.loader {
    display: flex;
    background: #000;
    height: 100%;
    width: 100%;   
    position: absolute;
    z-index: 3;
}

.loader-container {
    position: relative;
    width: 180px;
    height: 180px;
    margin: auto;
}

.loader-container .loader-medium {
    position: absolute;
    top: 50%;
    left: 50%;
    width: 100%;
    height: 100%;
    border: solid 4px transparent;
    border-top-color: #346991;
    border-left-color: #346991;
    border-radius: 50%;
    animation: loader-medium 2s linear infinite;
}

@keyframes loader-medium {
    0% {
        transform: translate(-50%, -50%) rotate(0deg);
    }
    100% {
        transform: translate(-50%, -50%) rotate(360deg);
    }
}

.loader-container .loader-small {
    position: absolute;
    top: 50%;
    left: 50%;
    width: 70%;
    height: 70%;
    border: solid 4px transparent;
    border-top-color: #346991;
    border-left-color: #346991;
    border-radius: 50%;
    animation: loader-small 1.5s linear infinite;
}

@keyframes loader-small {
    0% {
        transform: translate(-50%, -50%) rotate(0deg);
    }
    100% {
        transform: translate(-50%, -50%) rotate(-360deg);
    }
}

.loader-container .loader-smaller {
    position: absolute;
    top: 50%;
    left: 50%;
    width: 40%;
    height: 40%;
    border: solid 4px transparent;
    border-top-color: #346991;
    border-left-color: #346991;
    border-radius: 50%;
    animation: loader-smaller 1s linear infinite;
}

@keyframes loader-smaller {
    0% {
        transform: translate(-50%, -50%) rotate(0deg);
    }
    100% {
        transform: translate(-50%, -50%) rotate(360deg);
    }
}