/* CyberEvolver project page — academic single-column layout */

:root {
  --fg: #1f2328;
  --fg-muted: #57606a;
  --bg: #ffffff;
  --bg-soft: #f6f8fa;
  --accent: #2f4f8f;      /* deep blue */
  --accent-soft: #eaf0fb;
  --rule: #d0d7de;
  --code-bg: #f6f8fa;
  --pos: #1a7f37;
  --neg: #cf222e;
  --max-w: 860px;
}

html { scroll-behavior: smooth; }
* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: "Charter", "Source Serif Pro", "Georgia", "Times New Roman", serif;
  font-size: 17px;
  line-height: 1.65;
  color: var(--fg);
  background: var(--bg);
}

main {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 24px 22px 80px;
}

/* === Top navigation (anchor pills) === */
nav.top {
  position: sticky;
  top: 0;
  background: rgba(255,255,255,0.96);
  backdrop-filter: blur(6px);
  border-bottom: 1px solid var(--rule);
  z-index: 50;
  font-family: "Aptos", "IBM Plex Sans", "Helvetica Neue", Arial, sans-serif;
  font-size: 13px;
}
nav.top .inner {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 10px 22px;
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  align-items: center;
}
nav.top .brand { font-weight: 600; color: var(--accent); margin-right: auto; letter-spacing: 0.02em; }
nav.top a { color: var(--fg-muted); text-decoration: none; }
nav.top a:hover { color: var(--accent); }

/* === Hero === */
.hero { text-align: center; padding: 28px 0 8px; }
.hero h1 {
  font-family: "Charter", "Source Serif Pro", "Georgia", serif;
  font-size: 30px;
  line-height: 1.25;
  margin: 0 0 10px;
  letter-spacing: -0.005em;
}
.hero h1 .name {
  font-variant: small-caps;
  letter-spacing: 0.03em;
  color: var(--accent);
}
.hero .subtitle {
  font-size: 17px;
  color: var(--fg-muted);
  margin: 6px auto 16px;
  max-width: 720px;
}
.hero .authors {
  font-family: "Aptos", "IBM Plex Sans", "Helvetica Neue", Arial, sans-serif;
  font-size: 15px;
  margin: 12px 0 6px;
}
.hero .authors a { color: var(--fg); text-decoration: none; border-bottom: 1px dotted var(--fg-muted); }
.hero .authors a:hover { color: var(--accent); border-bottom-color: var(--accent); }
.hero sup { font-size: 0.7em; color: var(--accent); }
.hero .affil {
  font-family: "Aptos", "IBM Plex Sans", "Helvetica Neue", Arial, sans-serif;
  font-size: 13px;
  color: var(--fg-muted);
  margin: 2px 0 18px;
}
.hero .affil sup { color: var(--accent); }
.hero .badges { margin: 14px 0 6px; }
.hero .badges a {
  display: inline-block;
  margin: 4px 4px;
  padding: 7px 14px;
  font-family: "Aptos", "IBM Plex Sans", "Helvetica Neue", Arial, sans-serif;
  font-size: 13px;
  font-weight: 500;
  background: var(--fg);
  color: #ffffff;
  text-decoration: none;
  border-radius: 6px;
  transition: opacity 0.15s ease;
}
.hero .badges a:hover { opacity: 0.85; }
.hero .badges a.arxiv { background: #b91c1c; }
.hero .badges a.pdf   { background: #b91c1c; }
.hero .badges a.code  { background: #1f2328; }
.hero .badges a.docs  { background: #0f766e; }
.hero .badges a.bib   { background: #7c3aed; }
.hero .badges a svg { vertical-align: -2px; margin-right: 5px; }

/* === Section headings === */
h2 {
  font-family: "Charter", "Source Serif Pro", "Georgia", serif;
  font-size: 22px;
  margin: 44px 0 10px;
  padding-bottom: 6px;
  border-bottom: 1px solid var(--rule);
  color: var(--accent);
  letter-spacing: -0.005em;
}
h3 {
  font-family: "Aptos", "IBM Plex Sans", "Helvetica Neue", Arial, sans-serif;
  font-size: 16px;
  margin: 24px 0 8px;
  color: var(--fg);
}

p { margin: 0 0 14px; text-align: justify; hyphens: auto; }

a { color: var(--accent); text-decoration: underline; text-underline-offset: 2px; }
a:hover { color: #1a3261; }

/* === Figures === */
figure { margin: 18px 0 22px; text-align: center; }
figure img {
  max-width: 100%;
  height: auto;
  border-radius: 4px;
  background: var(--bg);
}
figure.bordered img { border: 1px solid var(--rule); }
figcaption {
  font-family: "Aptos", "IBM Plex Sans", "Helvetica Neue", Arial, sans-serif;
  font-size: 13.5px;
  line-height: 1.55;
  color: var(--fg-muted);
  margin-top: 8px;
  text-align: left;
  padding: 0 6px;
}
figcaption b, figcaption strong { color: var(--fg); }

/* === Cards: numbered challenge boxes === */
.challenge-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
  margin: 16px 0 24px;
}
@media (min-width: 720px) {
  .challenge-grid { grid-template-columns: 1fr 1fr 1fr; }
}
.challenge {
  border: 1px solid var(--rule);
  border-radius: 8px;
  padding: 14px 16px;
  background: var(--bg-soft);
}
.challenge .num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 22px; height: 22px;
  border-radius: 50%;
  background: var(--accent);
  color: white;
  font-family: "Aptos", "IBM Plex Sans", sans-serif;
  font-size: 12px;
  font-weight: 700;
  margin-right: 6px;
  vertical-align: 1px;
}
.challenge .label {
  font-family: "Aptos", "IBM Plex Sans", "Helvetica Neue", Arial, sans-serif;
  font-weight: 600;
  font-size: 14.5px;
  color: var(--accent);
}
.challenge p {
  margin: 8px 0 0;
  font-size: 14.5px;
  line-height: 1.55;
  text-align: left;
}

/* === Layer table === */
.layers {
  margin: 12px 0 18px;
  border: 1px solid var(--rule);
  border-radius: 6px;
  overflow: hidden;
}
.layers .row {
  display: grid;
  grid-template-columns: 160px 1fr;
  border-top: 1px solid var(--rule);
  font-size: 14.5px;
}
.layers .row:first-child { border-top: none; }
.layers .row .k {
  padding: 10px 12px;
  background: var(--bg-soft);
  font-family: "Aptos", "IBM Plex Sans", "Helvetica Neue", Arial, sans-serif;
  font-weight: 600;
  color: var(--accent);
}
.layers .row .k .sym {
  font-family: "Charter", "Source Serif Pro", serif;
  font-style: italic;
  color: var(--fg-muted);
  margin-left: 4px;
  font-weight: 400;
}
.layers .row .v {
  padding: 10px 14px;
  line-height: 1.55;
  text-align: left;
}

/* === Highlights row === */
.kpis {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
  margin: 16px 0 10px;
}
@media (min-width: 720px) {
  .kpis { grid-template-columns: repeat(4, 1fr); }
}
.kpi {
  border: 1px solid var(--rule);
  border-radius: 8px;
  padding: 14px 12px;
  background: var(--bg);
  text-align: center;
}
.kpi .v {
  font-family: "Charter", "Source Serif Pro", serif;
  font-size: 28px;
  font-weight: 600;
  color: var(--accent);
  letter-spacing: -0.01em;
}
.kpi .l {
  font-family: "Aptos", "IBM Plex Sans", sans-serif;
  font-size: 12.5px;
  color: var(--fg-muted);
  margin-top: 4px;
  line-height: 1.4;
}
.kpi.pos .v { color: var(--pos); }
.kpi.neg .v { color: var(--neg); }

/* === Results table (simplified) === */
.tablewrap { overflow-x: auto; margin: 14px 0 22px; }
table.results {
  width: 100%;
  border-collapse: collapse;
  font-family: "Aptos", "IBM Plex Sans", "Helvetica Neue", Arial, sans-serif;
  font-size: 13.5px;
}
table.results th, table.results td {
  padding: 7px 9px;
  border-bottom: 1px solid var(--rule);
  text-align: right;
  white-space: nowrap;
}
table.results th { font-weight: 600; color: var(--fg); background: var(--bg-soft); }
table.results td:first-child, table.results th:first-child {
  text-align: left;
  font-variant: tabular-nums;
}
table.results tbody tr:first-child td { border-top: 2px solid var(--fg); }
table.results tr.bench-head td {
  background: var(--bg-soft);
  font-weight: 600;
  text-align: left;
  color: var(--accent);
  border-top: 1px solid var(--rule);
}
table.results td.best { color: var(--accent); font-weight: 700; }
table.results .gain { color: var(--pos); font-weight: 500; font-size: 12px; }
table.results .loss { color: var(--neg); font-weight: 500; font-size: 12px; }
table.results td.cyev { background: var(--accent-soft); }

/* disabled badge (e.g. "arXiv coming soon") */
.hero .badges .badge-disabled {
  display: inline-block;
  margin: 4px 4px;
  padding: 7px 14px;
  font-family: "Aptos", "IBM Plex Sans", "Helvetica Neue", Arial, sans-serif;
  font-size: 13px;
  font-weight: 500;
  background: var(--fg);
  color: #ffffff;
  border-radius: 6px;
  opacity: 0.55;
  cursor: not-allowed;
}
.hero .badges .badge-disabled.arxiv { background: #b91c1c; }
.hero .badges .badge-disabled svg { vertical-align: -2px; margin-right: 5px; }

@media (max-width: 700px) {
  table.results { font-size: 12px; }
  table.results th, table.results td { padding: 5px 6px; }
  .hero h1 { font-size: 24px; }
  .hero .badges a { padding: 6px 10px; font-size: 12px; }
  .kpi .v { font-size: 24px; }
}

/* === Citation block === */
pre.bibtex {
  font-family: "JetBrains Mono", "Menlo", "Consolas", monospace;
  font-size: 12.5px;
  line-height: 1.55;
  background: var(--code-bg);
  border: 1px solid var(--rule);
  border-radius: 6px;
  padding: 14px 16px;
  overflow-x: auto;
  white-space: pre;
}

/* === Footer === */
footer {
  margin-top: 60px;
  padding-top: 20px;
  border-top: 1px solid var(--rule);
  font-family: "Aptos", "IBM Plex Sans", "Helvetica Neue", Arial, sans-serif;
  font-size: 13px;
  color: var(--fg-muted);
  text-align: center;
}
footer a { color: var(--fg-muted); }

/* small helpers */
.muted { color: var(--fg-muted); }
.tight { margin-bottom: 6px; }