Альтернатива text-decoration: underline
// HTML
<p class="pretty-text-underline">Pretty text underline without clipping descending letters.</p>
// CSS
.pretty-text-underline {
display: inline;
font-size: 1.25rem;
text-shadow: 1px 1px 0 #f5f6f9,
-1px 1px 0 #f5f6f9,
-1px -1px 0 #f5f6f9,
1px -1px 0 #f5f6f9;
background-image: linear-gradient(90deg, currentColor 100%, transparent 100%);
background-position: 0 1.04em;
background-repeat: repeat-x;
background-size: 1px 1px;
}
.pretty-text-underline::selection {
background-color: rgba(0, 150, 255, 0.3);
text-shadow: none;
}