:root{
  --bg:#0b0f14;
  --card:#101720;
  --muted:#62708a;
  --txt:#e6eef8;
  --brand:#30c48d;
  --brand-2:#7cc6ff;
  --border:#1d2732;
}

*{box-sizing:border-box}
html,body{margin:0;padding:0;background:var(--bg);color:var(--txt);font-family:Inter,system-ui,Segoe UI,Roboto,Arial,sans-serif}
img{max-width:100%;display:block}

.container{max-width:1100px;margin:0 auto;padding:16px}
.header{
  display:flex;align-items:center;justify-content:space-between;gap:12px;
  padding:12px 0;
}
.brand{display:flex;align-items:center;gap:10px}
.brand .logo{
  width:38px;height:38px;border-radius:10px;background:linear-gradient(135deg,var(--brand),var(--brand-2));
  box-shadow:0 8px 28px rgba(48,196,141,.35);
}
.brand h1{font-size:18px;margin:0;font-weight:700;letter-spacing:.3px}
.header .actions{display:flex;gap:8px}
.btn{
  appearance:none;border:1px solid var(--border);background:var(--card);color:var(--txt);
  padding:10px 14px;border-radius:12px;cursor:pointer;font-weight:600;transition:.2s;
}
.btn:hover{transform:translateY(-1px);border-color:#263445}
.btn.primary{background:linear-gradient(135deg,var(--brand),var(--brand-2));border:0;color:#08121b}

.grid{
  display:grid;gap:16px;
  grid-template-columns:1fr;
}
@media(min-width:900px){
  .grid{grid-template-columns:1.1fr .9fr}
}

.card{
  background:var(--card);border:1px solid var(--border);border-radius:18px;padding:16px;
  box-shadow:0 10px 30px rgba(0,0,0,.18);
}

.preview{
  display:grid;gap:12px;
  grid-template-columns:1fr 1fr;
}
.preview-item{
  background:#0e1520;border:1px dashed #203045;border-radius:14px;padding:10px;
  display:flex;align-items:center;justify-content:center;aspect-ratio:4/3;
}

.controls{display:grid;gap:12px}
.control{display:grid;gap:8px}
label{font-size:14px;color:#b9c7d9}
.select{
  width:100%;padding:12px 14px;border-radius:12px;border:1px solid var(--border);background:#0f1622;color:var(--txt);
  outline:none;font-weight:600;
}

.price-line{
  display:flex;align-items:center;justify-content:space-between;background:#0e1620;border:1px solid var(--border);
  padding:12px 14px;border-radius:12px;font-weight:700
}

.footer-actions{
  position:sticky;bottom:0;left:0;right:0;background:linear-gradient(180deg, rgba(11,15,20,0) 0%, rgba(11,15,20,0.85) 30%, rgba(11,15,20,1) 100%);
  padding:16px;margin-top:12px;
}
.cta{
  display:flex;gap:10px;flex-wrap:wrap;align-items:center;justify-content:space-between;background:#0f1825;border:1px solid var(--border);
  padding:12px 14px;border-radius:16px;
}
.total{font-size:18px;font-weight:800;letter-spacing:.3px}
.badge{font-size:12px;color:#9fb2c9;background:#0d2334;padding:6px 10px;border-radius:999px;border:1px solid #1a3147}

.modal-backdrop{position:fixed;inset:0;background:rgba(0,0,0,.5);display:none;align-items:center;justify-content:center;padding:16px;z-index:50}
.modal{background:var(--card);border:1px solid var(--border);border-radius:18px;max-width:720px;width:100%;padding:16px}
.modal h3{margin:0 0 10px 0}
.modal .close{float:right;cursor:pointer;background:transparent;border:0;color:#9fb2c9;font-weight:900;font-size:18px}

.small{font-size:12px;color:#9fb2c9}
hr{border:0;border-top:1px solid var(--border);margin:8px 0}