section.main::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    width: 100%;
    height: 100%;
    background: -webkit-gradient(linear, left top, right top, from(#273c92), to(#293e92));
    background: linear-gradient(to right, #273c92, #293e92);
    -webkit-box-shadow: 1px 0 7px 0 rgba(0, 0, 0, .5);
    box-shadow: 1px 0 7px 0 rgba(0, 0, 0, .5);
}
section.main::after {
    background: url(../images/bg-effect.png) center;
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    width: 100%;
    height: 300px;
    background-size: cover;
    opacity: .1;
}
header .main-logo {
    position: absolute;
    height: 13vh;
    top: 15vh;
    z-index: 1;
    background-color: #fff;
    border-radius: 2px;
}