*,
*::after,
*::before {
    box-sizing: border-box;
}

html,
body {
    margin: 0;
    padding: 0;
}

body {
    font-family: 'Courier New', Courier, monospace;
}

h1 {
    text-align: center;
    font-size: 1.75em;
    margin-bottom: 30px;
}

h1::before {
    content: 'w ';
    font-size: 0.75em;
    color: #666;
    display: inline-block;
    width: 30px;
}

h2,
h3 {
    margin-top: 60px;
}

h2,
p {
    padding-left: 30px;
    padding-right: 30px;
}

code {
    border: #666 solid 1px;
    background-color: #eee;
    padding: 0 5px;
    border-radius: 5px;
}

pre {
    margin: 30px 0;
    color: #eee;
    background-color: #333;
    font-family: 'Courier New', Courier, monospace;
    padding: 30px;
    overflow-x: auto;
    position: relative;
}

pre::after {
    content: '.w';
    position: absolute;
    top: 0;
    left: 0;
    color: #333;
    background-color: #fff;
    padding: 0 5px;
    border-radius: 0 0 5px 0;
}

.menu {
    text-align: center;
    padding: 30px 0;
    margin-bottom: 60px;
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.5);
}

.logo {
    font-size: 64px;
    font-family: 'Times New Roman', Times, serif;
    line-height: 1;
}

.container {
    max-width: 640px;
    margin: 0 auto;
    padding-top: 0;
    position: relative;
}

.footer {
    border-top: 1px dashed #ccc;
    margin-top: 60px;
    padding: 60px 15px;
    text-align: center;
}

@media screen and (min-width: 600px) {
    h1,
    h2,
    h3 {
        text-align: left;
    }

    .menu {
        text-align: left;
        width: 200px;
        padding-top: 30px;
        position: fixed;
        top: 0;
        left: calc(50% - 320px);
        box-shadow: none;
    }

    .logo {
        font-size: 128px;
    }

    .container {
        padding-top: 30px;
        min-height: 500px;
        padding-left: 230px;
    }
}