* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
  color: #0f172a;
  background: #f8fafc;
}

.container {
  max-width: 720px;
  margin: 40px auto;
  padding: 24px;
}

.card {
  background: #ffffff;
  border: 1px solid #e2e8f0;
  border-radius: 12px;
  padding: 20px;
}

h1 {
  margin-top: 0;
  font-size: 1.5rem;
}

p {
  line-height: 1.5;
}

label {
  display: block;
  font-weight: 600;
  margin-bottom: 6px;
}

input {
  width: 100%;
  padding: 10px;
  border: 1px solid #cbd5e1;
  border-radius: 8px;
  margin-bottom: 14px;
}

button {
  border: 0;
  background: #0f172a;
  color: #ffffff;
  border-radius: 8px;
  padding: 10px 14px;
  cursor: pointer;
}

button:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

.status {
  margin-top: 16px;
  padding: 10px;
  background: #f1f5f9;
  border-radius: 8px;
}

.error {
  color: #b91c1c;
}

.success {
  color: #166534;
}

.muted {
  color: #475569;
}

.code {
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, 'Liberation Mono', 'Courier New', monospace;
  background: #e2e8f0;
  border-radius: 6px;
  padding: 2px 6px;
}