:root {
  --vala-app-stage-pad-x: clamp(20px, 1.9vw, 24px);
  --vala-app-stage-pad-y: clamp(14px, 1.2vw, 18px);
  --vala-app-stage-pad-bottom: clamp(22px, 1.9vw, 28px);
  --vala-section-gap: clamp(18px, 1.35vw, 20px);
  --vala-card-gap: clamp(16px, 1.25vw, 18px);
  --vala-stage-max-width: none;
}

/* 1) App frame: owns viewport/split only. */
.vala-app-shell,
.vala-app-shell__column,
.vala-main {
}

/* 2) Transport layer: transparent carrier. */
.vala-main__inner.vala-page-shell {
  width: 100%;
  max-width: none;
  margin: 0;
  padding: 0;
  background: transparent;
  border: 0;
  box-shadow: none;
}

/* 3) Page stage: single outer content shell. */
.vala-app-stage {
  width: 100%;
  max-width: var(--vala-stage-max-width);
  margin: 0;
  padding:
    var(--vala-app-stage-pad-y)
    var(--vala-app-stage-pad-x)
    var(--vala-app-stage-pad-bottom);
  display: flex;
  flex-direction: column;
  gap: var(--vala-section-gap);
}

/* 4) Shared grids */
.vala-grid-2,
.vala-grid-3,
.vala-grid-4 {
  display: grid;
  gap: var(--vala-card-gap);
}

.vala-grid-2 {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.vala-grid-3 {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.vala-grid-4 {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

@media (max-width: 900px) {
  :root {
    --vala-app-stage-pad-x: clamp(14px, 3.2vw, 16px);
    --vala-app-stage-pad-y: clamp(14px, 3.2vw, 16px);
  }

  .vala-grid-2,
  .vala-grid-3,
  .vala-grid-4 {
    grid-template-columns: 1fr;
  }
}