* { box-sizing: border-box; margin: 0; }

body {
  font-family: system-ui, sans-serif;
  padding: 2rem 1rem;
  max-width: 400px;
  margin: 0 auto;
}

h1 { margin-bottom: 1.5rem; }

button {
  font-size: 1rem;
  padding: 0.75rem 1.25rem;
  border: 2px solid #000;
  background: #000;
  color: #fff;
  border-radius: 6px;
  cursor: pointer;
}

button:disabled {
  opacity: 0.4;
  cursor: default;
}

.schedule {
  display: flex;
  gap: 0.5rem;
  margin-top: 1rem;
}

input {
  font-size: 1rem;
  padding: 0.75rem;
  border: 2px solid #000;
  border-radius: 6px;
  width: 5rem;
  text-align: center;
}

pre {
  margin-top: 1.5rem;
  font-size: 0.85rem;
  white-space: pre-wrap;
  color: #555;
}