body {
    background-color: #fff;
}

/* Optimisation du loader AJAX */
#main-content.is-loading {
    opacity: 0.6;
    pointer-events: none;
    position: relative;
}

#main-content.is-loading::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 40px;
    height: 40px;
    border: 4px solid #f3f3f3;
    border-top: 4px solid #3498db;
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
    z-index: 1000;
}

@keyframes spin {
    0% { transform: translate(-50%, -50%) rotate(0deg); }
    100% { transform: translate(-50%, -50%) rotate(360deg); }
}

/* Optimisation du scroll smooth */
html {
    scroll-behavior: smooth;
}

/* Performance: utiliser will-change avec parcimonie */
#main-content {
    will-change: contents;
}