* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  background: linear-gradient(135deg, #1a1a2e 0%, #16213e 50%, #0f3460 100%);
  min-height: 100vh;
  display: flex;
  justify-content: center;
  align-items: center;
}

.game-container {
  background: rgba(255, 255, 255, 0.08);
  border-radius: 16px;
  padding: 24px 32px;
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.4);
  text-align: center;
}

h1 {
  color: #4fc3f7;
  font-size: 28px;
  margin-bottom: 16px;
  letter-spacing: 4px;
}

.score-board {
  display: flex;
  justify-content: space-between;
  color: #e0e0e0;
  font-size: 16px;
  margin-bottom: 12px;
  padding: 0 8px;
}

#gameCanvas {
  background: #0d1b2a;
  border: 2px solid #4fc3f7;
  border-radius: 8px;
  display: block;
  margin: 0 auto;
}

.controls {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 12px;
  margin-top: 16px;
}

button {
  background: #4fc3f7;
  color: #0d1b2a;
  border: none;
  border-radius: 8px;
  padding: 10px 20px;
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.2s, transform 0.1s;
}

button:hover:not(:disabled) {
  background: #81d4fa;
  transform: translateY(-1px);
}

button:disabled {
  background: #455a64;
  color: #90a4ae;
  cursor: not-allowed;
}

select {
  background: #0d1b2a;
  color: #e0e0e0;
  border: 1px solid #4fc3f7;
  border-radius: 8px;
  padding: 9px 12px;
  font-size: 15px;
  cursor: pointer;
}

.hint {
  color: #90a4ae;
  font-size: 13px;
  margin-top: 14px;
}