/**
 * EGM StyleKit v2.0
 * Design System with CSS Custom Properties & Tailwind Interop
 * 
 * @package EGM_StyleKit
 * @version 2.0.0
 */

/* ========================================
   1. CSS CUSTOM PROPERTIES (Design Tokens)
   ======================================== */

:root {
  /* === Colors - Primary === */
  --sk-primary-50: #eff6ff;
  --sk-primary-100: #dbeafe;
  --sk-primary-200: #bfdbfe;
  --sk-primary-300: #93c5fd;
  --sk-primary-400: #60a5fa;
  --sk-primary-500: #3b82f6;
  --sk-primary-600: #2563eb;
  --sk-primary-700: #1d4ed8;
  --sk-primary-800: #1e40af;
  --sk-primary-900: #1e3a8a;

  /* === Colors - Secondary === */
  --sk-secondary-50: #f0fdf4;
  --sk-secondary-100: #dcfce7;
  --sk-secondary-200: #bbf7d0;
  --sk-secondary-300: #86efac;
  --sk-secondary-400: #4ade80;
  --sk-secondary-500: #22c55e;
  --sk-secondary-600: #16a34a;
  --sk-secondary-700: #15803d;
  --sk-secondary-800: #166534;
  --sk-secondary-900: #14532d;

  /* === Colors - Accent === */
  --sk-accent-50: #faf5ff;
  --sk-accent-100: #f3e8ff;
  --sk-accent-200: #e9d5ff;
  --sk-accent-300: #d8b4fe;
  --sk-accent-400: #c084fc;
  --sk-accent-500: #a855f7;
  --sk-accent-600: #9333ea;
  --sk-accent-700: #7e22ce;
  --sk-accent-800: #6b21a8;
  --sk-accent-900: #581c87;

  /* === Colors - Neutral === */
  --sk-gray-50: #f9fafb;
  --sk-gray-100: #f3f4f6;
  --sk-gray-200: #e5e7eb;
  --sk-gray-300: #d1d5db;
  --sk-gray-400: #9ca3af;
  --sk-gray-500: #6b7280;
  --sk-gray-600: #4b5563;
  --sk-gray-700: #374151;
  --sk-gray-800: #1f2937;
  --sk-gray-900: #111827;

  /* === Colors - Semantic === */
  --sk-success-50: #f0fdf4;
  --sk-success-100: #dcfce7;
  --sk-success-500: #22c55e;
  --sk-success-600: #16a34a;
  --sk-success-700: #15803d;

  --sk-warning-50: #fffbeb;
  --sk-warning-100: #fef3c7;
  --sk-warning-500: #f59e0b;
  --sk-warning-600: #d97706;
  --sk-warning-700: #b45309;

  --sk-error-50: #fef2f2;
  --sk-error-100: #fee2e2;
  --sk-error-500: #ef4444;
  --sk-error-600: #dc2626;
  --sk-error-700: #b91c1c;

  --sk-info-50: #eff6ff;
  --sk-info-100: #dbeafe;
  --sk-info-500: #3b82f6;
  --sk-info-600: #2563eb;
  --sk-info-700: #1d4ed8;

  /* === Spacing === */
  --sk-space-1: 0.25rem;   /* 4px */
  --sk-space-2: 0.5rem;    /* 8px */
  --sk-space-3: 0.75rem;   /* 12px */
  --sk-space-4: 1rem;      /* 16px */
  --sk-space-5: 1.25rem;   /* 20px */
  --sk-space-6: 1.5rem;    /* 24px */
  --sk-space-8: 2rem;      /* 32px */
  --sk-space-10: 2.5rem;   /* 40px */
  --sk-space-12: 3rem;     /* 48px */
  --sk-space-16: 4rem;     /* 64px */
  --sk-space-20: 5rem;     /* 80px */

  /* === Typography === */
  --sk-font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --sk-font-mono: "SF Mono", Consolas, "Liberation Mono", Menlo, Courier, monospace;

  --sk-text-xs: 0.75rem;     /* 12px */
  --sk-text-sm: 0.875rem;    /* 14px */
  --sk-text-base: 1rem;      /* 16px */
  --sk-text-lg: 1.125rem;    /* 18px */
  --sk-text-xl: 1.25rem;     /* 20px */
  --sk-text-2xl: 1.5rem;     /* 24px */
  --sk-text-3xl: 1.875rem;   /* 30px */
  --sk-text-4xl: 2.25rem;    /* 36px */
  --sk-text-5xl: 3rem;       /* 48px */

  --sk-font-normal: 400;
  --sk-font-medium: 500;
  --sk-font-semibold: 600;
  --sk-font-bold: 700;

  --sk-leading-tight: 1.25;
  --sk-leading-normal: 1.5;
  --sk-leading-relaxed: 1.75;

  /* === Border Radius === */
  --sk-radius-sm: 0.25rem;   /* 4px */
  --sk-radius-md: 0.375rem;  /* 6px */
  --sk-radius-lg: 0.5rem;    /* 8px */
  --sk-radius-xl: 0.75rem;   /* 12px */
  --sk-radius-2xl: 1rem;     /* 16px */
  --sk-radius-full: 9999px;

  /* === Shadows === */
  --sk-shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
  --sk-shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
  --sk-shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
  --sk-shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1), 0 8px 10px -6px rgb(0 0 0 / 0.1);
  --sk-shadow-2xl: 0 25px 50px -12px rgb(0 0 0 / 0.25);

  /* === Transitions === */
  --sk-transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
  --sk-transition-base: 200ms cubic-bezier(0.4, 0, 0.2, 1);
  --sk-transition-slow: 300ms cubic-bezier(0.4, 0, 0.2, 1);

  /* === Z-Index === */
  --sk-z-dropdown: 1000;
  --sk-z-sticky: 1020;
  --sk-z-fixed: 1030;
  --sk-z-modal-backdrop: 1040;
  --sk-z-modal: 1050;
  --sk-z-popover: 1060;
  --sk-z-tooltip: 1070;
  --sk-z-toast: 1080;

  /* === Breakpoints (for JS) === */
  --sk-breakpoint-sm: 640px;
  --sk-breakpoint-md: 768px;
  --sk-breakpoint-lg: 1024px;
  --sk-breakpoint-xl: 1280px;
  --sk-breakpoint-2xl: 1536px;
}

/* === Dark Theme === */
[data-theme="dark"] {
  --sk-bg-base: var(--sk-gray-900);
  --sk-bg-surface: var(--sk-gray-800);
  --sk-bg-elevated: var(--sk-gray-700);
  --sk-text-primary: var(--sk-gray-50);
  --sk-text-secondary: var(--sk-gray-300);
  --sk-text-muted: var(--sk-gray-400);
  --sk-border-color: var(--sk-gray-700);
}

/* === Light Theme (Default) === */
:root, [data-theme="light"] {
  --sk-bg-base: #ffffff;
  --sk-bg-surface: var(--sk-gray-50);
  --sk-bg-elevated: #ffffff;
  --sk-text-primary: var(--sk-gray-900);
  --sk-text-secondary: var(--sk-gray-600);
  --sk-text-muted: var(--sk-gray-500);
  --sk-border-color: var(--sk-gray-200);
}

/* === Educational Theme === */
[data-theme="educational"] {
  --sk-primary-500: #8b5cf6;
  --sk-primary-600: #7c3aed;
  --sk-secondary-500: #ec4899;
  --sk-accent-500: #f59e0b;
}

/* === Theme precedence fix: re-apply dark variables after light so dark wins in cascade === */
[data-theme="dark"] {
  --sk-bg-base: var(--sk-gray-900);
  --sk-bg-surface: var(--sk-gray-800);
  --sk-bg-elevated: var(--sk-gray-700);
  --sk-text-primary: var(--sk-gray-50);
  --sk-text-secondary: var(--sk-gray-300);
  --sk-text-muted: var(--sk-gray-400);
  --sk-border-color: var(--sk-gray-700);
}

/* Override modal background for dark theme */
[data-theme="dark"] .sk-modal {
  background-color: var(--sk-gray-800);
  border-color: var(--sk-gray-600);
}

/* ========================================
   2. RESET & BASE STYLES
   ======================================== */

.sk-root {
  font-family: var(--sk-font-sans);
  font-size: var(--sk-text-base);
  line-height: var(--sk-leading-normal);
  color: var(--sk-text-primary);
  background-color: var(--sk-bg-base);
}

.sk-root *,
.sk-root *::before,
.sk-root *::after {
  box-sizing: border-box;
}

/* === Focus Visible (Accessibility) === */
.sk-root *:focus-visible {
  outline: 2px solid var(--sk-primary-500);
  outline-offset: 2px;
}

/* === Screen Reader Only === */
.sk-sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border-width: 0;
}

/* ========================================
   3. BUTTON COMPONENT
   ======================================== */

.sk-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--sk-space-2);
  padding: var(--sk-space-3) var(--sk-space-5);
  font-size: var(--sk-text-sm);
  font-weight: var(--sk-font-medium);
  line-height: 1.5;
  border-radius: var(--sk-radius-md);
  border: 1px solid transparent;
  cursor: pointer;
  transition: all var(--sk-transition-fast);
  text-decoration: none;
  white-space: nowrap;
}

.sk-btn:focus-visible {
  outline: 2px solid var(--sk-primary-500);
  outline-offset: 2px;
}

.sk-btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

/* Button sizes */
.sk-btn-sm {
  padding: var(--sk-space-2) var(--sk-space-3);
  font-size: var(--sk-text-xs);
}

.sk-btn-lg {
  padding: var(--sk-space-4) var(--sk-space-6);
  font-size: var(--sk-text-base);
}

/* Button Variants */
.sk-btn-primary {
  background-color: var(--sk-primary-600);
  color: white;
}

.sk-btn-primary:hover:not(:disabled) {
  background-color: var(--sk-primary-700);
}

.sk-btn-secondary {
  background-color: var(--sk-gray-200);
  color: var(--sk-gray-900);
}

.sk-btn-secondary:hover:not(:disabled) {
  background-color: var(--sk-gray-300);
}

.sk-btn-success {
  background-color: var(--sk-success-600);
  color: white;
}

.sk-btn-success:hover:not(:disabled) {
  background-color: var(--sk-success-700);
}

.sk-btn-danger {
  background-color: var(--sk-error-600);
  color: white;
}

.sk-btn-danger:hover:not(:disabled) {
  background-color: var(--sk-error-700);
}

.sk-btn-warning {
  background-color: var(--sk-warning-500);
  color: #1f2937; /* gray-800 for contrast on amber */
}

.sk-btn-warning:hover:not(:disabled) {
  background-color: var(--sk-warning-600);
}

.sk-btn-ghost {
  background-color: transparent;
  color: var(--sk-text-primary);
}

.sk-btn-ghost:hover:not(:disabled) {
  background-color: var(--sk-gray-100);
}

/* Outline variant */
.sk-btn-outline {
  background-color: transparent;
  border-color: var(--sk-border-color);
  color: var(--sk-text-primary);
}

.sk-btn-outline:hover:not(:disabled) {
  background-color: var(--sk-gray-100);
}

/* Button Sizes */
.sk-btn-sm {
  padding: var(--sk-space-1) var(--sk-space-3);
  font-size: var(--sk-text-xs);
}

.sk-btn-lg {
  padding: var(--sk-space-3) var(--sk-space-6);
  font-size: var(--sk-text-base);
}

.sk-btn-icon {
  padding: var(--sk-space-2);
  aspect-ratio: 1;
}

/* ========================================
   4. CARD COMPONENT
   ======================================== */

.sk-card {
  background-color: var(--sk-bg-elevated);
  border: 1px solid var(--sk-border-color);
  border-radius: var(--sk-radius-lg);
  box-shadow: var(--sk-shadow-sm);
  overflow: hidden;
  margin-bottom: var(--sk-space-6); /* Espacement entre cartes */
}

.sk-card-header {
  padding: var(--sk-space-6) var(--sk-space-6);
  border-bottom: 1px solid var(--sk-border-color);
}

.sk-card-title {
  font-size: var(--sk-text-xl);
  font-weight: var(--sk-font-semibold);
  color: var(--sk-text-primary);
  margin: 0;
  line-height: var(--sk-leading-tight);
}

.sk-card-description {
  font-size: var(--sk-text-sm);
  color: var(--sk-text-secondary);
  margin-top: var(--sk-space-2);
  line-height: var(--sk-leading-relaxed);
}

.sk-card-body {
  padding: var(--sk-space-6);
}

.sk-card-content {
  padding: var(--sk-space-6);
}

.sk-card-footer {
  padding: var(--sk-space-4) var(--sk-space-6);
  border-top: 1px solid var(--sk-border-color);
  background-color: var(--sk-bg-surface);
}

.sk-card-hover:hover {
  box-shadow: var(--sk-shadow-md);
  transform: translateY(-2px);
  transition: all var(--sk-transition-base);
}

/* ========================================
   5. TABLE COMPONENT
   ======================================== */

.sk-table-container {
  overflow-x: auto;
  border: 1px solid var(--sk-border-color);
  border-radius: var(--sk-radius-lg);
  margin-bottom: var(--sk-space-6);
}

.sk-table {
  width: 100%;
  border-collapse: collapse;
  font-size: var(--sk-text-sm);
}

.sk-table thead {
  background-color: var(--sk-bg-surface);
  border-bottom: 2px solid var(--sk-border-color);
}

.sk-table th {
  padding: var(--sk-space-4) var(--sk-space-4);
  text-align: left;
  font-weight: var(--sk-font-semibold);
  color: var(--sk-text-primary);
  font-size: var(--sk-text-xs);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  line-height: var(--sk-leading-tight);
}

.sk-table td {
  padding: var(--sk-space-4) var(--sk-space-4);
  border-top: 1px solid var(--sk-border-color);
  color: var(--sk-text-secondary);
  line-height: var(--sk-leading-relaxed);
}

.sk-table tbody tr:hover {
  background-color: var(--sk-bg-surface);
}

.sk-table-striped tbody tr:nth-child(even) {
  background-color: var(--sk-bg-surface);
}

/* ========================================
   6. MODAL COMPONENT
   ======================================== */

.sk-modal-backdrop {
  position: fixed;
  inset: 0;
  background-color: rgba(0, 0, 0, 0.75);
  z-index: var(--sk-z-modal-backdrop);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--sk-space-4);
  animation: sk-fade-in var(--sk-transition-fast);
}

.sk-modal {
  background-color: #ffffff;
  border: 2px solid var(--sk-border-color);
  border-radius: var(--sk-radius-xl);
  box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
  max-width: 32rem;
  width: 100%;
  max-height: 90vh;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  z-index: var(--sk-z-modal);
  animation: sk-scale-in var(--sk-transition-base);
  position: relative;
  opacity: 1;
}

.sk-modal-header,
.sk-modal-body,
.sk-modal-footer {
  background-color: #ffffff;
  opacity: 1;
}

/* Modal size variants */
.sk-modal-sm { max-width: 24rem; }
.sk-modal-lg { max-width: 48rem; }
.sk-modal-xl { max-width: 64rem; }

.sk-modal-header {
  padding: var(--sk-space-6);
  border-bottom: 1px solid var(--sk-border-color);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.sk-modal-title {
  font-size: var(--sk-text-xl);
  font-weight: var(--sk-font-semibold);
  color: var(--sk-text-primary);
  margin: 0;
}

.sk-modal-close {
  padding: var(--sk-space-2);
  border: none;
  background: transparent;
  cursor: pointer;
  color: var(--sk-text-muted);
  border-radius: var(--sk-radius-md);
  transition: all var(--sk-transition-fast);
}

.sk-modal-close:hover {
  background-color: var(--sk-bg-surface);
  color: var(--sk-text-primary);
}

.sk-modal-body {
  padding: var(--sk-space-6);
  overflow-y: auto;
  flex: 1;
}

.sk-modal-footer {
  padding: var(--sk-space-6);
  border-top: 1px solid var(--sk-border-color);
  display: flex;
  gap: var(--sk-space-3);
  justify-content: flex-end;
}

/* ========================================
   7. TABS COMPONENT
   ======================================== */

.sk-tabs {
  width: 100%;
}

.sk-tabs-list,
.sk-tabs-nav {
  display: flex;
  gap: var(--sk-space-1);
  border-bottom: 2px solid var(--sk-border-color);
  padding: 0;
  margin: 0;
  list-style: none;
}

.sk-tabs-trigger,
.sk-tab-btn {
  padding: var(--sk-space-3) var(--sk-space-5);
  font-size: var(--sk-text-sm);
  font-weight: var(--sk-font-medium);
  color: var(--sk-text-secondary);
  background: transparent;
  border: none;
  border-bottom: 3px solid transparent;
  margin-bottom: -2px;
  cursor: pointer;
  transition: all var(--sk-transition-fast);
  border-radius: var(--sk-radius-md) var(--sk-radius-md) 0 0;
}

.sk-tabs-trigger:hover,
.sk-tab-btn:hover {
  color: var(--sk-text-primary);
  background-color: var(--sk-bg-surface);
}

.sk-tabs-trigger[aria-selected="true"],
.sk-tabs-trigger.active,
.sk-tab-btn.active {
  color: var(--sk-primary-600);
  border-bottom-color: var(--sk-primary-600);
  background-color: var(--sk-primary-50);
}

.sk-tabs-content,
.sk-tab-content {
  padding: var(--sk-space-6);
}

.sk-tabs-content[hidden],
.sk-tab-content:not(.active) {
  display: none;
}

/* ========================================
   8. BADGE COMPONENT
   ======================================== */

.sk-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--sk-space-1);
  padding: var(--sk-space-1) var(--sk-space-2);
  font-size: var(--sk-text-xs);
  font-weight: var(--sk-font-medium);
  border-radius: var(--sk-radius-full);
  line-height: 1;
}

/* Badge sizes */
.sk-badge-sm {
  padding: 0.125rem var(--sk-space-2);
  font-size: 0.6875rem;
}

.sk-badge-lg {
  padding: var(--sk-space-2) var(--sk-space-4);
  font-size: var(--sk-text-sm);
}

.sk-badge-primary {
  background-color: var(--sk-primary-100);
  color: var(--sk-primary-700);
}

.sk-badge-secondary {
  background-color: var(--sk-secondary-100);
  color: var(--sk-secondary-700);
}

.sk-badge-success {
  background-color: var(--sk-success-100);
  color: var(--sk-success-700);
}

.sk-badge-warning {
  background-color: var(--sk-warning-100);
  color: var(--sk-warning-700);
}

.sk-badge-error {
  background-color: var(--sk-error-100);
  color: var(--sk-error-700);
}

.sk-badge-info {
  background-color: var(--sk-info-100);
  color: var(--sk-info-700);
}

.sk-badge-gray {
  background-color: var(--sk-gray-100);
  color: var(--sk-gray-700);
}

/* ========================================
   9. TOAST COMPONENT
   ======================================== */

.sk-toast-container {
  position: fixed;
  top: var(--sk-space-4);
  right: var(--sk-space-4);
  z-index: var(--sk-z-toast);
  display: flex;
  flex-direction: column;
  gap: var(--sk-space-3);
  max-width: 24rem;
}

.sk-toast {
  background-color: var(--sk-bg-elevated);
  border: 1px solid var(--sk-border-color);
  border-radius: var(--sk-radius-lg);
  box-shadow: var(--sk-shadow-lg);
  padding: var(--sk-space-4);
  display: flex;
  gap: var(--sk-space-3);
  align-items: flex-start;
  animation: sk-slide-in-right var(--sk-transition-base);
}

.sk-toast-icon {
  flex-shrink: 0;
  width: 1.25rem;
  height: 1.25rem;
}

.sk-toast-content {
  flex: 1;
}

.sk-toast-title {
  font-size: var(--sk-text-sm);
  font-weight: var(--sk-font-semibold);
  color: var(--sk-text-primary);
  margin: 0 0 var(--sk-space-1) 0;
}

.sk-toast-message {
  font-size: var(--sk-text-sm);
  color: var(--sk-text-secondary);
  margin: 0;
}

.sk-toast-close {
  flex-shrink: 0;
  padding: var(--sk-space-1);
  border: none;
  background: transparent;
  cursor: pointer;
  color: var(--sk-text-muted);
  border-radius: var(--sk-radius-sm);
}

.sk-toast-close:hover {
  background-color: var(--sk-bg-surface);
}

.sk-toast-success {
  border-left: 4px solid var(--sk-success-500);
}

.sk-toast-error {
  border-left: 4px solid var(--sk-error-500);
}

.sk-toast-warning {
  border-left: 4px solid var(--sk-warning-500);
}

.sk-toast-info {
  border-left: 4px solid var(--sk-info-500);
}

/* ========================================
   10. SPINNER COMPONENT
   ======================================== */

.sk-spinner {
  display: inline-block;
  width: 1rem;
  height: 1rem;
  border: 2px solid var(--sk-gray-300);
  border-top-color: var(--sk-primary-600);
  border-radius: 50%;
  animation: sk-spin 0.6s linear infinite;
}

.sk-spinner-lg {
  width: 2rem;
  height: 2rem;
  border-width: 3px;
}

.sk-spinner-sm {
  width: 0.75rem;
  height: 0.75rem;
  border-width: 2px;
}

/* ========================================
   11. EMPTY STATE COMPONENT
   ======================================== */

.sk-empty-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: var(--sk-space-16) var(--sk-space-8);
  text-align: center;
}

.sk-empty-state-icon {
  width: 4rem;
  height: 4rem;
  color: var(--sk-text-muted);
  margin-bottom: var(--sk-space-6);
}

.sk-empty-state-title {
  font-size: var(--sk-text-xl);
  font-weight: var(--sk-font-semibold);
  color: var(--sk-text-primary);
  margin: 0 0 var(--sk-space-3) 0;
  line-height: var(--sk-leading-tight);
}

.sk-empty-state-description {
  font-size: var(--sk-text-base);
  color: var(--sk-text-secondary);
  margin: 0 0 var(--sk-space-8) 0;
  max-width: 32rem;
  line-height: var(--sk-leading-relaxed);
}

/* ========================================
   12. PAGINATION COMPONENT
   ======================================== */

.sk-pagination {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--sk-space-2);
  margin: var(--sk-space-6) 0;
}

.sk-pagination-btn {
  padding: var(--sk-space-2) var(--sk-space-3);
  font-size: var(--sk-text-sm);
  font-weight: var(--sk-font-medium);
  color: var(--sk-text-secondary);
  background-color: transparent;
  border: 1px solid var(--sk-border-color);
  border-radius: var(--sk-radius-md);
  cursor: pointer;
  transition: all var(--sk-transition-fast);
  min-width: 2.25rem;
  min-height: 2.25rem;
}

.sk-pagination-btn:hover:not(:disabled) {
  background-color: var(--sk-bg-surface);
  border-color: var(--sk-primary-300);
  color: var(--sk-primary-600);
}

.sk-pagination-btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.sk-pagination-btn-active {
  background-color: var(--sk-primary-600);
  border-color: var(--sk-primary-600);
  color: white;
}

.sk-pagination-btn-active:hover {
  background-color: var(--sk-primary-700);
}

.sk-pagination-ellipsis {
  padding: var(--sk-space-2) var(--sk-space-1);
  color: var(--sk-text-muted);
}

/* ========================================
   13. FORM INPUTS
   ======================================== */

.sk-form-group {
  margin-bottom: var(--sk-space-4);
}

.sk-label {
  display: block;
  font-size: var(--sk-text-sm);
  font-weight: var(--sk-font-medium);
  color: var(--sk-text-primary);
  margin-bottom: var(--sk-space-2);
}

.sk-label-required::after {
  content: "*";
  color: var(--sk-error-500);
  margin-left: var(--sk-space-1);
}

.sk-input,
.sk-select,
.sk-textarea {
  width: 100%;
  padding: var(--sk-space-2) var(--sk-space-3);
  font-size: var(--sk-text-sm);
  color: var(--sk-text-primary);
  background-color: var(--sk-bg-base);
  border: 1px solid var(--sk-border-color);
  border-radius: var(--sk-radius-md);
  transition: all var(--sk-transition-fast);
}

.sk-input:focus,
.sk-select:focus,
.sk-textarea:focus {
  outline: none;
  border-color: var(--sk-primary-500);
  box-shadow: 0 0 0 3px var(--sk-primary-100);
}

.sk-input:disabled,
.sk-select:disabled,
.sk-textarea:disabled {
  opacity: 0.6;
  cursor: not-allowed;
  background-color: var(--sk-bg-surface);
}

.sk-input-error,
.sk-select-error,
.sk-textarea-error {
  border-color: var(--sk-error-500);
  background-color: var(--sk-error-100);
  border-left: 3px solid var(--sk-error-500);
}

.sk-input-error:focus,
.sk-select-error:focus,
.sk-textarea-error:focus {
  border-color: var(--sk-error-500);
  box-shadow: 0 0 0 3px var(--sk-error-100);
}

/* Success state */
.sk-input-success,
.sk-select-success,
.sk-textarea-success {
  border-color: var(--sk-success-500);
  background-color: var(--sk-success-100);
  border-left: 3px solid var(--sk-success-500);
}

/* Placeholder colors for states */
.sk-input-error::placeholder,
.sk-textarea-error::placeholder {
  color: var(--sk-error-600);
}

.sk-input-success::placeholder,
.sk-textarea-success::placeholder {
  color: var(--sk-success-600);
}

.sk-input-success:focus,
.sk-select-success:focus,
.sk-textarea-success:focus {
  border-color: var(--sk-success-500);
  box-shadow: 0 0 0 3px var(--sk-success-100);
}

.sk-textarea {
  min-height: 6rem;
  resize: vertical;
}

.sk-input-hint {
  display: block;
  margin-top: var(--sk-space-1);
  font-size: var(--sk-text-xs);
  color: var(--sk-text-muted);
}

.sk-input-error-message {
  display: block;
  margin-top: var(--sk-space-1);
  font-size: var(--sk-text-xs);
  color: var(--sk-error-600);
}

/* Checkbox & Radio */
.sk-checkbox,
.sk-radio {
  width: 1rem;
  height: 1rem;
  cursor: pointer;
  border: 1px solid var(--sk-border-color);
  border-radius: var(--sk-radius-sm);
  accent-color: var(--sk-primary-600);
}

.sk-radio {
  border-radius: 50%;
}

/* ========================================
   14. ANIMATIONS
   ======================================== */

@keyframes sk-fade-in {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}

@keyframes sk-scale-in {
  from {
    opacity: 0;
    transform: scale(0.95);
  }
  to {
    opacity: 1;
    transform: scale(1);
  }
}

@keyframes sk-slide-in-right {
  from {
    opacity: 0;
    transform: translateX(100%);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes sk-spin {
  from {
    transform: rotate(0deg);
  }
  to {
    transform: rotate(360deg);
  }
}

/* ========================================
   15. UTILITY CLASSES (Tailwind-like)
   ======================================== */

.sk-container {
  width: 100%;
  max-width: 80rem;
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--sk-space-4);
  padding-right: var(--sk-space-4);
}

.sk-flex {
  display: flex;
}

.sk-flex-col {
  flex-direction: column;
}

.sk-items-center {
  align-items: center;
}

.sk-justify-between {
  justify-content: space-between;
}

.sk-gap-2 {
  gap: var(--sk-space-2);
}

.sk-gap-4 {
  gap: var(--sk-space-4);
}

.sk-gap-6 {
  gap: var(--sk-space-6);
}

.sk-mt-4 {
  margin-top: var(--sk-space-4);
}

.sk-mb-4 {
  margin-bottom: var(--sk-space-4);
}

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

.sk-p-6 {
  padding: var(--sk-space-6);
}

.sk-text-center {
  text-align: center;
}

.sk-font-bold {
  font-weight: var(--sk-font-bold);
}

.sk-text-muted {
  color: var(--sk-text-muted);
}

.sk-text-sm {
  font-size: var(--sk-text-sm);
}

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

.sk-text-xl {
  font-size: var(--sk-text-xl);
}

.sk-rounded-lg {
  border-radius: var(--sk-radius-lg);
}

.sk-shadow-md {
  box-shadow: var(--sk-shadow-md);
}

/* ========================================
   14. ALERT / NOTICE COMPONENT
   ======================================== */

.sk-alert {
  display: flex;
  gap: var(--sk-space-3);
  padding: var(--sk-space-4) var(--sk-space-5);
  border-radius: var(--sk-radius-lg);
  border-left: 4px solid;
  margin-bottom: var(--sk-space-6);
  font-size: var(--sk-text-sm);
  line-height: var(--sk-leading-relaxed);
}

.sk-alert-icon {
  flex-shrink: 0;
  width: 1.25rem;
  height: 1.25rem;
  margin-top: 0.125rem;
}

.sk-alert-content {
  flex: 1;
}

.sk-alert-title {
  font-weight: var(--sk-font-semibold);
  margin: 0 0 var(--sk-space-1) 0;
}

.sk-alert-message {
  margin: 0;
  color: inherit;
  opacity: 0.9;
}

.sk-alert-success {
  background-color: var(--sk-success-50);
  border-color: var(--sk-success-500);
  color: var(--sk-success-700);
}

.sk-alert-error {
  background-color: var(--sk-error-50);
  border-color: var(--sk-error-500);
  color: var(--sk-error-700);
}

.sk-alert-warning {
  background-color: var(--sk-warning-50);
  border-color: var(--sk-warning-500);
  color: var(--sk-warning-700);
}

.sk-alert-info {
  background-color: var(--sk-info-50);
  border-color: var(--sk-info-500);
  color: var(--sk-info-700);
}

/* ========================================
   15. LAYOUT UTILITIES
   ======================================== */

/* Container avec max-width et padding complet */
.sk-container {
  max-width: 1280px;
  margin-left: auto;
  margin-right: auto;
  padding: var(--sk-space-8) var(--sk-space-6);
}

/* Page header banner - VRAI BANNER AVEC FOND COLORÉ */
.sk-page-header {
  background: linear-gradient(135deg, var(--sk-primary-600) 0%, var(--sk-primary-700) 100%);
  border-bottom: 3px solid var(--sk-primary-800);
  padding: var(--sk-space-10) 0;
  margin-top: var(--sk-space-6);
  margin-bottom: var(--sk-space-8);
  box-shadow: var(--sk-shadow-md);
}

.sk-page-header .sk-page-title {
  font-size: var(--sk-text-3xl);
  font-weight: var(--sk-font-bold);
  color: white;
  margin: 0 0 var(--sk-space-2) 0;
  line-height: var(--sk-leading-tight);
}

.sk-page-header .sk-page-subtitle {
  font-size: var(--sk-text-base);
  color: rgba(255, 255, 255, 0.9);
  margin: 0;
  line-height: var(--sk-leading-normal);
}

.sk-page-header .sk-container {
  padding-top: 0;
  padding-bottom: 0;
}

.sk-section {
  margin-bottom: var(--sk-space-12);
}

.sk-section-title {
  font-size: var(--sk-text-2xl);
  font-weight: var(--sk-font-bold);
  color: var(--sk-text-primary);
  margin: 0 0 var(--sk-space-6) 0;
  line-height: var(--sk-leading-tight);
}

.sk-section-subtitle {
  font-size: var(--sk-text-lg);
  font-weight: var(--sk-font-semibold);
  color: var(--sk-text-primary);
  margin: 0 0 var(--sk-space-4) 0;
  line-height: var(--sk-leading-tight);
}

.sk-stack {
  display: flex;
  flex-direction: column;
  gap: var(--sk-space-4);
}

.sk-stack-sm {
  gap: var(--sk-space-2);
}

.sk-stack-lg {
  gap: var(--sk-space-6);
}

.sk-inline {
  display: flex;
  align-items: center;
  gap: var(--sk-space-3);
  flex-wrap: wrap;
}

.sk-inline-sm {
  gap: var(--sk-space-2);
}

.sk-inline-lg {
  gap: var(--sk-space-4);
}

.sk-divider {
  height: 1px;
  background-color: var(--sk-border-color);
  margin: var(--sk-space-6) 0;
  border: none;
}

/* ========================================
   16. RESPONSIVE UTILITIES
   ======================================== */

@media (max-width: 640px) {
  .sk-modal {
    max-width: calc(100vw - 2rem);
  }

  .sk-table-container {
    font-size: var(--sk-text-xs);
  }

  .sk-pagination {
    flex-wrap: wrap;
  }
}

@media (min-width: 768px) {
  .sk-container {
    padding-left: var(--sk-space-6);
    padding-right: var(--sk-space-6);
  }
}

/* ========================================
   17. PRINT STYLES
   ======================================== */

@media print {
  .sk-modal-backdrop,
  .sk-toast-container,
  .sk-btn,
  .sk-pagination {
    display: none !important;
  }

  .sk-card {
    box-shadow: none;
    page-break-inside: avoid;
  }
}