/* Viewer-specific styles */
.viewer-shell {
  background: #1a1d29;
  padding: 0;
}
.viewer-toolbar {
  background: var(--navy-dark);
  color: #cdd4ee;
  padding: 0.75rem var(--gutter);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
  border-bottom: 1px solid rgba(255,255,255,0.08);
}
.viewer-toolbar__group {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  flex-wrap: wrap;
}
.viewer-btn {
  background: rgba(255,255,255,0.06);
  color: #cdd4ee;
  border: 1px solid rgba(255,255,255,0.08);
  padding: 0.5rem 0.85rem;
  border-radius: 4px;
  font: inherit;
  font-size: 0.88rem;
  font-weight: 500;
  cursor: pointer;
  transition: background 120ms ease, color 120ms ease;
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
}
.viewer-btn:hover:not(:disabled) {
  background: rgba(255,255,255,0.14);
  color: var(--white);
}
.viewer-btn:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}
.viewer-btn--primary {
  background: var(--sandstone);
  color: var(--white);
  border-color: var(--sandstone);
}
.viewer-btn--primary:hover {
  background: #9c5728;
  color: var(--white);
}
.viewer-pageinfo {
  font-size: 0.9rem;
  color: #aab2d4;
  min-width: 8em;
  text-align: center;
}
.viewer-pageinfo input {
  width: 3em;
  background: rgba(0,0,0,0.3);
  color: var(--white);
  border: 1px solid rgba(255,255,255,0.15);
  border-radius: 3px;
  padding: 0.25rem 0.4rem;
  font: inherit;
  font-size: 0.9rem;
  text-align: center;
}
.viewer-canvas-wrap {
  background: #1a1d29;
  padding: 2rem var(--gutter) 3rem;
  min-height: 60vh;
  display: flex;
  justify-content: center;
  align-items: flex-start;
  overflow-x: auto;
}
.viewer-canvas {
  background: var(--white);
  box-shadow: 0 20px 60px -10px rgba(0,0,0,0.5);
  display: block;
  max-width: 100%;
  height: auto;
}
.viewer-loading,
.viewer-error {
  color: #aab2d4;
  text-align: center;
  padding: 4rem 2rem;
  font-size: 0.95rem;
}
.viewer-error {
  max-width: 38em;
  margin: 0 auto;
}
.viewer-error h3 {
  color: var(--white);
  margin-bottom: 0.5rem;
}
.viewer-error a {
  color: var(--sky);
}
.viewer-spinner {
  display: inline-block;
  width: 32px;
  height: 32px;
  border: 3px solid rgba(255,255,255,0.15);
  border-top-color: var(--sandstone);
  border-radius: 50%;
  animation: spin 800ms linear infinite;
  margin-bottom: 1rem;
}
@keyframes spin { to { transform: rotate(360deg); } }

@media (max-width: 600px) {
  .viewer-toolbar { padding: 0.5rem var(--gutter); gap: 0.5rem; }
  .viewer-btn { padding: 0.4rem 0.6rem; font-size: 0.82rem; }
  .viewer-pageinfo { font-size: 0.82rem; min-width: 6em; }
  .viewer-canvas-wrap { padding: 1rem var(--gutter) 2rem; }
}