/* ==========================================================================
   GROUPE MN — Immobilier de prestige
   Charte graphique : Noir profond & Or
   ========================================================================== */

:root {
  --noir: #0a0a0a;
  --noir-doux: #141414;
  --noir-carte: #1a1a1a;
  --or: #c9a961;
  --or-clair: #e8d5a3;
  --or-fonce: #a68845;
  --creme: #f5f3ee;
  --blanc: #ffffff;
  --gris-texte: #9a9a9a;
  --gris-clair: #d4d4d4;
  --gris-fonce: #2a2a2a;
  --border-or: rgba(201, 169, 97, 0.3);

  --ff-serif: 'Playfair Display', 'Times New Roman', serif;
  --ff-serif-sous: 'Cormorant Garamond', Georgia, serif;
  --ff-sans: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;

  --transition: 0.4s cubic-bezier(0.22, 1, 0.36, 1);
  --transition-lent: 0.8s cubic-bezier(0.22, 1, 0.36, 1);

  --max-width: 1400px;
  --padding-section: 120px 40px;
}

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

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

body {
  font-family: var(--ff-sans);
  color: var(--creme);
  background-color: var(--noir);
  line-height: 1.6;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

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

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

/* ========== TYPOGRAPHIE ========== */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--ff-serif);
  font-weight: 400;
  line-height: 1.15;
  letter-spacing: -0.01em;
  color: var(--creme);
}

h1 { font-size: clamp(3rem, 7vw, 6rem); }
h2 { font-size: clamp(2.25rem, 4.5vw, 3.75rem); }
h3 { font-size: clamp(1.5rem, 2.5vw, 2.25rem); }
h4 { font-size: 1.35rem; }

p {
  font-size: 1rem;
  color: var(--gris-clair);
  max-width: 65ch;
}

.kicker {
  font-family: var(--ff-sans);
  font-size: 0.75rem;
  letter-spacing: 0.3em;
  text-transform: uppercase;
  color: var(--or);
  font-weight: 500;
  margin-bottom: 1.25rem;
  display: inline-block;
}

.lede {
  font-family: var(--ff-serif-sous);
  font-size: 1.5rem;
  line-height: 1.5;
  color: var(--creme);
  font-weight: 300;
  font-style: italic;
}

/* ========== CONTAINER & SECTIONS ========== */
.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 40px;
}

section {
  padding: var(--padding-section);
  position: relative;
}

.section-header {
  text-align: center;
  margin-bottom: 80px;
  max-width: 800px;
  margin-left: auto;
  margin-right: auto;
}

.section-header h2 {
  margin-bottom: 24px;
}

.section-header p {
  margin: 0 auto;
  font-size: 1.1rem;
}

/* ========== NAVIGATION ========== */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  padding: 24px 40px;
  background: transparent;
  transition: background var(--transition), padding var(--transition), border-color var(--transition);
  border-bottom: 1px solid transparent;
}

.nav.scrolled {
  background: rgba(10, 10, 10, 0.92);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  padding: 16px 40px;
  border-bottom-color: var(--border-or);
}

.nav-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-logo {
  display: flex;
  flex-direction: column;
  line-height: 1;
}

.nav-logo .logo-main {
  font-family: var(--ff-serif);
  font-size: 1.75rem;
  color: var(--creme);
  letter-spacing: 0.02em;
}

.nav-logo .logo-main span {
  color: var(--or);
}

.nav-logo .logo-sub {
  font-size: 0.65rem;
  letter-spacing: 0.35em;
  text-transform: uppercase;
  color: var(--or);
  margin-top: 4px;
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: 40px;
  list-style: none;
}

.nav-menu a {
  font-size: 0.85rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  font-weight: 500;
  color: var(--creme);
  position: relative;
  padding: 8px 0;
}

.nav-menu a::after {
  content: '';
  position: absolute;
  left: 0;
  bottom: 0;
  width: 0;
  height: 1px;
  background: var(--or);
  transition: width var(--transition);
}

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

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

.nav-menu a.active {
  color: var(--or);
}

.nav-toggle {
  display: none;
  width: 32px;
  height: 32px;
  flex-direction: column;
  justify-content: center;
  gap: 6px;
}

.nav-toggle span {
  display: block;
  width: 100%;
  height: 1px;
  background: var(--creme);
  transition: var(--transition);
}

.nav-toggle.active span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle.active span:nth-child(2) { opacity: 0; }
.nav-toggle.active span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ========== BOUTONS ========== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  padding: 18px 38px;
  font-size: 0.8rem;
  font-weight: 500;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  border: 1px solid var(--or);
  color: var(--creme);
  background: transparent;
  transition: all var(--transition);
  cursor: pointer;
  position: relative;
  overflow: hidden;
}

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

.btn:hover::before {
  left: 0;
}

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

.btn-primary {
  background: var(--or);
  color: var(--noir);
}

.btn-primary::before {
  background: var(--or-clair);
}

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

.btn-arrow::after {
  content: '→';
  font-size: 1rem;
  transition: transform var(--transition);
}

.btn-arrow:hover::after {
  transform: translateX(4px);
}

/* ========== HERO ========== */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  padding: 0;
  color: var(--creme);
}

.hero-bg {
  position: absolute;
  inset: 0;
  z-index: 0;
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
}

.hero-overlay {
  position: absolute;
  inset: 0;
  z-index: 1;
  background: linear-gradient(
    180deg,
    rgba(10, 10, 10, 0.55) 0%,
    rgba(10, 10, 10, 0.45) 40%,
    rgba(10, 10, 10, 0.9) 100%
  );
}

.hero-content {
  position: relative;
  z-index: 2;
  text-align: center;
  max-width: 900px;
  padding: 0 40px;
  animation: heroFadeIn 1.4s ease-out;
}

.hero-logo {
  height: 450px;
  width: auto;
  margin-bottom: 30px;
  display: block;
  margin-left: auto;
  margin-right: auto;
}

.hero-content h1 {
  margin-bottom: 8px;
  font-weight: 300;
  font-size: clamp(2.2rem, 4.5vw, 4rem);
  white-space: nowrap;
}

.hero-content h1 em {
  font-style: italic;
  color: var(--or-clair);
  font-weight: 400;
}

.hero-content .lede {
  margin: 0 auto 40px;
  max-width: 640px;
}

.hero-cta {
  display: flex;
  gap: 20px;
  justify-content: center;
  flex-wrap: wrap;
  margin-top: 40px;
}

.hero-scroll {
  position: absolute;
  bottom: 40px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 2;
  font-size: 0.7rem;
  letter-spacing: 0.3em;
  text-transform: uppercase;
  color: var(--or);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
  animation: bob 2.5s ease-in-out infinite;
}

.hero-scroll::after {
  content: '';
  width: 1px;
  height: 50px;
  background: var(--or);
  opacity: 0.5;
}

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

@keyframes bob {
  0%, 100% { transform: translateX(-50%) translateY(0); }
  50% { transform: translateX(-50%) translateY(10px); }
}

/* ========== HERO SECONDAIRE (pages intérieures) ========== */
.hero-page {
  min-height: 60vh;
  padding: 180px 40px 100px;
}

.hero-page h1 {
  font-size: clamp(2.5rem, 5vw, 4.5rem);
}

/* ========== SECTIONS DE CONTENU ========== */
.bg-noir-doux { background-color: var(--noir-doux); }
.bg-carte { background-color: var(--noir-carte); }

.two-col {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: center;
}

.two-col-text h2 { margin-bottom: 24px; }
.two-col-text p { margin-bottom: 20px; font-size: 1.05rem; }
.two-col-text .btn { margin-top: 30px; }

.two-col-image {
  position: relative;
  aspect-ratio: 4/5;
  overflow: hidden;
}

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

.two-col-image:hover img { transform: scale(1.05); }

.two-col-image::before {
  content: '';
  position: absolute;
  inset: 20px;
  border: 1px solid var(--or);
  z-index: 2;
  pointer-events: none;
  opacity: 0.8;
}

/* ========== SERVICES / CARTES ========== */
.grid {
  display: grid;
  gap: 30px;
}

.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }

.card {
  background: var(--noir-doux);
  padding: 50px 40px;
  border: 1px solid transparent;
  transition: all var(--transition);
  position: relative;
}

.card:hover {
  border-color: var(--or);
  transform: translateY(-6px);
  background: var(--noir-carte);
}

.card-icon {
  width: 50px;
  height: 50px;
  margin-bottom: 30px;
  color: var(--or);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2rem;
}

.card h3 {
  margin-bottom: 16px;
  font-size: 1.5rem;
}

.card p {
  color: var(--gris-clair);
  font-size: 0.95rem;
}

.card-number {
  font-family: var(--ff-serif);
  font-size: 3.5rem;
  color: var(--or);
  opacity: 0.3;
  line-height: 1;
  margin-bottom: 20px;
  font-style: italic;
}

/* ========== \u00c9QUIPE ========== */
.team-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 30px;
}

.team-card {
  position: relative;
  cursor: pointer;
  overflow: hidden;
}

.team-photo {
  position: relative;
  aspect-ratio: 3/4;
  background: var(--noir-doux);
  overflow: hidden;
  margin-bottom: 24px;
}

.team-photo img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-lent);
  filter: grayscale(30%);
}

.team-card:hover .team-photo img {
  transform: scale(1.05);
  filter: grayscale(0%);
}

.team-photo::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, transparent 50%, rgba(10, 10, 10, 0.7) 100%);
  opacity: 0;
  transition: opacity var(--transition);
}

.team-card:hover .team-photo::after { opacity: 1; }

.team-info h3 {
  margin-bottom: 6px;
  font-size: 1.5rem;
}

.team-role {
  font-size: 0.75rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--or);
  margin-bottom: 16px;
  display: block;
}

.team-bio {
  font-size: 0.9rem;
  color: var(--gris-clair);
  line-height: 1.6;
}

.team-contact {
  margin-top: 20px;
  display: flex;
  gap: 16px;
  font-size: 0.85rem;
  color: var(--or);
}

.team-contact a:hover { color: var(--or-clair); }

/* ========== STATS ========== */
.stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 40px;
  padding: 80px 0;
  border-top: 1px solid var(--gris-fonce);
  border-bottom: 1px solid var(--gris-fonce);
}

.stat {
  text-align: center;
}

.stat-number {
  font-family: var(--ff-serif);
  font-size: clamp(3rem, 5vw, 4.5rem);
  color: var(--or);
  font-weight: 400;
  line-height: 1;
  margin-bottom: 12px;
  display: block;
}

.stat-label {
  font-size: 0.8rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--gris-clair);
}

/* ========== TIMELINE / PROCESSUS ========== */
.timeline {
  max-width: 900px;
  margin: 0 auto;
  position: relative;
}

.timeline::before {
  content: '';
  position: absolute;
  left: 30px;
  top: 0;
  bottom: 0;
  width: 1px;
  background: var(--or);
  opacity: 0.3;
}

.timeline-item {
  position: relative;
  padding-left: 90px;
  padding-bottom: 60px;
}

.timeline-item:last-child { padding-bottom: 0; }

.timeline-item::before {
  content: '';
  position: absolute;
  left: 22px;
  top: 6px;
  width: 17px;
  height: 17px;
  border: 2px solid var(--or);
  background: var(--noir);
  border-radius: 50%;
}

.timeline-number {
  font-family: var(--ff-serif);
  font-style: italic;
  font-size: 1rem;
  color: var(--or);
  letter-spacing: 0.1em;
  margin-bottom: 8px;
  display: block;
}

.timeline-item h3 {
  margin-bottom: 12px;
  font-size: 1.6rem;
}

/* ========== T\u00c9MOIGNAGES ========== */
.testimonial {
  max-width: 900px;
  margin: 0 auto;
  text-align: center;
  padding: 60px 40px;
}

.testimonial .quote-mark {
  font-family: var(--ff-serif);
  font-size: 5rem;
  color: var(--or);
  line-height: 1;
  margin-bottom: -20px;
  opacity: 0.5;
}

.testimonial blockquote {
  font-family: var(--ff-serif-sous);
  font-size: 1.75rem;
  line-height: 1.5;
  color: var(--creme);
  font-style: italic;
  font-weight: 300;
  margin-bottom: 30px;
}

.testimonial cite {
  font-style: normal;
  font-size: 0.85rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--or);
}

/* ========== CALCULATEUR ========== */
.calc-wrap {
  max-width: 1100px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  background: var(--noir-doux);
  padding: 60px;
  border: 1px solid var(--border-or);
}

.calc-form {
  display: flex;
  flex-direction: column;
  gap: 28px;
}

.calc-field label {
  display: block;
  font-size: 0.75rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--or);
  margin-bottom: 10px;
}

.calc-field input,
.calc-field select {
  width: 100%;
  padding: 14px 18px;
  background: var(--noir);
  border: 1px solid var(--gris-fonce);
  color: var(--creme);
  font-family: var(--ff-sans);
  font-size: 1rem;
  transition: border-color var(--transition);
}

.calc-field input:focus,
.calc-field select:focus {
  outline: none;
  border-color: var(--or);
}

.calc-slider {
  -webkit-appearance: none;
  appearance: none;
  width: 100%;
  height: 2px;
  background: var(--gris-fonce);
  outline: none;
  margin-top: 8px;
}

.calc-slider::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 16px;
  height: 16px;
  background: var(--or);
  cursor: pointer;
  border-radius: 50%;
}

.calc-slider::-moz-range-thumb {
  width: 16px;
  height: 16px;
  background: var(--or);
  cursor: pointer;
  border: none;
  border-radius: 50%;
}

.calc-value {
  font-family: var(--ff-serif);
  font-size: 1.2rem;
  color: var(--or);
  margin-top: 6px;
}

.calc-result {
  background: var(--noir);
  padding: 50px 40px;
  border: 1px solid var(--or);
  text-align: center;
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.calc-result-label {
  font-size: 0.75rem;
  letter-spacing: 0.25em;
  text-transform: uppercase;
  color: var(--or);
  margin-bottom: 16px;
}

.calc-result-amount {
  font-family: var(--ff-serif);
  font-size: clamp(3rem, 6vw, 4.5rem);
  color: var(--creme);
  line-height: 1;
  margin-bottom: 30px;
}

.calc-result-detail {
  display: flex;
  justify-content: space-between;
  padding: 14px 0;
  border-top: 1px solid var(--gris-fonce);
  font-size: 0.9rem;
}

.calc-result-detail span:first-child {
  color: var(--gris-clair);
  letter-spacing: 0.05em;
}

.calc-result-detail span:last-child {
  color: var(--or);
  font-family: var(--ff-serif);
  font-size: 1.1rem;
}

.calc-note {
  margin-top: 40px;
  padding: 20px;
  background: var(--noir-doux);
  border-left: 3px solid var(--or);
  font-size: 0.85rem;
  color: var(--gris-clair);
  font-style: italic;
}

/* ========== ARTICLES / CONSEILS ========== */
.article-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 40px;
}

.article-card {
  background: var(--noir-doux);
  overflow: hidden;
  transition: all var(--transition);
  border: 1px solid transparent;
  display: flex;
  flex-direction: column;
}

.article-card:hover {
  border-color: var(--or);
  transform: translateY(-6px);
}

.article-image {
  aspect-ratio: 16/10;
  overflow: hidden;
  background: var(--noir);
}

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

.article-card:hover .article-image img { transform: scale(1.06); }

.article-body {
  padding: 30px;
  flex-grow: 1;
  display: flex;
  flex-direction: column;
}

.article-category {
  font-size: 0.7rem;
  letter-spacing: 0.3em;
  text-transform: uppercase;
  color: var(--or);
  margin-bottom: 14px;
}

.article-card h3 {
  font-size: 1.4rem;
  margin-bottom: 14px;
  line-height: 1.3;
}

.article-excerpt {
  color: var(--gris-clair);
  font-size: 0.95rem;
  margin-bottom: 24px;
  flex-grow: 1;
}

.article-read {
  font-size: 0.8rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--or);
  align-self: flex-start;
}

.article-read::after {
  content: ' →';
  transition: transform var(--transition);
  display: inline-block;
}

.article-card:hover .article-read::after { transform: translateX(4px); }

/* ========== FORMULAIRE ========== */
.form-wrap {
  max-width: 800px;
  margin: 0 auto;
}

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

.form-field {
  margin-bottom: 24px;
}

.form-field label {
  display: block;
  font-size: 0.75rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--or);
  margin-bottom: 10px;
}

.form-field input,
.form-field textarea,
.form-field select {
  width: 100%;
  padding: 16px 20px;
  background: var(--noir-doux);
  border: 1px solid var(--gris-fonce);
  color: var(--creme);
  font-family: var(--ff-sans);
  font-size: 1rem;
  transition: border-color var(--transition);
}

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

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

/* ========== CTA BAND ========== */
.cta-band {
  text-align: center;
  padding: 140px 40px;
  background: linear-gradient(180deg, var(--noir-doux) 0%, var(--noir) 100%);
  position: relative;
}

.cta-band::before,
.cta-band::after {
  content: '';
  position: absolute;
  left: 50%;
  width: 60px;
  height: 1px;
  background: var(--or);
  transform: translateX(-50%);
}

.cta-band::before { top: 40px; }
.cta-band::after { bottom: 40px; }

.cta-band h2 {
  font-size: clamp(2rem, 4vw, 3.5rem);
  margin-bottom: 20px;
  max-width: 900px;
  margin-left: auto;
  margin-right: auto;
}

.cta-band p {
  margin: 0 auto 40px;
  max-width: 600px;
  font-size: 1.1rem;
}

/* ========== FOOTER ========== */
.footer {
  background: var(--noir);
  padding: 80px 40px 30px;
  border-top: 1px solid var(--gris-fonce);
}

.footer-grid {
  max-width: var(--max-width);
  margin: 0 auto;
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 60px;
  padding-bottom: 60px;
  border-bottom: 1px solid var(--gris-fonce);
}

.footer-brand .logo-main {
  font-family: var(--ff-serif);
  font-size: 2rem;
  color: var(--creme);
  display: block;
  margin-bottom: 8px;
}

.footer-brand .logo-main span { color: var(--or); }

.footer-brand .logo-sub {
  font-size: 0.65rem;
  letter-spacing: 0.35em;
  text-transform: uppercase;
  color: var(--or);
  margin-bottom: 24px;
  display: block;
}

.footer-brand p {
  font-size: 0.9rem;
  color: var(--gris-clair);
  max-width: 360px;
}

.footer-col h4 {
  font-family: var(--ff-sans);
  font-size: 0.75rem;
  letter-spacing: 0.25em;
  text-transform: uppercase;
  color: var(--or);
  margin-bottom: 24px;
  font-weight: 600;
}

.footer-col ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.footer-col a {
  color: var(--gris-clair);
  font-size: 0.9rem;
  transition: color var(--transition);
}

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

.footer-bottom {
  max-width: var(--max-width);
  margin: 30px auto 0;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 16px;
  font-size: 0.8rem;
  color: var(--gris-texte);
}

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

/* ========== ANIMATIONS AU SCROLL ========== */
.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 1s ease-out, transform 1s ease-out;
}

.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ========== S\u00c9PARATEUR OR ========== */
.ornament {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  margin: 0 auto 24px;
  color: var(--or);
}

.ornament::before,
.ornament::after {
  content: '';
  width: 50px;
  height: 1px;
  background: var(--or);
}

.ornament .diamond {
  width: 6px;
  height: 6px;
  background: var(--or);
  transform: rotate(45deg);
}

/* ========== RESPONSIVE ========== */
@media (max-width: 1024px) {
  :root { --padding-section: 80px 30px; }

  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .grid-3 { grid-template-columns: repeat(2, 1fr); }
  .team-grid { grid-template-columns: repeat(2, 1fr); }
  .article-grid { grid-template-columns: repeat(2, 1fr); }
  .stats { grid-template-columns: repeat(2, 1fr); gap: 30px; }
  .two-col { grid-template-columns: 1fr; gap: 40px; }
  .calc-wrap { grid-template-columns: 1fr; padding: 40px; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 768px) {
  :root { --padding-section: 60px 24px; }

  .container { padding: 0 24px; }
  .nav { padding: 18px 24px; }
  .nav.scrolled { padding: 14px 24px; }

  .nav-toggle { display: flex; }

  .nav-menu {
    position: fixed;
    top: 0;
    right: 0;
    bottom: 0;
    width: 80%;
    max-width: 320px;
    background: var(--noir);
    border-left: 1px solid var(--or);
    flex-direction: column;
    justify-content: center;
    padding: 40px;
    transform: translateX(100%);
    transition: transform var(--transition);
    gap: 32px;
  }

  .nav-menu.open { transform: translateX(0); }
  .nav-menu a { font-size: 1rem; }

  .hero { min-height: 90vh; }
  .hero-cta { flex-direction: column; align-items: center; }
  .btn { width: 100%; max-width: 320px; }

  .grid-4, .grid-3, .team-grid, .article-grid { grid-template-columns: 1fr; }
  .stats { grid-template-columns: 1fr 1fr; }

  .footer-grid { grid-template-columns: 1fr; gap: 40px; }
  .footer-bottom { flex-direction: column; text-align: center; }

  .form-row { grid-template-columns: 1fr; }
  .calc-wrap { padding: 30px 24px; }

  .timeline::before { left: 12px; }
  .timeline-item { padding-left: 50px; }
  .timeline-item::before { left: 4px; }
}

/* ========== UTILITAIRES ========== */
.text-center { text-align: center; }
.mt-0 { margin-top: 0; }
.mt-2 { margin-top: 16px; }
.mt-4 { margin-top: 32px; }
.mb-0 { margin-bottom: 0; }