:root {
  --bg: #fbfaf7;
  --fg: #1d1d1f;
  --muted: #5b5b61;
  --rule: #e2dfd8;
  --accent: #1f4e79;
  --accent-fg: #ffffff;
  --card: #ffffff;
  --code-bg: #f1efe9;
  --measure: 44rem;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #141416;
    --fg: #ececee;
    --muted: #a3a3ab;
    --rule: #2c2c31;
    --accent: #8cb8e6;
    --accent-fg: #0d1a26;
    --card: #1b1b1f;
    --code-bg: #1f1f24;
  }
}
:root[data-theme="dark"] {
  --bg: #141416; --fg: #ececee; --muted: #a3a3ab; --rule: #2c2c31;
  --accent: #8cb8e6; --accent-fg: #0d1a26; --card: #1b1b1f; --code-bg: #1f1f24;
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font: 17px/1.6 Charter, "Bitstream Charter", "Iowan Old Style", Georgia, serif;
}
a { color: var(--accent); }
header.site, footer.site, main {
  max-width: var(--measure);
  margin: 0 auto;
  padding: 0 16px;
}
header.site { padding-top: 1.25rem; font: 600 0.9rem/1.4 system-ui, -apple-system, sans-serif; }
header.site a { text-decoration: none; color: var(--muted); }
footer.site {
  margin-top: 3rem; padding-bottom: 2rem; border-top: 1px solid var(--rule); padding-top: 1rem;
  color: var(--muted); font: 0.85rem/1.5 system-ui, -apple-system, sans-serif;
}
h1 { font-size: 1.85rem; line-height: 1.25; margin: 0.3rem 0 0.6rem; letter-spacing: -0.01em; }
h2 {
  font: 600 0.8rem/1.4 system-ui, -apple-system, sans-serif;
  text-transform: uppercase; letter-spacing: 0.08em; color: var(--muted);
  margin: 2.25rem 0 0.75rem;
}
.kicker, .author { font-family: system-ui, -apple-system, sans-serif; color: var(--muted); margin: 0; }
.kicker { font-size: 0.85rem; margin-top: 2rem; }
.author { font-size: 1rem; }
.links { display: flex; flex-wrap: wrap; gap: 0.5rem; margin: 1.25rem 0 0; }
.btn {
  display: inline-block; padding: 0.45rem 0.9rem; border: 1px solid var(--rule); border-radius: 6px;
  font: 600 0.9rem/1.2 system-ui, -apple-system, sans-serif; text-decoration: none; color: var(--fg);
  background: var(--card);
}
.btn.primary { background: var(--accent); color: var(--accent-fg); border-color: var(--accent); }
.btn:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
.tldr ul { padding-left: 1.2rem; margin: 0; }
.tldr li { margin: 0 0 0.6rem; }
.abstract p { margin: 0 0 1rem; }
figure { margin: 0; }
figure img { width: 100%; height: auto; border: 1px solid var(--rule); border-radius: 6px; background: #fff; }
figcaption { color: var(--muted); font-size: 0.92rem; margin-top: 0.5rem; }
pre.bib {
  background: var(--code-bg); border-radius: 6px; padding: 0.9rem 1rem; overflow-x: auto;
  font: 0.82rem/1.5 ui-monospace, SFMono-Regular, Menlo, monospace; margin: 0;
}
math { font-size: 1.05em; }

/* landing page */
.intro { color: var(--muted); margin: 0.5rem 0 1.5rem; }
.cards { display: grid; gap: 1rem; margin-bottom: 1rem; }
.card {
  background: var(--card); border: 1px solid var(--rule); border-radius: 8px; padding: 1.1rem 1.2rem;
}
.card h2 { all: unset; display: block; font-size: 1.2rem; line-height: 1.35; font-weight: 700; }
.card h2 a { color: var(--fg); text-decoration: none; }
.card h2 a:hover { text-decoration: underline; }
.card p { margin: 0.5rem 0 0.8rem; color: var(--muted); }
.card .links { margin-top: 0.4rem; }

@media print {
  header.site, .links, footer.site { display: none; }
  body { background: #fff; color: #000; }
}

/* the papers' abstracts use heavy bold for print; on screen it is set at normal weight */
.abstract strong { font-weight: inherit; }
.abstract, .tldr, h1, figcaption { overflow-wrap: break-word; }