/*
 * ETS LORTON - Styles CSS
 * Thème industriel professionnel français
 * Palette: Charcoal (#333333), Steel Blue (#4682B4), Safety Orange (#FF8C00)
 * Typographie: Montserrat (titres), Lato (corps)
 */

/* ========================================
   VARIABLES CSS - THÈME INDUSTRIEL
   ======================================== */
:root {
  /* Couleurs principales - Mode Clair */
  --primary-color: #1d3557;
  --secondary-color: #457b9d;
  --accent-color: #a8dadc;
  --neutral-color: #f1faee;
  --bg-color: #ffffff;
  --text-color: #1a1a1a;

  /* Couleurs industrielles */
  --charcoal: #333333;
  --steel-blue: #4682B4;
  --safety-orange: #FF8C00;

  /* Couleurs de l'interface */
  --header-bg: #1a1a1a;
  --header-text: #ffffff;
  --nav-hover: #4682B4;
  --card-bg: #ffffff;
  --card-shadow: rgba(0, 0, 0, 0.1);

  /* Typographie */
  --font-primary: 'Montserrat', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-secondary: 'Lato', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;

  /* Espacement */
  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 2rem;
  --spacing-lg: 4rem;
  --spacing-xl: 6rem;

  /* Bordures */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;

  /* Transitions */
  --transition-fast: 0.2s ease;
  --transition-normal: 0.3s ease;
}

/* Mode Sombre */
[data-theme="dark"] {
  --primary-color: #4682B4;
  --secondary-color: #5a9bc4;
  --accent-color: #FF8C00;
  --neutral-color: #2d3748;
  --bg-color: #1a1a1a;
  --text-color: #e0e0e0;

  --charcoal: #1a1a1a;
  --steel-blue: #5a9bc4;
  --safety-orange: #FF8C00;

  --header-bg: #0d0d0d;
  --header-text: #ffffff;
  --nav-hover: #FF8C00;
  --card-bg: #2d3748;
  --card-shadow: rgba(0, 0, 0, 0.3);
}

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

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

body {
  font-family: var(--font-secondary);
  background-color: var(--bg-color);
  color: var(--text-color);
  line-height: 1.6;
  overflow-x: hidden;
  transition: background-color var(--transition-normal), color var(--transition-normal);
}

/* ========================================
   TYPOGRAPHIE
   ======================================== */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-primary);
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: var(--spacing-sm);
  color: var(--text-color);
}

h1 { font-size: clamp(2rem, 5vw, 3.5rem); }
h2 { font-size: clamp(1.75rem, 4vw, 2.5rem); }
h3 { font-size: clamp(1.25rem, 3vw, 1.75rem); }
h4 { font-size: clamp(1rem, 2vw, 1.5rem); }

p {
  margin-bottom: var(--spacing-sm);
  font-size: 1rem;
}

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

[data-theme="dark"] a {
  color: var(--steel-blue);
}

a:hover {
  color: var(--safety-orange);
}

/* ========================================
   EN-TÊTE (HEADER)
   ======================================== */
.header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background-color: var(--header-bg);
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
  transition: background-color var(--transition-normal);
}

.header-container {
  max-width: 1400px;
  margin: 0 auto;
  padding: var(--spacing-sm) var(--spacing-md);
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: var(--spacing-md);
}

.header-logo {
  flex-shrink: 0;
}

.header-logo img {
  width: auto;
  height: 60px;
  max-width: 200px;
  object-fit: contain;
}

.header-logo svg {
  width: auto;
  height: 60px;
  max-width: 200px;
}

.header-content {
  flex: 1;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: var(--spacing-md);
}

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

.header-nav-list {
  display: flex;
  list-style: none;
  gap: var(--spacing-sm);
  flex-wrap: wrap;
}

.header-nav-link {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 1rem;
  color: var(--header-text);
  font-weight: 500;
  border-radius: var(--radius-sm);
  transition: all var(--transition-fast);
  white-space: nowrap;
}

.header-nav-link:hover,
.header-nav-link.active {
  background-color: var(--nav-hover);
  color: #ffffff;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}

.header-contact {
  display: flex;
  flex-direction: column;
  font-size: 0.875rem;
  color: var(--header-text);
}

.header-contact a {
  color: var(--header-text);
  font-weight: 500;
}

.header-contact a:hover {
  color: var(--safety-orange);
}

/* Toggle Theme */
.theme-toggle {
  background: var(--steel-blue);
  border: none;
  color: #ffffff;
  width: 44px;
  height: 44px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition-fast);
}

.theme-toggle:hover {
  background: var(--safety-orange);
  transform: scale(1.05);
}

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

/* Mobile Menu */
.mobile-menu-btn {
  display: none;
  background: transparent;
  border: none;
  color: var(--header-text);
  font-size: 1.5rem;
  cursor: pointer;
  padding: 0.5rem;
}

/* ========================================
   SECTION HERO
   ======================================== */
.hero {
  position: relative;
  min-height: 80vh;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.hero-media {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  filter: blur(3px);
}

.hero-media img,
.hero-media video {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.hero-overlay {
  position: relative;
  z-index: 1;
  max-width: 800px;
  padding: var(--spacing-lg) var(--spacing-md);
  text-align: center;
}

.hero-title {
  font-size: clamp(2.5rem, 6vw, 4rem);
  font-weight: 800;
  color: #ffffff;
  text-shadow: 2px 2px 8px rgba(0, 0, 0, 0.7);
  margin-bottom: var(--spacing-md);
  letter-spacing: -0.02em;
}

.hero-subtitle {
  font-size: clamp(1.25rem, 3vw, 1.75rem);
  color: #f0f0f0;
  text-shadow: 1px 1px 4px rgba(0, 0, 0, 0.7);
  margin-bottom: var(--spacing-lg);
  font-weight: 400;
}

.hero-cta {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  padding: 1rem 2rem;
  background-color: var(--safety-orange);
  color: #ffffff;
  font-size: 1.125rem;
  font-weight: 600;
  border-radius: var(--radius-sm);
  transition: all var(--transition-fast);
  box-shadow: 0 4px 12px rgba(255, 140, 0, 0.3);
}

.hero-cta:hover {
  background-color: #e07b00;
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(255, 140, 0, 0.4);
}

.hero-cta:focus {
  outline: 3px solid #ffffff;
  outline-offset: 3px;
}

/* ========================================
   SECTIONS GÉNÉRALES
   ======================================== */
.section {
  padding: var(--spacing-xl) var(--spacing-md);
  max-width: 1400px;
  margin: 0 auto;
}

.section-header {
  text-align: center;
  margin-bottom: var(--spacing-lg);
}

.section-title {
  font-size: clamp(2rem, 5vw, 3rem);
  color: var(--primary-color);
  margin-bottom: var(--spacing-sm);
  position: relative;
  display: inline-block;
}

[data-theme="dark"] .section-title {
  color: var(--steel-blue);
}

.section-title::after {
  content: '';
  position: absolute;
  bottom: -0.5rem;
  left: 50%;
  transform: translateX(-50%);
  width: 80px;
  height: 4px;
  background: linear-gradient(90deg, var(--safety-orange), var(--steel-blue));
}

.section-subtitle {
  font-size: 1.125rem;
  color: var(--text-color);
  opacity: 0.8;
  max-width: 600px;
  margin: 0 auto;
}

/* ========================================
   SECTION AVEC FOND D'IMAGE
   ======================================== */
.section-with-bg {
  position: relative;
  padding: var(--spacing-xl) var(--spacing-md);
  overflow: hidden;
}

.section-bg {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  filter: blur(3px);
  z-index: 0;
}

.section-bg img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.section-bg-content {
  position: relative;
  z-index: 1;
  max-width: 1400px;
  margin: 0 auto;
}

/* ========================================
   GRILLES ET CARTEUX
   ======================================== */
.grid {
  display: grid;
  gap: var(--spacing-md);
}

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

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

.grid-4 {
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
}

.card {
  background-color: var(--card-bg);
  border-radius: var(--radius-md);
  padding: var(--spacing-md);
  box-shadow: 0 4px 12px var(--card-shadow);
  transition: all var(--transition-normal);
  border-top: 3px solid var(--steel-blue);
}

.card:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 24px var(--card-shadow);
  border-top-color: var(--safety-orange);
}

.card-icon {
  width: 60px;
  height: 60px;
  background: linear-gradient(135deg, var(--steel-blue), var(--primary-color));
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--spacing-sm);
}

.card-icon span {
  font-size: 2rem;
  color: #ffffff;
}

.card-title {
  font-size: 1.5rem;
  color: var(--primary-color);
  margin-bottom: var(--spacing-sm);
}

[data-theme="dark"] .card-title {
  color: var(--steel-blue);
}

.card-content {
  color: var(--text-color);
  opacity: 0.9;
}

.card-link {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  margin-top: var(--spacing-sm);
  color: var(--safety-orange);
  font-weight: 600;
}

.card-link:hover {
  color: var(--steel-blue);
}

/* ========================================
   BOUTONS
   ======================================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.75rem 1.5rem;
  font-family: var(--font-primary);
  font-size: 1rem;
  font-weight: 600;
  border: none;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all var(--transition-fast);
  text-decoration: none;
}

.btn-primary {
  background-color: var(--safety-orange);
  color: #ffffff;
}

.btn-primary:hover {
  background-color: #e07b00;
  transform: translateY(-2px);
}

.btn-secondary {
  background-color: var(--steel-blue);
  color: #ffffff;
}

.btn-secondary:hover {
  background-color: #3a6d99;
  transform: translateY(-2px);
}

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

[data-theme="dark"] .btn-outline {
  color: var(--steel-blue);
  border-color: var(--steel-blue);
}

.btn-outline:hover {
  background-color: var(--primary-color);
  color: #ffffff;
}

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

/* ========================================
   FORMULAIRES
   ======================================== */
.form {
  max-width: 600px;
  margin: 0 auto;
}

.form-group {
  margin-bottom: var(--spacing-sm);
}

.form-label {
  display: block;
  margin-bottom: 0.5rem;
  font-weight: 600;
  color: var(--text-color);
}

.form-input,
.form-textarea,
.form-select {
  width: 100%;
  padding: 0.75rem 1rem;
  border: 2px solid #ddd;
  border-radius: var(--radius-sm);
  font-family: var(--font-secondary);
  font-size: 1rem;
  background-color: var(--card-bg);
  color: var(--text-color);
  transition: border-color var(--transition-fast);
}

.form-input:focus,
.form-textarea:focus,
.form-select:focus {
  outline: none;
  border-color: var(--steel-blue);
}

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

.form-checkbox {
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
}

.form-checkbox input[type="checkbox"] {
  width: 20px;
  height: 20px;
  margin-top: 0.25rem;
  accent-color: var(--safety-orange);
}

.form-checkbox-label {
  font-size: 0.9rem;
  color: var(--text-color);
  opacity: 0.9;
}

/* ========================================
   CONTACT ET CARTES
   ======================================== */
.contact-info {
  display: grid;
  gap: var(--spacing-md);
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
}

.contact-card {
  background-color: var(--card-bg);
  border-radius: var(--radius-md);
  padding: var(--spacing-md);
  text-align: center;
  box-shadow: 0 4px 12px var(--card-shadow);
  transition: all var(--transition-normal);
}

.contact-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 24px var(--card-shadow);
}

.contact-card-icon {
  width: 60px;
  height: 60px;
  background: linear-gradient(135deg, var(--steel-blue), var(--primary-color));
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto var(--spacing-sm);
}

.contact-card-icon span {
  font-size: 1.5rem;
  color: #ffffff;
}

.contact-card-title {
  font-weight: 700;
  margin-bottom: 0.5rem;
  color: var(--primary-color);
}

[data-theme="dark"] .contact-card-title {
  color: var(--steel-blue);
}

.contact-card-content {
  color: var(--text-color);
  opacity: 0.9;
}

.contact-card-content a {
  color: var(--steel-blue);
}

.contact-card-content a:hover {
  color: var(--safety-orange);
}

.map-container {
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: 0 4px 12px var(--card-shadow);
}

.map-container iframe {
  width: 100%;
  height: 450px;
  border: none;
}

/* ========================================
   PIED DE PAGE (FOOTER)
   ======================================== */
.footer {
  background-color: var(--charcoal);
  color: #e0e0e0;
  padding: var(--spacing-lg) var(--spacing-md) var(--spacing-md);
}

.footer-container {
  max-width: 1400px;
  margin: 0 auto;
}

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

.footer-section-title {
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: var(--spacing-sm);
  color: #ffffff;
}

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

.footer-links li {
  margin-bottom: 0.5rem;
}

.footer-links a {
  color: #e0e0e0;
  transition: color var(--transition-fast);
}

.footer-links a:hover {
  color: var(--safety-orange);
}

.footer-contact-item {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 0.75rem;
  color: #e0e0e0;
}

.footer-contact-item span {
  color: var(--safety-orange);
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding-top: var(--spacing-md);
  text-align: center;
  font-size: 0.9rem;
  color: #a0a0a0;
}

/* ========================================
   ACCESSIBILITÉ
   ======================================== */
.skip-link {
  position: absolute;
  top: -100%;
  left: 0;
  background-color: var(--safety-orange);
  color: #ffffff;
  padding: 1rem;
  z-index: 9999;
}

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

/* Focus visible pour accessibilité */
:focus-visible {
  outline: 3px solid var(--safety-orange);
  outline-offset: 2px;
}

/* ========================================
   IMAGES RESPONSIVES
   ======================================== */
img {
  max-width: 100%;
  height: auto;
  display: block;
}

/* ========================================
   ANIMATIONS
   ======================================== */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.fade-in {
  animation: fadeInUp 0.6s ease-out;
}

/* ========================================
   RESPONSIVE
   ======================================== */
@media (max-width: 1024px) {
  .header-content {
    flex-wrap: wrap;
  }

  .header-nav {
    order: 3;
    width: 100%;
  }

  .header-nav-list {
    justify-content: center;
  }
}

@media (max-width: 768px) {
  .mobile-menu-btn {
    display: block;
  }

  .header-nav-list {
    flex-direction: column;
    align-items: stretch;
    display: none;
  }

  .header-nav-list.active {
    display: flex;
  }

  .header-nav-link {
    justify-content: center;
  }

  .header-contact {
    display: none;
  }

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

  .grid-2,
  .grid-3,
  .grid-4 {
    grid-template-columns: 1fr;
  }

  .hero-title {
    font-size: 2rem;
  }

  .hero-subtitle {
    font-size: 1.25rem;
  }
}

@media (max-width: 480px) {
  html {
    font-size: 14px;
  }

  .header-container {
    padding: var(--spacing-sm);
  }

  .hero {
    min-height: 60vh;
  }
}

/* ========================================
   IMPRESSION
   ======================================== */
@media print {
  .header,
  .footer,
  .btn,
  .theme-toggle {
    display: none;
  }

  body {
    background-color: #ffffff;
    color: #000000;
  }

  .card {
    break-inside: avoid;
  }
}

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

.text-muted {
  opacity: 0.7;
}

.mt-sm { margin-top: var(--spacing-sm); }
.mt-md { margin-top: var(--spacing-md); }
.mb-sm { margin-bottom: var(--spacing-sm); }
.mb-md { margin-bottom: var(--spacing-md); }

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