*{
    margin: 0;
    padding: 0;
    -webkit-box-sizing: border-box;
    -moz-box-sizing: border-box;
    box-sizing: border-box;
}
body{
    background: #081323;
}
.navegacion{
    position: fixed;
    background-image: url(../images/pixelblue.bmp);
    background-size: 180px;
    background-repeat: no-repeat;
    background-position: 10px 10px;
    width: 100%;
    margin: 10px auto;
    float: center;
    top: 0px;
    background-color: #1D2736;
    box-sizing: border-box; 
    opacity: 0.85;
}
.navegacion ul{
    list-style: none;
    text-align: center;
}
.menu > li{
    /*position: relative;*/
    display: inline-block; 
    margin: 0 auto;
}
.menu > li > a {
    display: block;
    padding: 15px 20px;
    color: #fff;
    font-family: 'Open sans';
    font-size:15px;
    text-decoration: none;
}
.menu li a:hover{
    /*color: #CE7D35;*/
    color: greenyellow;
    transition: all .3s;
    font-size: 15px;
}
/* Submenu */
.submenu{
    position: absolute;
    /* background: #333333;*/
    background: #081323;
    width: 280px;
    visibility: hidden;
    opacity: 0;
    transition: opacity 2.0s; 
}
.submenu li a{
    display: block;
    padding: 15px;
    color: #fff;
    font-family: 'Open sans';
    font-size:14px;
    text-decoration: none;
    text-align: left;
}
.menu li:hover .submenu{
    visibility: visible;
    opacity: 1;
}

@media screen and (max-width:500px){
    .navegacion{
        position: initial;
        opacity: 0.85;
        width: 100%;
        background-image: none;
    }
    .navegacion ul{
        text-align: left;
    }
}

@media screen and (max-width:1036px){
    .navegacion{
        background-image: none;
    }
}