/* Theme variables */
:root {
  --bg: #ffffff;
  --text: #1a1a1a;
  --muted: #666666;
  --border: #e5e5e5;
  --surface: #f7f7f7;
  --primary: #111827;
  --shadow: 0 8px 30px rgba(0, 0, 0, 0.06);
}

/* Reset */
* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
  line-height: 1.6;
  color: var(--text);
  background-color: var(--bg);
}
img { max-width: 100%; height: auto; display: block; }
svg { width: 1em; height: 1em; }

/* Layout */
.container { max-width: 900px; margin: 0 auto; padding: 0 24px; }
main { min-height: calc(100vh - 140px); padding: 3rem 0; }

/* Navigation */
nav {
  position: sticky; top: 0; z-index: 50;
  background: rgba(255, 255, 255, 0.85);
  -webkit-backdrop-filter: saturate(180%) blur(8px);
  backdrop-filter: saturate(180%) blur(8px);
  border-bottom: 1px solid var(--border);
}
nav .container { display: flex; justify-content: space-between; align-items: center; padding: 0.75rem 0; }
.logo { font-size: 1.25rem; font-weight: 700; text-decoration: none; color: var(--text); letter-spacing: -0.01em; }
.nav-links { display: flex; list-style: none; gap: 2rem; }
nav a { text-decoration: none; color: var(--muted); transition: color 0.2s ease; font-weight: 500; }
nav a:hover, nav a.active { color: var(--text); }

/* Mobile nav */
.nav-toggle { display: none; width: 40px; height: 40px; border: 1px solid var(--border); border-radius: 8px; background: transparent; cursor: pointer; align-items: center; justify-content: center; }
.nav-toggle-bar { display: block; width: 18px; height: 2px; background: var(--text); }
.nav-toggle-bar + .nav-toggle-bar { margin-top: 4px; }

/* Typography */
h1 { font-size: 1.7rem; font-weight: 600; margin-bottom: 1rem; letter-spacing: -0.01em; }
h2 { font-size: 1.4rem; font-weight: 500; margin-bottom: 1rem; }
h3 { font-size: 1rem; font-weight: 500; margin-bottom: 0.5rem; }
p { font-size: 0.95rem; margin-bottom: 0.97rem; color: var(--muted); }
p a {color: var(--muted); text-decoration: underline dotted;}
p a:hover {color: var(--text); text-decoration: underline dotted; transition: 100ms; transition-timing-function: ease-in-out;}

/* Profile */
.profile { display: flex; gap: 2rem; margin-bottom: 2rem; align-items: flex-start; }
.profile-image { width: 100px; height: 100px; padding: 0.2em; border-radius: 9999px; object-fit: cover; box-shadow: 0 2px 4px rgba(0, 0, 0, 0.3); }
.profile-info h1 { margin-bottom: 0.25rem; }
.profile-info .title { color: var(--muted); margin-bottom: 0.5rem; }
.profile-info .email { font-size: 0.95rem; color: var(--muted); margin-bottom: 1rem; }
.note {text-decoration: underline;color: var(--text)}

/* Social links */
.social-links { display: flex; gap: 0rem; align-items: center; }
.social-links a { padding: 7px; color: var(--muted); text-decoration: none; transition: color 0.2s, transform 0.2s; font-size: 1.1rem; line-height: 1; display: inline-flex; align-items: center; border-radius: 6px; }
.social-links a:hover { color: var(--text); transform: translateY(-1px); }
.social-links svg { width: 18px; height: 18px; }

.cv-button { background: #fff; border: 1px solid var(--border); padding: 6px 12px; border-radius: 8px; font-size: 0.95rem; text-decoration: none; color: var(--text); transition: all 0.2s; display: inline-flex; align-items: center; gap: 8px; box-shadow: 0 1px 0 rgba(0,0,0,0.02); }
.cv-button:hover { background: #f9fafb; border-color: #d1d5db; transform: translateY(-1px); }
.cv-button svg { width: 16px; height: 16px; }

/* Inline icon links */
.link-with-icon { display: inline-flex; align-items: center; gap: 6px; }
.link-with-icon svg { width: 16px; height: 16px; flex: 0 0 16px; }

/* Publication */
.publication { display: flex; gap: 1rem; margin-bottom: 1rem; padding-bottom: 1rem; border-bottom: 1px solid var(--border); }
.publication:last-child { border-bottom: 0; }
.publication-icon { width: 44px; height: 44px; background: var(--surface); border: 1px solid var(--border); border-radius: 10px; flex-shrink: 0; display: flex; align-items: center; justify-content: center; font-size: 1rem; color: var(--muted); }
.publication-content h3 { margin-bottom: 0.35rem; }
.publication-content h3 a { color: var(--text); text-decoration: none; }
.publication-content h3 a:hover { text-decoration: underline; }
.authors { font-size: 0.9rem; color: var(--muted); margin-bottom: 0.35rem; }
.venue { font-size: 0.9rem; color: var(--muted); margin-bottom: 0.35rem; }
.publication-links { display: flex; gap: 0.7rem; font-size: 0.9rem; }
.publication-links a { color: var(--muted); text-decoration: none; display: inline-flex; align-items: center; gap: 5px; }
.publication-links a:hover { color: var(--text); text-decoration: underline; }

/* News */
.news-item { display: flex; gap: 1rem; margin-bottom: 0.75rem; }
.news-date { font-size: 0.9rem; color: var(--muted); width: 90px; flex-shrink: 0; }
.news-content { font-size: 0.95rem; }

/* Sections */
.section { margin-bottom: 2.5rem; }
.section-header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 1rem; }
.section-header a { font-size: 0.9rem; color: var(--muted); text-decoration: none; }
.section-header a:hover { color: var(--text); text-decoration: underline; }

/* Research lists */
.research-list { margin: 0; padding-left: 1.5rem; }
.research-list li { margin-bottom: 0.75rem; color: var(--muted); line-height: 1.6; }

/* Item cards */
.item { margin-bottom: 1.5rem; padding-bottom: 1.5rem; border-bottom: 1px solid var(--border); }
.item:last-child { border-bottom: 0; }
.item .meta { font-size: 0.9rem; color: var(--muted); margin-bottom: 0.5rem; }
.item .description { font-size: 0.95rem; color: var(--muted); }

/* Gallery */
.gallery-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(220px, 1fr)); gap: 1rem; }
.gallery-item img { width: 100%; border-radius: 12px; display: block; transition: transform 0.25s ease, box-shadow 0.25s ease; box-shadow: 0 1px 0 rgba(0,0,0,0.02); }
.gallery-item img:hover { transform: scale(1.02); box-shadow: var(--shadow); }
.gallery-item figcaption { font-size: 0.9rem; color: var(--muted); margin-top: 0.5rem; text-align: center; }

/* Footer */
.site-footer { border-top: 1px solid var(--border); padding: 2rem 0; text-align: center; color: var(--muted); font-size: 0.9rem; background: #fff; }

/* Responsive */
@media (max-width: 768px) {
  .container { padding: 0 16px; }
  nav .container { gap: 0.75rem; }
  .nav-toggle { display: inline-flex; }
  .nav-links { display: none; flex-direction: column; gap: 0.75rem; width: 100%; padding-top: 0.5rem; }
  .nav-links.open { display: flex; }
  nav ul li { text-align: center; }
  .profile { flex-direction: column; text-align: center; align-items: center; }
  h1 { font-size: 1.65rem; }
  h2 { font-size: 1.25rem; }
}

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
  * { transition: none !important; animation: none !important; }
}