.button-container {
    padding: 0 40px;
}

.page-content {
    background: #3E3E3E;
}

.previous-page-button {
    top: 50%;
    left: 7%;
    position: fixed;
}

.next-page-button {
    top: 50%;
    right: 7%;
    position: fixed;
}

.left {
    float: left;
}

#viewer-toolbar-pagination {
    margin-left: 25%;
}

#viewer-pagenumber-input {
    width: 30px;
}