.container{display:flex;flex-direction:column;align-items:center;justify-content:center;height:100vh;text-align:center}.drop-zone{width:300px;height:150px;border:2px dashed #000;display:flex;align-items:center;justify-content:center;margin:20px 0}button{padding:10px 20px;font-size:16px}