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

body {
  font-family: Arial, sans-serif;
  background-color: #f0f0f0;
  padding: 20px;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  background: white;
  padding: 20px;
  border-radius: 10px;
  box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
}

h1 {
  text-align: center;
  margin-bottom: 20px;
  color: #333;
}

.game-info {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 20px;
  padding: 10px;
  background: #e8f4f8;
  border-radius: 5px;
}

.timer {
  font-size: 18px;
  font-weight: bold;
  color: #e74c3c;
}

#newGameBtn {
  padding: 10px 20px;
  background: #3498db;
  color: white;
  border: none;
  border-radius: 5px;
  cursor: pointer;
  font-size: 16px;
}

#newGameBtn:hover {
  background: #2980b9;
}

.game-container {
  display: flex;
  gap: 20px;
  flex-wrap: wrap;
}

.original-image-container,
.puzzle-container {
  flex: 1;
  min-width: 300px;
}

.original-image-container img {
  width: 100%;
  max-width: 500px;
  border: 2px solid #ddd;
  border-radius: 5px;
  margin: 20px 0;
}

.puzzle-board {
  display: grid;
  gap: 0px;
  margin: 20px 0;
  border: 2px solid #333;
  background: #ddd;
  height: 500px;
}

.puzzle-piece {
  cursor: move;
  background-size: cover;
  border: 0px;
  transition: transform 0.2s;
}

.puzzle-piece:hover {
  transform: scale(1.02);
  z-index: 1;
}

.puzzle-piece.dragging {
  opacity: 0.5;
  z-index: 10;
}

.message {
  padding: 10px;
  text-align: center;
  font-weight: bold;
  min-height: 40px;
}

.message.success {
  color: #27ae60;
  background: #d5f4e6;
}

.message.error {
  color: #e74c3c;
  background: #fadbd8;
}

@media (max-width: 768px) {
  .game-container {
    flex-direction: column;
  }
}