:root {
  --tb-loading-spinner-size: 48px;
  --tb-loading-spinner-border-width: 4px;
  --tb-loading-spinner-track-color: rgba(0, 89, 255, 0.2);
  --tb-loading-spinner-active-color: #0059ff;
  --tb-loading-gap: 18px;
  --tb-loading-padding: 24px;
  --tb-loading-label-color: #1f2937;
  --tb-loading-label-size: 1.05rem;
  --tb-loading-label-letter-spacing: 0.5px;
  --tb-loading-label-font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --tb-loading-overlay-z: 16000;
  --tb-loading-overlay-backdrop: rgba(255, 255, 255, 0.75);
  --tb-loading-overlay-blur: 0px;
}

.tb-loading-overlay {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--tb-loading-overlay-backdrop);
  z-index: var(--tb-loading-overlay-z);
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transition: opacity 0.18s ease, visibility 0.18s ease;
  backdrop-filter: blur(var(--tb-loading-overlay-blur));
  -webkit-backdrop-filter: blur(var(--tb-loading-overlay-blur));
}

.tb-loading-overlay--fullscreen {
  position: fixed;
}

.tb-loading-overlay--visible {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
}

.tb-loading-overlay__content {
  display: flex;
  align-items: center;
  justify-content: center;
}

.tb-loading-spinner {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--tb-loading-gap);
  padding: var(--tb-loading-padding);
  color: var(--tb-loading-label-color);
}

.tb-loading-spinner__indicator {
  width: var(--tb-loading-spinner-size);
  height: var(--tb-loading-spinner-size);
  border-radius: 50%;
  border: var(--tb-loading-spinner-border-width) solid var(--tb-loading-spinner-track-color);
  border-top-color: var(--tb-loading-spinner-active-color);
  border-right-color: var(--tb-loading-spinner-active-color);
  animation: tb-loading-spinner-rotate 0.9s linear infinite;
}

.tb-loading-spinner__label {
  margin: 0;
  color: var(--tb-loading-label-color);
  font-size: var(--tb-loading-label-size);
  font-family: var(--tb-loading-label-font-family);
  letter-spacing: var(--tb-loading-label-letter-spacing);
  font-weight: 400;
  line-height: 1.2;
}

@keyframes tb-loading-spinner-rotate {
  to {
    transform: rotate(360deg);
  }
}