/* 基本樣式設定 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Microsoft JhengHei', Consolas, sans-serif;
    line-height: 1.6;
    background: #f0f2f5;
    min-height: 100vh;
}

.container {
    display: flex;
    min-height: 100vh;
}

/* 側邊導航欄樣式 */
.navbar {
    width: 220px;
    background: #fff;
    color: #333;
    box-shadow: 0 0 10px rgba(0,0,0,0.05);
    display: flex;
    flex-direction: column;
    padding: 0;
    position: fixed;
    height: 100vh;
    z-index: 100;
}

.navbar h1 {
    font-size: 1.2rem;
    font-weight: bold;
    padding: 1.5rem 1rem;
    color: #1890ff;
    border-bottom: 1px solid #f0f0f0;
    margin: 0;
    display: flex;
    align-items: center;
    gap: 8px;
}

.navbar .nav-links {
    display: flex;
    flex-direction: column;
    padding: 1rem 0;
}

.navbar a {
    color: #555;
    text-decoration: none;
    padding: 0.8rem 1.5rem;
    transition: all 0.3s;
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 0.95rem;
}

.navbar a:hover {
    background-color: #f0f7ff;
    color: #1890ff;
}

.navbar a.active {
    background-color: #e6f7ff;
    color: #1890ff;
    border-right: 3px solid #1890ff;
}

/* 內容區域 */
.content {
    flex: 1;
    padding: 1.5rem 2rem;
    margin-left: 220px;
    background: #f0f2f5;
}

/* 頁面標題區域 */
.page-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid #eaeaea;
}

.page-header h1 {
    font-size: 1.5rem;
    color: #333;
    margin: 0;
    display: flex;
    align-items: center;
    gap: 8px;
}

/* 主要功能區塊 */
.main-functions {
    margin-bottom: 1.5rem;
}

/* 表單樣式 */
.form-container {
    max-width: 500px;
    margin: 1.5rem auto;
    padding: 1.5rem;
    background: white;
    border-radius: 2px;
    box-shadow: 0 1px 2px rgba(0,0,0,0.05);
    border: 1px solid #eaeaea;
}

.form-group {
    margin-bottom: 1.2rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
    color: #333;
    font-size: 0.9rem;
}

.form-group input,
.form-group textarea,
.form-group select {
    width: 100%;
    padding: 0.5rem 0.8rem;
    border: 1px solid #d9d9d9;
    border-radius: 2px;
    font-size: 0.9rem;
    transition: all 0.2s;
    height: 32px;
}

.form-group textarea {
    height: auto;
    min-height: 80px;
}

.form-group input:hover,
.form-group textarea:hover,
.form-group select:hover {
    border-color: #40a9ff;
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
    outline: none;
    border-color: #1890ff;
    box-shadow: 0 0 0 2px rgba(24, 144, 255, 0.2);
}

/* 按鈕樣式 */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.5rem 1rem;
    background: #1890ff;
    color: white;
    text-decoration: none;
    border: none;
    border-radius: 2px;
    cursor: pointer;
    font-size: 0.9rem;
    font-weight: 500;
    transition: all 0.2s;
    height: 32px;
    gap: 5px;
}

.btn:hover {
    background: #40a9ff;
    box-shadow: 0 2px 8px rgba(24, 144, 255, 0.2);
}

.btn-secondary {
    background: #f0f0f0;
    color: #666;
    border: 1px solid #d9d9d9;
}

.btn-secondary:hover {
    background: #fafafa;
    color: #40a9ff;
    border-color: #40a9ff;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.06);
}

.btn-danger {
    background: #ff4d4f;
}

.btn-danger:hover {
    background: #ff7875;
    box-shadow: 0 2px 8px rgba(255, 77, 79, 0.2);
}

.btn-success {
    background: #52c41a;
}

.btn-success:hover {
    background: #73d13d;
    box-shadow: 0 2px 8px rgba(82, 196, 26, 0.2);
}

.btn-lg {
    height: 40px;
    padding: 0.5rem 1.25rem;
    font-size: 1rem;
}

/* 卡片樣式 */
.card {
    background: white;
    border-radius: 2px;
    box-shadow: 0 1px 2px rgba(0,0,0,0.05);
    margin-bottom: 1rem;
    overflow: hidden;
    transition: all 0.3s;
    border: 1px solid #eaeaea;
}

.card:hover {
    box-shadow: 0 2px 10px rgba(0,0,0,0.08);
}

.card-header {
    background: #fafafa;
    color: #333;
    padding: 0.8rem 1.2rem;
    font-weight: 500;
    border-bottom: 1px solid #f0f0f0;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.card-body {
    padding: 1.2rem;
}

.card-footer {
    background: #fafafa;
    padding: 0.8rem 1.2rem;
    border-top: 1px solid #f0f0f0;
}

/* 統計卡片區域 */
.stats-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.stat-card {
    background: white;
    border-radius: 2px;
    padding: 1.2rem;
    display: flex;
    align-items: center;
    box-shadow: 0 1px 2px rgba(0,0,0,0.05);
    border: 1px solid #eaeaea;
}

.stat-icon {
    width: 48px;
    height: 48px;
    border-radius: 4px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-right: 1rem;
    font-size: 1.5rem;
    color: white;
}

.stat-icon.blue {
    background: #1890ff;
}

.stat-icon.green {
    background: #52c41a;
}

.stat-icon.purple {
    background: #722ed1;
}

.stat-icon.orange {
    background: #fa8c16;
}

.stat-content {
    flex: 1;
}

.stat-title {
    font-size: 0.85rem;
    color: #888;
    margin-bottom: 0.3rem;
}

.stat-value {
    font-size: 1.8rem;
    font-weight: 500;
    color: #333;
    line-height: 1;
}

/* 題庫卡片網格 */
.quiz-banks-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 1rem;
    margin-top: 1.5rem;
}

.quiz-bank-card {
    background: white;
    border-radius: 2px;
    box-shadow: 0 1px 2px rgba(0,0,0,0.05);
    border: 1px solid #eaeaea;
    padding: 1.2rem;
    transition: all 0.3s;
}

.quiz-bank-card:hover {
    box-shadow: 0 2px 10px rgba(0,0,0,0.08);
}

.quiz-bank-title {
    font-size: 1.1rem;
    font-weight: 500;
    color: #333;
    margin-bottom: 0.5rem;
}

.quiz-bank-description {
    color: #666;
    margin-bottom: 1rem;
    line-height: 1.4;
    font-size: 0.9rem;
}

.quiz-bank-info {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
    font-size: 0.85rem;
    color: #888;
}

.access-code {
    background: #f5f5f5;
    padding: 3px 6px;
    border-radius: 2px;
    font-family: Consolas, monospace;
    font-weight: 500;
    color: #333;
    font-size: 0.85rem;
}

/* 題目樣式 */
.question-item {
    border: 1px solid #eaeaea;
    border-radius: 2px;
    margin-bottom: 1rem;
    overflow: hidden;
    background: white;
    box-shadow: 0 1px 2px rgba(0,0,0,0.05);
}

.question-header {
    background: #fafafa;
    padding: 0.8rem 1.2rem;
    border-bottom: 1px solid #f0f0f0;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.question-content {
    padding: 1.2rem;
}

.question-type-badge {
    background: #1890ff;
    color: white;
    padding: 2px 8px;
    border-radius: 2px;
    font-size: 0.75rem;
}

/* 選項樣式 */
.option {
    margin: 0.5rem 0;
    padding: 0.7rem 1rem;
    border: 1px solid #d9d9d9;
    border-radius: 2px;
    cursor: pointer;
    transition: all 0.2s;
    position: relative;
}

.option input[type="radio"],
.option input[type="checkbox"] {
    position: absolute;
    left: 1rem;
    top: 0.7rem;
    margin: 0;
}

.option-text {
    display: block;
    white-space: pre !important;
    font-family: Consolas, monospace !important;
    font-size: 13px !important;
    line-height: 1.4 !important;
    padding-left: 1.5rem;
    text-indent: 0 !important;
    margin-left: 0 !important;
    overflow-x: auto;
}

.option-correct {
    display: block;
    color: #27ae60;
    font-weight: bold;
    margin-top: 0.5rem;
    padding-left: 1.5rem;
}

.option:hover {
    border-color: #40a9ff;
    background: #f0f7ff;
}

.option.selected {
    border-color: #1890ff;
    background: #e6f7ff;
}

.option input[type="radio"],
.option input[type="checkbox"] {
    margin-right: 0.5rem;
}

/* Parsons Puzzle 樣式 */
.parsons-container {
    display: flex;
    gap: 2rem;
    margin-top: 1rem;
}

.parsons-bank {
    flex: 1;
    border: 2px dashed #ddd;
    border-radius: 8px;
    padding: 1rem;
    min-height: 300px;
    background: #fafafa;
}

.parsons-bank h4 {
    font-size: 1rem;
    font-weight: 600;
    color: #666;
    margin: 0 0 1rem 0;
}

.parsons-target {
    flex: 1;
    border: 2px dashed #667eea;
    border-radius: 8px;
    padding: 1rem;
    min-height: 300px;
    background: #f8f9ff;
}

.parsons-target h4 {
    font-size: 1rem;
    font-weight: 600;
    color: #667eea;
    margin: 0 0 1rem 0;
}

.code-block {
    background: #2d3748;
    color: #e2e8f0;
    padding: 0.4rem 1rem;
    margin: 0.3rem 0;
    border-radius: 6px;
    font-family: Consolas, monospace;
    cursor: move;
    transition: transform 0.2s, box-shadow 0.2s;
    user-select: none;
    position: relative;
    line-height: 1.4;
    font-size: 14px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
    overflow-x: auto;
    word-wrap: normal;
    word-break: keep-all;
    display: block;
    tab-size: 4;
    height: auto;
    min-height: 0;
}

.code-block span[style*="color: #667eea"] {
    display: inline-block;
    min-width: 25px;
    text-align: left;
    font-weight: bold;
}

.code-block:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(0,0,0,0.2);
}

.code-block.dragging {
    opacity: 0.5;
    transform: rotate(5deg);
}

/* 移除正確程式碼塊的顏色區分 */
.code-block.correct-block {
    background: #2d3748;
}

/* 移除干擾項程式碼塊的顏色區分 */
.code-block.distractor-block {
    background: #2d3748;
}

/* 答案區塊樣式 */
.answer-slot {
    border: 2px dashed #bbb;
    border-radius: 8px;
    margin: 0.5rem 0;
    min-height: 60px;
    display: flex;
    align-items: center;
    padding: 0.5rem;
    background: white;
    transition: all 0.3s;
    position: relative;
}

.answer-slot:hover {
    border-color: #667eea;
    background: #f0f4ff;
}

.answer-slot.slot-occupied {
    border: 2px solid #27ae60;
    background: #e8f5e8;
}

.answer-slot.slot-highlight {
    border-color: #667eea;
    background: #e6efff;
    transform: scale(1.02);
}

.slot-number {
    min-width: 30px;
    height: 30px;
    background: #667eea;
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: bold;
    font-size: 0.9rem;
    margin-right: 1rem;
}

.slot-content {
    flex: 1;
    color: #999;
    font-style: italic;
    display: flex;
    align-items: center;
    min-height: 40px;
}

.answer-slot .code-block {
    margin: 0;
    width: 100%;
    cursor: default;
    background: #2d3748;
    box-shadow: 0 2px 6px rgba(0,0,0,0.15);
    overflow-x: auto;
    word-wrap: normal;
    word-break: keep-all;
    display: block;
    tab-size: 4;
    padding: 0.4rem 1rem;
    height: auto;
    min-height: 0;
    line-height: 1.4;
}

.answer-slot .code-block:hover {
    transform: none;
    box-shadow: 0 2px 6px rgba(0,0,0,0.15);
}

.answer-slot.slot-occupied .code-block {
    background: #2d3748;
}

/* 拖放時的視覺效果 */
.drop-zone.drag-over {
    background: #e6efff;
    border-color: #667eea;
}

/* 下拉選單填空題樣式 */
.dropdown-fillblank-container {
    padding: 1rem;
    background: #f8f9fa;
    border-radius: 8px;
    margin: 1rem 0;
}

.fillblank-text {
    line-height: 2;
    font-size: 1.1rem;
}

.fillblank-text select {
    margin: 0 0.25rem;
    padding: 0.4rem 0.6rem;
    border: 2px solid #ddd;
    border-radius: 4px;
    font-size: 1rem;
    background: white;
    cursor: pointer;
    transition: border-color 0.3s;
}

.fillblank-text select:hover {
    border-color: #667eea;
}

.fillblank-text select:focus {
    outline: none;
    border-color: #667eea;
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

.answer-slot.drag-over {
    border-color: #27ae60;
    background: #e8f5e8;
    transform: scale(1.05);
}

/* 響應式設計 */
@media (max-width: 992px) {
    .stats-cards {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .container {
        flex-direction: column;
    }
    
    .navbar {
        width: 100%;
        height: auto;
        position: relative;
        flex-direction: column;
        box-shadow: 0 2px 8px rgba(0,0,0,0.1);
    }
    
    .navbar .nav-links {
        width: 100%;
        padding: 0;
    }
    
    .navbar a {
        padding: 0.8rem 1rem;
    }
    
    .content {
        margin-left: 0;
        padding: 1rem;
    }
    
    .quiz-banks-grid {
        grid-template-columns: 1fr;
    }
    
    .parsons-container {
        flex-direction: column;
    }
    
    .parsons-preview-container {
        flex-direction: column !important;
    }
    
    .parsons-bank,
    .parsons-target,
    .parsons-preview-bank,
    .parsons-preview-target {
        min-height: 200px !important;
    }
    
    .stats-cards {
        grid-template-columns: 1fr;
    }
}

/* 載入動畫 */
.loading {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 3px solid #f3f3f3;
    border-top: 3px solid #667eea;
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* 提示訊息 */
.alert {
    padding: 1rem;
    border-radius: 8px;
    margin-bottom: 1rem;
}

.alert-success {
    background: #d4edda;
    border: 1px solid #c3e6cb;
    color: #155724;
}

.alert-error {
    background: #f8d7da;
    border: 1px solid #f5c6cb;
    color: #721c24;
}

.alert-info {
    background: #d1ecf1;
    border: 1px solid #bee5eb;
    color: #0c5460;
}