CSS: Ordered list with big red circular numbers. Derived from http://patternlab.io/css/style.css

big-red-ordered-list.css

ol {
    list-style: none;
    margin: 0;
    padding: 0;
    counter-reset: big-num;
}

ol li {
    counter-increment: big-num;
    position: relative;
    padding-left: 3.6em;
}

ol li:before {
    content: counter(big-num);
    background: rgba(255, 0, 0, 1);
    color: #fff;
    padding: 0 0.5em;
    border-radius: 2em;
    position: absolute;
    top: 0.2em;
    left: 0;
    font-size: 1.5em;
    line-height: 2;
    min-width: 1.0em;
    text-align: center;
}

ol>li::after {
    content: "\00a0";
    display: block;
    clear: both;
    visibility: hidden;
    line-height: 0;
    height: 0
}