.drop-container {
    height: 50px;
    line-height: 50px;
    text-align: center;
    font-size: 12px;
}

.drop-container .loading i {
    position: relative;
    top: 6px;
    right: 6px;
    display: inline-block;
    width: 15px;
    height: 15px;
    border: 2px solid #666;
    border-radius: 50%;
    border-bottom-color: transparent;
    -webkit-animation: rotate 0.75s linear infinite;
    animation: rotate 0.75s linear infinite;
}
@-webkit-keyframes rotate {
    0% {
        -webkit-transform: rotate(0deg);
    }
    50% {
        -webkit-transform: rotate(180deg);
    }
    100% {
        -webkit-transform: rotate(360deg);
    }
}
@keyframes rotate {
    0% {
        transform: rotate(0deg);
    }
    50% {
        transform: rotate(180deg);
    }
    100% {
        transform: rotate(360deg);
    }
}