Source
ol {
list-style: none;
counter-reset: steps;
}
ol li {
counter-increment: steps;
}
ol li::before {
content: counter(steps);
margin-right: 0.5rem;
background: #ff6f00;
color: white;
width: 1.2em;
height: 1.2em;
border-radius: 50%;
display: inline-grid;
place-items: center;
line-height: 1.2em;
}
ol ol li::before {
background: darkorchid;
}