/* Heure Exacte — bouton discret de retour en haut, accessible. */
.he-back-to-top {
  position:fixed;
  z-index:60;
  right:max(18px, env(safe-area-inset-right, 0px) + 14px);
  bottom:max(20px, env(safe-area-inset-bottom, 0px) + 14px);
  width:44px;
  height:44px;
  display:flex;
  align-items:center;
  justify-content:center;
  padding:0;
  border:1px solid #cbd5d2;
  border-radius:50%;
  background:#ffffff;
  color:#26373e;
  box-shadow:0 3px 15px rgba(23,38,45,.11);
  font-family:system-ui, sans-serif;
  font-size:24px;
  font-weight:400;
  line-height:1;
  cursor:pointer;
  -webkit-tap-highlight-color:transparent;
  touch-action:manipulation;
}
.he-back-to-top[hidden] { display:none !important; }
.he-back-to-top:hover {
  color:#a92232;
  border-color:#9caaac;
  box-shadow:0 5px 18px rgba(23,38,45,.16);
}
.he-back-to-top:focus-visible {
  outline:2px solid #b51e2e;
  outline-offset:4px;
}
@media (max-width:720px) {
  .he-back-to-top {
    width:42px;
    height:42px;
    right:max(13px, env(safe-area-inset-right, 0px) + 12px);
    bottom:max(15px, env(safe-area-inset-bottom, 0px) + 12px);
    font-size:22px;
  }
}
@media (prefers-reduced-motion:reduce) {
  .he-back-to-top { scroll-behavior:auto; }
}