/* ── Reset & Base ── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --bg: #fafaf8;
  --surface: #ffffff;
  --text: #1a1a1a;
  --muted: #6b6b6b;
  --accent: #1a56db;
  --accent-hover: #1240b0;
  --border: #e8e8e2;
  --max-w: 860px;
  --font-sans: 'Inter', system-ui, sans-serif;
  --font-serif: 'Crimson Pro', Georgia, serif;
}

html { scroll-behavior: smooth; }

body {
  font-family: var(--font-sans);
  background: var(--bg);
  color: var(--text);
  font-size: 15.5px;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

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

/* ── Nav ── */
#nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(250, 250, 248, 0.92);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 clamp(1.5rem, 5vw, 4rem);
  height: 52px;
}

.nav-name {
  font-weight: 600;
  font-size: 0.95rem;
  color: var(--text);
  letter-spacing: -0.01em;
}
.nav-name:hover { text-decoration: none; color: var(--accent); }

.nav-links { display: flex; gap: 1.6rem; }
.nav-links a {
  font-size: 0.875rem;
  color: var(--muted);
  font-weight: 400;
  transition: color .15s;
}
.nav-links a:hover { color: var(--accent); text-decoration: none; }

/* ── Shared layout ── */
.hero, .section, footer {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 3.5rem clamp(1.5rem, 5vw, 2rem);
}

/* ── Hero ── */
.hero {
  display: flex;
  align-items: flex-start;
  gap: 3.5rem;
  padding-top: 4rem;
  padding-bottom: 3rem;
  border-bottom: 1px solid var(--border);
}

.hero-text { flex: 1; }

.hero-text h1 {
  font-family: var(--font-serif);
  font-size: 2.6rem;
  font-weight: 600;
  letter-spacing: -0.02em;
  line-height: 1.15;
  margin-bottom: 0.35rem;
}

.tagline {
  font-family: var(--font-serif);
  font-style: italic;
  font-size: 1.1rem;
  color: var(--muted);
  margin-bottom: 1.25rem;
}

.hero-text p {
  color: #2a2a2a;
  margin-bottom: 0.9rem;
  max-width: 520px;
}

.links-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: 1.4rem;
}

.pill {
  display: inline-block;
  padding: 0.28rem 0.85rem;
  border: 1px solid var(--border);
  border-radius: 99px;
  font-size: 0.82rem;
  color: var(--text);
  background: var(--surface);
  transition: border-color .15s, background .15s, color .15s;
}
.pill:hover {
  background: var(--accent);
  border-color: var(--accent);
  color: white;
  text-decoration: none;
}

.hero-photo { flex-shrink: 0; width: 168px; }
.hero-photo img {
  width: 208px;
  height: 208px;
  border-radius: 50%;
  object-fit: cover;
  border: 3px solid var(--border);
  display: block;
}

/* ── Section headings ── */
.section { border-bottom: 1px solid var(--border); }
.section:last-of-type { border-bottom: none; }

h2 {
  font-family: var(--font-serif);
  font-size: 1.65rem;
  font-weight: 600;
  letter-spacing: -0.015em;
  margin-bottom: 1.1rem;
}

h3 { font-size: 1rem; font-weight: 500; }

.section p { color: #2a2a2a; margin-bottom: 0.85rem; max-width: 680px; }
.section-note { font-size: 0.85rem; color: var(--muted); margin-bottom: 1.2rem; }

/* ── Research interests list ── */
.interest-list {
  list-style: none;
  margin: 0.75rem 0 1rem 0;
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
}
.interest-list li {
  background: #f0f0ec;
  padding: 0.2rem 0.75rem;
  border-radius: 4px;
  font-size: 0.85rem;
  color: #333;
}

/* ── Research question blockquote ── */
blockquote.research-question {
  border-left: 3px solid var(--accent);
  margin: 1.2rem 0 1.4rem 0;
  padding: 0.75rem 1.2rem;
  background: #f4f6fd;
  border-radius: 0 6px 6px 0;
  font-family: var(--font-serif);
  font-style: italic;
  font-size: 1.05rem;
  color: #2a2a2a;
  line-height: 1.65;
  max-width: 680px;
}

/* ── Publications ── */
.year-group { margin-bottom: 2.2rem; }

.year-label {
  display: inline-block;
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--muted);
  border-left: 3px solid var(--accent);
  padding-left: 0.6rem;
  margin-bottom: 1.1rem;
}

.pub-list { display: flex; flex-direction: column; gap: 1.6rem; }

.pub {
  display: flex;
  gap: 1.4rem;
  align-items: flex-start;
  padding: 1.1rem 1.2rem;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: var(--surface);
  transition: box-shadow .2s, border-color .2s;
}
.pub:hover {
  box-shadow: 0 4px 18px rgba(0,0,0,0.07);
  border-color: #ccc;
}

/* ── Publication thumbnail ── */
.pub-thumb {
  flex-shrink: 0;
  cursor: zoom-in;
}

.thumb-placeholder {
  width: 130px;
  height: 105px;
  background: linear-gradient(135deg, #e8e8e2 0%, #d8d8d0 100%);
  border-radius: 6px;
}

.pub-thumb img {
  width: 130px;
  height: 105px;
  object-fit: cover;
  object-position: top center;
  border-radius: 6px;
  display: block;
  transition: opacity .15s;
}
.pub-thumb img:hover { opacity: 0.82; }

/* ── Lightbox ── */
#lightbox {
  display: none;
  position: fixed;
  inset: 0;
  z-index: 999;
  background: rgba(0, 0, 0, 0.85);
  align-items: center;
  justify-content: center;
  cursor: zoom-out;
}
#lightbox.open { display: flex; }

#lightbox img {
  max-width: 90vw;
  max-height: 88vh;
  border-radius: 8px;
  object-fit: contain;
  box-shadow: 0 12px 60px rgba(0, 0, 0, 0.6);
}

#lightbox-close {
  position: fixed;
  top: 1.2rem;
  right: 1.4rem;
  background: rgba(255,255,255,0.12);
  border: none;
  color: white;
  font-size: 1.5rem;
  line-height: 1;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background .15s;
}
#lightbox-close:hover { background: rgba(255,255,255,0.22); }

/* ── Teaching ── */
.teach-list {
  list-style: none;
  margin-top: 0.5rem;
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
}
.teach-list li {
  display: flex;
  align-items: baseline;
  gap: 0.75rem;
  font-size: 0.9rem;
}
.course-name { font-weight: 500; }
.course-term { color: var(--muted); font-size: 0.83rem; }

/* ── Footer ── */
footer {
  padding-top: 2rem;
  padding-bottom: 2.5rem;
  font-size: 0.84rem;
  color: var(--muted);
  line-height: 1.9;
}
footer a { color: var(--muted); }
footer a:hover { color: var(--accent); }
.muted { color: var(--muted); }
.small { font-size: 0.78rem; }

/* ── Responsive ── */
@media (max-width: 640px) {
  .hero {
    flex-direction: column-reverse;
    gap: 1.5rem;
    padding-top: 2.5rem;
  }
  .hero-photo { width: 110px; align-self: center; }
  .hero-photo img { width: 110px; height: 110px; }
  .hero-text h1 { font-size: 2rem; }
  .nav-links { gap: 1rem; }
  .pub { flex-direction: column; }
  .pub-thumb img, .thumb-placeholder { width: 100%; height: 80px; }
}