/* ============================================
   Mobile & Responsive Styles
   ============================================ */

/* Base mobile optimizations (applies to all devices) */
@media (max-width: 768px) {
  :root {
    /* Increase font sizes for readability on mobile */
    --font-size-base: 16px;
    --font-size-lg: 18px;
    --font-size-xl: 20px;
    --font-size-2xl: 24px;

    /* Increase spacing for touch targets */
    --spacing-md: 16px;
    --spacing-lg: 20px;
  }

  body {
    -webkit-font-smoothing: antialiased;
    -webkit-text-size-adjust: 100%;
    /* Prevent zoom on input focus */
    font-size: 16px;
  }

  /* Prevent layout shift from scrollbar */
  html {
    overflow-y: scroll;
  }

  /* App layout */
  .app {
    max-width: 100%;
  }

  /* Screen base */
  .screen {
    max-width: 100%;
  }

  /* Welcome Screen Mobile */
  .welcome-screen {
    padding: var(--spacing-md);
  }

  .welcome-container {
    max-width: 100%;
  }

  .welcome-header h1 {
    font-size: 28px;
  }

  .car-emoji {
    font-size: 60px;
  }

  .welcome-form,
  .welcome-features {
    border-radius: var(--radius-lg);
  }

  .form-group input {
    font-size: 16px; /* Prevents zoom on focus in Safari */
    padding: var(--spacing-md) var(--spacing-md);
    min-height: 44px; /* Minimum touch target */
  }

  /* Dashboard Mobile */
  .dashboard-main {
    padding: var(--spacing-md);
  }

  .stats-grid {
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-md);
  }

  .stat-card {
    padding: var(--spacing-md);
  }

  .stat-value {
    font-size: 24px;
  }

  /* Buttons mobile */
  .btn {
    min-height: 48px;
    font-size: 16px;
    border-radius: var(--radius-lg);
    padding: var(--spacing-md) var(--spacing-lg);
  }

  .btn-large {
    width: 100%;
    margin-bottom: var(--spacing-md);
  }

  .btn:active {
    transform: scale(0.98);
  }

  /* Practice Test Mobile */
  .test-header {
    padding: var(--spacing-md);
    position: sticky;
    top: 0;
    z-index: 100;
  }

  .test-progress {
    display: flex;
    justify-content: space-between;
    gap: var(--spacing-sm);
  }

  .test-main {
    padding: var(--spacing-md);
  }

  .question-text {
    font-size: 18px;
    line-height: 1.6;
  }

  .options-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-md);
  }

  .answer-option {
    min-height: 56px;
    padding: var(--spacing-md);
    font-size: 16px;
    border-radius: var(--radius-lg);
  }

  .answer-option:active:not(:disabled) {
    background-color: rgba(33, 150, 243, 0.1);
  }

  .feedback-container {
    margin-bottom: var(--spacing-lg);
    padding: var(--spacing-md);
  }

  .explanation {
    font-size: 14px;
  }

  /* Results mobile */
  .results-summary {
    grid-template-columns: 1fr;
    gap: var(--spacing-lg);
  }

  .score-circle {
    width: 120px;
    height: 120px;
    margin: 0 auto;
  }

  .score-percentage {
    font-size: 28px;
  }

  .category-breakdown {
    display: grid;
    grid-template-columns: 1fr;
  }

  .category-result {
    padding: var(--spacing-md);
  }

  /* Settings mobile */
  .settings-main {
    padding: var(--spacing-md);
  }

  .settings-section {
    margin-bottom: var(--spacing-lg);
  }

  .settings-section input,
  .settings-section textarea {
    font-size: 16px; /* Prevent zoom */
    min-height: 44px;
  }

  /* Touch-friendly tap feedback */
  button,
  .answer-option,
  .stat-card {
    -webkit-tap-highlight-color: rgba(0, 0, 0, 0.1);
  }

  /* Hide scrollbar decorations on smaller screens */
  ::-webkit-scrollbar {
    width: 6px;
  }

  ::-webkit-scrollbar-track {
    background: transparent;
  }

  ::-webkit-scrollbar-thumb {
    background: rgba(0, 0, 0, 0.3);
    border-radius: 3px;
  }

  ::-webkit-scrollbar-thumb:hover {
    background: rgba(0, 0, 0, 0.5);
  }

  /* Safe area insets for notched devices */
  body {
    padding-left: max(0px, env(safe-area-inset-left));
    padding-right: max(0px, env(safe-area-inset-right));
    padding-top: max(0px, env(safe-area-inset-top));
    padding-bottom: max(0px, env(safe-area-inset-bottom));
  }

  /* Status bar compensation */
  .dashboard-header,
  .test-header,
  .settings-header {
    padding-top: max(var(--spacing-lg), env(safe-area-inset-top));
  }
}

/* Small phones (320px - 480px) */
@media (max-width: 480px) {
  :root {
    --font-size-3xl: 24px;
    --spacing-lg: 16px;
  }

  .welcome-header h1 {
    font-size: 24px;
  }

  .welcome-header p {
    font-size: 14px;
  }

  .car-emoji {
    font-size: 50px;
  }

  .stats-grid {
    grid-template-columns: 1fr;
  }

  .question-text {
    font-size: 16px;
  }

  .score-circle {
    width: 100px;
    height: 100px;
  }

  .score-percentage {
    font-size: 24px;
  }

  .score-text {
    font-size: 11px;
  }

  .btn-icon {
    font-size: 20px;
  }

  .progress-bar-bg {
    height: 6px;
  }

  .category-badge {
    font-size: 11px;
    padding: var(--spacing-sm) var(--spacing-md);
  }
}

/* Medium phones / Tablets (768px - 1024px) */
@media (min-width: 481px) and (max-width: 1024px) {
  .stats-grid {
    grid-template-columns: 1fr 1fr;
  }

  .category-stats-grid {
    grid-template-columns: 1fr;
  }

  .options-grid {
    grid-template-columns: 1fr;
  }

  .question-text {
    font-size: 18px;
  }
}

/* Large tablets / Desktop */
@media (min-width: 1025px) {
  .dashboard-main {
    max-width: 1200px;
    margin: 0 auto;
  }

  .test-main {
    max-width: 800px;
    margin: 0 auto;
  }

  .settings-main {
    max-width: 600px;
    margin: 0 auto;
  }

  .stats-grid {
    grid-template-columns: 1fr 1fr 1fr 1fr;
  }

  .results-summary {
    grid-template-columns: 1fr 1fr;
  }

  .options-grid {
    grid-template-columns: 1fr;
  }
}

/* ============================================
   Touch Device Optimizations
   ============================================ */
@media (hover: none) and (pointer: coarse) {
  /* Touch devices */

  /* Disable hover effects that don't make sense on touch */
  button:not(:active) {
    background-color: inherit;
  }

  .answer-option {
    border-width: 2px;
  }

  .answer-option:active {
    border-color: var(--primary-color);
    background-color: rgba(33, 150, 243, 0.1);
  }

  /* Increase touch targets */
  button,
  input,
  .answer-option,
  .stat-card {
    min-height: 48px;
    min-width: 48px;
  }

  /* Remove focus outline on touch devices */
  button:focus,
  input:focus,
  .answer-option:focus {
    outline: none;
  }

  /* Use active state instead of hover */
  .btn:hover:not(:disabled) {
    transform: none;
  }

  .btn:active:not(:disabled) {
    transform: scale(0.98);
    box-shadow: inset 0 2px 4px rgba(0, 0, 0, 0.2);
  }
}

/* ============================================
   Landscape Mode
   ============================================ */
@media (max-height: 500px) {
  .dashboard-header h1,
  .complete-header h1,
  .settings-header h1 {
    font-size: 20px;
    margin-bottom: var(--spacing-sm);
  }

  .stats-grid {
    grid-template-columns: 1fr 1fr 1fr 1fr;
    gap: var(--spacing-sm);
  }

  .stat-card {
    padding: var(--spacing-sm);
  }

  .stat-value {
    font-size: 18px;
  }

  .stat-label {
    font-size: 10px;
  }

  .test-main {
    padding: var(--spacing-sm);
  }

  .question-text {
    font-size: 16px;
    margin-bottom: var(--spacing-md);
  }

  .options-grid {
    gap: var(--spacing-sm);
  }

  .answer-option {
    padding: var(--spacing-sm) var(--spacing-md);
    min-height: 40px;
  }

  .btn-large {
    padding: var(--spacing-sm) var(--spacing-md);
    font-size: 14px;
  }
}

/* ============================================
   Orientation Specific
   ============================================ */
@media (orientation: portrait) {
  body {
    overflow-x: hidden;
  }
}

@media (orientation: landscape) {
  .welcome-illustration {
    display: none;
  }

  .welcome-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-lg);
    align-items: center;
  }

  .welcome-header {
    text-align: left;
  }

  .welcome-form,
  .welcome-features {
    margin-bottom: 0;
  }
}

/* ============================================
   High Resolution Displays (Retina)
   ============================================ */
@media (-webkit-min-device-pixel-ratio: 2),
  (min-resolution: 192dpi) {
  button,
  input {
    border-width: 1px;
  }
}

/* ============================================
   Dark Mode Support (Optional)
   ============================================ */
@media (prefers-color-scheme: dark) {
  /* Future dark mode support can be added here */
}

/* ============================================
   Print Styles
   ============================================ */
@media print {
  .dashboard-header,
  .test-header,
  .settings-header,
  .btn-icon {
    display: none;
  }

  .screen {
    page-break-after: always;
  }

  body {
    background: white;
    color: black;
  }
}