body {
    margin: 0;
    position: relative;
    min-height: 100vh;
    background-color: 000000;
}

#container {
    position: absolute;
    overflow: hidden;
}

.loading {
    width: 100%;
    height: 100%;
    position: fixed;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(0, 0, 0, 0.9);
    color: aliceblue;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
    z-index: 2;
}

.loading_opened {
    opacity: 1;
    visibility: visible;
    transition: all 0.3s ease;
}