.file-grid { display: grid; gap: 28px; }
.folder {
  position: relative; margin-top: 26px; padding: 22px 12px 14px;
  background: var(--manila) var(--tex-manila) 0 0 / 512px; border: 1px solid var(--manila-deep);
  box-shadow: inset 0 0 0 1px rgb(255 255 255 / .18), var(--shadow-paper);
}
.folder__tab {
  position: absolute; top: -22px; left: 14px; padding: 3px 12px 2px;
  background: var(--manila) var(--tex-manila) 0 0 / 512px; border: 1px solid var(--manila-deep); border-bottom: 0;
  font: 600 11px/16px var(--font-printed); letter-spacing: .1em; text-transform: uppercase; color: var(--carbon);
}
.pages { position: relative; width: min(100%, 300px); margin-inline: auto; aspect-ratio: var(--ratio, .56); }
.page:nth-child(1) { --i: 0; } .page:nth-child(2) { --i: 1; } .page:nth-child(3) { --i: 2; } .page:nth-child(4) { --i: 3; } .page:nth-child(5) { --i: 4; }
.page {
  position: absolute; left: 0; top: 0; width: calc(100% - 24px); height: calc(100% - 24px); padding: 0; border: 0; cursor: zoom-in;
  background: var(--bond) var(--tex-bond) 0 0 / 256px; box-shadow: 0 1px 2px rgb(29 28 26 / .25), 0 6px 14px -6px rgb(29 28 26 / .3);
  transform: translate(calc(var(--i) * 6px), calc(var(--i) * 6px)); z-index: calc(10 - var(--i));
  transition: transform 220ms var(--ease-feed), opacity 220ms ease;
}
.page img { width: 100%; height: 100%; object-fit: contain; }
.page.is-leaving { transform: translate(0, -16px); opacity: 0; }
.page.no-anim { transition: none; }
.page.is-missing img { visibility: hidden; }
.page.is-missing::after { content: attr(data-ph); position: absolute; inset: 0; display: grid; place-items: center; padding: 12px; text-align: center; font: italic 400 14px/20px var(--font-typed); color: var(--ink-soft); }
.stack-ctl { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; margin-top: 16px; }
.stack-ctl .btn { min-height: 44px; padding: 0 8px; font-size: 13px; background-color: var(--bond); }
.stack-ctl .count { grid-row: 1; grid-column: 1 / -1; font: 600 13px/16px var(--font-printed); letter-spacing: .06em; color: var(--carbon); text-align: center; }
.folder .caption { margin-top: 10px; text-align: center; }

.contents__title { font: 600 12px/16px var(--font-printed); letter-spacing: .12em; text-transform: uppercase; color: var(--carbon); padding-bottom: 6px; border-bottom: 2px solid var(--carbon); }
.tabs-list { margin-top: 6px; }
.tabs-list li { margin-top: 14px; padding-left: 12px; border-left: 2px solid var(--rule); }
.tabs-list b { display: block; font-size: 16px; line-height: 22px; }
.tabs-list span { display: block; font-size: 14px; line-height: 21px; color: var(--ink-soft); }
.tabs-list .extras { border-left-color: var(--stamp); }
.buy-row { margin-top: 28px; }

@media (min-width: 760px) {
  .file-grid { grid-template-columns: 330px 1fr; gap: 36px; align-items: start; }
  .folder { position: sticky; top: 24px; padding-inline: 20px; }
  .pages { width: min(100%, 270px); }
  .tabs-list b { font-size: 18px; }
  .tabs-list span { font-size: 15px; }
}