:root {
  --bg: #ffffff;
  --text: #111213;
  --muted: #6b7280;
  --accent: #2563eb;
  --card: #f6f7f9;
  --border: #e5e7eb;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0b0c0e;
    --text: #e6e7ea;
    --muted: #a1a1aa;
    --accent: #60a5fa;
    --card: #121318;
    --border: #23252b;
  }
}

* { box-sizing: border-box; }
html, body { height: 100%; }
body {
  margin: 0;
  color: var(--text);
  background: var(--bg);
  font: 16px/1.6 system-ui, -apple-system, Segoe UI, Roboto, Inter, Arial, sans-serif;
}

.container {
  max-width: 900px;
  margin: 0 auto;
  padding: 0 20px;
}

.skip-link {
  position: absolute; left: -9999px; top: auto; width: 1px; height: 1px; overflow: hidden;
}
.skip-link:focus { position: static; width: auto; height: auto; padding: 8px; background: var(--card); }

.site-header {
  position: sticky; top: 0; z-index: 10;
  backdrop-filter: saturate(150%) blur(6px);
  background: color-mix(in lab, var(--bg) 85%, transparent);
  border-bottom: 1px solid var(--border);
}
.site-header .container { display: flex; align-items: center; justify-content: space-between; padding: 12px 20px; }

.brand { display: inline-flex; align-items: center; gap: 10px; text-decoration: none; color: inherit; font-weight: 700; }
.brand__dot { width: 10px; height: 10px; border-radius: 50%; background: var(--accent); display: inline-block; }
.brand__text { letter-spacing: 0.3px; }

.nav { display: flex; gap: 16px; align-items: center; }
.nav__link { color: inherit; text-decoration: none; padding: 6px 8px; border-radius: 6px; }
.nav__link:hover, .nav__link:focus { background: var(--card); }

.theme-toggle {
  font: inherit; border: 1px solid var(--border); background: var(--card);
  color: inherit; border-radius: 8px; padding: 4px 8px; cursor: pointer;
}

.hero { padding: 64px 0; }
.grid {
  display: grid; gap: 32px;
  grid-template-columns: 1.2fr 0.8fr;
}
@media (max-width: 820px) { .grid { grid-template-columns: 1fr; } }

.title { font-size: clamp(28px, 4vw, 42px); margin: 0 0 8px; }
.subtitle { color: var(--muted); margin: 0 0 16px; }

.links { display: flex; gap: 12px; margin: 24px 0; }
.button {
  display: inline-block; background: var(--accent); color: white;
  padding: 10px 14px; border-radius: 10px; text-decoration: none; font-weight: 600;
}
.button--ghost {
  background: transparent; color: var(--accent); border: 1px solid var(--accent);
}

.hero__figure { display: flex; align-items: center; justify-content: center; }
.hero__figure img {
  width: min(280px, 80%); aspect-ratio: 1/1; object-fit: cover; border-radius: 16px; border: 1px solid var(--border);
  background: var(--card);
}

.social { list-style: none; display: flex; gap: 16px; padding: 0; margin: 16px 0 0; }
.icon-link { display: inline-flex; gap: 6px; align-items: center; color: inherit; text-decoration: none; }
.icon-link:hover { color: var(--accent); }

.section { padding: 48px 0; border-top: 1px solid var(--border); }
.cards { list-style: none; padding: 0; margin: 24px 0 0; display: grid; gap: 16px; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); }
.card {
  background: var(--card); border: 1px solid var(--border); border-radius: 12px; padding: 16px;
}

.pubs { padding: 0; margin: 24px 0 0; display: grid; gap: 16px; }
.pubs > li { list-style: decimal inside; background: var(--card); border: 1px solid var(--border); border-radius: 12px; padding: 12px 14px; }
.pubs__title { display: block; font-weight: 600; }
.pubs__authors, .pubs__venue { display: block; color: var(--muted); font-size: 0.95rem; }
.pubs__link { margin-right: 10px; }

.site-footer { border-top: 1px solid var(--border); padding: 24px 0; color: var(--muted); }