/* Siyuan Ma — academic homepage
   Minimal Jon-Barron-style: serif body, narrow column, no JS. */

:root {
  --text: #222;
  --muted: #666;
  --accent: #b00;
  --bg: #fff;
  --link: #0050b3;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--text);
  font-family: "Charter", "Bitstream Charter", "Sitka Text", Cambria, serif;
  font-size: 17px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}

main {
  max-width: 780px;
  margin: 0 auto;
  padding: 40px 24px 60px;
}

header {
  border-bottom: 1px solid #eee;
  padding-bottom: 20px;
  margin-bottom: 28px;
  display: flex;
  align-items: flex-start;
  gap: 24px;
}

.header-text {
  flex: 1;
  min-width: 0;
}

.avatar {
  width: 150px;
  height: auto;
  border-radius: 6px;
  flex-shrink: 0;
}

@media (max-width: 560px) {
  header { flex-direction: column; gap: 16px; }
  .avatar { width: 120px; }
}

h1 {
  font-size: 36px;
  margin: 0 0 6px;
  font-weight: 700;
  letter-spacing: -0.01em;
}

.affil {
  font-size: 16px;
  color: var(--muted);
  margin: 0 0 8px;
}

.links {
  font-size: 15px;
  color: var(--muted);
  margin: 0;
}

.links a {
  color: var(--link);
}

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

a:hover {
  text-decoration: underline;
}

section {
  margin-top: 32px;
}

section p {
  margin: 0 0 14px;
}

h2 {
  font-size: 22px;
  font-weight: 700;
  margin: 0 0 14px;
  padding-bottom: 4px;
  border-bottom: 1px solid #f0f0f0;
}

h3 {
  font-size: 16px;
  color: var(--muted);
  margin: 20px 0 8px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

ul {
  padding-left: 22px;
  margin: 0 0 14px;
}

ul.news {
  list-style: none;
  padding-left: 0;
}

ul.news li {
  margin: 6px 0;
  padding-left: 80px;
  position: relative;
  font-size: 16px;
}

ul.news .date {
  position: absolute;
  left: 0;
  width: 70px;
  color: var(--muted);
  font-size: 14px;
  font-variant-numeric: tabular-nums;
}

ul.pubs {
  list-style: none;
  padding-left: 0;
}

ul.pubs li {
  margin: 0 0 14px;
  padding: 0;
  font-size: 16px;
}

ul.pubs .title {
  font-weight: 600;
  color: var(--text);
}

ul.pubs em {
  color: var(--muted);
  font-style: italic;
}

ul.service {
  list-style: none;
  padding-left: 0;
}

ul.service li {
  margin: 0 0 8px;
  font-size: 16px;
}

.note {
  font-size: 14px;
  color: var(--muted);
  font-style: italic;
}

.hl {
  margin-top: 6px;
  padding: 8px 12px;
  border-left: 3px solid var(--accent);
  background: #fafafa;
  font-size: 15px;
  line-height: 1.5;
}

.hl strong { color: var(--accent); }

ul.news li.pinned {
  background: #eaf3fb;
  border-radius: 4px;
  padding-top: 8px;
  padding-bottom: 8px;
  margin: 4px 0 12px;
}

footer {
  margin-top: 50px;
  padding-top: 16px;
  border-top: 1px solid #eee;
  font-size: 13px;
  color: var(--muted);
  text-align: center;
}

strong { font-weight: 700; }

@media (max-width: 600px) {
  main { padding: 24px 16px 40px; }
  h1 { font-size: 28px; }
  ul.news li { padding-left: 0; }
  ul.news .date { position: static; display: block; width: auto; margin-bottom: 2px; }
}