/* === Sync Error Banner (Pilier 4) === */
.sync-banner {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 99999;
  padding: 10px 20px;
  font-family: var(--sk-font-mono);
  font-size: 13px;
  display: flex;
  align-items: center;
  justify-content: center;
  animation: sk-slide-down 0.3s ease-out;
}

.sync-banner--warning {
  background: linear-gradient(135deg, rgba(255, 152, 0, 0.95), rgba(255, 87, 34, 0.95));
  color: #fff;
}

.sync-banner--critical {
  background: linear-gradient(135deg, rgba(211, 47, 47, 0.95), rgba(183, 28, 28, 0.95));
  color: #fff;
  box-shadow: 0 4px 20px rgba(211, 47, 47, 0.5);
}

.sync-banner--closing {
  animation: sk-slide-up 0.3s ease-in forwards;
}

.sync-banner__content {
  display: flex;
  align-items: center;
  gap: 12px;
  max-width: 800px;
}

.sync-banner__icon { flex-shrink: 0; }

.sync-banner__retry {
  background: rgba(255, 255, 255, 0.2);
  border: 1px solid rgba(255, 255, 255, 0.4);
  color: #fff;
  padding: 4px 14px;
  border-radius: 4px;
  cursor: pointer;
  font-size: 12px;
  font-weight: 600;
  white-space: nowrap;
  transition: background 0.2s;
}

.sync-banner__retry:hover {
  background: rgba(255, 255, 255, 0.35);
}

@keyframes sk-slide-down {
  from { transform: translateY(-100%); }
  to { transform: translateY(0); }
}

@keyframes sk-slide-up {
  from { transform: translateY(0); }
  to { transform: translateY(-100%); }
}