.loading {
    background-image: linear-gradient(45deg, rgba(255,255,255,0.15) 25%, transparent 25%, transparent 50%, rgba(255,255,255,0.15) 50%, rgba(255,255,255,0.15) 75%, transparent 75%, transparent);
    background-size: 1rem 1rem;
    animation: loading-stripes 1s linear infinite;
}
@keyframes loading-stripes {
    from { background-position: 1rem 0; }
    to { background-position: 0 0; }
}