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

:root {
  --text:    #1a1a1a;
  --muted:   #6b6b6b;
  --border:  #e4e4e4;
  --bg:      #ffffff;
  --accent:  #1a1a1a;
  --max-w:   720px;
}

html { font-size: 16px; }

body {
  font-family: "Georgia", serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
}

/* ── Layout ── */
.site-header {
  position: sticky;
  top: 0;
  background: var(--bg);
  border-bottom: 1px solid var(--border);
  z-index: 100;
  padding: 0 2rem;
}

.header-inner {
  max-width: var(--max-w);
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 56px;
}

.site-name {
  font-family: "Georgia", serif;
  font-size: 1rem;
  font-weight: normal;
  letter-spacing: 0.01em;
  text-decoration: none;
  color: var(--text);
}

nav {
  display: flex;
  gap: 2rem;
}

nav a {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 0.85rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  text-decoration: none;
  color: var(--muted);
  transition: color 0.15s;
}

nav a:hover,
nav a.active {
  color: var(--text);
}

main {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 4rem 2rem 6rem;
}

/* ── Typography ── */
h1 {
  font-family: "Georgia", serif;
  font-size: 2rem;
  font-weight: normal;
  line-height: 1.3;
  margin-bottom: 0.25rem;
}

h2 {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--muted);
  margin: 3rem 0 1.25rem;
  padding-bottom: 0.5rem;
  border-bottom: 1px solid var(--border);
}

p {
  margin-bottom: 1.1rem;
  font-size: 1rem;
}

a {
  color: var(--text);
}

/* ── About page ── */
.about-grid {
  display: grid;
  grid-template-columns: 1fr 200px;
  gap: 3rem;
  align-items: start;
  margin-top: 2.5rem;
}

.about-photo {
  width: 100%;
  max-width: 200px;
  aspect-ratio: 3/4;
  object-fit: cover;
  object-position: top;
  filter: grayscale(10%);
}

.about-text .title {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 0.9rem;
  color: var(--muted);
  margin-bottom: 1.5rem;
}

/* ── Contact block ── */
.contact-block {
  margin-top: 3rem;
  padding-top: 2rem;
  border-top: 1px solid var(--border);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 0.875rem;
  color: var(--muted);
  line-height: 1.8;
}

.contact-block a {
  color: var(--text);
  text-decoration: none;
  border-bottom: 1px solid var(--border);
}

.contact-block a:hover {
  border-bottom-color: var(--text);
}

.contact-links {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  margin-top: 0.75rem;
}

/* ── Research page ── */
.research-area {
  margin-bottom: 2.5rem;
}

.research-area h3 {
  font-family: "Georgia", serif;
  font-size: 1.05rem;
  font-weight: normal;
  margin-bottom: 0.6rem;
}

/* ── Publications page ── */
.pub-list {
  list-style: none;
}

.pub-item {
  padding: 1.25rem 0;
  border-bottom: 1px solid var(--border);
}

.pub-item:first-child {
  border-top: 1px solid var(--border);
}

.pub-title {
  font-family: "Georgia", serif;
  font-size: 1rem;
  line-height: 1.5;
  margin-bottom: 0.3rem;
}

.pub-title a {
  text-decoration: none;
  color: var(--text);
  border-bottom: 1px solid var(--border);
  transition: border-color 0.15s;
}

.pub-title a:hover {
  border-bottom-color: var(--text);
}

.pub-meta {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 0.82rem;
  color: var(--muted);
}

.pub-year {
  display: inline-block;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 0.75rem;
  font-weight: 500;
  color: var(--muted);
  margin-right: 0.5rem;
}

/* ── Footer ── */
.site-footer {
  border-top: 1px solid var(--border);
  padding: 1.5rem 2rem;
  text-align: center;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 0.78rem;
  color: var(--muted);
}

/* ── Responsive ── */
@media (max-width: 600px) {
  .about-grid {
    grid-template-columns: 1fr;
  }
  .about-photo {
    max-width: 160px;
    order: -1;
  }
  nav { gap: 1.2rem; }
  h1 { font-size: 1.6rem; }
}