:root {
  --bg: #fbf8f3;
  --fg: #1d1a16;
  --muted: #6b645a;
  --card: #ffffff;
  --line: #e6dfd2;
  --accent: #c8501e;
  --sky-a: #fdf0dc;
  --sky-b: #f6d9b3;
  --ground: #b58a52;
  --trail: rgba(200, 80, 30, 0.55);
  --star: rgba(60, 40, 20, 0.35);
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0d0f17;
    --fg: #ece8df;
    --muted: #9a958a;
    --card: #151926;
    --line: #262b3b;
    --accent: #ff8a4c;
    --sky-a: #0d0f17;
    --sky-b: #1b1f33;
    --ground: #2a2f45;
    --trail: rgba(255, 138, 76, 0.6);
    --star: rgba(255, 255, 255, 0.8);
  }
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font: 17px/1.6 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }
code { font: 0.85em ui-monospace, Menlo, monospace; background: var(--line); padding: 1px 5px; border-radius: 4px; }

.hero {
  position: relative;
  height: min(70vh, 560px);
  min-height: 380px;
  background: linear-gradient(var(--sky-a), var(--sky-b));
  overflow: hidden;
  border-bottom: 1px solid var(--line);
}
#sky { position: absolute; inset: 0; width: 100%; height: 100%; }

.controls {
  display: flex; flex-wrap: wrap; align-items: center; gap: 10px 22px;
  padding: 12px 24px;
  background: var(--card);
  border-bottom: 1px solid var(--line);
  font-size: 0.95rem;
}
.controls .ctl { display: flex; align-items: center; gap: 8px; }
.controls input[type=range] { width: 130px; accent-color: var(--accent); }
.controls output { min-width: 2.6em; font: 0.9rem ui-monospace, Menlo, monospace; }
.controls button.step {
  width: 30px; height: 30px; padding: 0; line-height: 1;
  background: var(--bg); color: var(--fg); border: 1px solid var(--line); font-size: 1.1rem;
  touch-action: manipulation; user-select: none;
}
.controls button.step:hover { border-color: var(--accent); }
.controls #fire {
  font: inherit; font-weight: 600;
  padding: 7px 20px; border: 0; border-radius: 999px;
  background: var(--accent); color: #fff; cursor: pointer;
}
.controls #fire:disabled { opacity: .5; cursor: default; }
.controls .stat { font: 0.9rem ui-monospace, Menlo, monospace; color: var(--muted); }
.controls .stat:first-of-type { margin-left: auto; }
.hero-text {
  position: absolute;
  top: 8%;
  left: 0; right: 0;
  padding: 0 24px;
  max-width: 860px;
  margin: 0 auto;
  pointer-events: none;
}
.hero-text a { pointer-events: auto; }
h1 { font-size: clamp(2.4rem, 8vw, 4.6rem); line-height: 1.05; margin: 0 0 12px; letter-spacing: -0.02em; }
.tagline { font-size: 1.15rem; max-width: 34em; margin: 0 0 18px; }
.links { display: flex; flex-wrap: wrap; gap: 8px; }
.links a {
  padding: 6px 14px;
  border: 1px solid var(--fg);
  border-radius: 999px;
  color: var(--fg);
  background: color-mix(in srgb, var(--bg) 60%, transparent);
  font-size: 0.95rem;
}
.links a:hover { background: var(--accent); border-color: var(--accent); color: #fff; text-decoration: none; }
.hint { color: var(--muted); font-size: 0.85rem; margin-top: 14px; transition: opacity .6s; }

main, footer { max-width: 860px; margin: 0 auto; padding: 0 24px; }
section { padding: 48px 0 8px; }
h2 { font-size: 1.5rem; margin: 0 0 16px; letter-spacing: -0.01em; }
h2::before { content: "// "; color: var(--accent); font-weight: 400; }
.sub, .more { color: var(--muted); }

.cards { display: grid; gap: 14px; grid-template-columns: repeat(auto-fill, minmax(240px, 1fr)); }
.cards.two { grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); }
.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 16px 18px;
  color: var(--fg);
  transition: transform .15s, border-color .15s;
}
.card h3 { margin: 0 0 6px; font-size: 1.05rem; display: flex; justify-content: space-between; gap: 8px; }
.card p { margin: 0; color: var(--muted); font-size: 0.93rem; }
a.card:hover { transform: translateY(-2px); border-color: var(--accent); text-decoration: none; }
.card.soon { border-style: dashed; }
.stars { color: var(--muted); font-weight: 400; font-size: 0.85rem; }
.stars:not(:empty)::before { content: "★ "; }

.papers { list-style: none; margin: 0; padding: 0; }
.papers li { padding: 14px 0; border-top: 1px solid var(--line); display: grid; gap: 2px; }
.papers li:first-child { border-top: 0; }
.venue { font: 0.78rem ui-monospace, Menlo, monospace; color: var(--accent); text-transform: uppercase; letter-spacing: .04em; }
.authors { color: var(--muted); font-size: 0.9rem; }

footer { padding-top: 48px; padding-bottom: 40px; color: var(--muted); font-size: 0.85rem; }

@media (max-width: 520px) {
  .hero { min-height: 440px; }
}

.about { display: flex; gap: 24px; align-items: flex-start; }
.about p:first-child { margin-top: 0; }
.portrait { width: 160px; height: 160px; border-radius: 50%; object-fit: cover; border: 3px solid var(--card); box-shadow: 0 0 0 1px var(--line); flex: none; }
@media (max-width: 600px) { .about { flex-direction: column; align-items: center; } .about p { text-align: left; } }