* {
    margin: 0;
    padding: 0; 
  }
  
  /* Icon 1 */
  
.circle-under-x {
    position: relative;
}

@media only screen and (max-width: 768px) {
  .circle-under-x {
    margin: -9px 14px 0px 3px;
    transform: scale(0.6);
  }
}
@media only screen and (min-width: 768px) {
  .circle-under-x {
    margin: -8px 14px 0px 14px;
    transform: scale(0.8);
  }
}
@media only screen and (min-width: 1200px) {
  .circle-under-x {
    margin: -4px 14px 0px 14px;
    transform: scale(1);
  }
}
  #nav-icon {
    background-color: transparent;
    width: 14px;
    height: 12px;
    position: relative;
    /* margin: 50px auto; */
    -webkit-transform: rotate(0deg);
    -moz-transform: rotate(0deg);
    -o-transform: rotate(0deg);
    transform: rotate(0deg);
    -webkit-transition: .5s ease-in-out;
    -moz-transition: .5s ease-in-out;
    -o-transition: .5s ease-in-out;
    transition: .5s ease-in-out;
    cursor: pointer;
  }
  
  #nav-icon span {
    display: block;
    position: absolute;
    height: 2px;
    width: 100%;
    background: white;
    border-radius: 5px;
    opacity: 1;
    left: 0;
    -webkit-transform: rotate(0deg);
    -moz-transform: rotate(0deg);
    -o-transform: rotate(0deg);
    transform: rotate(0deg);
    -webkit-transition: .25s ease-in-out;
    -moz-transition: .25s ease-in-out;
    -o-transition: .25s ease-in-out;
    transition: .25s ease-in-out;
  }
  
  /* Icon 3 */
  
  #nav-icon span:nth-child(1) {
    top: 0px;
  }
  
  #nav-icon span:nth-child(2),#nav-icon span:nth-child(3) {
    top: 5px;
  }
  
  #nav-icon span:nth-child(4) {
    top: 10px;
  }
  
  #nav-icon.open span:nth-child(1) {
    top: 14px;
    width: 0%;
    left: 50%;
  }
  
  #nav-icon.open span:nth-child(2) {
    -webkit-transform: rotate(45deg);
    -moz-transform: rotate(45deg);
    -o-transform: rotate(45deg);
    transform: rotate(45deg);
  }
  
  #nav-icon.open span:nth-child(3) {
    -webkit-transform: rotate(-45deg);
    -moz-transform: rotate(-45deg);
    -o-transform: rotate(-45deg);
    transform: rotate(-45deg);
  }
  
  #nav-icon.open span:nth-child(4) {
    top: 14px;
    width: 0%;
    left: 50%;
  }