*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

:root {
  --bg: #f5f0eb;
  --text: #1a1a1a;
  --accent: #c4622c;
  --muted: #999;
  --rule: #d8d0c8;
  --bio-text: #3a3530;
  --abstract-text: #6b6460;
}

html, body {
  background: var(--bg);
  color: var(--text);
  font-family: 'Helvetica Neue', Helvetica, Arial, sans-serif;
  font-size: 15px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

body {
  padding: 80px 60px;
}

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

a:hover {
  text-decoration: underline;
}

/* ── Two-column layout ── */

.page {
  display: grid;
  grid-template-columns: 260px 1fr;
  gap: 72px;
  max-width: 940px;
  margin: 0 auto;
}

/* ── Bio column ── */

.bio-col {
  position: sticky;
  top: 80px;
  align-self: start;
}

.photo {
  width: 100%;
  display: block;
  margin-bottom: 18px;
  image-rendering: high-quality;
}

h1 {
  font-size: 1.1rem;
  font-weight: 600;
  letter-spacing: 0.015em;
  margin-bottom: 10px;
}

.bio {
  font-size: 0.87rem;
  color: var(--bio-text);
  line-height: 1.7;
  margin-bottom: 18px;
}

.icon-links {
  display: flex;
  gap: 14px;
  font-size: 1.15rem;
}

.icon-links a {
  color: var(--text);
  text-decoration: none;
  transition: color 0.15s;
}

.icon-links a:hover {
  color: var(--accent);
  text-decoration: none;
}

.cv-link {
  display: inline-block;
  margin-top: 12px;
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--accent);
  text-decoration: none;
  border-bottom: 1px solid var(--accent);
  padding-bottom: 1px;
}

.cv-link:hover {
  text-decoration: none;
  opacity: 0.75;
}

/* ── Research column ── */

.research-col {
  padding-top: 2px;
}

section {
  margin-bottom: 44px;
}

h2 {
  font-size: 0.65rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--muted);
  padding-bottom: 8px;
  border-bottom: 1px solid var(--rule);
  margin-bottom: 20px;
}

.paper {
  margin-bottom: 22px;
}

.paper-title {
  font-size: 0.9rem;
  line-height: 1.45;
  margin-bottom: 3px;
}

.paper-title a {
  color: var(--text);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color 0.15s, border-color 0.15s;
}

.paper-title a:hover {
  color: var(--accent);
  border-bottom-color: var(--accent);
  text-decoration: none;
}

.paper-meta {
  font-size: 0.78rem;
  color: var(--muted);
}

.jmp-label {
  font-size: 0.62rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--accent);
  margin-left: 6px;
  white-space: nowrap;
}

.abstract {
  font-size: 0.8rem;
  color: var(--abstract-text);
  line-height: 1.7;
  margin-top: 8px;
}

/* ── Mobile ── */

@media (max-width: 680px) {
  body {
    padding: 40px 24px;
  }

  .page {
    grid-template-columns: 1fr;
    gap: 44px;
  }

  .bio-col {
    position: static;
  }

  .photo {
    width: 160px;
  }
}