style.css

@import url(//fonts.googleapis.com/css?family=Ubuntu:300,400,600,700&subset=latin);
@import url(//cdnjs.cloudflare.com/ajax/libs/twitter-bootstrap/3.3.2/css/bootstrap.min.css);
@import url(//cdnjs.cloudflare.com/ajax/libs/font-awesome/4.3.0/css/font-awesome.min.css);

body {
    background-image: url('img/symphony.png');
    font-family: 'Ubuntu';
}

body::after {
    content: "";
    display: block;
    position: fixed;
    z-index: -1;   
    width: 100%;
    height: 100%;
    background-image: url('img/doodles.png');
    animation: animatedBackground 150s linear infinite;
    opacity: 0.5;
    top: 0;
    left: 0;
    bottom: 0;
    right: 0;
}

.drop-target {
    padding: 10px;
    border: 1px gray dashed;
    background: #f5fdf5;
}

.draggable {
    cursor: move;
}

.container {
    background: rgba(255, 255, 255, 0.9);
    border-radius: 31px;
    padding-bottom: 25px;
    margin-bottom: 25px;
    margin-top: 25px;
    border: 2px #f4f4f4 solid;
    color: #444433;
    box-shadow: 4px 5px 5px rgba(0, 0, 0, 0.08);
}

@media only screen and (max-device-width: 480px) {
    main {
        width: 96%;
        margin: -210px 0 0 -150px;
    }
}

@keyframes animatedBackground {
	from { background-position: 0 0; }
	to { background-position: 100% 100%; }
}