/*
 * RSS BATIMENT - Site Web Corporate
 * Schéma de couleurs: Slate & Red (Light Mode: #2b2d42, #8d99ae, #edf2f4, #ef233c, #ffffff)
 * Thème: Luxe Parisien Minimaliste avec accents Deep Noir, Ivory Silk, Royal Gold
 */

/* ============================================
   VARIABLES CSS & THÈME
   ============================================ */

:root {
  /* Couleurs principales - Mode Clair (Slate & Red) */
  --color-primary: #2b2d42;
  --color-secondary: #8d99ae;
  --color-accent: #edf2f4;
  --color-neutral: #ef233c;
  --color-bg: #ffffff;
  --color-text: #1a1a1a;

  /* Couleurs de luxe Parisien (Deep Noir, Ivory Silk, Royal Gold) */
  --color-deep-noir: #050505;
  --color-ivory-silk: #F9F9F9;
  --color-royal-gold: #D4AF37;

  /* Couleurs sémantiques */
  --color-success: #28a745;
  --color-warning: #ffc107;
  --color-error: #dc3545;
  --color-info: #17a2b8;

  /* Typographie */
  --font-primary: 'Montserrat', 'Helvetica Neue', Arial, sans-serif;
  --font-secondary: 'Lato', 'Segoe UI', Tahoma, sans-serif;
  --font-serif: 'Didot', 'Bodoni MT', 'Times New Roman', serif;

  /* Espacement */
  --spacing-xs: 0.25rem;
  --spacing-sm: 0.5rem;
  --spacing-md: 1rem;
  --spacing-lg: 2rem;
  --spacing-xl: 3rem;
  --spacing-xxl: 5rem;

  /* Bordures */
  --border-radius-sm: 4px;
  --border-radius-md: 8px;
  --border-radius-lg: 12px;
  --border-thin: 0.5px;

  /* Ombres */
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.12), 0 1px 2px rgba(0, 0, 0, 0.24);
  --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 10px 25px rgba(0, 0, 0, 0.15);
  --shadow-luxury: 0 2px 20px rgba(212, 175, 55, 0.2);

  /* Transitions */
  --transition-fast: 150ms ease-in-out;
  --transition-normal: 300ms ease-in-out;
  --transition-slow: 500ms ease-in-out;

  /* Z-index */
  --z-dropdown: 1000;
  --z-sticky: 1020;
  --z-fixed: 1030;
  --z-modal-backdrop: 1040;
  --z-modal: 1050;
  --z-popover: 1060;
  --z-tooltip: 1070;
}

/* Mode Sombre */
[data-theme="dark"] {
  --color-primary: #edf2f4;
  --color-secondary: #8d99ae;
  --color-accent: #2b2d42;
  --color-neutral: #ef233c;
  --color-bg: #0a0a0a;
  --color-text: #f0f0f0;
  --color-ivory-silk: #1a1a1a;
  --color-deep-noir: #f9f9f9;
}

/* ============================================
   RESET & BASE
   ============================================ */

*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

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

body {
  font-family: var(--font-secondary);
  font-size: 1rem;
  line-height: 1.6;
  color: var(--color-text);
  background-color: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* ============================================
   TYPOGRAPHIE
   ============================================ */

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-primary);
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: var(--spacing-md);
  color: var(--color-deep-noir);
}

[data-theme="dark"] h1,
[data-theme="dark"] h2,
[data-theme="dark"] h3,
[data-theme="dark"] h4,
[data-theme="dark"] h5,
[data-theme="dark"] h6 {
  color: var(--color-ivory-silk);
}

h1 { font-size: clamp(2rem, 5vw, 3.5rem); }
h2 { font-size: clamp(1.75rem, 4vw, 2.5rem); }
h3 { font-size: clamp(1.5rem, 3vw, 2rem); }
h4 { font-size: clamp(1.25rem, 2.5vw, 1.75rem); }
h5 { font-size: clamp(1.1rem, 2vw, 1.5rem); }
h6 { font-size: clamp(1rem, 1.5vw, 1.25rem); }

/* Titres avec style de luxe */
.luxury-title {
  font-family: var(--font-serif);
  font-weight: 400;
  letter-spacing: 0.05em;
  position: relative;
  display: inline-block;
}

.luxury-title::after {
  content: '';
  position: absolute;
  bottom: -8px;
  left: 0;
  width: 60px;
  height: 2px;
  background: linear-gradient(90deg, var(--color-royal-gold), transparent);
}

/* Texte décoratif */
.text-gold {
  color: var(--color-royal-gold);
}

.text-gradient {
  background: linear-gradient(135deg, var(--color-deep-noir), var(--color-royal-gold));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

[data-theme="dark"] .text-gradient {
  background: linear-gradient(135deg, var(--color-ivory-silk), var(--color-royal-gold));
  -webkit-background-clip: text;
  background-clip: text;
}

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

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

a:hover {
  color: var(--color-royal-gold);
}

/* ============================================
   MISE EN PAGE & GRILLE
   ============================================ */

.container {
  width: 100%;
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 var(--spacing-md);
}

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

.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));
}

.grid-4 {
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
}

@media (min-width: 768px) {
  .grid-2 { grid-template-columns: repeat(2, 1fr); }
  .grid-3 { grid-template-columns: repeat(3, 1fr); }
  .grid-4 { grid-template-columns: repeat(4, 1fr); }
}

/* ============================================
   HEADER & NAVIGATION
   ============================================ */

.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: var(--z-fixed);
  background: transparent;
  transition: background-color var(--transition-normal), box-shadow var(--transition-normal);
  padding: var(--spacing-md) 0;
}

.header.scrolled {
  background: rgba(249, 249, 249, 0.95);
  backdrop-filter: blur(10px);
  box-shadow: var(--shadow-md);
  padding: var(--spacing-sm) 0;
}

[data-theme="dark"] .header.scrolled {
  background: rgba(10, 10, 10, 0.95);
}

.header-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 var(--spacing-md);
}

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

.header-logo img {
  width: 232px;
  height: auto;
  max-height: 70px;
  object-fit: contain;
}

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

.nav-list {
  display: flex;
  list-style: none;
  gap: var(--spacing-lg);
  margin: 0;
  padding: 0;
}

.nav-link {
  position: relative;
  font-family: var(--font-primary);
  font-size: 0.875rem;
  font-weight: 500;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-deep-noir);
  padding: var(--spacing-xs) 0;
  transition: color var(--transition-fast);
}

[data-theme="dark"] .nav-link {
  color: var(--color-ivory-silk);
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 1px;
  background-color: var(--color-royal-gold);
  transition: width var(--transition-normal);
}

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

.nav-link:hover,
.nav-link.active {
  color: var(--color-royal-gold);
}

/* Nav Icons */
.nav-icon {
  font-size: 1.25rem;
  display: flex;
  align-items: center;
  justify-content: center;
}

/* Theme Toggle */
.theme-toggle {
  background: none;
  border: none;
  cursor: pointer;
  padding: var(--spacing-sm);
  color: var(--color-deep-noir);
  transition: color var(--transition-fast), transform var(--transition-normal);
}

[data-theme="dark"] .theme-toggle {
  color: var(--color-ivory-silk);
}

.theme-toggle:hover {
  color: var(--color-royal-gold);
  transform: rotate(20deg);
}

/* Mobile Menu Toggle */
.menu-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: var(--spacing-sm);
  flex-direction: column;
  gap: 4px;
}

.menu-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background-color: var(--color-deep-noir);
  transition: all var(--transition-normal);
}

[data-theme="dark"] .menu-toggle span {
  background-color: var(--color-ivory-silk);
}

.menu-toggle.active span:nth-child(1) {
  transform: rotate(45deg) translate(4px, 4px);
}

.menu-toggle.active span:nth-child(2) {
  opacity: 0;
}

.menu-toggle.active span:nth-child(3) {
  transform: rotate(-45deg) translate(4px, -4px);
}

/* Mobile Navigation */
@media (max-width: 768px) {
  .menu-toggle {
    display: flex;
  }

  .header-nav {
    position: fixed;
    top: 0;
    right: -100%;
    width: 100%;
    height: 100vh;
    background: var(--color-ivory-silk);
    flex-direction: column;
    justify-content: center;
    align-items: center;
    transition: right var(--transition-normal);
    z-index: var(--z-modal);
  }

  [data-theme="dark"] .header-nav {
    background: var(--color-deep-noir);
  }

  .header-nav.active {
    right: 0;
  }

  .nav-list {
    flex-direction: column;
    text-align: center;
  }

  .nav-link {
    font-size: 1.5rem;
    font-family: var(--font-serif);
  }
}

/* ============================================
   HERO SECTION
   ============================================ */

.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: -1;
}

.hero-bg img,
.hero-bg video {
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: blur(3px);
}

.hero-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(135deg, rgba(5, 5, 5, 0.7) 0%, rgba(5, 5, 5, 0.3) 100%);
  z-index: 0;
}

.hero-content {
  position: relative;
  z-index: 1;
  text-align: center;
  color: var(--color-ivory-silk);
  padding: var(--spacing-xl);
  max-width: 900px;
}

.hero-title {
  font-family: var(--font-serif);
  font-size: clamp(2.5rem, 6vw, 4.5rem);
  font-weight: 400;
  letter-spacing: 0.05em;
  margin-bottom: var(--spacing-md);
  opacity: 0;
  animation: fadeInUp 1s ease forwards 0.3s;
}

.hero-subtitle {
  font-size: clamp(1rem, 2vw, 1.25rem);
  font-weight: 300;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  margin-bottom: var(--spacing-xl);
  opacity: 0;
  animation: fadeInUp 1s ease forwards 0.5s;
}

.hero-description {
  font-size: clamp(1rem, 1.5vw, 1.125rem);
  line-height: 1.8;
  margin-bottom: var(--spacing-xl);
  opacity: 0;
  animation: fadeInUp 1s ease forwards 0.7s;
}

/* Hero CTA Buttons */
.hero-cta {
  display: flex;
  gap: var(--spacing-md);
  justify-content: center;
  flex-wrap: wrap;
  opacity: 0;
  animation: fadeInUp 1s ease forwards 0.9s;
}

/* ============================================
   BOUTONS
   ============================================ */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-md) var(--spacing-xl);
  font-family: var(--font-primary);
  font-size: 0.875rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  border: none;
  border-radius: 0;
  cursor: pointer;
  transition: all var(--transition-normal);
  text-decoration: none;
  position: relative;
  overflow: hidden;
}

.btn::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
  transition: left var(--transition-slow);
}

.btn:hover::before {
  left: 100%;
}

.btn-primary {
  background-color: var(--color-royal-gold);
  color: var(--color-deep-noir);
}

.btn-primary:hover {
  background-color: #c9a52a;
  transform: translateY(-2px);
  box-shadow: var(--shadow-luxury);
}

.btn-outline {
  background-color: transparent;
  color: var(--color-ivory-silk);
  border: 1px solid var(--color-ivory-silk);
}

.btn-outline:hover {
  background-color: var(--color-ivory-silk);
  color: var(--color-deep-noir);
  transform: translateY(-2px);
}

.btn-outline-light {
  background-color: transparent;
  color: var(--color-primary);
  border: 1px solid var(--color-primary);
}

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

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

.btn-secondary:hover {
  background-color: var(--color-deep-noir);
  transform: translateY(-2px);
}

.btn-lg {
  padding: var(--spacing-lg) var(--spacing-xxl);
  font-size: 1rem;
}

.btn-sm {
  padding: var(--spacing-sm) var(--spacing-md);
  font-size: 0.75rem;
}

/* ============================================
   CARTES
   ============================================ */

.card {
  background-color: var(--color-bg);
  border: var(--border-thin) solid rgba(212, 175, 55, 0.3);
  border-radius: var(--border-radius-lg);
  padding: var(--spacing-xl);
  transition: all var(--transition-normal);
  position: relative;
  overflow: hidden;
}

.card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 3px;
  background: linear-gradient(90deg, var(--color-royal-gold), var(--color-deep-noir));
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--transition-normal);
}

.card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-lg);
}

.card:hover::before {
  transform: scaleX(1);
}

.card-image {
  position: relative;
  width: 100%;
  height: 250px;
  overflow: hidden;
  border-radius: var(--border-radius-md);
  margin-bottom: var(--spacing-lg);
}

.card-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-slow);
}

.card:hover .card-image img {
  transform: scale(1.1);
}

.card-content {
  position: relative;
  z-index: 1;
}

.card-title {
  font-family: var(--font-serif);
  font-size: 1.5rem;
  font-weight: 400;
  margin-bottom: var(--spacing-md);
  color: var(--color-deep-noir);
}

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

.card-description {
  color: var(--color-secondary);
  margin-bottom: var(--spacing-lg);
}

.card-link {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-xs);
  color: var(--color-royal-gold);
  font-weight: 600;
  font-size: 0.875rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
}

.card-link:hover {
  gap: var(--spacing-sm);
}

/* ============================================
   SECTIONS
   ============================================ */

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

.section-title {
  font-family: var(--font-serif);
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 400;
  margin-bottom: var(--spacing-md);
  color: var(--color-deep-noir);
}

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

.section-subtitle {
  font-size: 0.875rem;
  font-weight: 600;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--color-royal-gold);
  margin-bottom: var(--spacing-md);
  display: block;
}

/* Section avec fond d'image */
.section-with-bg {
  position: relative;
  background-size: cover;
  background-position: center;
  background-attachment: fixed;
}

.section-with-bg::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(249, 249, 249, 0.92);
  backdrop-filter: blur(3px);
}

[data-theme="dark"] .section-with-bg::before {
  background: rgba(10, 10, 10, 0.92);
}

.section-with-bg > .container {
  position: relative;
  z-index: 1;
}

/* Section neutre */
.section-neutral {
  background-color: var(--color-ivory-silk);
}

[data-theme="dark"] .section-neutral {
  background-color: var(--color-deep-noir);
}

/* Section primaire */
.section-primary {
  background-color: var(--color-primary);
  color: var(--color-bg);
}

.section-primary .section-title,
.section-primary h1,
.section-primary h2,
.section-primary h3 {
  color: var(--color-bg);
}

/* ============================================
   SERVICES
   ============================================ */

.service-card {
  text-align: center;
  padding: var(--spacing-xl);
  background: var(--color-bg);
  border: var(--border-thin) solid rgba(212, 175, 55, 0.2);
  transition: all var(--transition-normal);
}

.service-card:hover {
  border-color: var(--color-royal-gold);
  box-shadow: var(--shadow-luxury);
  transform: translateY(-5px);
}

.service-icon {
  width: 80px;
  height: 80px;
  margin: 0 auto var(--spacing-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2.5rem;
  color: var(--color-royal-gold);
  background: linear-gradient(135deg, rgba(212, 175, 55, 0.1), rgba(212, 175, 55, 0.05));
  border-radius: 50%;
}

.service-title {
  font-family: var(--font-serif);
  font-size: 1.5rem;
  margin-bottom: var(--spacing-md);
}

.service-list {
  list-style: none;
  text-align: left;
  margin-top: var(--spacing-lg);
}

.service-list li {
  padding: var(--spacing-sm) 0;
  border-bottom: var(--border-thin) solid rgba(212, 175, 55, 0.1);
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}

.service-list li::before {
  content: '✦';
  color: var(--color-royal-gold);
}

/* ============================================
   FORMULAIRES
   ============================================ */

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

.form-label {
  display: block;
  font-family: var(--font-primary);
  font-size: 0.875rem;
  font-weight: 600;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  margin-bottom: var(--spacing-sm);
  color: var(--color-deep-noir);
}

[data-theme="dark"] .form-label {
  color: var(--color-ivory-silk);
}

.form-input,
.form-textarea,
.form-select {
  width: 100%;
  padding: var(--spacing-md);
  font-family: var(--font-secondary);
  font-size: 1rem;
  color: var(--color-text);
  background-color: var(--color-bg);
  border: var(--border-thin) solid rgba(212, 175, 55, 0.3);
  border-radius: var(--border-radius-sm);
  transition: all var(--transition-fast);
}

.form-input:focus,
.form-textarea:focus,
.form-select:focus {
  outline: none;
  border-color: var(--color-royal-gold);
  box-shadow: 0 0 0 3px rgba(212, 175, 55, 0.1);
}

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

.form-checkbox {
  display: flex;
  align-items: flex-start;
  gap: var(--spacing-sm);
}

.form-checkbox input[type="checkbox"] {
  width: 20px;
  height: 20px;
  accent-color: var(--color-royal-gold);
  margin-top: 2px;
}

.form-checkbox-label {
  font-size: 0.875rem;
  color: var(--color-secondary);
}

.form-error {
  color: var(--color-error);
  font-size: 0.875rem;
  margin-top: var(--spacing-xs);
}

/* ============================================
   FOOTER
   ============================================ */

.footer {
  background-color: var(--color-deep-noir);
  color: var(--color-ivory-silk);
  padding: var(--spacing-xxl) 0 var(--spacing-lg);
}

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

.footer-section {
  padding: var(--spacing-md);
}

.footer-title {
  font-family: var(--font-serif);
  font-size: 1.25rem;
  font-weight: 400;
  margin-bottom: var(--spacing-lg);
  color: var(--color-royal-gold);
}

.footer-text {
  color: rgba(249, 249, 249, 0.7);
  line-height: 1.8;
  margin-bottom: var(--spacing-md);
}

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

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

.footer-links a {
  color: rgba(249, 249, 249, 0.7);
  transition: all var(--transition-fast);
}

.footer-links a:hover {
  color: var(--color-royal-gold);
  padding-left: 5px;
}

.footer-contact-item {
  display: flex;
  align-items: flex-start;
  gap: var(--spacing-md);
  margin-bottom: var(--spacing-md);
}

.footer-contact-icon {
  color: var(--color-royal-gold);
  font-size: 1.25rem;
  flex-shrink: 0;
}

.footer-contact-text {
  color: rgba(249, 249, 249, 0.7);
}

.footer-bottom {
  border-top: 1px solid rgba(212, 175, 55, 0.2);
  padding-top: var(--spacing-lg);
  text-align: center;
}

.footer-copyright {
  color: rgba(249, 249, 249, 0.5);
  font-size: 0.875rem;
}

.footer-legal-links {
  display: flex;
  justify-content: center;
  gap: var(--spacing-lg);
  margin-top: var(--spacing-md);
  flex-wrap: wrap;
}

.footer-legal-links a {
  color: rgba(249, 249, 249, 0.6);
  font-size: 0.875rem;
}

/* ============================================
   ANIMATIONS
   ============================================ */

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

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

@keyframes slideInLeft {
  from {
    opacity: 0;
    transform: translateX(-30px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes slideInRight {
  from {
    opacity: 0;
    transform: translateX(30px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

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

/* ============================================
   UTILITAIRES
   ============================================ */

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

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

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

.pt-1 { padding-top: var(--spacing-md); }
.pt-2 { padding-top: var(--spacing-lg); }
.pt-3 { padding-top: var(--spacing-xl); }
.pt-4 { padding-top: var(--spacing-xxl); }

.pb-1 { padding-bottom: var(--spacing-md); }
.pb-2 { padding-bottom: var(--spacing-lg); }
.pb-3 { padding-bottom: var(--spacing-xl); }
.pb-4 { padding-bottom: var(--spacing-xxl); }

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

@media (max-width: 768px) {
  .d-md-none { display: none; }
}

@media (min-width: 769px) {
  .d-md-block { display: block; }
  .d-md-flex { display: flex; }
}

/* ============================================
   ACCESSIBILITÉ
   ============================================ */

.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;
}

.focus-visible:focus {
  outline: 2px solid var(--color-royal-gold);
  outline-offset: 2px;
}

/* Skip Links */
.skip-links {
  position: fixed;
  top: -100px;
  left: 0;
  right: 0;
  z-index: var(--z-tooltip);
  text-align: center;
}

.skip-links a {
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  padding: var(--spacing-md);
  background: var(--color-royal-gold);
  color: var(--color-deep-noir);
  font-weight: 600;
}

.skip-links a:focus {
  top: 100px;
}

/* ============================================
   MEDIA QUERIES
   ============================================ */

@media (max-width: 768px) {
  :root {
    --spacing-xxl: 3rem;
  }

  .container {
    padding: 0 var(--spacing-sm);
  }

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

  .btn {
    width: 100%;
  }

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

/* ============================================
   IMPRESSION
   ============================================ */

@media print {
  .header,
  .footer,
  .theme-toggle,
  .menu-toggle {
    display: none;
  }

  .section {
    page-break-inside: avoid;
  }

  a {
    text-decoration: underline;
  }

  a[href^="http"]::after {
    content: " (" attr(href) ")";
  }
}