<nav class="radikalwp-nv-dot"><a href="#">کارها<//a><a href="#" class="radikalwp-nv-dot-on">درباره<//a><a href="#">تماس<//a><//nav>

.radikalwp-nv-dot { display: flex; gap: 8px; }
.radikalwp-nv-dot a {
  position: relative;
  padding: 9px 20px;
  font-size: 13.5px;
  font-weight: 700;
  color: #64748b;
  text-decoration: none;
  transition: color .25s ease;
  z-index: 1;
}
.radikalwp-nv-dot a::before {
  content: '';
  position: absolute;
  top: 50%;
  right: 50%;
  width: 0;
  height: 0;
  background: #c7d2fe;
  border-radius: 50%;
  transform: translate(50%, -50%);
  transition: all .3s cubic-bezier(.4, 1.4, .6, 1);
  z-index: -1;
}
.radikalwp-nv-dot a:hover { color: #0f172a; }
.radikalwp-nv-dot a:hover::before { width: 34px; height: 34px; }
.radikalwp-nv-dot-on { color: #0f172a !important; }
.radikalwp-nv-dot-on::before { width: 34px; height: 34px; background: #a5b4fc !important; }