/* ==================== MOBILE RESPONSIVE CSS ====================*/

/* Base Styles - Apply to All */
* {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

/* Prevent horizontal scroll */
html, body {
    overflow-x: hidden;
    width: 100%;
}

/* Hide hamburger menu on desktop */
.toggle-menu {
    display: none;
}

.menu-overlay {
    display: none;
}

/* ==================== MOBILE STYLES (MAX-WIDTH: 768px) ==================== */
@media (max-width: 768px) {
    /* CRITICAL: Override external CSS that might hide menu */
    .menu-navigasi {
        display: flex !important;
    }

    /* Fix body when menu open */
    body.menu-open {
        overflow: hidden !important;
    }

    /* Fixed Header */
    .header-utama {
        position: fixed !important;
        top: 0 !important;
        left: 0 !important;
        right: 0 !important;
        width: 100% !important;
        background: linear-gradient(135deg, #667eea 0%, #764ba2 100%) !important;
        z-index: 1000 !important;
        box-shadow: 0 2px 10px rgba(0,0,0,0.1) !important;
    }

    /* Navbar Container - COMPACT */
    .container-navbar {
        display: flex !important;
        justify-content: space-between !important;
        align-items: center !important;
        padding: 10px 15px !important;
        min-height: 55px !important;
        max-width: 100% !important;
    }

    .navbar-utama {
        padding: 0 !important;
        width: 100% !important;
    }

    /* Logo - Always Visible - COMPACT */
    .logo-brand {
        display: flex !important;
        align-items: center !important;
        flex: 1 !important;
        z-index: 1001 !important;
    }

    .logo-link {
        display: flex !important;
        align-items: center !important;
        gap: 8px !important;
        text-decoration: none !important;
    }

    .logo-icon {
        width: 35px !important;
        height: 35px !important;
        font-size: 1em !important;
        border-radius: 8px !important;
        display: flex !important;
        align-items: center !important;
        justify-content: center !important;
    }

    .logo-text {
        font-size: 1.3em !important;
        color: white !important;
        margin: 0 !important;
    }

    .logo-brand h1 {
        font-size: 18px !important;
        display: flex !important;
        align-items: center !important;
        gap: 6px !important;
        margin: 0 !important;
        color: white !important;
    }

    .logo-brand h1 i {
        font-size: 20px !important;
    }

    /* Show Hamburger Menu - COMPACT */
    .toggle-menu {
        display: block !important;
        order: 3 !important;
        color: white !important;
        background: rgba(255, 255, 255, 0.1) !important;
        padding: 8px 12px !important;
        border-radius: 6px !important;
        font-size: 20px !important;
        border: none !important;
        cursor: pointer !important;
        z-index: 1001 !important;
        -webkit-tap-highlight-color: transparent !important;
        user-select: none !important;
    }

    .toggle-menu:hover,
    .toggle-menu:active {
        background: rgba(255, 255, 255, 0.2) !important;
    }

    .toggle-menu i {
        font-size: 20px !important;
        pointer-events: none !important;
    }

    /* Menu Overlay */
    .menu-overlay {
        display: none;
        position: fixed !important;
        top: 0 !important;
        left: 0 !important;
        width: 100% !important;
        height: 100% !important;
        background: rgba(0, 0, 0, 0.5) !important;
        z-index: 998 !important;
        opacity: 0;
        transition: opacity 0.3s ease !important;
    }

    .menu-overlay.active {
        display: block !important;
        opacity: 1 !important;
    }

    /* Mobile Menu - Slide from Left */
    .menu-navigasi {
        position: fixed !important;
        top: 0 !important;
        left: -100% !important;
        width: 75% !important;
        max-width: 280px !important;
        height: 100vh !important;
        background: white !important;
        flex-direction: column !important;
        padding: 60px 12px 12px !important;
        transition: left 0.3s ease !important;
        box-shadow: 2px 0 20px rgba(0,0,0,0.2) !important;
        overflow-y: auto !important;
        z-index: 999 !important;
        display: flex !important;
        align-items: stretch !important;
        list-style: none !important;
        margin: 0 !important;
        gap: 2px !important;
    }

    .menu-navigasi.active {
        left: 0 !important;
    }

    /* Menu Items */
    .menu-navigasi > li {
        width: 100% !important;
        margin: 2px 0 !important;
        display: block !important;
        opacity: 1 !important;
        visibility: visible !important;
        list-style: none !important;
    }

    .menu-navigasi > li > a,
    .menu-navigasi > li > .nav-link,
    .menu-navigasi > li > .btn-masuk {
        display: flex !important;
        align-items: center !important;
        padding: 12px 16px !important;
        border-radius: 8px !important;
        text-align: left !important;
        min-height: 44px !important;
        width: 100% !important;
        opacity: 1 !important;
        visibility: visible !important;
        background: #f8f9fa !important;
        color: #333 !important;
        text-decoration: none !important;
        font-size: 15px !important;
        font-weight: 500 !important;
        transition: all 0.3s !important;
        border: none !important;
        box-sizing: border-box !important;
    }

    .menu-navigasi > li > a:hover,
    .menu-navigasi > li > .nav-link:hover,
    .menu-navigasi > li > .btn-masuk:hover {
        background: #667eea !important;
        color: white !important;
        transform: translateX(5px) !important;
    }

    .menu-navigasi > li > .aktif,
    .menu-navigasi > li > a.aktif,
    .menu-navigasi > li > .nav-link.aktif {
        background: #667eea !important;
        color: white !important;
    }

    /* Main Content Padding */
    body {
        padding-top: 55px !important;
    }

    main {
        margin-top: 0 !important;
        padding-top: 0 !important;
    }
    
    /* Hero Section */
    .hero-section {
        padding: 60px 20px 40px !important;
        min-height: auto !important;
    }

    .konten-hero {
        flex-direction: column !important;
        text-align: center !important;
        gap: 30px !important;
    }

    .teks-hero {
        max-width: 100% !important;
    }

    .judul-hero {
        font-size: 2rem !important;
        line-height: 1.3 !important;
        margin-bottom: 15px !important;
    }

    .deskripsi-hero {
        font-size: 1rem !important;
        line-height: 1.6 !important;
        margin-bottom: 25px !important;
    }

    /* Section Padding */
    .section-fitur,
    .section-materi,
    .section-tentang,
    .section-latihan,
    .section-quiz {
        padding: 50px 20px !important;
    }

    /* Container */
    .container, 
    .container-hero,
    .container-navbar {
        padding: 0 20px !important;
        max-width: 100% !important;
    }

    /* Typography */
    .judul-section {
        font-size: 1.8rem !important;
        margin-bottom: 40px !important;
    }

    h1 {
        font-size: 1.8rem !important;
    }

    h2 {
        font-size: 1.5rem !important;
    }

    h3 {
        font-size: 1.2rem !important;
    }

    /* Grid Layouts */
    .grid-fitur, 
    .grid-materi,
    .grid-latihan,
    .grid-quiz {
        grid-template-columns: 1fr !important;
        gap: 20px !important;
    }

    /* Content Layouts */
    .konten-tentang,
    .konten-materi {
        grid-template-columns: 1fr !important;
        flex-direction: column !important;
        gap: 30px !important;
        text-align: center !important;
    }

    /* Button Groups */
    .tombol-hero,
    .btn-group {
        flex-direction: column !important;
        gap: 15px !important;
        align-items: stretch !important;
        width: 100% !important;
    }

    /* Buttons */
    .btn-primer, 
    .btn-sekunder, 
    .btn-masuk,
    .btn-materi,
    button[type="submit"] {
        width: 100% !important;
        min-height: 48px !important;
        padding: 12px 24px !important;
        font-size: 15px !important;
        text-align: center !important;
        display: block !important;
    }

    /* Cards */
    .kartu-fitur,
    .kartu-materi,
    .kartu-latihan,
    .kartu-quiz,
    .card {
        margin-bottom: 20px !important;
        padding: 25px 20px !important;
    }

    /* Footer */
    .footer-utama {
        padding: 40px 20px 20px !important;
    }

    .konten-footer {
        flex-direction: column !important;
        grid-template-columns: 1fr !important;
        gap: 30px !important;
        text-align: center !important;
    }
    
    .link-footer h4, .kontak-footer h4 {
    margin-bottom: 15px;
    color: #ffd700;

    /* Images */
    img {
        max-width: 100% !important;
        height: auto !important;
    }

    /* Tables */
    table {
        display: block !important;
        overflow-x: auto !important;
        -webkit-overflow-scrolling: touch !important;
    }

    /* Illustrations */
    .ilustrasi-matematika {
        padding: 20px !important;
        gap: 15px !important;
    }

    .ilustrasi-matematika i {
        font-size: 3rem !important;
        padding: 20px !important;
    }

    /* Stats */
    .statistik-tentang {
        flex-direction: column !important;
        gap: 20px !important;
    }

    .item-statistik h3 {
        font-size: 2rem !important;
    }
}

/* ==================== EXTRA SMALL MOBILE (MAX-WIDTH: 480px) ==================== */
@media (max-width: 480px) {
    .container-navbar {
        padding: 8px 12px !important;
    }

    .logo-icon {
        width: 32px !important;
        height: 32px !important;
        font-size: 0.9em !important;
    }

    .logo-text {
        font-size: 1.2em !important;
    }

    .toggle-menu {
        padding: 6px 10px !important;
        font-size: 18px !important;
    }

    .judul-hero {
        font-size: 1.5rem !important;
    }

    .deskripsi-hero {
        font-size: 0.9rem !important;
    }

    .menu-navigasi {
        width: 85% !important;
        max-width: 260px !important;
    }
}

/* ==================== TABLET (769px - 1024px) ==================== */
@media (min-width: 769px) and (max-width: 1024px) {
    .grid-fitur, 
    .grid-materi,
    .grid-latihan,
    .grid-quiz {
        grid-template-columns: repeat(2, 1fr) !important;
        gap: 30px !important;
    }

    .container {
        padding: 0 40px !important;
    }

    .hero-section {
        padding: 100px 40px 80px !important;
    }
}

/* ==================== LANDSCAPE MOBILE ==================== */
@media (max-width: 896px) and (orientation: landscape) {
    .hero-section {
        padding: 80px 20px 40px !important;
        min-height: auto !important;
    }

    .menu-navigasi {
        max-height: 90vh !important;
        overflow-y: auto !important;
    }
}