:root {
  --text: #1f2328;
  --muted: #57606a;
  --rule: #d8dde3;
  --link: #2c5282;
  --link-hover: #1a365d;
  --bg: #fdfcf9;
  --max-width: 46rem;
}

* { box-sizing: border-box; }

html {
  font-size: 17px;
  scroll-behavior: smooth;
}

body {
  margin: 0;
  padding: 3rem 1.25rem 6rem;
  font-family: "Charter", "Iowan Old Style", "Palatino", "Georgia", serif;
  color: var(--text);
  background: var(--bg);
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}

main {
  max-width: var(--max-width);
  margin: 0 auto;
}

a {
  color: var(--link);
  text-decoration: none;
  border-bottom: 1px solid rgba(44, 82, 130, 0.25);
  transition: color 0.12s, border-color 0.12s;
}

a:hover {
  color: var(--link-hover);
  border-bottom-color: var(--link-hover);
}

a[href="#"] {
  color: var(--muted);
  border-bottom-style: dotted;
  border-bottom-color: var(--muted);
}

/* ---------- bio header ---------- */

.bio {
  margin-bottom: 2.5rem;
}

.bio h1 {
  font-size: 2rem;
  font-weight: 600;
  letter-spacing: -0.01em;
  margin: 0 0 0.25rem;
}

.bio .title {
  margin: 0;
  font-size: 1.05rem;
  font-style: italic;
  color: var(--muted);
}

.bio .affiliation {
  margin: 0.1rem 0 1rem;
  font-size: 1.05rem;
  color: var(--muted);
}

.bio .contact {
  margin: 0 0 1rem;
  font-size: 0.95rem;
  color: var(--muted);
  line-height: 1.5;
}

.bio .contact a {
  color: var(--link);
}

.bio .nav-links {
  margin: 0;
  font-size: 1rem;
}

/* ---------- section nav (jump-to-section bar under the bio) ---------- */

.section-nav {
  margin: 1.5rem 0 0;
  padding: 0.6rem 0;
  border-top: 1px solid var(--rule);
  border-bottom: 1px solid var(--rule);
  font-size: 1rem;
  text-align: center;
  color: var(--muted);
}

.section-nav a {
  display: inline-block;
  margin: 0 0.4rem;
  border-bottom: none;
  font-weight: 600;
}

.section-nav a:hover {
  border-bottom: 1px solid var(--link-hover);
}

/* ---------- sections ---------- */

section {
  margin-top: 2.75rem;
}

#overview {
  margin-top: 1.5rem;
  font-size: 1.02rem;
}

#overview p {
  margin: 0;
}

h2 {
  font-size: 1.25rem;
  font-weight: 600;
  letter-spacing: -0.005em;
  margin: 0 0 1.25rem;
  padding-bottom: 0.4rem;
  border-bottom: 1px solid var(--rule);
}

/* ---------- paper list ---------- */

ol.papers {
  list-style: none;
  margin: 0;
  padding: 0;
  counter-reset: paper;
}

ol.papers > li {
  position: relative;
  margin: 0 0 1.5rem;
  padding-left: 0;
}

ol.papers > li:last-child {
  margin-bottom: 0;
}

.paper-title {
  display: block;
  font-weight: 600;
  font-size: 1.02rem;
  color: var(--text);
  line-height: 1.4;
}

.authors {
  display: block;
  font-size: 0.95rem;
  color: var(--muted);
  margin-top: 0.15rem;
}

.meta {
  display: block;
  font-size: 0.95rem;
  color: var(--muted);
  margin-top: 0.1rem;
}

.links {
  display: block;
  font-size: 0.9rem;
  margin-top: 0.35rem;
  color: var(--muted);
}

.links a {
  font-variant: small-caps;
  letter-spacing: 0.02em;
}

/* ---------- footer ---------- */

footer {
  margin-top: 4rem;
  padding-top: 1rem;
  border-top: 1px solid var(--rule);
  font-size: 0.85rem;
  color: var(--muted);
}

footer p {
  margin: 0;
}

/* ---------- responsive ---------- */

@media (max-width: 40rem) {
  body { padding: 2rem 1rem 4rem; }
  html { font-size: 16px; }
  .bio h1 { font-size: 1.7rem; }
}