.site-update-banner[hidden] {
  display: none;
}

.site-update-banner {
  box-sizing: border-box;
  position: fixed;
  z-index: 100000;
  left: 50%;
  bottom: max(14px, env(safe-area-inset-bottom));
  transform: translateX(-50%);
  width: min(680px, calc(100vw - 24px));
  max-width: calc(100% - 24px);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  padding: 12px 14px;
  border: 1px solid rgba(19, 78, 74, .2);
  border-radius: 16px;
  background: rgba(255, 255, 255, .97);
  box-shadow: 0 10px 34px rgba(15, 23, 42, .18);
  color: #172033;
  font: 500 14px/1.35 system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

.site-update-banner__text {
  min-width: 0;
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.site-update-banner__text strong {
  font-size: 14px;
}

.site-update-banner__versions {
  color: #667085;
  font-size: 12px;
}

.site-update-banner__reload {
  flex: 0 0 auto;
  min-height: 42px;
  padding: 8px 14px;
  border: 0;
  border-radius: 12px;
  background: #14532d;
  color: #fff;
  font: inherit;
  font-weight: 700;
  cursor: pointer;
}

.site-update-banner__reload:focus-visible {
  outline: 3px solid rgba(20, 83, 45, .3);
  outline-offset: 3px;
}

@media (max-width: 768px) {
  .site-update-banner {
    /* Sans VisualViewport : bandeau sous l'en-tete, toujours accessible. */
    align-items: center;
    top: max(76px, env(safe-area-inset-top));
    bottom: auto;
    width: min(440px, calc(100vw - 24px));
    padding: 10px 12px;
    max-height: calc(100dvh - 88px);
    overflow-y: auto;
    overscroll-behavior: contain;
    -webkit-overflow-scrolling: touch;
  }

  .site-update-banner.site-update-banner--visual-positioned {
    /* Le JS calcule la position dans le viewport effectivement visible. */
    top: var(--mm-update-top, 12px);
    bottom: auto;
    max-height: var(--mm-update-max-height, calc(100dvh - 24px));
  }

  .site-update-banner__reload {
    min-width: 104px;
    min-height: 44px;
    touch-action: manipulation;
  }
}

@media (max-width: 360px) {
  .site-update-banner {
    gap: 8px;
    padding: 10px;
  }

  .site-update-banner__text strong { font-size: 13px; }
  .site-update-banner__reload { min-width: 94px; padding-inline: 10px; }
}

/* Priorité intentionnelle : l’attribut hidden doit toujours masquer la bannière. */
.site-update-banner[hidden] { display: none !important; }