@import url(https://fonts.googleapis.com/css?family=Roboto+Mono:700);

body {
    font-family: 'Roboto Mono';   
}

.header h1 {
    font-size: 54px;
    text-align: center;
    margin-bottom: 0;
}

.header ul {
    display: flex;
    flex-direction: row;
    justify-content: space-between;
    padding: 0;
    max-width: 480px;
    margin-top: 0;
    margin-left: auto;
    margin-right: auto;
}

.header li {
    display: inline-block;
}

.footer {
    font-size: 10px;
    position:absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    background: white;
}

.footer dl {
    display: block;
    position: relative;
    left: 50%;
    transform: translateX(-120px);
    max-width: 480px;
    margin-top: 0;
    margin-bottom: 1ex;
}

.footer dt::after {
    content: ":";
}

.footer dt, .footer dd {
    display: inline;
}

.footer dd {
    margin-left: 0;
    margin-right: 2em;
}

.content {
    max-width: 480px;
    margin-left: auto;
    margin-right: auto;
}
@import url(https://fonts.googleapis.com/css?family=Roboto+Mono:700);

body {
    font-family: 'Roboto Mono';   
}

.header h1 {
    font-size: 54px;
    text-align: center;
    margin-bottom: 0;
}

.header ul {
    display: flex;
    flex-direction: row;
    justify-content: space-between;
    padding: 0;
    max-width: 480px;
    margin-top: 0;
    margin-left: auto;
    margin-right: auto;
}

.header li {
    display: inline-block;
}

.footer {
    font-size: 10px;
    position:fixed;
    bottom: 0;
    left: 0;
    width: 100%;
    background: white;
}

.footer dl {
    display: block;
    position: relative;
    left: 50%;
    transform: translateX(-120px);
    max-width: 480px;
    margin-top: 0;
    margin-bottom: 1ex;
}

.footer dt::after {
    content: ":";
}

.footer dt, .footer dd {
    display: inline;
}

.footer dd {
    margin-left: 0;
    margin-right: 2em;
}

.content {
    max-width: 480px;
    margin-left: auto;
    margin-right: auto;
    padding-bottom: 25px;
}

Fix footer to bottom of viewport
Fix footer to bottom of viewport
