:root {
    --gold: #c5a059;
    --gold-bright: #e3c48a;
    --gold-dark: #8a6d3b;
    --bg: #050505;
    --glass: rgba(20, 20, 20, 0.7);
    --border-gold: rgb(197 160 89);
    --ease: cubic-bezier(0.19, 1, 0.22, 1);
}

* { margin:0; padding:0; box-sizing:border-box; }
body { background: var(--bg); color: white; font-family: 'Inter', sans-serif; overflow-x: hidden; }

/* EFFET DE GRAIN */
.gold-grain-overlay {
    position: fixed; inset: 0; pointer-events: none; z-index: 999;
    background-image: url('https://www.transparenttextures.com/patterns/stardust.png');
    opacity: 0.15;
}

/* NAVIGATION & MENU MOBILE */
.minimal-nav {
    position: fixed; width: 100%; top: 0; padding: 25px 6%;
    display: flex; justify-content: space-between; align-items: center; z-index: 1000;
    background: rgba(5,5,5,0.7); backdrop-filter: blur(10px); border-bottom: 1px solid rgba(255,255,255,0.05);
}
.logo { font-family: 'Playfair Display'; font-size: 1.6rem; letter-spacing: 5px; color: white; text-decoration: none; font-weight: 700; position: relative; z-index: 1001; }
.logo .dot { color: var(--gold); }

.nav-links { display: flex; align-items: center; gap: 40px; }
.back-link { color: #cdcdcd; text-decoration: none; font-size: 0.7rem; letter-spacing: 2px; text-transform: uppercase; transition: 0.3s; }
.back-link:hover { color: var(--gold); }

.cta-gold {
    background: linear-gradient(135deg, var(--gold-dark), var(--gold-bright));
    padding: 12px 25px; color: black !important; font-weight: 600; text-decoration: none;
    font-size: 0.7rem; text-transform: uppercase; letter-spacing: 1px; border-radius: 2px;
    box-shadow: 0 5px 15px rgba(197, 160, 89, 0.2); transition: 0.4s; text-align: center;
}
.cta-gold:hover { transform: translateY(-3px); box-shadow: 0 10px 25px rgba(197, 160, 89, 0.4); }

/* BOUTON BURGER */
.menu-toggle { display: none; flex-direction: column; justify-content: space-between; width: 30px; height: 20px; background: transparent; border: none; cursor: pointer; z-index: 1001; }
.menu-toggle span { width: 100%; height: 2px; background-color: var(--gold); transition: all 0.3s ease; }

/* HERO GOLD */
.hero-gold { height: 100vh; display: grid; grid-template-columns: 1fr 1fr; align-items: center; }
.hero-content { padding-left: 12%; position: relative; z-index: 2; }
.gold-line { width: 50px; height: 1px; background: var(--gold); margin-bottom: 25px; }
.category { color: var(--gold); font-size: 0.65rem; letter-spacing: 4px; text-transform: uppercase; margin-bottom: 20px; display: block; }

h1 { font-family: 'Playfair Display'; font-size: clamp(3rem, 7vw, 6rem); line-height: 0.95; margin-bottom: 20px; }
h1 span { display: block; font-style: italic; font-weight: 400; color: var(--gold); }

.glint-text {
    background: linear-gradient(to right, #fff 20%, var(--gold-bright) 40%, var(--gold-bright) 60%, #fff 80%);
    background-size: 200% auto; -webkit-background-clip: text; -webkit-text-fill-color: transparent;
    animation: glint 5s linear infinite;
}
@keyframes glint { to { background-position: 200% center; } }

.hero-sub { color: #888; font-weight: 200; font-size: 1.1rem; max-width: 400px; }

.hero-image-container { position: relative; height: 100vh; overflow: hidden; }
.hero-image-container img { width: 100%; height: 100%; object-fit: cover; filter: brightness(0.7); transition: 1.5s var(--ease); }
.hero-image-container:hover img { transform: scale(1.05); filter: brightness(0.9); }
.gold-gradient-overlay { position: absolute; inset: 0; background: linear-gradient(to right, var(--bg), transparent); }

/* SPECS GLASS GOLD */
.container-premium { max-width: 1200px; margin: 0 auto; padding: 0 5%; }
.specs-section { padding: 150px 0; }
.specs-wrapper { display: flex; align-items: center; position: relative; gap: 80px; }
.specs-image { width: 55%; position: relative; }
.specs-image img { width: 100%; border-radius: 5px; }
.border-accent { position: absolute; inset: -20px; border: 1px solid var(--gold); border-radius: 5px; z-index: -1; opacity: 0.2; }

.glass-gold { 
    background: rgba(15, 15, 15, 0.85); backdrop-filter: blur(30px);
    border: 1px solid #c5a059d6; padding: 60px; border-radius: 4px;
    box-shadow: 20px 20px 60px rgba(0,0,0,0.5); width: 45%; margin-left: -100px;
}
.gold-title { font-family: 'Playfair Display'; font-size: 2rem; margin-bottom: 30px; color: var(--gold); }
.spec-row { display: flex; justify-content: space-between; padding: 18px 0; border-bottom: 1px solid rgba(197, 160, 89, 0.1); }
.spec-row span { font-size: 0.75rem; color: var(--gold-dark); text-transform: uppercase; letter-spacing: 2px; font-weight: 600; }
.spec-row strong { font-weight: 300; font-size: 1rem; color: white; }

/* STEPS ARTISANAT */
.steps-gold { padding: 150px 6%; display: flex; gap: 80px; position: relative; }
.vertical-gold-text { 
    writing-mode: vertical-rl; transform: rotate(180deg);
    font-family: 'Playfair Display'; font-size: 6rem; font-weight: 900;
    color: rgba(197, 160, 89, 0.04); pointer-events: none;
}
.steps-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 60px; width: 100%; }
.step-card { background: rgba(255,255,255,0.02); border: 1px solid rgba(255,255,255,0.05); border-radius: 4px; overflow: hidden; }
.step-card.offset { margin-top: 100px; }
.step-img-wrap { width: 100%; height: 400px; overflow: hidden; }
.step-img-wrap img { width: 100%; height: 100%; object-fit: cover; transition: 0.8s var(--ease);border-radius: 3%; }
.step-card:hover .step-img-wrap img { transform: scale(1.1); }

.step-info { padding: 40px; position: relative; background-color: #c5a05933; border-radius: 5%; }
.step-number { 
    position: absolute; top: -30px; right: 40px; font-family: 'Playfair Display';
    font-size: 5rem; color: #ffffff; opacity: 0.2; font-style: italic;
}
.step-info h3 { font-family: 'Playfair Display'; font-size: 1.8rem; margin-bottom: 15px; color: var(--gold-bright); }
.step-info p { color: #888; font-weight: 200; line-height: 1.8; }

/* VIDÉO FINALE IMPACT */
.final-reveal { padding: 100px 0; }
.video-hero { position: relative; width: 100vw; height: 90vh; overflow: hidden; border-top: 1px solid var(--border-gold); border-bottom: 1px solid var(--border-gold); }
.video-hero video { width: 100%; height: 100%; object-fit: cover; }
.shadow-gold { box-shadow: 0 0 100px rgba(197, 160, 89, 0.1); }

.video-caption-gold { position: absolute; bottom: 80px; left: 6%; text-shadow: 0 10px 30px rgba(0,0,0,0.8); }
.video-caption-gold h2 { font-family: 'Playfair Display'; font-size: 3.5rem; }
.gold-separator { width: 100px; height: 3px; background: var(--gold); margin-top: 20px; }

/* FOOTER GOLD */
.gold-footer { padding: 150px 6%; text-align: center; background: #000; }
.gold-label { display: block; color: var(--gold); font-size: 0.7rem; letter-spacing: 5px; text-transform: uppercase; margin-bottom: 30px; }
.next-title { font-family: 'Playfair Display'; font-size: clamp(2rem, 5vw, 4rem); color: white; text-decoration: none; transition: 0.4s; font-style: italic; }
.next-title:hover { color: var(--gold); letter-spacing: 5px; }

/* REVEAL */
.reveal { opacity: 0; transform: translateY(20px); transition: all 0.8s ease-out; }
.reveal.visible { opacity: 1; transform: translateY(0); }

/* --- RÉSEAUX SOCIAUX --- */
.social-sticky { position: fixed; right: 30px; top: 50%; transform: translateY(-50%); display: flex; flex-direction: column; gap: 20px; z-index: 999; }
.social-sticky a { width: 45px; height: 45px; display: flex; align-items: center; justify-content: center; background: rgba(197, 160, 89, 0.1); border: 1px solid rgba(255,255,255,0.06); border-radius: 50%; color: var(--gold); transition: all 0.4s var(--ease); backdrop-filter: blur(10px); }
.social-sticky a svg { width: 20px; height: 20px; }
.social-sticky a:hover { background: var(--gold); color: black; transform: translateX(-5px); box-shadow: 0 10px 20px rgba(197, 160, 89, 0.3); }

/* ============================================================
   --- RESPONSIVE MOBILE & TABLETTE ---
============================================================ */

@media (max-width: 1024px) {
    .hero-gold { grid-template-columns: 1fr; height: auto; min-height: 100vh; }
    .hero-content { padding: 120px 6% 60px; text-align: center; }
    .gold-line { margin: 0 auto 25px; }
    .hero-sub { margin: 0 auto; }
    .hero-image-container { height: 60vh; }
    .gold-gradient-overlay { background: linear-gradient(to top, var(--bg), transparent); }

    .specs-wrapper { flex-direction: column; gap: 0; }
    .specs-image { width: 100%; }
    .glass-gold { width: 90%; margin: -80px auto 0; padding: 40px; position: relative; z-index: 10; }
}

@media (max-width: 768px) {
    /* Typographie */
    h1 { font-size: 3.5rem; }
    .glint-text { line-height: 1.1; }
    .vertical-gold-text { display: none; } 

    /* Menu Mobile */
    .menu-toggle { display: flex; }
    .nav-links { 
        position: fixed; top: 80px; left: 0; width: 100%; height: calc(100vh - 80px); 
        background: rgba(5,5,5,0.95); backdrop-filter: blur(20px); 
        flex-direction: column; justify-content: center; align-items: center; 
        gap: 30px; transform: translateX(100%); transition: transform 0.4s var(--ease);
    }
    .nav-links.active { transform: translateX(0); }
    .menu-toggle.active span:nth-child(1) { transform: translateY(9px) rotate(45deg); }
    .menu-toggle.active span:nth-child(2) { opacity: 0; }
    .menu-toggle.active span:nth-child(3) { transform: translateY(-9px) rotate(-45deg); }
    .back-link { font-size: 1.2rem; }

    /* Section Étapes */
    .steps-gold { padding: 80px 6%; }
    .steps-grid { grid-template-columns: 1fr; gap: 40px; }
    .step-card.offset { margin-top: 0; }
    .step-img-wrap { height: 300px; }
    .step-number { font-size: 3.5rem; top: -20px; right: 20px; }
    .step-info { padding: 30px 20px; }

    /* Vidéo Finale */
    .video-hero { height: 60vh; }
    .video-caption-gold h2 { font-size: 2rem; }
    .video-caption-gold { bottom: 40px; width: 90%; }

    /* Footer & Réseaux */
    .gold-footer { padding: 100px 6%; }
    .next-title { font-size: 1.8rem; }
    .social-sticky { position: static; flex-direction: row; justify-content: center; margin: 40px 0; transform: none; width: 100%; }
}

@media (max-width: 480px) {
    h1 { font-size: 2.8rem; }
    .cta-gold { padding: 10px 18px; font-size: 0.6rem; }
    .glass-gold { padding: 25px 20px; width: 95%; }
    .gold-title { font-size: 1.5rem; }
    .spec-row span { font-size: 0.6rem; }
    .spec-row strong { font-size: 0.85rem; }
}