/* AI 세미나 자료 - 통합 스타일 시스템 */

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    font-size: 16px;
    line-height: 1.6;
    color: #2c3e50;
    background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
    min-height: 100vh;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 40px 20px;
}

/* 헤더 */
.header {
    text-align: center;
    margin-bottom: 50px;
    padding: 40px 30px;
    background: rgba(255, 255, 255, 0.95);
    border-radius: 12px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
}

.header h1 {
    font-size: 2.5em;
    font-weight: 600;
    color: #2c3e50;
    margin-bottom: 15px;
}

.header .subtitle {
    font-size: 1.2em;
    color: #7f8c8d;
    font-weight: 400;
}

.highlight {
    color: #3498db;
    font-weight: 600;
}

/* 백 링크 */
.back-link {
    display: inline-block;
    margin-bottom: 30px;
    padding: 10px 20px;
    background: #3498db;
    color: white;
    text-decoration: none;
    border-radius: 6px;
    font-weight: 500;
    transition: background 0.3s ease;
}

.back-link:hover {
    background: #2980b9;
}

/* 섹션 */
.section {
    background: rgba(255, 255, 255, 0.95);
    border-radius: 12px;
    padding: 40px;
    margin-bottom: 30px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
    border-left: 4px solid #ecf0f1;
}

.section.featured {
    border-left-color: #3498db;
}

.section h2 {
    font-size: 1.8em;
    color: #2c3e50;
    margin-bottom: 20px;
    font-weight: 600;
}

.section h3 {
    font-size: 1.4em;
    color: #34495e;
    margin: 30px 0 15px 0;
    font-weight: 600;
}

.section h4 {
    font-size: 1.2em;
    color: #34495e;
    margin: 20px 0 10px 0;
    font-weight: 600;
}

.section p {
    margin-bottom: 15px;
    line-height: 1.7;
}

.section ul, .section ol {
    margin: 15px 0 15px 25px;
}

.section li {
    margin-bottom: 8px;
    line-height: 1.6;
}

/* 인용구 */
blockquote {
    background: #f8f9fa;
    border-left: 4px solid #3498db;
    padding: 20px;
    margin: 20px 0;
    border-radius: 0 8px 8px 0;
    font-style: italic;
}

/* 알림 박스 */
.alert {
    padding: 15px 20px;
    border-radius: 8px;
    margin: 20px 0;
    border-left: 4px solid;
}

.alert-success {
    background: #d4edda;
    border-left-color: #28a745;
    color: #155724;
}

.alert-info {
    background: #d1ecf1;
    border-left-color: #17a2b8;
    color: #0c5460;
}

.alert-warning {
    background: #fff3cd;
    border-left-color: #ffc107;
    color: #856404;
}

/* 기술 그리드 */
.tech-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 20px;
    margin: 30px 0;
}

.tech-card {
    background: #f8f9fa;
    border: 1px solid #e9ecef;
    border-radius: 8px;
    padding: 25px;
    transition: all 0.3s ease;
}

.tech-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.1);
    border-color: #3498db;
}

.tech-card h3 {
    color: #2c3e50;
    margin-bottom: 12px;
    font-size: 1.1em;
    font-weight: 600;
}

.tech-card p {
    color: #5a6c7d;
    font-size: 0.95em;
    line-height: 1.5;
    margin: 0;
}

/* 상태 배지 */
.status-badge {
    display: inline-block;
    padding: 4px 10px;
    border-radius: 15px;
    font-size: 0.75em;
    font-weight: 500;
    margin-left: 8px;
}

.status-implemented {
    background: #d4edda;
    color: #155724;
}

.status-demo {
    background: #cce5ff;
    color: #004085;
}

/* 네비게이션 링크 */
.nav-links {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 15px;
    margin-top: 30px;
}

.nav-link {
    display: block;
    padding: 20px;
    background: #ffffff;
    border: 1px solid #e9ecef;
    border-radius: 8px;
    text-decoration: none;
    color: #2c3e50;
    transition: all 0.3s ease;
    text-align: center;
}

.nav-link:hover {
    background: #f8f9fa;
    border-color: #3498db;
    transform: translateY(-1px);
}

.nav-link h4 {
    margin-bottom: 8px;
    color: #2c3e50;
    font-weight: 600;
}

.nav-link p {
    font-size: 0.9em;
    color: #6c757d;
    margin: 0;
}

/* 목차 전용 스타일 */
.toc-links {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 12px;
    margin-top: 25px;
    background: rgba(52, 152, 219, 0.05);
    padding: 25px;
    border-radius: 12px;
    border: 2px solid rgba(52, 152, 219, 0.1);
}

.toc-link {
    display: block;
    padding: 15px 18px;
    background: linear-gradient(135deg, #ffffff 0%, #f8f9fa 100%);
    border: 1px solid rgba(52, 152, 219, 0.2);
    border-left: 4px solid #3498db;
    border-radius: 6px;
    text-decoration: none;
    color: #2c3e50;
    transition: all 0.2s ease;
    text-align: left;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.05);
}

.toc-link:hover {
    background: linear-gradient(135deg, #3498db 0%, #2980b9 100%);
    border-color: #2980b9;
    border-left-color: #2980b9;
    color: #ffffff;
    transform: translateX(3px);
    box-shadow: 0 4px 8px rgba(52, 152, 219, 0.3);
}

.toc-link h4 {
    margin-bottom: 5px;
    color: inherit;
    font-weight: 600;
    font-size: 1em;
}

.toc-link p {
    font-size: 0.85em;
    color: inherit;
    margin: 0;
    opacity: 0.8;
}

.toc-link:hover h4,
.toc-link:hover p {
    color: #ffffff;
    opacity: 1;
}

/* 통계 */
.stats {
    display: flex;
    justify-content: space-around;
    background: #2c3e50;
    color: white;
    padding: 30px;
    border-radius: 12px;
    margin: 40px 0;
    flex-wrap: wrap;
    gap: 20px;
}

.stat-item {
    text-align: center;
    flex: 1;
    min-width: 120px;
}

.stat-number {
    font-size: 2em;
    font-weight: 700;
    color: #3498db;
    display: block;
}

.stat-label {
    font-size: 0.9em;
    color: #bdc3c7;
    margin-top: 5px;
}

/* 테이블 */
table {
    width: 100%;
    border-collapse: collapse;
    background: white;
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    margin: 20px 0;
}

th, td {
    padding: 12px 15px;
    text-align: left;
    border-bottom: 1px solid #e9ecef;
}

th {
    background: #f8f9fa;
    font-weight: 600;
    color: #2c3e50;
}

tr:hover {
    background: #f8f9fa;
}

/* JSON 포맷 스타일링 */
.json-block {
    background: #1e1e1e;
    color: #d4d4d4;
    padding: 20px;
    border-radius: 8px;
    overflow-x: auto;
    margin: 20px 0;
    font-family: 'Monaco', 'Menlo', 'Ubuntu Mono', monospace;
    font-size: 14px;
    line-height: 1.6;
    border: 1px solid #404040;
    position: relative;
}

.json-block::before {
    content: "JSON";
    position: absolute;
    top: 8px;
    right: 12px;
    background: #007acc;
    color: white;
    padding: 2px 8px;
    border-radius: 4px;
    font-size: 10px;
    font-weight: bold;
}

/* JSON 구문 강조 */
.json-key {
    color: #9cdcfe;
}

.json-string {
    color: #ce9178;
}

.json-number {
    color: #b5cea8;
}

.json-boolean {
    color: #569cd6;
}

.json-null {
    color: #569cd6;
}

.json-bracket {
    color: #ffd700;
    font-weight: bold;
}

.json-comma {
    color: #d4d4d4;
}

/* 코드 블록 */
pre {
    background: #2d3748;
    color: #e2e8f0;
    padding: 20px;
    border-radius: 8px;
    overflow-x: auto;
    margin: 20px 0;
    font-family: 'Monaco', 'Menlo', 'Ubuntu Mono', monospace;
    font-size: 14px;
    line-height: 1.5;
    border: 1px solid #4a5568;
    position: relative;
}

/* 코드 타입별 라벨 */
pre[data-lang]::before {
    content: attr(data-lang);
    position: absolute;
    top: 8px;
    right: 12px;
    background: #4a5568;
    color: #e2e8f0;
    padding: 2px 8px;
    border-radius: 4px;
    font-size: 10px;
    font-weight: bold;
    text-transform: uppercase;
}

pre[data-lang="json"]::before {
    background: #007acc;
}

pre[data-lang="bash"]::before {
    background: #4caf50;
}

pre[data-lang="javascript"]::before {
    background: #f7df1e;
    color: #000;
}

code {
    background: #f7fafc;
    color: #2d3748;
    padding: 2px 6px;
    border-radius: 4px;
    font-family: 'Monaco', 'Menlo', 'Ubuntu Mono', monospace;
    font-size: 0.9em;
    border: 1px solid #e2e8f0;
}

pre code {
    background: transparent;
    color: inherit;
    padding: 0;
    border: none;
    font-size: inherit;
}

/* 명령어 박스 */
.command-box {
    background: #1a202c;
    border: 2px solid #2d3748;
    border-radius: 8px;
    padding: 20px;
    margin: 20px 0;
}

.command-box h3 {
    color: #63b3ed;
    margin-bottom: 15px;
    font-size: 1.1em;
}

.command-box pre {
    background: #2d3748;
    margin: 0;
    border: none;
}

/* 결과 박스 */
.result-box {
    background: #f7fafc;
    border: 2px solid #e2e8f0;
    border-radius: 8px;
    padding: 20px;
    margin: 20px 0;
}

.result-box.success {
    background: #f0fff4;
    border-color: #68d391;
}

.result-box.error {
    background: #fed7d7;
    border-color: #fc8181;
}

/* 비교 박스 */
.comparison {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
    margin: 20px 0;
}

.expected, .actual {
    padding: 15px;
    border-radius: 8px;
}

.expected {
    background: #f0fff4;
    border: 2px solid #68d391;
}

.actual {
    background: #fed7d7;
    border: 2px solid #fc8181;
}

/* 설정 박스 */
.config-box {
    background: #edf2f7;
    border: 2px solid #cbd5e0;
    border-radius: 8px;
    padding: 20px;
    margin: 20px 0;
}

.config-box h3 {
    color: #2d3748;
    margin-bottom: 15px;
}

/* 설명 박스 */
.explanation-box {
    background: #f7fafc;
    border-left: 4px solid #4299e1;
    padding: 20px;
    margin: 20px 0;
    border-radius: 0 8px 8px 0;
}

.component {
    margin: 20px 0;
    padding: 15px;
    background: white;
    border-radius: 6px;
    border: 1px solid #e2e8f0;
}

.component h4 {
    color: #2d3748;
    margin-bottom: 10px;
    font-family: 'Monaco', 'Menlo', 'Ubuntu Mono', monospace;
    font-size: 1em;
}

/* 인사이트 박스 */
.insight-box {
    background: #fffaf0;
    border: 2px solid #fbd38d;
    border-radius: 8px;
    padding: 20px;
    margin: 20px 0;
}

.insight-box h3 {
    color: #c05621;
    margin-bottom: 10px;
}

/* 문제/해결 박스 */
.problem-box {
    background: #fed7d7;
    border: 2px solid #fc8181;
    border-radius: 8px;
    padding: 20px;
    margin: 20px 0;
}

.solution-box {
    background: #f0fff4;
    border: 2px solid #68d391;
    border-radius: 8px;
    padding: 20px;
    margin: 20px 0;
}

/* 액션 박스 */
.action-box {
    background: #ebf8ff;
    border: 2px solid #63b3ed;
    border-radius: 8px;
    padding: 20px;
    margin: 20px 0;
}

/* 명령어 시퀀스 */
.command-sequence {
    margin: 20px 0;
}

.command-step {
    margin: 15px 0;
    padding: 15px;
    background: #f7fafc;
    border-left: 4px solid #4299e1;
    border-radius: 0 8px 8px 0;
}

.command-step h4 {
    color: #2d3748;
    margin-bottom: 10px;
    font-size: 1em;
}

/* 체크리스트 */
.checklist {
    margin: 20px 0;
}

.todo-item {
    display: flex;
    align-items: center;
    margin: 10px 0;
    padding: 10px;
    background: #f7fafc;
    border-radius: 6px;
}

.todo-item input[type="checkbox"] {
    margin-right: 10px;
    transform: scale(1.2);
}

.todo-item label {
    font-weight: 500;
    color: #2d3748;
}

/* 체크 아이템 */
.check-item {
    margin: 15px 0;
    padding: 15px;
    background: #f0fff4;
    border-left: 4px solid #68d391;
    border-radius: 0 8px 8px 0;
}

.check-item h4 {
    color: #22543d;
    margin-bottom: 8px;
}

/* 문제해결 섹션 */
.troubleshooting {
    background: #f7fafc;
    border: 2px solid #cbd5e0;
    border-radius: 8px;
    padding: 20px;
    margin: 20px 0;
}

/* 비교 그리드 */
.comparison-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
    margin: 20px 0;
}

.old-method, .new-method {
    padding: 20px;
    border-radius: 8px;
}

.old-method {
    background: #fed7d7;
    border: 2px solid #fc8181;
}

.new-method {
    background: #f0fff4;
    border: 2px solid #68d391;
}

/* 인사이트 카드 */
.insight-card {
    background: white;
    border: 1px solid #e2e8f0;
    border-radius: 8px;
    padding: 20px;
    margin: 15px 0;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.insight-card h3 {
    color: #2d3748;
    margin-bottom: 15px;
    font-size: 1.1em;
}

/* 반응형 */
@media (max-width: 768px) {
    .container {
        padding: 15px 10px;
    }
    
    .header {
        padding: 25px 20px;
        margin-bottom: 30px;
    }
    
    .header h1 {
        font-size: 1.8em;
        line-height: 1.2;
        margin-bottom: 10px;
    }
    
    .header .subtitle {
        font-size: 1em;
        line-height: 1.4;
    }
    
    .section {
        padding: 20px 15px;
        margin-bottom: 20px;
    }
    
    .section h2 {
        font-size: 1.4em;
        margin-bottom: 15px;
    }
    
    .stats {
        flex-direction: column;
        text-align: center;
    }
    
    .tech-grid {
        grid-template-columns: 1fr;
    }
    
    .nav-links {
        grid-template-columns: 1fr;
        gap: 0.8rem;
    }
    
    .nav-link {
        padding: 15px;
    }
    
    .nav-link h4 {
        font-size: 1rem;
        line-height: 1.3;
    }
    
    .nav-link p {
        font-size: 0.85rem;
        line-height: 1.3;
    }
    
    .comparison {
        grid-template-columns: 1fr;
    }
    
    .comparison-grid {
        grid-template-columns: 1fr;
    }
    
    pre {
        font-size: 12px;
        padding: 15px;
    }
}
/* 책 목차 스타일 */
.book-toc {
    max-width: 1200px;
    margin: 0;
    background: #fff;
    border-radius: 12px;
    box-shadow: 0 4px 20px rgba(0,0,0,0.08);
    padding: 2rem;
    display: grid;
    grid-template-columns: 1fr;
    gap: 0;
}

@media (min-width: 1024px) {
    .book-toc {
        grid-template-columns: 1fr 1fr;
        gap: 2rem;
    }
}

.book-toc .toc-item {
    border-bottom: 1px solid #f0f0f0;
    transition: all 0.3s ease;
}

.book-toc .toc-item:last-child {
    border-bottom: none;
}

.book-toc .toc-item:hover {
    background: #f8f9fa;
    transform: translateX(8px);
}

.book-toc .toc-item a {
    display: flex;
    align-items: flex-start;
    padding: 1.2rem 0;
    text-decoration: none;
    color: inherit;
    gap: 1rem;
}

.book-toc .toc-content {
    display: flex;
    flex-direction: column;
    gap: 0.3rem;
    flex: 1;
}

.book-toc .toc-number {
    font-size: 1.2rem;
    min-width: 2rem;
    text-align: center;
    padding: 0.3rem 0.5rem;
}

.book-toc .toc-title {
    font-size: 1.1rem;
    font-weight: 600;
    color: #2c3e50;
}

.book-toc .toc-desc {
    font-size: 0.9rem;
    color: #6c757d;
    line-height: 1.4;
}

.book-toc .toc-item:hover .toc-title {
    color: #007bff;
}

@media (max-width: 768px) {
    .book-toc {
        padding: 1rem;
        gap: 0;
    }
    
    .book-toc .toc-item a {
        flex-direction: row;
        align-items: flex-start;
        gap: 0.75rem;
        padding: 1rem 0.5rem;
    }
    
    .book-toc .toc-number {
        font-size: 1.1rem;
        min-width: 1.8rem;
        flex-shrink: 0;
        text-align: left;
        padding: 0;
        margin-top: 0.1rem;
    }
    
    .book-toc .toc-content {
        gap: 0.2rem;
        flex: 1;
        min-width: 0;
    }
    
    .book-toc .toc-title {
        font-size: 0.95rem;
        line-height: 1.3;
        word-break: keep-all;
        overflow-wrap: break-word;
    }
    
    .book-toc .toc-desc {
        font-size: 0.85rem;
        line-height: 1.3;
        word-break: keep-all;
        overflow-wrap: break-word;
    }
    
    /* 모바일에서 hover 효과 조정 */
    .book-toc .toc-item:hover {
        transform: none;
        background: #f8f9fa;
    }
}
.book-toc .toc-stats {
    display: flex;
    gap: 0.8rem;
    margin-left: auto;
    align-items: center;
}

.book-toc .stat-item {
    font-size: 0.8rem;
    color: #6c757d;
    font-weight: 500;
    white-space: nowrap;
}

.book-toc .toc-item:hover .stat-item {
    color: #495057;
}