.stage {
  position: relative;
  z-index: 1;
  display: flex;
  justify-content: center;
  width: 100%;
  min-height: 100vh;
  align-items: center; 

}

.stage-inner {
  position: relative;
  width: min(100%, 370px);
  height: min(100vh, 860px);
  aspect-ratio: 9 / 16;

  overflow: hidden;

  background: rgba(0, 20, 30, 0.2);
  backdrop-filter: blur(10px);
  box-shadow: 0 0 40px rgba(0,255,255,0.2);
}


/* Stage's dark glass base */
.stage-inner::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 0;

  background:
    radial-gradient(circle at top center,
      rgba(12, 34, 48, 0.22),
      rgba(2, 8, 12, 0.26)
    );
  pointer-events: none;
}