body {
    background: url(background2.png) no-repeat center center fixed;
    -webkit-background-size: cover;
    -moz-background-size: cover;
    -o-background-size: cover;
    background-size: cover;
}

.callout {
    text-align: center;
    bagkground-color: rgba(0,0,0,.4);
    color: rgb(250,250,250);
    text-shadow: 2px 2px #000000;
}

h1 {
    font-size: 2.5em;
}

h3 {
    font-size: 1.75em;
}

img {
    max-width: 50%;
}

@media (max-width: 479px) {
    body {
        font-size: 10px;
    }
    .start {
        margin-top: 1em;
    }
}

@media (min-width: 480px) {
    body {
        font-size: 12px;
    }
    .start {
        margin-top: 4em;
    }
}
@media (min-width: 768px) {
    body {
        font-size: 14px;
    }
    .start {
        margin-top: 8em;
    }
}
@media (min-width: 992px) {
    body {
        font-size: 16px;
    }
    .start {
        margin-top: 8em;
    }
}