/**
 * Les Petits Liens - Styles principaux
 * Design DYS-friendly : Lexend Deca, espaces aérés, contraste WCAG AA
 * © 2025 Angélique Mejias - Les Petits Liens
 */

/* ===== IMPORT FONTS ===== */
@import url('https://fonts.googleapis.com/css2?family=Lexend+Deca:wght@300;400;500;600;700&display=swap');

/* ===== VARIABLES CSS ===== */
:root {
  /* Couleurs principales */
  --color-primary: #2C3E50;      /* Anthracite */
  --color-secondary: #95B8A8;    /* Vert doux (couleur d'accent) */
  --color-accent: #D4A574;       /* Beige doré (alternative) */
  --color-white: #FFFFFF;
  --color-black: #000000;
  --color-text: #2C3E50;
  --color-text-light: #6B7280;
  --color-bg: #FFFFFF;
  --color-bg-light: #F9FAFB;

  /* Typographie */
  --font-family: 'Lexend Deca', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-size-base: 16px;
  --font-size-small: 14px;
  --font-size-large: 18px;
  --font-size-h1: 42px;
  --font-size-h2: 32px;
  --font-size-h3: 24px;
  --font-size-h4: 20px;

  /* Espacements (généreux pour accessibilité) */
  --spacing-xs: 8px;
  --spacing-sm: 16px;
  --spacing-md: 24px;
  --spacing-lg: 40px;
  --spacing-xl: 64px;
  --spacing-xxl: 96px;

  /* Interligne (minimum 1.6 pour DYS) */
  --line-height-base: 1.7;
  --line-height-heading: 1.3;

  /* Bordures */
  --border-radius: 8px;
  --border-width: 1px;

  /* Transitions */
  --transition: all 0.3s ease;

  /* Largeurs */
  --container-max: 1200px;
  --content-max: 800px;
}

/* ===== DARK MODE VARIABLES (WCAG AAA) ===== */
[data-theme="dark"] {
  /* Couleurs principales dark mode */
  --color-primary: #A8C9BC;          /* Vert doux lumineux (bon contraste sur fond sombre) */
  --color-secondary: #A8C9BC;        /* Vert doux (même que primary pour cohérence) */
  --color-accent: #E0B88A;           /* Beige doré lumineux */
  --color-white: #0F1419;            /* Inversé : devient fond sombre */
  --color-black: #FFFFFF;            /* Inversé : devient texte clair */
  --color-text: #E8EAED;             /* Texte très clair (contraste ~13:1 = AAA) */
  --color-text-light: #A8B3BF;       /* Texte secondaire (contraste ~7:1 = AAA) */
  --color-bg: #0F1419;               /* Fond très sombre */
  --color-bg-light: #1C252E;         /* Fond légèrement plus clair pour cartes/sections */

  /* Ajustements pour liens et boutons en dark mode */
  --link-color: #A8C9BC;
  --link-hover-color: #C1DDD1;
  --button-bg: #A8C9BC;
  --button-text: #0F1419;
  --button-hover-bg: #C1DDD1;
}

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

html {
  font-size: var(--font-size-base);
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-family);
  font-size: var(--font-size-base);
  line-height: var(--line-height-base);
  color: var(--color-text);
  background-color: var(--color-bg);
  letter-spacing: 0.01em; /* Légère augmentation pour lisibilité DYS */
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* ===== TYPOGRAPHIE ===== */
h1, h2, h3, h4, h5, h6 {
  font-weight: 600;
  line-height: var(--line-height-heading);
  margin-bottom: var(--spacing-md);
  letter-spacing: 0.02em;
  color: var(--color-primary);
}

h1 {
  font-size: var(--font-size-h1);
  font-weight: 700;
}

h2 {
  font-size: var(--font-size-h2);
}

h3 {
  font-size: var(--font-size-h3);
}

h4 {
  font-size: var(--font-size-h4);
}

p {
  margin-bottom: var(--spacing-md);
  max-width: 70ch; /* Limite largeur ligne pour lisibilité */
}

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

a:hover {
  color: var(--color-primary);
  text-decoration: underline;
}

a:focus {
  outline: 2px solid var(--color-secondary);
  outline-offset: 2px;
}

strong {
  font-weight: 600;
}

em {
  font-style: italic;
}

/* ===== LAYOUT ===== */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--spacing-md);
}

.content-narrow {
  max-width: var(--content-max);
  margin: 0 auto;
}

.section {
  padding: var(--spacing-xl) 0;
}

.section-lg {
  padding: var(--spacing-xxl) 0;
}

/* ===== HEADER & NAVIGATION ===== */
.header {
  background-color: var(--color-white);
  border-bottom: 1px solid #E5E7EB;
  position: sticky;
  top: 0;
  z-index: 1000;
  box-shadow: 0 1px 3px rgba(0,0,0,0.05);
  width: 100%;
}

[data-theme="dark"] .header {
  background-color: var(--color-bg);
  border-bottom: 1px solid #374151;
}

.header-container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--spacing-md) var(--spacing-lg);
  position: relative;
}

/* Navigation centrée (desktop) */
.nav-center {
  flex: 1;
  display: flex;
  justify-content: center;
}

/* Utilities à droite (langue + thème) */
.nav-utilities {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  margin-left: auto;
}

/* Desktop - Layout 3 colonnes (Logo gauche | Nav centre | Utils droite) */
@media (min-width: 1025px) {
  .header-container {
    padding: var(--spacing-md) var(--spacing-xl);
    display: flex;
    justify-content: space-between;
    align-items: center;
  }

  .nav-center {
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
  }
}

/* Drapeau langue en mode burger (affiché à droite du logo) */
.header-lang-mobile {
  display: none;
}

@media (max-width: 1024px) {
  .header-lang-mobile {
    display: flex;
    align-items: center;
    gap: 8px;
    position: absolute;
    right: 60px;
    top: 50%;
    transform: translateY(-50%);
  }

  .header-lang-mobile .flag-icon-round {
    width: 24px;
    height: 24px;
  }
}

.logo {
  font-size: 24px;
  font-weight: 700;
  color: var(--color-primary);
  text-decoration: none;
  display: flex;
  align-items: center;
}

.logo img {
  height: 40px;
  width: auto;
  object-fit: contain;
}

/* Logo SVG - Changement de couleur selon thème */
.logo img {
  transition: filter 0.3s ease;
}

/* Dark mode - Logo blanc via filter */
[data-theme="dark"] .logo img {
  filter: brightness(0) invert(1);
}

.logo:hover {
  text-decoration: none;
  color: var(--color-secondary);
}

.logo:hover img {
  opacity: 0.8;
}

.nav {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
}

.nav-list {
  display: flex;
  list-style: none;
  gap: var(--spacing-md);
  align-items: center;
}

.nav-link {
  color: var(--color-text);
  font-weight: 500;
  padding: var(--spacing-xs) var(--spacing-sm);
  border-radius: var(--border-radius);
  transition: var(--transition);
}

.nav-link:hover {
  background-color: var(--color-bg-light);
  color: var(--color-secondary);
  text-decoration: none;
}

.nav-link.active {
  color: var(--color-secondary);
}

/* Language Switcher Dropdown */
.lang-switcher-dropdown {
  position: relative;
  margin-left: var(--spacing-sm);
  padding-left: var(--spacing-sm);
  border-left: 1px solid #E5E7EB;
}

.lang-current {
  display: flex;
  align-items: center;
  gap: 6px;
  background: var(--color-bg-light);
  border: 1px solid #E5E7EB;
  border-radius: 6px;
  padding: 6px 12px;
  cursor: pointer;
  font-family: var(--font-family);
  font-size: var(--font-size-small);
  font-weight: 500;
  color: var(--color-text);
  transition: var(--transition);
}

.lang-current:hover {
  background: var(--color-white);
  border-color: var(--color-secondary);
}

.lang-current .flag-icon-round,
.lang-option .flag-icon-round {
  width: 20px;
  height: 20px;
  border-radius: 50%;
  overflow: hidden;
  display: inline-block;
  flex-shrink: 0;
  object-fit: cover;
}

.lang-current .lang-code {
  font-weight: 600;
  display: none; /* Cacher le code langue, garder juste drapeau + flèche */
}

.lang-current .dropdown-arrow {
  font-size: 10px;
  transition: transform 0.2s;
}

.lang-current[aria-expanded="true"] .dropdown-arrow {
  transform: rotate(180deg);
}

.lang-dropdown-menu {
  position: absolute;
  top: calc(100% + 8px);
  right: 0;
  background: var(--color-white);
  border: 1px solid #E5E7EB;
  border-radius: 8px;
  box-shadow: 0 4px 12px rgba(0,0,0,0.1);
  min-width: 150px;
  display: none;
  z-index: 1000;
  overflow: hidden;
}

.lang-dropdown-menu.active {
  display: block;
}

.lang-option {
  display: flex;
  align-items: center;
  gap: 12px;
  width: 100%;
  padding: 10px 16px;
  background: none;
  border: none;
  font-family: var(--font-family);
  font-size: var(--font-size-base);
  color: var(--color-text);
  cursor: pointer;
  transition: background-color 0.2s;
  text-align: left;
}

.lang-option:hover {
  background-color: var(--color-bg-light);
}

.lang-option.active {
  background-color: #E8F4F0;
  color: var(--color-secondary);
  font-weight: 600;
}


.lang-option .lang-name {
  flex: 1;
}

/* Mobile utilities - hidden on desktop */
.mobile-utilities {
  display: none;
}

/* Mobile Menu Toggle */
.menu-toggle {
  display: none;
  background: none;
  border: none;
  font-size: 28px;
  cursor: pointer;
  color: var(--color-primary);
  padding: 8px;
}

/* Mobile language cycler */
.mobile-lang-cycler {
  background: none;
  border: 2px solid var(--color-primary);
  border-radius: 50%;
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: var(--transition);
  padding: 0;
}

.mobile-lang-cycler:hover {
  background-color: var(--color-bg-light);
  transform: scale(1.05);
}

.mobile-lang-cycler .flag-icon-round {
  width: 22px;
  height: 22px;
  border-radius: 50%;
  display: block;
  object-fit: cover;
}

/* Theme toggle mobile - same styles as desktop */
.theme-toggle-mobile {
  /* Inherits from .theme-toggle */
}

/* Theme Toggle Button (Dark Mode) */
.theme-toggle {
  background: none;
  border: 2px solid var(--color-primary);
  border-radius: 50%;
  width: 40px;
  height: 40px;
  min-width: 40px;
  min-height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  color: var(--color-primary);
  font-size: 18px;
  line-height: 1;
  transition: var(--transition);
  margin-left: var(--spacing-sm);
  padding: 0;
  flex-shrink: 0;
}

.theme-toggle:hover {
  background-color: var(--color-bg-light);
  transform: rotate(20deg);
}

.theme-toggle:focus {
  outline: 2px solid var(--color-secondary);
  outline-offset: 2px;
}

/* Icône selon le thème */
.theme-toggle-icon-light {
  display: none;
}

[data-theme="dark"] .theme-toggle-icon-light {
  display: inline;
}

[data-theme="dark"] .theme-toggle-icon-dark {
  display: none;
}

/* ===== BACK TO TOP BUTTON ===== */
.back-to-top {
  position: fixed;
  bottom: 30px;
  right: 30px;
  width: 50px;
  height: 50px;
  background-color: var(--color-secondary);
  color: var(--color-white);
  border: none;
  border-radius: 50%;
  font-size: 24px;
  font-weight: bold;
  cursor: pointer;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.3s ease, visibility 0.3s ease, transform 0.3s ease;
  z-index: 999;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
  display: flex;
  align-items: center;
  justify-content: center;
  line-height: 1;
}

.back-to-top.show {
  opacity: 1;
  visibility: visible;
}

.back-to-top:hover {
  background-color: var(--color-primary);
  transform: translateY(-5px);
  box-shadow: 0 6px 16px rgba(0, 0, 0, 0.2);
}

.back-to-top:active {
  transform: translateY(-2px);
}

/* Mobile - Plus petit et plus près du bord */
@media (max-width: 768px) {
  .back-to-top {
    width: 45px;
    height: 45px;
    bottom: 20px;
    right: 20px;
    font-size: 20px;
  }
}

/* ===== HERO SECTION ===== */
.hero {
  background: linear-gradient(135deg, var(--color-bg-light) 0%, var(--color-bg) 100%);
  padding: var(--spacing-xxl) 0;
  text-align: center;
}

.hero-title {
  font-size: 48px;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: var(--spacing-md);
  max-width: 800px;
  margin-left: auto;
  margin-right: auto;
}

.hero-subtitle {
  font-size: var(--font-size-large);
  color: var(--color-text-light);
  margin-bottom: var(--spacing-lg);
  max-width: 700px;
  margin-left: auto;
  margin-right: auto;
  line-height: 1.8;
}

.hero-cta {
  display: flex;
  gap: var(--spacing-sm);
  justify-content: center;
  flex-wrap: wrap;
  margin-top: var(--spacing-lg);
}

/* ===== BUTTONS ===== */
.btn {
  display: inline-block;
  font-family: var(--font-family);
  font-size: var(--font-size-base);
  font-weight: 600;
  padding: 14px 32px;
  border-radius: var(--border-radius);
  text-decoration: none;
  transition: var(--transition);
  cursor: pointer;
  border: 2px solid transparent;
  text-align: center;
  min-width: 180px;
}

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

.btn-primary:hover {
  background-color: #7FA292;
  border-color: #7FA292;
  text-decoration: none;
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(149, 184, 168, 0.3);
}

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

.btn-secondary:hover {
  background-color: var(--color-primary);
  color: var(--color-white);
  text-decoration: none;
  transform: translateY(-2px);
}

.btn:focus {
  outline: 3px solid var(--color-secondary);
  outline-offset: 2px;
}

/* ===== CARDS ===== */
.card {
  background-color: var(--color-white);
  border: 1px solid #E5E7EB;
  border-radius: var(--border-radius);
  padding: var(--spacing-lg);
  transition: var(--transition);
}

.card:hover {
  box-shadow: 0 8px 24px rgba(0,0,0,0.08);
  transform: translateY(-4px);
}

.card-title {
  font-size: var(--font-size-h3);
  margin-bottom: var(--spacing-sm);
  color: var(--color-primary);
}

.card-text {
  color: var(--color-text-light);
  margin-bottom: var(--spacing-md);
}

/* ===== GRID SYSTEM ===== */
.grid {
  display: grid;
  gap: var(--spacing-lg);
}

.grid-2 {
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
}

.grid-3 {
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
}

/* ===== FOOTER ===== */
.footer {
  background-color: var(--color-primary);
  color: var(--color-white);
  padding: var(--spacing-xl) 0 var(--spacing-md);
  margin-top: var(--spacing-xxl);
}

.footer-content {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--spacing-lg);
  margin-bottom: var(--spacing-lg);
}

.footer-section h3 {
  color: var(--color-white);
  margin-bottom: var(--spacing-sm);
  font-size: var(--font-size-h4);
}

.footer-section p,
.footer-section a {
  color: rgba(255, 255, 255, 0.8);
  font-size: var(--font-size-small);
}

.footer-section a:hover {
  color: var(--color-white);
  text-decoration: underline;
}

.footer-links {
  list-style: none;
}

.footer-links li {
  margin-bottom: var(--spacing-xs);
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.2);
  padding-top: var(--spacing-md);
  text-align: center;
  color: rgba(255, 255, 255, 0.7);
  font-size: var(--font-size-small);
}

/* ===== FORMS ===== */
.form-group {
  margin-bottom: var(--spacing-md);
}

.form-label {
  display: block;
  margin-bottom: var(--spacing-xs);
  font-weight: 500;
  color: var(--color-primary);
}

.form-input,
.form-textarea,
.form-select {
  width: 100%;
  font-family: var(--font-family);
  font-size: var(--font-size-base);
  padding: 12px 16px;
  border: 2px solid #E5E7EB;
  border-radius: var(--border-radius);
  transition: var(--transition);
  background-color: var(--color-white);
  color: var(--color-text);
}

.form-input:focus,
.form-textarea:focus,
.form-select:focus {
  outline: none;
  border-color: var(--color-secondary);
  box-shadow: 0 0 0 3px rgba(149, 184, 168, 0.1);
}

.form-textarea {
  min-height: 150px;
  resize: vertical;
}

/* ===== PILOT OFFER SECTION ===== */
.pilot-offer-section {
  background: linear-gradient(135deg, #DBEAFE 0%, #BFDBFE 100%);
  border: 3px solid #3B82F6;
  border-radius: var(--border-radius);
  padding: var(--spacing-xl);
  margin-bottom: var(--spacing-xl);
  text-align: center;
}

.pilot-offer-title {
  color: #1E40AF;
  font-size: 28px;
  margin-bottom: var(--spacing-sm);
}

.pilot-offer-subtitle {
  color: #1E3A8A;
  font-size: var(--font-size-large);
  margin-bottom: var(--spacing-md);
  max-width: 100%;
}

.pilot-offer-text {
  color: #1E3A8A;
  margin-bottom: var(--spacing-lg);
  max-width: 100%;
}

.pilot-offer-buttons {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--spacing-md);
  margin-top: var(--spacing-lg);
  max-width: 900px;
  margin-left: auto;
  margin-right: auto;
}

.pilot-btn {
  width: 100%;
  padding: var(--spacing-sm) var(--spacing-md);
  text-align: center;
  justify-content: center;
}

.pilot-btn-fr {
  background: #3B82F6;
  border-color: #3B82F6;
}

.pilot-btn-fr:hover {
  background: #2563EB;
  border-color: #2563EB;
}

.pilot-btn-es {
  background: #F59E0B;
  border-color: #F59E0B;
}

.pilot-btn-es:hover {
  background: #D97706;
  border-color: #D97706;
}

.pilot-btn-en {
  background: #10B981;
  border-color: #10B981;
}

.pilot-btn-en:hover {
  background: #059669;
  border-color: #059669;
}

/* ===== SUBSCRIPTION BUTTONS ===== */
.subscription-buttons {
  margin-top: var(--spacing-md);
  display: flex;
  flex-direction: column;
  gap: var(--spacing-xs);
  width: 100%;
}

.stripe-btn {
  width: 100%;
  display: none;
  padding: var(--spacing-sm) var(--spacing-md);
  text-align: center;
  justify-content: center;
  font-weight: 600;
}

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

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

.mt-lg {
  margin-top: var(--spacing-lg);
}

.mb-lg {
  margin-bottom: var(--spacing-lg);
}

.hidden {
  display: none;
}

/* ===== RESPONSIVE ===== */
@media (max-width: 1024px) {
  :root {
    --font-size-h1: 32px;
    --font-size-h2: 26px;
    --font-size-h3: 20px;
    --font-size-h4: 18px;
    --spacing-lg: 32px;
    --spacing-xl: 48px;
    --spacing-xxl: 64px;
  }

  .hero-title {
    font-size: 36px;
  }

  /* Hide nav and desktop utilities by default on mobile */
  .nav,
  .nav-utilities {
    display: none;
  }

  /* Show mobile utilities */
  .mobile-utilities {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    margin-left: auto;
  }

  /* Show only nav when menu is active (not utilities, they're always visible) */
  .header-container.menu-active .nav {
    display: block;
  }

  .nav {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background-color: var(--color-white);
    border-top: 1px solid #E5E7EB;
    box-shadow: 0 4px 6px rgba(0,0,0,0.1);
    padding: var(--spacing-md);
    z-index: 999;
  }

  [data-theme="dark"] .nav {
    background-color: var(--color-bg);
    border-top: 1px solid #374151;
  }

  .nav-utilities {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background-color: var(--color-white);
    padding: var(--spacing-md);
    padding-top: 0;
    border-bottom: 1px solid #E5E7EB;
    box-shadow: 0 4px 6px rgba(0,0,0,0.1);
    z-index: 999;
  }

  [data-theme="dark"] .nav-utilities {
    background-color: var(--color-bg);
    border-bottom: 1px solid #374151;
  }

  .nav-list {
    flex-direction: column;
    padding: 0;
    gap: var(--spacing-sm);
  }

  /* Reset desktop styles for mobile */
  .nav-center {
    flex: none;
    position: static;
    transform: none;
    width: 100%;
  }

  .nav-utilities {
    margin-left: 0;
    width: 100%;
    flex-direction: column;
    gap: var(--spacing-sm);
  }

  .lang-switcher-dropdown {
    border-left: none;
    border-top: 1px solid #E5E7EB;
    padding-top: var(--spacing-sm);
    padding-left: 0;
    margin-left: 0;
    width: 100%;
  }

  .theme-toggle {
    margin-left: 0;
    align-self: flex-start;
  }

  .lang-current {
    width: 100%;
    justify-content: space-between;
  }

  .lang-dropdown-menu {
    position: static;
    box-shadow: none;
    border: none;
    border-top: 1px solid #E5E7EB;
    margin-top: var(--spacing-xs);
  }

  .menu-toggle {
    display: block;
  }

  .hero-cta {
    flex-direction: column;
    align-items: center;
  }

  .btn {
    width: 100%;
    max-width: 300px;
  }
}

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

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

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

  .section-lg {
    padding: var(--spacing-xl) 0;
  }
}

/* ===== ACCESSIBILITY ===== */
/* Respect prefers-reduced-motion */
@media (prefers-reduced-motion: reduce) {
  * {
    animation: none !important;
    transition: none !important;
  }

  html {
    scroll-behavior: auto;
  }
}

/* Skip to content link */
.skip-link {
  position: absolute;
  top: -40px;
  left: 0;
  background: var(--color-primary);
  color: var(--color-white);
  padding: 8px 16px;
  text-decoration: none;
  z-index: 10000;
}

.skip-link:focus {
  top: 0;
}