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

body {
    font-family: 'Bebas Neue';
    background: #000;
    color: #f00;
    line-height: 1.5;
    font-size: 18px;
}

h1 {
    font-size: 32px;
    color: #0f0;
}

h2 {
    font-size: 24px;
    color: #ff0;
}

h3 {
    font-size: 20px;
    color: #0ff;
}

h4 {
    font-size: 18px;
    color: #00f;
}

a {
    color: #fff;
    text-decoration: none;
    border-radius: 4px;
    background: #333;
    padding: 8px 16px;
    transition: all 0.3s;
}

a:hover {
    background: #666;
}

code {
    background: #333;
    color: #f00;
    padding: 2px 8px;
    border: 1px solid #777;
    border-radius: 4px;
    font-size: 14px;
    font-family: monospace;
}

pre {
    background: #333;
    border: 1px solid #777;
    border-radius: 4px;
    font-size: 18px;
    font-family: monospace;
}

img {
    display: none;
}

p {
    font-size: 16px;
}

img[src~"[.jpg"], img[src~"[.png"], img[src~"[.gif"], img[src~"[.svg"], img[src~"[.ico"] {
    width: 100px;
    height: 100px;
    border: 2px solid #000;
}

img[src~"[.mpg"], img[src~"[.mp4"], img[src~"[.mp3"] {
    display: none;
}

body::after {
    content: "";
    position: fixed;
    top: 0;
    right: 0;
    width: 100%;
    height: 100px;
    background: url("https://example.com/ void-pattern.png");
    background-size: 100px 100px;
    background-position: right bottom;
}

body::before {
    content: "";
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100px;
    background: url("https://example.com/void-pattern.png");
    background-size: 100px 100px;
    background-position: left top;
}