/*
 * Enhanced Mobile Responsive CSS for Topup Section
 * Targeted mobile optimizations following Option 2 approach
 * Non-invasive improvements to existing topup_section.phtml CSS
 */

/* ========================================
   MOBILE-FIRST CSS VARIABLES & UTILITIES
   ======================================== */
:root {
  /* Mobile-optimized spacing */
  --mobile-xs: 6px;
  --mobile-sm: 8px;
  --mobile-md: 12px;
  --mobile-lg: 16px;
  --mobile-xl: 20px;
  
  /* Fluid typography scales */
  --fluid-12-14: clamp(12px, 2.5vw, 14px);
  --fluid-14-16: clamp(14px, 3vw, 16px);
  --fluid-16-18: clamp(16px, 3.5vw, 18px);
  --fluid-18-20: clamp(18px, 4vw, 20px);
  --fluid-20-24: clamp(20px, 4.5vw, 24px);
  --fluid-24-28: clamp(24px, 5vw, 28px);
  --fluid-28-32: clamp(28px, 5.5vw, 32px);
  --fluid-32-36: clamp(32px, 6vw, 36px);
  
  /* Mobile-appropriate border radius */
  --mobile-radius-sm: 8px;
  --mobile-radius-md: 12px;
  --mobile-radius-lg: 16px;
}

/* ========================================
   ENHANCED MOBILE RESPONSIVENESS
   ======================================== */

/* Large Tablets (769px - 992px) */
@media (max-width: 992px) {
  .topup-grid-container {
    padding: 0 var(--mobile-lg);
    margin: var(--mobile-lg) auto;
  }
  
  .grid-3-column {
    gap: var(--mobile-xl);
  }
  
  /* Ensure images scale properly */
  .column-bank-transfer,
  .column-scratch-card {
    height: clamp(280px, 35vw, 350px) !important;
    width: 100% !important;
  }
  
  .column-leaderboard {
    height: clamp(320px, 40vw, 400px) !important;
    width: 100% !important;
  }
  
  .leaderboard-title {
    font-size: var(--fluid-28-32) !important;
  }
}

/* Mobile Landscape (577px - 768px) */
@media (max-width: 768px) {
  .topup-grid-container {
    padding: 0 var(--mobile-md);
    margin: var(--mobile-md) auto;
  }
  
  .grid-3-column {
    grid-template-columns: 1fr !important;
    gap: var(--mobile-lg);
  }
  
  .grid-column {
    padding: var(--mobile-lg);
    min-height: clamp(250px, 50vw, 350px);
  }
  
  /* Image columns optimization */
  .column-bank-transfer,
  .column-scratch-card {
    height: clamp(200px, 45vw, 280px) !important;
    width: 100% !important;
    border-radius: var(--mobile-radius-md);
  }
  
  /* Leaderboard optimization */
  .column-leaderboard {
    height: auto !important;
    min-height: clamp(300px, 60vw, 400px) !important;
    width: 100% !important;
    border-radius: var(--mobile-radius-md);
  }
  
  /* Header optimization */
  .leaderboard-title {
    font-size: var(--fluid-24-28) !important;
    margin-top: -10px;
  }
  
  .leaderboard-content {
    padding: var(--mobile-lg);
  }
  
  /* Tab navigation enhancement */
  .tab-btn {
    padding: var(--mobile-sm) var(--mobile-lg) !important;
    font-size: var(--fluid-14-16) !important;
    min-height: 48px; /* Touch-friendly */
  }
  
  /* User list improvements */
  .user-item {
    padding: var(--mobile-sm) var(--mobile-lg) !important;
    margin-bottom: var(--mobile-sm);
    min-height: 50px; /* Touch-friendly */
  }
  
  .user-rank {
    width: 32px !important;
    height: 32px !important;
    font-size: var(--fluid-12-14) !important;
    margin-right: var(--mobile-md);
  }
  
  .user-name {
    font-size: var(--fluid-14-16) !important;
  }
  
  .user-amount {
    padding: var(--mobile-xs) var(--mobile-md) !important;
    font-size: var(--fluid-12-14) !important;
    min-width: 80px;
    border-radius: var(--mobile-radius-sm);
  }
}

/* Mobile Portrait (481px - 576px) */
@media (max-width: 576px) {
  .topup-grid-container {
    padding: 0 var(--mobile-sm);
    margin: var(--mobile-sm) auto;
  }
  
  .grid-3-column {
    gap: var(--mobile-md);
  }
  
  .grid-column {
    padding: var(--mobile-lg);
    border-radius: var(--mobile-radius-lg);
  }
  
  /* Image columns for portrait */
  .column-bank-transfer,
  .column-scratch-card {
    height: clamp(180px, 50vw, 240px) !important;
    width: 100% !important;
  }
  
  .column-leaderboard {
    min-height: clamp(280px, 65vw, 350px) !important;
    width: 100% !important;
  }
  
  /* Typography scaling */
  .leaderboard-title {
    font-size: var(--fluid-20-24) !important;
  }
  
  .leaderboard-header {
    padding: var(--mobile-sm);
  }
  
  .leaderboard-content {
    padding: var(--mobile-md);
  }
  
  /* Tab navigation */
  .tab-nav {
    margin-bottom: var(--mobile-md);
    border-radius: var(--mobile-radius-sm);
    height: 48px;
  }
  
  .tab-btn {
    padding: var(--mobile-xs) var(--mobile-md) !important;
    font-size: var(--fluid-13-15) !important;
    min-height: 44px; /* Apple's recommended touch target */
  }
  
  .tab-btn.active {
    padding-bottom: calc(var(--mobile-xs) + 2px) !important;
  }
  
  /* User items */
  .user-item {
    padding: var(--mobile-sm) var(--mobile-md) !important;
    border-radius: var(--mobile-radius-sm);
    min-height: 48px;
  }
  
  .user-rank {
    width: 28px !important;
    height: 28px !important;
    font-size: var(--fluid-11-13) !important;
    margin-right: var(--mobile-sm);
  }
  
  .user-name {
    font-size: var(--fluid-13-15) !important;
  }
  
  .user-amount {
    padding: var(--mobile-xs) var(--mobile-sm) !important;
    font-size: var(--fluid-11-13) !important;
    min-width: 70px;
  }
}

/* Small Mobile Devices (376px - 480px) */
@media (max-width: 480px) {
  .topup-grid-container {
    padding: 0 var(--mobile-xs);
    margin: var(--mobile-xs) auto;
  }
  
  .grid-3-column {
    gap: var(--mobile-sm);
  }
  
  .grid-column {
    padding: var(--mobile-md);
    border-radius: var(--mobile-radius-md);
  }
  
  /* Image columns for small screens */
  .column-bank-transfer,
  .column-scratch-card {
    height: clamp(160px, 55vw, 200px) !important;
    width: 100% !important;
  }
  
  .column-leaderboard {
    min-height: clamp(250px, 70vw, 300px) !important;
    width: 100% !important;
  }
  
  /* Typography for small screens */
  .leaderboard-title {
    font-size: var(--fluid-18-22) !important;
    margin-bottom: var(--mobile-sm);
    padding: var(--mobile-lg);
  }
  
  .leaderboard-header {
    padding: var(--mobile-xs);
  }
  
  .leaderboard-content {
    padding: var(--mobile-sm);
  }
  
  /* Tab navigation for small screens */
  .tab-nav {
    margin-bottom: var(--mobile-sm);
    border-radius: var(--mobile-radius-sm);
    height: 44px;
  }
  
  .tab-btn {
    padding: var(--mobile-xs) var(--mobile-sm) !important;
    font-size: var(--fluid-12-14) !important;
    min-height: 40px;
  }
  
  /* User items for small screens */
  .user-item {
    padding: var(--mobile-xs) var(--mobile-sm) !important;
    margin-bottom: var(--mobile-xs);
    min-height: 44px;
  }
  
  .user-rank {
    width: 24px !important;
    height: 24px !important;
    font-size: var(--fluid-10-12) !important;
    margin-right: var(--mobile-xs);
  }
  
  .user-name {
    font-size: var(--fluid-12-14) !important;
  }
  
  .user-amount {
    padding: 2px var(--mobile-xs) !important;
    font-size: var(--fluid-10-12) !important;
    min-width: 60px;
  }
}

/* Extra Small Mobile Devices (≤375px) */
@media (max-width: 375px) {
  .topup-grid-container {
    padding: 0 4px;
    margin: var(--mobile-xs) auto;
  }
  
  .grid-3-column {
    gap: var(--mobile-xs);
  }
  
  .grid-column {
    padding: var(--mobile-sm);
    border-radius: var(--mobile-radius-sm);
  }
  
  /* Image columns for extra small screens */
  .column-bank-transfer,
  .column-scratch-card {
    height: clamp(140px, 60vw, 180px) !important;
    width: 100% !important;
  }
  
  .column-leaderboard {
    min-height: clamp(220px, 75vw, 260px) !important;
    width: 100% !important;
  }
  
  /* Extra small typography */
  .leaderboard-title {
    font-size: var(--fluid-16-20) !important;
  }
  
  .leaderboard-header {
    padding: 3px;
  }
  
  .leaderboard-content {
    padding: var(--mobile-xs);
  }
  
  /* Tab navigation for extra small screens */
  .tab-nav {
    margin-bottom: var(--mobile-xs);
    border-radius: var(--mobile-radius-sm);
    height: 40px;
  }
  
  .tab-btn {
    padding: 2px 6px !important;
    font-size: var(--fluid-11-13) !important;
    min-height: 36px;
  }
  
  /* User items for extra small screens */
  .user-item {
    padding: 4px var(--mobile-xs) !important;
    margin-bottom: 3px;
    min-height: 40px;
  }
  
  .user-rank {
    width: 22px !important;
    height: 22px !important;
    font-size: 10px !important;
    margin-right: 4px;
  }
  
  .user-name {
    font-size: var(--fluid-11-13) !important;
  }
  
  .user-amount {
    padding: 1px 4px !important;
    font-size: 10px !important;
    min-width: 50px;
  }
}

/* ========================================
   TOUCH-FRIENDLY ENHANCEMENTS
   ======================================== */

/* Ensure all interactive elements are touch-friendly */
@media (max-width: 768px) {
  .grid-column {
    cursor: pointer;
    position: relative;
    overflow: hidden;
  }
  
  /* Only add overlay to image columns, not leaderboard column */
  .column-bank-transfer::after,
  .column-scratch-card::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 1;
  }
  
  .tab-btn {
    position: relative;
    z-index: 2;
    user-select: none;
    -webkit-tap-highlight-color: transparent;
  }
  
  .user-item {
    cursor: pointer;
    user-select: none;
    -webkit-tap-highlight-color: transparent;
  }
  
  /* Improve hover states for touch */
  .tab-btn:active,
  .user-item:active {
    transform: scale(0.98);
    transition: transform 0.1s ease;
  }
}

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

/* High contrast mode support */
@media (prefers-contrast: high) {
  .tab-btn.active {
    border: 2px solid currentColor;
  }
  
  .user-amount {
    border: 1px solid rgba(255, 255, 255, 0.3);
  }
}

/* Reduced motion support */
@media (prefers-reduced-motion: reduce) {
  .grid-column,
  .tab-btn,
  .user-item,
  .column-bank-transfer,
  .column-scratch-card {
    transition: none !important;
  }
  
  .grid-column:hover,
  .user-item:hover {
    transform: none !important;
  }
}

/* ========================================
   LANDSCAPE MOBILE OPTIMIZATIONS
   ======================================== */
@media (max-height: 500px) and (orientation: landscape) {
  .topup-grid-container {
    margin: var(--mobile-xs) auto;
  }
  
  .grid-column {
    min-height: 200px;
  }
  
  .leaderboard-title {
    font-size: var(--fluid-16-20) !important;
  }
  
  .tab-nav {
    height: 40px;
  }
  
  .tab-btn {
    min-height: 36px;
    padding: var(--mobile-xs) var(--mobile-sm) !important;
  }
}

/* ========================================
   PREVENTION OF HORIZONTAL SCROLL
   ======================================== */
@media (max-width: 768px) {
  /* Force full width and prevent overflow */
  .topup-grid-container {
    overflow-x: hidden;
  }
  
  .grid-3-column {
    width: 100%;
    max-width: 100%;
  }
  
  .grid-column {
    width: 100% !important;
    max-width: 100%;
    box-sizing: border-box;
  }
  
  /* Ensure no fixed widths cause overflow */
  .column-bank-transfer,
  .column-scratch-card,
  .column-leaderboard {
    width: 100% !important;
    max-width: 100% !important;
  }
}