:root {
  color-scheme: light;
  font-family: "IBM Plex Sans", system-ui, sans-serif;
  background: #f5f5f2;
  color: #1b1b1b;
}

body {
  margin: 0;
  padding: 32px;
}

main {
  max-width: 720px;
  margin: 0 auto;
}

h1 {
  font-size: 2rem;
  margin-bottom: 0.25rem;
}

.subtitle {
  margin-top: 0;
  color: #4a4a4a;
}

.card {
  background: #ffffff;
  border-radius: 12px;
  padding: 16px;
  margin: 16px 0;
  box-shadow: 0 10px 24px rgba(0, 0, 0, 0.08);
}

.row {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

button {
  padding: 10px 16px;
  border-radius: 8px;
  border: none;
  background: #1b1b1b;
  color: #ffffff;
  cursor: pointer;
}

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

textarea {
  width: 100%;
  margin-top: 8px;
  border-radius: 8px;
  border: 1px solid #cccccc;
  padding: 8px;
}

pre {
  background: #f0f0ee;
  padding: 12px;
  border-radius: 8px;
  white-space: pre-wrap;
}