/* ============================================
   MOBILE-FIRST STYLES & ENHANCEMENTS
   ============================================
   Mobile UI/UX optimization layer
   Applied globally across all pages
   ============================================ */

:root {
  /* Mobile-specific spacing */
  --mobile-padding: 1rem;
  --mobile-gap: 0.75rem;
  --mobile-padding-sm: 0.75rem;
  --mobile-padding-xs: 0.5rem;
  
  /* Touch targets (WCAG 2.1 Level AAA) */
  --touch-target-min: 44px;
  --touch-target-comfortable: 48px;
  --touch-spacing: 12px;
  
  /* Mobile animations */
  --transition-fast: 150ms ease;
  --transition-base: 280ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-smooth: 400ms cubic-bezier(0.4, 0, 0.2, 1);
  
  /* Safe area insets for notched devices */
  --safe-area-inset-top: env(safe-area-inset-top, 0px);
  --safe-area-inset-bottom: env(safe-area-inset-bottom, 0px);
}

/* ============================================
   MOBILE-SPECIFIC BASE STYLES
   ============================================ */

@media (max-width: 640px) {
  /* Prevent horizontal scroll */
  html {
    overflow-x: hidden;
  }
  
  body {
    overflow-x: hidden;
    /* Prevent iOS text size adjustment */
    -webkit-text-size-adjust: 100%;
    /* Enable momentum scrolling on iOS */
    -webkit-overflow-scrolling: touch;
  }
  
  /* Container spacing */
  .container {
    padding: var(--mobile-padding);
  }
  
  .container-narrow {
    padding: var(--mobile-padding);
  }
  
  /* Main content area */
  main {
    gap: var(--mobile-gap);
  }
}

/* ============================================
   TOUCH-OPTIMIZED BUTTONS
   ============================================ */

@media (max-width: 640px) {
  .btn {
    padding: 0.875rem 1.5rem;
    min-height: var(--touch-target-min);
    font-size: 15px;
    width: 100%;
    justify-content: center;
    /* Improve tap response */
    touch-action: manipulation;
    -webkit-tap-highlight-color: transparent;
  }
  
  .btn-small {
    padding: 0.625rem 1rem;
    min-height: 40px;
    font-size: 14px;
  }
  
  /* Button groups stack vertically on mobile */
  .button-row {
    flex-direction: column;
    gap: var(--mobile-gap);
  }
  
  .button-row .btn {
    width: 100%;
  }
  
  .button-group {
    flex-direction: column;
    width: 100%;
    gap: var(--mobile-gap);
  }
  
  .button-group .btn {
    width: 100%;
  }
}

/* ============================================
   MOBILE-OPTIMIZED FORM INPUTS
   ============================================ */

@media (max-width: 640px) {
  .form-grid input,
  .form-grid select,
  .form-grid textarea {
    padding: 0.875rem 1rem;
    min-height: var(--touch-target-min);
    /* Prevent iOS zoom on focus */
    font-size: 16px;
    /* Better touch interaction */
    touch-action: manipulation;
    -webkit-tap-highlight-color: transparent;
  }
  
  .form-grid textarea {
    min-height: 120px;
  }
  
  .form-grid label {
    font-size: 15px;
    gap: 0.5rem;
  }
  
  /* Ensure dropdowns are touch-friendly */
  .form-grid select {
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='24' height='24' viewBox='0 0 24 24' fill='none' stroke='%234f5d6f' 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 0.75rem center;
    background-size: 20px;
    padding-right: 3rem;
    appearance: none;
    -webkit-appearance: none;
    -moz-appearance: none;
  }
  
  /* Date inputs */
  .form-grid input[type="date"],
  .form-grid input[type="time"],
  .form-grid input[type="datetime-local"] {
    min-height: var(--touch-target-comfortable);
  }
  
  /* Number inputs */
  .form-grid input[type="number"] {
    appearance: textfield;
    -moz-appearance: textfield;
  }
  
  .form-grid input[type="number"]::-webkit-inner-spin-button,
  .form-grid input[type="number"]::-webkit-outer-spin-button {
    -webkit-appearance: none;
    margin: 0;
  }
}

/* ============================================
   MOBILE-OPTIMIZED CARDS
   ============================================ */

@media (max-width: 640px) {
  .card {
    padding: var(--mobile-padding);
    border-radius: var(--radius-sm);
  }
  
  .nested-card {
    padding: var(--mobile-padding-sm);
    margin-top: var(--mobile-gap);
  }
  
  .card h2 {
    font-size: 20px;
    margin-bottom: var(--mobile-gap);
  }
  
  .card h3 {
    font-size: 18px;
    margin-bottom: var(--mobile-gap);
  }
}

/* ============================================
   MOBILE MODULE CARDS (Portal)
   ============================================ */

@media (max-width: 640px) {
  .module-grid {
    grid-template-columns: 1fr;
    gap: var(--mobile-gap);
  }
  
  .module-card {
    padding: var(--mobile-padding);
    /* Remove hover effects, use active state for touch */
    transition: none;
  }
  
  .module-card:active {
    border-color: var(--color-accent);
    box-shadow: var(--shadow-soft);
    transform: scale(0.98);
  }
  
  .module-card:active::before {
    opacity: 1;
  }
  
  .module-launch {
    width: 100%;
    justify-content: center;
    min-height: var(--touch-target-min);
    padding: 0.875rem 1rem;
  }
}

/* ============================================
   MOBILE-OPTIMIZED MODALS
   ============================================ */

@media (max-width: 640px) {
  .modal {
    padding: var(--mobile-padding);
  }
  
  .modal-content {
    width: 100%;
    max-width: 100%;
    margin: 0;
    border-radius: var(--radius-md);
    /* Account for safe areas on notched devices */
    margin-top: var(--safe-area-inset-top);
    margin-bottom: var(--safe-area-inset-bottom);
  }
  
  .modal-header {
    padding: var(--mobile-padding);
  }
  
  .modal form {
    padding: var(--mobile-padding);
  }
  
  .modal-footer {
    flex-direction: column-reverse;
    gap: var(--mobile-gap);
  }
  
  .modal-footer .btn {
    width: 100%;
    order: 1;
  }
  
  .modal-footer .btn-secondary {
    order: 2;
  }
}

/* ============================================
   MOBILE-OPTIMIZED FLASH MESSAGES
   ============================================ */

@media (max-width: 640px) {
  .flash-list {
    margin: 0 0 var(--mobile-gap) 0;
    gap: var(--mobile-gap);
  }
  
  .flash {
    padding: var(--mobile-padding-sm) var(--mobile-padding);
    font-size: 15px;
    border-radius: var(--radius-sm);
  }
}

/* ============================================
   MOBILE-OPTIMIZED BADGES
   ============================================ */

@media (max-width: 640px) {
  .badge {
    padding: 0.375rem 0.625rem;
    font-size: 12px;
  }
}

/* ============================================
   MOBILE-OPTIMIZED LISTS
   ============================================ */

@media (max-width: 640px) {
  .list {
    gap: var(--mobile-gap);
  }
  
  .list li {
    padding: var(--mobile-padding-sm);
  }
}

/* ============================================
   MOBILE TABLE ALTERNATIVES
   ============================================ */

@media (max-width: 640px) {
  /* Convert tables to cards on mobile */
  .mobile-card-view {
    display: block !important;
  }
  
  .mobile-card-view thead {
    display: none;
  }
  
  .mobile-card-view tbody {
    display: flex;
    flex-direction: column;
    gap: var(--mobile-gap);
  }
  
  .mobile-card-view tr {
    display: block;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    padding: var(--mobile-padding-sm);
  }
  
  .mobile-card-view td {
    display: flex;
    justify-content: space-between;
    padding: 0.5rem 0;
    border: none;
  }
  
  .mobile-card-view td::before {
    content: attr(data-label);
    font-weight: 600;
    color: var(--color-muted);
    font-size: 13px;
    text-transform: uppercase;
    letter-spacing: 0.03em;
  }
  
  .mobile-card-view td:first-child {
    padding-top: 0;
  }
  
  .mobile-card-view td:last-child {
    padding-bottom: 0;
  }
}

/* ============================================
   HORIZONTAL SCROLL INDICATORS
   ============================================ */

.table-scroll-wrapper {
  position: relative;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

@media (max-width: 640px) {
  .table-scroll-wrapper::after {
    content: '→ Swipe to see more';
    position: sticky;
    right: 0;
    bottom: 0;
    background: linear-gradient(to left, var(--color-bg) 50%, transparent);
    padding: 0.5rem 1rem;
    font-size: 12px;
    color: var(--color-muted);
    font-weight: 600;
    pointer-events: none;
    opacity: 0.8;
  }
  
  .table-scroll-wrapper::-webkit-scrollbar {
    height: 6px;
  }
  
  .table-scroll-wrapper::-webkit-scrollbar-thumb {
    background: var(--color-border);
    border-radius: 3px;
  }
}

/* ============================================
   MOBILE-OPTIMIZED EMPTY STATES
   ============================================ */

@media (max-width: 640px) {
  .empty-state {
    padding: var(--space-3);
  }
  
  .empty-state h3 {
    font-size: 18px;
  }
}

/* ============================================
   PREVENT DOUBLE-TAP ZOOM (where appropriate)
   ============================================ */

.no-double-tap-zoom {
  touch-action: manipulation;
}

/* ============================================
   LOADING STATES FOR MOBILE
   ============================================ */

.mobile-loading-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.5);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 99999;
}

.mobile-loading-spinner {
  width: 48px;
  height: 48px;
  border: 4px solid rgba(255, 255, 255, 0.2);
  border-top-color: white;
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

/* ============================================
   MOBILE UTILITY CLASSES
   ============================================ */

@media (max-width: 640px) {
  .mobile-hide {
    display: none !important;
  }
  
  .mobile-show {
    display: block !important;
  }
  
  .mobile-full-width {
    width: 100% !important;
  }
  
  .mobile-text-center {
    text-align: center !important;
  }
  
  .mobile-stack {
    flex-direction: column !important;
  }
}

/* Desktop hide */
@media (min-width: 641px) {
  .desktop-hide {
    display: none !important;
  }
}

/* ============================================
   IMPROVED TAP HIGHLIGHTS
   ============================================ */

a, button, .btn, .clickable {
  -webkit-tap-highlight-color: rgba(2, 129, 82, 0.1);
  -webkit-touch-callout: none;
}

/* ============================================
   STICKY ELEMENTS ON MOBILE
   ============================================ */

@media (max-width: 640px) {
  .mobile-sticky-bottom {
    position: sticky;
    bottom: 0;
    background: var(--color-surface);
    padding: var(--mobile-padding);
    border-top: 1px solid var(--color-border);
    box-shadow: 0 -4px 16px rgba(15, 23, 42, 0.08);
    z-index: 100;
    margin-left: calc(-1 * var(--mobile-padding));
    margin-right: calc(-1 * var(--mobile-padding));
    margin-bottom: calc(-1 * var(--mobile-padding));
  }
  
  .mobile-sticky-top {
    position: sticky;
    top: 0;
    background: var(--color-surface);
    padding: var(--mobile-padding);
    border-bottom: 1px solid var(--color-border);
    box-shadow: 0 4px 16px rgba(15, 23, 42, 0.08);
    z-index: 100;
    margin-left: calc(-1 * var(--mobile-padding));
    margin-right: calc(-1 * var(--mobile-padding));
    margin-top: calc(-1 * var(--mobile-padding));
  }
}

/* ============================================
   ACCESSIBILITY - REDUCED MOTION
   ============================================ */

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

/* ============================================
   SAFE AREA SUPPORT FOR NOTCHED DEVICES
   ============================================ */

@supports (padding: max(0px)) {
  @media (max-width: 640px) {
    body {
      padding-top: max(0px, env(safe-area-inset-top));
      padding-bottom: max(0px, env(safe-area-inset-bottom));
    }
    
    .mobile-sticky-bottom {
      padding-bottom: max(var(--mobile-padding), env(safe-area-inset-bottom));
    }
    
    .mobile-sticky-top {
      padding-top: max(var(--mobile-padding), env(safe-area-inset-top));
    }
  }
}