:root {
  --bg: #ffffff;
  --bg-alt: #f6f7f9;
  --text: #1a1a1a;
  --text-muted: #5a5f66;
  --border: #e2e4e8;
  --accent: #2b5fd9;
  --accent-bg: #eef2fd;
  --todo: #b45309;
  --todo-bg: #fff8ec;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #14161a;
    --bg-alt: #1c1f24;
    --text: #e8e9eb;
    --text-muted: #a1a6ad;
    --border: #2c2f35;
    --accent: #7fa4f5;
    --accent-bg: #1c2740;
    --todo: #e0a458;
    --todo-bg: #2a2115;
  }
}

* { box-sizing: border-box; }

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

.container {
  max-width: 860px;
  margin: 0 auto;
  padding-inline: 20px;
}

h1, h2 {
  line-height: 1.25;
}

h2 {
  border-bottom: 1px solid var(--border);
  padding-bottom: 0.4em;
  margin-top: 2.5em;
}

.hero {
  background: var(--bg-alt);
  padding-block: 3em 2em;
  text-align: center;
  border-bottom: 1px solid var(--border);
}

.project-name {
  font-size: 0.95rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  color: var(--accent);
  margin: 0 0 0.5em;
}

.hero h1 {
  font-size: 1.6rem;
  margin-bottom: 0.6em;
}

.authors {
  margin: 0.2em 0;
  font-size: 1.05rem;
}

.affil {
  margin: 0.1em 0 1.2em;
  color: var(--text-muted);
  font-size: 0.95rem;
}

.links {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 10px;
  margin-top: 1em;
}

.btn {
  display: inline-block;
  padding: 0.5em 1.1em;
  border-radius: 6px;
  background: var(--accent);
  color: #fff;
  text-decoration: none;
  font-size: 0.92rem;
  font-weight: 500;
}

.btn:hover { opacity: 0.88; }

.stats {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  justify-content: center;
  margin: 2.4em 0;
}

.stat {
  background: var(--accent-bg);
  border-radius: 8px;
  padding: 0.9em 1.2em;
  text-align: center;
  min-width: 140px;
  flex: 1 1 140px;
}

.stat-num {
  display: block;
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--accent);
}

.stat-label {
  display: block;
  font-size: 0.82rem;
  color: var(--text-muted);
  margin-top: 0.2em;
}

#abstract p {
  text-align: justify;
}

.todo-note {
  color: var(--todo);
  background: var(--todo-bg);
  border: 1px dashed var(--todo);
  border-radius: 6px;
  padding: 0.6em 0.9em;
  font-size: 0.9rem;
  display: inline-block;
}

.video-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 32px;
  margin-top: 1.2em;
}

.video-item {
  min-width: 0;
}

.video-item video {
  display: block;
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  background: #000;
  border-radius: 8px;
}

.video-caption {
  margin: 0.5em 0 0;
  font-size: 0.85rem;
  color: var(--text-muted);
  text-align: center;
}

ul { padding-left: 1.3em; }
li { margin-bottom: 0.5em; }

.diagram {
  width: 100%;
  overflow-x: auto;
  margin-top: 1.2em;
}

.diagram svg {
  display: block;
  width: 100%;
  height: auto;
  min-width: 700px;
}

.bibtex {
  background: var(--bg-alt);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 1em;
  overflow-x: auto;
  font-size: 0.85rem;
  white-space: pre;
}

footer {
  margin: 3em auto 2em;
  text-align: center;
  color: var(--text-muted);
  font-size: 0.85rem;
}

a { color: var(--accent); }

/* Evidence tables: readable on desktop, independently scrollable on mobile. */
h3 { margin-top: 1.8em; line-height: 1.35; }
.btn-pending { background: var(--border); color: var(--text-muted); }
.btn:focus-visible, a:focus-visible, .table-scroll:focus-visible {
  outline: 3px solid var(--accent); outline-offset: 3px;
}
.table-scroll { overflow-x: auto; margin: 1.2em 0; border: 1px solid var(--border); border-radius: 8px; }
table { width: 100%; border-collapse: collapse; font-size: 0.9rem; }
caption { text-align: left; padding: 0.9em; font-weight: 600; background: var(--bg-alt); }
th, td { text-align: left; vertical-align: top; padding: 0.75em; border-bottom: 1px solid var(--border); }
thead th { background: var(--accent-bg); }
tbody th { font-weight: 600; }
tbody tr:last-child > * { border-bottom: none; }
.evidence-note { color: var(--text-muted); font-size: 0.9rem; }
.clip-id { white-space: nowrap; }
@media (max-width: 600px) {
  .hero { padding-block: 2em 1.5em; }
  .hero h1 { font-size: 1.35rem; }
  table { min-width: 620px; }
  #abstract p { text-align: left; }
}