html, body {height: 100%;}.container {height: 100%;width:100%;background-image: url("images/dinner-table-444434_1920.jpg");background-size: cover;background-repeat:no-repeat;}.container-box {display:inline-block;padding:10px;background: rgba(255, 255, 255, .8);border: 1px solid #fff;position: fixed;top: 55%;left: 0;}.modal-content {background: rgba(255, 255, 255, .7);}.rotated {-moz-transform:rotate(-90deg);-ms-transform:rotate(-90deg);-o-transform:rotate(-90deg);-webkit-transform:rotate(-90deg);transform-origin: top left;}