.loader-wrapper {
    align-items: center;
    display: flex;
    justify-content: center;
    height: 100vh;
    overflow: hidden;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 99999;
    background: rgba(0,0,0,0.65);
}

.loader {
    position: fixed;
    z-index: 3;
    margin: 0 auto;
    left: 0;
    right: 0;
    top: 50%;
    margin-top: -30px;
    width: 60px;
    height: 60px;
    list-style: none;
}

@-webkit-keyframes loadbars {
    0% {
        height: 10px;
        margin-top: 25px;
    }

    50% {
        height: 50px;
        margin-top: 0px;
    }

    100% {
        height: 10px;
        margin-top: 25px;
    }
}

.loader li {
    background: linear-gradient(to bottom, #b2fefa, #0ed2f7);
    width: 10px;
    height: 10px;
    float: right;
    margin-right: 5px;
    box-shadow: 0px 10px 10px rgba(0,0,0,0.2);
}

    .loader li:first-child {
        -webkit-animation: loadbars 0.6s cubic-bezier(0.645,0.045,0.355,1) infinite 0s;
    }

    .loader li:nth-child(2) {
        -webkit-animation: loadbars 0.6s ease-in-out infinite -0.2s;
    }

    .loader li:nth-child(3) {
        -webkit-animation: loadbars 0.6s ease-in-out infinite -0.4s;
    }