:root{
  --bg: #ffffff;
  --accent: #2b9cff;
  --muted:#6b7280;
  --card:#f8fbff;
  --radius:14px;
  --max-width:1100px;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial;
}

*{box-sizing:border-box}
body{
  margin:0;
  background:linear-gradient(180deg,#fbfdff 0%, #ffffff 100%);
  color:#0f1724;
  -webkit-font-smoothing:antialiased;
  -moz-osx-font-smoothing:grayscale;
  line-height:1.45;
  padding:32px;
  display:flex;
  justify-content:center;
  font-size:16px;
}
.wrap{width:100%; max-width:var(--max-width);}

/* Header */
header{display:flex;align-items:center;justify-content:space-between;gap:20px;margin-bottom:28px}
.brand{display:flex;gap:14px;align-items:center;text-decoration:none;color:inherit}
.logo{width:56px;height:56px;background:linear-gradient(135deg,var(--accent),#65c7ff);border-radius:12px;display:flex;align-items:center;justify-content:center;color:white;font-weight:700;font-size:20px;box-shadow:0 6px 18px rgba(43,156,255,0.18)}
nav a{color:var(--muted);margin-left:18px;text-decoration:none}
.cta{background:var(--accent);color:#fff;padding:10px 16px;border-radius:10px;text-decoration:none;font-weight:600;box-shadow:0 6px 18px rgba(43,156,255,0.18)}

/* Hero */
.hero{display:grid;grid-template-columns:1fr 380px;gap:28px;align-items:center;margin-bottom:36px}
.hero-card{background:var(--card);border-radius:var(--radius);padding:28px;box-shadow:0 8px 30px rgba(12,22,40,0.05);border:1px solid rgba(43,156,255,0.06)}
.h-title{font-size:28px;margin:0 0 8px 0}
.h-sub{margin:0 0 18px 0;color:var(--muted)}
.features-grid{display:flex;gap:12px;flex-wrap:wrap}
.feature{background:#fff;padding:12px 14px;border-radius:10px;border:1px solid rgba(15,23,36,0.04);min-width:120px;display:flex;gap:10px;align-items:center}
.feature svg{width:22px;height:22px;opacity:0.95}

/* Right column: interactive */
.panel{background:#fff;padding:18px;border-radius:12px;border:1px solid rgba(15,23,36,0.04)}
.price{font-size:22px;font-weight:700;margin-bottom:6px}
.sub-muted{color:var(--muted);font-size:14px;margin-bottom:12px}

/* Pricing table */
.pricing{display:flex;gap:12px;margin:18px 0}
.tier{flex:1;background:linear-gradient(180deg,#fff,#f6fbff);padding:14px;border-radius:12px;border:1px solid rgba(43,156,255,0.06)}
.tier h4{margin:0 0 8px 0}
.btn-choose{display:inline-block;margin-top:12px;padding:10px 12px;border-radius:10px;text-decoration:none;font-weight:600;border:1px solid rgba(43,156,255,0.12)}

/* Sections */
section{margin-bottom:28px}
h3{margin:0 0 10px 0}
p.lead{color:var(--muted);margin:6px 0 0 0}

/* Cards row */
.cards{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;margin-top:12px}
.card{background:#fff;padding:16px;border-radius:12px;border:1px solid rgba(15,23,36,0.04)}
.muted{color:var(--muted);font-size:14px}

/* Footer */
footer{padding:18px 0;color:var(--muted);font-size:14px;border-top:1px solid rgba(15,23,36,0.03);margin-top:20px}

/* Responsive */
@media (max-width:900px){
  .hero{grid-template-columns:1fr}
  .cards{grid-template-columns:1fr}
  header{flex-direction:column;align-items:flex-start;gap:14px}
}

/* small form */
.form-row{display:flex;gap:8px;align-items:center}
.form-row input[type="number"]{flex:1;padding:8px;border-radius:8px;border:1px solid rgba(15,23,36,0.06)}
.result{background:linear-gradient(90deg,#fff,#f6fbff);padding:10px;border-radius:10px;border:1px solid rgba(43,156,255,0.06);margin-top:10px}
.disclaimer{font-size:13px;color:#8b93a5;margin-top:8px}

/* Auth */
.auth-container{display:flex;gap:20px;flex-wrap:wrap;margin-top:16px}
.auth-box{background:var(--card);padding:16px;border-radius:12px;border:1px solid rgba(15,23,36,0.04);min-width:250px;flex:1}
.auth-box input{width:100%;padding:8px;margin-bottom:8px;border-radius:8px;border:1px solid rgba(15,23,36,0.06)}