.circle-top {
    position: absolute;
    top: -33%;
    left: -14%;
    border: 120px solid #0b2947;
    height: 700px;
    width: 700px;
    display: block;
    background: 0 0;
    border-radius: 100%;
    z-index: 1;
}
.circle-bottom {
    position: absolute;
    bottom: -4%;
    right: 1%;
    height: 450px;
    width: 450px;
    display: block;
    background: 0 0;
    z-index: 1;
    opacity: .5;
}