/* ---------- theme ---------- */
:root[data-theme="light"] {
  --bg: #ffffff;
  --fg: #241f33;
  --muted: #6f6885;
  --accent: #6d28d9;
  --border: #e5e0f0;
  --card: #faf9fd;
}

:root[data-theme="dark"] {
  --bg: #141218;
  --fg: #e8e4f2;
  --muted: #8f87a3;
  --accent: #a78bfa;
  --border: #2b2637;
  --card: #1a1721;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font-family: Consolas, "Cascadia Code", Menlo, monospace;
  font-size: 15px;
  line-height: 1.65;
}

main {
  max-width: 720px;
  margin: 0 auto;
  padding: 3rem 1.2rem 3rem;
  position: relative;
}

section { margin-bottom: 2.8rem; }

h1 {
  margin: 0 0 0.2rem;
  font-size: 1.6rem;
  letter-spacing: 0.01em;
}

h2 {
  font-size: 1.05rem;
  color: var(--accent);
  margin: 0 0 0.9rem;
  padding-bottom: 0.35rem;
  border-bottom: 1px solid var(--border);
}

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

code {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 0.05rem 0.35rem;
  font-size: 0.9em;
}

/* ---------- left index ---------- */
#toc {
  position: fixed;
  top: 3.4rem;
  /* sit to the left of the centered 720px column */
  left: calc(50% - 360px - 170px);
  width: 150px;
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
  font-size: 0.85rem;
}
#toc a { color: var(--muted); }
#toc a:hover { color: var(--accent); text-decoration: none; }
#toc a.active {
  color: var(--accent);
  border-left: 2px solid var(--accent);
  padding-left: 0.5rem;
  margin-left: -0.6rem;
}

/* hide the index when there is no room for it */
@media (max-width: 1120px) {
  #toc { display: none; }
}

/* ---------- theme toggle ---------- */
#theme-toggle {
  position: absolute;
  top: 1.4rem;
  right: 1.2rem;
  background: none;
  border: 1px solid var(--border);
  border-radius: 6px;
  color: var(--muted);
  font: inherit;
  font-size: 0.8rem;
  padding: 0.2rem 0.7rem;
  cursor: pointer;
}
#theme-toggle:hover { color: var(--accent); border-color: var(--accent); }

/* ---------- about ---------- */
.about-grid {
  display: flex;
  gap: 1.5rem;
  align-items: center;
  flex-wrap: wrap;
}
.avatar {
  width: 120px;
  height: 120px;
  border-radius: 50%;
  object-fit: cover;
  border: 2px solid var(--accent);
}
.about-text { flex: 1; min-width: 260px; }
.role { margin: 0 0 0.7rem; color: var(--muted); }
.bio { margin: 0 0 0.8rem; }
.links a {
  margin-right: 1.1rem;
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
}
.icon { width: 1em; height: 1em; fill: currentColor; }

/* ---------- publications ---------- */
.pub-list { list-style: none; margin: 0; padding: 0; }
.pub-list li {
  padding: 0.55rem 0;
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  gap: 1rem;
}
.pub-list li:last-child { border-bottom: none; }
.pub-text { flex: 1; min-width: 0; }
.pub-image {
  width: 110px;
  max-height: 80px;
  object-fit: cover;
  border-radius: 6px;
  border: 1px solid var(--border);
  flex-shrink: 0;
}
.pub-title { color: var(--fg); }
.pub-title[href]:hover { color: var(--accent); }
.pub-detail { color: var(--muted); font-size: 0.85rem; display: block; }
.pub-year { color: var(--accent); }

/* ---------- repos ---------- */
.repo-list { display: grid; gap: 0.7rem; }
.repo-card {
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 0.75rem 1rem;
  background: var(--card);
  display: flex;
  gap: 1rem;
}
.repo-card:hover { border-color: var(--accent); }
.repo-main { flex: 1; min-width: 0; }
.repo-side {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 0.5rem;
  flex-shrink: 0;
}
.repo-icon { width: 64px; height: 64px; border-radius: 8px; object-fit: contain; }
.repo-name { font-weight: 700; }
.repo-desc { color: var(--muted); font-size: 0.85rem; margin: 0.25rem 0 0.35rem; }
.repo-update { font-size: 0.85rem; margin: 0; }
.repo-update .when { color: var(--muted); }
.stars { color: var(--muted); font-size: 0.85rem; white-space: nowrap; }

/* ---------- misc ---------- */
.muted { color: var(--muted); }
.small { font-size: 0.85rem; }

footer { border-top: 1px solid var(--border); padding-top: 1rem; }

@media (max-width: 520px) {
  main { padding: 2rem 1rem; }
  .about-grid { justify-content: center; text-align: center; }
}