:root{
      --bg:#f2f7ff;
      --white:#ffffff;
      --text:#0f1724;
      --muted:#6b7280;
      --blue-700:#1e3a8a;
      --blue-500:#2563eb;
      --cta:#2563eb;
      --wave-dark:#15315a;
      --wave-mid:#2b6cb0;   
      --wave-light:#7fb3f5;
      --max-width:1200px;
    }

    *{box-sizing:border-box}
    html,body{height:100%;}
    body{
      margin:0;
      font-family:'Instrument Sans',system-ui,-apple-system,Segoe UI,Roboto,Helvetica,Arial,sans-serif;
      background:linear-gradient(180deg,var(--bg) 0%, #ffffff 55%);
      color:var(--text);
      -webkit-font-smoothing:antialiased;
      -moz-osx-font-smoothing:grayscale;
    }

    .page{
      min-height:100vh;
      display:flex;
      flex-direction:column;
      position:relative;
      overflow:hidden;
    }

    /* Header */
    header{
      width:100%;
      background:var(--white);
      box-shadow:0 2px 8px rgba(15,23,36,0.06);
      position:sticky;
      top:0;
      z-index:50;
    }
    .container{
      max-width:var(--max-width);
      margin:0 auto;
      padding:1rem 1.25rem;
      display:flex;
      align-items:center;
      justify-content:space-between;
      gap:1rem;
    }
    .brand{display:flex;align-items:center;gap:0.75rem;}
    .brand img{height:44px;width:auto;display:block;}
    .brand span{font-weight:600;color:var(--blue-700);font-size:1.125rem;letter-spacing:0.1px}

    nav ul{display:flex;gap:1.25rem;align-items:center;margin:0;padding:0;list-style:none}
    nav a{color:#1f2937;text-decoration:none;font-weight:500;font-size:0.95rem}
    .btn-cta{
      background:var(--cta);
      color:white;
      padding:0.55rem 0.9rem;
      border-radius:10px;
      text-decoration:none;
      font-weight:600;
      box-shadow:0 6px 18px rgba(37,99,235,0.18);
      font-size:0.95rem;
    }

    /* Hero */
    .hero{
      position:relative;
      z-index:40;
      width:100%;
      max-width:var(--max-width);
      margin:2rem auto 0;
      padding:2.5rem 1.25rem 9rem;
      display:grid;
      grid-template-columns:1fr 420px;
      gap:1.5rem;
      align-items:center;
    }
    .title{
      font-size:2.6rem;
      line-height:1.04;
      margin:0 0 0.75rem;
      color:var(--blue-700);
      font-weight:700;
      letter-spacing:-0.6px;
    }
    .lead{
      color:var(--muted);
      font-size:1rem;
      margin:0 0 1.5rem;
      max-width:560px;
    }
    .primary{
      display:inline-block;
      background:var(--blue-500);
      color:white;
      padding:0.89rem 1.25rem;
      border-radius:10px;
      font-weight:900;
      text-align: center;
      text-decoration:none;
      width: 150px;
      box-shadow:0 8px 20px rgba(59,130,246,0.14);
    }

    /* Robot block */
    .hero-right{
      display:flex;
      align-items:center;
      justify-content:center;
      position:relative;
    }
    .robot-wrap{
      width:380px;
      height:380px;
      border-radius:999px;
      background:linear-gradient(180deg, rgba(255, 255, 255, 1), rgba(255, 255, 255, 1));
      display:flex;
      align-items:center;
      justify-content:center;
      box-shadow:0 20px 50px rgba(37,99,235,0.08);
      overflow:hidden;
    }
    .robot{width:68%;height:auto;display:block;}

    /* Vagues statiques */
    .waves{
      position:absolute;
      left:0;
      right:0;
      bottom:0;
      height:280px;
      z-index:10;   
      pointer-events:none;
    }
    .wave-svg{
      position:absolute;
      left:0;
      bottom:0;
      width:100%;
      height:100%;
      display:block;
    }

    /* Footer */
    footer{
      width:100%;
      background:var(--white);
      border-top:1px solid rgba(15,23,36,0.06);
      padding:1rem 0;
      text-align:center;
      color:#64748b;
      font-size:0.9rem;
      z-index:20; 
    }

    /* Responsive */
    @media (max-width:980px){
      .hero{grid-template-columns:1fr 320px; padding-bottom:9.5rem;}
      .robot-wrap{width:320px;height:320px}
    }
    @media (max-width:720px){
      .container{padding:0.85rem}
      nav ul{display:none}
      .hero{grid-template-columns:1fr; gap:2rem; padding:3rem 1rem 11rem;}
      .hero-right{justify-content:flex-end}
      .robot-wrap{width:260px;height:260px;margin-left:auto}
      .title{font-size:2rem}
    }