body, html {
    background: url("../images/pero-kalimero-9BJRGlqoIUk-unsplash.jpg") no-repeat center center fixed;
    -webkit-background-size: cover;
    -moz-background-size: cover;
    -o-background-size: cover;
    height: 100%;
    background-size: cover;
}
.loader {
    font-size: 10px;
    margin: 50px auto;
    text-indent: -9999em;
    width: 11em;
    height: 11em;
    border-radius: 50%;
    background: #ffffff;
    background: -moz-linear-gradient(left, #ffffff 10%, rgba(255, 255, 255, 0) 42%);
    background: -webkit-linear-gradient(left, #ffffff 10%, rgba(255, 255, 255, 0) 42%);
    background: -o-linear-gradient(left, #ffffff 10%, rgba(255, 255, 255, 0) 42%);
    background: -ms-linear-gradient(left, #ffffff 10%, rgba(255, 255, 255, 0) 42%);
    background: linear-gradient(to right, #ffffff 10%, rgba(255, 255, 255, 0) 42%);
    position: relative;
    -webkit-animation: load3 1.4s infinite linear;
    animation: load3 1.4s infinite linear;
    -webkit-transform: translateZ(0);
    -ms-transform: translateZ(0);
    transform: translateZ(0);
}

    .loader:before {
        width: 50%;
        height: 50%;
        background: #ffffff;
        border-radius: 100% 0 0 0;
        position: absolute;
        top: 0;
        left: 0;
        content: '';
    }

    .loader:after {
        background: #94e3fe;
        width: 75%;
        height: 75%;
        border-radius: 50%;
        content: '';
        margin: auto;
        position: absolute;
        top: 0;
        left: 0;
        bottom: 0;
        right: 0;
    }

@-webkit-keyframes load3 {
    0% {
        -webkit-transform: rotate(0deg);
        transform: rotate(0deg);
    }

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

@keyframes load3 {
    0% {
        -webkit-transform: rotate(0deg);
        transform: rotate(0deg);
    }

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