/* Hao Hu — personal site. Minimal, text-first. */

:root {
  --ink: #1a1a1a;
  --muted: #777;
  --link: #1457b0;
  --rule: #e6e6e6;
  --maxw: 680px;
}

* { box-sizing: border-box; }

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

body {
  margin: 0;
  color: var(--ink);
  background: #fff;
  font-family: Georgia, "Times New Roman", "Songti SC", serif;
  font-size: 16px;
  line-height: 1.6;
}

main {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 4.5rem 1.25rem 3.5rem;
}

/* ---- header ---- */
.intro {
  display: flex;
  align-items: center;
  gap: 1.6rem;
  margin-bottom: 2.2rem;
}

.headshot {
  width: 185px;
  height: 185px;
  object-fit: cover;
  border-radius: 4px;
  flex: 0 0 auto;
  background: #f2f2f2;
}

.intro-text h1 {
  font-size: 1.7rem;
  font-weight: 700;
  margin: 0 0 .2rem;
  letter-spacing: .2px;
}

.title {
  margin: 0 0 .2rem;
  line-height: 1.4;
}

.pronounce {
  margin: 0 0 .6rem;
  color: var(--muted);
  font-size: .9rem;
  font-style: italic;
}

.links {
  margin: 0;
  font-size: .95rem;
}

/* ---- sections ---- */
section { margin: 2rem 0; }

section p:first-child { margin-top: 0; }

h2 {
  font-size: 1.3rem;
  font-weight: 700;
  margin: 0 0 .6rem;
  padding-bottom: .25rem;
  border-bottom: 1px solid var(--rule);
}

ul.papers, ul.interests {
  margin: 0;
  padding-left: 1.2rem;
}

ul.papers li, ul.interests li { margin: .35rem 0; }

.inst { margin: .9rem 0 .25rem; }

.muted { color: var(--muted); }

/* ---- links ---- */
a { color: var(--link); text-decoration: none; }
a:hover { text-decoration: underline; }

/* ---- footer ---- */
footer {
  margin-top: 3rem;
  padding-top: 1rem;
  border-top: 1px solid var(--rule);
  font-size: .85rem;
}
footer p { margin: 0; }

/* ---- mobile ---- */
@media (max-width: 540px) {
  body { font-size: 15.5px; }
  main { padding: 2.5rem 1.1rem; }
  .intro {
    flex-direction: column;
    align-items: flex-start;
    gap: 1rem;
  }
  .headshot { width: 150px; height: 150px; }
}