#loading {
    position: fixed;
    inset: 0;
    background: white;
    z-index: 9999;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 1;
    transition: opacity 0.8s ease;
}

#loading.fade-out {
    opacity: 0;
}

#loading .spinner {
    width: 100px;
    aspect-ratio: 1;
    border-radius: 50%;
    border: 8px solid grey;
    animation:
        l20-1 0.8s infinite linear alternate,
        l20-2 1.6s infinite linear;
}
@keyframes l20-1{
    0%    {clip-path: polygon(50% 50%,0       0,  50%   0%,  50%    0%, 50%    0%, 50%    0%, 50%    0% )}
    12.5% {clip-path: polygon(50% 50%,0       0,  50%   0%,  100%   0%, 100%   0%, 100%   0%, 100%   0% )}
    25%   {clip-path: polygon(50% 50%,0       0,  50%   0%,  100%   0%, 100% 100%, 100% 100%, 100% 100% )}
    50%   {clip-path: polygon(50% 50%,0       0,  50%   0%,  100%   0%, 100% 100%, 50%  100%, 0%   100% )}
    62.5% {clip-path: polygon(50% 50%,100%    0, 100%   0%,  100%   0%, 100% 100%, 50%  100%, 0%   100% )}
    75%   {clip-path: polygon(50% 50%,100% 100%, 100% 100%,  100% 100%, 100% 100%, 50%  100%, 0%   100% )}
    100%  {clip-path: polygon(50% 50%,50%  100%,  50% 100%,   50% 100%,  50% 100%, 50%  100%, 0%   100% )}
}
@keyframes l20-2{ 
    0%    {transform:scaleY(1)  rotate(0deg)}
    49.99%{transform:scaleY(1)  rotate(135deg)}
    50%   {transform:scaleY(-1) rotate(0deg)}
    100%  {transform:scaleY(-1) rotate(-135deg)}
}