:root {
  --bg: #ffffff;
  --text: #1f2328;
  --muted: #5b636e;
  --accent: #1d5c96;
  --rule: #e3e6ea;
  --abstract-bg: #f5f7f9;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #15181c;
    --text: #e4e7eb;
    --muted: #9aa3ad;
    --accent: #7db4e6;
    --rule: #2c3238;
    --abstract-bg: #1d2126;
  }
}

* { box-sizing: border-box; }

html { font-size: 13px; -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  font-size: 1rem;
  line-height: 1.6;
}

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

.wrap {
  max-width: 720px;
  margin: 0 auto;
  padding: 64px 24px;
}

header h1 {
  font-size: 2rem;
  line-height: 1.2;
  margin: 0 0 24px;
}

.links { margin: 0; }

/* Main content */
.intro p:first-of-type { margin-top: 0; }

.intro::after { content: ""; display: block; clear: both; }

.photo {
  float: right;
  width: 150px;
  height: auto;
  margin: 4px 0 12px 24px;
}

h2 {
  font-size: 0.85rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--muted);
  border-bottom: 1px solid var(--rule);
  padding-bottom: 6px;
  margin: 48px 0 20px;
}

.paper { margin: 0 0 24px; }

.paper h3 {
  font-size: 1.05rem;
  line-height: 1.4;
  margin: 0;
}

.paper h3 a { color: var(--text); }
.paper h3 a:hover { color: var(--accent); }

.paper .meta {
  color: var(--muted);
  font-size: 0.95rem;
  margin: 2px 0 0;
}

.paper .note {
  font-size: 0.95rem;
  margin: 2px 0 0;
}

details { margin-top: 6px; }

summary {
  cursor: pointer;
  color: var(--accent);
  font-size: 0.9rem;
  width: fit-content;
}

details p {
  background: var(--abstract-bg);
  border-left: 3px solid var(--accent);
  padding: 12px 16px;
  margin: 8px 0 0;
  font-size: 0.95rem;
}

/* Mobile */
@media (max-width: 600px) {
  .wrap { padding: 32px 16px; }
  header h1 { font-size: 1.7rem; }
  .photo { width: 110px; margin-left: 16px; }
  h2 { margin-top: 36px; }
}