:root {
  --text: #1f2328;
  --muted: #5b6270;
  --accent: #0a6ad8;
  --rule: #e3e5e8;
  --bg: #ffffff;
  --serif: "Source Serif 4", Georgia, "Times New Roman", serif;
  --sans: "Inter", -apple-system, "Segoe UI", Helvetica, Arial, sans-serif;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--serif);
  font-size: 18px;
  line-height: 1.6;
}

.page {
  max-width: 820px;
  margin: 0 auto;
  padding: 56px 24px 40px;
}

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

/* Intro */
.intro {
  display: flex;
  gap: 40px;
  align-items: flex-start;
  padding-bottom: 32px;
  border-bottom: 1px solid var(--rule);
}
.side {
  width: 210px;
  flex-shrink: 0;
}
.photo {
  width: 100%;
  height: auto;
  border-radius: 6px;
}
.contact {
  list-style: none;
  padding: 0;
  margin: 12px 0 0;
  font-size: 0.9rem;
  line-height: 1.9;
}
.contact li { display: flex; align-items: center; gap: 8px; }
.contact svg { width: 15px; height: 15px; color: var(--muted); flex-shrink: 0; }
h1 {
  font-size: 2.1rem;
  font-weight: 600;
  line-height: 1.2;
  margin: 0 0 6px;
}
.fields span { font-weight: 600; }

/* Sections */
section {
  padding: 28px 0 8px;
  border-bottom: 1px solid var(--rule);
}
h2 {
  font-family: var(--sans);
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--muted);
  margin: 0 0 16px;
}
.paper { margin-bottom: 22px; }
h3 {
  font-size: 1.12rem;
  font-weight: 600;
  line-height: 1.4;
  margin: 0 0 4px;
}
h3 a { color: var(--text); border-bottom: 1px solid var(--accent); }
h3 a:hover { color: var(--accent); text-decoration: none; }
.meta {
  margin: 0;
  color: var(--muted);
  font-size: 0.98rem;
}

/* Collapsible abstracts */
details { margin-top: 6px; }
summary {
  cursor: pointer;
  font-family: var(--sans);
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--accent);
  list-style: none;
  display: inline-block;
}
summary::-webkit-details-marker { display: none; }
summary::before { content: "+ "; }
details[open] summary::before { content: "− "; }
details p {
  margin: 8px 0 0;
  padding-left: 14px;
  border-left: 2px solid var(--rule);
  font-size: 0.97rem;
}

ul.plain { padding-left: 20px; margin-top: 6px; }


@media (max-width: 640px) {
  .page { padding: 32px 16px; }
  .intro { flex-direction: column; gap: 20px; }
  .side { width: 100%; }
  .photo { width: 160px; }
}