:root {
  --bg-deep: #0B0914;
  --gold: #FFD700;
  --sunset: #FF7E5F;
  --violet: #8A2BE2;
  --text-main: #F8F5FF;
  --text-soft: #E6E6FA;
  --glass: rgba(255,255,255,0.06);
  --glass-border: rgba(255,255,255,0.12);
  --font-serif: 'Cormorant Garamond', serif;
  --font-sans: 'Inter', system-ui, sans-serif;
}

* { margin:0; padding:0; box-sizing:border-box; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font-sans);
  background: var(--bg-deep);
  color: var(--text-main);
  overflow-x: hidden;
  line-height: 1.6;
}

/* NAV */
.main-nav {
  position: fixed; top:0; left:0; width:100%; z-index:100;
  display: flex; justify-content: space-between; align-items: center;
  padding: 1rem 5%;
  background: rgba(11,9,20,0.7);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--glass-border);
}
.logo { font-family: var(--font-serif); font-size:1.5rem; font-weight:600; color:var(--gold); text-decoration:none; }
.nav-links { display:flex; gap:2rem; list-style:none; }
.nav-links a { color:var(--text-soft); text-decoration:none; font-weight:400; transition:color 0.3s; }
.nav-links a:hover { color:var(--gold); }
.lang-switcher button {
  background:transparent; border:1px solid var(--glass-border); color:var(--text-soft);
  padding:0.4rem 0.8rem; margin-left:0.5rem; cursor:pointer; border-radius:6px; transition:all 0.3s;
}
.lang-switcher button.active, .lang-switcher button:hover { background:var(--gold); color:var(--bg-deep); }

/* HERO & AURORA */
.hero {
  position:relative; min-height:100vh; display:flex; flex-direction:column;
  justify-content:center; align-items:center; padding:2rem; overflow:hidden;
}
.aurora-bg {
  position:absolute; inset:0; z-index:0; pointer-events:none;
  background:
    radial-gradient(circle at 20% 30%, var(--gold) 0%, transparent 45%),
    radial-gradient(circle at 80% 70%, var(--violet) 0%, transparent 50%),
    radial-gradient(circle at 50% 50%, var(--sunset) 0%, transparent 55%);
  mix-blend-mode: screen;
  animation: aurora 14s ease-in-out infinite alternate;
}
@keyframes aurora {
  0% { transform: scale(1) translate(0,0); filter: hue-rotate(0deg); }
  100% { transform: scale(1.15) translate(-5%, 5%); filter: hue-rotate(15deg); }
}

/* GLASS CARD */
.glass-card {
  position:relative; z-index:2; background:var(--glass);
  backdrop-filter: blur(14px); border:1px solid var(--glass-border);
  border-radius:24px; padding:3rem 2rem; max-width:720px; text-align:center;
  box-shadow: 0 12px 40px rgba(138,43,226,0.2);
  animation: fadeUp 1.2s cubic-bezier(0.2,0.8,0.2,1);
}
h1 {
  font-family:var(--font-serif); font-weight:300; font-size:clamp(2.4rem, 6vw, 4.5rem);
  line-height:1.1; margin-bottom:1.2rem;
  background:linear-gradient(90deg, var(--gold), var(--sunset), var(--violet));
  -webkit-background-clip:text; -webkit-text-fill-color:transparent;
}
p { font-size:clamp(1rem, 2.2vw, 1.25rem); color:var(--text-soft); margin-bottom:2rem; }
.btn-solar {
  display:inline-block; padding:14px 36px; background:linear-gradient(90deg, var(--gold), var(--violet));
  color:var(--bg-deep); font-weight:500; text-decoration:none; border-radius:50px;
  transition:transform 0.3s, box-shadow 0.3s;
}
.btn-solar:hover { transform:translateY(-3px); box-shadow:0 10px 25px rgba(255,215,0,0.4); }

.scroll-hint { position:absolute; bottom:30px; z-index:2; animation:pulse 2s infinite; }
@keyframes fadeUp { from{opacity:0;transform:translateY(30px)} to{opacity:1;transform:translateY(0)} }
@keyframes pulse { 0%,100%{opacity:0.4;transform:scale(1)} 50%{opacity:1;transform:scale(1.1)} }

/* MOBILE */
@media(max-width:768px){
  .nav-links{ display:none; } /* Tu peux ajouter un menu burger en JS léger si besoin */
  .glass-card{ padding:2rem 1.5rem; }
}