.column {
    float: left;
    width: 25%;
    padding: 10px;
}

/* Style the images inside the grid */
.column img {
    opacity: 0.8; 
    cursor: pointer; 
}

.column img:hover {
    opacity: 1;
}

/* Clear floats after the columns */
.row:after {
    content: "";
    display: table;
    clear: both;
}

/* The expanding image container */


/* Expanding image text */
#imgtext {
    position: absolute;
    bottom: 15px;
    left: 15px;
    color: black;
    font-size: 20px;
}

/* Closable button inside the expanded image */
.closebtn {
    position: absolute;
    top: 10px;
    right: 15px;
    color:white;
    font-size: 35px;
    cursor: pointer;
    
}
.nav-pills>li.active>a, .nav-pills>li.active>a:hover, .nav-pills>li.active>a:focus{
    background-color: #1b1464;
    color: yellow;
}
a, a:link, a:visited, a:hover, a:active{
    color: white;
}
#ttab{
        box-shadow: 0 14px 28px rgba(0, 0, 0, 0.25), 0 10px 10px rgba(0, 0, 0, 0.22);
    border-radius: 5px;
}