/* viewer.css — embeddable standalone viewer chrome
 * DESIGN RULE:
 *   body / viewer-root → overflow:hidden  (외부 스크롤 차단)
 *   flip-stage         → overflow:visible (3D 페이지 넘김 애니메이션이 잘리지 않도록)
 */
html, body { height: 100%; overflow: hidden; background: transparent; }
body { display: flex; }

/* viewer-root clips the outermost scroll only */
.viewer-root {
  flex: 1;
  display: flex;
  min-width: 0;
  min-height: 0;
  overflow: hidden;
}

/* flip-stage must NOT clip — page-flip animations translate/rotate outside bounds */
.flip-stage {
  flex: 1;
  min-width: 0;
  min-height: 0;
  overflow: visible;
}

.viewer-loading, .viewer-error {
  display: flex; flex-direction: column; align-items: center; gap: var(--space-3);
  font-size: var(--text-sm);
  font-weight: 500;
  transition: color 0.3s ease;
}
.viewer-loading[hidden], .viewer-error[hidden] { display: none; }
.viewer-loading__spinner {
  width: 36px; height: 36px;
  color: var(--flip-cover-a, var(--color-primary));
  animation: viewer-spin 900ms linear infinite;
  transition: color 0.3s ease;
}
@keyframes viewer-spin { to { transform: rotate(360deg); } }

/* Backdrop-based Loader Styles */
.backdrop-dark .viewer-loading { color: rgba(255, 255, 255, 0.65); }
.backdrop-wood .viewer-loading { color: rgba(255, 255, 255, 0.7); }
.backdrop-white .viewer-loading { color: #4b5563; }
.backdrop-ivory .viewer-loading { color: #5c4e3c; }

/* Handle white cover on white backdrop edge case */
.backdrop-white.theme-cover-white .viewer-loading__spinner,
.backdrop-ivory.theme-cover-white .viewer-loading__spinner {
  color: #4b5563;
}
/* Ensure spinner has good contrast on dark/wood backdrops if cover is white */
.backdrop-dark.theme-cover-white .viewer-loading__spinner,
.backdrop-wood.theme-cover-white .viewer-loading__spinner {
  color: #ffffff;
}

.viewer-layout-toggle {
  position: absolute;
  top: 16px;
  right: 16px;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: color-mix(in oklab, #ffffff 85%, transparent);
  border: 1px solid rgba(0,0,0,0.1);
  color: #333;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 12px rgba(0,0,0,0.1);
  z-index: 30;
  opacity: 0.6;
  transition: opacity 0.25s ease, background-color 0.2s ease, transform 0.2s ease;
  cursor: pointer;
}
.viewer-layout-toggle:hover {
  opacity: 1;
  background: #ffffff;
  transform: scale(1.05);
}
.viewer-layout-toggle[hidden] { display: none; }
@media (max-width: 640px) {
  .viewer-layout-toggle {
    top: 12px;
    right: 12px;
    width: 36px;
    height: 36px;
  }
  .viewer-layout-toggle svg { width: 16px; height: 16px; }
}