:root {
  --bg: #ffffff;
  --fg: #1f2328;
  --muted: #5b636e;
  --line: #e6e8eb;
  --accent: #2563eb;
  --accent-soft: #eef3fe;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0f1115;
    --fg: #e6e8eb;
    --muted: #9aa3ad;
    --line: #262a31;
    --accent: #7aa7ff;
    --accent-soft: #18202e;
  }
}

* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font: 17px/1.65 system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", sans-serif;
}

main {
  max-width: 720px;
  margin: 0 auto;
  padding: 72px 24px 48px;
}

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; text-underline-offset: 3px; }

/* Header */
.hero {
  display: flex;
  align-items: center;
  gap: 32px;
  margin-bottom: 40px;
}

.avatar {
  width: 140px;
  height: 140px;
  flex-shrink: 0;
  border-radius: 50%;
  object-fit: cover;
  border: 1px solid var(--line);
}

h1 {
  margin: 0;
  font-size: 2rem;
  line-height: 1.2;
  letter-spacing: -0.02em;
}

.cjk {
  margin-left: 6px;
  font-size: 1.25rem;
  font-weight: 400;
  color: var(--muted);
}

.role {
  margin: 6px 0 14px;
  color: var(--muted);
}

.links { display: flex; flex-wrap: wrap; gap: 8px; }

.links a {
  padding: 3px 12px;
  border-radius: 999px;
  background: var(--accent-soft);
  font-size: 0.875rem;
  font-weight: 500;
}
.links a:hover { text-decoration: none; filter: brightness(0.96); }

/* Sections */
section p { margin: 0 0 16px; }

h2 {
  margin: 48px 0 20px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--line);
  font-size: 1.15rem;
  letter-spacing: -0.01em;
}

/* Publications */
.pubs { list-style: none; margin: 0; padding: 0; }

.pubs li {
  display: flex;
  flex-direction: column;
  gap: 2px;
  margin-bottom: 26px;
}

.venue {
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--accent);
}

.pubs .title {
  color: var(--fg);
  font-weight: 600;
  line-height: 1.4;
}

.authors { color: var(--muted); font-size: 0.925rem; }
.authors b { color: var(--fg); font-weight: 600; }

.extra { display: flex; flex-wrap: wrap; gap: 14px; font-size: 0.875rem; }

/* Service */
.service { list-style: none; margin: 0; padding: 0; }

.service li {
  display: grid;
  grid-template-columns: 3.25rem 1fr;
  align-items: baseline;
  margin-bottom: 14px;
}

.service a { font-weight: 600; }

.year {
  color: var(--muted);
  font-size: 0.925rem;
  font-variant-numeric: tabular-nums;
}

.desc { display: block; color: var(--muted); font-size: 0.875rem; }

footer {
  margin-top: 56px;
  padding-top: 16px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 0.8rem;
}

@media (max-width: 560px) {
  main { padding-top: 40px; }
  .hero { flex-direction: column; align-items: flex-start; gap: 20px; }
  .avatar { width: 112px; height: 112px; }
  .cjk { display: block; margin: 4px 0 0; }
}