html {
    height: 100%;
    width: 100%;
    background: url("../img/background.jpg") no-repeat center center fixed; 
    -webkit-background-size: cover;
    -moz-background-size: cover;
    -o-background-size: cover;
    background-size: cover;
    overflow: hidden;
    font-size: calc(1em + 1vw);
}

body {
    height: 100%;
    width: 100%;
    margin: 0;
    background-color: rgb(0, 0, 0, 0.65);
    display: block;
    position: absolute;
    font-family: 'Helvetica Neue', 'Open Sans', sans-serif; 
}

.main, footer {
    text-align: center;
    position: absolute;
    left: 50%;
    margin-right: -50%;
    transform: translate(-50%, -50%);
    color: white;
}

.main {
    top: 40%;
    padding-bottom: 1.5em;
}

.logo {
    height: 25%;
    width: 25%;
    border-radius: 10%;
    margin: 0 0 1%;
}

h1 {
    font-size: 1.5em;
    font-weight: 300;
}

footer {
    bottom: 0;
}

footer p {
    font-size: 0.5em;
}

.main p { 
    font-size: 1em;
}

a {
    color: white;
} 

.main a {
    text-decoration:  none;
    background: #0066ff;
    padding: 0.5em 3em 0.5em 3em;
    border-radius: 1em;
} 

@media only screen and (max-height: 400px) {
    .logo {
        display: none;
    }
}

@media only screen and (min-width: 961px) {
    .logo {
        height: 10%;
        width: 10%;
    }
    h1 {
        font-size: 0.75em;
    }
    footer p {
        font-size: 0.3em;
    }
    .main p { 
        font-size: 0.5em;
    }
}