/* Navigation globale : numéro discret et plan de la présentation (voir nav.js). Fond blanc, thème Océan. */
#nav {
  --nav-ink: #082f49;
  --nav-primary: #0369a1;
  --nav-line: #bae6fd;
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}
#nav .nav-counter-wrap {
  position: fixed;
  left: 14px;
  bottom: 10px;
  z-index: 40;
  display: flex;
  align-items: center;
}
#nav .nav-counter-wrap.nav-hide {
  display: none;
}
#nav .nav-counter {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 2px 6px;
  border: 0;
  border-radius: 6px;
  background: none;
  color: var(--nav-ink);
  font: 500 12px/1 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.02em;
  opacity: 0.28;
  cursor: pointer;
  transition: opacity 0.2s;
}
#nav .nav-counter::before {
  content: "";
  width: 9px;
  height: 9px;
  background: radial-gradient(circle, currentColor 1.1px, transparent 1.3px) 0 0 / 3.4px 3.4px;
  opacity: 0.8;
}
#nav .nav-counter:hover,
#nav .nav-counter:focus-visible {
  opacity: 0.9;
}
#nav .nav-counter:focus-visible,
#nav .nav-card:focus-visible,
#nav .nav-close:focus-visible {
  outline: 3px solid #0891b2;
  outline-offset: 2px;
}

/* Plan */
#nav .nav-grid {
  position: fixed;
  inset: 0;
  z-index: 60;
  display: flex;
  flex-direction: column;
  padding: 3vh 4vw 4vh;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(8px);
  overflow-y: auto;
}
#nav .nav-grid[hidden] {
  display: none;
}
#nav .nav-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 2.4vh;
}
#nav .nav-title {
  font-size: clamp(18px, 2.2vw, 30px);
  font-weight: 800;
  letter-spacing: -0.02em;
  color: var(--nav-ink);
}
#nav .nav-close {
  width: 38px;
  height: 38px;
  border: 1px solid var(--nav-line);
  border-radius: 50%;
  background: #fff;
  color: var(--nav-ink);
  font-size: 20px;
  line-height: 1;
  cursor: pointer;
}
#nav .nav-cards {
  list-style: none;
  display: grid;
  /* 5 colonnes sur grand écran ; jamais plus étroites que 160 px (téléphone : 2 colonnes, le plan défile). */
  grid-template-columns: repeat(auto-fill, minmax(max(17vw, 160px), 1fr));
  gap: 2vh 1.6vw;
}
#nav .nav-card {
  position: relative;
  display: block;
  width: 100%;
  padding: 0;
  border: 2px solid var(--nav-line);
  border-radius: 14px;
  background: #fff;
  overflow: hidden;
  text-align: left;
  cursor: pointer;
  box-shadow: 0 1px 2px rgba(22, 78, 99, 0.1), 0 8px 18px -8px rgba(22, 78, 99, 0.2);
  transition: transform 0.15s, border-color 0.15s;
}
#nav .nav-card img {
  display: block;
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  background: #f0f9ff;
}
#nav .nav-card.sel {
  transform: translateY(-3px);
  border-color: var(--nav-primary);
}
#nav .nav-card.on {
  border-color: var(--nav-primary);
  box-shadow: 0 0 0 3px rgba(3, 105, 161, 0.18), 0 8px 18px -8px rgba(22, 78, 99, 0.2);
}
#nav .nav-num {
  position: absolute;
  top: 8px;
  left: 8px;
  min-width: 26px;
  padding: 3px 8px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.92);
  color: var(--nav-primary);
  font: 700 13px/1.2 system-ui, sans-serif;
  text-align: center;
}
#nav .nav-card.on .nav-num {
  background: var(--nav-primary);
  color: #fff;
}
#nav .nav-label {
  display: block;
  padding: 9px 12px 11px;
  color: var(--nav-ink);
  font-size: 14px;
  font-weight: 600;
  line-height: 1.25;
}
@media (prefers-reduced-motion: reduce) {
  #nav .nav-card,
  #nav .nav-counter {
    transition: none;
  }
}