*{box-sizing:border-box}html,body{margin:0;padding:0}body{font-family:Inter,system-ui,-apple-system,Segoe UI,Roboto,Ubuntu,sans-serif;color:#0f172a;background:#f8fafc}
a{color:inherit;text-decoration:none}
.container{max-width:980px;margin:0 auto;padding:16px}
header{display:flex;align-items:center;justify-content:space-between;background:#fff;border-bottom:1px solid #e2e8f0;position:sticky;top:0;z-index:10}
.brand{display:flex;gap:10px;align-items:center}
nav a{margin-left:16px;color:#334155}
.hero{padding:56px 16px 40px}
.hero h1{font-size:42px;line-height:1.1;margin:0 0 12px}
.sub{font-size:18px;color:#475569;margin:0 0 20px}
.cta{display:inline-block;background:#16a34a;color:#fff;padding:12px 18px;border-radius:999px;font-weight:600}
.cta:hover{opacity:.9}
.note{color:#64748b;margin-top:8px}
.features{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:16px;padding:24px 16px}
.card{background:#fff;border:1px solid #e2e8f0;border-radius:12px;padding:16px}
.steps{padding:24px 16px}
footer{padding:24px 16px;color:#64748b}
/* Base */
*{box-sizing:border-box}
html,body{margin:0;padding:0}
body{font-family:Inter,system-ui,-apple-system,Segoe UI,Roboto,Ubuntu,sans-serif;color:#0f172a;background:#f8fafc}
a{color:inherit;text-decoration:none}
.container{max-width:980px;margin:0 auto;padding:16px}

/* Header & Nav */
.site-header{
  display:flex;align-items:center;justify-content:space-between;
  background:#fff;border-bottom:1px solid #e2e8f0;position:sticky;top:0;z-index:20
}
.brand-link{display:flex;gap:10px;align-items:center}
.nav-toggle{
  display:none;background:#fff;border:1px solid #e2e8f0;border-radius:8px;
  padding:8px 10px;font-size:18px;cursor:pointer
}
.nav{display:block}
.nav-list{list-style:none;display:flex;gap:14px;align-items:center;margin:0;padding:0}
.nav-item>a, .submenu-toggle{
  font-family: inherit;
  font-size: 16px;
  font-weight: 500;   /* poids par défaut du menu */
  line-height: 1;
  color: #0f172a;
  padding: 10px 14px;
  border-radius: 10px;
  display: flex;
  align-items: center;
  gap: 8px;
  text-decoration: none;
}
}
.nav-item>a:hover,.submenu-toggle:hover{background:#eef2f7}
.has-submenu{position:relative}
.submenu{
  position:absolute;top:100%;left:0;min-width:200px;margin-top: 0;padding:8px;
  background:#fff;border:1px solid #e2e8f0;border-radius:12px;box-shadow:0 10px 30px rgba(2,8,23,.08);
  display:none;
  list-style: none;
padding-left: 0;
}
.submenu.open{display:block}
.has-submenu:hover .submenu{display:block}
.submenu a{display:block;padding:10px 12px;border-radius:8px;color:#0f172a}
.submenu a:hover{background:#f1f5f9}
.submenu-toggle{background: transparent;border: 0;cursor: pointer;appearance: none;-webkit-appearance: none;}
.chev{font-size:12px}

/* Hero */
.hero{padding:56px 16px 40px}
.hero h1{font-size:42px;line-height:1.1;margin:0 0 12px}
.sub{font-size:18px;color:#475569;margin:0 0 20px}
.cta{display:inline-block;background:#16a34a;color:#fff;padding:12px 18px;border-radius:999px;font-weight:600}
.cta:hover{opacity:.9}
.note{color:#64748b;margin-top:8px}

/* Features */
.features{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:16px;padding:24px 16px}
.card{background:#fff;border:1px solid #e2e8f0;border-radius:12px;padding:16px}

/* Steps */
.steps{padding:24px 16px}

/* Footer */
.site-footer{padding:24px 16px;color:#64748b}

/* Responsive */
@media (max-width: 860px){
  .nav-toggle{display:inline-block}
  .nav{display:none;position:absolute;top:64px;left:0;right:0;background:#fff;border-bottom:1px solid #e2e8f0}
  .nav.open{display:block}
  .nav-list{flex-direction:column;align-items:stretch;padding:8px}
  .has-submenu:hover .submenu{display:none} /* sur mobile, on utilise le clic */
  .submenu{position:static;box-shadow:none;border:0;margin:0;padding:0;display:none}
  .submenu.open{display:block}
  .submenu a{padding:10px 10px 10px 28px}
}