body {
    padding-top: 80px;
}

.spinner {
    position: absolute;
    left: 50%;
    height: 20px;
    width: 20px;
    -moz-animation: rotate 0.8s infinite linear;
    -o-animation: rotate 0.8s infinite linear;
    -webkit-animation: rotate 0.8s infinite linear;
    animation: rotate 0.8s infinite linear;
    border: 8px solid rgb(128, 128, 128);
    border-right-color: transparent;
    border-radius: 50%;
}

@-moz-keyframes rotate {
    0% {
        -moz-transform: rotate(0);
        -ms-transform: rotate(0);
        -o-transform: rotate(0);
        -webkit-transform: rotate(0);
        transform: rotate(0);
    }

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

@-webkit-keyframes rotate {
    0% {
        -moz-transform: rotate(0);
        -ms-transform: rotate(0);
        -o-transform: rotate(0);
        -webkit-transform: rotate(0);
        transform: rotate(0);
    }

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

@keyframes rotate {
    0% {
        -moz-transform: rotate(0);
        -ms-transform: rotate(0);
        -o-transform: rotate(0);
        -webkit-transform: rotate(0);
        transform: rotate(0);
    }

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