/* --- Base Styles --- */
:root {
    --primary: #4f46e5;
    --text-main: #1e293b;
    --text-muted: #64748b;
    --nav-bg: #ffffff;
}

.top-nav {
    background: var(--nav-bg);
    border-bottom: 1px solid #e2e8f0;
    padding: 0 2rem;
    height: 70px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    position: sticky;
    top: 0;
    z-index: 1000;
}

.nav-logo {
    font-weight: 800;
    color: var(--primary);
    text-decoration: none;
    font-size: 1.5rem;
    letter-spacing: -0.5px;
}

.nav-links {
    display: flex;
    gap: 20px;
    align-items: center;
}

.nav-links a {
    text-decoration: none;
    color: var(--text-muted);
    font-size: 0.9rem;
    font-weight: 500;
    transition: color 0.2s;
    white-space: nowrap;
}

.nav-links a:hover, .nav-links a.active {
    color: var(--primary);
}

/* --- Responsive Design (Mobile) --- */

/* Bouton Hamburger (caché sur bureau) */
.menu-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
    background: none;
    border: none;
}

.menu-toggle span {
    width: 25px;
    height: 3px;
    background-color: var(--primary);
    border-radius: 3px;
}

@media (max-width: 992px) {
    .menu-toggle {
        display: flex; /* Apparaît sur mobile */
    }

    .nav-links {
        display: none; /* Caché par défaut */
        flex-direction: column;
        position: absolute;
        top: 70px;
        left: 0;
        width: 100%;
        background: white;
        padding: 20px 0;
        border-bottom: 2px solid var(--primary);
        box-shadow: 0 10px 15px rgba(0,0,0,0.1);
        gap: 0;
    }

    /* Quand le menu est ouvert */
    .nav-links.active {
        display: flex;
    }

    .nav-links a {
        width: 100%;
        padding: 15px 2rem;
        box-sizing: border-box;
        border-bottom: 1px solid #f1f5f9;
    }
}