:root {
  --text: #1c1c1e;
  --muted: #5f6368;
  --accent: #1f4e79;
  --rule: #e6e6e6;
  --bg: #ffffff;
  --band: #f5f6f8;
}
@media (prefers-color-scheme: dark) {
  :root {
    --text: #e8e8ea;
    --muted: #a0a4aa;
    --accent: #8cb8e6;
    --rule: #2e3136;
    --bg: #141517;
    --band: #1c1e21;
  }
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: "Inter", system-ui, -apple-system, "Segoe UI", sans-serif;
  font-size: 17px;
  line-height: 1.65;
  border-top: 4px solid var(--accent);
}

.wrap {
  max-width: 900px;
  margin: 0 auto;
  padding: 0 24px;
}

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

/* Top bar */
header {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: 8px 24px;
  padding: 22px 0;
}
.name {
  font-weight: 600;
  font-size: 1rem;
  color: var(--text);
  letter-spacing: 0.01em;
}
.name:hover { text-decoration: none; }
nav a {
  margin-left: 26px;
  color: var(--muted);
  font-size: 0.92rem;
}
nav a:first-child { margin-left: 0; }
nav a:hover, nav a[aria-current="page"] { color: var(--accent); text-decoration: none; }

/* Home page hero */
.hero {
  background: var(--band);
  border-bottom: 1px solid var(--rule);
  padding: 0 0 44px;
}
.hero header { justify-content: flex-end; padding: 22px 0 30px; }
.hero h1 {
  font-size: 2.6rem;
  font-weight: 600;
  letter-spacing: -0.015em;
  line-height: 1.15;
  margin: 0 0 8px;
}
.hero .role { color: var(--muted); margin: 0; font-size: 1.05rem; }
.hero .links {
  margin-top: 14px;
  font-size: 0.95rem;
  display: flex;
  flex-wrap: wrap;
  gap: 6px 22px;
}

main { padding: 44px 0 64px; }

.intro {
  display: grid;
  grid-template-columns: 260px 1fr;
  gap: 48px;
  align-items: start;
}
.intro img {
  width: 100%;
  aspect-ratio: 1 / 1;
  object-fit: cover;
  border-radius: 10px;
  display: block;
}
.intro p:first-child { margin-top: 0; }
@media (max-width: 680px) {
  .hero { padding: 0 0 30px; }
  .hero header { justify-content: flex-start; padding-bottom: 22px; }
  .hero h1 { font-size: 2rem; }
  .intro { grid-template-columns: 1fr; gap: 28px; }
  .intro img { max-width: 220px; }
}

/* Research page */
h2 {
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--muted);
  font-weight: 600;
  margin: 44px 0 18px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--rule);
}
h2:first-child { margin-top: 0; }
.paper { margin-bottom: 26px; }
.paper .title { font-weight: 600; font-size: 1.02rem; line-height: 1.45; }
.paper .meta { color: var(--muted); font-size: 0.93rem; margin-top: 2px; }
.paper details { margin-top: 6px; font-size: 0.94rem; }
.paper summary { cursor: pointer; color: var(--accent); font-size: 0.88rem; }
.paper details p { margin: 8px 0 0; }

footer {
  border-top: 1px solid var(--rule);
  padding: 20px 0 40px;
  color: var(--muted);
  font-size: 0.8rem;
}