:root {
  --ink: #202020;
  --muted: #646464;
  --paper: #ffffff;
  --paper-deep: #f2f2f2;
  --accent: #246a9b;
  --accent-dark: #174d73;
  --line: #dddddd;
  --white: #ffffff;
  --sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --serif: var(--sans);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: var(--sans);
  font-size: 1rem;
  line-height: 1.7;
}
a { color: var(--accent-dark); text-underline-offset: 0.2em; }
a:hover { color: var(--accent); }
img { display: block; max-width: 100%; }
.shell { width: min(1120px, calc(100% - 2.5rem)); margin-inline: auto; }
.skip-link { position: fixed; left: 1rem; top: -5rem; z-index: 10; padding: 0.65rem 1rem; background: var(--ink); color: white; }
.skip-link:focus { top: 1rem; }

.site-header { border-bottom: 1px solid var(--line); }
.header-inner { min-height: 7rem; display: flex; align-items: center; justify-content: space-between; gap: 2rem; }
.brand { color: var(--ink); text-decoration: none; line-height: 1.15; }
.brand span { display: block; font-family: var(--sans); font-size: 1.3rem; font-weight: 700; }
.brand small { display: block; margin-top: 0.35rem; color: var(--muted); font-size: 0.73rem; letter-spacing: 0.08em; text-transform: uppercase; }
.nav-list, .footer-links, .profile-links { list-style: none; margin: 0; padding: 0; }
.nav-list { display: flex; flex-wrap: wrap; justify-content: flex-end; gap: 0.25rem 1.5rem; }
.nav-list a { color: var(--muted); font-size: 0.86rem; font-weight: 650; letter-spacing: 0.04em; text-decoration: none; text-transform: uppercase; }
.nav-list a:hover, .nav-list a[aria-current="page"] { color: var(--accent-dark); }

.page-shell { min-height: calc(100vh - 15rem); padding-block: clamp(3.5rem, 8vw, 7.5rem); }
.home-grid { display: grid; grid-template-columns: minmax(220px, 0.72fr) minmax(0, 1.8fr); gap: clamp(3rem, 8vw, 7rem); align-items: start; }
.profile { position: sticky; top: 2rem; }
.portrait { width: min(100%, 145px); height: auto; aspect-ratio: 1 / 1; border-radius: 50%; object-fit: cover; box-shadow: none; }
.eyebrow { margin: 0 0 1rem; color: var(--accent); font-size: 0.76rem; font-weight: 750; letter-spacing: 0.14em; text-transform: uppercase; }
.profile .eyebrow { margin-top: 2.25rem; }
.profile-focus { margin: 0 0 1.5rem; color: var(--muted); font-family: var(--sans); font-size: 1rem; line-height: 1.55; }
.profile-links { display: grid; gap: 0.3rem; }
.profile-links a { display: flex; justify-content: space-between; padding-block: 0.35rem; border-bottom: 1px solid var(--line); font-size: 0.84rem; font-weight: 700; text-decoration: none; text-transform: uppercase; }

h1, h2 { font-family: var(--sans); font-weight: 700; letter-spacing: -0.025em; line-height: 1.12; }
h1 { max-width: 900px; margin: 0 0 2rem; font-size: clamp(2.7rem, 6vw, 5.6rem); }
h1 em { color: var(--ink); font-style: normal; font-weight: 700; }
h2 { font-size: clamp(1.35rem, 2.4vw, 2rem); }
.intro { max-width: 760px; }
.intro p:not(.eyebrow), .narrow-page > p, .page-heading .lede { max-width: 740px; }
.lede { margin: 0 0 2rem; color: #333333; font-family: var(--sans); font-size: clamp(1.25rem, 2vw, 1.65rem); line-height: 1.5; }
.text-link { display: inline-block; margin-top: 1rem; font-weight: 750; text-decoration: none; border-bottom: 2px solid var(--accent); }

.page-heading { padding-bottom: clamp(2rem, 5vw, 4rem); border-bottom: 1px solid var(--line); }
.page-heading h1, .narrow-page h1 { font-size: clamp(3.5rem, 9vw, 7.5rem); }
.notice { display: inline-block; margin: 2.5rem 0 0; padding: 0.65rem 0.9rem; background: var(--paper-deep); color: var(--muted); font-size: 0.85rem; }
.publication-list { list-style: none; margin: 1rem 0 0; padding: 0; }
.publication { display: grid; grid-template-columns: 5rem 1fr; gap: clamp(1rem, 4vw, 3.5rem); padding-block: clamp(2rem, 4vw, 3rem); border-bottom: 1px solid var(--line); }
.publication-year { color: var(--muted); font-family: var(--sans); font-size: 1.25rem; font-weight: 700; }
.publication h2 { max-width: 820px; margin: 0 0 0.75rem; }
.publication p { margin: 0.25rem 0; }
.authors { color: #333333; }
.venue { color: var(--muted); font-size: 0.9rem; font-style: italic; }
.publication-links { display: flex; gap: 0.65rem; padding-top: 0.45rem; }
.publication-links a,
.publication-links button { padding: 0.16rem 0.6rem; border: 1px solid var(--line); background: var(--white); color: var(--accent-dark); font: inherit; font-size: 0.72rem; font-weight: 750; letter-spacing: 0.06em; line-height: 1.7; text-decoration: none; text-transform: uppercase; cursor: pointer; }
.publication-links a:hover,
.publication-links button:hover { border-color: var(--accent-dark); color: var(--accent-dark); }
.publication-links button[aria-expanded="true"] { background: var(--accent-dark); border-color: var(--accent-dark); color: var(--white); }
.publication-detail { margin-top: 0.8rem; padding: 0.8rem 1rem; background: var(--paper-deep); font-size: 0.75rem; line-height: 1.45; }
.publication-detail p { margin: 0; }
.publication-detail pre { margin: 0; overflow-x: auto; white-space: pre-wrap; font: 0.7rem/1.5 ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; }

.narrow-page { max-width: 820px; margin-inline: auto; }
.contact-card { display: flex; justify-content: space-between; gap: 2rem; margin-top: 3rem; padding: 1.5rem 0; border-block: 1px solid var(--line); font-family: var(--sans); font-size: clamp(1.2rem, 4vw, 2.25rem); font-weight: 700; text-decoration: none; }
.error-page { text-align: center; }
.error-page .lede { margin-inline: auto; }

.site-footer { border-top: 1px solid var(--line); color: var(--muted); font-size: 0.85rem; }
.footer-inner { min-height: 8rem; display: flex; align-items: center; justify-content: space-between; gap: 2rem; }
.footer-links { display: flex; flex-wrap: wrap; gap: 1.5rem; }
.footer-links a { color: inherit; text-decoration: none; }

@media (max-width: 760px) {
  .header-inner { align-items: flex-start; flex-direction: column; justify-content: center; padding-block: 1.5rem; }
  .nav-list { justify-content: flex-start; gap: 0.5rem 1rem; }
  .home-grid { grid-template-columns: 1fr; }
  .profile { position: static; display: grid; grid-template-columns: 4rem 1fr; gap: 0.5rem 1.5rem; align-items: center; }
  .portrait { grid-row: span 2; }
  .profile .eyebrow { align-self: end; margin: 0; }
  .profile-focus { align-self: start; margin: 0; font-size: 0.9rem; }
  .profile-links { grid-column: 1 / -1; margin-top: 1rem; }
  .publication { grid-template-columns: 1fr; gap: 0.5rem; }
  .footer-inner { align-items: flex-start; flex-direction: column; justify-content: center; gap: 0; padding-block: 1.25rem; }
}

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