body {
  background: url('img/iti.jpg') no-repeat center center fixed;
  background-size: cover;
  font-family: Arial, sans-serif;
  color: white;
  text-align: center;
  padding-top: 100px;
}
form {
    background-color: rgba(0, 0, 0, 0.6);
    padding: 20px;
    border-radius: 10px;
    display: inline-block;
}
input {
    margin: 10px;
    padding: 10px;
    border-radius: 5px;
}