:root {
  --text: #202124;
  --muted: #6b6f76;
  --line: #e5e7eb;
  --accent: #315f8c;
  --bg: #ffffff;
  --max: 920px;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
  font-size: 17px;
  line-height: 1.7;
}

a {
  color: var(--accent);
  text-decoration: none;
}

a:hover { text-decoration: underline; }

.site {
  width: min(calc(100% - 40px), var(--max));
  margin: 0 auto;
}

header {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  padding: 32px 0 24px;
  border-bottom: 1px solid var(--line);
}

.brand {
  color: var(--text);
  font-weight: 600;
  font-size: 19px;
  letter-spacing: -0.01em;
}

nav {
  display: flex;
  gap: 24px;
  font-size: 15px;
}

nav a { color: var(--muted); }
nav a:hover, nav a.active { color: var(--text); text-decoration: none; }

main { padding: 72px 0 96px; }

.hero {
  max-width: 760px;
  padding: 24px 0 72px;
}

h1 {
  margin: 0 0 18px;
  font-size: clamp(42px, 7vw, 68px);
  line-height: 1.05;
  letter-spacing: -0.045em;
  font-weight: 650;
}

h2 {
  margin: 0 0 18px;
  font-size: 27px;
  line-height: 1.25;
  letter-spacing: -0.025em;
}

h3 {
  margin: 0 0 6px;
  font-size: 19px;
  line-height: 1.4;
}

.lede {
  margin: 0;
  max-width: 720px;
  color: #4f545b;
  font-size: 21px;
  line-height: 1.6;
}

.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 18px;
  margin-top: 28px;
}

.actions a {
  font-size: 15px;
  font-weight: 600;
}

section { margin-top: 64px; }

.section-intro {
  max-width: 700px;
  color: #555a61;
  margin-bottom: 34px;
}

.paper {
  padding: 0 0 30px;
  margin: 0 0 30px;
  border-bottom: 1px solid var(--line);
}

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

.meta {
  color: var(--muted);
  font-size: 14px;
  margin-bottom: 8px;
}

.authors {
  color: #555a61;
  font-size: 15px;
  margin-bottom: 12px;
}

.description {
  max-width: 760px;
  margin: 0 0 12px;
  color: #44484e;
}

.links {
  display: flex;
  gap: 18px;
  font-size: 14px;
  font-weight: 600;
}

.tag {
  display: inline-block;
  margin-right: 8px;
  color: var(--muted);
  font-size: 11px;
  letter-spacing: .08em;
  text-transform: uppercase;
}

.profile {
  display: grid;
  grid-template-columns: 160px 1fr;
  gap: 38px;
  align-items: start;
}

.profile img {
  width: 160px;
  height: 160px;
  object-fit: cover;
}

.prose { max-width: 720px; }

.prose p { margin: 0 0 22px; }

.cv-frame {
  width: 100%;
  height: 900px;
  border: 1px solid var(--line);
  margin-top: 28px;
}

footer {
  padding: 24px 0 48px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 14px;
}

@media (max-width: 650px) {
  .site { width: min(calc(100% - 28px), var(--max)); }

  header {
    display: block;
    padding-top: 24px;
  }

  nav {
    margin-top: 12px;
    gap: 18px;
  }

  main { padding-top: 48px; }

  .hero { padding-bottom: 48px; }

  .lede { font-size: 19px; }

  .profile {
    grid-template-columns: 1fr;
    gap: 24px;
  }

  .profile img {
    width: 130px;
    height: 130px;
  }

  .cv-frame { height: 650px; }
}