*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

:root {
  --text: #e8eef2;
  --muted: #8aaabb;
  --accent: #90c8e0;
  --border: #4a6272;
  --max-width: 720px;
}

html {
  font-size: 16px;
}

body {
  font-family: Georgia, "Times New Roman", serif;
  color: var(--text);
  background: #3a4a57;
  line-height: 1.65;
  padding: 0 1.25rem;
}

/* ── Navigation ── */

nav {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 1.5rem 0 1rem;
  display: flex;
  align-items: baseline;
  gap: 0.25rem 1.75rem;
  flex-wrap: wrap;
  border-bottom: 1px solid var(--border);
}

nav .site-name {
  font-size: 1rem;
  font-weight: normal;
  font-family: Georgia, "Times New Roman", serif;
  color: var(--text);
  text-decoration: none;
  margin-right: auto;
}

nav a {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
  font-size: 0.875rem;
  color: var(--muted);
  text-decoration: none;
  letter-spacing: 0.02em;
}

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

nav a.active {
  color: var(--text);
  border-bottom: 2px solid var(--text);
  padding-bottom: 1px;
}

/* ── Main content ── */

main {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 2.5rem 0 4rem;
}

/* ── About page ── */

.about-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2.5rem;
  align-items: start;
}

.photo {
  display: block;
  width: 100%;
  border-radius: 2px;
}

@media (max-width: 560px) {
  .about-layout {
    grid-template-columns: 1fr;
  }
}


h1 {
  font-size: 1.6rem;
  font-weight: normal;
  margin-bottom: 0.25rem;
  line-height: 1.25;
}

.subtitle {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
  font-size: 0.875rem;
  color: var(--muted);
  margin-bottom: 1.5rem;
}

p {
  margin-bottom: 1rem;
}

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

p a:hover {
  text-decoration: underline;
}

.contact-links {
  margin-top: 1.5rem;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
  font-size: 0.875rem;
}

.contact-links a {
  color: var(--accent);
  text-decoration: none;
}

.contact-links a:hover {
  text-decoration: underline;
}

.contact-links span {
  color: var(--border);
  margin: 0 0.4rem;
}

/* ── Research page ── */

h2 {
  font-size: 1rem;
  font-weight: normal;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 1.5rem;
  padding-bottom: 0.4rem;
  border-bottom: 1px solid var(--border);
}

.paper-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 2rem;
}

.paper {
  /* no extra style needed */
}

.paper-title {
  font-size: 1rem;
  font-weight: normal;
  margin-bottom: 0.2rem;
}

.paper-title a {
  color: var(--accent);
  text-decoration: none;
}

.paper-title a:hover {
  text-decoration: underline;
}

.paper-meta {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
  font-size: 0.8rem;
  color: var(--muted);
  margin-bottom: 0.5rem;
}

.paper-abstract {
  font-size: 0.9rem;
  color: var(--muted);
}

.paper-links {
  margin-top: 0.4rem;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
  font-size: 0.8rem;
}

.paper-links a {
  color: var(--accent);
  text-decoration: none;
  margin-right: 0.75rem;
}

.paper-links a:hover {
  text-decoration: underline;
}

section + section {
  margin-top: 3rem;
}

/* ── CV page ── */

.cv-header {
  margin-bottom: 2rem;
}

.cv-download {
  margin-top: 0.75rem;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
  font-size: 0.875rem;
}

.cv-download a {
  color: var(--accent);
  text-decoration: none;
}

.cv-download a:hover {
  text-decoration: underline;
}

.cv-section {
  margin-bottom: 2.5rem;
}

.cv-row {
  display: grid;
  grid-template-columns: 100px 1fr;
  gap: 0.25rem 1.5rem;
  margin-bottom: 1rem;
  font-size: 0.95rem;
}

.cv-year {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
  font-size: 0.8rem;
  color: var(--muted);
  padding-top: 0.15rem;
}

.cv-detail strong {
  font-weight: normal;
  font-style: italic;
}

.cv-detail .institution {
  font-style: normal;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
  font-size: 0.85rem;
  color: var(--muted);
}

/* ── Footer ── */

footer {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 1.5rem 0;
  border-top: 1px solid var(--border);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
  font-size: 0.8rem;
  color: var(--muted);
}

/* ── Mobile ── */

@media (max-width: 560px) {
  .cv-row {
    grid-template-columns: 70px 1fr;
  }
}