@media (max-width: 768px) {
    .container {
        padding: 0 20px;
    }

    .header {
        width: calc(100% - 40px);
        padding: 15px 20px;
        border-radius: 10px;
    }

    .nav-menu {
        display: none;
        flex-direction: column;
        position: absolute;
        top: 100%;
        left: 0;
        width: 100%;
        background: #1E3A8A;
        padding: 10px 0;
        text-align: center;
    }

    .nav-menu li {
        width: 100%;
        text-align: center;
    }

    .nav-menu a {
        padding: 15px;
        display: block;
    }

    .menu-toggle {
        display: flex;
    }

    .nav-menu.show {
        display: flex;
    }

    .speakers-list {
        flex-direction: column;
        align-items: center;
    }

    .speaker-card {
        max-width: 90%;
    }

    .footer {
        padding: 20px 20px;
    }
}