@media screen and (max-width: 480px) {
  html {
    font-size: 0.8rem;
  }
  header .container-fluid {
    background: #272727;
  }
  .navbar{
    width:95%;
  }
  .nav-item {
    margin: 0.5em 0;
  }
  .buttons {
    flex-direction: column;
  }
  .section-2 img {
    width: 100%;
  }
  .section-2 .panel-about {
    position: initial;
    background: #fff;
    padding: 8em 4em 6em;
    box-shadow: 0px 0px 0px 0px rgba(0, 0, 0, 0);
  }
  footer .container{
    padding: 8em 0;
  }
  footer .col-md-6{
    padding: 1em;
  }
  footer .links li {
    padding: 0.8em 0;
  }
}
@media screen and (max-width: 991px) {
  header .container-fluid {
    background: #272727;
  }
  .navbar{
    width:95%;
  }
  .nav-item {
    margin: 0.5em 0;
  }
  .section-2 .panel-about {
    position: initial;
    background: #fff;
    padding: 8em 4em 6em;
    box-shadow: 0px 0px 0px 0px rgba(0, 0, 0, 0);
  }
  footer .container{
    padding: 8em 0;
  }
  footer .col-md-6{
    padding: 1em;
  }
  footer .links li {
    padding: 0.8em 0;
  }
}