.waves-button-input{
    color: white !important;
}
.spanner {
    position: absolute;
    top: 50%;
    left: 0;
    background: #2a2a2a55;
    width: 100%;
    display: block;
    text-align: center;
    height: 100%;
    color: #FFF;
    transform: translateY(-50%);
    z-index: 1000;
    visibility: hidden;
}

.overlay {
    position: fixed;
    width: 100%;
    height: 100%;
    background: rgba(212, 210, 210, 0.5);
    visibility: hidden;
}

.show {
    visibility: visible;
}

.spanner, .overlay {
    opacity: 0;
    -webkit-transition: all 0.3s;
    -moz-transition: all 0.3s;
    transition: all 0.3s;
}

.spanner.show, .overlay.show {
    opacity: 1
}

.indeterminate {
    position: relative;
    width: 30%;
    height: 100%;
}

.indeterminate:before {
    content: '';
    position: absolute;
    height: 100%;
    background-color: #f9f9f9;
    animation: indeterminate_first 1.5s infinite ease-out;
}

.indeterminate:after {
    content: '';
    position: absolute;
    height: 100%;
    background-color: #f9f9f9;
    animation: indeterminate_second 1.5s infinite ease-in;
}

@keyframes indeterminate_first {
    0% {
        left: -100%;
        width: 100%;
    }
    100% {
        left: 100%;
        width: 10%;
    }
}

@keyframes indeterminate_second {
    0% {
        left: -150%;
        width: 100%;
    }
    100% {
        left: 100%;
        width: 10%;
    }
}