.loading-overlay {
    position: fixed;
    z-index: 9999;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(20, 29, 45, 0.68);
    opacity: 0;
    pointer-events: none;
    visibility: hidden;
    transition: opacity 0.2s ease, visibility 0.2s ease;
}

.loading-overlay.visible {
    opacity: 1;
    pointer-events: all;
    visibility: visible;
}

.loading-spinner {
    width: 52px;
    height: 52px;
    border: 4px solid rgba(255, 255, 255, 0.35);
    border-top-color: #fff;
    border-radius: 50%;
    animation: loading-spin 0.8s linear infinite;
}

@keyframes loading-spin {
    to {
        transform: rotate(360deg);
    }
}