.rfid-chekin-loader-default {
    border: 12px solid #f3f3f3; /* Light grey */
    border-top: 12px solid #3498db; /* Blue */
    border-radius: 50%;
    width: 16px;
    height: 16px;
    animation: spin 2s linear infinite;
}

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

.rfid-chekin-loader-stop {
    border: 12px solid #D42F0B; /* red */
    border-top: 12px solid #D42F0B; /* red */
    border-radius: 50%;
    width: 16px;
    height: 16px;
    animation: none;
}

.rfid-chekin-loader-ok {
    border: 12px solid #0BD411; /* green */
    border-top: 12px solid #0BD411; /* green */
    border-radius: 50%;
    width: 16px;
    height: 16px;
    animation: none
}

.rfid-chekin-loader-grey {
    border: 12px solid #c8c8c8; /*  grey */
    border-top: 12px solid #c8c8c8; /*  grey */
    border-radius: 50%;
    width: 16px;
    height: 16px;
    animation: none
}