*{
    margin: 0;
    padding: 0;
  }
  
  .main-header{
    height: 80px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    background-color: white;
    padding: 0 0.4rem;
  }
  
  .main-logo{
    width: 150px;
    margin-top:10px;
    margin-left: 20px;
  }
  
  .main-nav{
    position: fixed;
    top: 0;
    left: 0;
    height: 100vh;
    width: 100%;
    margin-left: -100%;
    transition: all .2s linear;
    background-color: rgba(0,0,0,.7);
    z-index: 100;
  }
  
  .main-nav.show{
    margin-left: 0;
  }
  
  .nav-links{
    background-color: rgb(250,250,250);
    display: flex;
    flex-direction: column;
    width: 70%;
    height: 100%;
    align-items: center;
    justify-content: flex-start;
  }
  
  .link-item{
    margin-top: 2rem;
    color: #444444;
    text-decoration: none;
    font-weight: bold;
    position: relative;
  }
  
  .link-item::after {
    position: absolute;
    content: "";
    background-color: black;
    bottom: -5px;
    left: 0;
    width: 0%;
    height: 3px;
    transition: 0.3s ease all;
  }
  
  .link-item:hover::after {
    width: 100%;
  }
  
  .button-menu{
    z-index: 200;
    width: 40px;
    height: 40px;
    border: none;
    display: flex;
    background: none;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    cursor: pointer;
  }
  
  .button-menu span{
    width: 37px;
    height: 4px;
    margin-bottom: 5px;
    position: relative;
    background: #444444;
    border-radius: 3px;
    transform-origin: 4px 0px;
    transition: all .2s linear;
  }
  
  .button-menu.close span {
    opacity: 1;
    transform: rotate(45deg) translate(0px, 0px);
    background: #ffffff;
  }
  
  .button-menu.close span:nth-child(2){
    transform: rotate(-45deg) translate(-8px, 5px);
  }
  
  .button-menu.close span:nth-child(3){
    display: none;
  }
  
  
  @media screen and (min-width:768px) {
    .button-menu{
      display: none;
    }
  
    .main-logo{
      flex-basis: 30%;
      width: 160px;
     
    }
  
.contenedor-header {
  width: 90%;
  margin: 0 auto;
}
   
    .main-nav{
      position: static;
      margin-left: 0;
      flex-basis: 70%;
      height: 100%;
    }
  
    .nav-links{
      width: 100%;
      flex-direction: row;
      flex-wrap: wrap;
      align-items: center;
      justify-content: flex-end;
      background: white;
    }
  
    .link-item{
      display: inline-block;
      margin-top: 0;
      margin-right: 2rem;
    }
  }