.cover-zoom-dialog {
  position: fixed;
  inset: 0;
  width: min(96vw, 1100px, calc(76dvh * var(--cover-width-ratio, .75) + 24px));
  max-width: min(96vw, 1100px);
  max-height: 96dvh;
  margin: auto;
  padding: 12px;
  overflow: auto;
  color: var(--ink);
  background: var(--paper);
  border: 1px solid var(--line);
}

.cover-zoom-dialog::backdrop { background: rgb(57 43 33 / 78%); }
.cover-zoom-header { display: flex; align-items: center; justify-content: space-between; gap: 12px; margin-bottom: 8px; }
.cover-zoom-header h2 { min-width: 0; overflow-wrap: anywhere; margin: 0; font: 600 18px/1.3 var(--font-heading); }
.cover-zoom-close { flex: 0 0 44px; width: 44px; height: 44px; padding: 0; border: 1px solid var(--line); border-radius: 2px; color: var(--ink); background: var(--paper); font: 400 30px/1 var(--font-body); cursor: pointer; }
.cover-zoom-close:focus-visible { outline: 3px solid var(--accent); outline-offset: 2px; }
.cover-zoom-media { display: grid; place-items: center; max-height: 76dvh; min-height: 0; }
.cover-zoom-media > * { grid-area: 1 / 1; }
.cover-zoom-image { display: block; width: 100%; height: 100%; min-height: 0; object-fit: contain; }
.cover-zoom-close:hover { background: var(--tint); }
.cover-zoom-image[hidden], .cover-zoom-error[hidden] { display: none; }
.cover-zoom-error { margin: 24px 0; padding: 16px; border-left: 3px solid var(--accent); background: var(--tint); }

@media (max-width: 520px) {
  .cover-zoom-dialog { width: calc(100vw - 12px); max-width: calc(100vw - 12px); max-height: calc(100dvh - 12px); padding: 8px; }
}