I want to use the Font Awesome icon "file-lines". The link of the desired icon is this: https://fontawesome.com/icons/file-lines?f=classic&s=regular. The problem is that the unicode of this the solid version is the same of the regular version! https://fontawesome.com/icons/file-lines?f=classic&s=solid
f15c
How can I choose the regular version in the css?
Edit: this topic is not duplicated. I searched it for this. And both icons are free: https://fontawesome.com/search?q=file%20lines&o=r&m=free
.menu-nav a::before {
font-size: 16px;
line-height: 0;
content: '\f15c';
font-family: 'FontAwesome';
padding-right: 8px;
font-weight: 400;
}<div class="menu-nav">
<a href="">Link 01</a>
</div>