body{
    background-color: #343a40;
    background-image: url("../img/bg-city.jpg");
    background-position: top center;
    background-repeat: no-repeat !important;
    background-attachment: fixed !important;
    background-size: cover;
    color: #ffffff;
    font-size: large;
}
.gridbg{
    background-image: url("../img/gridbg_glow.png");
    width: 100vw;
    height: 100vh;
}
.jumbotron{
    background-color: rgba(52, 58, 64, 0.80);
    background-image: url("../img/jumbotron.png");
    background-size: cover;
    background-position: center center;
    padding-top: 25px;
    padding-bottom: 25px;
}

.opaque90{
    background-color: rgba(52, 58, 64, 0.80);
}

h1{
    font-size: x-large;
    margin-top: 5px;
}
h2, h3{
    font-size: x-large;
    margin-top: 5px;
}
h1, h2, h3, h4, h5, h6{
    text-shadow:  0 2px 4px rgba(0, 0, 0, 0.4), 0 3px 10px rgba(0, 0, 0, 0.4);
}

.text-shadow{
    text-shadow:  0 2px 4px rgba(0, 0, 0, 0.4), 0 3px 10px rgba(0, 0, 0, 0.4);
}

.jumbotron .documents{
    position: absolute;
    top:0;
    right:0;
    margin-top: 25px;
    margin-right:  25px;
}
.jumbotron .audio{
    position: absolute;
    top:0;
    left:0;
    margin-top: 25px;
    margin-left:  25px;
}

/*.navbar{*/
    /*font-size: medium;*/
/*}*/

nav, .shadow, .jumbotron, .documents .btn, footer .btn{
    box-shadow: 0 2px 4px 0 rgba(0, 0, 0, 0.4), 0 3px 10px 0 rgba(0, 0, 0, 0.4);
}

.navbar-brand{
    border-radius: 25px;
    padding-left: 10px;
    padding-right: 10px;
    box-shadow: 0 2px 4px 0 rgba(0, 0, 0, 0.4);

    /*background: repeating-linear-gradient(*/
            /*135deg,*/
            /*transparent,*/
            /*transparent 4px,*/
            /*rgba(0, 0, 0, 0.1) 4px,*/
            /*rgba(0, 0, 0, 0.1) 8px*/
    /*);*/

    /*background: repeating-linear-gradient(*/
            /*135deg,*/
            /*transparent,*/
            /*transparent 2px,*/
            /*rgba(0, 0, 0, 0.2) 2px,*/
            /*rgba(0, 0, 0, 0.2) 3px*/
    /*);*/
}
.navbar-brand:hover{
    box-shadow: 0 2px 4px 0 rgba(0, 0, 0, 0.4), 0 3px 10px 0 rgba(0, 0, 0, 0.4);
    /*background: repeating-linear-gradient(*/
            /*135deg,*/
            /*transparent,*/
            /*transparent 4px,*/
            /*rgba(0, 0, 0, 0.4) 4px,*/
            /*rgba(0, 0, 0, 0.4) 5px*/
    /*);*/
    background: rgba(0,0,0,0.4);
}

nav .navbar-nav .nav-item{
    border-radius: 5px 5px 5px 0;
    margin-top: 0px;
    margin-right: 15px;
    padding-top: 0px;
    padding-bottom: 0px;
    padding-left: 25px;
    padding-right: 25px;
    box-shadow: 0 1px 2px 0 rgba(0, 0, 0, 0.4);

    /*background: repeating-linear-gradient(*/
        /*135deg,*/
        /*transparent,*/
        /*transparent 2px,*/
        /*rgba(0, 0, 0, 0.2) 2px,*/
        /*rgba(0, 0, 0, 0.2) 3px*/
    /*);*/
}
nav .navbar-nav .nav-item:hover{
    box-shadow: 0 2px 4px 0 rgba(0, 0, 0, 0.4), 0 3px 10px 0 rgba(0, 0, 0, 0.4);
    /*background: repeating-linear-gradient(*/
            /*135deg,*/
            /*transparent,*/
            /*transparent 4px,*/
            /*rgba(0, 0, 0, 0.4) 4px,*/
            /*rgba(0, 0, 0, 0.4) 5px*/
    /*);*/
    background: rgba(0,0,0,0.4);
}

main, aside{
    margin-bottom: 25px;
}
.nav .nav-item{
    margin-bottom: 15px;
}

footer{
    box-shadow: 0 -2px 4px 0 rgba(0, 0, 0, 0.4), 0 -3px 10px 0 rgba(0, 0, 0, 0.4);
}

.activity{
    height: 90px;
    padding-top: 50px;
    border-radius: 6px;
    box-shadow: 0 0 8px 0 rgba(0, 0, 0, 0.8);
    margin-bottom: 15px;
    filter: grayscale(50%);
}
.activity .btn{
    padding: 3px;
    background-color: rgba(108, 117, 125, 0.8);
    box-shadow: 0 2px 4px 0 rgba(0, 0, 0, 0.4);
}
.activity:hover{
    box-shadow: 0 0 8px 0 rgba(0, 0, 0, 0.8), 0 0 16px 0 rgba(0, 0, 0, 0.8);
    filter: grayscale(0%);
}

audio {
    width: 300px;
}