*{
	font-family:Arial
}
#gl-canvas {
	border:7px solid grey
}

.btn-circle {
    width: 30px;
    height: 30px;
    padding: 6px 0px;
    border-radius: 15px;
    text-align: center;
    font-size: 12px;
    line-height: 1.42857;
}
.btn-circle.btn-xl {
    width: 130px;
    height: 130px;
    padding: 10px 16px;
    border-radius: 35px;
    font-size: 24px;
    line-height: 1.33;
}

.overlay {
    position: absolute;
    display: block;
    width: 100%;
    height: 100%;
    top: 0;
    left: 0;
    background-color: rgba(0.5,0.5,0.5,0.2);
    z-index: 2;
    cursor: pointer;
}

#top-overlay {
    height: 30%;
    bottom: 30%;
}
#left-overlay {
    top: 30%;
    height: 40%;
    width: 50%;
    right: 50%;
}
#right-overlay {
    top: 30%;
    height: 40%;
    width: 50%;
    left: 50%;
}
#bottom-overlay {
    top: 70%;
    height: 30%;
}

.overlay-text {
    position: absolute;
    top: 50%;
    left: 50%;
    font-size: 20px;
    color: grey;
    transform: translate(-50%,-50%);
    -ms-transform: translate(-50%,-50%);
}