:root {
  --ink: #1e293b;
  --muted: #64748b;
  --paper: #ffffff;
  --paper-alt: #f1f5f9;
  --accent: #0d9488;
  --border: #cbd5e1;
  --serif: "Source Serif 4", Georgia, serif;
  --sans: "Inter", system-ui, sans-serif;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: var(--sans);
  color: var(--ink);
  background: var(--paper);
  line-height: 1.6;
}

.container {
  max-width: 860px;
  margin: 0 auto;
  padding: 0 24px;
}

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

h1, h2, h3 { font-family: var(--serif); line-height: 1.25; margin: 0 0 0.5em; }
h1 { font-size: 2.4rem; }
h2 { font-size: 1.6rem; margin-top: 0; }
h3 { font-size: 1.15rem; }

.site-header {
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  background: rgba(255,255,255,0.92);
  backdrop-filter: blur(6px);
  z-index: 10;
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 24px;
}

.brand {
  font-family: var(--serif);
  font-weight: 600;
  font-size: 1.1rem;
  color: var(--ink);
}
.brand:hover { text-decoration: none; }

.site-nav a {
  color: var(--muted);
  margin-left: 20px;
  font-size: 0.95rem;
}
.site-nav a:hover { color: var(--accent); text-decoration: none; }

.hero {
  display: flex;
  align-items: center;
  gap: 32px;
  padding: 64px 24px 48px;
  flex-wrap: wrap;
}

.hero-photo {
  flex: 0 0 auto;
  width: 180px;
  height: 180px;
  border-radius: 50%;
  background: var(--accent);
  color: #fff;
  font-family: var(--serif);
  font-size: 2rem;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.hero-photo img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.hero-text { flex: 1 1 320px; }
.hero-role { color: var(--muted); font-weight: 500; margin: 4px 0 4px; }
.hero-tagline { color: var(--accent); font-weight: 600; font-size: 0.95rem; margin: 0 0 12px; }
.hero-summary { max-width: 52ch; }

.hero-links { margin-top: 20px; display: flex; gap: 12px; flex-wrap: wrap; }

.button {
  display: inline-block;
  padding: 10px 18px;
  border-radius: 6px;
  background: var(--accent);
  color: #fff;
  font-weight: 500;
  font-size: 0.95rem;
}
.button:hover { text-decoration: none; opacity: 0.9; }

.button-outline {
  background: transparent;
  color: var(--accent);
  border: 1px solid var(--accent);
}

.section {
  padding: 40px 24px;
  border-top: 1px solid var(--border);
}

.tag-list {
  list-style: none;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}
.tag-list li {
  background: var(--paper-alt);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 6px 14px;
  font-size: 0.9rem;
}

.publication-list, .contact-list, .education-list {
  list-style: none;
  padding: 0;
}

.education-item {
  padding: 16px 0;
  border-bottom: 1px solid var(--border);
}
.education-degree { font-weight: 600; margin: 0 0 4px; }
.education-meta { color: var(--muted); margin: 0 0 8px; font-size: 0.92rem; }
.education-desc { margin: 0; }

.contact-note {
  color: var(--muted);
  font-size: 0.92rem;
  margin-top: 16px;
}

.publication {
  padding: 16px 0;
  border-bottom: 1px solid var(--border);
}
.publication-title { font-weight: 600; margin: 0 0 4px; }
.publication-meta { color: var(--muted); margin: 0 0 4px; font-size: 0.92rem; }
.publication-links { margin: 0; font-size: 0.9rem; }

.contact-list li { padding: 6px 0; }

.project-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 20px;
}

.project-list {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.project-card {
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 20px;
  background: var(--paper-alt);
}
.project-card h3 { margin-bottom: 8px; }

.project-subtitle {
  color: var(--muted);
  font-weight: 500;
  font-size: 0.95rem;
  margin: -4px 0 12px;
}

.placeholder-note {
  color: var(--muted);
  font-size: 0.88rem;
  font-style: italic;
}

.back-link {
  display: inline-block;
  margin-bottom: 20px;
  color: var(--muted);
  font-size: 0.9rem;
}
.back-link:hover { color: var(--accent); }

.project-detail h1 { font-size: 2rem; margin-bottom: 8px; }
.project-detail .project-subtitle { font-size: 1.05rem; margin-bottom: 20px; }
.project-detail .publication-meta { margin-top: 20px; }
.project-detail .project-links { margin-top: 24px; }

.site-footer {
  padding: 32px 24px;
  color: var(--muted);
  font-size: 0.88rem;
  border-top: 1px solid var(--border);
}

@media (max-width: 560px) {
  h1 { font-size: 1.9rem; }
  .hero { padding-top: 48px; }
  .hero-photo { width: 140px; height: 140px; }
}