.loading {
    position: fixed;
    left: 0;
    top: 0;
    background-color: rgba(135, 190, 68, 0.7);
    z-index: 10000;
    width: 0;
    height: 0;
    overflow: hidden;
    opacity: 0;
    visibility: hidden;
    transition: opacity 300ms;
}

.loading__circle {
    display: inline-block;
    position: absolute;
    width: 140px;
    height: 140px;
    left: calc(50% - 40px);
    top: calc(50% - 40px);
}

.loading__circle:after {
    content: " ";
    display: block;
    width: 100px;
    height: 100px;
    margin: 10px;
    border-radius: 50%;
    border: 10px solid #fff;
    border-color: #fff transparent #fff transparent;
    animation: loading 1.2s linear infinite;
    opacity: 0.8;
}

.loading.show {
    width: 100%;
    height: 100%;
    visibility: visible;
    opacity: 1;
}

@keyframes loading {
    0% {
        transform: rotate(0deg);
    }
    100% {
        transform: rotate(360deg);
    }
}