/* ==================== 
   課程頁面樣式
==================== */

/* 課程導航欄 */
.lesson-nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    padding: 1rem 2rem;
    border-bottom: 1px solid rgba(0, 217, 255, 0.2);
}

.lesson-nav .nav-content {
    max-width: 1600px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.back-btn {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--energy-cyan);
    text-decoration: none;
    font-weight: 500;
    transition: all 0.3s;
}

.back-btn:hover {
    transform: translateX(-5px);
}

.lesson-progress {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--star-white);
}

.lesson-nav-buttons {
    display: flex;
    gap: 1rem;
}

.nav-btn {
    padding: 0.5rem 1.5rem;
    background: rgba(0, 217, 255, 0.1);
    border: 1px solid var(--energy-cyan);
    border-radius: 8px;
    color: var(--energy-cyan);
    text-decoration: none;
    font-weight: 500;
    transition: all 0.3s;
}

.nav-btn:hover {
    background: rgba(0, 217, 255, 0.2);
    transform: translateY(-2px);
}

/* 課程容器 */
.lesson-container {
    max-width: 1600px;
    margin: 0 auto;
    padding: 6rem 2rem 4rem;
    display: grid;
    grid-template-columns: 250px 1fr;
    gap: 3rem;
}

/* 側邊欄 */
.lesson-sidebar {
    position: sticky;
    top: 6rem;
    height: fit-content;
    padding: 2rem;
    border-radius: 15px;
    border: 1px solid rgba(0, 217, 255, 0.2);
}

.sidebar-title {
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--energy-cyan);
    margin-bottom: 1.5rem;
}

.sidebar-nav {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.sidebar-link {
    padding: 0.8rem 1rem;
    color: var(--star-white);
    text-decoration: none;
    border-radius: 8px;
    transition: all 0.3s;
    border-left: 3px solid transparent;
}

.sidebar-link:hover {
    background: rgba(0, 217, 255, 0.1);
    border-left-color: var(--energy-cyan);
}

.sidebar-link.active {
    background: rgba(0, 217, 255, 0.2);
    border-left-color: var(--energy-cyan);
    font-weight: 600;
}

/* 課程內容 */
.lesson-content {
    max-width: 900px;
}

/* 課程標題 */
.lesson-header {
    margin-bottom: 3rem;
}

.lesson-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 1.5rem;
    background: rgba(0, 217, 255, 0.1);
    border: 1px solid var(--energy-cyan);
    border-radius: 50px;
    margin-bottom: 1.5rem;
}

.lesson-title {
    font-size: clamp(2rem, 5vw, 3rem);
    font-weight: 900;
    margin-bottom: 1.5rem;
    line-height: 1.2;
}

.lesson-meta {
    display: flex;
    gap: 2rem;
    flex-wrap: wrap;
}

.meta-item {
    color: var(--star-white);
    opacity: 0.8;
    font-size: 0.95rem;
}

/* 內容區塊 */
.content-section {
    margin-bottom: 4rem;
}

.section-heading {
    display: flex;
    align-items: center;
    gap: 1rem;
    font-size: 2rem;
    font-weight: 700;
    color: var(--energy-cyan);
    margin-bottom: 1.5rem;
}

.heading-icon {
    font-size: 2.5rem;
}

.content-box {
    padding: 2rem;
    border-radius: 15px;
    border: 1px solid rgba(0, 217, 255, 0.2);
    line-height: 1.8;
}

.content-box p {
    margin-bottom: 1rem;
}

.content-box ul,
.content-box ol {
    margin-left: 2rem;
    margin-bottom: 1rem;
}

.content-box li {
    margin-bottom: 0.5rem;
}

/* 任務目標 */
.mission-objectives {
    margin-top: 2rem;
    padding: 1.5rem;
    background: rgba(0, 217, 255, 0.05);
    border-left: 4px solid var(--energy-cyan);
    border-radius: 8px;
}

.mission-objectives h3 {
    color: var(--energy-cyan);
    margin-bottom: 1rem;
}

/* 知識卡片 */
.knowledge-card {
    padding: 2rem;
    border-radius: 15px;
    border: 1px solid rgba(0, 217, 255, 0.2);
    margin-bottom: 2rem;
}

.knowledge-title {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--energy-cyan);
    margin-bottom: 1rem;
}

/* 比較框 */
.comparison-box {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 1.5rem;
    margin-top: 2rem;
}

.comparison-item {
    padding: 1.5rem;
    border-radius: 10px;
    border: 2px solid;
}

.comparison-item.danger {
    border-color: var(--danger-red);
    background: rgba(255, 51, 102, 0.05);
}

.comparison-item.success {
    border-color: var(--success-green);
    background: rgba(0, 255, 136, 0.05);
}

.comparison-item h4 {
    margin-bottom: 1rem;
    font-size: 1.1rem;
}

/* 程式碼區塊 */
pre {
    background: #1e1e1e !important;
    border-radius: 10px;
    padding: 1.5rem !important;
    overflow-x: auto;
    font-family: 'Fira Code', monospace;
    font-size: 0.9rem;
    line-height: 1.8;
    border: 1px solid rgba(0, 217, 255, 0.2);
    position: relative;
}

code {
    font-family: 'Fira Code', monospace;
    display: block;
}

/* 程式碼行號樣式 */
.code-line {
    display: block;
    position: relative;
    padding-left: 0;
    line-height: 1.8;
}

.line-number {
    display: inline-block;
    min-width: 3rem;
    margin-right: 1ch;  /* 使用 1ch 單位，剛好一個字元寬度 */
    text-align: right;
    color: rgba(255, 255, 255, 0.3);
    user-select: none;
    font-weight: 500;
    vertical-align: top;
}

.code-content {
    display: inline;
    white-space: pre;
    word-break: keep-all;
}

/* 重點行樣式 */
.code-line.highlight-key {
    background: rgba(0, 217, 255, 0.08);
    border-left: 3px solid var(--energy-cyan);
    padding-left: 0.5rem;
}

.code-line.highlight-key .line-number {
    color: var(--energy-cyan);
    font-weight: 700;
}

.code-line.highlight-important {
    background: rgba(168, 85, 247, 0.08);
    border-left: 3px solid var(--energy-purple);
    padding-left: 0.5rem;
}

.code-line.highlight-important .line-number {
    color: var(--energy-purple);
    font-weight: 700;
}

.code-line.highlight-warning {
    background: rgba(255, 184, 0, 0.08);
    border-left: 3px solid var(--warning-amber);
    padding-left: 0.5rem;
}

.code-line.highlight-warning .line-number {
    color: var(--warning-amber);
    font-weight: 700;
}

.code-line.highlight-success {
    background: rgba(0, 255, 136, 0.08);
    border-left: 3px solid var(--success-green);
    padding-left: 0.5rem;
}

.code-line.highlight-success .line-number {
    color: var(--success-green);
    font-weight: 700;
}

/* 程式碼註解標籤 */
.code-annotation {
    display: inline-block;
    margin-left: 1rem;
    padding: 0.2rem 0.6rem;
    border-radius: 12px;
    font-size: 0.7rem;
    font-weight: 600;
    white-space: nowrap;
    opacity: 0.9;
    vertical-align: middle;
}

.code-annotation.key {
    background: rgba(0, 217, 255, 0.2);
    color: var(--energy-cyan);
    border: 1px solid var(--energy-cyan);
}

.code-annotation.important {
    background: rgba(168, 85, 247, 0.2);
    color: var(--energy-purple);
    border: 1px solid var(--energy-purple);
}

.code-annotation.warning {
    background: rgba(255, 184, 0, 0.2);
    color: var(--warning-amber);
    border: 1px solid var(--warning-amber);
}

.code-annotation.success {
    background: rgba(0, 255, 136, 0.2);
    color: var(--success-green);
    border: 1px solid var(--success-green);
}

/* 範例卡片 */
.example-card {
    padding: 2rem;
    border-radius: 15px;
    border: 1px solid rgba(0, 217, 255, 0.2);
    margin-bottom: 2rem;
}

.example-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
}

.example-title {
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--energy-cyan);
}

.copy-btn {
    padding: 0.5rem 1rem;
    background: rgba(0, 217, 255, 0.1);
    border: 1px solid var(--energy-cyan);
    border-radius: 8px;
    color: var(--energy-cyan);
    cursor: pointer;
    transition: all 0.3s;
    font-size: 0.9rem;
}

.copy-btn:hover {
    background: rgba(0, 217, 255, 0.2);
    transform: scale(1.05);
}

/* 輸入輸出範例 */
.example-io {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
    margin-top: 1.5rem;
}

.io-box {
    padding: 1rem;
    background: rgba(0, 217, 255, 0.05);
    border-radius: 8px;
    border: 1px solid rgba(0, 217, 255, 0.2);
}

.io-box h4 {
    color: var(--energy-cyan);
    margin-bottom: 0.5rem;
    font-size: 0.95rem;
}

.io-box pre {
    background: rgba(0, 0, 0, 0.3) !important;
    padding: 1rem !important;
    margin: 0;
}

/* 解說框 */
.explanation-box {
    padding: 2rem;
    border-radius: 15px;
    border: 1px solid rgba(0, 217, 255, 0.2);
}

.explanation-box h3 {
    color: var(--energy-cyan);
    font-size: 1.5rem;
    margin-bottom: 1.5rem;
}

.tech-point {
    margin-bottom: 2rem;
}

.tech-point h4 {
    color: var(--energy-cyan);
    font-size: 1.2rem;
    margin-bottom: 1rem;
}

/* 效能表格 */
.performance-table {
    margin-top: 2rem;
}

.performance-table h4 {
    color: var(--energy-cyan);
    margin-bottom: 1rem;
}

table {
    width: 100%;
    border-collapse: collapse;
    background: rgba(0, 0, 0, 0.2);
    border-radius: 10px;
    overflow: hidden;
}

thead {
    background: rgba(0, 217, 255, 0.1);
}

th, td {
    padding: 1rem;
    text-align: left;
    border-bottom: 1px solid rgba(0, 217, 255, 0.1);
}

th {
    color: var(--energy-cyan);
    font-weight: 600;
}

tr.highlight {
    background: rgba(0, 255, 136, 0.05);
}

/* Quiz 區塊 */
.quiz-box {
    padding: 2rem;
    border-radius: 15px;
    border: 2px solid var(--warning-amber);
    background: rgba(255, 184, 0, 0.05);
}

.quiz-box h3 {
    color: var(--warning-amber);
    font-size: 1.5rem;
    margin-bottom: 1rem;
}

.quiz-io {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
    margin: 2rem 0;
}

.show-solution-btn {
    padding: 1rem 2rem;
    background: linear-gradient(135deg, var(--energy-cyan), var(--energy-purple));
    color: var(--space-black);
    border: none;
    border-radius: 10px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s;
    margin-top: 1.5rem;
}

.show-solution-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 20px rgba(0, 217, 255, 0.4);
}

/* 解答區塊 */
.solution-box {
    padding: 2rem;
    border-radius: 15px;
    border: 2px solid var(--success-green);
    background: rgba(0, 255, 136, 0.05);
}

.solution-explanation {
    margin-top: 2rem;
    padding: 1.5rem;
    background: rgba(0, 0, 0, 0.2);
    border-radius: 10px;
}

.solution-explanation h3 {
    color: var(--success-green);
    margin-bottom: 1rem;
}

.solution-hidden {
    display: none;
}

/* 完成徽章 */
.completion-badge {
    padding: 3rem;
    border-radius: 15px;
    border: 2px solid var(--success-green);
    text-align: center;
    margin: 4rem 0;
}

.badge-content {
    max-width: 600px;
    margin: 0 auto;
}

.badge-content .badge-icon {
    font-size: 4rem;
    margin-bottom: 1rem;
}

.badge-content h3 {
    font-size: 2rem;
    color: var(--success-green);
    margin-bottom: 1rem;
}

.completion-skills {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
    margin-top: 1.5rem;
}

.skill-tag {
    padding: 0.5rem 1rem;
    background: rgba(0, 255, 136, 0.1);
    border: 1px solid var(--success-green);
    border-radius: 20px;
    font-size: 0.9rem;
}

/* 課程導航 */
.lesson-navigation {
    display: flex;
    justify-content: space-between;
    gap: 1rem;
    margin-top: 4rem;
}

.lesson-navigation .nav-btn {
    flex: 1;
    text-align: center;
    padding: 1rem 2rem;
}

.lesson-navigation .home-btn {
    flex: 0.5;
}

/* 響應式設計 */
@media (max-width: 1024px) {
    .lesson-container {
        grid-template-columns: 1fr;
    }
    
    .lesson-sidebar {
        position: relative;
        top: 0;
    }
}

@media (max-width: 768px) {
    .lesson-nav .nav-content {
        flex-direction: column;
        gap: 1rem;
    }
    
    .comparison-box,
    .example-io,
    .quiz-io {
        grid-template-columns: 1fr;
    }
    
    .lesson-navigation {
        flex-direction: column;
    }
}