* {
    box-sizing: border-box;
}

.modal {
    display: none; /* Hidden by default */
    position: fixed;
    z-index: 1; /* Sit on top */
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    overflow: auto;
    background-color: rgba(0,0,0,0.4);
}

.modal-content {
    background-color: #fefefe;
    margin: 5% auto; /* 5% margin from the top */
    padding: 20px;
    border: 1px solid #888;
    width: 80%;
    height: auto; /* 80% of the viewport height */
}

.modal-content-body {
    overflow-y: hidden; /* Enable vertical scrolling */
    flex-grow: 1;
}

.footer {
    text-align: center;
}

iframe {
    width: 100%;
    height: 100%;
    border: none;
    overflow: hidden; /* Hide overflow */
}