/* 
 * Mobile Optimization & Responsive Design
 * Touch-friendly, mobile-first enhancements
 */

/* ============================================
   MOBILE TOUCH TARGETS (44px minimum)
   ============================================ */

@media (max-width: 768px) {
    /* Buttons - Minimum 48px for better touch */
    button,
    .btn,
    input[type="submit"],
    input[type="button"],
    a.button {
        min-height: 48px !important;
        padding: 14px 24px !important;
        font-size: 16px !important; /* Prevents iOS zoom */
    }
    
    /* Form Inputs - Prevent zoom on iOS */
    input[type="text"],
    input[type="email"],
    input[type="password"],
    input[type="number"],
    input[type="tel"],
    select,
    textarea {
        min-height: 48px !important;
        padding: 14px 16px !important;
        font-size: 16px !important; /* Critical: prevents iOS zoom */
    }
    
    /* Links - Increase tap area */
    a {
        padding: 8px 4px;
        margin: -8px -4px;
    }
    
    /* Navigation Links */
    nav a,
    .nav-link {
        min-height: 48px;
        display: flex;
        align-items: center;
        padding: 12px 16px;
    }
    
    /* Icon Buttons */
    .icon-button {
        min-width: 48px;
        min-height: 48px;
        padding: 12px;
    }
}

/* ============================================
   MOBILE NAVIGATION
   ============================================ */

@media (max-width: 768px) {
    /* Header adjustments */
    header {
        padding: 16px 5% !important;
    }
    
    .logo {
        font-size: 20px !important;
    }
    
    /* Mobile menu button */
    .mobile-menu-btn {
        display: block;
        min-width: 48px;
        min-height: 48px;
        background: rgba(255,255,255,0.05);
        border: none;
        border-radius: 8px;
        color: #fff;
        font-size: 24px;
        cursor: pointer;
    }
    
    /* Mobile navigation */
    .nav-links {
        position: fixed;
        top: 0;
        right: -100%;
        width: 80%;
        max-width: 300px;
        height: 100vh;
        background: #1E1E1E;
        padding: 80px 24px 24px;
        transition: right 0.3s ease;
        z-index: 999;
        box-shadow: -4px 0 24px rgba(0,0,0,0.5);
    }
    
    .nav-links.active {
        right: 0;
    }
    
    .nav-links a {
        display: block;
        padding: 16px;
        margin-bottom: 8px;
        border-radius: 8px;
        transition: background 0.2s;
    }
    
    .nav-links a:hover {
        background: rgba(255,255,255,0.05);
    }
    
    /* Mobile overlay */
    .mobile-overlay {
        display: none;
        position: fixed;
        top: 0;
        left: 0;
        width: 100%;
        height: 100%;
        background: rgba(0,0,0,0.7);
        z-index: 998;
    }
    
    .mobile-overlay.active {
        display: block;
    }
}

/* ============================================
   MOBILE TYPOGRAPHY
   ============================================ */

@media (max-width: 768px) {
    h1 {
        font-size: 32px !important;
        line-height: 1.2 !important;
    }
    
    h2 {
        font-size: 28px !important;
        line-height: 1.3 !important;
    }
    
    h3 {
        font-size: 22px !important;
    }
    
    h4 {
        font-size: 18px !important;
    }
    
    p, .text-base {
        font-size: 16px !important;
        line-height: 1.6 !important;
    }
    
    .text-sm {
        font-size: 14px !important;
    }
}

/* ============================================
   MOBILE SPACING
   ============================================ */

@media (max-width: 768px) {
    /* Section padding */
    section {
        padding: 40px 5% !important;
    }
    
    /* Container padding */
    .container {
        padding: 0 5% !important;
    }
    
    /* Card padding */
    .card {
        padding: 20px !important;
    }
    
    /* Modal padding */
    .modal-content {
        padding: 24px !important;
        margin: 16px !important;
    }
}

/* ============================================
   MOBILE MODALS
   ============================================ */

@media (max-width: 768px) {
    .modal-overlay, .redeem-modal {
        padding: 0 !important;
        align-items: flex-end !important;
    }
    
    .modal-content,
    .modal,
    .redeem-content {
        max-height: 85vh !important;
        overflow-y: auto !important;
        border-radius: 16px 16px 0 0 !important;
        margin: 0 !important;
        width: 100% !important;
        max-width: 100% !important;
        animation: slideUp 0.3s ease;
        padding: 24px !important;
    }
    
    @keyframes slideUp {
        from {
            transform: translateY(100%);
        }
        to {
            transform: translateY(0);
        }
    }
    
    .modal-title {
        font-size: 20px !important;
    }
    
    .modal-close {
        width: 40px;
        height: 40px;
        top: 16px;
        right: 16px;
    }
}

/* ============================================
   MOBILE GRIDS
   ============================================ */

@media (max-width: 768px) {
    /* Feature grids */
    .feature-grid,
    .pricing-grid,
    .card-grid {
        grid-template-columns: 1fr !important;
        gap: 20px !important;
    }
    
    /* 2-column grids */
    .grid-2 {
        grid-template-columns: 1fr !important;
    }
    
    /* 3-column grids */
    .grid-3 {
        grid-template-columns: 1fr !important;
    }
}

/* ============================================
   MOBILE TABLES
   ============================================ */

@media (max-width: 768px) {
    table {
        display: block;
        overflow-x: auto;
        -webkit-overflow-scrolling: touch;
    }
    
    /* Card-style tables for mobile */
    .table-mobile-cards {
        display: block;
    }
    
    .table-mobile-cards thead {
        display: none;
    }
    
    .table-mobile-cards tr {
        display: block;
        margin-bottom: 16px;
        background: rgba(255,255,255,0.03);
        border-radius: 8px;
        padding: 16px;
    }
    
    .table-mobile-cards td {
        display: flex;
        justify-content: space-between;
        padding: 8px 0;
        border: none;
    }
    
    .table-mobile-cards td:before {
        content: attr(data-label);
        font-weight: 600;
        color: #A1A1A1;
    }
}

/* ============================================
   MOBILE FORMS
   ============================================ */

@media (max-width: 768px) {
    .form-row {
        flex-direction: column !important;
        gap: 16px !important;
    }
    
    .form-group {
        margin-bottom: 20px !important;
    }
    
    /* Full width buttons on mobile */
    .form-actions {
        flex-direction: column !important;
    }
    
    .form-actions button {
        width: 100% !important;
    }
}

/* ============================================
   MOBILE HERO SECTIONS
   ============================================ */

@media (max-width: 768px) {
    .hero {
        padding: 60px 5% !important;
        text-align: center !important;
    }
    
    .hero h1 {
        font-size: 36px !important;
    }
    
    .hero p {
        font-size: 16px !important;
    }
    
    .hero-buttons {
        flex-direction: column !important;
        gap: 12px !important;
    }
    
    .hero-buttons button {
        width: 100% !important;
    }
}

/* ============================================
   MOBILE PRICING CARDS
   ============================================ */

@media (max-width: 768px) {
    .pricing-card {
        margin-bottom: 24px;
    }
    
    .price {
        font-size: 40px !important;
    }
    
    .pricing-features {
        text-align: left;
    }
}

/* ============================================
   MOBILE FOOTER
   ============================================ */

@media (max-width: 768px) {
    footer {
        padding: 40px 5% !important;
    }
    
    .footer-grid {
        grid-template-columns: 1fr !important;
        gap: 32px !important;
    }
    
    .footer-col {
        text-align: center;
    }
}

/* ============================================
   MOBILE UTILITIES
   ============================================ */

@media (max-width: 768px) {
    /* Hide on mobile */
    .hide-mobile {
        display: none !important;
    }
    
    /* Show only on mobile */
    .show-mobile {
        display: block !important;
    }
    
    /* Stack on mobile */
    .stack-mobile {
        flex-direction: column !important;
    }
    
    /* Full width on mobile */
    .full-width-mobile {
        width: 100% !important;
    }
    
    /* Center on mobile */
    .center-mobile {
        text-align: center !important;
        justify-content: center !important;
    }
}

/* ============================================
   TOUCH OPTIMIZATIONS
   ============================================ */

/* Remove hover effects on touch devices */
@media (hover: none) {
    *:hover {
        /* Disable problematic hover states */
    }
    
    /* Use active states instead */
    button:active,
    .btn:active {
        transform: scale(0.98);
        opacity: 0.9;
    }
}

/* Improve scrolling on iOS */
* {
    -webkit-overflow-scrolling: touch;
}

/* Prevent text selection on buttons */
button,
.btn,
a {
    -webkit-tap-highlight-color: rgba(254, 44, 85, 0.2);
    -webkit-touch-callout: none;
    user-select: none;
}

/* Allow text selection in inputs */
input,
textarea {
    -webkit-user-select: text;
    user-select: text;
}

/* ============================================
   LANDSCAPE ORIENTATION
   ============================================ */

@media (max-width: 768px) and (orientation: landscape) {
    .modal-content {
        max-height: 70vh;
    }
    
    .hero {
        padding: 40px 5% !important;
    }
}

/* ============================================
   SMALL PHONES (< 375px)
   ============================================ */

@media (max-width: 375px) {
    h1 {
        font-size: 28px !important;
    }
    
    h2 {
        font-size: 24px !important;
    }
    
    .btn {
        padding: 12px 20px !important;
    }
    
    .card {
        padding: 16px !important;
    }
}

/* ============================================
   TABLET (768px - 1024px)
   ============================================ */

@media (min-width: 769px) and (max-width: 1024px) {
    .container {
        padding: 0 6%;
    }
    
    .grid-3 {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .hero h1 {
        font-size: 48px;
    }
}

/* ============================================
   ACCESSIBILITY IMPROVEMENTS
   ============================================ */

/* Focus states for keyboard navigation */
*:focus-visible {
    outline: 2px solid #FE2C55;
    outline-offset: 2px;
}

/* Skip to main content link */
.skip-to-main {
    position: absolute;
    top: -100px;
    left: 0;
    background: #FE2C55;
    color: #fff;
    padding: 12px 24px;
    text-decoration: none;
    z-index: 10000;
}

.skip-to-main:focus {
    top: 0;
}

/* Reduced motion for users who prefer it */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* ============================================
   COIN PURCHASE PAGE - MOBILE RESPONSIVE
   ============================================ */

@media (max-width: 768px) {
    /* Main heading */
    h1 {
        font-size: 28px !important;
        margin-bottom: 16px !important;
        padding: 0 8px !important;
    }
    
    h2 {
        font-size: 22px !important;
        margin-bottom: 12px !important;
        padding: 0 8px !important;
    }
    
    /* Main content area - minimal padding */
    main {
        padding: 16px 8px 100px 8px !important;
    }
    
    /* Coin Grid - 2 columns on mobile with minimal padding */
    .coin-grid {
        display: grid !important;
        grid-template-columns: repeat(2, 1fr) !important;
        gap: 10px !important;
        margin-bottom: 20px !important;
        padding: 0 !important;
    }
    
    /* Coin Cards */
    .coin-card {
        padding: 16px 12px !important;
        min-height: 100px !important;
        border-radius: 12px !important;
    }
    
    .coin-count {
        font-size: 16px !important;
        margin-bottom: 8px !important;
    }
    
    .coin-price {
        font-size: 15px !important;
    }
    
    /* Custom coin card (full width) */
    .coin-card.custom {
        grid-column: span 1 !important;
    }
    
    /* Force all coin options to single column */
    .coin-option,
    .coin-option.custom,
    .coin-card,
    .coin-card.custom {
        grid-column: span 1 !important;
        width: 100% !important;
        max-width: none !important;
    }
    
    /* User verification section - minimal padding */
    .user-verify-section {
        padding: 0 8px 16px 8px !important;
        margin-bottom: 8px !important;
    }
    
    section {
        margin-bottom: 0 !important;
    }
    
    .user-verify {
        flex-direction: column !important;
        gap: 12px !important;
        max-width: 100% !important;
    }
    
    /* User input group - FORCE vertical stacking */
    .user-verify-input-group {
        display: flex !important;
        flex-direction: column !important;
        gap: 12px !important;
        width: 100% !important;
    }
    
    /* Input field - REDUCED vertical padding */
    .user-input {
        width: 100% !important;
        font-size: 16px !important;
        padding: 10px 12px !important;
        min-height: 44px !important;
        box-sizing: border-box !important;
    }
    
    .btn-primary {
        width: 100% !important;
        min-height: 48px !important;
        font-size: 16px !important;
        padding: 12px 20px !important;
        box-sizing: border-box !important;
    }
    
    /* Search button specific - FORCE full width */
    #searchBtn {
        width: 100% !important;
        display: block !important;
    }
    
    /* Total Bar - Mobile optimized */
    .total-bar {
        padding: 16px 8px !important;
        flex-direction: row !important;
        justify-content: space-between !important;
        gap: 16px !important;
    }
    
    .total-text {
        font-size: 16px !important;
    }
    
    .total-amount {
        font-size: 18px !important;
    }
    
    #rechargeBtn {
        min-width: 120px !important;
        padding: 12px 20px !important;
    }
    
    /* User search result */
    .user-search-result {
        flex-direction: column !important;
        text-align: center !important;
        padding: 20px !important;
    }
    
    .search-avatar {
        width: 60px !important;
        height: 60px !important;
        margin-bottom: 12px !important;
    }
    
    .search-info {
        margin-bottom: 16px !important;
    }
    
    .btn-connect {
        width: 100% !important;
    }
    
    /* Verified state */
    .verified-state {
        flex-direction: column !important;
        text-align: center !important;
        padding: 16px !important;
        gap: 12px !important;
    }
    
    .verified-state > div:first-child {
        flex-direction: column !important;
        text-align: center !important;
    }
    
    .verified-state button {
        width: 100% !important;
    }
}

/* Small phones - Single column for coins */
@media (max-width: 375px) {
    .coin-grid {
        grid-template-columns: 1fr !important;
        gap: 10px !important;
    }
    
    .coin-card {
        padding: 18px 16px !important;
    }
    
    .coin-count {
        font-size: 18px !important;
    }
    
    .coin-price {
        font-size: 16px !important;
    }
    
    h1 {
        font-size: 24px !important;
    }
    
    h2 {
        font-size: 20px !important;
    }
}

/* Landscape mode on mobile */
@media (max-width: 768px) and (orientation: landscape) {
    .coin-grid {
        grid-template-columns: repeat(3, 1fr) !important;
    }
    
    main {
        padding-bottom: 80px !important;
    }
}