/* css/responsive.css */
@media (max-width: 992px) {
    .overview-section .container {
        grid-template-areas: 
            "info"
            "timeline"
            "stats";
    }

    .tabs {
        flex-direction: column;
    }
    .tab-buttons {
        flex-direction: row;
        overflow-x: auto;
        flex: 1 1 auto;
        padding-bottom: 10px;
    }
    .tab-btn {
        white-space: nowrap;
        border-right: none;
        border-bottom: 3px solid transparent;
    }
     .tab-btn.active {
        border-right-color: transparent;
        border-bottom-color: var(--secondary-color);
    }
    .quiz-options {
        grid-template-columns: 1fr;
    }
     .feature-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    h1 { font-size: 2.5rem; }
    h2 { font-size: 2rem; }

    .nav-menu {
        position: fixed;
        top: 70px;
        right: -100%;
        width: 100%;
        height: calc(100vh - 70px);
        background-color: var(--card-bg-color);
        flex-direction: column;
        align-items: center;
        padding-top: 2rem;
        transition: right 0.3s ease-in-out;
    }
    .nav-menu.active {
        right: 0;
    }
    .hamburger {
        display: block;
    }

    .drag-drop-area {
        flex-direction: column;
    }
    .drag-categories, .drag-items {
        width: 100%;
    }
}