/* ============================================
   UNIVERSAL MOBILE RESPONSIVENESS
   For all phone types and screen sizes
   ============================================ */

/* ===== ENHANCED MOBILE VIEWPORT & BASE ===== */
/* Ensure proper viewport handling on all devices */
html {
    -webkit-text-size-adjust: 100%;
    -ms-text-size-adjust: 100%;
    text-size-adjust: 100%;
    overflow-x: hidden;
}

body {
    overflow-x: hidden;
    min-height: 100vh;
    width: 100%;
}

/* ===== UNIVERSAL MOBILE BREAKPOINTS ===== */
/* Small phones: 320px-374px */
@media (max-width: 374px) {
    .container {
        padding: 0 8px !important;
    }

    header h1 {
        font-size: 0.9rem !important;
    }

    .book-card {
        width: 110px !important;
        min-width: 110px !important;
    }

    .book-cover {
        width: 110px !important;
        height: 147px !important;
    }
}

/* Standard phones: 375px-413px */
@media (max-width: 413px) {
    .container {
        padding: 0 10px !important;
    }

    header h1 {
        font-size: 1rem !important;
    }

    .book-card {
        width: 120px !important;
        min-width: 120px !important;
    }

    .book-cover {
        width: 120px !important;
        height: 160px !important;
    }
}

/* Large phones: 414px-479px */
@media (max-width: 479px) {
    .container {
        padding: 0 12px !important;
    }

    .book-card {
        width: 130px !important;
        min-width: 130px !important;
    }

    .book-cover {
        width: 130px !important;
        height: 173px !important;
    }
}

/* Extra large phones/Small tablets: 480px-767px */
@media (max-width: 767px) {

    /* Ensure consistent mobile experience */
    .container {
        padding: 0 16px !important;
        max-width: 100% !important;
    }

    /* Header adjustments for all mobile sizes */
    header {
        height: auto !important;
        min-height: 60px !important;
        padding: 12px 16px !important;
    }

    header h1 {
        font-size: 1.1rem !important;
        line-height: 1.2 !important;
        margin: 0 !important;
    }

    header p {
        display: none !important;
    }

    /* Navigation improvements */
    nav {
        position: sticky !important;
        top: 0 !important;
        z-index: 1000 !important;
        padding: 8px 0 !important;
        background: var(--bg-surface) !important;
        box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1) !important;
        border-bottom: 1px solid var(--border-color) !important;
    }

    nav .container {
        padding: 0 16px !important;
        display: flex !important;
        justify-content: space-between !important;
        align-items: center !important;
        gap: 12px !important;
    }

    /* Hide desktop navigation on mobile */
    nav .nav-links {
        display: none !important;
    }

    /* Mobile search box */
    nav .nav-right {
        display: flex !important;
        align-items: center !important;
        flex: 1 !important;
        gap: 8px !important;
    }

    nav .search-box {
        flex: 1 !important;
        max-width: none !important;
        margin: 0 !important;
        display: flex !important;
    }

    nav .search-box input {
        font-size: 0.85rem !important;
        padding: 8px 12px !important;
        height: 40px !important;
        border-radius: 20px !important;
        background: var(--bg-card) !important;
        border: 1px solid var(--border-color) !important;
        color: var(--white) !important;
    }

    nav .admin-nav-btn {
        font-size: 0.8rem !important;
        white-space: nowrap !important;
        margin-left: 4px !important;
        display: flex !important;
        align-items: center !important;
        gap: 4px !important;
        color: var(--primary-color) !important;
    }

    nav .search-box button {
        height: 40px !important;
        width: 40px !important;
        padding: 0 !important;
        font-size: 0.9rem !important;
        border-radius: 50% !important;
        margin-left: 8px !important;
    }

    /* Mobile menu button */
    .mobile-menu-btn {
        display: flex !important;
        background: none !important;
        border: none !important;
        font-size: 1.4rem !important;
        color: var(--primary-color) !important;
        cursor: pointer !important;
        padding: 8px !important;
        width: 40px !important;
        height: 40px !important;
        align-items: center !important;
        justify-content: center !important;
        border-radius: 50% !important;
        transition: all 0.3s ease !important;
    }

    .mobile-menu-btn:hover {
        background: var(--bg-card) !important;
    }

    /* Hide unnecessary elements */
    nav .donate-btn,
    .username-badge,
    .btn-profile,
    .btn-logout {
        display: none !important;
    }

    /* Theme toggle button */
    .theme-toggle-btn {
        display: flex !important;
        width: 40px !important;
        height: 40px !important;
        padding: 0 !important;
        font-size: 1.1rem !important;
        align-items: center !important;
        justify-content: center !important;
        border-radius: 50% !important;
        background: var(--bg-card) !important;
        border: 1px solid var(--border-color) !important;
        color: var(--primary-color) !important;
    }

    /* Fix sections with inline padding */
    #authorsSection .container,
    #bookRequestSection .container>div,
    #freeBooksBanner .container>div {
        padding: 1.25rem !important;
        border-radius: 16px !important;
    }

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

    #freeBooksBanner h2 {
        font-size: 1.8rem !important;
    }

    footer {
        padding: 2rem 0 1rem !important;
        margin-top: 2rem !important;
    }

    .footer-content {
        grid-template-columns: 1fr !important;
        gap: 1.5rem !important;
        text-align: center !important;
    }

    .footer-section h3 {
        justify-content: center !important;
    }
}

/* ===== ENHANCED MOBILE BOOK CARDS ===== */
@media (max-width: 767px) {

    /* Universal book card styling */
    .book-card {
        width: 130px !important;
        min-width: 130px !important;
        flex-shrink: 0 !important;
        border-radius: 12px !important;
        box-shadow: 0 4px 12px rgba(123, 31, 162, 0.15) !important;
        transition: all 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275) !important;
        background: var(--bg-card) !important;
        overflow: hidden !important;
        position: relative !important;
        cursor: pointer !important;
        border: 1px solid var(--border-color) !important;
    }

    .book-card:hover,
    .book-card:active {
        transform: translateY(-4px) scale(1.02) !important;
        box-shadow: 0 8px 20px rgba(123, 31, 162, 0.25) !important;
    }

    .book-cover {
        width: 130px !important;
        height: 140px !important;
        /* Shorter */
        position: relative !important;
        overflow: hidden !important;
        background: linear-gradient(135deg, #e1bee7 0%, #ba68c8 100%) !important;
        border-radius: 12px 12px 0 0 !important;
    }

    .cover-image {
        width: 100% !important;
        height: 100% !important;
        object-fit: cover !important;
        transition: transform 0.3s ease !important;
    }

    .book-card:hover .cover-image {
        transform: scale(1.05) !important;
    }

    .book-info {
        padding: 8px 12px 12px 12px !important;
        min-height: 60px !important;
    }

    .book-card h3 {
        font-size: 0.75rem !important;
        line-height: 1.3 !important;
        margin-bottom: 6px !important;
        display: -webkit-box !important;
        -webkit-line-clamp: 2 !important;
        line-clamp: 2 !important;
        -webkit-box-orient: vertical !important;
        overflow: hidden !important;
        font-weight: 700 !important;
        color: var(--text-color) !important;
    }

    .book-author {
        font-size: 0.7rem !important;
        margin-bottom: 0 !important;
        opacity: 0.8 !important;
        color: var(--primary-color) !important;
    }

    /* Hide unnecessary elements on mobile */
    .book-summary,
    .book-buttons,
    .btn-audio,
    .btn-read,
    .btn-details {
        display: none !important;
    }

}

/* ===== RESPONSIVE TYPOGRAPHY ===== */
@media (max-width: 767px) {
    h1 {
        font-size: 1.5rem !important;
        line-height: 1.2 !important;
        color: var(--white) !important;
    }

    h2 {
        font-size: 1.3rem !important;
        line-height: 1.3 !important;
        margin-bottom: 16px !important;
        color: var(--white) !important;
    }

    h3 {
        font-size: 1.1rem !important;
        line-height: 1.4 !important;
        color: var(--text-color) !important;
    }

    p {
        font-size: 0.9rem !important;
        line-height: 1.5 !important;
        color: var(--text-color) !important;
    }

    .btn {
        padding: 12px 20px !important;
        font-size: 0.9rem !important;
        border-radius: 8px !important;
    }
}

/* ===== MOBILE LAYOUTS FOR DIFFERENT PAGES ===== */
@media (max-width: 767px) {

    /* Home page - Horizontal scroll */
    .home-page .book-grid,
    .new-arrivals-section .book-grid,
    .featured-section .book-grid {
        display: flex !important;
        overflow-x: auto !important;
        overflow-y: hidden !important;
        gap: 16px !important;
        padding: 16px 0 !important;
        scroll-snap-type: x mandatory !important;
        -webkit-overflow-scrolling: touch !important;
        -webkit-overflow-scrolling: touch !important;
        scrollbar-width: thin !important;
    }

    .book-grid::-webkit-scrollbar {
        appearance: none;
    }

    .book-grid .book-card {
        scroll-snap-align: start !important;
    }

    /* Genre/Books pages - 2 column grid */
    .genres-page .book-grid,
    .books-page .book-grid,
    .all-books-page .book-grid {
        display: grid !important;
        grid-template-columns: repeat(2, 1fr) !important;
        gap: 16px !important;
        padding: 16px 0 !important;
        overflow-x: visible !important;
    }

    .genres-page .book-card,
    .books-page .book-card,
    .all-books-page .book-card {
        width: 100% !important;
        min-width: unset !important;
    }

    .genres-page .book-cover,
    .books-page .book-cover,
    .all-books-page .book-cover {
        width: 100% !important;
        height: auto !important;
        aspect-ratio: 3 / 4 !important;
    }

    /* Library page - 2 column grid */
    .library-page .book-grid,
    #libraryGrid {
        display: grid !important;
        grid-template-columns: repeat(2, 1fr) !important;
        gap: 16px !important;
        padding: 16px 0 !important;
        overflow-x: visible !important;
    }

    .library-page .book-card,
    #libraryGrid .book-card {
        width: 100% !important;
        min-width: unset !important;
    }

    .library-page .book-cover,
    #libraryGrid .book-cover {
        width: 100% !important;
        height: auto !important;
        aspect-ratio: 3 / 4 !important;
    }
}

/* ===== ENHANCED MOBILE MENU ===== */
@media (max-width: 767px) {
    .mobile-menu-overlay {
        position: fixed !important;
        top: 0 !important;
        left: 0 !important;
        width: 100% !important;
        height: 100% !important;
        background: rgba(0, 0, 0, 0.8) !important;
        z-index: 1001 !important;
        opacity: 0 !important;
        visibility: hidden !important;
        transition: all 0.3s ease !important;
        backdrop-filter: blur(5px) !important;
    }

    .mobile-menu-overlay.active {
        opacity: 1 !important;
        visibility: visible !important;
    }

    .mobile-menu {
        position: fixed !important;
        top: 0 !important;
        right: -100% !important;
        width: 280px !important;
        height: 100% !important;
        background: var(--bg-surface) !important;
        z-index: 1002 !important;
        box-shadow: -5px 0 15px rgba(0, 0, 0, 0.4) !important;
        border-left: 2px solid var(--border-color) !important;
        transition: right 0.3s ease !important;
        display: flex !important;
        flex-direction: column !important;
        overflow-y: auto !important;
    }

    .mobile-menu.active {
        right: 0 !important;
    }

    .mobile-menu-header {
        display: flex !important;
        justify-content: space-between !important;
        align-items: center !important;
        padding: 20px !important;
        border-bottom: 1px solid var(--border-color) !important;
        background: var(--gradient-primary) !important;
        color: var(--white) !important;
    }

    .mobile-nav-links {
        padding: 0 !important;
        overflow-y: auto !important;
        flex: 1 !important;
    }

    .mobile-nav-links a {
        display: flex !important;
        align-items: center !important;
        gap: 16px !important;
        padding: 16px 20px !important;
        color: var(--text-color) !important;
        font-weight: 500 !important;
        transition: all 0.2s ease !important;
        border-left: 4px solid transparent !important;
        text-decoration: none !important;
        font-size: 0.95rem !important;
    }

    .mobile-nav-links a:hover,
    .mobile-nav-links a.active {
        background: var(--bg-card) !important;
        color: var(--primary-color) !important;
        border-left-color: var(--primary-color) !important;
    }

    .mobile-nav-links i {
        width: 20px !important;
        text-align: center !important;
        font-size: 1rem !important;
    }

    .close-menu-btn {
        background: none !important;
        border: none !important;
        font-size: 1.5rem !important;
        color: var(--white) !important;
        cursor: pointer !important;
        padding: 8px !important;
        border-radius: 50% !important;
        transition: all 0.3s ease !important;
    }

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

/* ===== SAFE AREA FOR NOTCHED DEVICES ===== */
@media (max-width: 767px) {

    /* Add safe area padding for devices with notches */
    .safe-area-top {
        padding-top: env(safe-area-inset-top) !important;
    }

    .safe-area-bottom {
        padding-bottom: env(safe-area-inset-bottom) !important;
    }

    .safe-area-left {
        padding-left: env(safe-area-inset-left) !important;
    }

    .safe-area-right {
        padding-right: env(safe-area-inset-right) !important;
    }

    /* Apply safe areas to key elements */
    header {
        padding-top: calc(12px + env(safe-area-inset-top)) !important;
    }

    nav {
        padding-top: env(safe-area-inset-top) !important;
    }

    .mobile-menu {
        padding-top: env(safe-area-inset-top) !important;
    }
}

/* ===== TOUCH OPTIMIZATIONS ===== */
@media (max-width: 767px) {

    /* Increase touch targets */
    .book-card {
        min-height: 44px !important;
    }

    .btn,
    button,
    .mobile-menu-btn,
    .theme-toggle-btn {
        min-height: 44px !important;
        min-width: 44px !important;
    }

    /* Remove hover effects on touch devices */
    @media (hover: none) {
        .book-card:hover {
            transform: none !important;
        }

        .btn:hover {
            transform: none !important;
        }
    }

    /* Add active states for touch */
    .book-card:active {
        transform: scale(0.98) !important;
        transition: transform 0.1s ease !important;
    }

    .btn:active {
        transform: scale(0.95) !important;
        transition: transform 0.1s ease !important;
    }
}

/* ===== ORIENTATION ADJUSTMENTS ===== */
@media (max-width: 767px) and (orientation: landscape) {

    /* Landscape optimizations */
    header {
        height: 50px !important;
        min-height: 50px !important;
        padding: 8px 16px !important;
    }

    header h1 {
        font-size: 1rem !important;
    }

    nav {
        padding: 4px 0 !important;
    }

    .book-card {
        width: 110px !important;
        min-width: 110px !important;
    }

    .book-cover {
        width: 110px !important;
        height: 147px !important;
    }
}

/* ===== HIGH DPI/RETINA DISPLAYS ===== */
@media (-webkit-min-device-pixel-ratio: 2),
(min-resolution: 192dpi) {

    .book-card,
    .cover-image {
        image-rendering: -webkit-optimize-contrast !important;
        image-rendering: crisp-edges !important;
    }
}

/* ===== REDUCED MOTION ===== */
@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* ===== MODAL & AUDIO PLAYER RESPONSIVENESS FIXES ===== */
@media (max-width: 767px) {
    .modal-content {
        margin: 10px auto !important;
        padding: 15px 10px !important;
        width: 96% !important;
        max-width: 96% !important;
        border-radius: 20px !important;
    }

    #audioPlayerModal .modal-content {
        max-height: 95vh !important;
        overflow-y: auto !important;
    }

    #audioPlayerCover {
        max-width: 140px !important;
        width: 100% !important;
        height: auto !important;
        margin: 10px 0 !important;
    }

    #audioPlayer {
        filter: none !important;
        accent-color: var(--primary-color) !important;
        height: 54px !important;
        width: 100% !important;
        display: block !important;
        background: transparent !important;
    }

    #enhancedAudioPlayer {
        padding: 0 !important;
        margin: 10px 0 !important;
        border: none !important;
        background: transparent !important;
    }

    /* Smaller buttons for the skip controls to fit on one or two lines better */
    #enhancedAudioPlayer button {
        padding: 6px 10px !important;
        font-size: 0.8rem !important;
    }

    /* Adjust bookmarks list height for mobile */
    #bookmarksList {
        max-height: 120px !important;
    }

    /* Mini player improvements */
    #miniPlayer {
        padding: 6px 0 !important;
    }

    .mini-player-content {
        padding: 0 12px !important;
    }

    .mini-player-cover {
        width: 40px !important;
        height: 40px !important;
        margin-right: 10px !important;
    }

    .mini-player-title {
        font-size: 0.85rem !important;
    }

    .mini-player-controls {
        gap: 8px !important;
        display: flex !important;
        align-items: center !important;
    }

    .mini-player-btn {
        font-size: 1rem !important;
        padding: 4px !important;
        min-width: 30px !important;
        min-height: 30px !important;
        display: flex !important;
        align-items: center !important;
        justify-content: center !important;
    }

    .mini-player-btn.play-pause {
        width: 34px !important;
        height: 34px !important;
        min-width: 34px !important;
        min-height: 34px !important;
    }
}

/* ===== SYNC & SAVE MODAL RESPONSIVENESS ===== */
@media (max-width: 767px) {
    #syncCodeModal .modal-content {
        padding: 25px 15px !important;
    }

    #syncCodeModal h2 {
        font-size: 1.4rem !important;
        margin-bottom: 10px !important;
    }

    #syncCodeModal p {
        font-size: 0.85rem !important;
        margin-bottom: 20px !important;
    }

    #syncCodeModal .modal-content>div {
        flex-direction: column !important;
        gap: 10px !important;
    }

    #syncCodeModal button {
        width: 100% !important;
        padding: 12px 15px !important;
        font-size: 0.9rem !important;
    }

    #codeInput {
        width: 100% !important;
        font-size: 1.1rem !important;
        letter-spacing: 1px !important;
    }

    /* Restore/Save Over buttons container */
    #codeInputSection>div {
        flex-direction: row !important;
        gap: 10px !important;
        justify-content: center !important;
    }

    #generatedCode {
        font-size: 1.5rem !important;
        padding: 10px !important;
        letter-spacing: 3px !important;
        max-width: 100% !important;
    }

    /* Target the copy/screenshot buttons container explicitly */
    #generatedCodeSection>div:last-of-type {
        flex-direction: row !important;
        justify-content: center !important;
        flex-wrap: wrap !important;
    }
}