<h3 class="hover-4">4. Hover Me</h3>
.hover-4 {
  --c: #1095c1;
  line-height: 1.2em;
  background: conic-gradient(from -135deg at 100% 50%, var(--c) 90deg, #0000 0)
      0 var(--p, 0%),
    conic-gradient(from -135deg at 1.2em 50%, #0000 90deg, var(--c) 0) 100%
      var(--p, 0%);
  background-size: var(--s, 0%) 200%;
  background-repeat: no-repeat;
  transition: 0.4s ease-in, background-position 0s;
}
.hover-4:hover {
  --p: 100%;
  --s: calc(
    50% + 0.61em
  ); /* it should be 0.6em(1.2em/2) but we use a litte bigger */
  color: #fff;
}

body {
  height: 100vh;
  margin: 0;
  display: grid;
  grid-template-columns: auto auto;
  gap: 20px;
  place-content: center;
}
h3 {
  font-family: system-ui, sans-serif;
  font-size: 3rem;
  margin: 0;
  cursor: pointer;
  padding: 0 0.07em;
}

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