body {
  font-family: system-ui, -apple-system, Segoe UI, sans-serif;
  margin: 0;
  padding: 2rem 1rem;
  background: #f4f5f7;
  color: #1a1a1a;
}
main {
  max-width: 22rem;
  margin: 0 auto;
  background: #fff;
  padding: 1.5rem 1.5rem 2rem;
  border-radius: 12px;
  box-shadow: 0 2px 8px rgba(0, 0, 0, .06);
}
h1 { margin: 0 0 .5rem; font-size: 1.25rem; }
p { margin: .25rem 0 1rem; color: #555; }
label { display: block; margin: .75rem 0; font-size: .9rem; color: #333; }
input {
  display: block;
  width: 100%;
  margin-top: .25rem;
  padding: .5rem;
  border: 1px solid #c0c4cc;
  border-radius: 6px;
  font-size: 1rem;
  box-sizing: border-box;
}
button {
  width: 100%;
  margin-top: 1rem;
  padding: .6rem;
  background: #1d4ed8;
  color: #fff;
  border: 0;
  border-radius: 6px;
  font-size: 1rem;
  cursor: pointer;
}
button:hover { background: #1e40af; }
.error {
  padding: .5rem .75rem;
  background: #fee2e2;
  color: #991b1b;
  border-radius: 6px;
  font-size: .9rem;
  margin-bottom: .75rem;
}
.meta {
  margin-top: 1rem;
  font-size: .75rem;
  color: #888;
  font-family: monospace;
}