body {
    margin: 0;
    padding: 0;
    font-size: 18px;
}

a {
    color: inherit;
}

i {
    padding-top: 10px;
    padding-right: 10px;
}

.citation {
    font-style: italic;
}

.container {
    width: 100%;
    max-width: 500px;
    padding-left: 150px;
    padding-top: 50px;
}

@media only screen and (max-width: 500px) {
    .container {
        width: calc(100% - 20px);
        padding-left: 10px; 
        padding-right: 10px;
        padding-top: 50px;
    }
}

.container .hello {
    font-size: 100px;
    vertical-align: 20px;
}

.main-content {
    margin-bottom: 400px;
}

.dev-activities {
    width: 100%;
    max-width: 500px;
}

.dev-text {
    display: inline-block;
}

.first-column {
    display: inline-block;
    vertical-align: top;
}

footer {
    width: 100%;
    position: fixed;
    bottom: 0;
    z-index: 100;
}

footer > div {
    height: 150px;
    padding: 50px 100px;
    background-color: black;
    margin-top: 50px;
    color: white;
}

@media only screen and (max-width: 600px) {
    footer > div{
        padding-left: 10px;
        padding-right: 10px;
        width: 100% - 20px;
    }
}

header .logo {
    width: 80%;
    max-width: 1000px;  
}

footer .logo {
    width: 150px;
    margin-bottom: 20px;
}

.references {
    display: inline-block;
    vertical-align: top;
}