* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background: #f5f5f5;
  color: #111;
  display: flex;
  align-items: center;
  justify-content: center;
}

.layout {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 16px;
}

button {
  appearance: none;
  border: none;
  border-radius: 999px;
  padding: 16px 36px;
  font: inherit;
  font-size: 18px;
  cursor: pointer;
  background: #111;
  color: #fff;
  transition: opacity 140ms ease;
  min-width: 220px;
}

button:hover:not(:disabled) {
  opacity: 0.75;
}

button:disabled {
  opacity: 0.3;
  cursor: not-allowed;
}

#stopButton {
  background: #e53935;
}

.status {
  margin: 0;
  font-size: 14px;
  color: #888;
}