:root {
  --bg:#f6f7fb; --card:#ffffff; --accent:#1f6feb; --muted:#6b7280;
  --danger:#dc2626; font-family:system-ui,-apple-system,Segoe UI,Roboto,'Helvetica Neue',Arial;
}
body {
  margin:0; background:var(--bg); color:#111; padding:28px;
  display:flex; align-items:flex-start; justify-content:center;
}
.container {
  width:100%; max-width:880px; background:var(--card);
  border-radius:12px; box-shadow:0 8px 24px rgba(15,23,42,.08); padding:24px;
}
h1 { margin:0 0 6px; font-size:20px }
p.lead { margin:0 0 18px; color:var(--muted) }
form .row { display:flex; gap:12px; margin-bottom:12px; flex-wrap:wrap }
label { display:block; font-size:13px; margin-bottom:6px; color:var(--muted) }
input[type=text], input[type=email], input[type=number], select, textarea {
  width:100%; padding:10px; border:1px solid #e6e9ef; border-radius:8px; font-size:14px;
}
.col { flex:1 1 200px; min-width:180px; }
.full { flex:1 1 100%; }
.inline { display:flex; gap:8px }
.btn {
  background:var(--accent); color:#fff; padding:10px 14px; border-radius:8px; border:0; cursor:pointer;
}
.btn.secondary { background:#eef2ff; color:var(--accent); border:1px solid #dbeafe }
.summary {
  background:#fbfdfb; border:1px solid #eef6ec; padding:12px; border-radius:8px; margin-top:12px;
}
.error { color:var(--danger); font-size:13px; margin-top:6px }
footer { margin-top:18px; color:var(--muted); font-size:13px }
@media (max-width:600px){
  .row { flex-direction:column }
  .col { min-width:unset }
}