/* Responsive Design - Mobile First Improvements */

/* ====== Mobile Typography ====== */

@media (max-width: 768px) {
  html {
    font-size: 15px;
  }

  body {
    font-size: var(--font-size-base);
  }

  h1 {
    font-size: var(--font-size-3xl);
    margin-bottom: var(--spacing-lg);
  }

  h2 {
    font-size: var(--font-size-2xl);
    margin-bottom: var(--spacing-md);
  }

  h3 {
    font-size: var(--font-size-xl);
  }
}

/* ====== Mobile Layout ====== */

@media (max-width: 768px) {
  body {
    flex-direction: column;
  }

  .sidebar {
    width: 100%;
    height: auto;
    position: static;
    border-inline-start: none;
    border-bottom: 1px solid var(--color-gray-200);
    flex-direction: row;
    overflow-x: auto;
    overflow-y: hidden;
    padding: var(--spacing-md) 0;
  }

  .sidebar-brand {
    display: none;
  }

  .sidebar-nav {
    flex-direction: row;
    width: 100%;
    gap: 0;
    padding: 0 var(--spacing-lg);
  }

  .sidebar-nav-item {
    flex-shrink: 0;
  }

  .sidebar-nav-item a {
    padding: var(--spacing-sm) var(--spacing-md);
    font-size: var(--font-size-sm);
    border-inline-start: none;
    border-bottom: 3px solid transparent;
    white-space: nowrap;
  }

  .sidebar-nav-item a:hover,
  .sidebar-nav-item a.active {
    border-inline-start: none;
    border-bottom-color: var(--color-primary);
    background-color: transparent;
  }

  .content-wrapper {
    flex: 1;
    min-height: calc(100vh - auto);
  }

  .header {
    flex-direction: column;
    gap: var(--spacing-md);
    padding: var(--spacing-md);
  }

  .header-title {
    font-size: var(--font-size-xl);
    text-align: center;
  }

  .header-actions,
  .header-user {
    width: 100%;
    justify-content: space-between;
  }

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

@media (max-width: 640px) {
  .sidebar {
    padding: var(--spacing-sm) 0;
  }

  .sidebar-nav {
    padding: 0 var(--spacing-sm);
  }

  .sidebar-nav-item a {
    padding: var(--spacing-sm) var(--spacing-sm);
    font-size: 12px;
  }

  .sidebar-nav-item a .icon {
    min-width: 20px;
    font-size: 1.1em;
  }

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

  .header-title {
    font-size: var(--font-size-lg);
    order: 2;
  }

  .header-actions {
    order: 1;
  }

  .header-user {
    order: 3;
  }

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

/* ====== Mobile Buttons ====== */

@media (max-width: 768px) {
  button,
  .btn {
    padding: var(--spacing-md) var(--spacing-lg);
    font-size: var(--font-size-base);
    min-height: 44px; /* Touch target minimum */
    min-width: 44px;
  }

  button.btn-sm,
  .btn.btn-sm {
    min-height: 40px;
  }
}

@media (max-width: 640px) {
  .btn-group {
    flex-direction: column;
    gap: var(--spacing-md);
  }

  .btn-group button,
  .btn-group .btn {
    width: 100%;
  }
}

/* ====== Mobile Cards ====== */

@media (max-width: 768px) {
  .card {
    border-radius: var(--radius-md);
    margin-bottom: var(--spacing-md);
  }

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

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

  .card-footer {
    padding: var(--spacing-md);
    flex-direction: column;
    gap: var(--spacing-sm);
  }

  .card-footer button {
    width: 100%;
  }
}

/* ====== Mobile Grid ====== */

@media (max-width: 1024px) {
  .grid-cols-4 {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .grid-cols-3 {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 768px) {
  .grid-cols-1,
  .grid-cols-2,
  .grid-cols-3,
  .grid-cols-4 {
    grid-template-columns: 1fr;
  }

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

/* ====== Mobile Modals ====== */

@media (max-width: 768px) {
  .modal {
    max-width: 95vw;
    width: auto;
    max-height: 95vh;
  }

  .modal-header {
    padding: var(--spacing-lg) var(--spacing-md);
  }

  .modal-header h2 {
    font-size: var(--font-size-lg);
  }

  .modal-body {
    padding: var(--spacing-lg) var(--spacing-md);
  }

  .modal-footer {
    padding: var(--spacing-lg) var(--spacing-md);
    flex-direction: column-reverse;
  }

  .modal-footer button,
  .modal-footer .btn {
    width: 100%;
  }
}

/* ====== Mobile Alerts ====== */

@media (max-width: 768px) {
  .alert {
    padding: var(--spacing-md);
    font-size: var(--font-size-sm);
  }

  .alert-close {
    position: absolute;
    top: var(--spacing-md);
    right: var(--spacing-md);
  }
}

/* ====== Mobile Tables ====== */

@media (max-width: 768px) {
  table {
    font-size: var(--font-size-sm);
    display: block;
    overflow-x: auto;
    white-space: nowrap;
  }

  th,
  td {
    padding: var(--spacing-sm);
  }

  /* Scrollable table wrapper */
  .table-wrapper {
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
  }
}

/* ====== Mobile Pagination ====== */

@media (max-width: 768px) {
  .pagination {
    gap: var(--spacing-xs);
    justify-content: center;
  }

  .pagination a,
  .pagination button {
    min-width: 36px;
    height: 36px;
    font-size: var(--font-size-sm);
    padding: 0 var(--spacing-xs);
  }

  .pagination li:nth-child(n+4):nth-last-child(n+4) {
    display: none;
  }
}

/* ====== Mobile Toast/Notifications ====== */

@media (max-width: 768px) {
  .toast-container {
    left: var(--spacing-md) !important;
    right: var(--spacing-md) !important;
    bottom: var(--spacing-md) !important;
    max-width: calc(100% - var(--spacing-xl));
  }

  .toast {
    min-width: auto;
  }
}

/* ====== Mobile Dropdowns ====== */

@media (max-width: 768px) {
  .dropdown-menu {
    position: fixed;
    left: 0;
    right: 0;
    bottom: 0;
    top: auto;
    width: 100%;
    border-radius: var(--radius-xl) var(--radius-xl) 0 0;
    max-height: 60vh;
    overflow-y: auto;
    z-index: var(--z-dropdown);
  }

  .dropdown.active .dropdown-menu {
    animation: slideInUp 300ms ease-out;
  }
}

/* ====== Mobile Forms ====== */

@media (max-width: 768px) {
  .form-group {
    margin-bottom: var(--spacing-md);
  }

  .form-group input,
  .form-group textarea,
  .form-group select {
    padding: var(--spacing-md);
    font-size: 16px; /* Prevents zoom on mobile */
    border-radius: var(--radius-md);
  }

  .form-group input:focus,
  .form-group textarea:focus,
  .form-group select:focus {
    font-size: 16px;
  }

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

  .button-group {
    flex-direction: column;
    gap: var(--spacing-sm);
  }

  .button-group button,
  .button-group .btn {
    width: 100%;
    min-height: 44px;
  }

  /* Input groups on mobile */
  .input-group {
    flex-direction: column;
  }

  .input-group input,
  .input-group button {
    width: 100%;
    border-radius: var(--radius-md);
    margin-bottom: var(--spacing-sm);
  }

  .input-group button:last-child {
    margin-bottom: 0;
  }
}

/* ====== Mobile Spacing ====== */

@media (max-width: 768px) {
  .p-lg {
    padding: var(--spacing-md) !important;
  }

  .p-xl {
    padding: var(--spacing-lg) !important;
  }

  .m-lg {
    margin: var(--spacing-md) !important;
  }

  .m-xl {
    margin: var(--spacing-lg) !important;
  }

  .mt-lg {
    margin-top: var(--spacing-md) !important;
  }

  .mb-lg {
    margin-bottom: var(--spacing-md) !important;
  }
}

/* ====== Touch-friendly UI ====== */

@media (hover: none) and (pointer: coarse) {
  /* Mobile devices */
  
  button,
  .btn,
  a,
  [role="button"] {
    min-height: 44px;
    min-width: 44px;
    padding: var(--spacing-md) var(--spacing-lg);
  }

  button:active,
  .btn:active,
  a:active {
    transform: scale(0.95);
  }

  /* Larger touch targets */
  input[type="checkbox"],
  input[type="radio"] {
    width: 24px;
    height: 24px;
  }

  .checkbox-wrapper,
  .radio-wrapper {
    min-height: 44px;
    padding: var(--spacing-sm) 0;
  }

  /* Remove hover states on touch devices */
  button:hover,
  .btn:hover,
  a:hover,
  .card:hover {
    transform: none;
    box-shadow: inherit;
  }

  button:active,
  .btn:active,
  a:active,
  .card:active {
    transform: scale(0.98);
    opacity: 0.8;
  }
}

/* ====== Landscape orientation ====== */

@media (max-height: 500px) and (orientation: landscape) {
  .header {
    padding: var(--spacing-sm);
  }

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

  .sidebar {
    overflow-x: auto;
  }

  h1,
  h2 {
    margin-bottom: var(--spacing-sm);
  }

  .card-body,
  .card-header {
    padding: var(--spacing-sm);
  }
}

/* ====== Print Styles ====== */

@media print {
  .sidebar,
  .header,
  .footer,
  button,
  .btn,
  .modal-backdrop {
    display: none;
  }

  body,
  .main-content {
    padding: 0;
    margin: 0;
    background: white;
  }

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

  a {
    text-decoration: underline;
  }

  a::after {
    content: " (" attr(href) ")";
  }
}

/* ====== Utility visibility classes ====== */

.hidden-xs {
  @media (max-width: 480px) {
    display: none !important;
  }
}

.hidden-sm {
  @media (max-width: 768px) {
    display: none !important;
  }
}

.hidden-md {
  @media (min-width: 769px) and (max-width: 1024px) {
    display: none !important;
  }
}

.hidden-lg {
  @media (min-width: 1025px) {
    display: none !important;
  }
}

.visible-xs {
  @media (min-width: 481px) {
    display: none !important;
  }
}

.visible-sm {
  @media (min-width: 769px) {
    display: none !important;
  }
}

.visible-md {
  @media (max-width: 768px),
  (min-width: 1025px) {
    display: none !important;
  }
}

.visible-lg {
  @media (max-width: 1024px) {
    display: none !important;
  }
}