.stage { 
  width: 1024px; 
  height: 1024px; 
  background: #222; 
  border-radius: 16px; 
  box-shadow: 0 10px 30px rgba(0,0,0,.4); 
  overflow: hidden; 
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: center;
}

.file-input-label {
  display: flex;
  align-items: center;
  gap: 8px;
  background: #2f7;
  color: #111;
  font-weight: 700;
  padding: 10px 14px;
  border-radius: 10px;
  cursor: pointer;
  transition: background 0.2s;
}

.file-input-label:hover {
  background: #3f8;
}

.file-input-label input[type="file"] {
  display: none;
}