frontend/src/styles/materials.css

.material-bar {
  background: rgba(235, 231, 224, 0.82);
  backdrop-filter: saturate(1.4) blur(12px);
  -webkit-backdrop-filter: saturate(1.4) blur(12px);
  border-bottom: 1px solid var(--separator);
}

.sheet-material {
  background: var(--card);
  border-radius: 20px 20px 0 0;
  box-shadow: 0 -8px 40px rgba(43, 42, 38, 0.14);
}

.surface-card {
  background: var(--card);
  border: 1px solid var(--separator);
  border-radius: var(--radius);
  box-shadow: var(--shadow-1);
}

@media (prefers-reduced-transparency: reduce) {
  .material-bar,
  .sheet-material,
  .surface-card {
    backdrop-filter: none;
    -webkit-backdrop-filter: none;
    background: var(--surface-solid);
  }
}

@media (prefers-contrast: more) {
  .material-bar,
  .sheet-material,
  .surface-card {
    border-color: rgba(32, 32, 32, 0.28);
    box-shadow: none;
  }
}