.loading-overlay {
    position: fixed;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9999;
    background-color: rgba(255, 255, 255, 0.7);
    backdrop-filter: blur(2px);
}

.loading-overlay.chart-overlay {
    position: absolute;
    z-index: 50;
    background-color: rgba(255, 255, 255, 0.8);
}

.loading-spinner {
    border: 20px solid rgba(219, 232, 224, 1);
    border-top: 20px solid rgba(122, 218, 134, 1);
    border-radius: 50%;
    width: 200px;
    height: 200px;
    animation: loading-spin 1s linear infinite;
    position: absolute;
    top: calc( 50% - 100px);
    left: calc( 50% - 100px);
}

.dark .loading-spinner{
    border: 20px solid rgba(34, 44, 38, 1);
    border-top: 20px solid rgba(122, 218, 134, 1);
}

@keyframes loading-spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* Dark mode */
.dark .loading-overlay {
    background-color: rgba(0, 0, 0, 0.5);
}

.dark .loading-overlay.chart-overlay {
    background-color: rgba(0, 0, 0, 0.6);
}