*{box-sizing:border-box}
body{font-family:system-ui,-apple-system,Segoe UI,Roboto,Arial,sans-serif;margin:0;background:#F7F8FA;color:#1E2430;line-height:1.7;font-size:17px}
nav{background:#0F2040;padding:12px 16px;display:flex;flex-wrap:wrap;gap:8px;align-items:center}
nav a{color:#fff;text-decoration:none;padding:10px 12px;min-height:44px;display:inline-flex;align-items:center;border-radius:6px}
nav a:hover,nav a:focus{background:#0E9A8B;outline:2px solid #F5A623}
main{max-width:820px;margin:0 auto;padding:24px 20px}
h1{color:#0F2040;font-size:2rem;line-height:1.25}
h2{color:#0F2040;font-size:1.4rem;line-height:1.3;margin-top:32px}
h3{color:#0F2040}
a{color:#0B6B5E}
a:focus{outline:2px solid #F5A623;outline-offset:2px}
ul,ol{padding-left:22px}
li{margin-bottom:8px}
section,article{background:#fff;border:1px solid #e2e6ec;border-radius:10px;padding:20px;margin:20px 0}
footer{background:#0F2040;color:#fff;padding:24px 20px;margin-top:40px}
footer a{color:#fff;padding:6px 2px}
label{display:block;margin-top:12px;font-weight:600}
input,textarea,select{width:100%;padding:12px;margin-top:6px;box-sizing:border-box;font-size:16px;border:1px solid #ccc;border-radius:6px}
button{background:#0E9A8B;color:#fff;border:0;padding:12px 20px;min-height:44px;margin-top:14px;cursor:pointer;font-size:16px;border-radius:6px}
button:hover,button:focus{background:#0B6B5E;outline:2px solid #F5A623}
#result,#output{background:#fff;border:1px solid #ddd;padding:14px;margin-top:14px;white-space:pre-wrap;border-radius:6px}
.no-promise{color:#F5A623}
.zynex-promo{background:#0F2040;color:#fff;border-radius:10px;padding:20px}
.zynex-promo a{color:#F5A623}
@media (max-width:700px){
  body{font-size:16px}
  main{padding:16px 14px}
  h1{font-size:1.6rem}
  h2{font-size:1.25rem}
  nav{padding:8px}
  nav a{padding:10px 8px}
  section,article{padding:16px 14px}
}
@media (max-width:400px){
  h1{font-size:1.4rem}
  button{width:100%}
}