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

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

.game-container {
  background: rgba(255, 255, 255, 0.95);
  border-radius: 20px;
  padding: 40px;
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
  text-align: center;
  max-width: 600px;
  width: 90%;
}

.header h1 {
  color: #333;
  margin-bottom: 10px;
  font-size: 2.5em;
  text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.1);
}

.header p {
  color: #666;
  margin-bottom: 30px;
  font-size: 1.1em;
}

.target-word {
  display: flex;
  justify-content: center;
  align-items: center;
  margin: 30px 0;
  flex-wrap: wrap;
  gap: 10px;
}

.letter {
  width: 40px;
  height: 50px;
  border: 3px solid #ddd;
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 24px;
  font-weight: bold;
  background: white;
  transition: all 0.3s ease;
}

.letter.filled {
  background: linear-gradient(135deg, #4CAF50, #45a049);
  color: white;
  border-color: #4CAF50;
  transform: scale(1.1);
  box-shadow: 0 5px 15px rgba(76, 175, 80, 0.3);
}

.space {
  width: 20px;
}

.letter-buttons {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 15px;
  margin: 30px 0;
}

.letter-btn {
  width: 60px;
  height: 60px;
  border: none;
  border-radius: 50%;
  background: linear-gradient(135deg, #FF6B6B, #FF5252);
  color: white;
  font-size: 20px;
  font-weight: bold;
  cursor: pointer;
  transition: all 0.3s ease;
  box-shadow: 0 5px 15px rgba(255, 107, 107, 0.3);
}

.letter-btn:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 20px rgba(255, 107, 107, 0.4);
}

.letter-btn:active {
  transform: translateY(0);
}

.letter-btn.used {
  background: #ccc;
  cursor: not-allowed;
  transform: none;
  box-shadow: none;
}

.score {
  margin: 20px 0;
  font-size: 1.2em;
  color: #333;
}

#collected {
  color: #4CAF50;
  font-weight: bold;
}

.message {
  margin: 20px 0;
  font-size: 1.3em;
  font-weight: bold;
  min-height: 30px;
}

.success {
  color: #4CAF50;
  animation: bounce 0.6s ease-in-out;
}

.reset-btn {
  background: linear-gradient(135deg, #667eea, #764ba2);
  color: white;
  border: none;
  padding: 12px 30px;
  border-radius: 25px;
  font-size: 16px;
  cursor: pointer;
  transition: all 0.3s ease;
  box-shadow: 0 5px 15px rgba(102, 126, 234, 0.3);
}

.reset-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 20px rgba(102, 126, 234, 0.4);
}

@keyframes bounce {
  0%, 20%, 50%, 80%, 100% {
    transform: translateY(0);
  }
  40% {
    transform: translateY(-10px);
  }
  60% {
    transform: translateY(-5px);
  }
}

@media (max-width: 600px) {
  .game-container {
    padding: 20px;
  }
  
  .header h1 {
    font-size: 2em;
  }
  
  .letter {
    width: 35px;
    height: 45px;
    font-size: 20px;
  }
  
  .letter-btn {
    width: 50px;
    height: 50px;
    font-size: 18px;
  }
}