:root {
  color-scheme: light dark;
  --paper: #f3efe6;
  --ink: #211e1b;
  --muted: #6d675f;
  --rule: #aaa297;
  --faint-rule: #d7d0c5;
  --accent: #a53422;
  --serif: Georgia, "Times New Roman", Times, serif;
  --sans: Arial, Helvetica, sans-serif;
  --hand: "Bradley Hand", "Segoe Print", Georgia, "Times New Roman", serif;
  --page: 88rem;
  --gutter: 2.5rem;
  font-synthesis: none;
  text-rendering: optimizeLegibility;
}

@media (prefers-color-scheme: dark) {
  :root {
    --paper: #181512;
    --ink: #eee8dd;
    --muted: #aaa197;
    --rule: #71685f;
    --faint-rule: #39332e;
    --accent: #e27661;
  }
}

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

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--serif);
  line-height: 1.5;
}

a {
  color: inherit;
  text-decoration-color: var(--accent);
  text-decoration-thickness: 1px;
  text-underline-offset: 0.3em;
}

a:hover { color: var(--accent); }

a:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 4px;
}

abbr[title] { text-decoration: none; }

.skip-link {
  position: fixed;
  z-index: 10;
  top: 1rem;
  left: 1rem;
  padding: 0.65rem 0.85rem;
  transform: translateY(-180%);
  background: var(--ink);
  color: var(--paper);
  font-family: var(--sans);
}

.skip-link:focus { transform: translateY(0); }

/* Header and footer */

.site-header,
.site-footer {
  width: min(calc(100% - 2 * var(--gutter)), var(--page));
  margin-inline: auto;
}

.site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 4.25rem;
  border-bottom: 1px solid var(--ink);
}

.monogram {
  color: var(--accent);
  font-size: 1.65rem;
  text-decoration: none;
}

/* The sticky "On this page" list replaces the header nav on wide screens. */
.site-nav { display: none; }

.nav-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem clamp(1.25rem, 4vw, 3rem);
  margin: 0;
  padding: 0;
  list-style: none;
  font-family: var(--sans);
  font-size: 0.78rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.nav-list a { text-decoration: none; }

.site-footer {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  gap: 2rem;
  align-items: center;
  min-height: 4.5rem;
  border-top: 1px solid var(--ink);
  font-size: 0.8rem;
}

.site-footer p { margin: 0; }
.site-footer a { justify-self: end; }
.footer-mark { color: var(--muted); font-style: italic; }

/* Page layout */

.page-grid {
  display: grid;
  grid-template-columns: 12rem minmax(0, 1fr);
  width: min(calc(100% - 2 * var(--gutter)), var(--page));
  margin-inline: auto;
  padding-block: 2rem 1.5rem;
}

.contents {
  border-right: 1px dotted var(--faint-rule);
  font-family: var(--sans);
}

.contents-inner {
  position: sticky;
  top: 1.5rem;
  padding: 1.25rem 2rem 2rem 0;
}

.contents ol {
  display: grid;
  gap: 0.9rem;
  margin: 1.2rem 0 0;
  padding: 0;
  list-style: none;
  font-size: 0.85rem;
}

.contents a {
  display: grid;
  grid-template-columns: 2rem 1fr;
  text-decoration: none;
}

.contents a span { color: var(--accent); }

.publication { min-width: 0; }

/* Shared type */

.label,
.kicker,
.entry-meta,
.tech-list {
  margin: 0;
  font-family: var(--sans);
  font-size: 0.75rem;
  font-style: normal;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.accent { color: var(--accent); }
.sep { color: var(--accent); }

.margin-note,
.entry-note {
  color: var(--accent);
  font-family: var(--hand);
  font-size: 1rem;
  font-style: italic;
  letter-spacing: 0.02em;
  line-height: 1.45;
}

.margin-note {
  max-width: 9rem;
  margin: 2.5rem 0 0;
  transform: rotate(-3deg);
}

h2 {
  margin: 0;
  font-size: 1.6rem;
  font-weight: 400;
}

/* Introduction */

.intro {
  display: grid;
  grid-template-columns: minmax(0, 1.45fr) minmax(16rem, 0.85fr);
  gap: clamp(2rem, 5vw, 5rem);
  padding: 1.25rem 0 2.5rem 3rem;
}

.kicker {
  color: var(--ink);
  line-height: 1.7;
}

h1 {
  margin: 0.6rem 0 0;
  font-size: clamp(4rem, 7.5vw, 7.25rem);
  font-weight: 400;
  letter-spacing: -0.055em;
  line-height: 0.9;
}

.accent-rule {
  width: 4.5rem;
  margin: 1.1rem 0 1rem;
  border-top: 2px solid var(--accent);
}

.lead {
  max-width: 39rem;
  margin: 0;
  font-size: clamp(1.2rem, 1.8vw, 1.55rem);
  line-height: 1.3;
}

.summary {
  max-width: 37rem;
  margin: 0.8rem 0 0;
  color: var(--muted);
  font-size: 1.05rem;
}

.profile-links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem 2.25rem;
  margin: 1.6rem 0 0;
  padding: 0;
  list-style: none;
  font-size: 1.05rem;
}

.file-hint {
  margin-left: 0.25em;
  color: var(--muted);
  font-family: var(--sans);
  font-size: 0.75rem;
  letter-spacing: 0.1em;
}

.methods {
  align-self: start;
  padding-left: 2.5rem;
  border-left: 1px solid var(--rule);
}

.methods dl { margin: 0.75rem 0 0; }

.methods dl > div {
  padding: 0.75rem 0;
  border-bottom: 1px solid var(--faint-rule);
}

.methods dt { font-size: 1.12rem; }

.methods dt span {
  display: inline-block;
  width: 2rem;
  color: var(--accent);
}

.methods dd {
  margin: 0.2rem 0 0 2rem;
  color: var(--muted);
  font-family: var(--sans);
  font-size: 0.82rem;
}

/* Sections */

.section {
  margin-left: 3rem;
  border-top: 1px solid var(--ink);
  scroll-margin-top: 1rem;
}

.section-title {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 0.9rem 0;
}

.section-title::after {
  content: "";
  flex: 1;
  border-top: 1px solid var(--rule);
}

.section-title span {
  color: var(--accent);
  font-size: 1.6rem;
}

/* Research and project entries */

.entry {
  display: grid;
  grid-template-columns: 3rem minmax(0, 1.25fr) minmax(0, 0.55fr) minmax(0, 0.6fr);
  gap: 1.5rem;
  align-items: start;
  padding: 1.2rem 0;
  border-top: 1px solid var(--faint-rule);
}

.entry-number {
  margin: 0;
  color: var(--accent);
  font-size: 1.65rem;
  line-height: 1.1;
}

.entry-copy { grid-column: 2; }

.entry-copy h3 {
  margin: 0.3rem 0 0.4rem;
  font-size: 1.35rem;
  font-weight: 400;
  line-height: 1.25;
}

.projects .entry-copy h3 {
  font-size: 2rem;
  line-height: 1.1;
}

.entry-copy h3 a { text-decoration: none; }

.entry-copy > p:last-child {
  max-width: 34rem;
  margin: 0;
}

.entry-note {
  grid-column: 3;
  margin: 0.6rem 0 0;
  transform: rotate(-2deg);
}

.entry .tech-list { grid-column: 4; }

.tech-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem 0.9rem;
  margin: 0.3rem 0 0;
  padding: 0;
  list-style: none;
}

/* Education */

.timeline {
  margin: 0;
  padding: 0;
  list-style: none;
}

.timeline > li,
.facts > div {
  display: grid;
  grid-template-columns: 9rem minmax(0, 1fr);
  gap: 1.5rem;
}

.timeline > li {
  padding: 1.1rem 0;
  border-top: 1px solid var(--faint-rule);
}

.when {
  margin: 0.4rem 0 0;
  color: var(--accent);
  font-family: var(--sans);
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.timeline h3 {
  margin: 0;
  font-size: 1.35rem;
  font-weight: 400;
  line-height: 1.25;
}

.where {
  margin: 0.2rem 0 0;
  color: var(--muted);
}

.detail {
  max-width: 46rem;
  margin: 0.5rem 0 0;
}

.facts {
  margin: 0;
  padding: 0.6rem 0 1.4rem;
  border-top: 1px solid var(--faint-rule);
}

.facts > div { padding: 0.5rem 0; }

.facts dt {
  padding-top: 0.2rem;
  color: var(--muted);
  font-family: var(--sans);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.facts dd { margin: 0; }

/* Contact */

.contact {
  display: grid;
  grid-template-columns: 13rem minmax(0, 0.9fr) minmax(0, 1.4fr);
  gap: 2rem;
  align-items: start;
  padding-bottom: 2rem;
}

.contact .section-title::after { display: none; }

.contact > p {
  max-width: 25rem;
  margin: 1.4rem 0 0;
  color: var(--muted);
}

.contact dl { margin: 1rem 0 0; }

.contact dl div {
  display: grid;
  grid-template-columns: 4.5rem minmax(0, 1fr);
  gap: 1rem;
  padding: 0.5rem 0;
  border-bottom: 1px solid var(--faint-rule);
}

.contact dt {
  padding-top: 0.15rem;
  color: var(--muted);
  font-family: var(--sans);
  font-size: 0.75rem;
}

.contact dd {
  min-width: 0;
  margin: 0;
  overflow-wrap: anywhere;
}

/* 404 page */

.hero {
  display: grid;
  align-content: center;
  min-height: calc(100svh - 1px);
  width: min(calc(100% - 3rem), 62rem);
  margin-inline: auto;
}

.hero h1 { max-width: 9ch; }
.hero-intro { max-width: 40rem; color: var(--muted); font-size: 1.3rem; }
.actions { margin-top: 1.5rem; }
.button { display: inline-block; padding: 0.7rem 1rem; border: 1px solid var(--ink); text-decoration: none; }
.button-primary { background: var(--accent); color: var(--paper); border-color: var(--accent); }
.button-primary:hover { color: var(--paper); }

/* Tablet: the sidebar gives way to the header nav. */
@media (max-width: 68rem) {
  .site-nav { display: block; }
  .page-grid { grid-template-columns: minmax(0, 1fr); }
  .contents { display: none; }
  .intro { padding-left: 0; }
  .section { margin-left: 0; }
  .contact { grid-template-columns: minmax(0, 1fr) minmax(0, 1.2fr); }
  .contact .section-title { grid-column: 1 / -1; }
  .contact > p, .contact dl { margin-top: 0; }
}

/* Narrow tablet and phone: entries collapse to number + one text column. */
@media (max-width: 56rem) {
  .entry {
    grid-template-columns: 2.5rem minmax(0, 1fr);
    gap: 0.5rem 1rem;
  }

  .entry-copy,
  .entry-note,
  .entry .tech-list { grid-column: 2; }

  .entry-note {
    margin: 0.1rem 0 0;
    transform: none;
  }

  .projects .entry-copy h3 { font-size: 1.75rem; }
}

@media (max-width: 48rem) {
  :root { --gutter: 1rem; }
  .site-header { align-items: flex-start; flex-direction: column; justify-content: center; gap: 0.7rem; padding-block: 1rem; }
  .nav-list { gap: 0.5rem 1rem; letter-spacing: 0.08em; }
  .page-grid { padding-top: 1.5rem; }
  .intro { grid-template-columns: minmax(0, 1fr); gap: 2.25rem; padding: 0.75rem 0 2.5rem; }
  h1 { font-size: clamp(3.5rem, 19vw, 6.5rem); }
  .methods { padding: 1.5rem 0 0; border-left: 0; border-top: 1px solid var(--rule); }
  .timeline > li, .facts > div { grid-template-columns: minmax(0, 1fr); gap: 0.35rem; }
  .when { margin-top: 0; }
  .contact { grid-template-columns: minmax(0, 1fr); gap: 0; }
  .contact dl { margin-top: 1rem; }
  .site-footer { grid-template-columns: 1fr auto; padding-block: 1rem; }
  .footer-mark { display: none; }
}

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