body {
  margin: 0;
  font-family: 'Segoe UI', sans-serif;
  background: linear-gradient(135deg, #ff9a9e, #fad0c4);
  color: #333;
  text-align: center;
}

header {
  padding: 20px;
  background: rgba(255,255,255,0.8);
  box-shadow: 0 4px 8px rgba(0,0,0,0.2);
}

h1 {
  margin: 0;
  font-size: 2rem;
}

.back-btn {
  display: inline-block;
  margin-top: 10px;
  padding: 8px 15px;
  background: #ff4757;
  color: #fff;
  border-radius: 8px;
  text-decoration: none;
  transition: background 0.3s;
}

.back-btn:hover {
  background: #e84118;
}

main {
  display: flex;
  justify-content: center;
  align-items: center;
  flex-direction: column;
  margin-top: 20px;
}

canvas {
  background: #fff;
  border: 3px solid #333;
  border-radius: 10px;
}

.score-board {
  margin-top: 15px;
  font-size: 1.2rem;
  background: rgba(255,255,255,0.8);
  padding: 10px 20px;
  border-radius: 10px;
  box-shadow: 0 4px 6px rgba(0,0,0,0.2);
}