:root {
  --ink: #1a1a1a;
  --muted: #5b6470;
  --line: #e6e8ec;
  --bg: #ffffff;
  --bg-soft: #f7f8fa;
  --accent: #0072b2;        /* Okabe-Ito blue, colorblind-safe */
  --accent-dark: #005a8f;
  --maxw: 860px;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  color: var(--ink);
  background: var(--bg);
  font-family: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
  font-size: 17px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

.wrap { max-width: var(--maxw); margin: 0 auto; padding: 0 24px; }

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

/* ---------- Top nav ---------- */
.topnav {
  position: sticky; top: 0; z-index: 10;
  background: rgba(255,255,255,0.88);
  backdrop-filter: saturate(180%) blur(10px);
  border-bottom: 1px solid var(--line);
}
.nav-inner { display: flex; align-items: center; justify-content: space-between; height: 60px; }
.brand {
  font-family: "Newsreader", Georgia, serif;
  font-size: 21px; font-weight: 600; color: var(--ink);
}
.brand:hover { text-decoration: none; color: var(--accent); }
.topnav nav { display: flex; gap: 22px; }
.topnav nav a {
  color: var(--muted); font-size: 14.5px; font-weight: 500;
}
.topnav nav a:hover { color: var(--accent); text-decoration: none; }

/* ---------- Hero ---------- */
.hero {
  display: grid; grid-template-columns: 200px 1fr; gap: 40px;
  align-items: start; padding: 64px 0 32px;
}
.hero-photo img {
  width: 200px; height: 240px; object-fit: cover;
  border-radius: 10px; border: 1px solid var(--line);
}
.hero-photo.noimg {
  width: 200px; height: 240px; border-radius: 10px;
  background: linear-gradient(160deg, #eef1f5, #dfe4ea);
}
.hero-text h1 {
  font-family: "Newsreader", Georgia, serif;
  font-size: 44px; line-height: 1.05; margin: 0 0 6px; font-weight: 600;
  letter-spacing: -0.01em;
}
.tagline { font-size: 19px; margin: 0 0 2px; color: var(--ink); font-weight: 500; }
.affil { margin: 0 0 18px; color: var(--muted); font-size: 15px; }
.lede { margin: 0 0 14px; }
.lede a { font-weight: 500; }

.actions { display: flex; gap: 12px; margin: 22px 0 16px; flex-wrap: wrap; }
.btn {
  display: inline-block; padding: 9px 18px; border-radius: 8px;
  background: var(--accent); color: #fff; font-weight: 500; font-size: 15px;
  border: 1px solid var(--accent);
}
.btn:hover { background: var(--accent-dark); border-color: var(--accent-dark); text-decoration: none; color: #fff; }
.btn.ghost { background: transparent; color: var(--accent); }
.btn.ghost:hover { background: var(--bg-soft); color: var(--accent-dark); }
.contact { color: var(--muted); font-size: 15px; margin: 8px 0 0; }

/* ---------- Sections ---------- */
section { padding: 30px 0; border-top: 1px solid var(--line); }
#about { border-top: 0; }
h2 {
  font-family: "Newsreader", Georgia, serif;
  font-size: 28px; font-weight: 600; margin: 0 0 22px;
  letter-spacing: -0.01em;
}
h3 { font-size: 16px; letter-spacing: 0.04em; text-transform: uppercase; color: var(--muted); margin: 0 0 12px; }

/* ---------- Bio ---------- */
.bio-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 40px; }
.timeline { list-style: none; margin: 0; padding: 0; }
.timeline li { margin-bottom: 14px; font-size: 15.5px; line-height: 1.5; }
.years { display: block; font-weight: 600; color: var(--accent); font-size: 13.5px; }

/* ---------- Publications ---------- */
.pub { margin: 0 0 20px; }
.pub .cite { margin: 0; }
.pub.numbered { display: grid; grid-template-columns: 42px 1fr; gap: 4px; }
.pub .num { color: var(--muted); font-variant-numeric: tabular-nums; font-weight: 600; }
.status {
  display: inline-block; margin-left: 4px;
  font-style: italic; color: var(--accent-dark);
}
details { margin-top: 6px; }
summary {
  cursor: pointer; color: var(--accent); font-size: 14px; font-weight: 500;
  width: fit-content;
}
summary:hover { color: var(--accent-dark); }
.abstract {
  margin: 8px 0 0; padding: 12px 16px;
  background: var(--bg-soft); border-radius: 8px;
  font-size: 15px; color: #33383f; line-height: 1.6;
}
.media { margin: 6px 0 0; padding-left: 18px; }
.media li { font-size: 14px; color: var(--muted); margin-bottom: 2px; }
.year-group { margin-bottom: 26px; }
.year-group .year {
  font-family: "Newsreader", Georgia, serif; text-transform: none;
  letter-spacing: 0; color: var(--ink); font-size: 20px;
  border-bottom: 1px solid var(--line); padding-bottom: 4px; margin-bottom: 14px;
}
.err { color: #b00020; font-size: 15px; }

/* ---------- Footer ---------- */
footer { border-top: 1px solid var(--line); padding: 28px 0 40px; margin-top: 20px; }
footer p { color: var(--muted); font-size: 14px; margin: 0; }

/* ---------- Responsive ---------- */
@media (max-width: 680px) {
  body { font-size: 16px; }
  .topnav nav { display: none; }
  .hero { grid-template-columns: 1fr; gap: 24px; padding: 40px 0 24px; }
  .hero-photo img, .hero-photo.noimg { width: 140px; height: 168px; }
  .hero-text h1 { font-size: 36px; }
  .bio-grid { grid-template-columns: 1fr; gap: 24px; }
  .pub.numbered { grid-template-columns: 34px 1fr; }
}