/* image_viewer_sidesheet: the script-image sidesheet (backdrop + slide-in panel).
   Every rule scoped under the form root :where(.ch-sidesheet-root), zero specificity. */

:where(.ch-sidesheet-root) .ch-sidesheet-backdrop {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background: rgba(0, 0, 0, 0.5);
  z-index: calc(var(--ch-z-overlay) + 10);
  opacity: 0;
  transition: opacity 0.3s ease;
}

:where(.ch-sidesheet-root) .ch-sidesheet-backdrop.ch-sidesheet-visible {
  opacity: 1;
}

:where(.ch-sidesheet-root) .ch-sidesheet-container {
  position: fixed;
  right: 0;
  top: 0;
  width: 40%;
  height: 100vh;
  z-index: calc(var(--ch-z-overlay) + 11);
  background: var(--ch-bg-card);
  box-shadow: -4px 0 24px rgba(0, 0, 0, 0.15);
  transform: translateX(100%);
  transition: transform 0.3s ease;
  display: flex;
  flex-direction: column;
  font-family: var(--ch-font-primary);
}

:where(.ch-sidesheet-root) .ch-sidesheet-container.ch-sidesheet-visible {
  transform: translateX(0);
}

@media (max-width: 768px) {
  :where(.ch-sidesheet-root) .ch-sidesheet-container {
    width: 100%;
  }
}

:where(.ch-sidesheet-root) .ch-sidesheet-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  padding: var(--ch-space-md);
  border-bottom: 1px solid var(--ch-border);
  flex-shrink: 0;
}

:where(.ch-sidesheet-root) .ch-sidesheet-header-info {
  flex: 1;
  min-width: 0;
}

:where(.ch-sidesheet-root) .ch-sidesheet-patient-name {
  font-size: 16px;
  font-weight: 600;
  color: var(--ch-text-primary);
  margin: 0 0 4px 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

:where(.ch-sidesheet-root) .ch-sidesheet-meta {
  font-size: 13px;
  color: var(--ch-text-secondary);
  margin: 0;
}

:where(.ch-sidesheet-root) .ch-sidesheet-close-btn {
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
  margin-left: var(--ch-space-sm);
  color: var(--ch-text-secondary);
  font-size: 24px;
  line-height: 1;
  flex-shrink: 0;
  transition: color 0.15s ease;
}

:where(.ch-sidesheet-root) .ch-sidesheet-close-btn:hover {
  color: var(--ch-text-primary);
}

:where(.ch-sidesheet-root) .ch-sidesheet-content {
  flex: 1;
  overflow: hidden;
  padding: var(--ch-space-md);
  display: flex;
  flex-direction: column;
  align-items: center;
  min-height: 0;
  touch-action: pan-y;
}

:where(.ch-sidesheet-root) .ch-sidesheet-image-wrapper {
  position: relative;
  flex: 1;
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 0;
}

:where(.ch-sidesheet-root) .ch-sidesheet-image-wrapper img,
:where(.ch-sidesheet-root) .ch-sidesheet-image-wrapper canvas {
  width: 100%;
  height: 100%;
  object-fit: contain;
  border-radius: var(--ch-radius-md);
  border: 1px solid var(--ch-border);
}

:where(.ch-sidesheet-root) .ch-sidesheet-spinner {
  display: none;
  position: absolute;
  top: 12px;
  right: 12px;
  width: 28px;
  height: 28px;
  border: 3px solid var(--ch-border);
  border-top-color: var(--ch-accent-primary);
  border-radius: 50%;
  animation: pxSpin 0.8s linear infinite;
}

:where(.ch-sidesheet-root) .ch-sidesheet-spinner.ch-sidesheet-active {
  display: block;
}

:where(.ch-sidesheet-root) .ch-sidesheet-status {
  display: none;
  padding: var(--ch-space-sm) var(--ch-space-md);
  margin-top: var(--ch-space-sm);
  font-size: 13px;
  color: var(--ch-text-secondary);
  background: var(--ch-bg-secondary);
  border-radius: var(--ch-radius-md);
  text-align: center;
  width: 100%;
}

:where(.ch-sidesheet-root) .ch-sidesheet-status.ch-sidesheet-active {
  display: block;
}

:where(.ch-sidesheet-root) .ch-sidesheet-actions {
  padding: var(--ch-space-md);
  border-top: 1px solid var(--ch-border);
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

:where(.ch-sidesheet-root) .ch-sidesheet-download-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 10px 20px;
  font-size: 14px;
  font-weight: 500;
  font-family: var(--ch-font-primary);
  color: var(--ch-text-inverse);
  background: var(--ch-accent-primary);
  border: none;
  border-radius: var(--ch-radius-md);
  cursor: pointer;
  transition: background 0.15s ease;
  min-height: 44px;
}

:where(.ch-sidesheet-root) .ch-sidesheet-download-btn:hover:not(:disabled) {
  background: var(--ch-accent-primary-hover);
}

:where(.ch-sidesheet-root) .ch-sidesheet-download-btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

:where(.ch-sidesheet-root) .ch-sidesheet-nav {
  display: none;
  align-items: center;
  gap: var(--ch-space-sm);
}

:where(.ch-sidesheet-root) .ch-sidesheet-nav.visible {
  display: flex;
}

:where(.ch-sidesheet-root) .ch-sidesheet-nav-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  background: var(--ch-bg-secondary);
  border: 1px solid var(--ch-border);
  border-radius: var(--ch-radius-md);
  cursor: pointer;
  transition: background 0.15s ease;
  padding: 0;
}

:where(.ch-sidesheet-root) .ch-sidesheet-nav-btn:hover:not(:disabled) {
  background: var(--ch-border);
}

:where(.ch-sidesheet-root) .ch-sidesheet-nav-btn:disabled {
  opacity: 0.3;
  cursor: not-allowed;
}

:where(.ch-sidesheet-root) .ch-sidesheet-nav-btn svg {
  width: 20px;
  height: 20px;
  fill: var(--ch-text-primary);
}