body {
  font-family: sans-serif;
  background-color: #f2f2f2;
  display: flex;
  justify-content: center;
  align-items: center;
  height: 100vh;
}
.container {
  background: white;
  padding: 30px;
  border-radius: 10px;
  box-shadow: 0px 0px 10px rgba(0,0,0,0.1);
  text-align: center;
}
input[type="file"] {
  margin: 10px 0;
}