:root{
  --bg:#0b1020;
  --panel:#0f162d;
  --card:#121a35;
  --text:#ecf2ff;
  --muted:#9db0d3;
  --brand:#6aa8ff;
  --brand-2:#7fd9ff;
  --ring:#2743a0;
}

*{box-sizing:border-box}
html,body{margin:0;background:var(--bg);color:var(--text);font-family:system-ui,-apple-system,Segoe UI,Inter,Arial,sans-serif}
a{color:inherit;text-decoration:none}
.container{max-width:1100px;margin:0 auto;padding:0 24px}

.h1{font-size:clamp(32px,5vw,56px);line-height:1.1;margin:0 0 12px}
.h2{font-size:clamp(22px,3vw,32px);margin:0 0 8px}
.lead{color:var(--muted);font-size:1.125rem}
.small{font-size:.875rem}
.muted{color:var(--muted)}
.rule{border:0;border-top:1px solid rgba(255,255,255,.07);margin:20px 0}

/* Header */
.site-header{
  position:sticky;top:0;z-index:10;
  backdrop-filter:saturate(140%) blur(10px);
  background:linear-gradient(180deg,rgba(15,22,45,.9),rgba(15,22,45,.6));
  border-bottom:1px solid rgba(255,255,255,.07);
}
.header-inner{display:flex;align-items:center;justify-content:space-between;height:64px}
.brand{display:flex;gap:10px;align-items:center;font-weight:700}
.brand img.logo{height:18px;display:block}
.nav a{color:var(--muted);margin-left:18px}
.nav a:hover{color:#fff}

/* Hero split */
.hero{display:grid;grid-template-columns:1.3fr 1fr;gap:28px;padding:64px 24px 32px}
.hero-card{display:flex;align-items:center;justify-content:center}
.card{
  background:linear-gradient(180deg,rgba(18,26,53,.9),rgba(18,26,53,.7));
  border:1px solid rgba(255,255,255,.08);
  border-radius:16px;overflow:hidden;width:min(420px,90%);
  box-shadow:0 20px 50px rgba(0,0,0,.35);
}
.card-head{padding:14px 16px;border-bottom:1px solid rgba(255,255,255,.06);font-weight:600}
.preview{position:relative;aspect-ratio:4/3;display:grid;place-items:center;overflow:hidden}
.preview-ring{
  width:75%;aspect-ratio:1;border-radius:999px;
  background:radial-gradient(closest-side,rgba(127,217,255,.25),transparent 70%);
  border:1px solid rgba(127,217,255,.25);
  box-shadow:0 0 80px rgba(106,168,255,.25) inset;
}
.preview-gauge{
  position:absolute;width:40%;height:12px;border-radius:12px;
  background:linear-gradient(90deg,#ff6a6a,#ffd36a,#6aff9d);
  filter:drop-shadow(0 0 10px rgba(106,168,255,.3));
}

/* Sections & cards */
.section{padding:28px 0}
.card.section{padding:18px;border-radius:16px;background:var(--card);border:1px solid rgba(255,255,255,.08)}

/* Buttons */
.btn{
  appearance:none;border:1px solid rgba(255,255,255,.2);background:#141b3d;color:#fff;
  padding:10px 14px;border-radius:12px;cursor:pointer;display:inline-block
}
.btn:hover{filter:brightness(1.15)}
.btn.primary{background:linear-gradient(90deg,var(--brand),var(--brand-2));border-color:transparent}

/* Apps grid & cards */
.apps-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:14px}
.app-card{background:#0f1631;border:1px solid rgba(255,255,255,.08);border-radius:12px;padding:14px 16px}
.app-card h3{margin:0 0 6px;font-size:1.1rem}
.badge{display:inline-block;padding:4px 8px;border-radius:999px;background:#0e1430;border:1px solid rgba(255,255,255,.12);font-size:.8rem;color:var(--muted)}

/* Contact chips */
.chips{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:14px}
.chip{
  display:flex;align-items:center;gap:12px;padding:12px 14px;border-radius:12px;
  border:1px solid rgba(255,255,255,.12);background:#0e1430
}
.chip .icon{width:22px;height:22px;display:grid;place-items:center;border-radius:6px;background:#141b3d}

/* BMI page form */
.legend{color:var(--muted);margin-bottom:6px}
.row{display:flex;align-items:center;gap:12px}
.row-gap{margin:10px 0 6px}
.grid{display:grid;gap:12px}
.grid.two{grid-template-columns:repeat(2,minmax(0,1fr))}
.grid.three{grid-template-columns:repeat(3,minmax(0,1fr))}
.field .label{display:block;color:var(--muted);margin-bottom:6px}
.field input{
  width:100%;padding:12px;border-radius:12px;border:1px solid rgba(255,255,255,.12);
  outline:0;background:#0e1430;color:#fff;
}
.field input:focus{border-color:var(--brand);box-shadow:0 0 0 3px rgba(106,168,255,.25)}
.result-item{background:#0f1631;border:1px solid rgba(255,255,255,.08);border-radius:12px;padding:12px 14px}
.result-label{color:var(--muted);font-size:.9rem}
.result-value{font-size:1.8rem;font-weight:700}
.result-badge{display:inline-block;padding:6px 10px;border-radius:999px;background:#0e1430;border:1px solid rgba(255,255,255,.12)}
.results{display:grid;grid-template-columns:repeat(2,1fr);gap:12px;margin-top:14px}

/* Footer */
.site-footer{border-top:1px solid rgba(255,255,255,.07);margin-top:48px}
.footer-inner{display:flex;align-items:center;justify-content:space-between;height:64px}

/* Responsive */
@media (max-width:880px){
  .hero{grid-template-columns:1fr}
  .grid.two{grid-template-columns:1fr}
}