/* All volumes share one intrinsic grid track, sized by the longest panel. */
.td-volume-panels { display:grid; min-width:0; }
.td-volume-panels > .td-volume-panel { grid-area:1 / 1; min-width:0; align-self:start; }
.td-volume-panels > [aria-hidden="true"] { visibility:hidden; pointer-events:none; }
/* Interacting with tabs must never move this section, including focus changes. */
@media (prefers-reduced-motion:no-preference) {
  @supports (animation-timeline:view()) {
    .td-main > #volumes:not(:focus-within):not(:target) { animation-name:tender-volume-fade; }
    @keyframes tender-volume-fade {
      0%,100% { opacity:.08; }
      22%,78% { opacity:1; }
    }
  }
}