#wrapper {
    height: auto;
    /* border-top: 3px solid #000;
    border-bottom: 3px solid #000; */
    padding: 2em;
    margin-top: 2em;
    font-family: 'Poppins', sans-serif;
}

#vertical_nav {
    width: 15%;
    height: 100%;
    float: left;
    top: 0;
    bottom: 0;
}

#maincontent {
    margin-left: 15%;
    width: 80%;
    border-left: 3px solid #000;
    padding-left: 2.5em;
    padding-right: 1em;

}

ul {
    list-style-type: none;
}

#page_nav {
    width: auto;
    height: auto;
    margin: 1em auto;
    margin-left: 47%;
    padding-bottom: 2em;
    text-align: center;
}

.page_nav_square {
    width: 50px;
    height: 50px;
    border: solid 1px #000;
    float: left;
    text-align: center;
    padding: 15px 0;
}

.active_page {
    background-color: rgb(225, 225, 225);
}

.page_nav_square img {
    width: 25px;
    height: 25px;
}

img.thumbnail {
    height: 700px;
    width: 700px;
    transition: all .2s ease-in-out;
    border-radius: 5px;
    cursor: pointer;
}

.thumbnail div {
    position: absolute;
    bottom: 0;
    background: black;
    color: white;
    margin-bottom: 5px;
    font-family: sans-serif;
    opacity: 0;
    visibility: hidden;
    -webkit-transition: visibility 0s, opacity 0.5s linear;
    transition: visibility 0s, opacity 0.5s linear;
}

img.thumbnail:hover {
    transform: scale(1.2);
    opacity: 0.7;
}

.thumbnail:hover div {
    width: 150px;
    padding: 8px 15px;
    visibility: visible;
    opacity: 0.7;
}