.caja_loader {
    position: fixed;
    display: flex;
    width: 100%;
    height: 100%;
    background: #8080804a;
    z-index: 99999999;
    justify-content: center;
    align-items: center;
}

.loader {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    display: inline-block;
    position: relative;
    border: 3px solid;
    border-color: #FFF #FFF transparent;
    box-sizing: border-box;
    animation: rotation 1s linear infinite;
}

.loader::after {
    content: '';
    box-sizing: border-box;
    position: absolute;
    left: 0;
    right: 0;
    top: 0;
    bottom: 0;
    margin: auto;
    border: 3px solid;
    border-color: transparent #FF3D00 #FF3D00;
    width: 24px;
    height: 24px;
    border-radius: 50%;
    animation: rotationBack 0.5s linear infinite;
    transform-origin: center center;
}

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

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

.font-em2 {
    font-size: 1.5em;
}