/* ===== Survolia — Landing (thème nuit) ===== */
@font-face { font-family: 'Fraunces'; src: url('/fonts/fraunces-latin-600-normal.woff2') format('woff2'); font-weight: 600; font-display: swap; }
@font-face { font-family: 'Fraunces'; src: url('/fonts/fraunces-latin-700-normal.woff2') format('woff2'); font-weight: 700; font-display: swap; }
@font-face { font-family: 'Inter'; src: url('/fonts/inter-latin-400-normal.woff2') format('woff2'); font-weight: 400; font-display: swap; }
@font-face { font-family: 'Inter'; src: url('/fonts/inter-latin-600-normal.woff2') format('woff2'); font-weight: 600; font-display: swap; }

:root {
  --bg: #0B0D12;
  --glass-bg: rgba(17,20,30,0.55);
  --glass-bg-strong: rgba(17,20,30,0.78);
  --glass-border: rgba(255,255,255,0.09);
  --glass-blur: 14px;
  --shadow-card: 0 18px 44px rgba(0,0,0,0.42);
  --border: rgba(148,163,216,0.18);
  --text: #E8EAF2;
  --muted: #9BA0B5;
  --accent: #6366F1;
  --accent-hover: #818CF8;
  --accent-rgb: 99, 102, 241;
  --radius: 12px;
  --transition: 200ms ease;
  --font-title: 'Fraunces', Georgia, serif;
  --font-body: 'Inter', -apple-system, 'Segoe UI', sans-serif;
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { background: var(--bg); scroll-behavior: smooth; }
body {
  font-family: var(--font-body);
  color: var(--text);
  min-height: 100vh;
  background:
    linear-gradient(180deg, rgba(8,10,16,0.78) 0%, rgba(8,10,16,0.6) 45%, rgba(8,10,16,0.9) 100%),
    url('/images/bg-nuit.webp') center / cover no-repeat fixed,
    var(--bg);
  line-height: 1.55;
}
h1, h2, h3 { font-family: var(--font-title); font-weight: 700; letter-spacing: -0.01em; line-height: 1.15; }
a { color: var(--accent-hover); }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }

.card {
  background: var(--glass-bg);
  backdrop-filter: blur(var(--glass-blur));
  -webkit-backdrop-filter: blur(var(--glass-blur));
  border: 1px solid var(--glass-border);
  border-radius: var(--radius);
  box-shadow: var(--shadow-card);
}
@supports not ((backdrop-filter: blur(1px)) or (-webkit-backdrop-filter: blur(1px))) {
  .card { background: #141724; }
}

.btn {
  display: inline-flex; align-items: center; justify-content: center;
  padding: 0.9rem 1.6rem; border: none; border-radius: 99px;
  font-family: var(--font-body); font-size: 1rem; font-weight: 600;
  cursor: pointer; text-decoration: none;
  transition: background var(--transition), transform var(--transition);
}
.btn-primary { background: var(--accent); color: #fff; }
.btn-primary:hover { background: var(--accent-hover); transform: translateY(-1px); }
.btn-secondary { background: rgba(255,255,255,0.06); color: var(--text); border: 1px solid var(--border); }
.btn-secondary:hover { border-color: var(--accent); }

/* --- Nav --- */
.nav {
  display: flex; flex-wrap: wrap; align-items: center; gap: 0.75rem 2rem;
  padding: 1rem 2rem; position: sticky; top: 0; z-index: 50;
  background: rgba(11,13,18,0.62);
  backdrop-filter: blur(12px); -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--glass-border);
}
.logo { font-family: var(--font-title); font-size: 1.35rem; font-weight: 700; color: var(--accent-hover); }
.nav-links { display: flex; align-items: center; gap: 1.5rem; margin-left: auto; flex-wrap: wrap; }
.nav-links a { color: var(--muted); text-decoration: none; font-size: 0.9rem; font-weight: 600; white-space: nowrap; transition: color var(--transition); }
.nav-links a:hover { color: var(--text); }
.nav-links a.nav-cta { color: var(--text); padding: 0.5rem 1.1rem; border: 1px solid var(--accent); border-radius: 99px; background: rgba(var(--accent-rgb), 0.14); }

/* --- Hero --- */
.hero { max-width: 900px; margin: 0 auto; padding: 5.5rem 1.5rem 3rem; text-align: center; }
.hero h1 { font-size: clamp(2.2rem, 5.5vw, 3.6rem); }
.hero h1 em { font-style: italic; color: var(--accent-hover); }
.hero-sub { color: var(--muted); font-size: 1.15rem; margin: 1.25rem 0 2rem; }
.hero-cta { display: flex; flex-direction: column; align-items: center; gap: 0.8rem; }
.hero-note { color: var(--muted); font-size: 0.85rem; }
.hero-anchor {
  margin: 2.5rem auto 0; max-width: 560px; padding: 0.9rem 1.4rem;
  border: 1px solid var(--glass-border); border-radius: var(--radius);
  background: var(--glass-bg); backdrop-filter: blur(var(--glass-blur));
  color: var(--muted); font-size: 0.95rem;
}
.hero-anchor strong { color: var(--text); }

/* --- Sections --- */
main { max-width: 1060px; margin: 0 auto; padding: 0 1.5rem 4rem; }
section { margin-top: 4.5rem; }
h2 { font-size: 2rem; text-align: center; margin-bottom: 0.5rem; }
.section-sub { text-align: center; color: var(--muted); margin-bottom: 2rem; }

/* Stats */
.stats { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 1rem; }
.stat { padding: 1.4rem; text-align: center; }
.stat strong { display: block; font-family: var(--font-title); font-size: 1.6rem; color: var(--accent-hover); }
.stat span { color: var(--muted); font-size: 0.9rem; }

/* How */
.how-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap: 1rem; margin-top: 2rem; }
.how-card { padding: 1.6rem; }
.how-num {
  display: inline-flex; align-items: center; justify-content: center;
  width: 34px; height: 34px; border-radius: 50%;
  background: rgba(var(--accent-rgb), 0.18); border: 1px solid var(--accent);
  color: var(--accent-hover); font-weight: 700; margin-bottom: 0.9rem;
}
.how-card h3 { font-size: 1.15rem; margin-bottom: 0.5rem; }
.how-card p { color: var(--muted); font-size: 0.95rem; }

/* Demos */
.demo-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap: 1rem; margin-top: 2rem; }
.demo-card { aspect-ratio: 16/9; overflow: hidden; }
.demo-ph {
  height: 100%; display: flex; flex-direction: column; align-items: center; justify-content: center;
  gap: 0.6rem; font-size: 2rem; color: var(--muted);
  background: linear-gradient(160deg, rgba(var(--accent-rgb), 0.08), transparent 60%);
}
.demo-ph span { font-size: 0.85rem; text-align: center; padding: 0 1rem; }
.demo-cta { text-align: center; color: var(--muted); margin-top: 1.5rem; }

/* Pricing */
.price-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap: 1rem; align-items: start; margin-top: 2rem; }
.price-card { padding: 1.8rem 1.6rem; text-align: center; position: relative; }
.price-featured { border-color: var(--accent); background: var(--glass-bg-strong); transform: scale(1.03); }
.price-badge {
  position: absolute; top: -12px; left: 50%; transform: translateX(-50%);
  background: var(--accent); color: #fff; font-size: 0.72rem; font-weight: 700;
  letter-spacing: 0.06em; text-transform: uppercase; padding: 4px 12px; border-radius: 99px;
}
.price-card h3 { font-size: 1.4rem; }
.price-target { color: var(--muted); font-size: 0.85rem; margin: 0.2rem 0 1rem; }
.price-amount { font-family: var(--font-title); font-size: 2.4rem; font-weight: 700; }
.price-amount span { font-size: 0.95rem; color: var(--muted); font-family: var(--font-body); font-weight: 400; }
.price-card ul { list-style: none; margin: 1.2rem 0 1.5rem; text-align: left; }
.price-card li { padding: 0.4rem 0; font-size: 0.92rem; color: var(--muted); border-bottom: 1px solid rgba(255,255,255,0.05); }
.price-card li strong { color: var(--text); }
.price-card .btn { width: 100%; }
.pricing-note { text-align: center; color: var(--muted); font-size: 0.88rem; margin-top: 1.75rem; }

/* Founders */
.founders { margin-top: 4.5rem; padding: 2.5rem 1.75rem; text-align: center; border-color: var(--accent); }
.founders p { max-width: 600px; margin: 0.75rem auto 1.5rem; color: var(--muted); }
.founders p strong { color: var(--accent-hover); font-size: 1.1rem; }
.founders-note { font-size: 0.85rem; margin-top: 1rem; }

/* FAQ */
.faq details { margin-bottom: 0.75rem; padding: 1.1rem 1.4rem; }
.faq summary { cursor: pointer; font-weight: 600; }
.faq details p { color: var(--muted); margin-top: 0.7rem; font-size: 0.95rem; }

/* Footer */
.footer {
  border-top: 1px solid var(--glass-border);
  padding: 2.5rem 1.5rem 3rem; text-align: center;
  color: var(--muted); font-size: 0.85rem;
  background: rgba(8,10,16,0.6);
}
.footer p { margin: 0.3rem 0; }

@media (max-width: 640px) {
  .nav { padding: 0.85rem 1.1rem; gap: 0.6rem 1rem; }
  .nav-links { gap: 0.85rem; }
  .hero { padding-top: 3.5rem; }
  section { margin-top: 3rem; }
  .price-featured { transform: none; }
}