:root {
  --bg-start: #1e3c72;
  --bg-end: #2a5298;
  --accent: #ff6f61;
  --text-light: #f0f4f8;
  --button-bg: rgba(255, 255, 255, 0.1);
  --button-hover: rgba(255, 255, 255, 0.2);
}

* {
  box-sizing: border-box;
  transition: all 0.3s ease;
}

body {
  margin: 0;
  padding: 0;
  height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: start;
  background: linear-gradient(135deg, var(--bg-start), var(--bg-end));
  color: var(--text-light);
  font-family: 'monospace';
  overflow: hidden;
}

h1 {
  margin: 1rem 0;
  font-size: 2.5rem;
  letter-spacing: 1px;
  text-shadow: 0 2px 4px rgba(0,0,0,0.3);
}

#info {
  background: rgba(0, 0, 0, 0.4);
  padding: 0.75rem 1.5rem;
  border-radius: 12px;
  box-shadow: 0 4px 10px rgba(0,0,0,0.4);
  margin-bottom: 1rem;
  font-size: 1.1rem;
}

button {
  background: var(--button-bg);
  border: none;
  border-radius: 8px;
  padding: 0.6rem 1rem;
  margin: 0.3rem;
  color: var(--text-light);
  font-size: 1rem;
  cursor: pointer;
  box-shadow: 0 2px 6px rgba(0,0,0,0.3);
}

button:hover {
  background: var(--button-hover);
  transform: scale(1.05);
}

button:active {
  transform: scale(0.98);
}

#controls {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  margin-top: 0.5rem;
}

@media (max-width: 600px) {
  h1 { font-size: 2rem; }
  #info { font-size: 1rem; }
  button { font-size: 0.9rem; padding: 0.5rem 0.8rem; }
}

#start-stop {
  display: inline-flex;
  gap: 0.5rem;
  margin-bottom: 1rem;
}