:root {
  --bg: #fbfbfc;
  --fg: #121417;
  --muted: #57606a;
  --link: #0b5cad;
  --surface: #ffffff;
  --surface-soft: #f2f5f8;
  --border: #d7dde5;
  --accent: #9b3a38;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #101214;
    --fg: #e9edf1;
    --muted: #a5adb7;
    --link: #7db8ff;
    --surface: #171b20;
    --surface-soft: #20262d;
    --border: #313943;
    --accent: #ef9b79;
  }
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
}

body {
  background: var(--bg);
  color: var(--fg);
  font: 16px/1.65 system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

a {
  color: var(--link);
  text-decoration: none;
}

a:hover,
a:focus {
  text-decoration: underline;
}

.wrap {
  max-width: 980px;
  margin: 0 auto;
  padding: 44px 18px 28px;
}

.site-header {
  margin-bottom: 34px;
}

.paper-header {
  margin-bottom: 28px;
}

.eyebrow {
  color: var(--accent);
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0;
  margin: 0 0 8px;
  text-transform: uppercase;
}

h1 {
  font-size: clamp(2rem, 4vw, 3rem);
  line-height: 1.1;
  margin: 0 0 12px;
}

.paper-page h1 {
  max-width: 880px;
}

h2 {
  border-top: 1px solid var(--border);
  font-size: 1.35rem;
  line-height: 1.25;
  margin: 34px 0 14px;
  padding-top: 24px;
}

h3 {
  font-size: 1.02rem;
  line-height: 1.35;
  margin: 0 0 4px;
}

.sub,
.authors,
.venue,
footer {
  color: var(--muted);
}

.sub {
  max-width: 760px;
  margin: 0 0 20px;
}

.nav-links,
.links,
.paper-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.nav-links a,
.links a,
.button {
  border: 1px solid var(--border);
  border-radius: 8px;
  display: inline-flex;
  align-items: center;
  min-height: 34px;
  padding: 6px 10px;
}

.button {
  background: var(--fg);
  border-color: var(--fg);
  color: var(--bg);
  font-weight: 650;
}

.button.secondary {
  background: transparent;
  border-color: var(--border);
  color: var(--link);
}

.paper-list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.paper-item {
  align-items: flex-start;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 8px;
  display: grid;
  gap: 16px;
  grid-template-columns: 4rem 1fr;
  margin: 10px 0;
  padding: 15px 16px;
}

.paper-item.compact {
  grid-template-columns: 4rem 1fr;
}

.year {
  color: var(--muted);
  font-weight: 700;
}

.authors,
.venue,
.links {
  margin: 0;
}

.links {
  margin-top: 10px;
}

.links a {
  background: var(--surface-soft);
  font-size: 0.9rem;
}

.back-link {
  display: inline-block;
  margin-bottom: 18px;
}

.metadata {
  display: grid;
  gap: 10px;
  margin: 0;
}

.metadata div {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 8px;
  display: grid;
  gap: 8px;
  grid-template-columns: 8rem 1fr;
  padding: 12px 14px;
}

.metadata dt {
  color: var(--muted);
  font-weight: 700;
}

.metadata dd {
  margin: 0;
}

footer {
  margin-top: 32px;
  font-size: 0.95rem;
}

@media (max-width: 640px) {
  .wrap {
    padding-top: 28px;
  }

  .paper-item,
  .metadata div {
    grid-template-columns: 1fr;
  }

  .year {
    margin-bottom: -8px;
  }
}