* { box-sizing: border-box; }
body {
  margin: 0; min-height: 100vh; display: grid; place-items: center;
  padding: 22px; background: #f2f5f9; color: #1f2937;
  font-family: Tahoma, Arial, sans-serif;
}
.card {
  width: min(100%, 540px); padding: 30px; background: white;
  border-radius: 16px; box-shadow: 0 12px 34px rgba(0,0,0,.08);
}
h1 { margin-top: 0; }
p { line-height: 1.8; color: #4b5563; }
label { display: block; margin: 16px 0 8px; font-weight: bold; }
input:not([type=checkbox]), textarea {
  width: 100%; border: 1px solid #cbd5e1; border-radius: 9px;
  padding: 12px; font: inherit;
}
.consent { display: flex; gap: 10px; align-items: flex-start; font-weight: normal; line-height: 1.7; }
button {
  width: 100%; margin-top: 18px; padding: 13px; border: 0;
  border-radius: 9px; background: #2563eb; color: white;
  font: inherit; font-weight: bold; cursor: pointer;
}
button:hover { background: #1d4ed8; }
.error { color: #b91c1c; background: #fef2f2; padding: 10px; border-radius: 8px; }
.center { text-align: center; }
.spinner {
  width: 42px; height: 42px; margin: 8px auto 22px;
  border: 4px solid #dbeafe; border-top-color: #2563eb;
  border-radius: 50%; animation: spin .9s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }