html, body {
    padding: 0;
    margin: 0;
    background: #fefefe;
    font-size: 18px;
    font-family: sans-serif;
    color: #223;
    line-height: 1.4;
}

header, main, footer {
    max-width: 662px;
    margin: 0 auto;
    padding: 0 0.8rem;
}
footer {
    border-top: solid 1px #d5d5d6;
    font-size: 0.8rem;
}

a {
    color: #03f;
    text-decoration: none;
}
a:hover {
    text-decoration: underline;
}

hr {
    height: 0;
    border: none;
    border-bottom: solid 1px #d5d5d6;
}

h1 {
    font-size: 1.5rem;
}
h2 {
    font-size: 1.25rem;
}
h3, h4, h5, h6 {
    font-size: 1rem;
}

img {
    display: block;
    max-width: 100%;
    margin: 1em auto;
}

ul, ol {
    padding-left: 1rem;
}

ul {
    list-style: square;
}

code {
    white-space: pre;
    display: block;
    overflow-x: auto;
    padding: 0.5em;
    margin: 0.5em 0;
    border: solid 1px #d5d5d6;
}

table {
    border-collapse: collapse;
    margin: 1.5rem 0;
    word-break: break-word;
}
table td, table th {
    border: 1px solid #d5d5d6;
    text-align: start;
    padding: 0.5rem;
}