@keyframes add-border {
  from {
    border-bottom-color: transparent;
  }
  to {
    border-bottom: var(--grey-800);
  }
}

#site-header {

  z-index: 900;
  --gap: 3ch;

  width: 100vw;
  height: var(--header-h);
  background-color: var(--color-bg);
  padding: 0 var(--padding-body);

  .site-header__inner{
    width: 100%;
    height: 100%;

    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--gap);
  }


  a{
    text-decoration: none;
    &:hover{
      color: var(--grey-200);
    }
  }


  #site-title {
    flex-grow: 2;
    svg{
      width: 100px;
      @media #{$small}{
        width: 80px;
      }
    }
  }

  .title-page{
    display: none;
    flex-grow: 2;
    text-align: left;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    text-transform: uppercase;
    font-size: var(--fs-small);
    line-height: 2;
   
  }

  ul{
    list-style-type: none;
    display: flex;
    align-items: center;
    gap: var(--gap); 
    text-transform: uppercase;
  }


  #theme-toggle{
    width: var(--h-block);
    height: var(--h-block);
    display: flex;
    align-items: center;
    justify-content: center;
    svg{
      width: 18px;
      position: relative;
      top: -2px;
    
    }
  }

  #lang-toggle{
    display: flex;
    gap: 1ch;
    button:disabled{ color: var(--color-txt-light); }
  }

  #menu-toggle{
    cursor: pointer;
    svg{
      width: 30px;
    }
    .close{ display: none; }
  
  }

  button{
    
    &:hover{
      svg{ fill: var(--grey-200)!important; }
    }
  }

}


#site-header.is-visible{
  position: fixed;
  top: 0;

  .site-header__inner{
    border-bottom: var(--border-light);

    #nav-highlight li:not(.soutenir){
      display: none;
    }
    #site-title {
      @media #{$small-up}{
      flex-grow: 0;
      width: calc((100vw - var(--max-w-content))/2 - var(--padding-body)*2);
      } 
      @media #{$medium}{
        width: calc(var(--banner-medium) - var(--padding-body));
      } 
    } 
    
    .title-page{
      @media #{$small-up}{
       display: block;
      }
      flex-grow: 2;
    }
  }

  & ~ main{
    margin-top: var(--header-h);
  }
}


@media #{$medium}{
  #nav-highlight{
    display: none;
  }
}