.bg-element {
    height: 100%;
    width: 100%;
    top: 0;
    left: 0;
    position: absolute;
    background-image: url(https://agonlifting.com/wp-content/uploads/AGON-BG-01.png);
    background-position: center center;
    background-repeat: no-repeat;
    background-size: cover;
    opacity: 0.05;
    transition: background 0.3s, border-radius 0.3s, opacity 0.3s;
    z-index: 0;
}
.logo-element img {
    max-width: 160px;
    height: auto;
    margin: 15px;
    position: relative;
    z-index: 200;
}
.thumbnail,
.input-group-addon,
.input-group-btn:last-child > .btn {
    border-radius: 0;
}