:root {
  --text: #1a1a1a;
  --bg: #ffffff;
  --muted: #555;
  --border: #ddd;
  --serif: 'Libre Baskerville', 'Georgia', 'Times New Roman', serif;
  --sans: 'Inter', -apple-system, sans-serif;
}

* { margin: 0; padding: 0; box-sizing: border-box; }

body {
  font-family: var(--serif);
  color: var(--text);
  background: var(--bg);
  line-height: 1.65;
  font-size: 16px;
}

.container {
  max-width: 720px;
  margin: 0 auto;
  padding: 60px 24px;
}

/* Header */
header { margin-bottom: 48px; }

header h1 {
  font-size: 26px;
  font-weight: 700;
  letter-spacing: -0.3px;
  margin-bottom: 4px;
}

header h1 a {
  color: var(--text);
  text-decoration: none;
}

header .affiliation {
  font-size: 15px;
  color: var(--muted);
}

/* Navigation */
nav {
  margin-bottom: 48px;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--border);
}

nav a {
  font-family: var(--sans);
  font-size: 14px;
  color: var(--muted);
  text-decoration: none;
  margin-right: 28px;
  letter-spacing: 0.2px;
  transition: color 0.2s;
}

nav a:hover, nav a.active {
  color: var(--text);
}

/* Homepage list */
.home-list {
  list-style: none;
  padding: 0;
}

.home-list li {
  margin-bottom: 8px;
}

.home-list a {
  font-size: 16px;
  color: var(--text);
  text-decoration: none;
  transition: color 0.2s;
}

.home-list a:hover { color: var(--muted); }

/* Section headings */
h2 {
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 24px;
  margin-top: 48px;
  color: var(--text);
}

h2:first-of-type { margin-top: 0; }

/* Paper list */
.paper { margin-bottom: 28px; }

.paper .title {
  font-weight: 600;
  font-size: 15px;
  line-height: 1.5;
}

.paper .authors {
  font-size: 14px;
  color: var(--muted);
  margin-top: 2px;
}

.paper .venue {
  font-size: 14px;
  color: var(--muted);
  font-style: italic;
  margin-top: 2px;
}

.paper .paper-links {
  margin-top: 5px;
}

.paper .paper-links a {
  font-family: var(--sans);
  font-size: 12px;
  color: var(--muted);
  text-decoration: none;
  margin-right: 14px;
  transition: color 0.2s;
}

.paper .paper-links a:hover { color: var(--text); }

/* Abstract toggle */
.paper details { margin-top: 6px; }

.paper details summary {
  font-family: var(--sans);
  font-size: 12px;
  color: var(--muted);
  cursor: pointer;
  display: inline;
  transition: color 0.2s;
}

.paper details summary:hover { color: var(--text); }

.paper details p {
  font-size: 13px;
  line-height: 1.6;
  color: var(--muted);
  margin-top: 8px;
  padding-left: 0;
  max-width: 620px;
}

/* Teaching */
.course { margin-bottom: 20px; }

.course .course-name {
  font-weight: 600;
  font-size: 15px;
}

.course .semesters {
  font-size: 14px;
  color: var(--muted);
  margin-top: 2px;
}

/* CV */
.cv-download { margin-top: 24px; }

.cv-download a {
  font-family: var(--sans);
  font-size: 14px;
  color: var(--text);
  text-decoration: none;
  border-bottom: 1px solid var(--border);
  padding-bottom: 2px;
  transition: border-color 0.2s;
}

.cv-download a:hover { border-color: var(--text); }

.cv-embed {
  margin-top: 24px;
  border: 1px solid var(--border);
}

/* Footer */
footer {
  margin-top: 64px;
  padding-top: 20px;
  border-top: 1px solid var(--border);
  font-family: var(--sans);
  font-size: 13px;
  color: var(--muted);
}

footer a {
  color: var(--muted);
  text-decoration: none;
}

footer a:hover { color: var(--text); }

@media (max-width: 600px) {
  .container { padding: 32px 16px; }
  header h1 { font-size: 22px; }
  nav a { margin-right: 16px; font-size: 13px; }
}