@media only screen and (max-width: 768px) {
    #main-page {
        min-height: 100vh;
        display: flex;
        align-items: center;
        justify-content: center;
        flex-direction: column;
    }

    #main-page .container {
        margin: 0 auto;
    }

    #main-page .container .row {
        padding-top: 6vh;
        padding-bottom: 6vh;
    }

    /* Hero image sizing: full width on small screens, constrained on larger */
    .hero-image {
        width: 100%;
        height: auto;
        object-fit: contain;
        display: block;
        margin-right: 0%;
    }
    .col-md-6 .align-main-title {
        margin: 0 auto;
        padding: 0;
        align-items: center;
    }

    #comment,
    #pourquoi,
    .div7,
    .div10,
    .div11,
    .div13,
    .div14 {
        padding-top: 3vh;
        padding-bottom: 3vh;
    }


    /* ============================== MENU ===================================== */
    #page-wrapper #header {
        background: none;
        height: auto;
    }

    /* Nav: mobile-first: vertical stack with centered items */
    #nav {
        width: 100%;
    }

    #nav>ul {
        display: flex;
        flex-direction: column;
        gap: 0.5rem;
        align-items: center;
        padding: 0.75rem 1rem;
        margin: 0 auto;
        box-shadow: inset 0px 0px 1px 1px var(--color-blue);
        background: transparent;
    }

    #nav>ul>li {
        list-style: none;
        display: block;
    }

    #nav>ul>li>a {
        color: var(--color-blue);
        font-weight: bold;
        font-size: 1rem;
        padding: 0.25rem 0.5rem;
    }

    /* Desktop: horizontal nav */
    @media (min-width: 768px) {
        #nav>ul {
            flex-direction: row;
            justify-content: center;
            max-width: 80vw;
            gap: 1rem;
        }

        #nav>ul>li {
            display: flex;
            align-items: center;
        }

        #nav>ul>li:first-child {
            padding-right: 6vw;
        }
    }

    /* Fixed nav on scroll (keeps existing behaviour but verifies sizes) */
    #nav.nav-fixed {
        position: fixed;
        top: 0;
        left: 0;
        width: 100%;
        z-index: 20000;
    }
}