.nav-link {
      position: relative;
      transition: color 0.3s ease;
      padding-bottom: 4px;
    }
    .nav-link::after {
      content: "";
      position: absolute;
      left: 0;
      bottom: 0;
      width: 0%;
      height: 2px;
      background-color: #3b82f6;
      transition: width 0.3s ease;
    }
    .nav-link:hover::after {
      width: 100%;
    }
    .nav-link:hover {
      color: #3b82f6;
    }