<menu>
  <li>
    <a href="#">Home</a>
  </li>
  <li>
    <a href="#">About</a>
  </li>
  <li>
    <a href="#">Service</a>
  </li>
  <li>
    <a href="#">Contact</a>
  </li>
  <li></li>
  <li>
    <a href="#">Log in</a>
    <strong>⁝</strong>
    <a href="#">Sign up</a>
  </li>
</menu>

menu:has(a:hover) a:not(:hover) {
  opacity: 0.3;
}

a {
  text-decoration: none;
  transition: all 0.3s ease;
}

li {
  list-style-type: none;
}

menu {
  width: fit-content;
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 30px;
  margin: 20px auto 0;
  padding: 15px 30px;
  border-radius: 30px;
  box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);

  a {
    font-family: sans-serif;
    color: #222;
    font-weight: 600;
    font-size: 15px;
    text-transform: uppercase;
  }
}