body {
    background-image: url('dark_wood.png');
    background-position: center;
    text-align: center;
    color: #FFFFFF;
    margin: 0;
    box-sizing: border-box;
}

div {
    box-sizing: border-box;
}

.main {
    margin: auto;
    position:absolute;
    left: 10%;
    right: 10%;
    margin-left:auto;
    margin-right:auto;
    top: 10%;
    bottom: 10%;
    background-image: url('countless_circles.png');
    background-size: contain;
    background-repeat: no-repeat;
    background-position: center;
    white-space: nowrap;
    min-height: 256px;
}

.main .centering-box {
    height: 100%;
    width: 0;
    vertical-align: middle;
    display: inline-block;
}

.main .intro {
    vertical-align: middle;
    display: inline-block;
    white-space: normal;
    padding: 10px;
}

@media screen and (max-width: 1024px){
    .main {
        left: 5px;
        right: 5px;
    }
}