<style>
@media(max-width: 1000px){
    #main-nav {
         margin-top:105px;
         margin-left: 300px
         display: inline-table
    }

    #main-nav a{
         font-weight: bolder;
         display: table-cell;
         text-align: center;
         width: 95px;
         height: 35px;
         line-height: 35px;
         text-decoration: none;
         color: #a0a0a0;
         text-transform: uppercase;
         font-size: 0.7em;
    }
}
@media(min-width: 1001px){
    #main-nav {
         margin-top:105px;
         margin-left: 300px
         display: block;
     }

    #main-nav a{
         font-weight: bolder;
         display: block;
         float-left;
         text-align: center;
         width: 95px;
         height: 35px;
         line-height: 35px;
         text-decoration: none;
         color: #a0a0a0;
         text-transform: uppercase;
         font-size: 0.7em;
    }
}
</style>