nav ul {
    background: #000;
    font-size: 0;
    list-style: none;
    margin: 0px;
    padding: 0;
    text-align: center;
    width: 100%;
}
nav li {
    display: inline-block;
    margin: 10px;
    padding: 0px;
    position: relative;
    min-width: 20%;
}
nav a {
    background: #000;
    border: 0px solid #b7b6b6;
    color: #f8f8f8;
    /*color: #f8f8f8;*/
    /*color: #4393c3;*/
    display: block;
    font: bold 16px/25px sans-serif;
    padding: 0 5px;
    text-align: left;
    text-decoration: none;
    -webkit-transition: all .25s ease;
       -moz-transition: all .25s ease;
        -ms-transition: all .25s ease;
         -o-transition: all .25s ease;
            transition: all .25s ease;
}
nav .dropdown:after {
    content: ' \25bc';
}
  /*background: #2b6495;*/
nav li:hover a {
    background: #000;
    color: #f8f8f8;
    /*color: #92c5de;*/
}
nav li ul {
    left: 0;
    opacity: 0;
    position: absolute;
    top: 40px;
    width: 300px;
    visibility: hidden;
    z-index: 1;
    -webkit-transition: all .25s ease;
       -moz-transition: all .25s ease;
        -ms-transition: all .25s ease;
         -o-transition: all .25s ease;
            transition: all .25s ease;
}
nav li:hover ul {
    opacity: 1;
    top: 40px;
    visibility: visible;
}
nav li ul li {
    width: 90%;
}
nav li ul a:hover {
    /*background: #969696;*/
    background: #4393c3;
}