:root {
  --text: #2b2b2b;
  --heading: #1a3a5c;
  --link: #1a5a8a;
  --muted: #6b7280;
  --border: #e5e7eb;
  --bg: #ffffff;
  --accent-bg: #f4f7fa;
}

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

html { font-size: 17px; }

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  color: var(--text);
  background: var(--bg);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

header.site-header {
  border-bottom: 1px solid var(--border);
  background: var(--bg);
}

.container {
  max-width: 780px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

nav.site-nav {
  padding: 1.15rem 0;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
}

nav.site-nav .brand {
  font-weight: 600;
  color: var(--heading);
  text-decoration: none;
  font-size: 1.05rem;
  letter-spacing: 0.01em;
}

nav.site-nav ul {
  list-style: none;
  display: flex;
  gap: 1.5rem;
}

nav.site-nav a {
  color: var(--text);
  text-decoration: none;
  font-size: 0.95rem;
  padding-bottom: 2px;
  border-bottom: 2px solid transparent;
  transition: color 0.15s, border-color 0.15s;
}

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

nav.site-nav a.active {
  color: var(--heading);
  border-bottom-color: var(--link);
}

main {
  padding: 2.5rem 0 3rem;
}

h1 {
  font-size: 2rem;
  color: var(--heading);
  margin-bottom: 0.35rem;
  font-weight: 700;
  letter-spacing: -0.015em;
}

h2 {
  font-size: 1.3rem;
  color: var(--heading);
  margin: 2.5rem 0 1rem;
  font-weight: 600;
  padding-bottom: 0.35rem;
  border-bottom: 1px solid var(--border);
}

h3 {
  font-size: 1.08rem;
  margin: 0 0 0.35rem;
  color: var(--heading);
  font-weight: 600;
}

p {
  margin-bottom: 1rem;
}

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

a:hover {
  text-decoration: underline;
}

.subtitle {
  color: var(--text);
  font-size: 1.05rem;
  margin-bottom: 0.15rem;
}

.affiliation {
  color: var(--muted);
  font-size: 0.95rem;
  margin-bottom: 1.5rem;
}

.jm-banner {
  background: var(--accent-bg);
  border-left: 3px solid var(--link);
  padding: 0.7rem 1rem;
  margin: 1.25rem 0 2rem;
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--heading);
  border-radius: 2px;
}

.paper {
  margin-bottom: 2rem;
}

.paper .meta {
  color: var(--muted);
  font-size: 0.9rem;
  margin-bottom: 0.6rem;
}

.paper .meta a {
  color: var(--link);
  font-weight: 500;
}

.paper .abstract {
  font-size: 0.95rem;
  margin-top: 0.5rem;
  text-align: justify;
  hyphens: auto;
}

.paper .keywords {
  color: var(--muted);
  font-size: 0.85rem;
  margin-top: 0.55rem;
  font-style: italic;
}

.paper .award-note {
  color: var(--muted);
  font-size: 0.9rem;
  font-style: italic;
  margin-top: 0.55rem;
  padding-left: 0.75rem;
  border-left: 2px solid var(--border);
}

.contact-list {
  list-style: none;
  padding: 0;
  margin: 1rem 0;
}

.contact-list li {
  padding: 0.3rem 0;
  font-size: 0.98rem;
}

.contact-list li .placeholder {
  color: #b0b6bd;
  font-style: italic;
}

ul.plain {
  padding-left: 1.25rem;
  margin: 0.5rem 0 1rem;
}

ul.plain li {
  margin-bottom: 0.5rem;
}

.field-tag {
  display: inline-block;
  color: var(--muted);
  font-size: 0.95rem;
  margin-bottom: 1.5rem;
}

.cv-download {
  margin: 1.5rem 0 1.25rem;
}

.cv-contact {
  color: var(--muted);
  font-size: 0.95rem;
}

.btn {
  display: inline-block;
  background: var(--link);
  color: #ffffff;
  padding: 0.6rem 1.15rem;
  border-radius: 4px;
  font-weight: 500;
  font-size: 0.95rem;
  text-decoration: none;
  transition: background 0.15s;
}

.btn:hover {
  background: var(--heading);
  text-decoration: none;
}

.footer {
  margin-top: 4rem;
  padding: 1.5rem 0;
  border-top: 1px solid var(--border);
  color: var(--muted);
  font-size: 0.85rem;
  text-align: center;
}

@media (max-width: 600px) {
  html { font-size: 16px; }
  nav.site-nav {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.75rem;
  }
  nav.site-nav ul {
    gap: 1.1rem;
    flex-wrap: wrap;
  }
  h1 { font-size: 1.6rem; }
  h2 { font-size: 1.18rem; }
  .paper .abstract { text-align: left; }
}