:root {
  --ink: #1a1a1a;
  --muted: #5a5a5a;
  --line: #dddddd;
  --accent: #1F3864;
  --bg: #fdfdfc;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: Georgia, 'Times New Roman', serif;
  color: var(--ink);
  background: var(--bg);
  line-height: 1.6;
}
.wrap {
  max-width: 1040px;
  margin: 0 auto;
  padding: 48px 24px 96px;
}

/* Nav */
nav.site-nav {
  border-bottom: 1px solid var(--line);
}
nav.site-nav .nav-inner {
  max-width: 720px;
  margin: 0 auto;
  padding: 20px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-family: Helvetica, Arial, sans-serif;
}
nav.site-nav .nav-name {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--ink);
  text-decoration: none;
  letter-spacing: 0.2px;
}
nav.site-nav ul {
  list-style: none;
  display: flex;
  gap: 22px;
  margin: 0;
  padding: 0;
}
nav.site-nav a.nav-link {
  color: var(--muted);
  text-decoration: none;
  font-size: 0.82rem;
  text-transform: uppercase;
  letter-spacing: 1.2px;
  padding-bottom: 3px;
  border-bottom: 2px solid transparent;
}
nav.site-nav a.nav-link:hover {
  color: var(--accent);
}
nav.site-nav a.nav-link.active {
  color: var(--accent);
  border-bottom: 2px solid var(--accent);
}

/* Header block (page title area) — used on Research / Teaching / CV pages */
header.page-header {
  margin-bottom: 40px;
  padding-bottom: 24px;
  border-bottom: 1px solid var(--line);
}
h1 {
  font-size: 2rem;
  margin: 0 0 6px;
  font-weight: 500;
  letter-spacing: 0.2px;
}
.role {
  color: var(--muted);
  font-size: 1.05rem;
  margin: 0 0 14px;
}
.contact {
  font-family: Helvetica, Arial, sans-serif;
  font-size: 0.9rem;
  color: var(--muted);
}
.contact a {
  color: var(--accent);
  text-decoration: none;
}
.contact a:hover { text-decoration: underline; }
.contact span:not(:last-child)::after {
  content: "  \00b7  ";
  color: var(--line);
}

/* Home page hero */
.hero {
  display: flex;
  flex-direction: row;
  align-items: flex-start;
  gap: 32px;
  margin-bottom: 8px;
  padding-bottom: 32px;
  border-bottom: 1px solid var(--line);
}
.avatar-placeholder {
  flex: 0 0 400px;
  width: 400px;
  height: auto;
  border-radius: 8px;
  border: 1px solid var(--line);
  object-fit: cover;
  display: block;
}
.hero-copy {
  flex: 1 1 auto;
  min-width: 0;
}
.hero-copy { width: 100%; }
.hero-copy { flex: 1 1 auto; min-width: 0; }
.hero-name {
  font-size: 1.6rem;
  margin: 0 0 4px;
  font-weight: 500;
  letter-spacing: 0.2px;
}
.hero-role {
  color: var(--muted);
  font-size: 1rem;
  margin: 0 0 14px;
}
.hero-copy p { font-size: 0.98rem; }
.hero-links {
  font-family: Helvetica, Arial, sans-serif;
  font-size: 0.85rem;
  margin-top: 6px;
}
.hero-links a {
  color: var(--accent);
  text-decoration: none;
}
.hero-links a:hover { text-decoration: underline; }

@media (max-width: 640px) {
  .hero { flex-direction: column; }
  .avatar-placeholder { width: 100%; flex-basis: auto; }
}

/* CV & Contact page */
.cv-block { margin-bottom: 30px; }
.cv-block h2 { margin-bottom: 10px; }
.cv-block a.file-link {
  display: inline-block;
  color: var(--accent);
  text-decoration: none;
  border-bottom: 1px solid var(--accent);
  font-size: 0.98rem;
}
.cv-block a.file-link:hover { opacity: 0.75; }
.contact-list {
  font-family: Helvetica, Arial, sans-serif;
  font-size: 0.95rem;
  color: #333;
}
.contact-list div { margin-bottom: 8px; }
.contact-list a { color: var(--accent); text-decoration: none; }
.contact-list a:hover { text-decoration: underline; }

section {
  margin-bottom: 36px;
}
h2 {
  font-family: Helvetica, Arial, sans-serif;
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 1.5px;
  color: var(--accent);
  margin: 0 0 14px;
}
p { margin: 0 0 12px; }

.paper { margin-bottom: 28px; }
.paper-title { font-weight: 700; margin-bottom: 3px; }
.paper-meta {
  font-style: italic;
  color: var(--muted);
  font-size: 0.85rem;
  margin-bottom: 8px;
}
.paper-abstract { font-size: 0.85rem; color: #333; }
.paper-tag {
  display: inline-block;
  font-family: Helvetica, Arial, sans-serif;
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--accent);
  border: 1px solid var(--accent);
  border-radius: 3px;
  padding: 2px 7px;
  margin-bottom: 10px;
}

ul.plain { margin: 0; padding-left: 18px; }
ul.plain li { margin-bottom: 8px; }

.teach-entry { margin-bottom: 22px; }
.teach-title { font-weight: 700; margin-bottom: 2px; }
.teach-meta {
  font-style: italic;
  color: var(--muted);
  font-size: 0.92rem;
  margin-bottom: 6px;
}
.teach-desc { font-size: 0.95rem; color: #333; }

footer.site-footer {
  margin-top: 48px;
  padding-top: 20px;
  border-top: 1px solid var(--line);
  font-family: Helvetica, Arial, sans-serif;
  font-size: 0.8rem;
  color: var(--muted);
}