/**
 * UG2 Portal Mobile Responsive Enhancements
 * Comprehensive mobile-first responsive styles
 * Version: 1.0.0
 */

/* ============================================
   MOBILE-FIRST BASE ADJUSTMENTS
   ============================================ */

/* Prevent horizontal scroll */
html, body {
  overflow-x: hidden;
  -webkit-text-size-adjust: 100%;
}

/* Better touch scrolling */
* {
  -webkit-overflow-scrolling: touch;
}

/* ============================================
   SMALL MOBILE (< 380px)
   ============================================ */
@media (max-width: 380px) {
  /* Extra small screen adjustments */
  body {
    font-size: 14px;
  }

  .login-container,
  .registration-container {
    padding: 24px 16px !important;
    margin: 10px !important;
  }

  .logo h1 {
    font-size: 20px !important;
  }

  .section-title {
    font-size: 18px !important;
  }

  /* OTP inputs on tiny screens */
  .otp-input-group {
    gap: 4px !important;
  }

  .otp-input {
    width: 42px !important;
    height: 42px !important;
    font-size: 16px !important;
  }

  /* Buttons full width */
  .btn {
    padding: 14px 16px !important;
    font-size: 15px !important;
  }

  /* Header adjustments */
  .header {
    padding: 12px 16px !important;
  }

  .header h1 {
    font-size: 18px !important;
  }
}

/* ============================================
   MOBILE (< 480px)
   ============================================ */
@media (max-width: 480px) {
  /* Page containers */
  .main-content {
    padding: 12px !important;
  }

  .controls {
    padding: 16px !important;
  }

  /* Header improvements */
  .header {
    padding: 12px 16px;
  }

  .header-content {
    flex-direction: column;
    gap: 12px;
    align-items: stretch !important;
  }

  .logo {
    justify-content: center;
  }

  .user-info {
    justify-content: space-between;
    width: 100%;
  }

  .welcome-text {
    font-size: 13px !important;
  }

  .logout-btn {
    padding: 10px 16px !important;
    min-height: 44px;
  }

  /* Control rows */
  .controls-row {
    flex-direction: column !important;
    gap: 12px !important;
  }

  .search-input {
    min-width: 100% !important;
    width: 100% !important;
  }

  .filter-select {
    width: 100% !important;
  }

  /* Stats bar */
  .stats-bar {
    flex-wrap: wrap;
    gap: 8px !important;
  }

  .stat-item {
    flex: 1 1 auto;
    min-width: calc(50% - 4px);
    text-align: center;
    padding: 10px 8px !important;
    font-size: 13px !important;
  }

  /* Student cards */
  .students-grid {
    grid-template-columns: 1fr !important;
    gap: 12px !important;
  }

  .student-card {
    min-height: auto !important;
  }

  .card-main-content {
    padding: 16px !important;
  }

  .student-name {
    font-size: 16px !important;
  }

  /* Action buttons in cards */
  .card-actions {
    flex-direction: column;
    gap: 8px;
  }

  .card-actions .btn {
    width: 100%;
  }

  /* Forms */
  .form-group {
    margin-bottom: 16px !important;
  }

  input[type="email"],
  input[type="text"],
  input[type="password"],
  input[type="tel"],
  textarea,
  select {
    font-size: 16px !important; /* Prevents iOS zoom */
    padding: 14px 12px !important;
  }

  /* Login container */
  .login-container {
    padding: 28px 20px !important;
    margin: 16px !important;
    max-width: 100% !important;
  }

  /* Step indicator */
  .step-indicator {
    gap: 8px !important;
    margin-bottom: 24px !important;
  }

  .step {
    width: 28px !important;
    height: 28px !important;
    font-size: 12px !important;
  }

  .step-divider {
    width: 16px !important;
  }

  /* Agent registration section */
  .agent-registration-section {
    padding: 16px !important;
  }

  /* Empty state */
  .empty-state {
    padding: 32px 16px !important;
  }

  .empty-state-icon {
    width: 60px !important;
    height: 60px !important;
    font-size: 28px !important;
  }

  .empty-state h3 {
    font-size: 20px !important;
  }

  .empty-state-description {
    font-size: 14px !important;
  }

  .empty-state-actions {
    flex-direction: column !important;
    gap: 12px !important;
  }

  .empty-state-btn {
    width: 100% !important;
    justify-content: center !important;
  }

  /* Footer */
  .footer {
    font-size: 11px !important;
    padding: 16px !important;
  }
}

/* ============================================
   TABLET (< 768px)
   ============================================ */
@media (max-width: 768px) {
  /* Header */
  .header-content {
    flex-wrap: wrap;
    gap: 12px;
  }

  .header-actions {
    display: flex;
    gap: 8px;
    width: 100%;
    justify-content: flex-end;
  }

  /* Main content */
  .main-content {
    padding: 16px;
  }

  /* Controls */
  .controls-row {
    flex-wrap: wrap;
  }

  .search-input {
    flex: 1 1 200px;
    min-width: 200px;
  }

  /* Grid layouts */
  .students-grid {
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  }

  /* Detail rows in cards */
  .detail-row {
    flex-direction: column;
    gap: 4px;
  }

  .detail-value {
    text-align: left;
    max-width: 100%;
  }

  /* Modal adjustments */
  .modal-content,
  .auth-modal-content {
    width: 95% !important;
    max-width: 450px;
    margin: 16px;
    max-height: 90vh;
    overflow-y: auto;
  }

  /* Forms */
  .form-row {
    flex-direction: column;
    gap: 16px;
  }

  .form-row .form-group {
    width: 100%;
  }

  /* Two column layouts */
  .two-column {
    flex-direction: column;
  }

  /* Profile sections */
  .profile-section {
    padding: 16px;
  }

  /* Timeline */
  .timeline-item {
    padding: 12px;
  }

  /* Tabs */
  .tabs {
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
  }

  .tabs::-webkit-scrollbar {
    display: none;
  }

  .tab {
    flex-shrink: 0;
    padding: 12px 16px;
  }
}

/* ============================================
   LANDSCAPE MOBILE
   ============================================ */
@media (max-width: 768px) and (orientation: landscape) {
  .login-container {
    max-width: 500px !important;
    margin: 16px auto !important;
  }

  .main-content {
    padding: 12px 24px;
  }

  /* Reduce vertical space in landscape */
  .logo {
    margin-bottom: 16px !important;
  }

  .step-indicator {
    margin-bottom: 16px !important;
  }
}

/* ============================================
   TABLET LANDSCAPE & SMALL DESKTOP (768px - 1024px)
   ============================================ */
@media (min-width: 769px) and (max-width: 1024px) {
  .students-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .controls-row {
    flex-wrap: wrap;
  }

  .search-input {
    flex: 1 1 300px;
  }
}

/* ============================================
   TOUCH DEVICE OPTIMIZATIONS
   ============================================ */
@media (hover: none) and (pointer: coarse) {
  /* Larger touch targets */
  .btn,
  button,
  .logout-btn,
  .back-btn,
  .add-student-btn {
    min-height: 48px;
    padding: 12px 20px;
  }

  /* Remove hover effects on touch */
  .student-card:hover {
    transform: none;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
  }

  .btn:hover:not(:disabled) {
    transform: none;
  }

  /* Active states for touch */
  .btn:active:not(:disabled) {
    transform: scale(0.98);
    opacity: 0.9;
  }

  .student-card:active {
    transform: scale(0.99);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
  }

  /* Links need bigger tap areas */
  a {
    display: inline-block;
    padding: 4px 0;
  }

  .resend-link,
  .back-link {
    padding: 12px 8px;
    margin: -12px -8px;
  }

  /* Checkboxes and radio buttons */
  input[type="checkbox"],
  input[type="radio"] {
    width: 24px;
    height: 24px;
  }

  /* Select elements */
  select {
    min-height: 48px;
  }
}

/* ============================================
   SAFE AREA INSETS (for notched phones)
   ============================================ */
@supports (padding: max(0px)) {
  .header {
    padding-left: max(16px, env(safe-area-inset-left));
    padding-right: max(16px, env(safe-area-inset-right));
  }

  .main-content {
    padding-left: max(16px, env(safe-area-inset-left));
    padding-right: max(16px, env(safe-area-inset-right));
    padding-bottom: max(24px, env(safe-area-inset-bottom));
  }

  .footer {
    padding-bottom: max(16px, env(safe-area-inset-bottom));
  }

  /* Fixed bottom elements */
  .fixed-bottom-bar {
    padding-bottom: max(16px, env(safe-area-inset-bottom));
  }
}

/* ============================================
   PRINT STYLES
   ============================================ */
@media print {
  .header,
  .controls,
  .logout-btn,
  .add-student-btn,
  .empty-state-actions,
  .skip-link {
    display: none !important;
  }

  .main-content {
    padding: 0;
  }

  .students-grid {
    display: block;
  }

  .student-card {
    break-inside: avoid;
    page-break-inside: avoid;
    margin-bottom: 16px;
    box-shadow: none;
    border: 1px solid #ddd;
  }
}

/* ============================================
   DARK MODE MEDIA QUERY PLACEHOLDER
   ============================================ */
@media (prefers-color-scheme: dark) {
  /* Future dark mode support */
  /* Uncomment when implementing dark mode */
  /*
  :root {
    --color-bg-primary: #1a1a2e;
    --color-bg-secondary: #16213e;
    --color-text-primary: #eaeaea;
    --color-text-secondary: #b0b0b0;
  }
  */
}

/* ============================================
   UTILITY CLASSES FOR RESPONSIVE
   ============================================ */

/* Hide on mobile */
@media (max-width: 768px) {
  .hide-mobile {
    display: none !important;
  }
}

/* Show only on mobile */
@media (min-width: 769px) {
  .show-mobile-only {
    display: none !important;
  }
}

/* Hide on tablet and below */
@media (max-width: 1024px) {
  .hide-tablet {
    display: none !important;
  }
}

/* Stack on mobile */
@media (max-width: 768px) {
  .stack-mobile {
    flex-direction: column !important;
  }

  .stack-mobile > * {
    width: 100% !important;
  }
}

/* Full width on mobile */
@media (max-width: 480px) {
  .full-width-mobile {
    width: 100% !important;
    max-width: 100% !important;
  }
}

/* Text alignment on mobile */
@media (max-width: 480px) {
  .text-center-mobile {
    text-align: center !important;
  }
}