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

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    background-color: #f5f5f5;
    color: #333;
    line-height: 1.6;
}

.game-container {
    max-width: 800px;
    margin: 20px auto;
    padding: 20px;
    background-color: white;
    border-radius: 8px;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

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

.game-header h1 {
    color: #2c3e50;
    margin-bottom: 15px;
}

.game-status {
    display: flex;
    justify-content: center;
    gap: 20px;
    margin-bottom: 15px;
    font-size: 1.1em;
}

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

#game-canvas-container canvas {
    border: 1px solid #ddd;
    border-radius: 4px;
    background-color: #fff;
}

#reset-game {
    padding: 8px 16px;
    font-size: 1em;
    background-color: #3498db;
    color: white;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    transition: background-color 0.3s;
}

#reset-game:hover {
    background-color: #2980b9;
}

.game-info {
    margin-top: 30px;
    padding: 20px;
    background-color: #f8f9fa;
    border-radius: 4px;
}

.game-info h2 {
    color: #2c3e50;
    margin-bottom: 15px;
}

.game-info ul {
    list-style-position: inside;
    margin-left: 20px;
}

.game-info li {
    margin-bottom: 10px;
}

.game-info ul ul {
    margin-top: 5px;
    margin-bottom: 10px;
}

#game-result {
    font-weight: bold;
    color: #e74c3c;
}

.ai-side-option.disabled {
    opacity: 0.6;
    cursor: not-allowed;
    color: #999;
}

.ai-side-option.disabled input[type="radio"] {
    cursor: not-allowed;
    opacity: 0.5;
}

/* 增强禁用状态的视觉效果 */
.ai-side-option.disabled span {
    text-decoration: none;
    color: #999;
}

@media (max-width: 600px) {
    .game-container {
        margin: 10px;
        padding: 10px;
    }

    .game-status {
        flex-direction: column;
        gap: 10px;
    }

    #game-canvas-container canvas {
        max-width: 100%;
        height: auto;
    }
}