/* Tablet and below */
@media (max-width: 768px) {
    .main-header .container {
        flex-wrap: wrap;
    }

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

    .nav-links {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background-color: var(--bg-white);
        flex-direction: column;
        gap: 0;
        padding: 20px;
        box-shadow: var(--shadow-md);
        width: 100%;
    }

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

    .nav-links a {
        padding: 12px 0;
        border-bottom: 1px solid var(--border-color);
    }

    .header-actions {
        width: 100%;
        margin-top: 15px;
    }

    .header-actions .btn {
        width: 100%;
    }

    /* Hero */
    .hero-container {
        grid-template-columns: 1fr;
        gap: 30px;
    }

    .hero-text h1 {
        font-size: 1.8rem;
    }

    .hero-text p {
        font-size: 1rem;
    }

    /* Programs */
    .programs-section {
        padding: 60px 0;
    }

    .programs-section h2 {
        font-size: 1.6rem;
    }

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

    /* Features */
    .why-us-section {
        padding: 60px 0;
    }

    .why-us-section h2 {
        font-size: 1.6rem;
    }

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

    /* CTA */
    .cta-section {
        padding: 60px 0;
    }

    .cta-section h2 {
        font-size: 1.6rem;
    }

    /* Testimonials */
    .testimonials-section {
        padding: 60px 0;
    }

    .testimonials-section h2 {
        font-size: 1.6rem;
    }

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

    /* Page Header */
    .page-header {
        padding: 40px 0;
    }

    .page-header h1 {
        font-size: 1.5rem;
    }

    /* Contact */
    .contact-container {
        grid-template-columns: 1fr;
    }

    .contact-info-box,
    .contact-form-box {
        padding: 25px;
    }

    /* Video */
    .video-layout {
        grid-template-columns: 1fr;
    }

    .sidebar-course-list {
        order: -1;
    }
}

/* Mobile phones */
@media (max-width: 480px) {
    .container {
        padding: 0 15px;
    }

    .logo img {
        height: 45px;
    }

    /* Nav */
    .nav-links {
        gap: 0;
        padding: 15px;
    }

    .nav-links a {
        font-size: 0.9rem;
    }

    /* Hero */
    .hero-section {
        padding: 40px 0;
    }

    .hero-text h1 {
        font-size: 1.5rem;
        margin-bottom: 15px;
    }

    .hero-text p {
        font-size: 0.95rem;
        margin-bottom: 25px;
    }

    .btn-lg {
        padding: 12px 30px;
        font-size: 0.95rem;
        width: 100%;
    }

    /* Programs */
    .programs-section {
        padding: 50px 0;
    }

    .programs-section h2 {
        font-size: 1.4rem;
        margin-bottom: 10px;
    }

    .section-subtitle {
        margin-bottom: 30px;
        font-size: 0.9rem;
    }

    .programs-grid {
        gap: 20px;
    }

    .program-image {
        height: 180px;
    }

    .program-content {
        padding: 20px;
    }

    .program-content h3 {
        font-size: 1.05rem;
    }

    .program-content p {
        font-size: 0.9rem;
        margin-bottom: 15px;
    }

    .program-features li {
        font-size: 0.85rem;
        margin-bottom: 6px;
    }

    .btn-sm {
        padding: 9px 16px;
        font-size: 0.85rem;
        width: 100%;
    }

    /* Features */
    .why-us-section {
        padding: 50px 0;
    }

    .why-us-section h2 {
        font-size: 1.4rem;
        margin-bottom: 30px;
    }

    .features-grid {
        gap: 20px;
    }

    .feature-item {
        padding: 20px;
    }

    .feature-icon {
        width: 50px;
        height: 50px;
        font-size: 24px;
        margin-bottom: 15px;
    }

    .feature-item h3 {
        font-size: 1rem;
    }

    .feature-item p {
        font-size: 0.9rem;
    }

    /* CTA */
    .cta-section {
        padding: 50px 0;
    }

    .cta-section h2 {
        font-size: 1.4rem;
        margin-bottom: 10px;
    }

    .cta-section p {
        font-size: 0.95rem;
        margin-bottom: 20px;
    }

    /* Testimonials */
    .testimonials-section {
        padding: 50px 0;
    }

    .testimonials-section h2 {
        font-size: 1.4rem;
        margin-bottom: 30px;
    }

    .testimonials-grid {
        gap: 20px;
    }

    .testimonial-card {
        padding: 20px;
    }

    .testimonial-content p {
        font-size: 0.9rem;
    }

    .author-name {
        font-size: 0.95rem;
    }

    /* Footer */
    .main-footer {
        padding: 50px 0 15px;
    }

    .footer-content {
        grid-template-columns: 1fr;
        gap: 25px;
    }

    .footer-col h3 {
        font-size: 0.95rem;
        margin-bottom: 15px;
    }

    .footer-col p,
    .footer-col ul li {
        font-size: 0.85rem;
    }

    /* Page Header */
    .page-header {
        padding: 30px 0;
    }

    .page-header h1 {
        font-size: 1.3rem;
    }

    .breadcrumb {
        font-size: 0.8rem;
    }

    /* Forms */
    .form-control {
        padding: 10px 12px;
        font-size: 0.9rem;
    }

    .form-group label {
        font-size: 0.9rem;
    }

    textarea.form-control {
        min-height: 120px;
    }

    /* Contact */
    .contact-section {
        padding: 40px 0;
    }

    .contact-info-box,
    .contact-form-box {
        padding: 20px;
    }

    .info-item {
        margin-bottom: 20px;
    }

    .info-item h4 {
        font-size: 0.95rem;
        margin-bottom: 6px;
    }

    .info-item p {
        font-size: 0.9rem;
    }

    /* Library */
    .library-section {
        padding: 40px 0;
    }

    .library-controls {
        flex-direction: column;
        gap: 15px;
        padding: 20px;
    }

    .search-box {
        min-width: 100%;
    }

    .search-box input {
        font-size: 0.9rem;
    }

    .filter-box select {
        width: 100%;
        font-size: 0.9rem;
    }

    .books-grid {
        grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
        gap: 15px;
        margin-bottom: 30px;
    }

    .book-cover {
        height: 220px;
    }

    .book-details {
        padding: 12px;
    }

    .book-details h3 {
        font-size: 0.85rem;
    }

    .book-author {
        font-size: 0.75rem;
    }

    /* Video */
    .video-section {
        padding: 40px 0;
    }

    .video-layout {
        gap: 20px;
    }

    .video-info {
        padding: 20px;
    }

    .video-info h2 {
        font-size: 1.1rem;
    }

    .video-meta {
        flex-wrap: wrap;
        gap: 10px;
        font-size: 0.8rem;
    }

    .video-description {
        font-size: 0.9rem;
    }

    /* Success/Error messages */
    .success-message {
        padding: 12px;
        font-size: 0.85rem;
    }

    .error-message {
        font-size: 0.75rem;
    }
}

/* Extra small devices */
@media (max-width: 360px) {
    .container {
        padding: 0 12px;
    }

    .hero-text h1 {
        font-size: 1.3rem;
    }

    .hero-text p {
        font-size: 0.9rem;
    }

    .programs-section h2,
    .why-us-section h2,
    .cta-section h2,
    .testimonials-section h2 {
        font-size: 1.2rem;
    }

    .btn-lg {
        padding: 10px 20px;
        font-size: 0.9rem;
    }

    .btn-sm {
        padding: 8px 12px;
        font-size: 0.8rem;
    }

    .program-content {
        padding: 15px;
    }

    .feature-item {
        padding: 15px;
    }

    .books-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}