div#spinner-bg {
    height: 100%;
    width: 100%;
    display: none;
    position: fixed;
    background: rgb(64,64,64);
    background: radial-gradient(circle, rgba(64,64,64,0.5746673669467788) 0%, rgba(0,0,0,1) 100%);
    z-index: 9999;
}

.spinner-icon {
    left: 50%;
    top: 50%;
    margin-left: -32px;
    margin-top: -32px;
    display: inline-block;
    position: relative;
    width: 64px;
    height: 64px;
}
.spinner-icon div {
    box-sizing: border-box;
    display: block;
    position: absolute;
    width: 51px;
    height: 51px;
    margin: 6px;
    border: 6px solid #fff;
    border-radius: 50%;
    animation: spinner-icon 1.2s cubic-bezier(0.5, 0, 0.5, 1) infinite;
    border-color: #fff transparent transparent transparent;
}
.spinner-icon div:nth-child(1) {
    animation-delay: -0.45s;
}
.spinner-icon div:nth-child(2) {
    animation-delay: -0.3s;
}
.spinner-icon div:nth-child(3) {
    animation-delay: -0.15s;
}
@keyframes spinner-icon {
    0% {
        transform: rotate(0deg);
    }
    100% {
        transform: rotate(360deg);
    }
}