@media (max-width: 900px) {
    .main-nav {
        position: fixed;
        top: var(--header-height);
        right: -100%;
        width: 280px;
        height: calc(100vh - var(--header-height));
        background-color: var(--color-header-bg);
        transition: right 0.3s ease;
        box-shadow: -4px 0 15px rgba(0,0,0,0.1);
    }

    .main-nav.active {
        right: 0;
    }

    .main-nav ul {
        flex-direction: column;
        padding: 30px;
        gap: 25px;
    }

    .btn-buy-header {
        display: none;
    }

    .burger-menu {
        display: flex;
    }

    .hero-content {
        margin-left: 5%;
        max-width: 90%;
    }

    .hero-content h1 {
        font-size: 36px;
    }

    .hero-content p {
        font-size: 16px;
    }

    .hero-buttons {
        flex-direction: column;
        gap: 12px;
    }

    .btn {
        width: 100%;
    }

    .hero {
        height: 90vh;
        max-height: 900px;
        min-height: 600px;
    }

    /* Sur mobile, les deux moitiés s'empilent verticalement */
    .hero-split {
        flex-direction: column;
    }

    .hero-half-left {
        border-right: none;
        border-bottom: 2px solid rgba(255, 255, 255, 0.3);
    }

    .hero-half-content h1 {
        font-size: 26px;
    }

    .hero-half-content p {
        font-size: 14px;
    }
}