/* --- MENU LATÉRAL --- */
.side-nav {
    position: fixed; /* Reste visible pendant le scroll */
    right: 40px; /* Position harmonisée pour le bureau */
    top: 50%;
    transform: translateY(-50%);
    display: flex;
    flex-direction: column;
    gap: 20px;
    z-index: 1000;
}

.nav-item {
    width: 50px; height: 50px;
    border-radius: 50%;
    border: 1px solid rgba(255, 255, 255, 0.1);
    background: rgba(0, 0, 0, 0.8);
    display: flex;
    justify-content: center;
    align-items: center;
    cursor: pointer;
    transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    font-size: 20px;
}

.nav-item:hover {
    border-color: var(--accent-color);
    transform: scale(1.15) translateX(-5px);
    box-shadow: 0 0 20px rgba(0, 242, 255, 0.4);
    color: var(--accent-color);
}

.nav-item.active {
    border-color: var(--accent-color);
    color: var(--accent-color);
    box-shadow: 0 0 15px rgba(0, 242, 255, 0.3);
}
.nav-item.hidden {
    display: none !important;
}