/**
 * SOMNIZEN - Design System Global
 * Phase 7 : Fichier CSS unifié pour tout le site
 */

/* =====================================================
   VARIABLES CSS - MODE CLAIR (par défaut)
   ===================================================== */
:root {
  /* Palette identité de marque */
  --color-primary: #1B3B4F;
  --color-primary-dark: #142d3d;
  --color-secondary: #D4AF37;
  --color-secondary-dark: #b8962f;
  
  /* Backgrounds */
  --bg-primary: #F5F0E9;
  --bg-card: #FFFFFF;
  --bg-dark: #1B3B4F;
  --bg-hover: rgba(27,59,79,0.05);
  
  /* Textes */
  --text-primary: #2D3E4F;
  --text-secondary: #6B7A88;
  --text-light: #F5F0E9;
  --text-muted: #9CA3AF;
  --text-inverse: #FFFFFF;
  
  /* Bordures */
  --border-color: #E5E5E5;
  --border-light: #F0F0F0;
  
  /* Transitions */
  --transition-theme: background-color 0.3s ease, color 0.3s ease, border-color 0.3s ease;
}

/* =====================================================
   VARIABLES CSS - MODE SOMBRE
   ===================================================== */
[data-theme="dark"] {
  /* Backgrounds */
  --bg-primary: #0F1419;
  --bg-card: #1A1F2E;
  --bg-dark: #0A0E14;
  --bg-hover: rgba(212,175,55,0.1);
  
  /* Textes */
  --text-primary: #E8E8E8;
  --text-secondary: #A0A8B0;
  --text-light: #F5F0E9;
  --text-muted: #6B7280;
  --text-inverse: #1B3B4F;
  
  /* Bordures */
  --border-color: #2D3748;
  --border-light: #1F2937;
  
  /* États ajustés */
  --color-success: #2D5A3D;
  --color-error: #5A2D2D;
  --color-warning: #5A4A2D;
  --color-info: #2D4A5A;
}

/* =====================================================
   THEME TOGGLE BUTTON
   ===================================================== */
.theme-toggle {
  background: var(--bg-card);
  border: 2px solid var(--border-color);
  border-radius: var(--radius-full);
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  font-size: 20px;
  transition: all 0.3s ease;
  margin-left: 15px;
  position: relative;
  overflow: hidden;
}

.theme-toggle:hover {
  transform: scale(1.1);
  border-color: var(--color-secondary);
}

.theme-icon-light,
.theme-icon-dark {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  transition: opacity 0.3s ease;
  font-size: 20px;
  line-height: 1;
}

/* Mode clair : soleil visible, lune cachée */
.theme-icon-light {
  opacity: 1;
}

.theme-icon-dark {
  opacity: 0;
}

/* Mode sombre : lune visible, soleil cachée */
[data-theme="dark"] .theme-icon-light {
  opacity: 0;
}

[data-theme="dark"] .theme-icon-dark {
  opacity: 1;
}

/* Variables supplémentaires */
:root {
  /* États */
  --color-success: #A7C4B5;
  --color-error: #E8B4B4;
  --color-warning: #F5D0A9;
  --color-info: #B8D4E3;
  
  /* Badges */
  --badge-gratuit: #6B7A88;
  --badge-premium: #D4AF37;
  --badge-lifetime: #1B3B4F;
  
  /* Rayons */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 20px;
  --radius-full: 9999px;
  
  /* Ombres */
  --shadow-sm: 0 1px 2px rgba(0,0,0,0.05);
  --shadow-md: 0 4px 6px rgba(0,0,0,0.05);
  --shadow-lg: 0 10px 15px rgba(0,0,0,0.08);
  --shadow-xl: 0 20px 25px rgba(0,0,0,0.1);
  
  /* Transitions */
  --transition-fast: 0.15s ease;
  --transition-normal: 0.2s ease;
  --transition-slow: 0.3s ease;
  
  /* Typographie */
  --font-title: 'DM Serif Display', Georgia, serif;
  --font-body: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-accent: 'Nunito Sans', sans-serif;
  
  /* Espacements */
  --space-xs: 4px;
  --space-sm: 8px;
  --space-md: 16px;
  --space-lg: 24px;
  --space-xl: 32px;
  --space-2xl: 48px;
  --space-3xl: 64px;
}

/* =====================================================
   RESET & BASE
   ===================================================== */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.6;
  color: var(--text-primary);
  background: var(--bg-primary);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

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

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

/* =====================================================
   TYPOGRAPHIE
   ===================================================== */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-title);
  font-weight: 400;
  line-height: 1.2;
  color: var(--color-primary);
}

h1 { font-size: 2.5rem; }
h2 { font-size: 2rem; }
h3 { font-size: 1.5rem; }
h4 { font-size: 1.25rem; }

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

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

.font-title { font-family: var(--font-title); }
.font-body { font-family: var(--font-body); }
.font-accent { font-family: var(--font-accent); }

/* =====================================================
   CONTENEURS
   ===================================================== */
.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--space-lg);
}

.container-narrow {
  max-width: 800px;
}

.container-wide {
  max-width: 1400px;
}

/* =====================================================
   HEADER GLOBAL
   ===================================================== */
.sz-header {
  background: var(--bg-card);
  border-bottom: 1px solid rgba(27,59,79,0.1);
  padding: var(--space-md) 0;
  position: sticky;
  top: 0;
  z-index: 100;
}

.sz-header-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--space-lg);
}

.sz-logo {
  display: flex;
  align-items: center;
}

.sz-logo img {
  height: 40px;
  width: auto;
}

.sz-nav {
  display: flex;
  gap: var(--space-xl);
  align-items: center;
}

.sz-nav a {
  font-size: 15px;
  font-weight: 500;
  color: var(--text-primary);
  position: relative;
}

.sz-nav a::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--color-secondary);
  transition: var(--transition-normal);
}

.sz-nav a:hover::after,
.sz-nav a.active::after {
  width: 100%;
}

.sz-nav a:hover {
  color: var(--color-secondary);
}

/* Menu mobile */
.sz-menu-toggle {
  display: none;
  background: none;
  border: none;
  font-size: 24px;
  cursor: pointer;
  color: var(--color-primary);
}

@media (max-width: 768px) {
  .sz-menu-toggle {
    display: block;
  }
  
  .sz-nav {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--bg-card);
    flex-direction: column;
    padding: var(--space-lg);
    gap: var(--space-md);
    border-bottom: 1px solid rgba(27,59,79,0.1);
    box-shadow: var(--shadow-lg);
  }
  
  .sz-nav.is-open {
    display: flex;
  }
}

/* =====================================================
   FOOTER GLOBAL
   ===================================================== */
.sz-footer {
  background: var(--color-primary);
  color: var(--text-light);
  padding: var(--space-3xl) 0 var(--space-xl);
  margin-top: var(--space-3xl);
}

.sz-footer-content {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--space-lg);
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-xl);
}

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

@media (max-width: 500px) {
  .sz-footer-content {
    grid-template-columns: 1fr;
  }
}

.sz-footer h4 {
  color: var(--color-secondary);
  font-family: var(--font-accent);
  font-size: 14px;
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-bottom: var(--space-md);
}

.sz-footer ul {
  list-style: none;
}

.sz-footer li {
  margin-bottom: var(--space-sm);
}

.sz-footer a {
  color: rgba(255,255,255,0.7);
  font-size: 14px;
}

.sz-footer a:hover {
  color: var(--color-secondary);
}

.sz-footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.1);
  margin-top: var(--space-xl);
  padding-top: var(--space-lg);
  text-align: center;
  font-size: 14px;
  color: rgba(255,255,255,0.5);
}

/* =====================================================
   BOUTONS
   ===================================================== */
.sz-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  padding: 12px 24px;
  border-radius: var(--radius-md);
  font-family: var(--font-accent);
  font-weight: 600;
  font-size: 15px;
  text-decoration: none;
  cursor: pointer;
  border: none;
  transition: var(--transition-normal);
}

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

.sz-btn-primary {
  background: var(--color-secondary);
  color: white;
}

.sz-btn-primary:hover {
  background: var(--color-secondary-dark);
  color: white;
}

.sz-btn-secondary {
  background: transparent;
  border: 2px solid var(--color-primary);
  color: var(--color-primary);
}

.sz-btn-secondary:hover {
  background: var(--color-primary);
  color: white;
}

.sz-btn-light {
  background: white;
  color: var(--color-primary);
}

.sz-btn-light:hover {
  background: var(--bg-primary);
}

.sz-btn-block {
  width: 100%;
}

.sz-btn-sm {
  padding: 8px 16px;
  font-size: 13px;
}

.sz-btn-lg {
  padding: 16px 32px;
  font-size: 17px;
}

/* =====================================================
   CARTES
   ===================================================== */
.sz-card {
  background: var(--bg-card);
  border-radius: var(--radius-md);
  padding: var(--space-xl);
  box-shadow: var(--shadow-md);
  transition: var(--transition-normal);
}

.sz-card:hover {
  box-shadow: var(--shadow-lg);
}

.sz-card-title {
  font-family: var(--font-title);
  font-size: 1.25rem;
  margin-bottom: var(--space-md);
}

/* =====================================================
   FORMULAIRES
   ===================================================== */
.sz-input,
.sz-select,
.sz-textarea {
  width: 100%;
  padding: 12px 16px;
  border: 1px solid rgba(27,59,79,0.2);
  border-radius: var(--radius-md);
  font-family: var(--font-body);
  font-size: 15px;
  background: white;
  transition: var(--transition-fast);
}

.sz-input:focus,
.sz-select:focus,
.sz-textarea:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(27,59,79,0.1);
}

.sz-label {
  display: block;
  margin-bottom: 6px;
  font-size: 14px;
  font-weight: 500;
}

.sz-form-group {
  margin-bottom: var(--space-lg);
}

/* =====================================================
   BADGES
   ===================================================== */
.sz-badge {
  display: inline-block;
  padding: 4px 12px;
  border-radius: var(--radius-full);
  font-family: var(--font-accent);
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.sz-badge-gratuit {
  background: var(--badge-gratuit);
  color: white;
}

.sz-badge-premium {
  background: var(--badge-premium);
  color: white;
}

.sz-badge-lifetime {
  background: var(--badge-lifetime);
  color: white;
}

/* =====================================================
   ALERTES
   ===================================================== */
.sz-alert {
  padding: 16px;
  border-radius: var(--radius-md);
  margin-bottom: var(--space-lg);
}

.sz-alert-success {
  background: var(--color-success);
  color: var(--text-primary);
}

.sz-alert-error {
  background: var(--color-error);
  color: var(--text-primary);
}

.sz-alert-warning {
  background: var(--color-warning);
  color: var(--text-primary);
}

/* =====================================================
   UTILITAIRES
   ===================================================== */
.hidden { display: none !important; }
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0,0,0,0);
  border: 0;
}

.mt-1 { margin-top: var(--space-xs); }
.mt-2 { margin-top: var(--space-sm); }
.mt-3 { margin-top: var(--space-md); }
.mt-4 { margin-top: var(--space-lg); }
.mt-5 { margin-top: var(--space-xl); }

.mb-1 { margin-bottom: var(--space-xs); }
.mb-2 { margin-bottom: var(--space-sm); }
.mb-3 { margin-bottom: var(--space-md); }
.mb-4 { margin-bottom: var(--space-lg); }
.mb-5 { margin-bottom: var(--space-xl); }

/* =====================================================
   ANIMATIONS
   ===================================================== */
@keyframes fadeIn {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}

.sz-fade-in {
  animation: fadeIn 0.5s ease;
}

/* =====================================================
   PAGE 404
   ===================================================== */
.sz-error-page {
  min-height: 80vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: var(--space-xl);
}

.sz-error-code {
  font-family: var(--font-title);
  font-size: 120px;
  color: var(--color-secondary);
  line-height: 1;
  margin-bottom: var(--space-md);
}

.sz-error-title {
  font-size: 28px;
  margin-bottom: var(--space-md);
}

.sz-error-text {
  color: var(--text-secondary);
  margin-bottom: var(--space-xl);
  max-width: 400px;
}

/* =====================================================
   RESPONSIVE
   ===================================================== */
@media (max-width: 768px) {
  html { font-size: 15px; }
  
  h1 { font-size: 2rem; }
  h2 { font-size: 1.75rem; }
  h3 { font-size: 1.25rem; }
  
  .sz-card {
    padding: var(--space-lg);
  }
}

@media (max-width: 480px) {
  html { font-size: 14px; }
  
  .container {
    padding: 0 var(--space-md);
  }
  
  .sz-error-code {
    font-size: 80px;
  }
}