.alert-danger {
    margin: 12px 12px 12px 0;
    padding: 20px 20px 20px 0;
    background-color: #f44336;
    color: white;
  }
.alert-success{
    margin: 12px 12px 12px 0;
    padding: 20px 20px 20px 0;
    background-color: #4CAF50;
    color: white;
}
.alert-warning{
    margin: 12px 12px 12px 0;
    padding: 20px 20px 20px 0;
    background-color: #ff9800;
    color: white;
}
.alert-info{
    margin: 12px 12px 12px 0;
    padding: 20px 20px 20px 0;
    background-color: #2196F3;
    color: white;
}
.closebtn {
    margin-left: 15px;
    color: white;
    font-weight: bold;
    float: right;
    font-size: 22px;
    line-height: 20px;
    cursor: pointer;
    transition: 0.3s;
}
.closebtn:hover {
color: black;
}