:root {
  --ink: #1a1a1a;
  --muted: #5a5a5a;
  --accent: #7b1113;
  --rule: #e5e5e5;
  --bg: #fdfdfb;
  --serif: "Source Serif Pro", "Georgia", "Times New Roman", serif;
  --sans: "Inter", -apple-system, "Helvetica Neue", Arial, sans-serif;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 17px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

.container {
  max-width: 880px;
  margin: 0 auto;
  padding: 40px 32px 80px;
}

/* Header / nav */
.site-header {
  padding-bottom: 28px;
  margin-bottom: 48px;
  border-bottom: 1px solid var(--rule);
}

.site-header nav {
  display: flex;
  flex-wrap: wrap;
  gap: 28px;
  font-size: 14px;
  letter-spacing: 0.02em;
  text-transform: uppercase;
}

.nav-link {
  color: var(--muted);
  text-decoration: none;
  transition: color 0.15s ease;
}

.nav-link:hover { color: var(--accent); }

/* Hero */
.hero {
  display: grid;
  grid-template-columns: 1fr 180px;
  gap: 40px;
  align-items: start;
  margin-bottom: 64px;
}

.hero h1 {
  font-family: var(--serif);
  font-size: 44px;
  font-weight: 600;
  letter-spacing: -0.01em;
  margin: 0 0 6px;
  color: var(--ink);
}

.hero .title {
  font-size: 17px;
  color: var(--ink);
  margin: 0 0 2px;
  font-weight: 500;
}

.hero .affiliation {
  font-size: 16px;
  color: var(--muted);
  margin: 0 0 20px;
}

.hero .bio {
  font-size: 16px;
  color: var(--ink);
  margin: 0 0 18px;
  max-width: 60ch;
}

.hero .links { font-size: 15px; margin: 0; }
.hero .links a {
  color: var(--accent);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: border-color 0.15s ease;
}
.hero .links a:hover { border-bottom-color: var(--accent); }
.hero .links .sep { color: var(--rule); margin: 0 10px; }

.hero-photo img {
  width: 180px;
  height: auto;
  border-radius: 2px;
  filter: grayscale(15%);
}

/* Sections */
section {
  margin-bottom: 56px;
}

section h2 {
  font-family: var(--serif);
  font-size: 22px;
  font-weight: 600;
  letter-spacing: 0.02em;
  text-transform: uppercase;
  color: var(--ink);
  margin: 0 0 20px;
  padding-bottom: 8px;
  border-bottom: 2px solid var(--ink);
  display: inline-block;
}

.section-intro {
  color: var(--ink);
  margin: 0 0 16px;
}

.tags {
  list-style: none;
  padding: 0;
  margin: 18px 0 0;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.tags li {
  font-size: 13px;
  padding: 5px 11px;
  background: #f0ece6;
  color: var(--ink);
  border-radius: 2px;
  letter-spacing: 0.01em;
}

/* Paper entries */
.paper {
  padding: 18px 0;
  border-bottom: 1px solid var(--rule);
}
.paper:last-child { border-bottom: none; }

.paper h3 {
  font-family: var(--serif);
  font-size: 19px;
  font-weight: 600;
  margin: 0 0 6px;
  line-height: 1.35;
}

.paper h3 a {
  color: var(--accent);
  text-decoration: none;
  border-bottom: 1px solid rgba(123, 17, 19, 0.35);
  transition: color 0.15s ease, border-color 0.15s ease;
}

.paper h3 a:hover {
  color: var(--accent);
  border-bottom-color: var(--accent);
}

.paper .authors a {
  color: var(--accent);
  text-decoration: none;
  border-bottom: 1px solid rgba(123, 17, 19, 0.35);
  transition: border-color 0.15s ease;
}

.paper .authors a:hover {
  border-bottom-color: var(--accent);
}

.paper .abstract,
.paper .presentations {
  line-height: 1.6;
}

.paper .abstract {
  font-size: 15px;
  color: var(--ink);
  margin: 10px 0 10px;
  text-align: justify;
}

.paper .presentations {
  font-size: 13.5px;
  color: var(--muted);
  margin: 8px 0 0;
  text-align: justify;
}

.paper .presentations strong {
  color: var(--ink);
  font-weight: 600;
}

.paper .authors {
  font-size: 15px;
  color: var(--muted);
  margin: 0 0 4px;
  font-style: italic;
}

.paper .venue {
  font-size: 15px;
  color: var(--ink);
  margin: 0 0 8px;
}

.paper-links {
  font-size: 14px;
  margin: 0;
}

.paper-links a {
  color: var(--accent);
  text-decoration: none;
  margin-right: 14px;
  border-bottom: 1px solid transparent;
  transition: border-color 0.15s ease;
}
.paper-links a:hover { border-bottom-color: var(--accent); }

.paper .award {
  font-size: 13px;
  color: var(--muted);
  margin: 6px 0 0;
}

/* Contact */
#contact p {
  margin: 0 0 8px;
  color: var(--ink);
}
#contact a { color: var(--accent); text-decoration: none; }
#contact a:hover { text-decoration: underline; }

/* Footer */
footer {
  margin-top: 80px;
  padding-top: 24px;
  border-top: 1px solid var(--rule);
  font-size: 13px;
  color: var(--muted);
  text-align: center;
}

/* Responsive */
@media (max-width: 640px) {
  .container { padding: 28px 20px 60px; }
  .hero {
    grid-template-columns: 1fr;
    gap: 24px;
  }
  .hero-photo { order: -1; }
  .hero-photo img { width: 140px; height: auto; }
  .hero h1 { font-size: 34px; }
  .site-header nav { gap: 18px; font-size: 13px; }
}