/* ==========================================================================
   Modal Overlay (Backdrop)
   ========================================================================== */
.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background-color: var(--ios-modal-overlay);
  backdrop-filter: blur(var(--ios-modal-backdrop-blur));
  -webkit-backdrop-filter: blur(var(--ios-modal-backdrop-blur));
  z-index: var(--ios-z-modal-backdrop);
  padding: var(--ios-spacing-lg);
  overflow-y: auto;
  overscroll-behavior: contain;
  animation: modalOverlayFadeIn var(--ios-modal-transition-enter) forwards;
}

.modal-overlay.closing {
  animation: modalOverlayFadeOut var(--ios-modal-transition-leave) forwards;
}

@keyframes modalOverlayFadeIn {
  from { opacity: 0; backdrop-filter: blur(0); }
  to { opacity: 1; backdrop-filter: blur(var(--ios-modal-backdrop-blur)); }
}

@keyframes modalOverlayFadeOut {
  from { opacity: 1; backdrop-filter: blur(var(--ios-modal-backdrop-blur)); }
  to { opacity: 0; backdrop-filter: blur(0); }
}

/* ==========================================================================
   Modal Container
   ========================================================================== */
.modal {
  position: relative;
  display: flex;
  flex-direction: column;
  width: 100%;
  max-height: calc(100vh - var(--ios-spacing-4xl));
  margin: auto;
  animation: modalSlideUp var(--ios-modal-transition-enter) cubic-bezier(0.2, 0.9, 0.4, 1);
  pointer-events: none;
}

.modal.closing {
  animation: modalSlideDown var(--ios-modal-transition-leave) forwards;
}

@keyframes modalSlideUp {
  from {
    opacity: 0;
    transform: translateY(30px) scale(0.95);
  }
  to {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

@keyframes modalSlideDown {
  from {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
  to {
    opacity: 0;
    transform: translateY(30px) scale(0.95);
  }
}

/* ==========================================================================
   Modal Content (Card)
   ========================================================================== */
.modal-content {
  display: flex;
  flex-direction: column;
  background-color: var(--ios-bg-primary);
  border-radius: var(--ios-radius-xl);
  box-shadow: var(--ios-modal-shadow);
  border: 1px solid var(--ios-border-secondary);
  overflow: auto;
  pointer-events: auto;
  transition: box-shadow var(--ios-transition-medium);
  position: relative;
}

.modal-content:hover {
  box-shadow: var(--ios-modal-shadow-hover);
}

/* ==========================================================================
   Modal Header
   ========================================================================== */
.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--ios-spacing-xl) var(--ios-spacing-xl) var(--ios-spacing-lg);
  border-bottom: 1px solid var(--ios-border-secondary);
  background-color: var(--ios-bg-primary);
  position: relative;
}

.modal-header-borderless {
  border-bottom: none;
  padding-bottom: var(--ios-spacing-md);
}

.modal-title {
  font-size: 1.25rem;
  font-weight: 700;
  line-height: 1.3;
  color: var(--ios-text-primary);
  margin: 0;
  letter-spacing: -0.02em;
}

.modal-subtitle {
  font-size: 0.9375rem;
  color: var(--ios-text-secondary);
  margin-top: var(--ios-spacing-xs);
  font-weight: normal;
}

.modal-close {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border: none;
  background: transparent;
  border-radius: var(--ios-radius-full);
  color: var(--ios-text-secondary);
  cursor: pointer;
  transition: all var(--ios-transition-fast);
  font-size: 1.25rem;
  padding: 0;
}

.modal-close:hover {
  background-color: var(--ios-gray-6);
  color: var(--ios-text-primary);
}

.modal-close:active {
  transform: scale(0.9);
}

/* ==========================================================================
   Modal Body
   ========================================================================== */
.modal-body {
  flex: 1;
  padding: var(--ios-spacing-xl);
  overflow-y: auto;
  background-color: var(--ios-bg-primary);
  -webkit-overflow-scrolling: touch;
}

/* Elegant scrollbar for modal body */
.modal-body::-webkit-scrollbar {
  width: 6px;
}

.modal-body::-webkit-scrollbar-track {
  background: transparent;
}

.modal-body::-webkit-scrollbar-thumb {
  background-color: var(--ios-gray-3);
  border-radius: var(--ios-radius-full);
  border: 2px solid transparent;
}

.modal-body::-webkit-scrollbar-thumb:hover {
  background-color: var(--ios-gray-2);
}

/* ==========================================================================
   Modal Footer
   ========================================================================== */
.modal-footer {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  padding: var(--ios-spacing-lg) var(--ios-spacing-xl);
  border-top: 1px solid var(--ios-border-secondary);
  background-color: var(--ios-bg-secondary);
  gap: var(--ios-spacing-md);
  flex-wrap: wrap;
}

.modal-footer-left {
  justify-content: flex-start;
}

.modal-footer-center {
  justify-content: center;
}

.modal-footer-between {
  justify-content: space-between;
}

.modal-footer-stacked {
  flex-direction: column;
  align-items: stretch;
}

/* ==========================================================================
   Modal Sizes
   ========================================================================== */

.modal.modal-sm {
  max-width: var(--ios-modal-sm);
}

.modal.modal-md {
  max-width: var(--ios-modal-md);
}

.modal.modal-lg {
  max-width: var(--ios-modal-lg);
}

.modal.modal-xl {
  max-width: var(--ios-modal-xl);
}

.modal.modal-full {
  max-width: var(--ios-modal-full);
}
/* Full Screen Modal (Mobile style) */
.modal.modal-fullscreen {
  max-width: 100%;
  max-height: 100vh;
  margin: 0;
}

.modal-fullscreen .modal-content {
  border-radius: 0;
  min-height: 100vh;
}

/* ==========================================================================
   Modal Positions
   ========================================================================== */

/* Top Position */
.modal-top .modal {
  margin-top: var(--ios-spacing-2xl);
  align-self: flex-start;
}

.modal-top .modal-content {
  animation: modalSlideDown var(--ios-modal-transition-enter);
}

/* Bottom Position (iOS Action Sheet Style) */
.modal-bottom .modal {
  margin-bottom: var(--ios-spacing-2xl);
  align-self: flex-end;
}

.modal-bottom .modal-content {
  animation: modalSlideUp var(--ios-modal-transition-enter);
}

/* Center Position (Default) */
.modal-center .modal {
  margin: auto;
}

/* ==========================================================================
   Modal Types
   ========================================================================== */

/* Alert Modal */
.modal-alert .modal-content {
  border-top: 4px solid var(--ios-primary);
}

.modal-alert-warning .modal-content {
  border-top-color: var(--ios-orange);
}

.modal-alert-danger .modal-content {
  border-top-color: var(--ios-red);
}

.modal-alert-success .modal-content {
  border-top-color: var(--ios-green);
}

/* Form Modal - No border, cleaner look */
.modal-form .modal-content {
  box-shadow: var(--ios-shadow-prominent);
}

.modal-form .modal-header {
  padding-bottom: var(--ios-spacing-md);
}

.modal-form .modal-body {
  padding: var(--ios-spacing-xl);
}

.modal-form .modal-footer {
  padding: var(--ios-spacing-lg) var(--ios-spacing-xl);
  background-color: var(--ios-bg-primary);
  border-top-color: var(--ios-border-tertiary);
}

/* Drawer Modal (Slides from side) */
.modal-drawer-right .modal {
  margin-right: 0;
  max-width: 400px;
  animation: modalSlideInRight var(--ios-modal-transition-enter);
}

.modal-drawer-left .modal {
  margin-left: 0;
  max-width: 400px;
  animation: modalSlideInLeft var(--ios-modal-transition-enter);
}

@keyframes modalSlideInRight {
  from { transform: translateX(100%); }
  to { transform: translateX(0); }
}

@keyframes modalSlideInLeft {
  from { transform: translateX(-100%); }
  to { transform: translateX(0); }
}

/* ==========================================================================
   Modal Sections & Layouts
   ========================================================================== */

/* Two Column Layout inside Modal */
.modal-two-column {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--ios-spacing-xl);
}

/* Scrollable Content Section */
.modal-section {
  margin-bottom: var(--ios-spacing-xl);
}

.modal-section:last-child {
  margin-bottom: 0;
}

.modal-section-title {
  font-size: 0.9375rem;
  font-weight: 600;
  color: var(--ios-text-secondary);
  margin-bottom: var(--ios-spacing-md);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.modal-divider {
  margin: var(--ios-spacing-lg) 0;
  border: 0;
  border-top: 1px solid var(--ios-border-secondary);
}

/* ==========================================================================
   Modal Actions (Buttons Container)
   ========================================================================== */
.modal-actions {
  display: flex;
  gap: var(--ios-spacing-md);
  align-items: center;
}

.modal-actions-vertical {
  flex-direction: column;
  align-items: stretch;
}

.modal-actions-vertical .btn {
  width: 100%;
}

/* ==========================================================================
   Responsive Breakpoints
   ========================================================================== */

/* Large Desktops (1200px and above) */
@media screen and (min-width: 1200px) {
  .modal-xl .modal {
    max-width: var(--ios-modal-xl);
  }
  
  .modal-lg .modal {
    max-width: var(--ios-modal-lg);
  }
}

/* Medium Desktops & Laptops (992px to 1199px) */
@media screen and (max-width: 1199px) {
  :root {
    --ios-modal-lg: 650px;
    --ios-modal-xl: 800px;
  }
  
  .modal-two-column {
    grid-template-columns: 1fr;
    gap: var(--ios-spacing-lg);
  }
}

/* Tablets & Small Laptops (768px to 991px) */
@media screen and (max-width: 991px) {
  .modal {
    max-height: calc(100vh - var(--ios-spacing-3xl));
  }
  
  .modal-header {
    padding: var(--ios-spacing-lg) var(--ios-spacing-lg) var(--ios-spacing-md);
  }
  
  .modal-body {
    padding: var(--ios-spacing-lg);
  }
  
  .modal-footer {
    padding: var(--ios-spacing-md) var(--ios-spacing-lg);
  }
  
  .modal-sm .modal,
  .modal-md .modal,
  .modal-lg .modal,
  .modal-xl .modal {
    max-width: 90%;
  }
}

/* Mobile Landscape & Small Tablets (576px to 767px) */
@media screen and (max-width: 767px) {
  .modal-overlay {
    padding: var(--ios-spacing-md);
    align-items: flex-end; /* Bottom sheet style on mobile */
  }
  
  .modal {
    margin-bottom: 0;
    max-height: 90vh;
  }
  
  .modal-content {
    border-radius: var(--ios-radius-xl) var(--ios-radius-xl) var(--ios-radius-lg) var(--ios-radius-lg);
  }
  
  .modal-header {
    padding: var(--ios-spacing-lg) var(--ios-spacing-lg) var(--ios-spacing-md);
  }
  
  .modal-title {
    font-size: 1.125rem;
  }
  
  .modal-body {
    padding: var(--ios-spacing-lg);
  }
  
  .modal-footer {
    flex-direction: column;
    align-items: stretch;
    padding: var(--ios-spacing-md) var(--ios-spacing-lg);
  }
  
  .modal-footer .btn {
    width: 100%;
    margin: 0;
  }
  
  .modal-actions {
    flex-direction: column;
    width: 100%;
  }
  
  .modal-actions .btn {
    width: 100%;
  }
  
  /* Disable hover effects on mobile */
  .modal-content:hover {
    box-shadow: var(--ios-modal-shadow);
  }
  
  .modal-close:hover {
    background-color: transparent;
  }
}

/* Mobile Portrait (575px and below) */
@media screen and (max-width: 575px) {
  .modal-overlay {
    padding: 0;
  }
  
  .modal {
    max-width: 100% !important;
    max-height: 100vh;
    margin: 0;
  }
  
  .modal-content {
    border-radius: var(--ios-radius-lg) var(--ios-radius-lg) 0 0;
    min-height: auto;
  }
  
  .modal-fullscreen-mobile .modal-content {
    border-radius: 0;
    min-height: 100vh;
  }
  
  .modal-header {
    padding: var(--ios-spacing-lg) var(--ios-spacing-lg) var(--ios-spacing-md);
  }
  
  .modal-body {
    padding: var(--ios-spacing-md);
  }
  
  .modal-title {
    font-size: 1rem;
  }
  
  .modal-subtitle {
    font-size: 0.875rem;
  }
  
  .modal-close {
    width: 44px; /* Larger touch target on mobile */
    height: 44px;
  }
  
  /* Bottom sheet behavior on mobile */
  .modal-bottom-mobile .modal {
    margin-top: auto;
    animation: modalSlideUp var(--ios-modal-transition-enter);
  }
}

/* ==========================================================================
   Modal with Form Integration
   ========================================================================== */
.modal .form-section {
  background-color: transparent;
  padding: 0;
  margin-bottom: 0;
  box-shadow: none;
}

.modal .form-group:last-child {
  margin-bottom: 0;
}

.modal .form-control {
  background-color: var(--ios-gray-6);
  border-width: 1px;
}

.modal .form-control:focus {
  background-color: var(--ios-bg-primary);
}

/* ==========================================================================
   Modal Loading State
   ========================================================================== */
.modal-loading {
  position: relative;
  min-height: 200px;
}

.modal-loading::after {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 40px;
  height: 40px;
  margin: -20px 0 0 -20px;
  border: 3px solid var(--ios-gray-5);
  border-top-color: var(--ios-primary);
  border-radius: 50%;
  animation: modalSpin 0.8s linear infinite;
}

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

/* ==========================================================================
   Modal Animations
   ========================================================================== */
@keyframes modalShake {
  0%, 100% { transform: translateX(0); }
  20%, 60% { transform: translateX(-5px); }
  40%, 80% { transform: translateX(5px); }
}

.modal-shake {
  animation: modalShake 0.4s ease-in-out;
}

/* ==========================================================================
   Accessibility
   ========================================================================== */
.modal-content:focus-visible {
  outline: 2px solid var(--ios-primary);
  outline-offset: 2px;
}

.modal-close:focus-visible {
  outline: 2px solid var(--ios-primary);
  outline-offset: 2px;
}

/* Reduced motion preferences */
@media (prefers-reduced-motion: reduce) {
  .modal,
  .modal-overlay,
  .modal-content,
  .modal-close {
    animation: none !important;
    transition: none !important;
  }
}

/* ==========================================================================
   Dark Mode Support
   ========================================================================== */
@media (prefers-color-scheme: dark) {
  .modal-content {
    background-color: var(--ios-bg-primary);
    border-color: var(--ios-border-primary);
  }
  
  .modal-header {
    background-color: var(--ios-bg-primary);
    border-bottom-color: var(--ios-border-primary);
  }
  
  .modal-body {
    background-color: var(--ios-bg-primary);
  }
  
  .modal-footer {
    background-color: var(--ios-bg-secondary);
    border-top-color: var(--ios-border-primary);
  }
  
  .modal .form-control {
    background-color: var(--ios-gray-6);
    border-color: var(--ios-border-primary);
  }
  
  .modal-overlay {
    background-color: var(--ios-modal-overlay-dark);
  }
  
  .modal-close {
    color: var(--ios-text-tertiary);
  }
  
  .modal-close:hover {
    background-color: var(--ios-gray-6);
  }
}

/* ==========================================================================
   Print Styles
   ========================================================================== */
@media print {
  .modal-overlay {
    position: absolute;
    background: none;
    backdrop-filter: none;
  }
  
  .modal-content {
    box-shadow: none;
    border: 1px solid #000;
  }
}