/* style.css — modern layout for Lei Zhang's academic homepage */

:root {
  --accent: #3873b2;         /* matches the moderncv "blue" (rgb 0.22,0.45,0.70) */
  --accent-dark: #2b5a8c;
  --text: #222;
  --muted: #666;
  --rule: #e2e2e2;
  --maxw: 960px;
}

* { box-sizing: border-box; }

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

body {
  margin: 0 auto;
  max-width: var(--maxw);
  padding: 1.5rem 1.25rem 3rem;
  font-family: "Helvetica Neue", Helvetica, Arial, "PingFang SC",
               "Microsoft YaHei", sans-serif;
  font-size: 16px;
  line-height: 1.6;
  color: var(--text);
  background: #fff;
}

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

/* ---- navigation tabs ---- */
.site-nav {
  margin: 0 0 1.5rem;
  border-bottom: 2px solid var(--accent);
}
.site-nav ul {
  margin: 0;
  padding: 0;
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 0.25rem;
}
.site-nav a {
  display: block;
  padding: 0.5rem 1.1rem;
  color: var(--text);
  font-weight: 600;
  border: 1px solid var(--rule);
  border-bottom: none;
  border-radius: 5px 5px 0 0;
  background: #f7f7f7;
}
.site-nav a:hover { background: #ececec; text-decoration: none; }
.site-nav a.active {
  background: var(--accent);
  color: #fff;
  border-color: var(--accent);
}

/* ---- headings ---- */
h1 { font-size: 1.7rem; margin: 0 0 0.2rem; }
h2 {
  font-size: 1.25rem;
  color: var(--accent);
  margin: 2rem 0 0.75rem;
  padding-bottom: 0.3rem;
  border-bottom: 1px solid var(--rule);
}
h3 { font-size: 1.05rem; margin: 1.25rem 0 0.4rem; }

/* ---- home header ---- */
.profile {
  display: flex;
  flex-wrap: wrap;
  gap: 1.5rem;
  align-items: flex-start;
}
.profile .intro { flex: 1 1 340px; }
.profile .photo { flex: 0 0 160px; }
.profile .photo img {
  width: 160px;
  height: auto;
  border: 1px solid var(--rule);
  border-radius: 4px;
}
.affil { color: var(--muted); margin: 0.25rem 0; }

.cols {
  display: flex;
  flex-wrap: wrap;
  gap: 1.5rem;
}
.cols > div { flex: 1 1 280px; }

.banners {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  align-items: center;
  margin: 1.5rem 0 0;
}
.banners img { height: 46px; width: auto; border: 1px solid var(--rule); }

/* ---- publication list ---- */
.pub-list { list-style: none; margin: 0; padding: 0; }
.pub-list > li {
  position: relative;
  margin: 0 0 0.9rem;
  padding-left: 2.8rem;
}
.pub-list > li .num {
  position: absolute;
  left: 0;
  color: var(--muted);
  font-variant-numeric: tabular-nums;
}
.pub-list .title { font-weight: 600; }
.pub-list .authors { font-style: italic; }
.pub-list .venue { color: var(--muted); }

/* plain lists used for students / grants / organizations */
.plain { list-style: none; margin: 0; padding: 0; }
.plain > li { margin: 0 0 0.5rem; }

hr { border: none; border-top: 1px solid var(--rule); margin: 2rem 0; }

.research-banner {
  display: block;
  max-width: 100%;
  height: auto;
  border: 1px solid var(--rule);
  margin: 0.5rem 0 1rem;
}

footer {
  margin-top: 2.5rem;
  padding-top: 1rem;
  border-top: 1px solid var(--rule);
  color: var(--muted);
  font-size: 0.9rem;
}

@media (max-width: 600px) {
  body { font-size: 15px; }
  .pub-list > li { padding-left: 2.4rem; }
}