:root {
  --yellow:#FFC800;--black:#000;--steel:#444;--white:#fff;
  --bg:#090909;--card:#111;--glass:rgba(255,255,255,0.03);
  --radius:14px;--max-width:1100px;--font-sans:"Inter",sans-serif;
}

* {
  box-sizing:border-box;
}

html, body {
  overflow-x: hidden; /* Empêche le décalage horizontal */
}

body {
  margin:0;
  font-family:var(--font-sans);
  background:linear-gradient(180deg,var(--bg),#060606);
  color:var(--white);
  line-height:1.45;
}

.container {
  max-width:var(--max-width);
  margin:auto;
  padding:28px 5px;
}

/* ---------- HERO + effet huile CSS ---------- */
.hero {
  display:grid;
  grid-template-columns:1fr 420px;
  gap:32px;
  align-items:center;
  padding:36px;
  background:linear-gradient(90deg,rgba(255,200,0,0.06),rgba(0,0,0,0.2));
  border-radius:var(--radius);
  box-shadow:0 8px 30px rgba(0,0,0,0.6);
  position:relative;
  overflow:hidden;
  margin-top:18px;
}

.hero::before {
  content:"";
  position:absolute;
  inset:0;
  background:linear-gradient(to bottom, rgba(255,200,0,0.07), rgba(0,0,0,0));
  z-index:0;
  pointer-events:none;
}

.hero::after {
  content:"";
  position:absolute;
  left:0;right:0;
  top:-140px;
  height:260px;
  background:
    radial-gradient(60px 90px at 12% 0%,  rgba(255,200,0,0.12), transparent 60%),
    radial-gradient(90px 130px at 40% -40px, rgba(255,200,0,0.10), transparent 60%),
    radial-gradient(70px 110px at 72% -30px, rgba(255,200,0,0.10), transparent 60%),
    radial-gradient(95px 150px at 96% -50px, rgba(255,200,0,0.12), transparent 60%);
  animation: oilFall 10s linear infinite;
  z-index:0;
  pointer-events:none;
}

@keyframes oilFall {
  0%   { transform: translateY(0); }
  100% { transform: translateY(160px); }
}

.brand {
  display:flex;
  flex-direction:column;
  gap:16px;
  position:relative;
  z-index:1;
}
.kicker {
  background:var(--yellow);
  color:var(--black);
  padding:6px 12px;
  border-radius:999px;
  font-weight:700;
  width:max-content;
}
h1 {
  margin:0;
  font-size:2.6rem;
  color:var(--white);
  text-shadow:0 6px 20px rgba(0,0,0,0.6);
}
.lead {
  color:#ddd;
  font-size:1.05rem;
}
.hero-ctas {
  margin-top:18px;
  display:flex;
  gap:12px;
  flex-wrap:wrap;
}

/* ---------- Boutons ---------- */
.btn {
  display:inline-flex;
  align-items:center;
  gap:10px;
  font-weight:700;
  padding:12px 18px;
  border-radius:10px;
  box-shadow:0 8px 18px rgba(0,0,0,0.5);
  text-decoration:none;
  border:none;
  cursor:pointer;
}
.btn-primary {
  background:linear-gradient(180deg,var(--yellow),#e6b800);
  color:var(--black);
}
.btn-ghost {
  background:transparent;
  border:1px solid rgba(255,255,255,0.06);
  color:var(--white);
}

/* ---------- Produit Flip ---------- */
.product-card {
  position: relative;
  perspective: 1000px;
  width: 100%;
  max-width: 420px;
  aspect-ratio: 3 / 4;
  min-height: 360px;
  margin: 0 auto;
  background: linear-gradient(180deg, rgba(255,255,255,0.02), rgba(255,255,255,0.01));
  border-radius: 12px;
  z-index: 1;
}

.flip-inner {
  position: relative;
  width: 100%;
  height: 100%;
  transform-style: preserve-3d;
  transition: transform .8s;
}

.flip-front, .flip-back {
  position: absolute;
  inset: 0;
  backface-visibility: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 10px;
}

.flip-front img, .flip-back img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  filter: drop-shadow(0 18px 40px rgba(0,0,0,.6));
}

.flip-back { transform: rotateY(180deg); }

/* ---------- Layout & Cards ---------- */
.grid-2 {
  display:grid;
  grid-template-columns:1fr 380px;
  gap:28px;
  margin-top:28px;
}
.card {
  background:var(--card);
  padding:22px;
  border-radius:12px;
  box-shadow:0 6px 18px rgba(0,0,0,0.6);
}
h2 {
  color:var(--yellow);
  margin-bottom:14px;
  font-size:1.25rem;
}

/* ---------- Table (COA) ---------- */
table {
  width:100%;
  border-collapse:collapse;
  font-size:0.95rem;
  margin-bottom:12px;
}
th,td {
  padding:10px;
  border-bottom:1px solid rgba(255,255,255,0.04);
}
th {
  background:linear-gradient(90deg,var(--yellow),#b38f00);
  color:var(--black);
}

/* ---------- Features ---------- */
.features {
  display:grid;
  grid-template-columns:repeat(auto-fit,minmax(160px,1fr));
  gap:12px;
  margin-bottom:16px;
}
.feature {
  background:rgba(255,255,255,0.02);
  padding:12px;
  border-radius:10px;
}
.feature strong { color:var(--yellow); }

/* ---------- Recommandations & Certifs ---------- */
.reco {
  background:var(--yellow);
  color:var(--black);
  padding:12px;
  border-radius:10px;
  margin-bottom:16px;
}
.certs {
  display:flex;
  gap:12px;
  flex-wrap:wrap;
}
.cert-box {
  background:rgba(255,255,255,0.05);
  padding:10px;
  border-radius:8px;
  text-align:center;
  flex:1 1 120px;
}

/* ---------- Images techniques ---------- */
.tech-imgs {
  display:flex;
  gap:10px;
  margin-top:12px;
}
.tech-imgs img {
  width:calc(50% - 5px);
  border-radius:8px;
  transition:transform .3s;
}
.tech-imgs img:hover { transform:scale(1.05); }

/* ---------- Formulaire ---------- */
form .row {
  display:flex;
  gap:10px;
  margin-bottom:10px;
}
label {
  font-size:0.88rem;
  color:#ddd;
}
input,select,textarea {
  width:100%;
  padding:10px;
  border-radius:8px;
  background:var(--glass);
  border:1px solid rgba(255,255,255,0.03);
  color:var(--white);
}
textarea { min-height:110px;resize:vertical; }
.order-actions {
  display:flex;
  gap:10px;
  align-items:center;
  margin-top:12px;
}
.price-bloc {
  background:rgba(255,200,0,0.06);
  padding:14px;
  border-radius:10px;
  text-align:center;
}
.price-bloc .price {
  font-size:1.4rem;
  font-weight:800;
  color:var(--yellow);
}

/* ---------- Footer ---------- */
footer {
  text-align:center;
  color:#9a9a9a;
  margin:36px 0 80px 0;
  font-size:0.9rem;
}

/* ---------- Responsive ---------- */
@media(max-width:1000px) {
  .hero {
    grid-template-columns:1fr;
    text-align:center;
    padding: 20px;
  }
  .grid-2 {
    grid-template-columns:1fr;
  }
  .product-card {
    max-width:300px;
    min-height: 300px;
  }
  .tech-imgs {
    flex-direction: column;
  }
  .tech-imgs img {
    width: 100%;
  }
}