body {
  font-family: system-ui, sans-serif;
  max-width: 44rem;
  margin: 1.5rem auto;
  padding: 0 1rem;
  line-height: 1.5;
}

.note {
  font-size: 0.85rem;
  color: #666;
}

.sub {
  color: #444;
}

.panel {
  border: 1px solid #ccc;
  padding: 1rem;
  margin: 1rem 0;
}

label {
  display: inline-block;
  min-width: 7rem;
  margin-right: 0.5rem;
}

input,
select,
button {
  font-size: 1rem;
  padding: 0.35rem 0.5rem;
}

button {
  cursor: pointer;
}

.windows-list {
  border: 1px solid #ddd;
  border-radius: 4px;
  min-height: 4rem;
  padding: 0.5rem 0.75rem;
  background: #fafafa;
  margin: 0.75rem 0;
}

.windows-list ul {
  margin: 0;
  padding-left: 1.2rem;
}

.windows-list li + li {
  margin-top: 0.35rem;
}

#log {
  font-size: 0.8rem;
  background: #f4f4f4;
  padding: 0.75rem;
  overflow: auto;
  min-height: 4rem;
}

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