@media screen and (max-width: 1024px) {
    .container {
        max-width: 90%;
    }
    
    .hero h1 {
        font-size: 2.5rem;
    }
}

@media screen and (max-width: 768px) {
    .nav-menu {
        display: none;
        position: fixed;
        top: 60px;
        left: 0;
        width: 100%;
        background: var(--background-color);
        padding: 1rem;
        flex-direction: column;
        text-align: center;
    }

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

    .mobile-menu-toggle {
        display: block;
        cursor: pointer;
    }

    .mobile-menu-toggle span {
        display: block;
        width: 25px;
        height: 3px;
        background: var(--text-color);
        margin: 5px 0;
    }

    .hero h1 {
        font-size: 2rem;
    }

    .topics-grid {
        grid-template-columns: 1fr;
    }
}

@media screen and (max-width: 480px) {
    .hero-content {
        padding: 1rem;
    }

    .section-padding {
        padding: 3rem 0;
    }
}