:root{
  --bg: #0b1220;
  --card: rgba(255,255,255,0.06);
  --border: rgba(255,255,255,0.12);
  --text: rgba(255,255,255,0.88);
  --muted: rgba(255,255,255,0.65);
  --accent: #6ee7ff;
  --accent2: #a78bfa;
  --shadow: 0 20px 60px rgba(0,0,0,0.45);
  --radius: 18px;
  --max: 1100px;
}

*{ box-sizing: border-box; }
html{ scroll-behavior: smooth; }
body{
  margin: 0;
  font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, "Apple Color Emoji","Segoe UI Emoji";
  color: var(--text);
  background: radial-gradient(1200px 600px at 20% 10%, rgba(110,231,255,0.20), transparent 55%),
              radial-gradient(1000px 600px at 80% 15%, rgba(167,139,250,0.18), transparent 55%),
              radial-gradient(900px 600px at 50% 90%, rgba(34,197,94,0.10), transparent 60%),
              var(--bg);
  line-height: 1.5;
}

a{ color: inherit; text-decoration: none; }
.container{ width: min(var(--max), calc(100% - 40px)); margin: 0 auto; }

/* Top bar */
header{
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(11,18,32,0.70);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--border);
}
.nav{
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 0;
  gap: 14px;
}
.brand{
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 750;
  letter-spacing: 0.2px;
}
.logo{
  width: 36px; height: 36px;
  border-radius: 12px;
  background: linear-gradient(135deg, var(--accent), var(--accent2));
  box-shadow: 0 10px 30px rgba(110,231,255,0.22);
}
nav ul{
  display: flex;
  gap: 18px;
  list-style: none;
  padding: 0;
  margin: 0;
  align-items: center;
}
nav a{
  color: var(--muted);
  font-weight: 600;
  font-size: 14px;
  padding: 10px 10px;
  border-radius: 12px;
  transition: 160ms ease;
}
nav a:hover{ color: var(--text); background: rgba(255,255,255,0.06); }

.cta{
  display: flex;
  align-items: center;
  gap: 10px;
}
.btn{
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 11px 14px;
  border-radius: 14px;
  border: 1px solid var(--border);
  background: rgba(255,255,255,0.06);
  color: var(--text);
  font-weight: 700;
  font-size: 14px;
  transition: 160ms ease;
  cursor: pointer;
  user-select: none;
}
.btn:hover{ transform: translateY(-1px); background: rgba(255,255,255,0.09); }
.btn.primary{
  border: 0;
  background: linear-gradient(135deg, var(--accent), var(--accent2));
  color: #08101f;
  box-shadow: 0 18px 50px rgba(110,231,255,0.18);
}
.btn.primary:hover{ filter: brightness(1.05); }

.burger{
  display: none;
  width: 44px; height: 44px;
  border-radius: 14px;
  border: 1px solid var(--border);
  background: rgba(255,255,255,0.06);
  color: var(--text);
  cursor: pointer;
}

/* Hero */
.hero{ padding: 72px 0 24px; }
.hero-grid{
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 26px;
  align-items: center;
}
.pill{
  display: inline-flex;
  gap: 10px;
  align-items: center;
  padding: 8px 12px;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: rgba(255,255,255,0.05);
  color: var(--muted);
  font-weight: 650;
  font-size: 13px;
}
.pill .dot{
  width: 8px; height: 8px;
  border-radius: 999px;
  background: linear-gradient(135deg, var(--accent), var(--accent2));
  box-shadow: 0 0 0 4px rgba(110,231,255,0.12);
}
h1{
  margin: 14px 0 10px;
  font-size: clamp(32px, 4.6vw, 52px);
  line-height: 1.05;
  letter-spacing: -0.5px;
}
.sub{
  margin: 0 0 20px;
  color: var(--muted);
  font-size: 16px;
  max-width: 60ch;
}
.hero-actions{ display: flex; gap: 12px; flex-wrap: wrap; margin-top: 18px; }

.stats{
  margin-top: 22px;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
}
.stat{
  padding: 14px;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  background: rgba(255,255,255,0.05);
}
.stat b{ font-size: 18px; }
.stat span{ display: block; color: var(--muted); font-size: 13px; margin-top: 4px; }

.hero-card{
  border-radius: 24px;
  border: 1px solid var(--border);
  background: linear-gradient(180deg, rgba(255,255,255,0.06), rgba(255,255,255,0.03));
  box-shadow: var(--shadow);
  padding: 18px;
  position: relative;
  overflow: hidden;
  min-height: 330px;
}
.hero-card::before{
  content:"";
  position:absolute;
  inset:-120px -120px auto auto;
  width: 320px; height: 320px;
  background: radial-gradient(circle at 30% 30%, rgba(110,231,255,0.55), transparent 55%);
  transform: rotate(20deg);
  filter: blur(8px);
  opacity: 0.65;
}
.hero-card::after{
  content:"";
  position:absolute;
  inset:auto auto -140px -140px;
  width: 340px; height: 340px;
  background: radial-gradient(circle at 40% 40%, rgba(167,139,250,0.48), transparent 58%);
  filter: blur(10px);
  opacity: 0.55;
}
.hero-card .inner{
  position: relative;
  z-index: 1;
  display: grid;
  gap: 12px;
}
.kpi{
  padding: 14px;
  border-radius: 18px;
  border: 1px solid rgba(255,255,255,0.10);
  background: rgba(8,16,31,0.40);
}
.kpi .label{ color: var(--muted); font-size: 12px; font-weight: 650; }
.kpi .value{ font-size: 18px; font-weight: 800; margin-top: 6px; }
.kpi .hint{ color: var(--muted); font-size: 12px; margin-top: 6px; }

/* Sections */
section{ padding: 56px 0; }
.section-title{
  display:flex;
  align-items:flex-end;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 18px;
}
.section-title h2{
  margin: 0;
  font-size: 26px;
  letter-spacing: -0.3px;
}
.section-title p{
  margin: 0;
  color: var(--muted);
  max-width: 60ch;
  font-size: 14px;
}

.grid-3{
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
}
.card{
  padding: 18px;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  background: rgba(255,255,255,0.05);
  transition: 160ms ease;
}
.card:hover{ transform: translateY(-2px); background: rgba(255,255,255,0.07); }
.icon{
  width: 44px; height: 44px;
  border-radius: 16px;
  background: rgba(255,255,255,0.06);
  border: 1px solid rgba(255,255,255,0.10);
  display: grid;
  place-items: center;
  font-size: 18px;
  margin-bottom: 12px;
}
.card h3{ margin: 0 0 6px; font-size: 16px; }
.card p{ margin: 0; color: var(--muted); font-size: 14px; }

.split{
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
  align-items: start;
}

.list{
  margin: 12px 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 10px;
}
.list li{
  display: grid;
  grid-template-columns: 18px 1fr;
  gap: 10px;
  align-items: start;
  color: var(--muted);
  font-size: 14px;
}
.check{
  width: 18px; height: 18px;
  border-radius: 8px;
  background: linear-gradient(135deg, var(--accent), var(--accent2));
  display: grid;
  place-items:center;
  color: #08101f;
  font-weight: 900;
  font-size: 12px;
  margin-top: 2px;
}

/* Contact */
form{
  display: grid;
  gap: 10px;
  margin-top: 10px;
}
.field{
  display: grid;
  gap: 6px;
}
label{ font-size: 13px; color: var(--muted); font-weight: 650; }
input, textarea{
  width: 100%;
  padding: 12px 12px;
  border-radius: 14px;
  border: 1px solid var(--border);
  background: rgba(8,16,31,0.38);
  color: var(--text);
  outline: none;
  transition: 160ms ease;
}
input:focus, textarea:focus{
  border-color: rgba(110,231,255,0.55);
  box-shadow: 0 0 0 4px rgba(110,231,255,0.12);
}
textarea{ min-height: 120px; resize: vertical; }

/* Footer */
footer{
  padding: 26px 0 40px;
  border-top: 1px solid var(--border);
  color: var(--muted);
}
.footer-row{
  display: flex;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
  align-items: center;
}
.small{ font-size: 13px; }

/* Mobile */
/* Menu mobile : caché par défaut (desktop + mobile tant que pas ouvert) */
.mobile-menu{
  display:none;
  padding: 0 0 14px;
}

/* Mobile */
@media (max-width: 900px){
  .hero-grid{ grid-template-columns: 1fr; }
  .grid-3{ grid-template-columns: 1fr; }
  .split{ grid-template-columns: 1fr; }
  nav ul{ display:none; }   
  .burger{ display:inline-grid; place-items:center; }

  /* visible uniquement quand ouvert */
  .mobile-menu.open{ display:block; }

  .mobile-menu a{
    display:block;
    padding: 12px 10px;
    border-radius: 12px;
    color: var(--muted);
    border: 1px solid transparent;
  }
  .mobile-menu a:hover{
    color: var(--text);
    background: rgba(255,255,255,0.05);
    border-color: rgba(255,255,255,0.08);
  }

  .stats{ grid-template-columns: 1fr; }
}
button:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}