body {
    font-family: Arial;
    margin:0;
    padding:0;
}

.container {
    width:1680px;
    max-width:100%;
    margin:auto;
    padding:20px;
}

button {
    padding:10px 20px;
    background:#FF0000;
    color:white;
    border:none;
    cursor:pointer;
}

@media screen and (max-width: 1200px) {
    .container {
        width:100%;
    }
}

@media screen and (orientation: portrait) {
    body {
        transform: rotate(90deg);
        transform-origin: left top;
        width:100vh;
        height:100vw;
        overflow-x:hidden;
        position:absolute;
        top:100%;
        left:0;
    }
}