/**
 * MODAL/DIALOG COMPONENT
 * 
 * Unified modal system for both admin and public interfaces
 * Uses design tokens from tokens.css
 * Compatible with universal-modal.js
 * 
 * Features:
 * - Modal backdrop with blur effect
 * - Modal container with smooth animations
 * - Modal header/body/footer structure
 * - Sizes: sm, md (default), lg, xl, full
 * - Centered vs top-aligned positioning
 * - Dismissible with close button
 * - Animated entrance/exit
 * - Scroll support for long content
 * - Nested modals with z-index layering
 * - Loading state
 * - Confirmation dialogs
 * - Mobile responsive
 */

/* ============================================================================
   MODAL BACKDROP
   ============================================================================ */

.modal__backdrop {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: var(--bg-overlay);
  backdrop-filter: blur(2px);
  z-index: var(--z-modal);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-4);
  overflow-y: auto;
  
  /* Animation */
  opacity: 0;
  animation: fadeIn var(--duration-200) var(--ease-out) forwards;
}

.modal__backdrop.modal-closing {
  animation: fadeOut var(--duration-200) var(--ease-out) forwards;
}

@keyframes fadeIn {
  to {
    opacity: 1;
  }
}

@keyframes fadeOut {
  to {
    opacity: 0;
  }
}

/* Top-aligned (for long modals) */
.modal__backdrop.modal-top {
  align-items: flex-start;
  padding-top: var(--space-12);
}

/* ============================================================================
   MODAL CONTAINER
   ============================================================================ */

.modal {
  background-color: var(--bg-surface);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-2xl);
  width: 100%;
  max-width: var(--container-sm);
  max-height: calc(100vh - 80px);
  display: flex;
  flex-direction: column;
  position: relative;
  
  /* Animation */
  transform: scale(0.9) translateY(calc(-1 * var(--space-5)));
  opacity: 0;
  animation: modalSlideIn var(--duration-200) var(--ease-out) forwards;
}

.modal__backdrop.modal-closing .modal {
  animation: modalSlideOut var(--duration-200) var(--ease-out) forwards;
}

@keyframes modalSlideIn {
  to {
    transform: scale(1) translateY(0);
    opacity: 1;
  }
}

@keyframes modalSlideOut {
  to {
    transform: scale(0.9) translateY(calc(-1 * var(--space-5)));
    opacity: 0;
  }
}

/* ============================================================================
   MODAL SIZES
   ============================================================================ */

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

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

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

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

.modal--full {
  max-width: calc(100vw - var(--space-8));
  max-height: calc(100vh - var(--space-8));
}

/* ============================================================================
   MODAL HEADER
   ============================================================================ */

.modal__header {
  padding: var(--space-6);
  border-bottom: var(--border-width) solid var(--color-gray-200);
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-shrink: 0;
}

.modal__title {
  font-size: var(--text-xl);
  font-weight: var(--font-weight-semibold);
  color: var(--color-gray-900);
  margin: 0;
  line-height: 1.2;
}

.modal__close {
  background: none;
  border: none;
  width: var(--icon-lg);
  height: var(--icon-lg);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  color: var(--color-gray-500);
  transition: all var(--duration-150) var(--ease-out);
  flex-shrink: 0;
  margin-left: var(--space-4);
}

.modal__close:hover {
  background-color: var(--color-gray-100);
  color: var(--color-gray-700);
}

.modal__close:active {
  transform: scale(0.95);
}

.modal__close::before {
  content: '×';
  font-size: var(--text-2xl);
  line-height: 1;
}

/* ============================================================================
   MODAL BODY
   ============================================================================ */

.modal__body {
  padding: var(--space-6);
  overflow-y: auto;
  overflow-x: hidden;
  flex: 1 1 auto;
  min-height: 0;
  color: var(--color-gray-700);
  font-size: var(--text-base);
  line-height: 1.6;
}

.modal__body::-webkit-scrollbar {
  width: var(--space-2);
}

.modal__body::-webkit-scrollbar-track {
  background: var(--color-gray-100);
  border-radius: var(--radius-md);
}

.modal__body::-webkit-scrollbar-thumb {
  background: var(--color-gray-300);
  border-radius: var(--radius-md);
}

.modal__body::-webkit-scrollbar-thumb:hover {
  background: var(--color-gray-400);
}

/* Remove top padding if header exists */
.modal__header + .modal__body {
  padding-top: var(--space-6);
}

/* Remove bottom padding if footer exists */
.modal__body + .modal__footer {
  padding-top: 0;
}

/* ============================================================================
   MODAL FOOTER
   ============================================================================ */

.modal__footer {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-3);
  padding: var(--space-6);
  border-top: var(--border-width) solid var(--color-gray-200);
}

.modal__footer-end {
  justify-content: flex-end;
}

.modal__footer-center {
  justify-content: center;
}

/* ============================================================================
   MODAL VARIANTS
   ============================================================================ */

/* Confirmation Dialog */
.modal--confirm .modal__body {
  text-align: center;
  padding: var(--space-8) var(--space-6);
}

.modal__confirm-icon {
  width: var(--icon-3xl);
  height: var(--icon-3xl);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto var(--space-4);
  font-size: var(--text-3xl);
}

.modal__confirm-icon.icon-warning {
  background-color: var(--color-warning-100);
  color: var(--color-warning-600);
}

.modal__confirm-icon.icon-error {
  background-color: var(--color-error-100);
  color: var(--color-error-600);
}

.modal__confirm-icon.icon-success {
  background-color: var(--color-success-100);
  color: var(--color-success-600);
}

.modal__confirm-icon.icon-info {
  background-color: var(--color-primary-100);
  color: var(--color-primary-600);
}

.modal__confirm-title {
  font-size: var(--text-xl);
  font-weight: var(--font-weight-semibold);
  color: var(--color-gray-900);
  margin-bottom: var(--space-2);
}

.modal__confirm-message {
  font-size: var(--text-base);
  color: var(--color-gray-600);
  margin-bottom: var(--space-6);
}

/* Loading Modal */
.modal-loading .modal__body {
  text-align: center;
  padding: var(--space-12) var(--space-6);
}

.modal__loading-spinner {
  width: var(--icon-2xl);
  height: var(--icon-2xl);
  border: var(--border-width-heavy) solid var(--color-gray-200);
  border-top-color: var(--color-primary-600);
  border-radius: 50%;
  margin: 0 auto var(--space-4);
  animation: spin var(--duration-200) linear infinite;
}

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

.modal__loading-message {
  font-size: var(--text-base);
  color: var(--color-gray-600);
}

/* Error Modal (for destructive actions) */
.modal-error .modal__header {
  background-color: var(--color-error-50);
  border-bottom-color: var(--color-error-200);
}

.modal-error .modal__title {
  color: var(--color-error-700);
}

/* ============================================================================
   NESTED MODALS
   ============================================================================ */

.modal__backdrop[data-modal-level="2"] {
  z-index: calc(var(--z-modal) + 10);
  background-color: var(--bg-overlay-light);
}

.modal__backdrop[data-modal-level="3"] {
  z-index: calc(var(--z-modal) + 20);
  background-color: var(--bg-overlay-lighter);
}

/* ============================================================================
   MODAL UTILITIES
   ============================================================================ */

/* Prevent body scroll when modal is open */
body.modal--open {
  overflow: hidden;
}

/* No header variant */
.modal-no-header .modal__body {
  border-radius: var(--radius-lg) var(--radius-lg) 0 0;
}

/* No footer variant */
.modal-no-footer .modal__body {
  border-radius: 0 0 var(--radius-lg) var(--radius-lg);
}

/* No header and no footer */
.modal-no-header.modal-no-footer .modal__body {
  border-radius: var(--radius-lg);
}

/* Image in modal */
.modal__body img {
  max-width: 100%;
  height: auto;
  border-radius: var(--radius-md);
}

/* Form in modal */
.modal__body form {
  margin-bottom: 0;
}

/* Pre/Code in modal */
.modal__body pre {
  display: block;
  width: 100%;
  padding: var(--space-3) var(--space-4);
  font-size: var(--text-base);
  line-height: var(--leading-tight);
  color: var(--text-primary);
  background-color: var(--bg-surface);
  border: var(--border-width-thick) solid var(--border-base);
  border-radius: var(--radius-lg);
  overflow-x: auto;
  overflow-wrap: break-word;
  word-wrap: break-word;
  word-break: break-word;
  white-space: pre-wrap;
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  max-width: 100%;
  box-sizing: border-box;
  max-height: var(--space-72);
  overflow-y: auto;
}

/* Stats grid in modal */
.modal__body .stats-grid {
  margin-bottom: var(--space-4);
}

/* ============================================================================
   DARK MODE SUPPORT
   ============================================================================ */

:root[data-theme="dark"] .modal__backdrop {
  background-color: var(--bg-overlay-dark);
}

:root[data-theme="dark"] .modal {
  background-color: var(--color-gray-800);
  box-shadow: var(--shadow-2xl), 0 0 0 1px var(--color-gray-700);
}

:root[data-theme="dark"] .modal__header {
  border-bottom-color: var(--color-gray-700);
}

:root[data-theme="dark"] .modal__title {
  color: var(--color-gray-100);
}

:root[data-theme="dark"] .modal__close {
  color: var(--color-gray-400);
}

:root[data-theme="dark"] .modal__close:hover {
  background-color: var(--color-gray-700);
  color: var(--color-gray-200);
}

:root[data-theme="dark"] .modal__body {
  color: var(--color-gray-300);
}

:root[data-theme="dark"] .modal__footer {
  border-top-color: var(--color-gray-700);
}

:root[data-theme="dark"] .modal__confirm-title {
  color: var(--color-gray-100);
}

:root[data-theme="dark"] .modal__confirm-message {
  color: var(--color-gray-400);
}

/* Override inline styles in dark mode for better contrast */
:root[data-theme="dark"] .modal--confirm p[style*="color"] {
  color: var(--color-gray-200) !important;
}

:root[data-theme="dark"] .modal__loading-message {
  color: var(--color-gray-400);
}

:root[data-theme="dark"] .modal-error .modal__header {
  background-color: var(--color-error-900);
  border-bottom-color: var(--color-error-700);
}

:root[data-theme="dark"] .modal-error .modal__title {
  color: var(--color-error-300);
}

/* Alert variants dark mode */
:root[data-theme="dark"] .modal__alert-info {
  background-color: var(--color-gray-800);
}

:root[data-theme="dark"] .modal__alert--success {
  background-color: var(--color-gray-800);
}

:root[data-theme="dark"] .modal__alert--warning {
  background-color: var(--color-gray-800);
}

:root[data-theme="dark"] .modal__alert--error {
  background-color: var(--color-gray-800);
}

/* Pre/Code dark mode */
:root[data-theme="dark"] .modal__body pre {
  color: var(--text-primary);
  background-color: var(--bg-surface);
  border-color: var(--border-base);
}

/* ============================================================================
   RESPONSIVE BREAKPOINTS
   ============================================================================ */

@media (max-width: 768px) {
  .modal__backdrop {
    padding: var(--space-2);
  }

  .modal {
    max-height: calc(100vh - var(--space-4));
  }

  .modal__header {
    padding: var(--space-4);
  }

  .modal__title {
    font-size: var(--text-lg);
  }

  .modal__body {
    padding: var(--space-4);
  }

  .modal__footer {
    padding: var(--space-4);
    flex-direction: column-reverse;
  }

  .modal__footer .btn {
    width: 100%;
  }

  /* Make all modals nearly full-screen on mobile */
  .modal--sm,
  .modal--md,
  .modal--lg,
  .modal--xl {
    max-width: 100%;
  }

  .modal--full {
    max-width: 100%;
    max-height: 100vh;
    border-radius: 0;
  }

  .modal__backdrop.modal-top {
    padding-top: var(--space-2);
  }
}

@media (max-width: 640px) {
  .modal__header {
    padding: var(--space-3);
  }

  .modal__body {
    padding: var(--space-3);
  }

  .modal__footer {
    padding: var(--space-3);
  }

  .modal--confirm .modal__body {
    padding: var(--space-6) var(--space-3);
  }

  .modal__confirm-icon {
    width: var(--icon-2xl);
    height: var(--icon-2xl);
    font-size: var(--text-2xl);
  }
}

/* ============================================================================
   MODAL CONTENT UTILITIES
   ============================================================================ */

/**
 * Pre-formatted text blocks in modals
 * Used for code, JSON data, logs, etc.
 * Automatically adapts to light/dark themes
 */
.modal__body pre,
.modal__body .log-details-pre {
  background: var(--color-gray-100);
  color: var(--color-text);
  padding: var(--space-3);
  border-radius: var(--radius-md);
  overflow-x: auto;
  font-family: 'Courier New', 'Monaco', 'Menlo', monospace;
  font-size: var(--text-sm);
  line-height: 1.6;
  border: 1px solid var(--color-border);
  margin: var(--space-2) 0;
  max-width: 100%;
  word-wrap: break-word;
}

/* Dark mode overrides for pre elements */
[data-theme="dark"] .modal__body pre,
[data-theme="dark"] .modal__body .log-details-pre {
  background: var(--color-gray-800);
  color: var(--color-gray-100);
  border-color: var(--color-gray-700);
}

/**
 * Modal content wrapper for structured data
 * Ensures consistent spacing and typography
 */
.modal__body .log-details-content,
.modal__body .details-content {
  color: var(--color-text);
}

.modal__body .log-details-content p,
.modal__body .details-content p {
  margin-bottom: var(--space-2);
  line-height: 1.6;
}

.modal__body .log-details-content strong,
.modal__body .details-content strong {
  color: var(--color-text);
  font-weight: 600;
}

.modal__body .log-details-content em,
.modal__body .details-content em {
  color: var(--color-text-secondary);
}

/**
 * Code blocks within modal content
 * Inline code snippets
 */
.modal__body code {
  background: var(--color-gray-100);
  color: var(--color-primary);
  padding: var(--space-0.5) var(--space-1.5);
  border-radius: var(--radius-sm);
  font-family: 'Courier New', 'Monaco', 'Menlo', monospace;
  font-size: var(--text-sm);
}

[data-theme="dark"] .modal__body code {
  background: var(--color-gray-800);
  color: var(--color-primary-light);
}