/* 语法页面样式 */

/* 语法页面容器 */
#grammar-tab {
    padding: 20px;
}

/* 语法页面标题 */
#grammar-tab h2 {
    text-align: center;
    color: #D97706;
    margin-bottom: 30px;
    font-size: 24px;
}

/* 语法卡片样式 */
.grammar-card {
    background: #ffffff;
    padding: 20px;
    border-radius: 12px;
    margin-bottom: 20px;
    box-shadow: 0 4px 6px rgba(0,0,0,0.02);
    border: 1px solid #FEF3C7;
    transition: all 0.3s ease;
}

.grammar-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 12px rgba(0,0,0,0.05);
}

/* 语法标题 */
.grammar-title {
    font-size: 18px;
    font-weight: bold;
    color: #D97706;
    margin-bottom: 10px;
    display: flex;
    align-items: center;
    gap: 8px;
}

/* 语法规则 */
.grammar-rule {
    font-size: 14px;
    line-height: 1.6;
    color: #374151;
    margin-bottom: 15px;
}

/* 语法例句 */
.grammar-examples {
    background: #FEF3C7;
    padding: 15px;
    border-radius: 8px;
    margin-top: 15px;
}

.grammar-examples h4 {
    color: #92400E;
    margin-top: 0;
    margin-bottom: 10px;
    font-size: 14px;
}

.grammar-example {
    display: flex;
    flex-direction: column;
    gap: 5px;
    margin-bottom: 10px;
}

.grammar-example .japanese {
    font-size: 16px;
    font-weight: bold;
    color: #D97706;
}

.grammar-example .chinese {
    font-size: 14px;
    color: #64748B;
}

/* 语法练习区域 */
.grammar-practice {
    margin-top: 30px;
    padding-top: 20px;
    border-top: 1px solid #FEF3C7;
}

.grammar-practice h3 {
    color: #D97706;
    margin-bottom: 20px;
    font-size: 18px;
}

/* 练习选项 */
.practice-options {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.practice-option {
    padding: 12px 16px;
    border: 1px solid #D1D5DB;
    border-radius: 8px;
    background-color: #ffffff;
    cursor: pointer;
    transition: all 0.2s ease;
}

.practice-option:hover {
    background-color: #F9FAFB;
    border-color: #F59E0B;
}

.practice-option.correct {
    background-color: #D1FAE5;
    border-color: #10B981;
    color: #065F46;
}

.practice-option.incorrect {
    background-color: #FEE2E2;
    border-color: #EF4444;
    color: #991B1B;
}

/* 语法分类导航 */
.grammar-categories {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
    margin-bottom: 20px;
}

.grammar-category {
    padding: 8px 16px;
    border-radius: 20px;
    background-color: #FEF3C7;
    color: #92400E;
    font-size: 14px;
    font-weight: bold;
    cursor: pointer;
    transition: all 0.2s ease;
}

.grammar-category:hover {
    background-color: #F59E0B;
    color: white;
}

.grammar-category.active {
    background-color: #F59E0B;
    color: white;
}

/* 语法搜索 */
.grammar-search {
    margin-bottom: 20px;
}

.grammar-search input {
    width: 100%;
    padding: 12px;
    border: 1px solid #FCD34D;
    border-radius: 8px;
    font-size: 16px;
    background-color: #FFFBEB;
}

/* 响应式设计 */
@media (max-width: 768px) {
    #grammar-tab {
        padding: 15px;
    }
    
    .grammar-card {
        padding: 15px;
    }
    
    .grammar-title {
        font-size: 16px;
    }
    
    .grammar-examples {
        padding: 12px;
    }
}