.viewer-loading {
  --loading-width: 28rem;
  --loading-bar-height: var(--radiant-space-2);
  --loading-overlay: color-mix(in srgb, var(--radiant-color-canvas) 88%, transparent);
  --loading-motion: 1.4s;
  position: fixed;
  inset: 0;
  z-index: var(--radiant-z-feedback);
  display: grid;
  place-items: center;
  padding: var(--radiant-space-5);
  box-sizing: border-box;
  background: var(--loading-overlay);
  color: var(--radiant-color-text);
  font-family: var(--radiant-font-family);
}
.viewer-loading__card {
  width: min(var(--loading-width), 100%);
  max-height: calc(100dvh - 2 * var(--radiant-space-5));
  overflow: auto;
  box-sizing: border-box;
  display: grid;
  gap: var(--radiant-space-5);
  padding: calc(2 * var(--radiant-space-4));
  border: 1px solid var(--radiant-color-border);
  border-radius: var(--radiant-radius-xl);
  background: var(--radiant-color-surface);
  box-shadow: var(--radiant-shadow-panel);
  backdrop-filter: blur(var(--blur-glass));
}
.viewer-loading__brand {
  display: flex;
  align-items: center;
  gap: var(--radiant-space-3);
  color: var(--radiant-color-accent);
  font-size: var(--radiant-topbar-brand-font-size);
  font-weight: var(--radiant-topbar-brand-font-weight);
}
.viewer-loading__brand img { flex-shrink: 0; width: auto; height: var(--topbar-content); object-fit: contain; }
.viewer-loading__brand span { min-width: 0; overflow-wrap: anywhere; line-height: 1.4; }
.viewer-loading__card h1 {
  margin: 0 0 var(--radiant-space-2);
  color: var(--radiant-color-text);
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-regular);
  line-height: 1.3;
}
.viewer-loading__card p { margin: 0; font-size: var(--font-size-sm); line-height: 1.5; }
.viewer-loading__message, .viewer-loading__hint { color: var(--radiant-color-muted); }
.viewer-loading__steps {
  display: flex;
  flex-wrap: wrap;
  gap: var(--radiant-space-3);
  padding: 0;
  margin: 0;
  list-style: none;
  color: var(--radiant-color-muted);
  font-size: var(--font-size-xs);
  counter-reset: loading-step;
}
.viewer-loading__steps li { display: flex; align-items: center; gap: var(--radiant-space-2); }
.viewer-loading__steps li::before { counter-increment: loading-step; content: counter(loading-step, decimal-leading-zero); }
.viewer-loading__steps li[data-active], .viewer-loading__steps li[data-complete] { color: var(--radiant-color-accent); }
.viewer-loading__progress { display: grid; gap: var(--radiant-space-2); }
.viewer-loading progress {
  display: block;
  appearance: none;
  width: 100%;
  height: var(--loading-bar-height);
  border: 0;
  border-radius: var(--radiant-radius-sm);
  background: var(--radiant-color-border);
  accent-color: var(--radiant-color-accent);
  overflow: hidden;
}
.viewer-loading progress::-webkit-progress-bar { background: var(--radiant-color-border); border-radius: inherit; }
.viewer-loading progress::-webkit-progress-value { background: var(--radiant-color-accent); border-radius: inherit; transition: width var(--radiant-transition-fast); }
.viewer-loading progress::-moz-progress-bar { background: var(--radiant-color-accent); border-radius: inherit; }
.viewer-loading progress:indeterminate {
  background: linear-gradient(90deg, var(--radiant-color-border) 35%, var(--radiant-color-accent) 50%, var(--radiant-color-border) 65%);
  background-size: 200% 100%;
  animation: viewer-loading-pulse var(--loading-motion) linear infinite;
}
.viewer-loading progress:indeterminate::-webkit-progress-bar { background: transparent; }
.viewer-loading__count { color: var(--radiant-color-muted); font-size: var(--font-size-xs); }
.viewer-loading__clouds { display: grid; gap: var(--radiant-space-3); list-style: none; margin: 0; padding: 0; }
.viewer-loading__clouds li {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: var(--radiant-space-3);
  padding-bottom: var(--radiant-space-3);
  border-bottom: 1px solid var(--radiant-color-border);
  font-size: var(--font-size-sm);
}
.viewer-loading__clouds li span:first-child { overflow-wrap: anywhere; min-width: 0; }
.viewer-loading__clouds li span:last-child { flex-shrink: 0; color: var(--radiant-color-muted); font-size: var(--font-size-xs); }
.viewer-loading__clouds li[data-state="ready"] span:last-child { color: var(--radiant-color-accent); }
.viewer-loading__clouds li[data-state="error"] span:last-child { color: var(--radiant-color-danger); }
.viewer-loading[data-state="error"] h1 { color: var(--radiant-color-danger); }
.viewer-loading[data-state="error"] progress { accent-color: var(--radiant-color-danger); }
.viewer-loading[data-state="error"] progress::-webkit-progress-value { background: var(--radiant-color-danger); }
.viewer-loading__actions { display: flex; flex-wrap: wrap; gap: var(--radiant-space-2); }
.viewer-loading__actions button {
  padding: var(--btn-padding);
  border: 1px solid var(--radiant-color-border);
  border-radius: var(--radiant-radius-sm);
  background: var(--radiant-color-accent-soft);
  color: var(--radiant-color-text);
  font: inherit;
  font-size: var(--font-size-sm);
  cursor: pointer;
}
.viewer-loading__actions button:hover { background: var(--radiant-color-accent); color: var(--radiant-color-canvas); }
.viewer-streaming {
  position: fixed;
  bottom: var(--margin-glass);
  right: var(--margin-glass);
  z-index: var(--radiant-z-feedback);
  display: flex;
  align-items: center;
  gap: var(--radiant-space-2);
  max-width: calc(100vw - 2 * var(--margin-glass));
  box-sizing: border-box;
  padding: var(--radiant-space-2) var(--radiant-space-3);
  border: 1px solid var(--radiant-color-border);
  border-radius: var(--radiant-radius-sm);
  background: var(--radiant-color-surface);
  color: var(--radiant-color-muted);
  font: var(--font-size-xs) var(--radiant-font-family);
  pointer-events: none;
}
.viewer-streaming::before { content: ""; width: var(--radiant-space-2); height: var(--radiant-space-2); border-radius: 50%; background: var(--radiant-color-accent); }
.viewer-streaming[data-error]::before { background: var(--radiant-color-danger); }
@keyframes viewer-loading-pulse { to { background-position: -200% 0; } }
@media (max-width: 599px) {
  .viewer-loading { padding: var(--radiant-space-4); }
  .viewer-loading__card { padding: var(--radiant-space-5); max-height: calc(100dvh - 2 * var(--radiant-space-4)); }
}
@media (prefers-reduced-motion: reduce) {
  .viewer-loading progress:indeterminate { animation: none; }
}