body {
  font-family: system-ui, sans-serif;
  max-width: 640px;
  margin: 2rem auto;
  padding: 0 1rem;
  line-height: 1.5;
}
fieldset {
  margin-block: 1rem;
  border-radius: 8px;
}
button {
  padding: 0.5rem 1rem;
  cursor: pointer;
}
button:disabled {
  cursor: not-allowed;
  opacity: 0.5;
}
textarea, input {
  width: 100%;
  box-sizing: border-box;
  font-family: ui-monospace, monospace;
  font-size: 0.85rem;
}
textarea {
  white-space: nowrap;
}
#log {
  white-space: pre-wrap;
  background: canvastext;
  color: canvas;
  padding: 0.75rem;
  border-radius: 8px;
  max-height: 240px;
  overflow-y: auto;
  font-family: ui-monospace, monospace;
  font-size: 0.8rem;
}
.row {
  display: flex;
  gap: 0.5rem;
  align-items: center;
  margin-block: 0.5rem;
}
.row > * {
  flex: 1;
}