* {
    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;
    touch-action: manipulation;
    -webkit-tap-highlight-color: transparent;
}

.game-container {
    background: rgba(255, 255, 255, 0.95);
    border-radius: 20px;
    padding: 20px;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
    max-width: 400px;
    width: 95%;
    margin: 20px auto;
}

.game-header {
    text-align: center;
    margin-bottom: 20px;
}

.game-header h1 {
    color: #333;
    font-size: 2.5rem;
    margin-bottom: 15px;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.1);
}

.score-board {
    display: flex;
    justify-content: space-around;
    background: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
    padding: 12px;
    border-radius: 15px;
    color: white;
    font-weight: bold;
    font-size: 1.1rem;
}

.score-board span {
    display: flex;
    flex-direction: column;
    align-items: center;
}

.game-canvas-container {
    display: flex;
    justify-content: center;
    margin: 20px 0;
}

#gameCanvas {
    border: 3px solid #333;
    border-radius: 10px;
    background: #222;
    box-shadow: 0 8px 16px rgba(0, 0, 0, 0.2);
}

.game-controls {
    margin: 20px 0;
}

.control-row {
    display: flex;
    justify-content: center;
    margin: 8px 0;
}

.control-btn {
    width: 70px;
    height: 70px;
    margin: 0 10px;
    border: none;
    border-radius: 50%;
    background: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
    color: white;
    font-size: 1.5rem;
    font-weight: bold;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.2);
}

.control-btn:hover {
    transform: scale(1.1);
    box-shadow: 0 6px 12px rgba(0, 0, 0, 0.3);
}

.control-btn:active {
    transform: scale(0.95);
}

#pauseBtn {
    background: linear-gradient(135deg, #ff9a9e 0%, #fad0c4 100%);
    color: #333;
    font-size: 1.2rem;
}

.game-instructions {
    text-align: center;
    color: #666;
    font-size: 0.9rem;
    margin-top: 15px;
}

.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.8);
    z-index: 1000;
    justify-content: center;
    align-items: center;
}

.modal-content {
    background: white;
    padding: 30px;
    border-radius: 20px;
    text-align: center;
    max-width: 400px;
    width: 90%;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.4);
}

.modal-content h2 {
    color: #e74c3c;
    margin-bottom: 20px;
    font-size: 2rem;
}

.stats p {
    margin: 10px 0;
    font-size: 1.1rem;
    color: #333;
}

.stats span {
    font-weight: bold;
    color: #e74c3c;
}

.restart-btn {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border: none;
    padding: 15px 30px;
    border-radius: 25px;
    font-size: 1.2rem;
    font-weight: bold;
    cursor: pointer;
    margin-top: 20px;
    transition: all 0.3s ease;
}

.restart-btn:hover {
    transform: scale(1.05);
    box-shadow: 0 8px 16px rgba(0, 0, 0, 0.3);
}

/* 手机端优化 */
@media (max-width: 768px) {
    .game-container {
        padding: 15px;
        margin: 10px;
        border-radius: 15px;
    }
    
    .game-header h1 {
        font-size: 2rem;
    }
    
    .score-board {
        font-size: 0.9rem;
        padding: 8px;
    }
    
    .control-btn {
        width: 60px;
        height: 60px;
        font-size: 1.3rem;
        margin: 0 8px;
    }
    
    #pauseBtn {
        font-size: 1rem;
    }
    
    #gameCanvas {
        width: 280px;
        height: 400px;
    }
}

/* 超小屏幕优化 */
@media (max-width: 480px) {
    .game-header h1 {
        font-size: 1.8rem;
    }
    
    .score-board {
        flex-direction: column;
        gap: 5px;
    }
    
    .control-btn {
        width: 50px;
        height: 50px;
        font-size: 1.1rem;
        margin: 0 5px;
    }
    
    #gameCanvas {
        width: 250px;
        height: 350px;
    }
    
    .modal-content {
        padding: 20px;
    }
    
    .modal-content h2 {
        font-size: 1.5rem;
    }
}

/* 防止文本选择 */
.control-btn, .restart-btn {
    user-select: none;
    -webkit-user-select: none;
    -moz-user-select: none;
    -ms-user-select: none;
}

/* 动画效果 */
@keyframes pulse {
    0% { transform: scale(1); }
    50% { transform: scale(1.05); }
    100% { transform: scale(1); }
}

.score-board {
    animation: pulse 2s infinite;
}