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

body {
  font-family: "Arial", sans-serif;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 100vh;
  overflow: hidden;
}

#game-container {
  position: relative;
  max-width: 100vw;
  max-height: 100vh;
}

#instructions {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  background: rgba(255, 255, 255, 0.95);
  padding: 40px;
  border-radius: 20px;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
  text-align: center;
  z-index: 1000;
  backdrop-filter: blur(10px);
}

#instructions h1 {
  color: #667eea;
  margin-bottom: 20px;
  font-size: 2.5em;
  text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.1);
}

#instructions p {
  color: #333;
  margin-bottom: 15px;
  font-size: 1.1em;
  line-height: 1.6;
}

#instructions p:last-of-type {
  color: #e74c3c;
  font-weight: bold;
  margin-bottom: 25px;
}

#start-btn {
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  color: white;
  border: none;
  padding: 15px 40px;
  font-size: 1.2em;
  border-radius: 50px;
  cursor: pointer;
  transition: all 0.3s ease;
  box-shadow: 0 10px 20px rgba(102, 126, 234, 0.4);
}

#start-btn:hover {
  transform: translateY(-3px);
  box-shadow: 0 15px 30px rgba(102, 126, 234, 0.6);
}

#start-btn:active {
  transform: translateY(-1px);
}

#game-canvas {
  border-radius: 10px;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
  overflow: hidden;
}

.hidden {
  display: none !important;
}

/* Game Over / Victory Screen */
.overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.8);
  display: flex;
  justify-content: center;
  align-items: center;
  z-index: 2000;
}

.overlay-content {
  background: white;
  padding: 50px;
  border-radius: 20px;
  text-align: center;
  animation: slideIn 0.5s ease;
}

@keyframes slideIn {
  from {
    transform: scale(0.5);
    opacity: 0;
  }
  to {
    transform: scale(1);
    opacity: 1;
  }
}