/* 基础样式重置 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary-color: #3498db;
    --primary-dark: #2980b9;
    --secondary-color: #f39c12;
    --secondary-dark: #e67e22;
    --text-color: #2c3e50;
    --light-text: #7f8c8d;
    --background: #f9f9f9;
    --card-bg: #ffffff;
    --path-color: #fffde7;
    --wall-color: #546e7a;
    --player-color: #e74c3c;
    --question-color: #66bb6a;
    --end-color: #42a5f5;
    --shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    --border-radius: 15px;
    --transition: all 0.3s ease;
}

body {
    font-family: 'Segoe UI', 'Roboto', 'Helvetica Neue', Arial, sans-serif;
    line-height: 1.6;
    color: var(--text-color);
    background-color: var(--background);
    margin: 0;
    padding: 0;
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
}

.container {
    max-width: 800px;
    width: 100%;
    padding: 20px;
    background-color: var(--card-bg);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
    margin: 20px;
}

header {
    text-align: center;
    margin-bottom: 30px;
}

h1 {
    font-size: 32px;
    color: var(--text-color);
    margin-bottom: 10px;
}

.subtitle {
    font-size: 18px;
    color: var(--light-text);
    margin-bottom: 20px;
}

.back-btn {
    display: inline-block;
    padding: 8px 16px;
    background-color: var(--primary-color);
    color: white;
    text-decoration: none;
    border-radius: 5px;
    font-weight: 600;
    margin-bottom: 15px;
    transition: var(--transition);
}

.back-btn:hover {
    background-color: var(--primary-dark);
    transform: translateY(-2px);
}

.game-info {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
}

.level-container, .score-container {
    font-size: 18px;
    font-weight: 600;
}

#level-select {
    padding: 8px 12px;
    border-radius: 5px;
    border: 1px solid #ddd;
    font-size: 16px;
    margin-left: 10px;
}

.control-panel {
    display: flex;
    justify-content: center;
    gap: 20px;
    margin-bottom: 30px;
}

.btn {
    padding: 10px 20px;
    border: none;
    border-radius: 5px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
}

.primary-btn {
    background-color: var(--primary-color);
    color: white;
}

.primary-btn:hover {
    background-color: var(--primary-dark);
    transform: translateY(-2px);
}

.game-container {
    display: flex;
    justify-content: center;
    margin-bottom: 30px;
}

#maze-container {
    display: flex;
    flex-direction: column;
    border: 2px solid var(--text-color);
    border-radius: 5px;
}

.row {
    display: flex;
}

.maze {
    border-collapse: collapse;
    margin: 0 auto;
}

.cell {
    position: relative;
    width: 40px;
    height: 40px;
    border: 1px solid #ccc;
    text-align: center;
    vertical-align: middle;
    transition: var(--transition);
    cursor: pointer;
}

.wall {
    background-color: var(--wall-color);
    cursor: not-allowed;
}

.path {
    background-color: var(--path-color);
}

.player {
    position: relative;
}

.player::before {
    content: '👦';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    font-size: 24px;
    z-index: 2;
}

.question {
    background-color: var(--question-color);
}

.end {
    background-color: var(--end-color);
}

.modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.7);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 1000;
}

.modal-content {
    background-color: var(--card-bg);
    padding: 30px;
    border-radius: var(--border-radius);
    max-width: 90%;
    width: 500px;
    text-align: center;
}

.modal h2 {
    font-size: 24px;
    margin-bottom: 20px;
    color: var(--text-color);
}

.question-text {
    font-size: 18px;
    margin-bottom: 20px;
    text-align: left;
    line-height: 1.6;
}

.options-container {
    display: flex;
    flex-direction: column;
    gap: 10px;
    margin-bottom: 20px;
}

.option {
    padding: 10px 15px;
    background-color: #f1f1f1;
    border-radius: 5px;
    cursor: pointer;
    text-align: left;
    transition: var(--transition);
}

.option:hover {
    background-color: #e1e1e1;
}

.feedback {
    font-size: 20px;
    font-weight: bold;
    margin-bottom: 20px;
    padding: 10px;
    border-radius: 5px;
}

.feedback.correct {
    background-color: rgba(102, 187, 106, 0.2);
    color: #2e7d32;
}

.feedback.incorrect {
    background-color: rgba(239, 83, 80, 0.2);
    color: #c62828;
}

.hidden {
    display: none;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .container {
        padding: 15px;
    }
    
    h1 {
        font-size: 28px;
    }
    
    .subtitle {
        font-size: 16px;
    }
    
    .game-info {
        flex-direction: column;
        gap: 15px;
        align-items: flex-start;
    }
    
    .cell {
        width: 50px;
        height: 50px;
        font-size: 18px;
    }
    
    .player::before {
        font-size: 25px;
    }
    
    .modal-content {
        padding: 20px;
    }
    
    .question-text {
        font-size: 16px;
    }
}

@media (max-width: 480px) {
    .cell {
        width: 40px;
        height: 40px;
        font-size: 16px;
    }
    
    .player::before {
        font-size: 20px;
    }
    
    .control-panel {
        flex-direction: column;
        gap: 10px;
    }
    
    .btn {
        width: 100%;
    }
}

/* 添加触摸设备优化 */
@media (hover: none) {
    .cell:active {
        transform: scale(0.95);
    }
    
    .option:active {
        background-color: #e1e1e1;
    }
}

/* 成就系统样式 */
.achievements {
    margin-top: 20px;
    background-color: rgba(255, 255, 255, 0.9);
    border-radius: var(--border-radius);
    padding: 15px;
    box-shadow: var(--shadow);
}

.achievements h3 {
    margin-bottom: 10px;
    color: var(--text-color);
    text-align: center;
}

.achievement-grid {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 10px;
}

.achievement {
    width: 40px;
    height: 40px;
    display: flex;
    justify-content: center;
    align-items: center;
    background-color: #f5f5f5;
    border-radius: 50%;
    font-size: 20px;
    opacity: 0.3;
    transition: var(--transition);
    cursor: help;
}

.achievement.unlocked {
    opacity: 1;
    transform: scale(1.1);
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
}

/* 进度条样式 */
.progress-container {
    margin-top: 20px;
    display: flex;
    flex-direction: column;
    gap: 5px;
}

.progress-label {
    font-size: 14px;
    color: var(--text-color);
}

.progress-bar {
    height: 10px;
    background-color: #e0e0e0;
    border-radius: 5px;
    overflow: hidden;
}

.progress-fill {
    height: 100%;
    background-color: var(--primary-color);
    width: 0%;
    transition: width 0.5s ease;
}

.progress-text {
    font-size: 12px;
    color: var(--light-text);
    text-align: right;
}

/* 通知样式 */
.notification {
    position: fixed;
    top: 20px;
    right: 20px;
    background-color: rgba(0, 0, 0, 0.8);
    color: white;
    padding: 10px 20px;
    border-radius: 5px;
    z-index: 1000;
    transform: translateX(120%);
    transition: transform 0.3s ease;
}

.notification.show {
    transform: translateX(0);
}