.operation-banner {
  position: fixed;
  z-index: 100000;
  bottom: 20px;
  top: auto;
  left: 50%;
  transform: translate(-50%, 12px);
  width: min(560px, calc(100vw - 28px));
  box-sizing: border-box;
  padding: 14px 16px;
  color: #fff;
  background: rgba(25, 29, 36, .45);
  border: 1px solid rgba(255, 255, 255, .14);
  border-radius: 14px;
  box-shadow: 0 10px 35px rgba(0, 0, 0, .28);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transition: opacity .22s ease, transform .22s ease, bottom .22s ease;
  font: 14px/1.45 system-ui, sans-serif;
}

.operation-banner.is-visible {
  opacity: 1;
  visibility: visible;
  transform: translate(-50%, 0);
  pointer-events: auto;
}

.operation-banner .ob-row {
  display: flex;
  align-items: flex-start;
  gap: 11px;
}

.operation-banner .ob-icon {
  flex: 0 0 24px;
  width: 24px;
  text-align: center;
  font-size: 19px;
}

.operation-banner .ob-content {
  flex: 1;
  min-width: 0;
  overflow-wrap: anywhere;
  white-space: pre-line;
}

.operation-banner .ob-close {
  border: 0;
  padding: 0 2px;
  color: #fff;
  background: transparent;
  font-size: 21px;
  cursor: pointer;
}

.operation-banner .ob-progress {
  height: 4px;
  margin-top: 12px;
  overflow: hidden;
  border-radius: 99px;
  background: rgba(255, 255, 255, .16);
}

.operation-banner .ob-progress-fill {
  width: 35%;
  height: 100%;
  border-radius: inherit;
  background: #8ab4f8;
}

.operation-banner .ob-progress-label {
  display: none;
  margin-top: 9px;
  font-size: 12px;
  line-height: 1.2;
  text-align: right;
  font-variant-numeric: tabular-nums;
}

.operation-banner.is-determinate .ob-progress-label {
  display: block;
}

.operation-banner.is-determinate .ob-progress-fill {
  animation: none !important;
  transform: none;
  transition: width .3s linear;
}

.operation-banner.is-busy .ob-progress-fill {
  animation: operationBannerIndeterminate 1.2s ease-in-out infinite;
}

.operation-banner.is-success .ob-icon { color: #8fe0a5; }
.operation-banner.is-error .ob-icon { color: #ff9999; }
.operation-banner.is-success .ob-progress { display: none; }

@keyframes operationBannerIndeterminate {
  from { transform: translateX(-120%); }
  to { transform: translateX(330%); }
}

@media (prefers-reduced-motion: reduce) {
  .operation-banner,
  .operation-banner .ob-progress-fill {
    animation: none !important;
    transition: none !important;
  }
}