.loading-screen {

    position: absolute;
    inset: 0;

    display: flex;
    justify-content: center;
    align-items: center;

    pointer-events: none;
    z-index: 10;

    /*width: 100%;
    min-height: 100%;*/

    /*inset: 0;
    position: fixed;*/
}
.circle {
    width: 20px;
    height: 20px;
    margin: 0 10px;
    border-radius: 50%;
    background: #3498db;
    animation: inflate-deflate 1s infinite ease-in-out;
}
.circle:nth-child(1) {
    animation-delay: 0s;
}
.circle:nth-child(2) {
    animation-delay: 0.2s;
}
.circle:nth-child(3) {
    animation-delay: 0.4s;
}

@keyframes inflate-deflate {
    0%, 100% {
        transform: scale(1);
    }
    50% {
        transform: scale(1.5);
    }
}