.stage {
  display: flex;
  justify-content: center; /* horizontal */
  align-items: center;     /* vertical */
  height: 100vh;
  margin: -8px;
  background: linear-gradient(135deg, #0b3d24, #16a862);
}

.box {
  padding: 24px 32px;
  border-radius: 16px;
  background: #fff;
  color: #0b3d24;
  font: 700 1.2rem system-ui, sans-serif;
}