#preloader {
    position: fixed;
    width: 100%;
    height: 100%;
    background: black;
    z-index: 99999;
    opacity: 0.5;
    display: none;
}

    #preloader .lds-roller {
        position: absolute;
        top: 50%;
        left: 50%;
        margin-left: -32px;
    }

.lds-roller {
    display: inline-block;
    position: relative;
    width: 64px;
    height: 64px;
}

    .lds-roller div {
        animation: lds-roller 1.2s cubic-bezier(0.5, 0, 0.5, 1) infinite;
        transform-origin: 32px 32px;
    }

        .lds-roller div:after {
            content: " ";
            display: block;
            position: absolute;
            width: 6px;
            height: 6px;
            border-radius: 50%;
            background: #fff;
            margin: -3px 0 0 -3px;
        }

        .lds-roller div:nth-child(1) {
            animation-delay: -0.036s;
        }

            .lds-roller div:nth-child(1):after {
                top: 50px;
                left: 50px;
            }

        .lds-roller div:nth-child(2) {
            animation-delay: -0.072s;
        }

            .lds-roller div:nth-child(2):after {
                top: 54px;
                left: 45px;
            }

        .lds-roller div:nth-child(3) {
            animation-delay: -0.108s;
        }

            .lds-roller div:nth-child(3):after {
                top: 57px;
                left: 39px;
            }

        .lds-roller div:nth-child(4) {
            animation-delay: -0.144s;
        }

            .lds-roller div:nth-child(4):after {
                top: 58px;
                left: 32px;
            }

        .lds-roller div:nth-child(5) {
            animation-delay: -0.18s;
        }

            .lds-roller div:nth-child(5):after {
                top: 57px;
                left: 25px;
            }

        .lds-roller div:nth-child(6) {
            animation-delay: -0.216s;
        }

            .lds-roller div:nth-child(6):after {
                top: 54px;
                left: 19px;
            }

        .lds-roller div:nth-child(7) {
            animation-delay: -0.252s;
        }

            .lds-roller div:nth-child(7):after {
                top: 50px;
                left: 14px;
            }

        .lds-roller div:nth-child(8) {
            animation-delay: -0.288s;
        }

            .lds-roller div:nth-child(8):after {
                top: 45px;
                left: 10px;
            }

@keyframes lds-roller {
    0% {
        transform: rotate(0deg);
    }

    100% {
        transform: rotate(360deg);
    }
}