/* ========================================
   GLOBAL STYLES - Architecture modulaire
   ======================================== */

/* Reset et Box Model */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

/* Variables CSS pour une personnalisation facile */
:root {
  --color-primary: #1e3a5f;
  --color-primary-dark: #162d4a;
  --color-primary-light: #2c5282;
  --color-secondary: #3498db;
  --color-success: #27ae60;
  --color-danger: #e74c3c;
  --color-warning: #f39c12;
  --color-info: #3498db;
  
  --color-text: #2d3748;
  --color-text-light: #718096;
  --color-text-dark: #1a202c;
  
  --color-bg-primary: #ffffff;
  --color-bg-secondary: #f7fafc;
  --color-bg-tertiary: #edf2f7;
  
  --color-border: #e2e8f0;
  --color-border-light: #edf2f7;
  --color-border-dark: #cbd5e0;
  
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.08);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.12);
  
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  
  --transition-fast: 0.15s ease-in-out;
  --transition-normal: 0.25s ease-in-out;
  --transition-slow: 0.35s ease-in-out;
  
  --font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  --font-family-mono: 'Courier New', Courier, monospace;
  
  --spacing-xs: 0.25rem;
  --spacing-sm: 0.5rem;
  --spacing-md: 1rem;
  --spacing-lg: 1.5rem;
  --spacing-xl: 2rem;
  --spacing-2xl: 3rem;
}

/* Body et Layout de base */
body {
  margin: 0;
  font-family: var(--font-family);
  background: linear-gradient(135deg, #f5f7fa 0%, #e8ecf1 100%);
  color: var(--color-text);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  line-height: 1.6;
}

/* Conteneurs */
.container {
  width: 100%;
  margin: 0 auto;
  padding: 0 var(--spacing-lg);
}

.container-fluid {
  width: 100%;
  margin: 0;
  padding: 0 clamp(1rem, 3vw, 2.5rem);
}

/* Header */
header {
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-light) 100%);
  color: #ffffff;
  padding: var(--spacing-lg) 0;
  box-shadow: var(--shadow-md);
  position: sticky;
  top: 0;
  z-index: 1000;
}

.header-content {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--spacing-lg);
}

.brand {
  font-size: 1.5rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  text-decoration: none;
  color: #ffffff;
}

.nav-links {
  display: flex;
  gap: var(--spacing-md);
  align-items: center;
  font-size: 0.975rem;
}

.nav-links a {
  color: #ffffff;
  text-decoration: none;
  font-weight: 600;
  transition: all var(--transition-fast);
  padding: 0.5rem 1rem;
  border-radius: 999px;
  position: relative;
  white-space: nowrap;
}

.nav-links a:hover,
.nav-links a:focus {
  background-color: rgba(255, 255, 255, 0.15);
  text-decoration: none;
  transform: translateY(-1px);
}

.nav-links a:active {
  transform: translateY(0);
}

/* Dropdowns dans la barre de navigation */
.nav-group {
  position: relative;
  display: inline-flex;
  align-items: center;
}

.nav-group-label {
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  color: #ffffff;
  font-weight: 600;
  padding: 0.5rem 1rem;
  border-radius: 999px;
}

.nav-group-menu {
  position: absolute;
  top: calc(100% + 0.5rem);
  right: 0;
  background-color: #ffffff;
  color: var(--color-text);
  min-width: 200px;
  border-radius: var(--radius-md);
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.15);
  padding: 0.75rem 0;
  opacity: 0;
  visibility: hidden;
  transform: translateY(-12px) scaleY(0.95);
  transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  z-index: 1200;
  pointer-events: none;
  border: 1px solid var(--color-border);
  max-height: 400px;
  overflow-y: auto;
}

.nav-group-menu.active {
  opacity: 1;
  visibility: visible;
  transform: translateY(0) scaleY(1);
  pointer-events: auto;
}

.nav-group-menu a,
.nav-group-menu button {
  display: block;
  width: 100%;
  text-align: left;
  padding: 0.75rem 1rem;
  color: var(--color-text);
  background: transparent;
  border: none;
  text-decoration: none;
  font-weight: 500;
  font-size: 0.9rem;
  transition: all 0.15s ease;
  cursor: pointer;
}

.nav-group-menu a:hover,
.nav-group-menu button:hover {
  background-color: var(--color-bg-tertiary);
  color: var(--color-primary);
  padding-left: 1.25rem;
}

.nav-group::before {
  content: '';
  position: absolute;
  top: calc(100% - 0.25rem);
  right: 0;
  left: 0;
  height: 0.75rem;
  pointer-events: auto;
  z-index: 1150;
}

.nav-group-label {
  transition: all var(--transition-fast);
  cursor: pointer;
}

.nav-group.open .nav-group-label,
.nav-group:hover .nav-group-label,
.nav-group:focus-within .nav-group-label {
  background-color: rgba(255, 255, 255, 0.2);
  box-shadow: inset 0 2px 6px rgba(0, 0, 0, 0.1);
}

/* Avatar profil rond */
.nav-avatar {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background-color: rgba(255, 255, 255, 0.25);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  text-transform: uppercase;
  margin-left: 0.5rem;
  box-shadow: var(--shadow-sm);
}

/* Main */
main {
  flex: 1;
  padding: var(--spacing-xl) 0;
}

/* Typographie */
h1, h2, h3, h4, h5, h6 {
  margin: 0;
  color: var(--color-text-dark);
  font-weight: 700;
  letter-spacing: -0.025em;
  line-height: 1.2;
}

h1 {
  font-size: 2rem;
}

h2 {
  font-size: 1.75rem;
}

h3 {
  font-size: 1.5rem;
}

h4 {
  font-size: 1.25rem;
}

p {
  margin: 0 0 var(--spacing-md);
}

/* Footer */
footer {
  background-color: var(--color-bg-tertiary);
  color: var(--color-text-light);
  padding: var(--spacing-lg) 0;
  font-size: 0.875rem;
  text-align: center;
  margin-top: auto;
  border-top: 1px solid var(--color-border);
}

/* Breadcrumb (Fil d'Ariane) */
.breadcrumb-nav {
  margin-bottom: var(--spacing-lg);
  margin-top: var(--spacing-md);
}

.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  padding: 0.75rem 1rem;
  margin-bottom: 0;
  list-style: none;
  background-color: var(--color-bg-secondary);
  border-radius: var(--radius-md);
  font-size: 0.9rem;
  box-shadow: var(--shadow-sm);
}

.breadcrumb-item {
  display: flex;
  align-items: center;
}

.breadcrumb-item + .breadcrumb-item::before {
  content: "/";
  padding: 0 0.5rem;
  color: var(--color-text-light);
}

.breadcrumb-item a {
  color: var(--color-primary);
  text-decoration: none;
  transition: color var(--transition-fast);
}

.breadcrumb-item a:hover {
  color: var(--color-primary-light);
  text-decoration: underline;
}

.breadcrumb-item.active {
  color: var(--color-text-light);
}

/* Flash Messages */
.flash-container {
  margin-bottom: var(--spacing-lg);
}

.flash {
  padding: var(--spacing-md) var(--spacing-lg);
  border-radius: var(--radius-md);
  margin-bottom: var(--spacing-md);
  border: 1px solid transparent;
  font-size: 0.95rem;
  font-weight: 500;
  box-shadow: var(--shadow-sm);
  animation: slideDown 0.3s ease-out;
}

@keyframes slideDown {
  from {
    opacity: 0;
    transform: translateY(-10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.flash.success {
  background: linear-gradient(135deg, #e6f4ea 0%, #d4ede0 100%);
  border-color: var(--color-success);
  color: #22543d;
}

.flash.error {
  background: linear-gradient(135deg, #fdecea 0%, #fbd5d0 100%);
  border-color: var(--color-danger);
  color: #742a2a;
}

.flash.info {
  background: linear-gradient(135deg, #e6f2ff 0%, #d0e5ff 100%);
  border-color: var(--color-info);
  color: #1a4d80;
}

.flash.warning {
  background: linear-gradient(135deg, #fff4e6 0%, #ffe8cc 100%);
  border-color: var(--color-warning);
  color: #7d4e00;
}

/* Utilitaires */
.text-center {
  text-align: center;
}

.text-left {
  text-align: left;
}

.text-right {
  text-align: right;
}

.mt-0 { margin-top: 0; }
.mt-1 { margin-top: var(--spacing-sm); }
.mt-2 { margin-top: var(--spacing-md); }
.mt-3 { margin-top: var(--spacing-lg); }
.mt-4 { margin-top: var(--spacing-xl); }

.mb-0 { margin-bottom: 0; }
.mb-1 { margin-bottom: var(--spacing-sm); }
.mb-2 { margin-bottom: var(--spacing-md); }
.mb-3 { margin-bottom: var(--spacing-lg); }
.mb-4 { margin-bottom: var(--spacing-xl); }

.p-0 { padding: 0; }
.p-1 { padding: var(--spacing-sm); }
.p-2 { padding: var(--spacing-md); }
.p-3 { padding: var(--spacing-lg); }
.p-4 { padding: var(--spacing-xl); }

/* Media Queries */
@media (max-width: 992px) {
  :root {
    --spacing-xl: 1.5rem;
    --spacing-2xl: 2rem;
  }
}

@media (max-width: 768px) {
  header {
    padding: var(--spacing-md) 0;
  }

  .header-content {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--spacing-md);
  }

  .nav-links {
    width: 100%;
    flex-wrap: wrap;
  }

  main {
    padding: var(--spacing-lg) 0;
  }

  h1 {
    font-size: 1.75rem;
  }

  h2 {
    font-size: 1.5rem;
  }
}

@media (max-width: 480px) {
  .container,
  .container-fluid {
    padding: 0 var(--spacing-md);
  }

  h1 {
    font-size: 1.5rem;
  }

  h2 {
    font-size: 1.25rem;
  }
}