/**
 * Responsive Styles for Training Management System
 * Mobile-first approach with desktop preservation
 */

/* =========================================================
   BREAKPOINTS
========================================================= */
/* Mobile: max-width 576px */
/* Tablet: max-width 768px */
/* Desktop: 769px+ */

/* =========================================================
   MOBILE: HEADER & SIDEBAR DRAWER
========================================================= */
@media (max-width: 768px) {
  /* Hamburger menu button */
  .mobile-menu-toggle {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 44px;
    height: 44px;
    background: transparent;
    border: none;
    color: #ffffff;
    font-size: 24px;
    cursor: pointer;
    padding: 0;
    margin-right: 10px;
  }

  .mobile-menu-toggle:focus {
    outline: 2px solid #2563eb;
    outline-offset: 2px;
  }

  .mobile-menu-toggle:hover {
    opacity: 0.8;
  }

  /* Hide sidebar by default on mobile */
  .sidebar {
    position: fixed;
    top: 60px;
    left: -220px;
    width: 220px;
    height: calc(100vh - 60px);
    transition: left 0.3s ease;
    z-index: 999;
    overflow-y: auto;
    -webkit-overflow-scrolling: touch;
  }

  /* Show sidebar when drawer is open */
  .sidebar.drawer-open {
    left: 0;
    box-shadow: 2px 0 8px rgba(0, 0, 0, 0.2);
  }

  /* Overlay when drawer is open */
  .drawer-overlay {
    display: none;
    position: fixed;
    top: 60px;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.5);
    z-index: 998;
  }

  .drawer-overlay.active {
    display: block;
  }

  /* Content full width on mobile */
  .content {
    margin-left: 0;
    padding: 15px;
  }

  /* Footer full width on mobile (sidebar hidden) */
  .main-footer {
    left: 0;
  }

  /* Header adjustments */
  .header-left span {
    display: none; /* Hide company name on mobile */
  }

  .header-right {
    font-size: 13px;
    gap: 10px;
  }

  .header-right a {
    padding: 8px 12px;
    min-height: 44px;
    display: flex;
    align-items: center;
  }
}

/* =========================================================
   MOBILE: TABLES → CARDS
========================================================= */
@media (max-width: 768px) {
  /* Hide table on mobile */
  .table {
    display: none;
  }

  /* Show card container */
  .mobile-cards {
    display: block;
  }

  /* Card styling */
  .mobile-card {
    background: #ffffff;
    border: 1px solid #e5e7eb;
    border-radius: 8px;
    padding: 16px;
    margin-bottom: 12px;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
  }

  .mobile-card-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 12px;
    padding-bottom: 12px;
    border-bottom: 1px solid #e5e7eb;
  }

  .mobile-card-title {
    font-weight: 600;
    font-size: 16px;
    color: #111827;
    flex: 1;
  }

  .mobile-card-badge {
    margin-left: 8px;
  }

  .mobile-card-field {
    display: flex;
    justify-content: space-between;
    padding: 8px 0;
    font-size: 14px;
  }

  .mobile-card-label {
    color: #6b7280;
    font-weight: 500;
    min-width: 100px;
  }

  .mobile-card-value {
    color: #111827;
    text-align: right;
    flex: 1;
  }

  .mobile-card-actions {
    margin-top: 12px;
    padding-top: 12px;
    border-top: 1px solid #e5e7eb;
    display: flex;
    flex-direction: column;
    gap: 8px;
  }

  .mobile-card-actions .btn {
    width: 100%;
    padding: 12px;
    min-height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
  }
}

/* Desktop: Hide mobile cards, show table */
@media (min-width: 769px) {
  .mobile-cards {
    display: none;
  }

  .mobile-menu-toggle {
    display: none;
  }

  .drawer-overlay {
    display: none !important;
  }
}

/* =========================================================
   MOBILE: FORMS
========================================================= */
@media (max-width: 768px) {
  /* Single column forms */
  .form-inline {
    flex-direction: column;
  }

  .form-inline > * {
    width: 100%;
  }

  /* Full width inputs */
  input:not([type="checkbox"]):not([type="radio"]),
  select,
  textarea {
    width: 100% !important;
    padding: 12px;
    font-size: 16px; /* Prevents zoom on iOS */
    min-height: 44px;
    box-sizing: border-box;
  }

  /* Form groups */
  .form-group {
    margin-bottom: 20px;
  }

  /* Form card */
  .form-card {
    padding: 20px 15px;
  }

  /* Sticky submit button */
  .form-actions-sticky {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background: #ffffff;
    padding: 12px 15px;
    box-shadow: 0 -2px 8px rgba(0, 0, 0, 0.1);
    z-index: 100;
  }

  .form-actions-sticky .btn {
    width: 100%;
    padding: 14px;
    min-height: 44px;
    font-size: 16px;
  }

  /* Add padding to content when sticky button is present */
  .content.has-sticky-form {
    padding-bottom: 80px;
  }

  /* Checkbox and radio spacing */
  input[type="checkbox"],
  input[type="radio"] {
    min-width: 44px;
    min-height: 44px;
    margin-right: 8px;
  }

  /* Label spacing */
  label {
    margin-bottom: 8px;
    display: block;
  }
}

/* =========================================================
   MOBILE: BUTTONS & ACTIONS
========================================================= */
@media (max-width: 768px) {
  /* Larger buttons */
  .btn {
    min-height: 44px;
    padding: 12px 16px;
    font-size: 15px;
  }

  /* Icon + label buttons */
  .btn-icon-label {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
  }

  /* Stack action buttons */
  .action-buttons {
    display: flex;
    flex-direction: column;
    gap: 8px;
  }

  .action-buttons .btn {
    width: 100%;
  }

  /* Page header actions */
  .page-header {
    flex-direction: column;
    align-items: flex-start;
    gap: 15px;
  }

  .page-header .actions {
    width: 100%;
  }

  .page-header .actions .btn {
    width: 100%;
  }
}

/* =========================================================
   MOBILE: DASHBOARD
========================================================= */
@media (max-width: 768px) {
  /* Stack dashboard cards */
  .dashboard-grid {
    grid-template-columns: 1fr !important;
  }

  .dashboard-card {
    margin-bottom: 15px;
  }

  /* Hide non-essential charts on mobile */
  .dashboard-chart {
    display: none;
  }

  /* KPI cards */
  .kpi-card {
    padding: 16px;
    margin-bottom: 12px;
  }

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

  .kpi-label {
    font-size: 13px;
  }
}

/* =========================================================
   MOBILE: GENERAL UX
========================================================= */
@media (max-width: 768px) {
  /* Prevent horizontal scroll */
  body {
    overflow-x: hidden;
  }

  /* Safe spacing */
  .content {
    padding: 15px;
  }

  /* Larger tap targets */
  a, button, input[type="submit"], input[type="button"] {
    min-height: 44px;
    min-width: 44px;
  }

  /* Auth card mobile */
  .auth-card {
    width: 100%;
    max-width: 400px;
    padding: 25px 20px;
  }

  .auth-container {
    padding: 15px;
  }

  /* Empty states */
  .empty-state {
    text-align: center;
    padding: 40px 20px;
    color: #6b7280;
  }

  .empty-state-icon {
    font-size: 48px;
    margin-bottom: 16px;
  }

  .empty-state-title {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 8px;
    color: #111827;
  }

  .empty-state-message {
    font-size: 14px;
  }
}

  /* Pagination mobile */
  .pagination {
    flex-direction: column;
    gap: 15px;
    padding: 15px;
  }

  .pagination > div {
    width: 100%;
    text-align: center;
  }

  .pagination .btn {
    min-width: 44px;
    padding: 10px 14px;
  }

  /* Table card wrapper */
  .table-card {
    overflow-x: visible;
  }

  /* Action menu mobile */
  .action-menu-wrapper {
    position: relative;
  }

  .action-menu {
    position: absolute;
    right: 0;
    top: 100%;
    margin-top: 4px;
    min-width: 150px;
  }

  /* Page header mobile */
  .page-header {
    flex-direction: column;
    align-items: flex-start;
    gap: 15px;
  }

  .page-header h2 {
    font-size: 20px;
  }

  .page-header .muted {
    font-size: 13px;
  }

  /* Modal mobile */
  .modal,
  #trainerModal,
  #candidateModal {
    padding: 20px 15px;
  }

  .modal > div,
  #trainerModal > div,
  #candidateModal > div {
    width: 95%;
    max-width: none;
    padding: 20px;
  }

  /* Sidebar menu items - larger tap targets on mobile */
  .sidebar a {
    min-height: 44px;
    padding: 14px 20px;
  }

  .sidebar .menu-title {
    padding: 16px 20px 8px;
    font-size: 12px;
    min-height: auto;
    color: #9ca3af;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
  }
}

/* =========================================================
   TABLET: ADJUSTMENTS
========================================================= */
@media (min-width: 577px) and (max-width: 768px) {
  .content {
    padding: 20px;
  }

  .mobile-card {
    padding: 20px;
  }
}

/* =========================================================
   UTILITY CLASSES
========================================================= */
.mobile-only {
  display: none;
}

.desktop-only {
  display: block;
}

@media (max-width: 768px) {
  .mobile-only {
    display: block;
  }

  .desktop-only {
    display: none;
  }
}

/* Prevent layout jumps */
img {
  max-width: 100%;
  height: auto;
}

/* Safe touch targets */
@media (max-width: 768px) {
  .btn-icon {
    min-width: 44px;
    min-height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
  }
}