* {
    box-sizing: border-box;
}

body {
    font-family: Arial, Helvetica, sans-serif;
    margin: 0;
    padding-top: 0;
    background-color: #d6d6d6;
}

header {
    padding: 30px;
    font-size: 35px;
    text-align: center;
}

body {
    display: flex;
}

nav ul {
    display: flex;
    flex-direction: column;
    width: 180px;
    background: #ccc;
    height: 100%;
    padding: 0;
    margin: 0;
}

nav ul {
    padding: 0;
    margin: 0;
}

nav li {
    overflow: auto;
    padding: 0;
    margin: 0;
    list-style-type: none;
}

nav li:first-child {
    position: center;
}

.logo {
    display: block;
    margin-left: 15%;
    margin-right: auto;
    margin-top: 1em;
    width: 100px;
}

nav li:nth-child(2) {
    margin-top: 15px;
}

nav li:last-child {
    margin-top: auto;
    margin-left: auto;
    margin-right: auto;
}

nav li a {
    color: black;
    padding: 4px 16px;
    display: block;
    text-decoration: none;
}

nav li a.active {
    background-color: #4b4b4b;
    color: #dbdbdb;
}

nav li a:hover:not(.active) {
    background-color: #555;
    color: white;
}

.nav-separator {
    background: url("../images/separator.png") no-repeat center;
    height: 1em;
    max-width: 85%;
}

main {
    margin-left: auto;
    margin-right: auto;
    padding: 0 15px 0;
    max-width: 900px;
    height: 100%;
    float: left;
}

main p{
    text-align: justify;
    text-indent: 1em;
}

main article img{
    display: block;
    width: 100%;
    max-width: 800px;
    margin: auto;
}

.blankBox{
    margin: 50px;
}

main header h2{
    font-size: 30px;
    padding: 0;
    margin: 0;
    text-align: left;
}

main header p{
    font-size: 20px;
    padding: 0;
    margin: 0;
    margin-top: 20px;
    text-align: left;
}

main footer{
    flex: 1;
    display: flex;
    flex-direction: row;
}
main footer p{
    font-style: italic;
    padding: 8px;
    margin: 0;
    width: 30%;
}


@media print {
    nav, main img, main article img {
        display: none;
    }
}

@media screen and (max-width: 600px) {
    body {
        font-size: 18px;
        flex-direction: column;
    }

    nav ul {
        width: 100%;
        padding: 0;
        margin: 0;
        font-size: 18px;
    }

    .nav-separator {
        width: 100%;
    }

    .logo {
        display: none;
        margin: auto;
    }
}