: auto;
  font-family: "SF Mono", ui-monospace, Menlo, Consolas, monospace;
  font-size: 0.84rem;
  line-height: 1.6;
  color: var(--ink-soft);
  margin: 0;
}

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

footer {
  padding: 34px 0 56px;
  text-align: center;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
  font-size: 0.84rem;
  color: var(--ink-faint);
  line-height: 1.7;
}

footer a { color: var(--ink-faint); }

/* ---------- responsive ---------- */

@media (max-width: 700px) {
  body { font-size: 16px; }
  h1.title { font-size: 1.65rem; }
  h2 { font-size: 1.3rem; }
  header.hero { padding-top: 36px; }
  .highlights { grid-template-columns: 1fr; }
}