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

body {
  font-family: Arial, sans-serif;
  background: #09090b;
  color: white;
  line-height: 1.6;
}

a {
  color: inherit;
  text-decoration: none;
}

header {
  min-height: 100vh;
  background:
    radial-gradient(circle at top right, rgba(234, 179, 8, 0.24), transparent 35%),
    linear-gradient(135deg, #09090b, #18181b);
}

.btn-retour-site {
  position: fixed;
  bottom: 25px;
  left: 25px;
  z-index: 9999;

  padding: 13px 22px;
  border-radius: 999px;

  background: rgba(234, 179, 8, 0.24);
  color: white;
  text-decoration: none;

  font-size: 14px;
  font-weight: 600;

  border: 1px solid rgba(255, 255, 255, 0.15);
  backdrop-filter: blur(12px);

  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.35);
  transition: 0.25s ease;
}

.btn-retour-site:hover {
  background: #ef4444;
  transform: translateY(-3px);
  box-shadow: 0 15px 35px rgba(239, 68, 68, 0.35);
}

.nav {
  width: min(1120px, 92%);
  height: 76px;
  margin: auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo {
  font-size: 1.4rem;
  font-weight: 900;
}

.logo span {
  color: #eab308;
}

.links {
  display: flex;
  gap: 24px;
  color: #d4d4d8;
}

.hero {
  width: min(1120px, 92%);
  margin: auto;
  min-height: calc(100vh - 76px);
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 36px;
  align-items: center;
}

.badge {
  display: inline-block;
  color: #eab308;
  font-weight: 900;
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-bottom: 12px;
}

h1 {
  font-size: clamp(2.6rem, 7vw, 5.6rem);
  line-height: 0.95;
  margin-bottom: 18px;
}

.hero p {
  color: #d4d4d8;
  max-width: 620px;
}

.btn {
  display: inline-flex;
  margin-top: 24px;
  padding: 14px 22px;
  border-radius: 999px;
  background: #eab308;
  color: #09090b;
  font-weight: 900;
}

.hero-visual {
  height: 420px;
  border-radius: 34px;
  display: grid;
  place-items: center;
  background: linear-gradient(145deg, rgba(255,255,255,0.12), rgba(255,255,255,0.04));
  border: 1px solid rgba(255,255,255,0.12);
  box-shadow: 0 35px 90px rgba(0,0,0,0.4);
}

.hero-visual span {
  font-size: 8rem;
}

.section {
  width: min(1120px, 92%);
  margin: auto;
  padding: 80px 0;
}

.section h2,
.contact h2 {
  font-size: clamp(2rem, 5vw, 3.7rem);
  line-height: 1;
  margin-bottom: 26px;
}

.grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 22px;
}

.grid article,
.price-list,
.reviews p {
  background: #18181b;
  border: 1px solid rgba(255,255,255,0.1);
  padding: 28px;
  border-radius: 24px;
}

.grid h3 {
  color: #eab308;
  font-size: 1.4rem;
}

.grid p {
  color: #d4d4d8;
  margin-top: 10px;
}

.price-list {
  display: grid;
  gap: 14px;
}

.price-list div {
  display: flex;
  justify-content: space-between;
  border-bottom: 1px solid rgba(255,255,255,0.08);
  padding: 14px 0;
}

.price-list strong {
  color: #eab308;
}

.reviews {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}

.contact {
  width: min(900px, 92%);
  margin: 60px auto;
  padding: 56px 24px;
  text-align: center;
  border-radius: 32px;
  background: linear-gradient(135deg, #eab308, #ca8a04);
  color: #09090b;
}

.contact p {
  font-weight: 700;
}

.contact .btn {
  background: #09090b;
  color: white;
}

footer {
  text-align: center;
  color: #a1a1aa;
  padding: 28px;
}

/* Responsive tablette / mobile */
@media (max-width: 850px) {
  nav div {
    display: none;
  }

  .stats,
  .cards,
  .devis {
    grid-template-columns: 1fr;
  }

  .devis {
    padding: 32px 22px;
  }
}

/* Bouton retour sur mobile */
@media (max-width: 768px) {
  .btn-retour-site {
    bottom: 15px;
    left: 15px;
    padding: 11px 16px;
    font-size: 13px;
  }
}