:root {
  font-family: sans-serif;
}

body {
  margin: 0;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: #f4f4f6;
  color: #1d1d22;
}

main {
  width: min(28rem, calc(100vw - 2rem));
  padding: 1.5rem;
  border-radius: 8px;
  background: #fff;
  box-shadow: 0 1px 4px rgba(0, 0, 0, 0.15);
}

h1 {
  margin: 0 0 1rem;
  font-size: 1.25rem;
  font-weight: 500;
}

label {
  display: block;
  margin-bottom: 0.4rem;
  font-size: 0.9rem;
}

textarea {
  box-sizing: border-box;
  width: 100%;
  min-height: 6rem;
  padding: 0.5rem;
  font: 0.9rem ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  resize: vertical;
}

button {
  margin-top: 0.75rem;
  padding: 0.5rem 1.25rem;
  font: inherit;
  cursor: pointer;
}

button:disabled {
  cursor: progress;
}

.message {
  min-height: 1.4em;
  margin: 0.75rem 0 0;
  color: #b3261e;
}