* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    font-size: 12px;
    background-color: grey;
    color: black;
}

p {
    margin-bottom: 0.5em;
    text-shadow: 0 1px 1px rgba(255,255,255,0.5);
}

h1 {
    font-size: 1.7em;
    text-align: center;
    margin-top: 1.0em;
    margin-bottom: 0.5em;
    text-shadow: 0 1px 1px rgba(255,255,255,0.5);
}

h2 {
    font-size: 1.5em;
    text-align: center;
    margin-top: 1.0em;
    margin-bottom: 0.5em;
    text-shadow: 0 1px 1px rgba(255,255,255,0.5);
}

h3 {
    font-size: 1.2em;
    text-align: left;
    margin-top: 1.0em;
    margin-bottom: 0.5em;
    text-shadow: 0 1px 1px rgba(255,255,255,0.5);
}

.divHeader {
    display: block;
    background-color: black;
}

.divHeader h1 {
    font-size: 30px;
    color: yellow;
    margin: 0;
    text-shadow: none;
}

.divContent {
    padding-left: 10px;
    padding-right: 10px;
}

.divCode {
    background-color: black;
    color: green;
    font-family: Courier New, Courier, monospace;
    text-shadow: none;
    overflow: auto;
    margin: 5px;
    padding: 2px;
    box-shadow: 0 0 10px rgb(0,0,0);
}