/* ========================================
   IA CONSEIL - BACKOFFICE APP
   Design System & Global Styles
   ======================================== */

/* ========================================
   RESET & BASE STYLES
   ======================================== */
*, *::before, *::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
  -ms-text-size-adjust: 100%;
}

:root {
  /* Couleurs principales */
  --bg-gradient-start: #ffffff;
  --bg-gradient-end: #f5f5f4;
  --bg-card: #fafaf9;
  --bg: #ffffff;
  --bg-sidebar: #1c1917;
  --bg-sidebar-hover: #292524;
  
  /* Accents */
  --accent: #2563EB;
  --accent-secondary: #1e40af;
  --accent-tertiary: #3b82f6;
  --accent-glow: rgba(37, 99, 235, 0.15);
  --accent-red: #ef4444;
  --accent-red-soft: rgba(239, 68, 68, 0.08);
  --accent-green: #22c55e;
  --accent-green-soft: rgba(34, 197, 94, 0.1);
  --accent-orange: #f97316;
  --accent-orange-soft: rgba(249, 115, 22, 0.1);
  --accent-purple: #8b5cf6;
  --accent-purple-soft: rgba(139, 92, 246, 0.1);
  
  /* Texte */
  --text: #1c1917;
  --text-muted: #6B7280;
  --text-light: #9ca3af;
  --text-inverse: #ffffff;
  
  /* Bordures */
  --border: rgba(107, 114, 128, 0.25);
  --border-light: rgba(107, 114, 128, 0.15);
  
  /* Couleurs de marque */
  --brown: #8B7355;
  --brown-light: #a1887f;
  --gray: #6B7280;
  --blue: #2563EB;
  --blue-light: #3b82f6;
  
  /* Safe areas */
  --safe-area-inset-top: env(safe-area-inset-top, 0px);
  --safe-area-inset-bottom: env(safe-area-inset-bottom, 0px);
  --safe-area-inset-left: env(safe-area-inset-left, 0px);
  --safe-area-inset-right: env(safe-area-inset-right, 0px);
  
  /* Sidebar */
  --sidebar-width: 280px;
  --sidebar-collapsed-width: 80px;
  --header-height: 70px;
  
  /* Shadows */
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
  
  /* Transitions */
  --transition-fast: 0.15s ease;
  --transition-base: 0.3s ease;
  --transition-slow: 0.5s ease;
}

/* Dark Mode */
body.dark-mode {
  --bg-gradient-start: #0c0a09;
  --bg-gradient-end: #1c1917;
  --bg-card: #1c1917;
  --bg: #0c0a09;
  --bg-sidebar: #0c0a09;
  --bg-sidebar-hover: #1c1917;
  --text: #e7e5e4;
  --text-muted: #a8a29e;
  --text-light: #78716c;
  --border: rgba(168, 162, 158, 0.2);
  --border-light: rgba(168, 162, 158, 0.1);
  --accent: #3b82f6;
  --accent-secondary: #2563EB;
  --accent-glow: rgba(59, 130, 246, 0.2);
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
  background: linear-gradient(135deg, var(--bg-gradient-start) 0%, var(--bg-gradient-end) 100%);
  color: var(--text);
  overflow-x: hidden;
  transition: background 0.4s ease, color 0.4s ease;
  min-height: 100vh;
  line-height: 1.5;
}

/* Fix for iOS input zoom */
input, select, textarea {
  font-size: 16px;
}

/* Focus styles */
:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

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

/* ========================================
   TYPOGRAPHY
   ======================================== */
h1, h2, h3, h4, h5, h6 {
  font-weight: 700;
  line-height: 1.2;
  color: var(--text);
}

h1 { font-size: clamp(24px, 5vw, 36px); }
h2 { font-size: clamp(20px, 4vw, 28px); }
h3 { font-size: clamp(18px, 3.5vw, 22px); }
h4 { font-size: clamp(16px, 3vw, 18px); }

p {
  color: var(--text-muted);
  line-height: 1.6;
}

a {
  color: var(--accent);
  text-decoration: none;
  transition: color var(--transition-fast);
}

a:hover {
  color: var(--accent-secondary);
}

/* ========================================
   BUTTONS
   ======================================== */
.btn {
  padding: 12px 24px;
  border-radius: 12px;
  font-size: 14px;
  font-weight: 600;
  border: none;
  cursor: pointer;
  transition: all var(--transition-base);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  text-decoration: none;
  white-space: nowrap;
  -webkit-tap-highlight-color: transparent;
  touch-action: manipulation;
  min-height: 48px;
}

.btn-sm {
  padding: 8px 16px;
  font-size: 13px;
  min-height: 36px;
  border-radius: 8px;
}

.btn-lg {
  padding: 16px 32px;
  font-size: 16px;
  min-height: 56px;
  border-radius: 14px;
}

.btn-primary {
  background: linear-gradient(135deg, var(--accent), var(--accent-secondary));
  color: #ffffff;
  position: relative;
  overflow: hidden;
}

.btn-primary::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 0;
  height: 0;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.2);
  transform: translate(-50%, -50%);
  transition: width 0.6s, height 0.6s;
}

.btn-primary:hover::before {
  width: 280px;
  height: 280px;
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

.btn-secondary {
  background: var(--bg-card);
  color: var(--text);
  border: 1px solid var(--border);
}

.btn-secondary:hover {
  background: var(--bg);
  border-color: var(--accent);
  color: var(--accent);
}

.btn-ghost {
  background: transparent;
  color: var(--text-muted);
  border: none;
}

.btn-ghost:hover {
  background: var(--bg-card);
  color: var(--text);
}

.btn-danger {
  background: var(--accent-red);
  color: white;
}

.btn-danger:hover {
  background: #dc2626;
}

.btn-success {
  background: var(--accent-green);
  color: white;
}

.btn-success:hover {
  background: #16a34a;
}

.btn-block {
  width: 100%;
}

.btn:disabled {
  opacity: 0.6;
  cursor: not-allowed;
  transform: none !important;
}

.btn-loading .btn-text {
  visibility: hidden;
}

.btn-loading .btn-spinner {
  position: absolute;
  width: 20px;
  height: 20px;
  border: 2px solid rgba(255,255,255,0.3);
  border-top-color: white;
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

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

/* ========================================
   FORMS
   ======================================== */
.form-group {
  margin-bottom: 20px;
}

.form-label {
  display: block;
  font-size: 14px;
  font-weight: 500;
  color: var(--text);
  margin-bottom: 8px;
}

.form-label-optional {
  color: var(--text-muted);
  font-weight: 400;
}

.form-input,
.form-select,
.form-textarea {
  width: 100%;
  padding: 14px 16px;
  font-size: 15px;
  font-family: inherit;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 12px;
  color: var(--text);
  transition: all var(--transition-fast);
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-glow);
}

.form-input::placeholder {
  color: var(--text-light);
}

.form-input-icon {
  position: relative;
}

.form-input-icon .form-input {
  padding-left: 48px;
}

.form-input-icon .icon {
  position: absolute;
  left: 16px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-muted);
  font-size: 18px;
}

.form-input-icon .icon-right {
  left: auto;
  right: 16px;
  cursor: pointer;
}

.form-textarea {
  min-height: 120px;
  resize: vertical;
}

.form-select {
  appearance: none;
  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='%236B7280' 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 12px center;
  background-size: 20px;
  padding-right: 44px;
}

.form-checkbox-group {
  display: flex;
  align-items: center;
  gap: 10px;
}

.form-checkbox {
  width: 20px;
  height: 20px;
  accent-color: var(--accent);
  cursor: pointer;
}

.form-error {
  font-size: 13px;
  color: var(--accent-red);
  margin-top: 6px;
  display: flex;
  align-items: center;
  gap: 4px;
}

.form-hint {
  font-size: 13px;
  color: var(--text-muted);
  margin-top: 6px;
}

.form-divider {
  display: flex;
  align-items: center;
  gap: 16px;
  margin: 24px 0;
  color: var(--text-muted);
  font-size: 13px;
}

.form-divider::before,
.form-divider::after {
  content: '';
  flex: 1;
  height: 1px;
  background: var(--border);
}

/* ========================================
   CARDS
   ======================================== */
.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 24px;
  transition: all var(--transition-base);
}

.card-hover:hover {
  border-color: var(--accent);
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

.card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 20px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--border-light);
}

.card-title {
  font-size: 18px;
  font-weight: 600;
  color: var(--text);
}

.card-subtitle {
  font-size: 14px;
  color: var(--text-muted);
  margin-top: 4px;
}

.card-body {
  flex: 1;
}

.card-footer {
  margin-top: 20px;
  padding-top: 16px;
  border-top: 1px solid var(--border-light);
}

/* ========================================
   BADGES
   ======================================== */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 4px 10px;
  font-size: 12px;
  font-weight: 500;
  border-radius: 20px;
  white-space: nowrap;
}

.badge-primary {
  background: var(--accent-glow);
  color: var(--accent);
}

.badge-success {
  background: var(--accent-green-soft);
  color: var(--accent-green);
}

.badge-warning {
  background: var(--accent-orange-soft);
  color: var(--accent-orange);
}

.badge-danger {
  background: var(--accent-red-soft);
  color: var(--accent-red);
}

.badge-purple {
  background: var(--accent-purple-soft);
  color: var(--accent-purple);
}

.badge-gray {
  background: rgba(107, 114, 128, 0.1);
  color: var(--gray);
}

/* ========================================
   ALERTS
   ======================================== */
.alert {
  padding: 16px 20px;
  border-radius: 12px;
  display: flex;
  align-items: flex-start;
  gap: 12px;
  margin-bottom: 16px;
}

.alert-icon {
  font-size: 20px;
  flex-shrink: 0;
}

.alert-content {
  flex: 1;
}

.alert-title {
  font-weight: 600;
  margin-bottom: 4px;
}

.alert-message {
  font-size: 14px;
  opacity: 0.9;
}

.alert-info {
  background: var(--accent-glow);
  color: var(--accent);
  border: 1px solid rgba(37, 99, 235, 0.2);
}

.alert-success {
  background: var(--accent-green-soft);
  color: #166534;
  border: 1px solid rgba(34, 197, 94, 0.2);
}

.alert-warning {
  background: var(--accent-orange-soft);
  color: #9a3412;
  border: 1px solid rgba(249, 115, 22, 0.2);
}

.alert-error {
  background: var(--accent-red-soft);
  color: #991b1b;
  border: 1px solid rgba(239, 68, 68, 0.2);
}

/* ========================================
   TABLES
   ======================================== */
.table-container {
  overflow-x: auto;
  border-radius: 12px;
  border: 1px solid var(--border);
}

.table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
}

.table th,
.table td {
  padding: 14px 16px;
  text-align: left;
  border-bottom: 1px solid var(--border-light);
}

.table th {
  background: var(--bg-card);
  font-weight: 600;
  color: var(--text);
  white-space: nowrap;
}

.table tbody tr {
  transition: background var(--transition-fast);
}

.table tbody tr:hover {
  background: var(--bg-card);
}

.table tbody tr:last-child td {
  border-bottom: none;
}

/* ========================================
   STATS CARDS
   ======================================== */
.stat-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 24px;
  position: relative;
  overflow: hidden;
}

.stat-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--brown), var(--accent));
}

.stat-icon {
  width: 48px;
  height: 48px;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 24px;
  margin-bottom: 16px;
}

.stat-icon-blue {
  background: var(--accent-glow);
  color: var(--accent);
}

.stat-icon-green {
  background: var(--accent-green-soft);
  color: var(--accent-green);
}

.stat-icon-orange {
  background: var(--accent-orange-soft);
  color: var(--accent-orange);
}

.stat-icon-purple {
  background: var(--accent-purple-soft);
  color: var(--accent-purple);
}

.stat-value {
  font-size: 32px;
  font-weight: 700;
  color: var(--text);
  line-height: 1;
  margin-bottom: 4px;
}

.stat-label {
  font-size: 14px;
  color: var(--text-muted);
}

.stat-trend {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-size: 13px;
  font-weight: 500;
  margin-top: 8px;
}

.stat-trend-up {
  color: var(--accent-green);
}

.stat-trend-down {
  color: var(--accent-red);
}

/* ========================================
   EMPTY STATES
   ======================================== */
.empty-state {
  text-align: center;
  padding: 60px 20px;
}

.empty-state-icon {
  width: 80px;
  height: 80px;
  border-radius: 50%;
  background: var(--bg-card);
  border: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 32px;
  color: var(--text-muted);
  margin: 0 auto 20px;
}

.empty-state-title {
  font-size: 18px;
  font-weight: 600;
  margin-bottom: 8px;
}

.empty-state-text {
  color: var(--text-muted);
  margin-bottom: 24px;
  max-width: 400px;
  margin-left: auto;
  margin-right: auto;
}

/* ========================================
   LOADING STATES
   ======================================== */
.skeleton {
  background: linear-gradient(90deg, var(--bg-card) 25%, var(--border-light) 50%, var(--bg-card) 75%);
  background-size: 200% 100%;
  animation: skeleton-loading 1.5s ease-in-out infinite;
  border-radius: 8px;
}

@keyframes skeleton-loading {
  0% { background-position: 200% 0; }
  100% { background-position: -200% 0; }
}

.skeleton-text {
  height: 16px;
  margin-bottom: 8px;
}

.skeleton-title {
  height: 24px;
  width: 60%;
  margin-bottom: 12px;
}

.skeleton-avatar {
  width: 48px;
  height: 48px;
  border-radius: 50%;
}

.skeleton-card {
  height: 120px;
}

/* ========================================
   TOOLTIPS
   ======================================== */
.tooltip {
  position: relative;
}

.tooltip::after {
  content: attr(data-tooltip);
  position: absolute;
  bottom: 100%;
  left: 50%;
  transform: translateX(-50%) translateY(-8px);
  padding: 8px 12px;
  background: var(--bg-sidebar);
  color: var(--text-inverse);
  font-size: 12px;
  border-radius: 8px;
  white-space: nowrap;
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-fast);
  pointer-events: none;
  z-index: 100;
}

.tooltip:hover::after {
  opacity: 1;
  visibility: visible;
  transform: translateX(-50%) translateY(-4px);
}

/* ========================================
   UTILITIES
   ======================================== */
.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.text-primary { color: var(--accent); }
.text-success { color: var(--accent-green); }
.text-warning { color: var(--accent-orange); }
.text-danger { color: var(--accent-red); }
.text-muted { color: var(--text-muted); }

.font-medium { font-weight: 500; }
.font-semibold { font-weight: 600; }
.font-bold { font-weight: 700; }

.d-none { display: none !important; }
.d-block { display: block; }
.d-flex { display: flex; }
.d-grid { display: grid; }

.flex-column { flex-direction: column; }
.flex-wrap { flex-wrap: wrap; }
.align-center { align-items: center; }
.justify-center { justify-content: center; }
.justify-between { justify-content: space-between; }
.gap-1 { gap: 4px; }
.gap-2 { gap: 8px; }
.gap-3 { gap: 12px; }
.gap-4 { gap: 16px; }
.gap-5 { gap: 24px; }

.mt-1 { margin-top: 4px; }
.mt-2 { margin-top: 8px; }
.mt-3 { margin-top: 12px; }
.mt-4 { margin-top: 16px; }
.mt-5 { margin-top: 24px; }

.mb-1 { margin-bottom: 4px; }
.mb-2 { margin-bottom: 8px; }
.mb-3 { margin-bottom: 12px; }
.mb-4 { margin-bottom: 16px; }
.mb-5 { margin-bottom: 24px; }

.w-full { width: 100%; }
.h-full { height: 100%; }

.rounded { border-radius: 8px; }
.rounded-lg { border-radius: 12px; }
.rounded-xl { border-radius: 16px; }
.rounded-full { border-radius: 9999px; }

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

.cursor-pointer { cursor: pointer; }
.overflow-hidden { overflow: hidden; }
.truncate {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

/* Grid layouts */
.grid-2 {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}

.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.grid-4 {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

@media (max-width: 1200px) {
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 900px) {
  .grid-3 { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 600px) {
  .grid-2,
  .grid-3,
  .grid-4 { grid-template-columns: 1fr; }
}

/* ========================================
   ANIMATIONS
   ======================================== */
.fade-in {
  animation: fadeIn 0.4s ease-out;
}

@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

.slide-up {
  animation: slideUp 0.4s ease-out;
}

@keyframes slideUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.scale-in {
  animation: scaleIn 0.3s ease-out;
}

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

/* Staggered animations */
.stagger-1 { animation-delay: 0.1s; }
.stagger-2 { animation-delay: 0.2s; }
.stagger-3 { animation-delay: 0.3s; }
.stagger-4 { animation-delay: 0.4s; }
.stagger-5 { animation-delay: 0.5s; }