@import url('https://fonts.googleapis.com/css2?family=Libre+Baskerville:wght@400;700&family=Source+Sans+3:wght@400;500;600;700&display=swap');

:root {
  --blue: #6f9fbd;
  --blue-dark: #a8c8d9;
  --ink: #e3e7e6;
  --muted: #b5bdbb;
  --light: #26302f;
  --line: #3b4543;
  --page: #1b2221;
  --panel: #222b29;
  --max: 1050px;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  color: var(--ink);
  background: var(--page);
  font-family: "Source Sans 3", Arial, sans-serif;
  font-size: 17px;
  line-height: 1.65;
}

a { color: var(--blue); }
a:hover { color: var(--blue-dark); }

.container {
  width: min(calc(100% - 44px), var(--max));
  margin: 0 auto;
}

.site-header {
  background: var(--page);
  border-bottom: 1px solid var(--line);
}

.nav {
  min-height: 76px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.brand {
  color: var(--ink);
  text-decoration: none;
  font-family: "Libre Baskerville", Georgia, serif;
  font-size: 1.2rem;
  font-weight: 700;
}

.nav-links {
  display: flex;
  gap: 25px;
  align-items: center;
}

.nav-links a {
  color: #c3cac8;
  text-decoration: none;
  font-size: .95rem;
}

.nav-links a:hover,
.nav-links .active {
  color: var(--blue);
}

.menu-toggle {
  display: none;
  background: var(--page);
  border: 1px solid var(--line);
  padding: 6px 11px;
}

h1, h2, h3 {
  font-family: "Libre Baskerville", Georgia, serif;
  font-weight: 700;
  line-height: 1.25;
  color: #e8eceb;
}

h1 {
  font-size: clamp(2.5rem, 5vw, 4.2rem);
  margin: 0 0 22px;
}

h2 {
  font-size: clamp(1.75rem, 3vw, 2.45rem);
  margin: 0 0 20px;
}

h3 {
  font-size: 1.3rem;
  margin: 0 0 8px;
}

.section-kicker {
  color: var(--blue);
  font-size: .8rem;
  font-weight: 700;
  letter-spacing: .06em;
  text-transform: uppercase;
  margin: 0 0 10px;
}

.page-hero {
  padding: 72px 0 60px;
  border-bottom: 1px solid var(--line);
}

.page-hero p:last-child {
  max-width: 760px;
  color: var(--muted);
  font-size: 1.08rem;
  margin: 0;
}

.hero {
  padding: 76px 0 68px;
  border-bottom: 1px solid var(--line);
}

.hero h1 {
  max-width: 820px;
}

.hero-title {
  font-family: "Source Sans 3", Arial, sans-serif;
  color: var(--blue);
  font-size: 1.25rem;
  font-weight: 600;
  margin: -5px 0 22px;
}

.hero-copy {
  max-width: 800px;
  color: var(--muted);
  font-size: 1.08rem;
  margin: 0;
}

.hero-links {
  margin-top: 25px;
}

.hero-links a {
  margin-right: 22px;
  font-weight: 600;
}

.cover-strip {
  height: 170px;
  overflow: hidden;
  border-bottom: 1px solid var(--line);
}

.cover-strip img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center 45%;
  filter: saturate(.45);
}

.section {
  padding: 68px 0;
}

.section + .section {
  border-top: 1px solid var(--line);
}

.light-section {
  background: var(--light);
}

.two-col {
  display: grid;
  grid-template-columns: 1fr 1.65fr;
  gap: 70px;
}

.prose {
  color: var(--muted);
}

.prose p {
  margin: 0 0 1.15em;
}

.section-intro {
  max-width: 760px;
  color: var(--muted);
  margin: -5px 0 32px;
}

.research-list {
  border-top: 1px solid var(--line);
}

.research-item {
  display: grid;
  grid-template-columns: 45px 1fr;
  gap: 20px;
  padding: 30px 0;
  border-bottom: 1px solid var(--line);
}

.research-number {
  color: var(--blue);
  font-weight: 600;
  font-size: .9rem;
}

.research-item p {
  margin: 0;
  color: var(--muted);
}

.research-item h3 {
  margin-bottom: 9px;
}

.timeline {
  border-top: 1px solid var(--line);
}

.timeline-item {
  display: grid;
  grid-template-columns: 155px 1fr;
  gap: 25px;
  padding: 22px 0;
  border-bottom: 1px solid var(--line);
}

.timeline-item span {
  color: var(--muted);
  font-size: .9rem;
}

.timeline-item h3 {
  font-family: "Source Sans 3", Arial, sans-serif;
  font-size: 1.15rem;
  margin: 0 0 4px;
}

.timeline-item p {
  color: var(--muted);
  margin: 0;
}

.project-list {
  border-top: 1px solid var(--line);
}

.project-row {
  display: grid;
  grid-template-columns: 45px 1fr;
  gap: 20px;
  padding: 22px 0;
  border-bottom: 1px solid var(--line);
  text-decoration: none;
}

.project-index {
  color: var(--blue);
}

.project-row strong {
  color: var(--ink);
  display: block;
}

.project-row small {
  color: var(--muted);
}

.paper-card {
  padding: 0 0 38px;
  margin-bottom: 38px;
  border-bottom: 1px solid var(--line);
}

.paper-card:last-child {
  margin-bottom: 0;
}

.paper-meta {
  color: var(--blue);
  font-size: .85rem;
  font-weight: 600;
  margin: 0 0 8px;
}

.paper-card h2 {
  font-size: 1.8rem;
}

.paper-card p {
  color: var(--muted);
}

.paper-card img {
  display: block;
  max-width: 100%;
  max-height: 520px;
  margin: 24px auto;
}

.external {
  font-weight: 600;
  text-decoration: none;
}

.talks {
  border-top: 1px solid var(--line);
}

.talk-card {
  padding: 22px 0;
  border-bottom: 1px solid var(--line);
}

.talk-card h3 {
  font-family: "Source Sans 3", Arial, sans-serif;
  font-size: 1.15rem;
  margin-bottom: 3px;
}

.talk-card p {
  margin: 0;
  color: var(--muted);
}

.cv-panel {
  display: grid;
  grid-template-columns: 1.5fr 1fr;
  gap: 70px;
  align-items: center;
  padding: 35px 0;
}

.cv-actions {
  padding-left: 45px;
  border-left: 1px solid var(--line);
}

.button {
  display: inline-block;
  background: var(--blue);
  color: #fff;
  padding: 9px 15px;
  text-decoration: none;
  font-weight: 600;
  border-radius: 2px;
}

.button:hover {
  color: #fff;
  background: var(--blue-dark);
}

.small-note {
  color: var(--muted);
  font-size: .85rem;
}

.cv-frame {
  width: 100%;
  height: 900px;
  border: 1px solid var(--line);
}

.teaching-list {
  border-top: 1px solid var(--line);
}

.course-card {
  padding: 24px 0;
  border-bottom: 1px solid var(--line);
}

.course-card h3 {
  font-family: "Source Sans 3", Arial, sans-serif;
  font-size: 1.15rem;
}

.course-card p {
  color: var(--muted);
  margin: 0;
}

.quote-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 35px 55px;
}

.quote-card {
  padding: 0 0 22px;
  border-bottom: 1px solid var(--line);
}

.quote-card p {
  font-family: "Libre Baskerville", Georgia, serif;
  font-size: .98rem;
  margin: 0 0 8px;
}

.quote-card small {
  color: var(--muted);
}

.blog-layout {
  display: grid;
  grid-template-columns: 180px 1fr;
  gap: 55px;
}

.blog-side {
  align-self: start;
}

.blog-side a {
  display: block;
  padding: 8px 0;
  text-decoration: none;
  border-bottom: 1px solid var(--line);
}

.blog-post {
  max-width: 760px;
}

.blog-post h2 {
  font-size: 2.3rem;
}

.blog-post p {
  color: var(--muted);
}

.post-date {
  color: var(--blue) !important;
  font-size: .85rem;
}

.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
}

.email {
  display: inline-block;
  font-family: "Libre Baskerville", Georgia, serif;
  font-size: 1.35rem;
  margin: 10px 0 20px;
}

.socials {
  display: flex;
  gap: 20px;
}

.socials a {
  text-decoration: none;
}

.math {
  font-family: "Libre Baskerville", Georgia, serif;
  background: var(--light);
  border-left: 3px solid var(--blue);
  padding: 15px 18px;
  overflow-x: auto;
}

footer {
  border-top: 1px solid var(--line);
  padding: 24px 0;
  color: var(--muted);
  font-size: .85rem;
}

.footer-inner {
  display: flex;
  justify-content: space-between;
}

/* Keep the site conventional and readable on smaller screens. */
@media (max-width: 800px) {
  .nav-links {
    display: none;
    position: absolute;
    top: 76px;
    left: 0;
    right: 0;
    background: var(--page);
    padding: 18px 22px;
    flex-direction: column;
    align-items: flex-start;
    gap: 11px;
    border-bottom: 1px solid var(--line);
  }

  .nav-links.open { display: flex; }
  .menu-toggle { display: block; }

  .hero, .page-hero { padding: 55px 0 45px; }

  .two-col,
  .contact-grid,
  .cv-panel,
  .blog-layout {
    grid-template-columns: 1fr;
    gap: 35px;
  }

  .timeline-item {
    grid-template-columns: 1fr;
    gap: 3px;
  }

  .cv-actions {
    padding: 25px 0 0;
    border-left: 0;
    border-top: 1px solid var(--line);
  }

  .quote-grid { grid-template-columns: 1fr; }
  .cv-frame { height: 700px; }
  .footer-inner { flex-direction: column; gap: 5px; }
}

.site-header { background: #202827; border-bottom-color: #3b4543; }
.brand { color: #edf1f0; }
.nav-links a { color: #b9c2bf; }
.nav-links a:hover, .nav-links .active { color: #9fc2d5; }
.menu-toggle { background: #202827; color: #e3e7e6; border-color: #4a5552; }
.cover-strip { background: #202827; }
.section + .section { border-top-color: #3b4543; }
.button { background: #5f8da8; }
.button:hover { background: #769fba; }
a { color: #8fb7d0; }
a:hover { color: #b0cede; }
.paper-card, .talk-card, .course-card, .quote-card { background: transparent; }
.math { background: #26302f; }
footer { background: #202827; border-top-color: #3b4543; color: #aeb8b5; }
.hero-title { color: #9fc2d5; }
.hero-copy, .page-hero p:last-child, .prose, .research-item p, .timeline-item p,
.course-card p, .paper-card p, .talk-card p, .blog-post p { color: #b5bdbb; }
.small-note { color: #9fa9a6; }