body {
    background: lightgreen;
    color: black;
}

div.container {
    background: white;
    margin-left: auto;
    margin-right: auto;
    padding: 10px;
    max-width: 1000px;
    overflow: auto;
    border-radius: 5px;
}

div.header {
    min-height: 85px;
}

@media only screen and (max-width: 600px) {
    div.header {
	min-height: 50px;
    }
}

div.header img {
    float: left;
    max-width: 30%;
}

div.header a {
    font-style: bold;
    font-size: 40px;
    padding-top: 10px;
    margin-left: 35%;
    display: block;
}

div.header a:visited,div.header a:link {
    text-decoration:none;
    font-weight:bold;
    color: black;
}

@media only screen and (max-width: 1000px) {
    div.header a {
	font-size: 24px !important;
    }
}

div.sidebar {
    float: right;
    max-width: 40%;
    width: 200px;
    padding-right: 10px;
    margin-left: 10px;
}

div.sidebar ul {
    list-style-type: none;
    padding-left: 0px;
}

div.footer {
    clear: both;
    font-size: small;
}

.date {
    display: flex;
    justify-content: space-between;
    font-style: italic;
    margin-right: 2%;
    color: gray;
}

div.code {
    background: lightgray;
    display: inline-block;
    padding: 1em;
    margin-left: 1.5em;
    border-style: dashed;
    border-width: thin;
    border-color: black;
    font-family: monospace;
}

span.next {
    float: right;
}