:root {
  --paper: #ffffff;
  --ink: #202630;
  --navy: #17324d;
  --burgundy: #7a263a;
  --emerald: #276653;
  --muted: #68717a;
  --line: #dedede;
  --serif: "Source Serif 4", Georgia, serif;
  --sans: "Source Sans 3", Arial, sans-serif;
  --page: min(980px, calc(100vw - 64px));
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}
a { color: var(--burgundy); text-underline-offset: 3px; }
a:hover, a:focus { color: var(--emerald); }
img { display: block; max-width: 100%; }
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}
.skip-link {
  position: fixed;
  left: 16px;
  top: -80px;
  z-index: 100;
  background: var(--navy);
  color: white;
  padding: 10px 16px;
}
.skip-link:focus { top: 16px; color: white; }

.site-header {
  width: var(--page);
  min-height: 82px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid var(--line);
}
.wordmark {
  color: var(--navy);
  font-family: var(--serif);
  font-size: 27px;
  font-weight: 500;
  line-height: 1;
  text-decoration: none;
}
.wordmark:hover, .wordmark:focus { color: var(--navy); }
.site-nav { display: flex; align-items: center; gap: 27px; }
.site-nav a {
  color: #3e4852;
  font-size: 14px;
  font-weight: 500;
  text-decoration: none;
}
.site-nav a:hover, .site-nav a:focus { color: var(--burgundy); }
.menu-button { display: none; }

main { width: var(--page); margin: 0 auto; }
.intro {
  padding: 74px 0 84px;
  display: grid;
  grid-template-columns: 260px minmax(0, 1fr);
  gap: clamp(48px, 7vw, 82px);
  align-items: start;
}
.portrait-wrap { margin: 0; }
.portrait-wrap img {
  width: 100%;
  aspect-ratio: 4 / 5;
  object-fit: cover;
  object-position: 50% 30%;
}
h1, h2 {
  color: var(--navy);
  font-family: var(--serif);
  font-weight: 500;
  line-height: 1.15;
}
h1 { margin: -5px 0 24px; font-size: 42px; }
h2 { margin: 0 0 38px; font-size: 36px; }
.about p { max-width: 640px; margin: 0 0 18px; color: #3e4852; }
.about .about-lead { color: var(--ink); font-size: 19px; line-height: 1.55; }
.interests { display: flex; flex-wrap: wrap; gap: 9px; margin-top: 28px; }
.interests span, .topics span {
  border: 1px solid #a9c0b7;
  color: var(--emerald);
  padding: 4px 9px;
  font-size: 12px;
  line-height: 1.5;
}

.section { padding: 72px 0 78px; border-top: 1px solid var(--line); }
.research-group + .research-group { margin-top: 48px; }
.research-group h3 {
  margin: 0 0 12px;
  color: var(--navy);
  font-size: 14px;
  font-weight: 600;
  letter-spacing: .04em;
  text-transform: uppercase;
}
.publication-list { margin: 0; padding-left: 24px; }
.publication-list li { padding: 14px 0 17px 8px; }
.publication-list li + li { border-top: 1px solid #ececec; }
.publication-list li::marker { color: var(--burgundy); }
.publication-list p { margin: 0; line-height: 1.7; }
.publication-list strong { color: var(--navy); font-weight: 600; }
.topics { display: flex; flex-wrap: wrap; gap: 7px; margin-top: 10px; }
.topics span { border: 0; background: #f1f6f4; padding: 3px 8px; font-size: 11px; }

.updates { padding-bottom: 70px; }
.updates-list { margin: 0; padding: 0; list-style: none; }
.updates-list li {
  display: grid;
  grid-template-columns: 78px minmax(0, 1fr);
  gap: 20px;
  padding: 15px 0;
  border-top: 1px solid #ececec;
}
.updates-list li:last-child { border-bottom: 1px solid #ececec; }
.updates-list time { color: var(--burgundy); font-size: 13px; font-weight: 600; }
.updates-list p { margin: 0; }

footer {
  width: var(--page);
  margin: 0 auto;
  padding: 30px 0 42px;
  display: flex;
  justify-content: flex-start;
  gap: 28px;
  border-top: 1px solid var(--line);
  color: var(--muted);
}
.footer-links { display: flex; flex-wrap: wrap; gap: 22px; }
.footer-links a { color: var(--navy); font-size: 13px; font-weight: 500; }
.footer-links a:hover, .footer-links a:focus { color: var(--burgundy); }
footer p { margin: 0; font-size: 12px; }

@media (max-width: 760px) {
  :root { --page: calc(100vw - 36px); }
  .site-header { min-height: 70px; }
  .menu-button {
    display: grid;
    gap: 6px;
    width: 40px;
    height: 40px;
    padding: 11px 8px;
    border: 0;
    background: transparent;
  }
  .menu-button > span:not(.sr-only) { display: block; height: 1px; background: var(--navy); }
  .site-nav {
    position: absolute;
    z-index: 20;
    top: 70px;
    left: 18px;
    right: 18px;
    display: none;
    align-items: stretch;
    flex-direction: column;
    gap: 0;
    padding: 14px 20px;
    background: white;
    border: 1px solid var(--line);
    box-shadow: 0 10px 28px rgba(23, 50, 77, .1);
  }
  .site-nav.open { display: flex; }
  .site-nav a { padding: 9px 0; }
  .intro { padding: 50px 0 62px; grid-template-columns: 1fr; gap: 36px; }
  .portrait-wrap { max-width: 260px; }
  h1 { font-size: 37px; }
  h2 { font-size: 31px; }
  .section { padding: 58px 0 62px; }
  footer { flex-direction: column; }
}

@media (max-width: 480px) {
  .portrait-wrap { max-width: 220px; }
  .updates-list li { grid-template-columns: 1fr; gap: 3px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
}