:root {
  --bg: #ffffff;
  --text: #0a0a0a;
  --muted: #6b7280;
  --border: #e5e7eb;
  --accent: #0f172a;
  --accent-2: #111827;
  --radius: 12px;
  --shadow: 0 4px 20px rgba(0,0,0,0.08);
  --focus: 2px solid #111827;
}
* { box-sizing: border-box; }
html, body { height: 100%; }
body {
  margin: 0; background: var(--bg); color: var(--text);
  font-family: "Noto Sans", system-ui, -apple-system, Segoe UI, Roboto, Arial, sans-serif;
  line-height: 1.6;
}
.container { width: min(1100px, 92%); margin: 0 auto; }
.skip-link {
  position: absolute; left: -9999px; top: auto;
}
.skip-link:focus { left: 1rem; top: 1rem; background: #fff; padding: .5rem .75rem; border: 1px solid var(--border); border-radius: 6px; }

.site-header {
  position: sticky; top: 0; z-index: 50; background: rgba(255,255,255,0.9); backdrop-filter: saturate(180%) blur(12px);
  border-bottom: 1px solid var(--border);
}
.header-inner { display: flex; align-items: center; justify-content: space-between; padding: .8rem 0; gap: 1rem; }
.brand { display: inline-flex; align-items: center; gap: .6rem; text-decoration: none; color: inherit; font-weight: 700; letter-spacing: .2px; }
.brand-mark {
  width: 34px; height: 34px; display: grid; place-items: center; border: 1px solid var(--border);
  border-radius: 8px; font-weight: 700;
}
.nav-toggle { display: none; background: transparent; border: 1px solid var(--border); padding: .45rem .6rem; border-radius: 8px; }
.site-nav ul { list-style: none; display: flex; gap: 1rem; margin: 0; padding: 0; }
.site-nav a { color: inherit; text-decoration: none; padding: .4rem .6rem; border-radius: 8px; }
.site-nav a:hover { background: #f7f7f7; }
.site-nav a:focus { outline: var(--focus); outline-offset: 2px; }

.main { padding: 1.2rem 0 2rem; min-height: 70vh; }
.hero {
  display: grid; grid-template-columns: 1.2fr .8fr; gap: 1.2rem; align-items: center; margin: 1rem 0 1.5rem;
}
.card {
  background: #fff; border: 1px solid var(--border); border-radius: var(--radius); box-shadow: var(--shadow);
  padding: 1rem; transition: transform .2s ease, box-shadow .2s ease;
}
.card:hover { transform: translateY(-2px); box-shadow: 0 12px 30px rgba(0,0,0,.10); }
.grid { display: grid; gap: 1rem; }
.grid.cols-3 { grid-template-columns: repeat(3, 1fr); }
.grid.cols-2 { grid-template-columns: repeat(2, 1fr); }

.section-title { font-size: 1.2rem; margin: .25rem 0 .5rem; }
.muted { color: var(--muted); font-size: .95rem; }

.timeline-controls { display: flex; flex-wrap: wrap; gap: .6rem; align-items: center; margin-bottom: .8rem; }
.timeline {
  display: grid; gap: .6rem; grid-auto-rows: min-content;
}
.timeline-item {
  border-left: 3px solid var(--accent); padding: .6rem .8rem .6rem 1rem; background: #fff; border-radius: 8px; border: 1px solid var(--border); position: relative;
}
.timeline-item::before {
  content: ""; position: absolute; left: -7px; top: 14px; width: 10px; height: 10px; background: var(--accent); border-radius: 50%;
}
.badge { display: inline-block; font-size: .8rem; color: #fff; background: var(--accent-2); padding: .15rem .5rem; border-radius: 999px; }

.accordion dt { margin: 0; }
.accordion dd { margin: 0 0 .5rem; color: var(--muted); }
.accordion details { border: 1px solid var(--border); border-radius: 10px; padding: .6rem .8rem; background: #fff; }
.accordion summary { cursor: pointer; font-weight: 700; }

.map-wrap { height: 420px; border: 1px solid var(--border); border-radius: var(--radius); overflow: hidden; }
.leaflet-container { font: inherit; }

.quiz-q { margin-bottom: .6rem; font-weight: 700; }
.quiz-choices { display: grid; gap: .5rem; }
.quiz-choices button {
  text-align: left; border: 1px solid var(--border); padding: .6rem .7rem; border-radius: 10px; background: #fff; cursor: pointer;
}
.quiz-choices button.correct { border-color: #16a34a; background: #f0fdf4; }
.quiz-choices button.wrong { border-color: #dc2626; background: #fef2f2; }
.quiz-footer { display: flex; justify-content: space-between; align-items: center; margin-top: .6rem; }

.search { display: flex; gap: .4rem; }
.search input { flex: 1; padding: .55rem .6rem; border: 1px solid var(--border); border-radius: 10px; }
.search button { padding: .55rem .9rem; border: 1px solid var(--border); background: #111; color: #fff; border-radius: 10px; }

.site-footer { border-top: 1px solid var(--border); padding: 1rem 0 2rem; }
.footer-inner { display: grid; gap: .8rem; }

@media (max-width: 900px) {
  .hero { grid-template-columns: 1fr; }
  .grid.cols-3 { grid-template-columns: 1fr; }
  .grid.cols-2 { grid-template-columns: 1fr; }
  .nav-toggle { display: inline-block; }
  .site-nav { position: absolute; top: 58px; right: 4%; background: #fff; border: 1px solid var(--border); border-radius: 10px; padding: .4rem; display: none; }
  .site-nav.open { display: block; }
  .site-nav ul { flex-direction: column; }
}

@media (prefers-reduced-motion: reduce) {
  * { animation: none !important; transition: none !important; scroll-behavior: auto !important; }
}