:root {
  --bg: #eff2f7;
  --card: #ffffff;
  --ink: #1f2937;
  --muted: #55617a;
  --accent: #4a6fa5;
  --accent-dark: #2c4a75;
  --rule: #d7dde8;
  --serif: Georgia, "Times New Roman", serif;
  --sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

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

body {
  background: var(--bg);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 17px;
  line-height: 1.65;
}

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

/* ---- Navigation ---- */
header {
  background: var(--bg);
  border-bottom: 1px solid var(--rule);
  padding: 0 24px;
}
.nav-inner {
  max-width: 1100px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 56px;
}
.brand {
  font-family: var(--serif);
  font-weight: bold;
  font-size: 1.15rem;
  color: var(--ink);
}
.brand:hover { text-decoration: none; color: var(--ink); }
nav a {
  margin-left: 28px;
  color: var(--muted);
  font-size: 0.95rem;
}
nav a.active { color: var(--accent); }
nav a:hover { text-decoration: none; color: var(--accent-dark); }

/* ---- Layout ---- */
main {
  max-width: 1100px;
  margin: 0 auto;
  padding: 48px 24px 80px;
}

/* ---- Home hero ---- */
.hero {
  display: flex;
  gap: 56px;
  align-items: flex-start;
  flex-wrap: wrap;
}
.hero img {
  width: 385px;
  max-width: 100%;
  height: auto;
  display: block;
}
.hero-text { flex: 1; min-width: 300px; }
.hero-text h1 {
  font-family: var(--serif);
  font-size: 2.6rem;
  font-weight: bold;
  margin-bottom: 8px;
}
.hero-text .role {
  color: var(--accent);
  font-size: 1.02rem;
  margin-bottom: 26px;
}
.hero-text .lede {
  font-size: 1.25rem;
  margin-bottom: 26px;
}
.hero-text p { margin-bottom: 18px; color: var(--muted); }
.hero-text p strong { color: var(--ink); }

hr.section-rule {
  border: none;
  border-top: 1px solid var(--rule);
  margin: 56px 0 48px;
}

/* ---- Sections ---- */
h2 {
  font-family: var(--serif);
  font-size: 1.55rem;
  margin-bottom: 28px;
}
h3.paper-title {
  font-size: 1.15rem;
  font-weight: 700;
  line-height: 1.45;
  margin-bottom: 4px;
}
.paper { margin-bottom: 36px; }
.paper .authors { color: var(--muted); }
.paper .status { color: var(--accent); font-size: 0.92rem; }
.paper .venue { color: var(--muted); font-size: 0.95rem; font-style: italic; }
details.abstract { margin-top: 6px; }
details.abstract summary {
  color: var(--accent);
  cursor: pointer;
  font-size: 0.95rem;
  list-style: none;
}
details.abstract summary::-webkit-details-marker { display: none; }
details.abstract p {
  margin-top: 10px;
  padding: 14px 18px;
  background: var(--card);
  border-left: 3px solid var(--accent);
  color: var(--muted);
  font-size: 0.97rem;
}

/* ---- CV page ---- */
.cv-section { margin-bottom: 44px; }
.cv-entry { margin-bottom: 18px; }
.cv-entry .line1 {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  font-weight: 600;
}
.cv-entry .line1 .dates { color: var(--muted); font-weight: normal; white-space: nowrap; }
.cv-entry .sub { color: var(--muted); }
.cv-list { list-style: none; }
.cv-list li { margin-bottom: 12px; }
.download-btn {
  display: inline-block;
  background: var(--accent);
  color: #fff;
  padding: 10px 22px;
  border-radius: 4px;
  font-size: 0.95rem;
  margin-bottom: 40px;
}
.download-btn:hover { background: var(--accent-dark); color: #fff; text-decoration: none; }

/* ---- Contact ---- */
.contact-list { list-style: none; margin-bottom: 22px; }
.contact-list li { margin-bottom: 8px; color: var(--muted); }
.contact-list li strong { color: var(--ink); }
.contact-links {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 12px 28px;
}
.contact-links li a { font-size: 1rem; }

/* ---- Footer ---- */
footer {
  border-top: 1px solid var(--rule);
  padding: 28px 24px 48px;
  text-align: center;
  color: var(--muted);
  font-size: 0.9rem;
}

@media (max-width: 760px) {
  .nav-inner { flex-direction: column; height: auto; padding: 12px 0; gap: 8px; }
  nav a { margin: 0 12px; }
  .hero { gap: 32px; }
  .hero-text h1 { font-size: 2.1rem; }
}