/* ============================================
   UNIVERSAL MOBILE BROWSER FIXES
   Cross-browser compatibility: iOS Safari, Android Chrome/Brave
   ============================================ */

/* Base text rendering for all browsers */
html {
  -webkit-text-size-adjust: 100%;
  -ms-text-size-adjust: 100%;
  text-size-adjust: 100%;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* Mobile-specific fixes */
@media screen and (max-width: 768px) {
  /* Fix viewport height across all mobile browsers */
  html {
    height: 100%;
    height: -webkit-fill-available;
  }
  
  body {
    min-height: 100vh;
    min-height: -webkit-fill-available;
    overflow-x: hidden;
    width: 100%;
  }
  
  /* Prevent horizontal overflow */
  .container,
  main,
  section {
    max-width: 100vw;
    overflow-x: hidden;
    box-sizing: border-box;
  }
  
  /* Fix flex items */
  .card,
  .metric-card,
  .partner-card,
  .data-card {
    flex-shrink: 0;
    min-width: 0;
    box-sizing: border-box;
    -webkit-transform: translateZ(0);
    transform: translateZ(0);
  }
  
  /* Media elements */
  img,
  canvas,
  svg,
  video {
    max-width: 100%;
    height: auto;
    display: block;
  }
  
  /* Chart fixes for all browsers */
  .chart-container,
  .chart-wrapper {
    position: relative;
    width: 100%;
    max-width: 100%;
    overflow: hidden;
    -webkit-transform: translateZ(0);
    transform: translateZ(0);
  }
  
  .chart-container canvas,
  canvas {
    max-width: 100%;
    height: auto;
    -webkit-transform: translateZ(0);
    transform: translateZ(0);
  }
  
  /* CRITICAL: Prevent auto-zoom on input focus (iOS Safari & Android Chrome) */
  input[type="text"],
  input[type="email"],
  input[type="password"],
  input[type="number"],
  input[type="tel"],
  input[type="search"],
  select,
  textarea {
    font-size: 16px;
    -webkit-appearance: none;
    -moz-appearance: none;
    appearance: none;
  }
  
  /* Custom select dropdown arrow */
  select {
    background-image: url("data:image/svg+xml;charset=UTF-8,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='currentColor' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3e%3cpolyline points='6 9 12 15 18 9'%3e%3c/polyline%3e%3c/svg%3e");
    background-repeat: no-repeat;
    background-position: right 10px center;
    background-size: 20px;
    padding-right: 35px;
  }
  
  /* Button fixes */
  button,
  .btn,
  .btn-primary,
  .btn-secondary {
    -webkit-appearance: none;
    -moz-appearance: none;
    appearance: none;
    -webkit-transform: translateZ(0);
    transform: translateZ(0);
  }
  
  /* Table responsive behavior */
  table {
    width: 100%;
    max-width: 100%;
    table-layout: fixed;
  }
  
  table td,
  table th {
    word-wrap: break-word;
    overflow-wrap: break-word;
  }
  
  /* QR Scanner fixes */
  #qr-reader,
  #qr-reader video,
  #qr-reader__scan_region,
  #video-container,
  #video,
  #canvas {
    width: 100%;
    max-width: 100%;
    -webkit-transform: translateZ(0);
    transform: translateZ(0);
  }
  
  /* Modal positioning */
  .modal {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    width: 100vw;
    height: 100vh;
    overflow-y: auto;
    -webkit-overflow-scrolling: touch;
  }
  
  .modal-content {
    margin: 20px auto;
    max-width: 90vw;
  }
  
  /* Grid layouts */
  .metrics-grid,
  .card-grid,
  .stats-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 15px;
    width: 100%;
  }
  
  /* Accordion specific fixes */
  .accordion-content {
    transition: max-height 0.3s ease-in-out;
    overflow: hidden;
    width: 100%;
    -webkit-overflow-scrolling: touch;
  }
  
  .accordion-toggle {
    display: flex;
    align-items: center;
    justify-content: space-between;
    width: 100%;
    text-align: left;
  }
  
  .protocol-details-container {
    width: 100%;
    -webkit-transform: translateZ(0);
    transform: translateZ(0);
  }
  
  .protocol-item {
    display: grid;
    grid-template-columns: 1fr;
    gap: 12px;
    -webkit-transform: translateZ(0);
    transform: translateZ(0);
  }
  
  /* Remove tap highlight */
  * {
    -webkit-tap-highlight-color: rgba(0,0,0,0);
    -webkit-tap-highlight-color: transparent;
  }
  
  /* Sticky header */
  header,
  .header-sticky {
    position: -webkit-sticky;
    position: sticky;
    top: 0;
    z-index: 100;
  }
  
  /* Smooth momentum scrolling */
  body,
  .modal,
  .accordion-content {
    -webkit-overflow-scrolling: touch;
  }
  
  /* Hardware acceleration for smooth rendering */
  .metric-card,
  .card,
  section,
  .scanner-section {
    -webkit-backface-visibility: hidden;
    backface-visibility: hidden;
    -webkit-perspective: 1000px;
    perspective: 1000px;
  }
}

/* iOS Safari specific fixes */
@supports (-webkit-touch-callout: none) {
  @media screen and (max-width: 768px) {
    /* Fix iOS Safari bottom bar issue */
    body {
      min-height: -webkit-fill-available;
    }
    
    /* Fix iOS input styling */
    input,
    textarea,
    select {
      border-radius: 0;
    }
    
    /* Fix iOS button styling */
    button {
      cursor: pointer;
    }
  }
}

/* Android Chrome/Brave specific fixes */
@supports not (-webkit-touch-callout: none) {
  @media screen and (max-width: 768px) {
    /* Android Chrome viewport fix */
    html {
      height: 100%;
    }
    
    /* Android form autofill background */
    input:-webkit-autofill,
    input:-webkit-autofill:hover,
    input:-webkit-autofill:focus {
      -webkit-box-shadow: 0 0 0px 1000px white inset;
      transition: background-color 5000s ease-in-out 0s;
    }
  }
}

/* Landscape mode optimizations */
@media screen and (max-width: 768px) and (orientation: landscape) {
  .protocol-item {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .metrics-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

/* Small mobile devices (portrait) */
@media screen and (max-width: 480px) and (orientation: portrait) {
  .protocol-item,
  .metrics-grid,
  .card-grid {
    grid-template-columns: 1fr;
  }
  
  /* Smaller spacing on small screens */
  .container {
    padding-left: 12px;
    padding-right: 12px;
  }
}