:root {
  --ink: #1c1c1c;
  --muted: #5b5f66;
  --accent: #990000;
  --accent-light: #f5e6e6;
  --border: #e4e2dd;
  --bg: #fdfcfa;
  --max-width: 960px;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: "Georgia", "Iowan Old Style", "Palatino Linotype", serif;
  color: var(--ink);
  background: var(--bg);
  line-height: 1.65;
}

.wrap {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

/* Header */
.site-header {
  padding: 56px 0 28px;
  border-bottom: 1px solid var(--border);
}

.site-header h1 {
  margin: 0;
  font-size: 2.1rem;
  font-weight: 600;
  letter-spacing: 0.01em;
}

.site-header .tagline {
  margin: 8px 0 0;
  color: var(--accent);
  font-style: italic;
  font-size: 1.05rem;
}

/* Nav */
.site-nav {
  position: sticky;
  top: 0;
  background: var(--bg);
  border-bottom: 1px solid var(--border);
  z-index: 10;
}

.site-nav .wrap {
  display: flex;
  gap: 24px;
  flex-wrap: wrap;
  padding-top: 16px;
  padding-bottom: 16px;
}

.site-nav a {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 0.88rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--muted);
  text-decoration: none;
}

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

.site-nav a.active {
  color: var(--accent);
  font-weight: 700;
}

/* Page layout: sidebar + content */
.page-layout {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 48px 24px 60px;
  display: flex;
  align-items: flex-start;
  gap: 56px;
}

/* Sidebar */
.sidebar {
  flex: 0 0 200px;
  position: sticky;
  top: 88px;
  text-align: center;
}

.sidebar-photo {
  width: 200px;
  height: 200px;
  border-radius: 50%;
  object-fit: cover;
  border: 3px solid var(--accent-light);
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.08);
  display: block;
  margin: 0 auto 20px;
}

.social-links {
  list-style: none;
  display: inline-block;
  text-align: left;
  margin: 0;
  padding: 0;
}

.social-links li {
  margin-bottom: 10px;
}

.social-links a {
  display: flex;
  align-items: center;
  gap: 9px;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 0.85rem;
  color: var(--muted);
  border-bottom: none;
}

.social-links a i {
  width: 16px;
  text-align: center;
  color: var(--accent);
  font-size: 1rem;
}

.social-links a:hover {
  color: var(--accent);
}

@media (max-width: 600px) {
  .page-layout {
    flex-direction: column;
    align-items: stretch;
    gap: 28px;
    padding-top: 36px;
  }
  .sidebar {
    position: static;
    flex: none;
    display: flex;
    align-items: center;
    gap: 20px;
    text-align: left;
  }
  .sidebar-photo {
    margin: 0;
    flex: 0 0 auto;
    width: 200px;
    height: 200px;
  }
  .social-links {
    display: block;
  }
}

/* Main content */
.site-main {
  flex: 1 1 auto;
  min-width: 0;
  max-width: 640px;
}

section {
  padding-bottom: 20px;
}

h2 {
  font-size: 1.4rem;
  margin: 0 0 18px;
  padding-bottom: 8px;
  border-bottom: 2px solid var(--accent);
  display: inline-block;
}

h3 {
  font-size: 1.05rem;
  color: var(--accent);
  margin: 26px 0 10px;
  font-weight: 600;
}

p { margin: 0 0 16px; }

a {
  color: var(--accent);
  text-decoration: none;
  border-bottom: 1px solid var(--accent-light);
}

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

ul {
  margin: 0 0 16px;
  padding-left: 20px;
}

li {
  margin-bottom: 10px;
}

.pub-list li, .talk-list li {
  padding-left: 2px;
}

/* Responsive */
@media (max-width: 480px) {
  .site-header { padding: 40px 0 20px; }
  .site-header h1 { font-size: 1.7rem; }
  .site-nav .wrap { gap: 14px; }
}