.button-loading {
    pointer-events: none;
    opacity: 0.8;
    cursor: not-allowed;
    position: relative;
}

.button-loading .loading-spinner {
    display: inline-block;
    margin-left: 8px;
    animation: spin 1s linear infinite;
}

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