*{
    margin:0;
    padding:0;
}

.demo{
    height:100vh;
    width: 100%;
}

.demo model-viewer{
    width:100%;
    height:100%;
}

.btn-container{
    position:absolute;
    bottom:50px;
    width:100%;
    text-align:center;
}

button{
    border:none;
    background: #edda73;
    height:40px;
    width:150px;
    margin:5px 15px;
    cursor:pointer;
    font-weight: bold;
    font-size: 16px;
}
button:focus{
    outline:none;
}