:root {
  --bg: #fafafa;
  --bg-alt: #f0f0f0;
  --text: #222;
  --text-muted: #555;
  --link: #0066cc;
  --link-hover: #004499;
  --border: #ddd;
  --max-width: 720px;
}

[data-theme="dark"] {
  --bg: #1a1a1a;
  --bg-alt: #252525;
  --text: #e0e0e0;
  --text-muted: #aaa;
  --link: #6db3f2;
  --link-hover: #8ec5f5;
  --border: #333;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #1a1a1a;
    --bg-alt: #252525;
    --text: #e0e0e0;
    --text-muted: #aaa;
    --link: #6db3f2;
    --link-hover: #8ec5f5;
    --border: #333;
  }
}

*, *::before, *::after {
  box-sizing: border-box;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
}

body {
  margin: 0;
  padding: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  font-size: 1rem;
  line-height: 1.7;
  color: var(--text);
  background: var(--bg);
  transition: background 0.2s, color 0.2s;
}

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 2rem 1.5rem;
}

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

header {
  margin-bottom: 2.5rem;
  padding-bottom: 1.5rem;
  border-bottom: 1px solid var(--border);
}

header h1 {
  margin: 0 0 1rem 0;
  font-size: 2rem;
  font-weight: 600;
}

.social-links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem 1.25rem;
  align-items: center;
}
.social-links a {
  font-size: 0.9rem;
}

#theme-toggle {
  background: none;
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 0.25rem 0.5rem;
  font-size: 0.85rem;
  color: var(--text-muted);
  cursor: pointer;
  transition: border-color 0.2s, color 0.2s;
}
#theme-toggle:hover {
  border-color: var(--text-muted);
  color: var(--text);
}
.icon-dark { display: none; }
[data-theme="dark"] .icon-light { display: none; }
[data-theme="dark"] .icon-dark { display: inline; }
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) .icon-light { display: none; }
  :root:not([data-theme="light"]) .icon-dark { display: inline; }
}
[data-theme="light"] .icon-light { display: inline; }
[data-theme="light"] .icon-dark { display: none; }

section {
  margin-bottom: 2.5rem;
}

h2 {
  font-size: 1.4rem;
  font-weight: 600;
  margin: 0 0 1rem 0;
  padding-bottom: 0.5rem;
  border-bottom: 1px solid var(--border);
}

.pub-list, .project-list {
  list-style: none;
  padding: 0;
  margin: 0;
}

.pub-list li, .project-list li {
  margin-bottom: 1.25rem;
  padding-bottom: 1.25rem;
  border-bottom: 1px solid var(--border);
}
.pub-list li:last-child, .project-list li:last-child {
  margin-bottom: 0;
  padding-bottom: 0;
  border-bottom: none;
}

.pub-list strong, .project-list strong {
  font-weight: 600;
}

.authors {
  color: var(--text-muted);
  font-size: 0.9rem;
}
.authors em {
  color: var(--text);
  font-style: normal;
}

.venue {
  color: var(--text-muted);
  font-size: 0.9rem;
  font-style: italic;
}

.features {
  color: var(--text-muted);
  font-size: 0.9rem;
}

footer {
  margin-top: 2rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--border);
  text-align: center;
  color: var(--text-muted);
  font-size: 0.9rem;
}

@media (max-width: 600px) {
  html { font-size: 15px; }
  .container { padding: 1.5rem 1rem; }
  header h1 { font-size: 1.75rem; }
  .social-links { gap: 0.5rem 1rem; }
}