@media (max-width: 768px) {
    body.modal-open {
        overflow: hidden !important; height: 100vh !important; position: fixed !important; width: 100% !important;
    }


    .sub-page-container {
        margin-top: 60px !important; padding: 85px 12px 40px !important; 
        display: flex !important; flex-direction: column !important; gap: 30px !important;
    }


    .nav-container {
        height: 60px; padding: 0 15px; position: relative;
    }

    .mobile-menu-btn {
        display: flex !important; 
        visibility: visible !important; 
        opacity: 1 !important;
        pointer-events: auto !important; 
        position: relative; 
        z-index: 1100; 
        background: rgba(159, 128, 218, 0.15);
        border: 1px solid var(--accent-primary); 
        color: var(--text-main);
        width: 40px; 
        height: 35px; 
        align-items: center; 
        justify-content: center;
        border-radius: 8px; 
        cursor: pointer; 
        order: 3;
    }


    .mobile-menu-btn i {
        pointer-events: none !important;
    }

    #auth-ui { order: 2; margin-right: 10px; }
    .logo { order: 1; font-size: 1.1rem; }
    .donate-btn, .nav-links { display: none !important; }

    .terminal-section { margin-bottom: 20px; }
    .terminal-window { border-radius: 12px !important; margin-bottom: 0 !important; }
    .terminal-bar { padding: 8px 12px; }
    .window-title { font-size: 0.65rem; }
    .terminal-content { padding: 12px 10px; }

    .ct-tab { padding: 5px 2px; font-size: 0.7rem; }
    .terminal-filters { gap: 4px; margin-bottom: 12px; }
    .term-btn { padding: 4px 8px; font-size: 0.7rem; }
    .terminal-search-box { padding: 7px 12px; font-size: 0.75rem; margin-bottom: 15px; }
    .term-book-grid {
        display: grid !important; grid-template-columns: repeat(2, 1fr) !important;
        gap: 12px !important; padding: 10px !important;
    }
    .term-book-grid > *:nth-child(n+5) { display: none !important; }
    .book-cover { height: 120px !important; border-radius: 8px !important; }
    .book-info { padding: 8px !important; gap: 4px !important; }
    .book-info h3 { font-size: 0.75rem !important; display: -webkit-box; -webkit-line-clamp: 1; -webkit-box-orient: vertical; overflow: hidden; }
    .book-meta .badge, .book-meta .grade-badge { font-size: 0.6rem !important; padding: 1px 5px !important; }
    .btn-read { padding: 3px 8px !important; font-size: 0.65rem !important; }

    .term-grid a { padding: 10px 12px !important; min-height: 50px !important; gap: 10px !important; }
    .term-grid a::before, .term-grid a i.file-icon { width: 30px !important; height: 30px !important; font-size: 0.8rem !important; }
    .term-grid a h4 { font-size: 0.75rem !important; }
    .file-meta span { font-size: 0.6rem !important; }


    .modal-overlay { padding: 15px !important; align-items: center !important; }
    .modal-terminal-window {
        width: 100% !important; max-width: 100% !important; height: 85vh !important; max-height: 85vh !important;
        display: flex !important; flex-direction: column !important; border-radius: 16px !important; margin-top: 20px;
    }
    .modal-terminal-window .terminal-bar { flex-shrink: 0 !important; }
    .full-height-scroll {
        flex: 1 !important; overflow-y: auto !important; -webkit-overflow-scrolling: touch;
        padding: 15px !important; display: block !important;
    }
    .full-height-scroll .term-book-grid > *:nth-child(n+5) { display: block !important; }
}




.mobile-nav-overlay {

    pointer-events: none;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
}

.mobile-nav-overlay.active {

    pointer-events: auto;
    opacity: 1;
    visibility: visible;
    display: flex; 
}