/* Navigation latérale fixe des pages de statistiques (stats.html, stats-dynamiques.html) ;
   barre repliable en haut sur écran étroit. */
:root { --stats-nav-width: 16rem; }
.stats-nav {
  position: fixed; top: 0; left: 0; bottom: 0; z-index: 100;
  width: var(--stats-nav-width); overflow-y: auto;
  background: #f5f7fa; border-right: 1px solid #dde3ea;
  padding: 1rem 0.75rem 2rem;
  font-family: Calibri, Roboto, Arial, sans-serif;
}
.stats-nav-toggle { display: none; }
.stats-nav h2 { font-size: 0.8rem; text-transform: uppercase; letter-spacing: 0.05em; color: #667; margin: 1rem 0.5rem 0.4rem; }
.stats-nav ul { list-style: none; margin: 0; padding: 0; }
.stats-nav a {
  display: block; padding: 0.4rem 0.6rem; border-radius: 5px;
  color: #234; text-decoration: none; font-size: 0.9rem; line-height: 1.3;
}
.stats-nav a:hover { background: #e3eaf2; }
.stats-nav a.active, .stats-nav a[aria-current="page"] { background: #dbe8fb; font-weight: bold; box-shadow: inset 3px 0 0 #2196F3; }
#statsPage body { margin-left: var(--stats-nav-width); }
#statsPage main { padding: 1rem 1.5rem 3rem; }
#statsPage [id] { scroll-margin-top: 1rem; }
@media (max-width: 900px) {
  .stats-nav { bottom: auto; right: 0; width: auto; max-height: 100vh; padding: 0.4rem 1rem; border-right: 0; border-bottom: 1px solid #dde3ea; }
  .stats-nav-toggle {
    display: inline-flex; align-items: center; gap: 0.5rem;
    padding: 0.4rem 0.8rem; border: 1px solid #c5ced8; border-radius: 6px; background: #fff; font-size: 1rem; cursor: pointer;
  }
  .stats-nav-links { display: none; }
  .stats-nav.open .stats-nav-links { display: block; }
  #statsPage body { margin-left: 0; padding-top: 3rem; }
  #statsPage [id] { scroll-margin-top: 3.5rem; }
}