@media screen and (min-width:1366px) {
  
    #slide2{
        font-size: 1.1em;
        overflow: hidden;
        height: 850px;
        padding-top: 3%;
    }
    #slide3 .mach_conv{
          height: 850px;
          padding-top: 3%;
   }
  .invisible{
  	display:none;
  }
  .img_hist{
  	width:65%;
  }
  #slide_centrale2 .td_domaines {
        font-size: 80%;
    }
    #slide_centrale2 .couleur {
        font-size: 80%;
    }
  #t_slide1{
  	height: 820px;
  }
  #t_slide3{
  	height: 820px;
  }
 
}

@media screen and (min-device-width:1920px) {
    #slide2{
        font-size: 1.1em;
        height: 800px;
        padding-top: 3%;
    }
    #slide3 .mach_conv{
        height: 800px;
        padding-top: 3%;
    }

     .button_contact {
        padding: 1%;
        position: fixed;
        bottom: 83%;
        left: 95%;
    }
     .button_contact img{
        width:4em;
        margin-top:7%;
     }
    .in li{
        font-size: 1em; 
        padding-left: 7%;
    }
      .in a{
        font-size: 1.5em;
        padding-left:1%;
      }
  #t_slide1{
  	height: 820px;
  }
  #t_slide3{
  	height: 820px;
  }
  .mach_conv ul {
    border: 1px solid rgba(194, 194, 194, 0.548);
    padding: 1%;
    width: 50%;
    height:10%;
    margin: auto;
    background-color: rgba(194, 194, 194, 0.507);
}
} 

@media (min-width:800px){
    .header{display:none}
    nav {
        position: fixed; 
        top: 0;
        z-index: 1;
        display: block;
        width: 230%;
        height: 50px;
        font-size: 1rem;
        background-image: linear-gradient(180deg, #444444, rgba(100, 100, 100, 0.4), transparent);
    }
  .mob_eng{
  		display :none;
 	}
  #slide2{
  	font-size:1.1em;
  }
}

@media (min-device-width:780){
  .mob_eng{
  		display :none;
 	}
    nav {
        min-width: 777px;;
        max-width: 8000px;
        position: fixed; 
        top: 0;
        z-index: 1;
        display: block;
        width: 230%;
        height: 50px;
        font-size: 1rem;
        background-image: linear-gradient(180deg, #444444, rgba(100, 100, 100, 0.4), transparent);
    }    
  #slide2{
  	font-size:1.1em;
  }
}