@font-face { font-family: 'Marcellus SC'; src: url('marcellus-sc.woff2') format('woff2'); font-weight: 400; font-style: normal; font-display: block; }
:root {
  --bg: #fbfaf7;
  --ink: #1d1d1f;
  --muted: #62626a;
  --rule: #dcdad3;
  --accent: #1f4e79;
  --chip-bg: #efede6;
  --measure: 46rem;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #16171a;
    --ink: #ecebe6;
    --muted: #a3a3ab;
    --rule: #33353a;
    --accent: #8db6e0;
    --chip-bg: #24262b;
  }
}
* { box-sizing: border-box; }
html { font-size: 18px; scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: Georgia, "Iowan Old Style", "Palatino Linotype", serif;
  line-height: 1.6;
}
a { color: var(--accent); text-underline-offset: 3px; }
a:hover { text-decoration-thickness: 2px; }
.wrap { max-width: var(--measure); margin: 0 auto; padding: 0 1.25rem; }

header.site { border-bottom: 1px solid var(--rule); }
header.site .wrap {
  display: flex; flex-wrap: wrap; align-items: baseline;
  justify-content: space-between; gap: .5rem 2rem; padding-top: 1.1rem; padding-bottom: 1.1rem;
}
.brand { font-size: 1.15rem; font-weight: 700; color: var(--ink); text-decoration: none; letter-spacing: .01em; }
nav.main { font-family: system-ui, -apple-system, "Segoe UI", sans-serif; font-size: .85rem; }
nav.main a { color: var(--muted); text-decoration: none; margin-right: 1.2rem; padding: .2rem 0; }
nav.main a:last-child { margin-right: 0; }
nav.main a:hover, nav.main a[aria-current="page"] { color: var(--ink); border-bottom: 2px solid var(--accent); }

main { padding: 2.5rem 0 4rem; }
h1, h2, h3 { line-height: 1.25; }
h1 { font-size: 2.1rem; margin: 0 0 .4rem; letter-spacing: -.01em; }
h2 { font-size: 1.35rem; margin: 3rem 0 .6rem; padding-top: 1.4rem; border-top: 1px solid var(--rule); }
h3 { font-size: 1.05rem; margin: 1.6rem 0 .3rem; }
.sans { font-family: system-ui, -apple-system, "Segoe UI", sans-serif; }
.lede { font-size: 1.12rem; color: var(--ink); }
.affil { color: var(--muted); font-family: system-ui, sans-serif; font-size: .9rem; margin: 0 0 1.5rem; }

/* home */
.intro { display: grid; gap: 1.5rem; }
.sim { margin: 1.5rem 0 .5rem; }
.sim canvas {
  width: 100%; height: auto; aspect-ratio: 16 / 9; display: block;
  border: 1px solid var(--rule); background: var(--chip-bg); border-radius: 4px;
}
.sim-bar {
  display: flex; flex-wrap: wrap; gap: .5rem 1rem; align-items: center; justify-content: space-between;
  font-family: system-ui, sans-serif; font-size: .8rem; color: var(--muted); margin-top: .5rem;
}
.sim-bar button {
  font: inherit; color: var(--ink); background: transparent; border: 1px solid var(--rule);
  border-radius: 3px; padding: .25rem .7rem; cursor: pointer;
}
.sim-bar button:hover { border-color: var(--accent); }
.sim-bar button:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
.sim-cap { font-size: .88rem; color: var(--muted); margin: .4rem 0 0; }

/* research */
.summary { display: flex; flex-wrap: wrap; gap: .6rem; margin: 1.2rem 0 0; padding: 0; list-style: none; font-family: system-ui, sans-serif; font-size: .85rem; }
.summary li { background: var(--chip-bg); border-radius: 999px; padding: .3rem .85rem; }
.summary strong { color: var(--accent); margin-right: .25rem; }
.toc { font-family: system-ui, sans-serif; font-size: .9rem; margin: 1.5rem 0 0; padding-left: 1.2rem; }
.stream-intro { color: var(--muted); }
.paper { margin: 0 0 1.8rem; }
.paper .authors { margin: 0; color: var(--muted); font-size: .95rem; }
.paper .status { margin: .15rem 0 .4rem; font-family: system-ui, sans-serif; font-size: .8rem; letter-spacing: .02em; }
.paper .status .tag { font-weight: 600; color: var(--accent); }
.paper .venue { margin: .4rem 0 0; font-size: .92rem; color: var(--muted); }
.paper p { margin: .4rem 0; }
figure.video { margin: 1.5rem 0; }
figure.video figcaption { font-size: .88rem; color: var(--muted); }

/* blog */
.post-list { list-style: none; padding: 0; margin: 1.5rem 0; }
.post-list li { padding: .9rem 0; border-bottom: 1px solid var(--rule); }
.post-list time { display: block; font-family: system-ui, sans-serif; font-size: .8rem; color: var(--muted); }
.post-list a { font-size: 1.1rem; }
article time { font-family: system-ui, sans-serif; font-size: .85rem; color: var(--muted); }

footer.site { border-top: 1px solid var(--rule); font-family: system-ui, sans-serif; font-size: .8rem; color: var(--muted); }
footer.site .wrap { padding-top: 1.2rem; padding-bottom: 2rem; }

.skip { position: absolute; left: -999px; }
.skip:focus { left: 1rem; top: 1rem; background: var(--bg); padding: .4rem .8rem; z-index: 10; }
@media (max-width: 34rem) { html { font-size: 17px; } h1 { font-size: 1.7rem; } }