/* ---------- Theme tokens ---------- */
:root {
  --ink: #1c1917;
  --paper: #faf8f5;
  --muted: #78716c;
  --maroon: #6b1e1e;
  --rule: #1c1917;
  --nav-border: rgba(28, 25, 23, 0.1);

  --font-serif: Charter, 'Iowan Old Style', Georgia, 'Times New Roman', serif;
  --font-sans: -apple-system, BlinkMacSystemFont, 'Inter', 'Helvetica Neue', Helvetica, Arial, sans-serif;

  --content-max: 720px;
  --gutter: 24px;
}

/* ---------- Reset (minimal) ---------- */
*, *::before, *::after { box-sizing: border-box; }
body, h1, h2, h3, p, ul, ol, figure { margin: 0; }
ul, ol { padding-left: 1.2em; }
img { max-width: 100%; display: block; }
a { color: var(--maroon); text-decoration: underline; text-underline-offset: 2px; }
a:hover { text-decoration-thickness: 2px; }

/* ---------- Base ---------- */
html { scroll-behavior: smooth; }
body {
  font-family: var(--font-serif);
  font-size: 16px;
  line-height: 1.55;
  color: var(--ink);
  background: var(--paper);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

@media (max-width: 720px) {
  body { font-size: 15px; }
}

/* ---------- Layout primitives ---------- */
main {
  max-width: var(--content-max);
  margin: 0 auto;
  padding: 0 var(--gutter);
}

section { margin: 56px 0; }
@media (max-width: 720px) { section { margin: 40px 0; } }

/* ---------- Section heading pattern ---------- */
.section-label {
  font-family: var(--font-sans);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--maroon);
  border-top: 2px solid var(--rule);
  padding-top: 12px;
  margin-bottom: 16px;
}

/* ---------- Utility classes ---------- */
.muted { color: var(--muted); }
.sans { font-family: var(--font-sans); }

/* ---------- Skip link (accessibility) ---------- */
.skip-link {
  position: absolute;
  left: -9999px;
  top: auto;
  width: 1px;
  height: 1px;
  overflow: hidden;
}
.skip-link:focus {
  position: fixed;
  left: 12px;
  top: 12px;
  width: auto;
  height: auto;
  background: var(--ink);
  color: var(--paper);
  padding: 8px 12px;
  z-index: 1000;
  text-decoration: none;
}

/* ---------- Sticky top navigation ---------- */
.site-nav {
  position: sticky;
  top: 0;
  background: var(--paper);
  border-bottom: 1px solid var(--nav-border);
  z-index: 10;
}

.site-nav__inner {
  max-width: var(--content-max);
  margin: 0 auto;
  padding: 14px var(--gutter);
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 16px;
}

.site-nav__brand {
  font-family: var(--font-serif);
  font-size: 17px;
  font-weight: 700;
  color: var(--ink);
  text-decoration: none;
  letter-spacing: -0.3px;
}

.site-nav__links {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  gap: 18px;
  flex-wrap: wrap;
  font-family: var(--font-sans);
  font-size: 13px;
  font-weight: 500;
}

.site-nav__links a {
  color: var(--ink);
  text-decoration: none;
}

.site-nav__links a:hover {
  color: var(--maroon);
}

@media (max-width: 560px) {
  .site-nav__inner { padding: 10px var(--gutter); }
  .site-nav__brand { font-size: 15px; }
  .site-nav__links { gap: 12px; font-size: 12px; }
}

/* Scroll padding so anchor jumps don't hide behind sticky nav */
html { scroll-padding-top: 64px; }

/* ---------- Hero ---------- */
.hero {
  display: grid;
  grid-template-columns: 180px 1fr;
  gap: 28px;
  align-items: start;
  padding: 56px 0 24px;
}

.hero__photo img {
  width: 180px;
  height: 180px;
  object-fit: cover;
  background: #e7e5e4;
}

.hero__name {
  font-family: var(--font-serif);
  font-size: 48px;
  font-weight: 700;
  line-height: 0.98;
  letter-spacing: -1.2px;
  margin-bottom: 10px;
}

.hero__aff {
  font-family: var(--font-sans);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 16px;
}

.hero__tag {
  font-size: 16px;
  max-width: 52ch;
}

@media (max-width: 720px) {
  .hero {
    grid-template-columns: 1fr;
    padding: 32px 0 16px;
    gap: 20px;
    text-align: left;
  }
  .hero__photo img { width: 120px; height: 120px; }
  .hero__name { font-size: 36px; }
}

/* ---------- About ---------- */
.about__interests { margin-top: 14px; color: var(--muted); font-size: 14px; }
.about__interests-label {
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  color: var(--maroon);
}

/* ---------- Research ---------- */
.paper { margin-bottom: 28px; }
.paper:last-child { margin-bottom: 0; }

.paper__title {
  font-family: var(--font-serif);
  font-size: 18px;
  font-weight: 700;
  line-height: 1.3;
  margin-bottom: 4px;
}

.paper__meta {
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 1px;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 10px;
}

.paper__abstract {
  font-size: 15px;
  margin-bottom: 8px;
}

.paper__links {
  font-family: var(--font-sans);
  font-size: 13px;
}

/* ---------- CV ---------- */
.cv-line { display: flex; align-items: center; gap: 14px; flex-wrap: wrap; }
.cv-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-weight: 700;
  font-size: 16px;
}
.cv-icon { color: var(--maroon); }
.cv-updated { font-size: 12px; }

/* ---------- Teaching ---------- */
.teaching-list { list-style: none; padding: 0; margin: 0; }
.course {
  padding: 10px 0;
  border-bottom: 1px solid var(--nav-border);
  display: flex;
  flex-direction: column;
  gap: 2px;
}
.course:last-child { border-bottom: 0; }
.course__title { font-weight: 700; font-size: 15px; }
.course__meta {
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 1px;
  text-transform: uppercase;
  color: var(--muted);
}

/* ---------- Contact ---------- */
.contact__email { font-size: 17px; font-weight: 600; margin-bottom: 0; }

/* ---------- Footer ---------- */
.site-footer {
  margin-top: 56px;
  border-top: 1px solid var(--nav-border);
}
.site-footer__inner {
  max-width: var(--content-max);
  margin: 0 auto;
  padding: 20px var(--gutter) 40px;
  display: flex;
  justify-content: space-between;
  gap: 16px;
  font-family: var(--font-sans);
  font-size: 12px;
}
@media (max-width: 560px) {
  .site-footer__inner { flex-direction: column; gap: 4px; }
}