/* ════════════════ SHEETS (36pt corners, like the app's presented sheets) ════════════════ */
.sheetcard {
  position: relative; border-radius: var(--r-sheet);
  background: linear-gradient(180deg, rgba(20,28,24,.78), rgba(8,17,12,.72));
  -webkit-backdrop-filter: blur(18px) saturate(140%); backdrop-filter: blur(18px) saturate(140%);
  box-shadow: inset 0 0 0 1px var(--hair-soft), inset 0 1px 0 rgba(255,255,255,.05), 0 50px 100px -50px rgba(0,0,0,.9);
}
.sheetcard .edge::before { border-width: 3px; filter: blur(6px); }