.modal {
    display: none;
    position: fixed;
    z-index: 1;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
 }
  form#studentForm button[type="submit"] {
    display: none;
 }

 .container {
    width: 95%;
    margin: auto;
 }
 table {
    border-collapse: collapse;
 }	
 table, th, td {
    border: 1px solid #ddd;
 }