body {
    font-family: Arial, sans-serif;
    background: linear-gradient(135deg, #c9d6ff, #e2e2e2);
    margin: 0;
    padding: 20px;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    color: #333;
}

.container {
    text-align: center;
    background-color: rgba(255, 255, 255, 0.9);
    border-radius: 15px;
    padding: 20px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
    max-width: 800px;
    width: 100%;
}

h1 {
    color: #5c6bc0;
    margin-top: 0;
    text-shadow: 1px 1px 2px rgba(0,0,0,0.1);
}

.game-info {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 15px;
    padding: 10px;
    background-color: #f8f9fa;
    border-radius: 10px;
}

.level {
    font-size: 18px;
    font-weight: bold;
    color: #5c6bc0;
}

#reset-btn {
    padding: 10px 20px;
    font-size: 16px;
    background-color: #00b894;
    color: white;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    transition: background-color 0.3s;
}

#reset-btn:hover {
    background-color: #00a085;
}

.controls {
    margin-bottom: 15px;
}

#prev-level, #next-level, #rotate-x, #rotate-y, #rotate-z {
    padding: 8px 15px;
    font-size: 14px;
    background-color: #6c5ce7;
    color: white;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    transition: background-color 0.3s;
    margin: 0 5px;
}

#prev-level:hover, #next-level:hover, #rotate-x:hover, #rotate-y:hover, #rotate-z:hover {
    background-color: #5d4de0;
}

#prev-level:disabled, #next-level:disabled {
    background-color: #ccc;
    cursor: not-allowed;
}

.game-area {
    display: flex;
    justify-content: space-between;
    margin-bottom: 20px;
}

.shadow-board {
    width: 300px;
    height: 300px;
    background-color: #f1f2f6;
    border: 2px dashed #ccc;
    border-radius: 10px;
    position: relative;
    overflow: hidden;
}

.object-container {
    width: 300px;
    height: 300px;
    background-color: #dfe6e9;
    border: 2px solid #b2bec3;
    border-radius: 10px;
    position: relative;
    overflow: hidden;
}

.target-shadow {
    position: absolute;
    fill: none;
    stroke: #e84393;
    stroke-width: 3;
    stroke-dasharray: 5, 5;
}

.object-shadow {
    position: absolute;
    fill: rgba(79, 195, 247, 0.5);
    stroke: #00b894;
    stroke-width: 2;
}

.instructions {
    background-color: #f8f9fa;
    padding: 15px;
    border-radius: 10px;
    margin-bottom: 20px;
}

.instructions p {
    margin: 0;
    color: #636e72;
    font-size: 14px;
}

.win-message {
    display: none;
    margin-top: 20px;
    padding: 20px;
    background-color: #d4edda;
    border: 1px solid #c3e6cb;
    border-radius: 10px;
    color: #155724;
}

.win-message p {
    margin: 10px 0;
    font-size: 18px;
}

#next-level-btn, #play-again-btn {
    padding: 10px 20px;
    font-size: 16px;
    background-color: #5c6bc0;
    color: white;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    transition: background-color 0.3s;
    margin: 0 10px;
}

#next-level-btn:hover, #play-again-btn:hover {
    background-color: #4a5ab0;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .game-area {
        flex-direction: column;
        align-items: center;
    }
    
    .shadow-board, .object-container {
        width: 300px;
        margin-bottom: 20px;
    }
    
    .container {
        padding: 15px;
    }
}