* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  background: #f7f7f8;
  color: #1a1a1a;
}

main {
  max-width: 640px;
  margin: 0 auto;
  padding: 2rem 1rem 4rem;
}

h1 {
  font-size: 1.5rem;
}

.field {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
  margin-bottom: 1rem;
}

.field label {
  font-weight: 600;
  font-size: 0.9rem;
}

.field input,
.field textarea,
.field select {
  padding: 0.5rem;
  font-size: 1rem;
  border: 1px solid #ccc;
  border-radius: 6px;
}

.row {
  display: flex;
  gap: 1rem;
}

.row > .field {
  flex: 1;
}

button {
  padding: 0.6rem 1.2rem;
  font-size: 1rem;
  border-radius: 6px;
  border: none;
  background: #1a1a1a;
  color: white;
  cursor: pointer;
}

button:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.result {
  margin-top: 1.5rem;
  padding: 1rem;
  border-radius: 8px;
  white-space: pre-wrap;
  font-size: 0.9rem;
}

.result.success {
  background: #e6f4ea;
  border: 1px solid #a8d5b5;
}

.result.error {
  background: #fdecea;
  border: 1px solid #f5b5ac;
}

.hint {
  color: #666;
  font-size: 0.8rem;
}