/* ============================================================
   M3DC — Unified Luxury Stylesheet
   Haute horlogerie / Architecture portfolio aesthetic
   ============================================================ */

/* --- Google Fonts --- */
@import url('https://fonts.googleapis.com/css2?family=Playfair+Display:ital,wght@0,400;0,500;0,600;0,700;1,400;1,500&family=Cormorant+Garamond:ital,wght@0,300;0,400;0,500;0,600;1,300;1,400;1,500;1,600&family=Inter:wght@300;400;500;600&display=swap');

/* ============================================================
   1. CSS VARIABLES
   ============================================================ */
:root {
  /* Palette */
  --noir:          #0D0D0D;
  --warm-dark:     #141210;
  --card:          #1A1714;
  --card-border:   rgba(201, 168, 76, 0.12);
  --or:            #C9A84C;
  --or-clair:      #D4B96A;
  --or-muted:      rgba(201, 168, 76, 0.35);
  --texte:         rgba(250, 250, 248, 0.85);
  --texte-muted:   rgba(250, 250, 248, 0.50);
  --texte-faint:   rgba(250, 250, 248, 0.30);
  --blanc:         #FAFAF8;
  --overlay:       rgba(13, 13, 13, 0.55);

  /* Fonts */
  --font-heading:  'Playfair Display', Georgia, serif;
  --font-accent:   'Cormorant Garamond', Garamond, serif;
  --font-body:     'Inter', -apple-system, sans-serif;

  /* Spacing */
  --section-pad:   100px;
  --inner-max:     1100px;
  --gap:           28px;

  /* Transitions */
  --ease:          cubic-bezier(0.25, 0.46, 0.45, 0.94);
  --ease-out:      cubic-bezier(0.22, 1, 0.36, 1);
  --speed:         0.4s;
  --speed-fast:    0.25s;

  /* Header */
  --header-h:      90px;
  --header-h-scrolled: 72px;

  /* Z-index layers */
  --z-header:      1000;
  --z-mobile-nav:  999;
  --z-lightbox:    2000;
  --z-floating:    900;
}

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

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-body);
  font-weight: 400;
  font-size: 15px;
  line-height: 1.7;
  color: var(--texte);
  background-color: var(--noir);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}

::selection {
  background: var(--or);
  color: var(--noir);
}

::-moz-selection {
  background: var(--or);
  color: var(--noir);
}

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

a {
  color: var(--or-clair);
  text-decoration: none;
  transition: color var(--speed-fast) var(--ease);
}

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

ul, ol {
  list-style: none;
}

button {
  cursor: pointer;
  border: none;
  background: none;
  font-family: inherit;
  color: inherit;
}

/* ============================================================
   3. TYPOGRAPHY
   ============================================================ */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  font-weight: 500;
  line-height: 1.2;
  color: var(--blanc);
  letter-spacing: 0.02em;
}

h1 { font-size: clamp(36px, 5vw, 60px); margin-bottom: 24px; }
h2 { font-size: clamp(28px, 3.5vw, 42px); margin-bottom: 20px; }
h3 { font-size: clamp(20px, 2.5vw, 26px); margin-bottom: 14px; }
h4 { font-size: 20px; margin-bottom: 12px; }
h5 { font-size: 17px; margin-bottom: 10px; }
h6 { font-size: 14px; text-transform: uppercase; letter-spacing: 2px; margin-bottom: 8px; }

p {
  margin-bottom: 16px;
  color: var(--texte);
}

.gold {
  color: var(--or);
  font-family: var(--font-accent);
  font-style: italic;
  font-weight: 400;
}

/* Section headings with decorative gold line */
.section-heading {
  text-align: center;
  position: relative;
  padding-bottom: 28px;
  margin-bottom: 48px;
}

.section-heading::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 60px;
  height: 1px;
  background: var(--or);
}

.section-heading h2 {
  margin-bottom: 12px;
}

.section-heading .gold {
  font-size: clamp(16px, 2vw, 20px);
  display: block;
  margin-top: 4px;
}

/* ============================================================
   4. HEADER
   ============================================================ */
.m3dc-header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: var(--z-header);
  background: rgba(13, 13, 13, 0.4);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid rgba(201, 168, 76, 0.06);
  transition: background var(--speed) var(--ease),
              border-color var(--speed) var(--ease);
}
.m3dc-header.scrolled {
  background: rgba(13, 13, 13, 0.95);
  border-bottom-color: rgba(201, 168, 76, 0.1);
}
.m3dc-header-inner {
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 40px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--header-h);
  transition: height var(--speed) var(--ease);
}
.m3dc-header.scrolled .m3dc-header-inner {
  height: var(--header-h-scrolled);
}

.m3dc-header .logo,
.m3dc-header .m3dc-logo {
  display: flex;
  align-items: center;
}

.m3dc-header .logo img,
.m3dc-header .m3dc-logo img {
  max-height: 48px;
  width: auto;
  transition: max-height var(--speed) var(--ease);
}

.m3dc-header.scrolled .logo img,
.m3dc-header.scrolled .m3dc-logo img {
  max-height: 38px;
}

/* Desktop Nav */
.m3dc-nav {
  display: flex;
  align-items: center;
}
.m3dc-nav ul {
  display: flex;
  list-style: none;
  align-items: center;
  gap: 0;
  margin: 0;
  padding: 0;
}
.m3dc-nav ul li { list-style: none; }

.m3dc-nav a,
.m3dc-nav ul li a {
  font-family: var(--font-body);
  font-size: 11px;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 2.5px;
  color: var(--texte);
  position: relative;
  padding: 8px 16px;
  transition: color var(--speed-fast) var(--ease);
  display: block;
}

.m3dc-nav a::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 50%;
  width: 0;
  height: 1px;
  background: var(--or);
  transition: width var(--speed) var(--ease),
              left var(--speed) var(--ease);
}

.m3dc-nav a:hover,
.m3dc-nav a.active {
  color: var(--or);
}

.m3dc-nav a:hover::after,
.m3dc-nav a.active::after {
  width: 100%;
  left: 0;
}

/* Nav CTA */
.m3dc-nav .nav-cta a,
.m3dc-nav .m3dc-nav-cta a,
.m3dc-nav li.m3dc-nav-cta a {
  border: 1px solid var(--or);
  padding: 10px 24px !important;
  color: var(--or) !important;
  background: transparent;
  transition: background var(--speed) var(--ease),
              color var(--speed) var(--ease);
}

.m3dc-nav .nav-cta a::after,
.m3dc-nav .m3dc-nav-cta a::after {
  display: none;
}

.m3dc-nav .nav-cta a:hover,
.m3dc-nav .m3dc-nav-cta a:hover,
.m3dc-nav li.m3dc-nav-cta a:hover {
  background: var(--or);
  color: var(--noir) !important;
}

/* Active nav item */
.m3dc-nav li.active a {
  color: var(--or);
}

/* Hamburger */
.m3dc-hamburger {
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  width: 32px;
  height: 32px;
  cursor: pointer;
  position: relative;
  z-index: calc(var(--z-mobile-nav) + 1);
}

.m3dc-hamburger span {
  display: block;
  width: 24px;
  height: 1px;
  background: var(--or);
  transition: transform var(--speed) var(--ease),
              opacity var(--speed-fast) var(--ease);
}

.m3dc-hamburger span:nth-child(1) { transform: translateY(-6px); }
.m3dc-hamburger span:nth-child(2) { transform: translateY(0); }
.m3dc-hamburger span:nth-child(3) { transform: translateY(6px); }

.m3dc-hamburger.open span:nth-child(1) {
  transform: translateY(0) rotate(45deg);
}

.m3dc-hamburger.open span:nth-child(2) {
  opacity: 0;
}

.m3dc-hamburger.open span:nth-child(3) {
  transform: translateY(-2px) rotate(-45deg);
}

/* Mobile Nav Overlay */
.m3dc-mobile-nav {
  display: none;
  position: fixed;
  top: 0;
  right: -100%;
  width: 320px;
  height: 100vh;
  height: 100dvh;
  background: var(--warm-dark);
  z-index: var(--z-mobile-nav);
  flex-direction: column;
  padding: 120px 48px 48px;
  gap: 28px;
  transition: right var(--speed) var(--ease-out);
  border-left: 1px solid var(--card-border);
}

.m3dc-mobile-nav.open {
  right: 0;
}

.m3dc-mobile-nav a {
  font-family: var(--font-body);
  font-size: 12px;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 3px;
  color: var(--texte);
  padding: 12px 0;
  border-bottom: 1px solid var(--card-border);
  transition: color var(--speed-fast) var(--ease),
              padding-left var(--speed) var(--ease);
}

.m3dc-mobile-nav a:hover {
  color: var(--or);
  padding-left: 12px;
}

.m3dc-mobile-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.6);
  z-index: calc(var(--z-mobile-nav) - 1);
  opacity: 0;
  transition: opacity var(--speed) var(--ease);
}

.m3dc-mobile-overlay.open {
  opacity: 1;
}

/* ============================================================
   5. HERO SECTION
   ============================================================ */
.m3dc-hero {
  position: relative;
  min-height: 75vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  overflow: hidden;
}

.m3dc-hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(
    180deg,
    rgba(13, 13, 13, 0.50) 0%,
    rgba(13, 13, 13, 0.70) 60%,
    var(--noir) 100%
  );
  z-index: 2;
}

/* Hero slider */
.hero-slider,
.m3dc-hero-slider {
  position: absolute;
  inset: 0;
  z-index: 1;
}

.hero-slide,
.m3dc-slide {
  position: absolute;
  inset: 0;
  opacity: 0;
  transition: opacity 1.2s var(--ease);
  background-size: cover;
  background-position: center;
}

.hero-slide.active,
.m3dc-slide.active {
  opacity: 1;
}

.hero-slide img,
.m3dc-slide img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* Hero overlay (inline) */
.m3dc-hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(
    180deg,
    rgba(13, 13, 13, 0.50) 0%,
    rgba(13, 13, 13, 0.70) 60%,
    var(--noir) 100%
  );
  z-index: 2;
}

/* Hero page (sub-pages with static bg) */
.m3dc-hero-page {
  background-size: cover;
  background-position: center;
  min-height: 55vh;
}
.m3dc-hero-compact {
  min-height: 35vh;
  background: var(--warm-dark);
}

/* Hero dots */
.hero-dots,
.m3dc-slider-dots {
  position: absolute;
  bottom: 32px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  gap: 12px;
  z-index: 5;
}

.hero-dots button,
.m3dc-slider-dots button,
.m3dc-dot {
  width: 8px;
  height: 8px;
  border: 1px solid var(--or-muted);
  background: transparent;
  cursor: pointer;
  transition: background var(--speed-fast) var(--ease),
              border-color var(--speed-fast) var(--ease);
}

.hero-dots button.active,
.hero-dots button:hover,
.m3dc-dot.active,
.m3dc-dot:hover {
  background: var(--or);
  border-color: var(--or);
}

/* Hero content */
.hero-content,
.m3dc-hero-content {
  position: relative;
  z-index: 3;
  max-width: 800px;
  padding: 0 24px;
}

.hero-content::before,
.hero-content::after,
.m3dc-hero-content::before,
.m3dc-hero-content::after {
  content: '';
  display: block;
  width: 40px;
  height: 1px;
  background: var(--or);
  margin: 0 auto 24px;
}

.hero-content::after,
.m3dc-hero-content::after {
  margin: 24px auto 0;
}

.hero-content h1,
.m3dc-hero-content h1 {
  font-family: var(--font-heading);
  font-weight: 500;
  margin-bottom: 16px;
}

.hero-content .subtitle,
.m3dc-hero-subtitle {
  font-family: var(--font-accent);
  font-weight: 300;
  font-size: clamp(16px, 2.5vw, 22px);
  color: var(--texte-muted);
  letter-spacing: 0.04em;
}

/* Menu toggle */
.m3dc-menu-toggle {
  display: none;
  flex-direction: column;
  gap: 6px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
  z-index: 1001;
}
.m3dc-menu-toggle span {
  display: block;
  width: 26px;
  height: 1px;
  background: var(--or);
  transition: all 0.4s var(--ease);
}
.m3dc-menu-toggle.open span:nth-child(1) { transform: rotate(45deg) translate(4px, 5px); }
.m3dc-menu-toggle.open span:nth-child(2) { opacity: 0; }
.m3dc-menu-toggle.open span:nth-child(3) { transform: rotate(-45deg) translate(4px, -5px); }

/* Hero overline */
.m3dc-hero-overline {
  font-family: var(--font-body);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 3px;
  text-transform: uppercase;
  color: var(--or);
  display: block;
  margin-bottom: 16px;
}

/* Gold dot separator */
.gold-dot { color: var(--or); }

/* Card link */
.m3dc-card-link {
  display: inline-block;
  margin-top: 16px;
  font-family: var(--font-body);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--or);
  transition: color var(--speed-fast) var(--ease);
}
.m3dc-card:hover .m3dc-card-link { color: var(--or-clair); }

/* Info bar */
.m3dc-info-bar {
  background: var(--card);
  border-bottom: 1px solid var(--card-border);
  padding: 16px 48px;
}
.m3dc-info-bar-inner {
  max-width: var(--content-max);
  margin: 0 auto;
  display: flex;
  justify-content: center;
  gap: 48px;
  flex-wrap: wrap;
}
.m3dc-info-item {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-body);
  font-size: 13px;
  color: var(--texte-muted);
}
.m3dc-info-item svg { color: var(--or); flex-shrink: 0; }
.m3dc-info-item a { color: var(--texte-muted); }
.m3dc-info-item a:hover { color: var(--or); }

/* Header phone */
.m3dc-header-phone {
  color: var(--or);
  margin-right: 16px;
  transition: color var(--speed-fast) var(--ease);
}
.m3dc-header-phone:hover { color: var(--or-clair); }
.m3dc-header-right {
  display: flex;
  align-items: center;
}

/* Feature icon */
.m3dc-feature-icon {
  color: var(--or);
  font-size: 10px;
  flex-shrink: 0;
  margin-top: 3px;
}

/* Devis page layout */
.m3dc-devis-layout {
  display: grid;
  grid-template-columns: 1fr 320px;
  gap: 48px;
  align-items: start;
}
.m3dc-devis-sidebar .m3dc-sidebar-block {
  background: var(--card);
  border: 1px solid var(--card-border);
  padding: 28px;
  margin-bottom: 20px;
}
.m3dc-devis-sidebar h3 {
  font-family: var(--font-body);
  font-size: 10px;
  font-weight: 600;
  letter-spacing: 2.5px;
  text-transform: uppercase;
  color: var(--or);
  margin-bottom: 16px;
}
.m3dc-sidebar-item {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 12px;
  font-size: 14px;
}
.m3dc-sidebar-item a { color: var(--texte); }
.m3dc-sidebar-item a:hover { color: var(--or); }
.m3dc-sidebar-list {
  list-style: none;
  padding: 0;
}
.m3dc-sidebar-list li {
  padding: 6px 0;
  font-size: 14px;
  color: var(--texte-muted);
  border-bottom: 1px solid var(--card-border);
}
.m3dc-sidebar-list li::before {
  content: '✓';
  color: var(--or);
  margin-right: 10px;
}

/* Form result */
.m3dc-form-result {
  padding: 20px 24px;
  margin-bottom: 24px;
  font-size: 14px;
}
.m3dc-form-result.success {
  background: rgba(201, 168, 76, 0.08);
  border: 1px solid var(--or);
  color: var(--texte);
}
.m3dc-form-result.error {
  background: rgba(192, 57, 43, 0.08);
  border: 1px solid rgba(192, 57, 43, 0.3);
  color: #e74c3c;
}

/* Cards as links */
a.m3dc-card {
  text-decoration: none;
  color: inherit;
  display: block;
}

@media (max-width: 975px) {
  .m3dc-devis-layout { grid-template-columns: 1fr; }
  .m3dc-info-bar { padding: 12px 20px; }
  .m3dc-info-bar-inner { gap: 20px; font-size: 12px; }
}
@media (max-width: 575px) {
  .m3dc-info-bar-inner { flex-direction: column; gap: 8px; }
}

/* ============================================================
   6. BREADCRUMB
   ============================================================ */
.m3dc-breadcrumb {
  padding: 20px 48px;
  background: var(--warm-dark);
  border-bottom: 1px solid var(--card-border);
}

.m3dc-breadcrumb ul {
  display: flex;
  align-items: center;
  gap: 8px;
  max-width: var(--inner-max);
  margin: 0 auto;
}

.m3dc-breadcrumb li {
  font-family: var(--font-body);
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 2px;
  color: var(--texte-muted);
}

.m3dc-breadcrumb li + li::before {
  content: '/';
  margin-right: 8px;
  color: var(--or-muted);
}

.m3dc-breadcrumb a {
  color: var(--texte-muted);
}

.m3dc-breadcrumb a:hover {
  color: var(--or);
}

.m3dc-breadcrumb .current {
  color: var(--or-clair);
}

/* ============================================================
   7. CONTENT SECTIONS
   ============================================================ */
.m3dc-section {
  padding: var(--section-pad) 48px;
}

.m3dc-section .inner,
.m3dc-section-inner {
  max-width: var(--inner-max);
  margin: 0 auto;
  width: 100%;
}

/* Section headings */
.m3dc-section h2,
.m3dc-section-inner > h2 {
  font-family: var(--font-heading);
  font-size: clamp(28px, 3.5vw, 40px);
  font-weight: 500;
  text-align: center;
  margin-bottom: 40px;
  color: var(--blanc);
}
.m3dc-section h2 em,
.m3dc-section-inner > h2 em {
  color: var(--or);
  font-style: italic;
}
.m3dc-section h2::after {
  content: '';
  display: block;
  width: 60px;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--or), transparent);
  margin: 20px auto 0;
}

.m3dc-section.alt {
  background: var(--warm-dark);
}

/* Intro text */
.m3dc-intro {
  font-family: var(--font-accent);
  font-size: 22px;
  font-weight: 400;
  line-height: 1.7;
  text-align: center;
  max-width: 800px;
  margin: 0 auto 48px;
  color: var(--texte);
  letter-spacing: 0.02em;
}

/* Gold decorative divider */
.gold-divider {
  width: 60px;
  height: 1px;
  background: var(--or);
  margin: 48px auto;
}

/* ============================================================
   8. CARDS GRID
   ============================================================ */
.m3dc-cards,
.m3dc-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--gap);
}

.m3dc-card {
  background: var(--card);
  border: 1px solid var(--card-border);
  padding: 36px 32px;
  position: relative;
  transition: transform var(--speed) var(--ease),
              box-shadow var(--speed) var(--ease),
              border-color var(--speed) var(--ease);
}

.m3dc-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 2px;
  background: var(--or);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--speed) var(--ease);
}

.m3dc-card:hover {
  transform: translateY(-6px);
  box-shadow: 0 20px 48px rgba(0, 0, 0, 0.35);
  border-color: rgba(201, 168, 76, 0.25);
}

.m3dc-card:hover::before {
  transform: scaleX(1);
}

.m3dc-card h3 {
  font-family: var(--font-heading);
  font-size: 20px;
  margin-bottom: 12px;
}

.m3dc-card p {
  font-family: var(--font-body);
  font-size: 14px;
  color: var(--texte-muted);
  line-height: 1.7;
}

.m3dc-card .card-icon {
  width: 40px;
  height: 40px;
  margin-bottom: 20px;
  color: var(--or);
}

.m3dc-card img {
  width: 100%;
  height: 220px;
  object-fit: cover;
  margin-bottom: 24px;
}

/* ============================================================
   9. FEATURE ITEMS
   ============================================================ */
.m3dc-features {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 16px;
  margin-top: 32px;
}

.m3dc-feature,
.m3dc-feature-item {
  display: flex;
  align-items: flex-start;
  gap: 24px;
  padding: 28px 32px;
  border-left: 2px solid var(--or);
  background: var(--card);
  transition: transform var(--speed) var(--ease),
              background var(--speed) var(--ease);
}

.m3dc-feature:hover,
.m3dc-feature-item:hover {
  transform: translateX(8px);
  background: rgba(26, 23, 20, 0.8);
}

.m3dc-feature .feature-number {
  font-family: var(--font-heading);
  font-size: 32px;
  color: var(--or);
  line-height: 1;
  flex-shrink: 0;
}

.m3dc-feature h4 {
  font-family: var(--font-heading);
  font-size: 18px;
  margin-bottom: 8px;
}

.m3dc-feature p {
  font-size: 14px;
  color: var(--texte-muted);
}

/* ============================================================
   10. GALLERY
   ============================================================ */
/* .m3dc-gallery is a section wrapper, not a direct grid */
/* Grid layout is on .m3dc-gallery-grid inside it */

.m3dc-gallery .span-col-2 {
  grid-column: span 2;
}

.m3dc-gallery-item {
  position: relative;
  overflow: hidden;
  cursor: pointer;
}

.m3dc-gallery-item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: brightness(0.85);
  transition: filter var(--speed) var(--ease),
              transform 0.6s var(--ease);
}

.m3dc-gallery-item:hover img {
  filter: brightness(1);
  transform: scale(1.05);
}

.m3dc-gallery-item .caption {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  padding: 20px 24px;
  background: linear-gradient(transparent, rgba(13, 13, 13, 0.85));
  transform: translateY(100%);
  transition: transform var(--speed) var(--ease);
}

.m3dc-gallery-item:hover .caption {
  transform: translateY(0);
}

.m3dc-gallery-item .caption h4 {
  font-family: var(--font-heading);
  font-size: 16px;
  margin-bottom: 4px;
}

.m3dc-gallery-item .caption p {
  font-family: var(--font-accent);
  font-size: 14px;
  color: var(--texte-muted);
  font-style: italic;
}

/* Lightbox */
.m3dc-lightbox {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.92);
  z-index: var(--z-lightbox);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--speed) var(--ease);
}

.m3dc-lightbox.active {
  opacity: 1;
  pointer-events: auto;
}

.m3dc-lightbox img {
  max-width: 90vw;
  max-height: 85vh;
  object-fit: contain;
}

.m3dc-lightbox .lb-close,
.m3dc-lightbox .lb-prev,
.m3dc-lightbox .lb-next {
  position: absolute;
  background: none;
  border: 1px solid var(--or-muted);
  color: var(--or);
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  transition: background var(--speed-fast) var(--ease),
              border-color var(--speed-fast) var(--ease);
}

.m3dc-lightbox .lb-close:hover,
.m3dc-lightbox .lb-prev:hover,
.m3dc-lightbox .lb-next:hover {
  background: var(--or);
  color: var(--noir);
  border-color: var(--or);
}

.m3dc-lightbox .lb-close {
  top: 24px;
  right: 24px;
}

.m3dc-lightbox .lb-prev {
  left: 24px;
  top: 50%;
  transform: translateY(-50%);
}

.m3dc-lightbox .lb-next {
  right: 24px;
  top: 50%;
  transform: translateY(-50%);
}

/* ============================================================
   11. CTA BANNER
   ============================================================ */
.m3dc-cta-banner {
  background: var(--warm-dark);
  padding: 80px 48px;
  text-align: center;
  border-top: 1px solid var(--card-border);
  border-bottom: 1px solid var(--card-border);
}

.m3dc-cta-banner h2 {
  font-family: var(--font-heading);
  margin-bottom: 12px;
}

.m3dc-cta-banner .cta-desc {
  font-family: var(--font-accent);
  font-size: 18px;
  color: var(--texte-muted);
  font-style: italic;
  max-width: 600px;
  margin: 0 auto 32px;
}

.m3dc-cta-banner .gold-divider {
  margin: 0 auto 32px;
}

/* ============================================================
   12. BUTTONS
   ============================================================ */
.m3dc-btn {
  display: inline-block;
  font-family: var(--font-body);
  font-size: 11px;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 3px;
  padding: 14px 36px;
  border: 1px solid var(--or);
  color: var(--or);
  background: transparent;
  position: relative;
  overflow: hidden;
  cursor: pointer;
  transition: color var(--speed) var(--ease);
  z-index: 1;
}

.m3dc-btn::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: var(--or);
  transform: translateX(-101%);
  transition: transform var(--speed) var(--ease);
  z-index: -1;
}

.m3dc-btn:hover {
  color: var(--noir);
}

.m3dc-btn:hover::before {
  transform: translateX(0);
}

/* Filled variant */
.m3dc-btn-filled {
  background: var(--or);
  color: var(--noir);
  border-color: var(--or);
}

.m3dc-btn-filled::before {
  background: var(--noir);
  transform: translateX(-101%);
}

.m3dc-btn-filled:hover {
  color: var(--or);
}

.m3dc-btn-filled:hover::before {
  transform: translateX(0);
}

/* Small button variant */
.m3dc-btn-sm {
  padding: 10px 24px;
  font-size: 10px;
  letter-spacing: 2.5px;
}

/* ============================================================
   13. TRUST / STATS BANNER
   ============================================================ */
.m3dc-stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 32px;
  padding: 64px 48px;
  background: var(--warm-dark);
  border-top: 1px solid var(--card-border);
  border-bottom: 1px solid var(--card-border);
  text-align: center;
}

.m3dc-stat .number {
  font-family: var(--font-heading);
  font-size: 56px;
  font-weight: 500;
  color: var(--or);
  line-height: 1;
  margin-bottom: 8px;
}

.m3dc-stat .label {
  font-family: var(--font-body);
  font-size: 10px;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 3px;
  color: var(--texte-muted);
}

/* ============================================================
   14. TESTIMONIALS
   ============================================================ */
.m3dc-testimonials {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: var(--gap);
}

.m3dc-testimonial {
  background: var(--card);
  border: 1px solid var(--card-border);
  padding: 36px 32px;
}

.m3dc-testimonial .stars {
  color: var(--or);
  font-size: 14px;
  letter-spacing: 4px;
  margin-bottom: 20px;
}

.m3dc-testimonial blockquote {
  font-family: var(--font-accent);
  font-style: italic;
  font-size: 17px;
  line-height: 1.7;
  color: var(--texte);
  margin-bottom: 24px;
  padding-left: 20px;
  border-left: 1px solid var(--or-muted);
}

.m3dc-testimonial .author {
  font-family: var(--font-body);
  font-size: 12px;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 2px;
  color: var(--texte-muted);
}

.m3dc-testimonial .author span {
  display: block;
  font-weight: 400;
  text-transform: none;
  letter-spacing: 0;
  font-size: 12px;
  margin-top: 4px;
  color: var(--texte-faint);
}

/* ============================================================
   15. FORM STYLES
   ============================================================ */
.m3dc-form {
  max-width: 700px;
  margin: 0 auto;
}

.m3dc-form .form-group {
  margin-bottom: 28px;
}

.m3dc-form .form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
}

.m3dc-form label {
  display: block;
  font-family: var(--font-body);
  font-size: 10px;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 2px;
  color: var(--texte-muted);
  margin-bottom: 10px;
}

.m3dc-form input[type="text"],
.m3dc-form input[type="email"],
.m3dc-form input[type="tel"],
.m3dc-form input[type="number"],
.m3dc-form textarea,
.m3dc-form select {
  width: 100%;
  padding: 14px 16px;
  background: rgba(26, 23, 20, 0.6);
  border: 1px solid var(--card-border);
  border-radius: 0;
  color: var(--texte);
  font-family: var(--font-body);
  font-size: 14px;
  transition: border-color var(--speed-fast) var(--ease),
              background var(--speed-fast) var(--ease);
  -webkit-appearance: none;
  appearance: none;
}

.m3dc-form input:focus,
.m3dc-form textarea:focus,
.m3dc-form select:focus {
  outline: none;
  border-color: var(--or);
  background: rgba(26, 23, 20, 0.9);
}

.m3dc-form textarea {
  min-height: 140px;
  resize: vertical;
}

.m3dc-form select {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8'%3E%3Cpath d='M1 1l5 5 5-5' stroke='%23C9A84C' fill='none' stroke-width='1.5'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 16px center;
  padding-right: 40px;
}

/* Custom Radio */
.m3dc-form .radio-group {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
}

.m3dc-form .radio-item {
  position: relative;
  display: flex;
  align-items: center;
  gap: 10px;
  cursor: pointer;
}

.m3dc-form .radio-item input[type="radio"] {
  position: absolute;
  opacity: 0;
  width: 0;
  height: 0;
}

.m3dc-form .radio-mark {
  width: 18px;
  height: 18px;
  border: 1px solid var(--card-border);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  transition: border-color var(--speed-fast) var(--ease);
}

.m3dc-form .radio-item input[type="radio"]:checked + .radio-mark {
  border-color: var(--or);
}

.m3dc-form .radio-item input[type="radio"]:checked + .radio-mark::after {
  content: '';
  width: 8px;
  height: 8px;
  background: var(--or);
}

.m3dc-form .radio-label {
  font-size: 14px;
  color: var(--texte);
}

/* Custom Checkbox */
.m3dc-form .checkbox-item {
  position: relative;
  display: flex;
  align-items: center;
  gap: 10px;
  cursor: pointer;
}

.m3dc-form .checkbox-item input[type="checkbox"] {
  position: absolute;
  opacity: 0;
  width: 0;
  height: 0;
}

.m3dc-form .checkbox-mark {
  width: 18px;
  height: 18px;
  border: 1px solid var(--card-border);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  transition: border-color var(--speed-fast) var(--ease),
              background var(--speed-fast) var(--ease);
}

.m3dc-form .checkbox-item input[type="checkbox"]:checked + .checkbox-mark {
  border-color: var(--or);
  background: var(--or);
}

.m3dc-form .checkbox-item input[type="checkbox"]:checked + .checkbox-mark::after {
  content: '';
  width: 10px;
  height: 6px;
  border-left: 1.5px solid var(--noir);
  border-bottom: 1.5px solid var(--noir);
  transform: rotate(-45deg) translateY(-1px);
}

/* File Upload */
.m3dc-form .file-upload {
  border: 1px dashed var(--card-border);
  padding: 32px;
  text-align: center;
  cursor: pointer;
  transition: border-color var(--speed-fast) var(--ease),
              background var(--speed-fast) var(--ease);
}

.m3dc-form .file-upload:hover {
  border-color: var(--or);
  background: rgba(201, 168, 76, 0.04);
}

.m3dc-form .file-upload input[type="file"] {
  display: none;
}

.m3dc-form .file-upload .upload-label {
  font-family: var(--font-body);
  font-size: 13px;
  color: var(--texte-muted);
}

.m3dc-form .file-upload .upload-label span {
  color: var(--or);
  text-decoration: underline;
}

/* Submit */
.m3dc-form button[type="submit"] {
  display: inline-block;
  font-family: var(--font-body);
  font-size: 11px;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 3px;
  padding: 14px 36px;
  border: 1px solid var(--or);
  color: var(--or);
  background: transparent;
  position: relative;
  overflow: hidden;
  cursor: pointer;
  transition: color var(--speed) var(--ease);
  z-index: 1;
}

.m3dc-form button[type="submit"]::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: var(--or);
  transform: translateX(-101%);
  transition: transform var(--speed) var(--ease);
  z-index: -1;
}

.m3dc-form button[type="submit"]:hover {
  color: var(--noir);
}

.m3dc-form button[type="submit"]:hover::before {
  transform: translateX(0);
}

/* ============================================================
   16. FLOATING CTA
   ============================================================ */
.m3dc-floating-cta {
  position: fixed;
  bottom: 32px;
  right: 32px;
  z-index: var(--z-floating);
  background: var(--or);
  color: var(--noir);
  font-family: var(--font-body);
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 2px;
  padding: 14px 28px;
  border: none;
  cursor: pointer;
  box-shadow: 0 8px 32px rgba(201, 168, 76, 0.25);
  transition: transform var(--speed-fast) var(--ease),
              box-shadow var(--speed-fast) var(--ease),
              background var(--speed-fast) var(--ease);
}

.m3dc-floating-cta:hover {
  transform: translateY(-3px);
  box-shadow: 0 12px 40px rgba(201, 168, 76, 0.35);
  background: var(--or-clair);
}

/* ============================================================
   17. FOOTER
   ============================================================ */
.m3dc-footer {
  background: var(--noir);
  border-top: 1px solid var(--or);
  padding: 64px 48px 0;
}

.m3dc-footer .footer-grid {
  display: grid;
  grid-template-columns: 1.2fr 1fr 1fr;
  gap: 48px;
  max-width: var(--inner-max);
  margin: 0 auto;
  padding-bottom: 48px;
}

/* Footer - Logo & tagline column */
.m3dc-footer .footer-brand .logo img {
  max-height: 42px;
  margin-bottom: 20px;
}

.m3dc-footer .footer-brand .tagline {
  font-family: var(--font-accent);
  font-style: italic;
  font-size: 15px;
  color: var(--texte-muted);
  margin-bottom: 24px;
  line-height: 1.6;
}

.m3dc-footer .social-links {
  display: flex;
  gap: 16px;
}

.m3dc-footer .social-links a {
  width: 36px;
  height: 36px;
  border: 1px solid var(--card-border);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--texte-muted);
  font-size: 14px;
  transition: border-color var(--speed-fast) var(--ease),
              color var(--speed-fast) var(--ease),
              background var(--speed-fast) var(--ease);
}

.m3dc-footer .social-links a:hover {
  border-color: var(--or);
  color: var(--or);
  background: rgba(201, 168, 76, 0.08);
}

/* Footer - Services column */
.m3dc-footer .footer-col h5 {
  font-family: var(--font-body);
  font-size: 10px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 3px;
  color: var(--or);
  margin-bottom: 24px;
}

.m3dc-footer .footer-col ul {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.m3dc-footer .footer-col a {
  font-size: 13px;
  color: var(--texte-muted);
  transition: color var(--speed-fast) var(--ease),
              padding-left var(--speed) var(--ease);
}

.m3dc-footer .footer-col a:hover {
  color: var(--or-clair);
  padding-left: 6px;
}

/* Footer - Contact column */
.m3dc-footer .footer-contact p {
  font-size: 13px;
  color: var(--texte-muted);
  margin-bottom: 8px;
  line-height: 1.6;
}

.m3dc-footer .footer-contact a {
  color: var(--or-clair);
}

/* Footer bottom */
.m3dc-footer .footer-bottom {
  border-top: 1px solid var(--or-muted);
  padding: 24px 0;
  max-width: var(--inner-max);
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.m3dc-footer .footer-bottom p {
  font-size: 11px;
  color: var(--texte-faint);
  margin-bottom: 0;
}

.m3dc-footer .footer-bottom .legal-links {
  display: flex;
  gap: 24px;
}

.m3dc-footer .footer-bottom .legal-links a {
  font-size: 11px;
  color: var(--texte-faint);
}

.m3dc-footer .footer-bottom .legal-links a:hover {
  color: var(--or);
}

/* ============================================================
   HTML CLASS ALIASES — mapping HTML names to CSS definitions
   ============================================================ */

/* Gallery — Checkerboard (damier) + B&W → color on hover */
.m3dc-gallery {
  padding: var(--section-pad) 48px;
  background: var(--noir);
}
.m3dc-gallery > .m3dc-section-inner > h2 {
  text-align: center;
  margin-bottom: 48px;
}
.m3dc-gallery-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  grid-auto-rows: 280px;
  gap: 4px;
}
/* Checkerboard: alternate large/small items */
.m3dc-gallery-grid .m3dc-gallery-item:nth-child(1) { grid-column: span 2; grid-row: span 2; }
.m3dc-gallery-grid .m3dc-gallery-item:nth-child(6) { grid-column: span 2; grid-row: span 2; }

.m3dc-gallery-item {
  position: relative;
  overflow: hidden;
  cursor: pointer;
}
.m3dc-gallery-item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: grayscale(100%) brightness(0.8) contrast(1.1);
  transition: filter 0.6s var(--ease), transform 0.6s var(--ease);
}
.m3dc-gallery-item:hover img {
  filter: grayscale(0%) brightness(1) contrast(1.05);
  transform: scale(1.05);
}
.m3dc-gallery-item figcaption {
  position: absolute;
  bottom: 0; left: 0; right: 0;
  padding: 20px;
  background: linear-gradient(0deg, rgba(13,13,13,0.8) 0%, transparent 100%);
  color: var(--blanc);
  font-family: var(--font-body);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 2px;
  text-transform: uppercase;
  transform: translateY(100%);
  opacity: 0;
  transition: transform 0.5s var(--ease), opacity 0.5s var(--ease);
}
.m3dc-gallery-item:hover figcaption {
  transform: translateY(0);
  opacity: 1;
}

@media (max-width: 975px) {
  .m3dc-gallery-grid { grid-template-columns: repeat(2, 1fr); grid-auto-rows: 220px; }
  .m3dc-gallery { padding: 64px 24px; }
}
@media (max-width: 575px) {
  .m3dc-gallery-grid { grid-template-columns: 1fr; grid-auto-rows: 250px; }
  .m3dc-gallery-grid .m3dc-gallery-item:nth-child(1),
  .m3dc-gallery-grid .m3dc-gallery-item:nth-child(6) { grid-column: span 1; grid-row: span 1; }
}

/* Footer aliases */
.m3dc-footer-inner { max-width: var(--inner-max); margin: 0 auto; }
.m3dc-footer-grid {
  display: grid;
  grid-template-columns: 1.2fr 1fr 1fr;
  gap: 48px;
  padding-bottom: 48px;
}
.m3dc-footer-logo { max-height: 42px; width: auto; margin-bottom: 20px; filter: brightness(1.1); object-fit: contain; }
.m3dc-footer-tagline {
  font-family: var(--font-accent);
  font-style: italic;
  font-size: 15px;
  color: var(--texte-muted);
  margin-bottom: 24px;
}
.m3dc-footer-social { display: flex; gap: 16px; }
.m3dc-footer-social a {
  font-family: var(--font-body);
  font-size: 10px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 2px;
  color: var(--or);
  opacity: 0.7;
  transition: opacity 0.3s;
}
.m3dc-footer-social a:hover { opacity: 1; }
.m3dc-footer-col h3,
.m3dc-footer h3 {
  font-family: var(--font-body);
  font-size: 10px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 3px;
  color: var(--or);
  margin-bottom: 20px;
}
.m3dc-footer-col ul { list-style: none; padding: 0; display: flex; flex-direction: column; gap: 10px; }
.m3dc-footer-col a { font-size: 13px; color: var(--texte-muted); transition: color 0.3s, padding-left 0.3s; }
.m3dc-footer-col a:hover { color: var(--or-clair); padding-left: 6px; }
.m3dc-footer-col p { font-size: 13px; color: var(--texte-muted); line-height: 1.6; margin-bottom: 8px; }
.m3dc-footer-hours { color: var(--texte-faint) !important; font-size: 12px !important; }
.m3dc-footer-bottom {
  border-top: 1px solid var(--or-muted);
  padding: 24px 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
}
.m3dc-footer-bottom p { font-size: 11px; color: var(--texte-faint); margin: 0; }
.m3dc-footer-legal { display: flex; gap: 24px; }
.m3dc-footer-legal a { font-size: 11px; color: var(--texte-faint); transition: color 0.3s; }
.m3dc-footer-legal a:hover { color: var(--or); }

/* Footer map */
.m3dc-footer-map {
  margin: 32px 0 0;
  border-top: 1px solid var(--card-border);
  padding-top: 32px;
}
.m3dc-footer-map iframe { display: block; width: 100%; }

/* Testimonials aliases */
.m3dc-testimonials-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--gap);
}
.m3dc-testimonial {
  background: var(--card);
  border: 1px solid var(--card-border);
  padding: 36px 32px;
  transition: border-color 0.4s var(--ease), box-shadow 0.4s var(--ease);
}
.m3dc-testimonial:hover {
  border-color: rgba(201,168,76,0.2);
  box-shadow: 0 12px 32px rgba(0,0,0,0.3);
}
.m3dc-testimonial-stars { color: var(--or); font-size: 16px; letter-spacing: 3px; margin-bottom: 16px; }
.m3dc-testimonial blockquote {
  font-family: var(--font-accent);
  font-style: italic;
  font-size: 16px;
  line-height: 1.7;
  color: var(--texte-muted);
  margin: 0 0 20px 0;
  padding: 0;
  border: none;
}
.m3dc-testimonial cite {
  font-family: var(--font-body);
  font-style: normal;
  font-size: 13px;
  color: var(--texte);
}
.m3dc-testimonial cite span { color: var(--texte-faint); font-size: 12px; }

/* Trust aliases */
.m3dc-trust {
  background: var(--card);
  padding: 64px 48px;
  border-top: 1px solid var(--card-border);
  border-bottom: 1px solid var(--card-border);
}
.m3dc-trust-inner {
  max-width: var(--inner-max);
  margin: 0 auto;
  display: flex;
  justify-content: space-around;
  flex-wrap: wrap;
  gap: 40px;
}
.m3dc-trust-item { text-align: center; flex: 1 1 180px; }
.m3dc-trust-number {
  font-family: var(--font-heading);
  font-size: 56px;
  font-weight: 400;
  color: var(--or);
  line-height: 1;
  display: inline;
}
.m3dc-trust-suffix {
  font-family: var(--font-heading);
  font-size: 24px;
  color: var(--or);
  margin-left: 2px;
}
.m3dc-trust-label {
  display: block;
  font-family: var(--font-body);
  font-size: 10px;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 3px;
  color: var(--texte-muted);
  margin-top: 12px;
}

/* CTA banner aliases */
.m3dc-cta-banner p {
  font-family: var(--font-accent);
  font-size: 18px;
  color: var(--texte-muted);
  margin-bottom: 32px;
}

/* data-reveal scroll animations (used in HTML) */
[data-reveal] {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.7s var(--ease), transform 0.7s var(--ease);
}
[data-reveal].revealed {
  opacity: 1;
  transform: translateY(0);
}

/* Floating CTA */
.m3dc-floating-cta {
  position: fixed;
  bottom: 28px;
  right: 28px;
  z-index: 999;
  opacity: 0;
  transform: translateY(20px);
  transition: all 0.5s var(--ease);
  pointer-events: none;
}
.m3dc-floating-btn {
  display: inline-flex;
  align-items: center;
  padding: 14px 28px;
  background: var(--or);
  color: var(--noir) !important;
  font-family: var(--font-body);
  font-weight: 600;
  font-size: 10px;
  letter-spacing: 2.5px;
  text-transform: uppercase;
  text-decoration: none;
  box-shadow: 0 4px 24px rgba(201,168,76,0.3);
  transition: all 0.4s var(--ease);
}
.m3dc-floating-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 32px rgba(201,168,76,0.4);
  color: var(--noir) !important;
}

/* Responsive aliases */
@media (max-width: 975px) {
  .m3dc-footer-grid { grid-template-columns: 1fr; gap: 32px; }
  .m3dc-footer { padding: 48px 24px 0; }
  .m3dc-footer-bottom { flex-direction: column; text-align: center; }
  .m3dc-trust { padding: 48px 24px; }
  .m3dc-trust-number { font-size: 42px; }
  .m3dc-gallery { padding: 64px 24px; }
  .m3dc-gallery-grid { grid-template-columns: repeat(2, 1fr); }
  .m3dc-testimonials-grid { grid-template-columns: 1fr; }
  .m3dc-floating-cta { bottom: 16px; right: 16px; left: 16px; }
  .m3dc-floating-btn { width: 100%; justify-content: center; }
}
@media (max-width: 575px) {
  .m3dc-gallery-grid { grid-template-columns: 1fr; }
}

/* ============================================================
   18. SCROLL REVEAL ANIMATIONS
   ============================================================ */
.lux-reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.7s var(--ease),
              transform 0.7s var(--ease);
}

.lux-reveal.revealed {
  opacity: 1;
  transform: translateY(0);
}

/* Staggered children */
.lux-reveal-stagger > .lux-reveal:nth-child(1) { transition-delay: 0s; }
.lux-reveal-stagger > .lux-reveal:nth-child(2) { transition-delay: 0.1s; }
.lux-reveal-stagger > .lux-reveal:nth-child(3) { transition-delay: 0.2s; }
.lux-reveal-stagger > .lux-reveal:nth-child(4) { transition-delay: 0.3s; }
.lux-reveal-stagger > .lux-reveal:nth-child(5) { transition-delay: 0.4s; }
.lux-reveal-stagger > .lux-reveal:nth-child(6) { transition-delay: 0.5s; }
.lux-reveal-stagger > .lux-reveal:nth-child(7) { transition-delay: 0.6s; }
.lux-reveal-stagger > .lux-reveal:nth-child(8) { transition-delay: 0.7s; }

/* Fade variants */
.lux-reveal-left {
  opacity: 0;
  transform: translateX(-30px);
  transition: opacity 0.7s var(--ease),
              transform 0.7s var(--ease);
}

.lux-reveal-right {
  opacity: 0;
  transform: translateX(30px);
  transition: opacity 0.7s var(--ease),
              transform 0.7s var(--ease);
}

.lux-reveal-left.revealed,
.lux-reveal-right.revealed {
  opacity: 1;
  transform: translateX(0);
}

/* ============================================================
   19. UTILITY CLASSES
   ============================================================ */
.text-center { text-align: center; }
.text-left   { text-align: left; }
.text-right  { text-align: right; }
.text-muted  { color: var(--texte-muted); }
.text-gold   { color: var(--or); }
.text-faint  { color: var(--texte-faint); }

.mt-0  { margin-top: 0; }
.mt-1  { margin-top: 16px; }
.mt-2  { margin-top: 32px; }
.mt-3  { margin-top: 48px; }
.mb-0  { margin-bottom: 0; }
.mb-1  { margin-bottom: 16px; }
.mb-2  { margin-bottom: 32px; }
.mb-3  { margin-bottom: 48px; }

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

/* ============================================================
   20. RESPONSIVE — max-width 975px
   ============================================================ */
@media (max-width: 975px) {

  /* Header */
  .m3dc-nav {
    position: fixed;
    top: 0; right: -100%;
    width: 320px;
    height: 100vh;
    background: var(--noir);
    padding: 120px 32px 32px;
    transition: right 0.5s var(--ease);
    box-shadow: -8px 0 40px rgba(0,0,0,.5);
    border-left: 1px solid var(--card-border);
    z-index: 1000;
    display: flex;
    flex-direction: column;
  }
  .m3dc-nav.open { right: 0; }
  .m3dc-nav ul { flex-direction: column; gap: 0; }
  .m3dc-nav ul li a { padding: 16px 0; font-size: 12px; letter-spacing: 3px; border-bottom: 1px solid var(--card-border); }
  .m3dc-nav ul li a::after { display: none; }
  .m3dc-nav li.m3dc-nav-cta { margin-top: 24px; }
  .m3dc-nav li.m3dc-nav-cta a { text-align: center; }
  .m3dc-menu-toggle { display: flex !important; }

  .m3dc-header {
    padding: 0 24px;
  }

  /* Hero */
  .m3dc-hero {
    min-height: 65vh;
  }

  /* Sections */
  .m3dc-section {
    padding: 64px 24px;
  }

  .m3dc-intro {
    font-size: 19px;
  }

  /* Cards */
  .m3dc-cards {
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 20px;
  }

  /* Gallery */
  .m3dc-gallery {
    grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
    grid-auto-rows: 200px;
  }

  .m3dc-gallery .span-col-2 {
    grid-column: span 1;
  }

  /* Stats */
  .m3dc-stats {
    grid-template-columns: repeat(2, 1fr);
    padding: 48px 24px;
  }

  .m3dc-stat .number {
    font-size: 42px;
  }

  /* Testimonials */
  .m3dc-testimonials {
    grid-template-columns: 1fr;
  }

  /* Form */
  .m3dc-form .form-row {
    grid-template-columns: 1fr;
    gap: 0;
  }

  /* Footer */
  .m3dc-footer {
    padding: 48px 24px 0;
  }

  .m3dc-footer .footer-grid {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  .m3dc-footer .footer-bottom {
    flex-direction: column;
    gap: 16px;
    text-align: center;
  }

  /* CTA Banner */
  .m3dc-cta-banner {
    padding: 56px 24px;
  }

  /* Breadcrumb */
  .m3dc-breadcrumb {
    padding: 16px 24px;
  }
}

/* ============================================================
   21. RESPONSIVE — max-width 575px
   ============================================================ */
@media (max-width: 575px) {

  :root {
    --section-pad: 48px;
  }

  .m3dc-header {
    padding: 0 16px;
    height: 64px;
  }

  .m3dc-header.scrolled {
    height: 56px;
  }

  .m3dc-header .logo img,
.m3dc-header .m3dc-logo img {
    max-height: 36px;
  }

  .m3dc-mobile-nav {
    width: 100%;
    padding: 100px 32px 32px;
  }

  /* Hero */
  .m3dc-hero {
    min-height: 55vh;
  }

  .hero-content h1 {
    font-size: 28px;
  }

  .hero-content .subtitle,
.m3dc-hero-subtitle {
    font-size: 15px;
  }

  /* Sections */
  .m3dc-section {
    padding: 48px 16px;
  }

  .m3dc-intro {
    font-size: 17px;
  }

  .section-heading {
    margin-bottom: 32px;
    padding-bottom: 20px;
  }

  /* Cards */
  .m3dc-cards {
    grid-template-columns: 1fr;
    gap: 16px;
  }

  .m3dc-card {
    padding: 28px 24px;
  }

  /* Features */
  .m3dc-feature {
    flex-direction: column;
    gap: 12px;
    padding: 24px;
  }

  /* Gallery */
  .m3dc-gallery {
    grid-template-columns: 1fr;
    grid-auto-rows: 200px;
  }

  .m3dc-gallery .span-2 {
    grid-row: span 1;
  }

  /* Stats */
  .m3dc-stats {
    grid-template-columns: 1fr;
    gap: 24px;
    padding: 40px 16px;
  }

  .m3dc-stat .number {
    font-size: 36px;
  }

  /* Buttons */
  .m3dc-btn {
    padding: 12px 28px;
    font-size: 10px;
  }

  /* CTA Banner */
  .m3dc-cta-banner {
    padding: 40px 16px;
  }

  .m3dc-cta-banner h2 {
    font-size: 24px;
  }

  /* Floating CTA */
  .m3dc-floating-cta {
    bottom: 16px;
    right: 16px;
    padding: 12px 20px;
    font-size: 10px;
  }

  /* Footer */
  .m3dc-footer {
    padding: 40px 16px 0;
  }

  .m3dc-footer .footer-bottom .legal-links {
    flex-direction: column;
    gap: 8px;
  }

  /* Lightbox */
  .m3dc-lightbox .lb-close,
  .m3dc-lightbox .lb-prev,
  .m3dc-lightbox .lb-next {
    width: 40px;
    height: 40px;
    font-size: 16px;
  }

  .m3dc-lightbox .lb-close {
    top: 16px;
    right: 16px;
  }

  .m3dc-lightbox .lb-prev {
    left: 8px;
  }

  .m3dc-lightbox .lb-next {
    right: 8px;
  }

  /* Breadcrumb */
  .m3dc-breadcrumb {
    padding: 12px 16px;
    overflow-x: auto;
  }

  .m3dc-breadcrumb ul {
    white-space: nowrap;
  }
}

/* ============================================================
   22. PRINT STYLES
   ============================================================ */
@media print {
  .m3dc-header,
  .m3dc-hamburger,
  .m3dc-mobile-nav,
  .m3dc-mobile-overlay,
  .m3dc-floating-cta,
  .m3dc-lightbox,
  .hero-dots {
    display: none !important;
  }

  body {
    background: #fff;
    color: #111;
  }

  .m3dc-section {
    padding: 32px 0;
  }

  .m3dc-card,
  .m3dc-testimonial {
    border: 1px solid #ccc;
    break-inside: avoid;
  }
}