:root {
  --bg: #0b1220;
  --panel: #0f172a;
  --panel-soft: #111b31;
  --line: #334155;
  --text: #e2e8f0;
  --muted: #94a3b8;
  --brand: #2563eb;
  --brand-2: #1d4ed8;
  --ok: #16a34a;
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Arial, sans-serif;
  background: radial-gradient(circle at top, #111b31 0%, var(--bg) 55%);
  color: var(--text);
  min-height: 100vh;
}

a { color: inherit; text-decoration: none; }
.container { width: min(1120px, 92vw); margin: 0 auto; }

.site-header {
  position: sticky;
  top: 0;
  backdrop-filter: blur(8px);
  background: rgba(11, 18, 32, 0.78);
  border-bottom: 1px solid rgba(148, 163, 184, 0.2);
  z-index: 20;
}
.site-header-inner { display: flex; align-items: center; justify-content: space-between; gap: 12px; padding: 12px 0; }
.brand { font-weight: 700; letter-spacing: 0.2px; }
.brand small { display: block; color: var(--muted); font-weight: 500; font-size: 12px; }

.nav { display: flex; flex-wrap: wrap; gap: 8px; }
.nav a {
  border: 1px solid var(--line);
  background: rgba(15, 23, 42, 0.85);
  color: #cbd5e1;
  padding: 8px 10px;
  border-radius: 10px;
  font-size: 13px;
}
.nav a.active, .nav a:hover { border-color: #5b79b9; color: #fff; }

.main { padding: 26px 0 36px; }
.badge {
  display: inline-block;
  background: var(--brand-2);
  color: #fff;
  padding: 6px 10px;
  border-radius: 999px;
  font-size: 12px;
  margin-bottom: 12px;
}

h1 { margin: 0 0 8px; font-size: clamp(1.75rem, 3.5vw, 2.6rem); }
.lead { color: #cbd5e1; line-height: 1.6; margin-top: 0; }

.grid { display: grid; grid-template-columns: 1fr; gap: 14px; }
.grid-2 { display: grid; grid-template-columns: 1fr; gap: 14px; }
.grid-3 { display: grid; grid-template-columns: 1fr; gap: 14px; }
@media (min-width: 860px) { .grid-2 { grid-template-columns: 1fr 1fr; } }
@media (min-width: 980px) {
  .grid-home { grid-template-columns: 1fr 390px; }
  .grid-3 { grid-template-columns: repeat(3, 1fr); }
}

.card {
  background: rgba(15, 23, 42, 0.95);
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 16px;
}
.card h3 { margin: 0 0 8px; }
.card p { margin: 0; color: #cbd5e1; line-height: 1.5; }
.list { margin: 10px 0 0; padding-left: 18px; color: #cbd5e1; }
.list li { margin-bottom: 6px; }

.tile-link { display: block; }
.tile-link .card { transition: transform 0.15s ease, border-color 0.15s ease; }
.tile-link:hover .card { transform: translateY(-2px); border-color: #60a5fa; }

.kpis { display: grid; grid-template-columns: repeat(2, 1fr); gap: 10px; }
.kpi { background: var(--panel-soft); border: 1px solid var(--line); border-radius: 10px; padding: 10px; }
.kpi strong { font-size: 18px; display: block; }
.kpi span { color: var(--muted); font-size: 12px; }

.topbar { display: flex; align-items: center; justify-content: space-between; gap: 12px; margin-top: 14px; }
.hidden { display: none !important; }
.muted { color: var(--muted); }

.btn {
  border: 1px solid var(--line);
  background: #0b1220;
  color: #e2e8f0;
  padding: 8px 10px;
  border-radius: 10px;
  font-weight: 600;
  cursor: pointer;
}
.btn.primary { background: var(--brand); border-color: #3b82f6; }
.btn:hover { filter: brightness(1.08); }

.hero-panel { margin-top: 16px; }
.video-card h4 { margin: 0 0 8px; }
.video-meta { color: var(--muted); font-size: 13px; margin-bottom: 10px; }

.modal {
  position: fixed;
  inset: 0;
  background: rgba(2, 6, 23, 0.72);
  display: none;
  align-items: center;
  justify-content: center;
  padding: 20px;
  z-index: 100;
}
.modal.open { display: flex; }
.modal-panel {
  width: min(740px, 95vw);
  max-height: 86vh;
  overflow: auto;
  background: #0f172a;
  border: 1px solid #3d4d69;
  border-radius: 14px;
  padding: 16px;
}
.modal-head { display: flex; align-items: center; justify-content: space-between; gap: 10px; }
.quiz-q { margin: 14px 0; padding: 10px; border: 1px solid var(--line); border-radius: 10px; background: #111b31; }
.quiz-q p { margin: 0 0 8px; }
.quiz-q label { display: block; margin-bottom: 6px; color: #cbd5e1; }

.footer { padding: 20px 0 30px; color: var(--muted); font-size: 13px; }