/* Simple responsive styling */
:root{
  --max-w: 820px;
  --accent: #1e88e5;
  --muted: #666;
}
*{box-sizing:border-box}
body{font-family:system-ui,-apple-system,Segoe UI,Roboto,"Helvetica Neue",Arial;line-height:1.5;margin:0;color:#111}
.container{max-width:var(--max-w);margin:28px auto;padding:0 16px}
.hero{background:linear-gradient(90deg,#f0f8ff,#ffffff);padding:36px 16px;text-align:center}
.hero h1{margin:0 0 8px;font-size:28px}
.hero p{margin:0 0 16px;color:var(--muted)}
.btn{display:inline-block;background:var(--accent);color:#fff;padding:10px 16px;border-radius:10px;text-decoration:none;border:none;cursor:pointer}
.btn:hover{opacity:.95}
.signup{margin-top:18px;padding:12px;border:1px solid #eee;border-radius:8px;background:#fafafa}
label{display:block;margin:12px 0;font-weight:600}
input[type="email"],select{width:100%;padding:10px;border-radius:8px;border:1px solid #ddd}
.checkboxes label{display:inline-block;margin-right:10px;font-weight:400}
.muted{color:var(--muted);font-size:14px}
footer{text-align:center;padding:20px;color:var(--muted)}
.survey{padding:24px 16px}
.reward{font-family:monospace;background:#f7f7f7;padding:12px;border-radius:8px;border:1px dashed #ddd;display:inline-block;margin:12px 0}
@media (max-width:480px){
  .hero h1{font-size:22px}
  .btn{border-radius:8px}
}