/*** ADS: ***/
.skyscrapers{width:1500px;margin:auto;position:sticky;top:0;}
.skyscraper{display:none;width:120px;height:600px;box-shadow: 2px 2px 10px #000;margin-top:2em;}

@media only screen and (min-width: 1250px) 
{
    .skyscrapers{width:1200px;}
    .skyscraper{width:120px;display:inline-block;}
}

@media only screen and (min-width: 1400px) 
{
    .skyscrapers{width:1350px;}
    .skyscraper{width:160px;}
}

@media only screen and (min-width: 1600px) 
{
    .skyscrapers{width:1550px;}
    .skyscraper{width:300px;}
}