HTML:

<ol class="list-number-styled">
  <li>list item 1</li>
  <li>list item 2 list item 2 list item 2 list item 2 list item 2 list item 2 list item 2 list item 2 list item 2 list item 2 list item 2 list item 2 list item 2 list item 2 list item 2 list item 2</li>
  <li>list item 3</li>
</ol>

CSS:

.list-number-styled {
  counter-reset: list-number-styled;
  padding: 0 0 0 50px;
  margin: 0;
}

.list-number-styled > li {
  list-style-type: none;
  position: relative;
  counter-increment: list-number-styled;
  margin-bottom: 30px;
}

.list-number-styled > li:before {
  content: counter(list-number-styled, decimal);
  display: block;
  text-align: right;
  color: red;
  position: absolute;
  width: 40px;
  height: 20px;
  font-size: 18px;
  line-height: 18px;
  font-weight: bold;
  top: 3px;
  left: -60px;
  pointer-events: none;
}

Others options for counter: decimal, decimal-leading-zero, lower-roman, upper-roman, lower-greek, lower-latin, upper-latin, armenian, georgian, lower-alpha, upper-alpha

• list-style-type on developer.mozilla.org