body {
  background: linear-gradient(120deg, #43cea2 0%, #185a9d 100%);
  font-family: 'Segoe UI', Arial, sans-serif;
  margin: 0;
  min-height: 100vh;
  text-align: center;
}
h1 {
  color: #185a9d;
  margin-top: 32px;
  margin-bottom: 12px;
  letter-spacing: 2px;
}
.scoreboard {
  font-size: 1.2em;
  color: #444;
  margin-bottom: 12px;
}
#game-canvas {
  background: #fff;
  border: 2px solid #43cea2;
  border-radius: 8px;
  margin-bottom: 18px;
  max-width: 98vw;
  height: auto;
  display: block;
  margin-left: auto;
  margin-right: auto;
}
.controls {
  color: #185a9d;
  margin-bottom: 24px;
}
button {
  background: #43cea2;
  color: #fff;
  border: none;
  border-radius: 8px;
  padding: 10px 28px;
  font-size: 1em;
  font-weight: 600;
  cursor: pointer;
  margin-top: 8px;
  transition: background 0.2s;
}
button:hover {
  background: #185a9d;
  color: #fff;
}
@media (max-width: 500px) {
  #game-canvas { max-width: 98vw; }
}