*,*:before,*:after{margin:0;padding:0;box-sizing:border-box}#ts-app{--bg-dark: #1a1a2e;--bg-darker: #16162a;--bg-card: #222240;--bg-card-hover: #2a2a4a;--bg-input: #2c2c4a;--text-primary: #f0f0f5;--text-secondary: #a0a0b8;--text-muted: #707088;--accent-blue: #4a9eff;--accent-blue-hover: #3a8eef;--accent-green: #4ecb71;--accent-red: #e74c3c;--accent-red-bg: rgba(231, 76, 60, .1);--accent-red-border: rgba(231, 76, 60, .3);--border-color: #333355;--border-light: #444466;--radius-sm: 6px;--radius-md: 10px;--radius-lg: 14px;--font-sans: "Helvetica Neue", Arial, "Hiragino Kaku Gothic ProN", sans-serif;font-family:var(--font-sans);background:var(--bg-dark);color:var(--text-primary);min-height:100vh;line-height:1.6}#ts-app a{color:inherit;text-decoration:none}#ts-app button{font-family:var(--font-sans)}#ts-app .ts-error-text{color:#e74c3c;padding:8px 0;font-size:.9rem}#ts-app .ts-not-found{text-align:center;padding-top:80px}#ts-app .ts-status{padding:40px 24px;text-align:center;font-size:.95rem}#ts-app .ts-status--loading{color:var(--text-muted)}#ts-app .ts-status--error{color:#e74c3c}#ts-app .ts-header{background:var(--bg-darker);border-bottom:1px solid var(--border-color);position:sticky;top:0;z-index:100}#ts-app .header-inner{max-width:1200px;margin:0 auto;padding:0 24px;height:56px;display:flex;align-items:center;justify-content:space-between;gap:16px}#ts-app .header-logo{display:flex;align-items:center;gap:8px;flex-shrink:0}#ts-app .logo-icon{font-size:1.4rem}#ts-app .logo-text{font-size:1.1rem;font-weight:700;letter-spacing:.02em}#ts-app .header-user{display:flex;align-items:center;gap:8px;flex-shrink:0}#ts-app .user-avatar{width:32px;height:32px;border-radius:50%;background:var(--accent-blue);color:#fff;display:flex;align-items:center;justify-content:center;font-size:.8rem;font-weight:600}#ts-app .header-nav-link{font-size:.82rem;color:var(--text-secondary);padding:6px 12px;border:1px solid var(--border-color);border-radius:var(--radius-sm);transition:color .2s,border-color .2s}#ts-app .header-nav-link:hover{color:var(--accent-blue);border-color:var(--accent-blue)}#ts-app .ts-footer{border-top:1px solid var(--border-color);text-align:center;padding:24px;margin-top:60px}#ts-app .footer-text{font-size:.8rem;color:var(--text-muted)}#ts-app .ts-main{max-width:1200px;margin:0 auto;padding:40px 24px}#ts-app .page-hero{margin-bottom:40px}#ts-app .page-title{font-size:clamp(1.5rem,4vw,2rem);font-weight:700;margin-bottom:8px}#ts-app .page-subtitle{font-size:1rem;color:var(--text-secondary)}#ts-app .instructor-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(360px,1fr));gap:24px}#ts-app .instructor-card{background:var(--bg-card);border:1px solid var(--border-color);border-radius:var(--radius-lg);padding:28px;display:flex;gap:20px;transition:background .2s,border-color .2s;cursor:pointer}#ts-app .instructor-card:hover{background:var(--bg-card-hover);border-color:var(--accent-blue)}#ts-app .instructor-avatar{flex-shrink:0}#ts-app .avatar-letter{width:56px;height:56px;border-radius:50%;background:var(--accent-blue);color:#fff;display:flex;align-items:center;justify-content:center;font-size:1.4rem;font-weight:700}#ts-app .instructor-name{font-size:1.2rem;font-weight:600;margin-bottom:2px}#ts-app .instructor-title{font-size:.85rem;color:var(--text-secondary);margin-bottom:8px}#ts-app .instructor-desc{font-size:.9rem;color:var(--text-secondary);margin-bottom:12px;line-height:1.5}#ts-app .instructor-meta{display:flex;gap:16px}#ts-app .meta-item{font-size:.8rem;color:var(--text-muted);display:flex;align-items:center;gap:4px}#ts-app .meta-icon{font-size:.9rem}#ts-app .instructor-profile{display:flex;align-items:center;gap:24px;margin-bottom:48px;padding-bottom:32px;border-bottom:1px solid var(--border-color)}#ts-app .profile-avatar .avatar-letter{width:72px;height:72px;font-size:1.8rem}#ts-app .profile-name{font-size:1.5rem;font-weight:700;margin-bottom:2px}#ts-app .profile-title{font-size:.9rem;color:var(--text-secondary);margin-bottom:8px}#ts-app .profile-bio{font-size:.9rem;color:var(--text-secondary);max-width:600px}#ts-app .section-heading{font-size:1.2rem;font-weight:600;margin-bottom:20px}#ts-app .course-grid{display:grid;grid-template-columns:1fr;gap:16px}#ts-app .course-card{background:var(--bg-card);border:1px solid var(--border-color);border-radius:var(--radius-md);display:flex;overflow:hidden;transition:background .2s,border-color .2s}#ts-app .course-card:hover{background:var(--bg-card-hover);border-color:var(--accent-blue)}#ts-app .course-thumbnail{width:140px;min-height:120px;background:var(--bg-input);display:flex;align-items:center;justify-content:center;flex-shrink:0}#ts-app .thumbnail-icon{font-size:2.5rem}#ts-app .course-body{padding:20px;flex:1;display:flex;flex-direction:column}#ts-app .course-title{font-size:1.1rem;font-weight:600;margin-bottom:6px}#ts-app .course-desc{font-size:.85rem;color:var(--text-secondary);margin-bottom:12px;line-height:1.5;flex:1}#ts-app .course-meta{display:flex;align-items:center;gap:16px;flex-wrap:wrap}#ts-app .course-progress{display:flex;align-items:center;gap:8px;margin-left:auto}#ts-app .progress-bar{width:80px;height:6px;background:var(--bg-input);border-radius:3px;overflow:hidden}#ts-app .progress-fill{height:100%;background:var(--accent-green);border-radius:3px;display:block;transition:width .3s}#ts-app .progress-text{font-size:.75rem;color:var(--text-muted);white-space:nowrap}#ts-app .lesson-heading{max-width:1200px;margin:0 auto;padding:28px 24px 0}#ts-app .lesson-title{font-size:clamp(1.3rem,3.5vw,1.8rem);font-weight:700}#ts-app .player-area{max-width:1200px;margin:20px auto 0;padding:0 24px;display:flex;gap:20px}#ts-app .player-left{flex:1;min-width:0}#ts-app .video-player{width:100%;aspect-ratio:16 / 9;background:#000;border-radius:var(--radius-md);overflow:hidden}#ts-app .video-element{width:100%;height:100%;object-fit:contain}#ts-app .video-placeholder{width:100%;height:100%;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:12px;color:var(--text-muted)}#ts-app .play-icon{font-size:3rem;opacity:.5}#ts-app .player-right{width:280px;flex-shrink:0}#ts-app .lesson-list{display:flex;flex-direction:column;gap:8px;max-height:400px;overflow-y:auto}#ts-app .lesson-item{display:flex;align-items:center;gap:8px;padding:12px 16px;background:var(--bg-card);border:1px solid var(--border-color);border-radius:var(--radius-sm);font-size:.88rem;color:var(--text-primary);transition:background .2s,border-color .2s;cursor:pointer;text-align:left}#ts-app .lesson-item:hover{background:var(--bg-card-hover);border-color:var(--border-light)}#ts-app .lesson-item.is-active{background:var(--bg-card-hover);border-color:var(--accent-blue)}#ts-app .lesson-item.is-completed{opacity:.7}#ts-app .lesson-num{color:var(--text-muted);font-weight:600;flex-shrink:0}#ts-app .lesson-label{flex:1;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}#ts-app .content-area{max-width:1200px;margin:24px auto 0;padding:0 24px}#ts-app .content-left{background:var(--bg-card);border:1px solid var(--border-color);border-radius:var(--radius-md);overflow:hidden}#ts-app .content-tabs{display:flex;padding:4px 20px 0}#ts-app .tab-btn{background:none;border:none;color:var(--text-secondary);font-size:.9rem;padding:12px 20px;cursor:pointer;border-bottom:2px solid transparent;transition:color .2s,border-color .2s}#ts-app .tab-btn:hover{color:var(--text-primary)}#ts-app .tab-btn.is-active{color:var(--text-primary);border-bottom-color:var(--accent-blue)}#ts-app .tab-divider{height:1px;background:var(--border-color)}#ts-app .tab-panel{min-height:300px}#ts-app .ai-chat-body{flex:1;padding:20px;min-height:200px}#ts-app .ai-message{font-size:.9rem;color:var(--text-secondary);line-height:1.6}#ts-app .ai-chat-input{display:flex;gap:8px;padding:16px 20px;border-top:1px solid var(--border-color)}#ts-app .chat-input{flex:1;background:var(--bg-input);border:1px solid var(--border-color);border-radius:var(--radius-sm);padding:10px 14px;color:var(--text-primary);font-size:.88rem;font-family:var(--font-sans);outline:none;transition:border-color .2s}#ts-app .chat-input:focus{border-color:var(--accent-blue)}#ts-app .chat-input::placeholder{color:var(--text-muted)}#ts-app .chat-send{background:var(--accent-blue);color:#fff;border:none;border-radius:var(--radius-sm);padding:10px 20px;font-size:.88rem;font-weight:600;cursor:pointer;transition:background .2s}#ts-app .chat-send:hover{background:var(--accent-blue-hover)}#ts-app .chat-send:disabled{opacity:.5;cursor:not-allowed}#ts-app .memo-area{width:100%;min-height:300px;padding:20px;background:transparent;border:none;color:var(--text-primary);font-size:.9rem;font-family:var(--font-sans);line-height:1.7;resize:vertical;outline:none}#ts-app .memo-area::placeholder{color:var(--text-muted)}#ts-app .material-empty{padding:40px 20px;text-align:center;color:var(--text-muted);font-size:.9rem}#ts-app .material-list{padding:20px;display:flex;flex-direction:column;gap:8px}#ts-app .material-item{padding:10px 14px;background:var(--bg-input);border-radius:var(--radius-sm);font-size:.88rem;transition:background .2s}#ts-app .material-item:hover{background:var(--bg-card-hover)}#ts-app .curriculum-section{max-width:1200px;margin:48px auto 0;padding:0 24px}#ts-app .curriculum-heading{font-size:1.3rem;font-weight:700;margin-bottom:12px}#ts-app .curriculum-divider{height:2px;background:var(--text-primary);margin-bottom:24px}#ts-app .curriculum-list{display:flex;flex-direction:column;gap:12px}#ts-app .curriculum-item{font-size:.95rem;color:var(--text-primary);display:flex;align-items:baseline;gap:4px;padding:4px 0;background:none;border:none;cursor:pointer;text-align:left;transition:color .2s}#ts-app .curriculum-item:hover{color:var(--accent-blue)}#ts-app .curriculum-item.is-current{color:var(--accent-blue);font-weight:600}#ts-app .curriculum-num{font-weight:600;flex-shrink:0}#ts-app .admin-header{display:flex;align-items:center;justify-content:space-between;margin-bottom:28px}#ts-app .admin-back-link{font-size:.85rem;color:var(--text-secondary);transition:color .2s}#ts-app .admin-back-link:hover{color:var(--accent-blue)}#ts-app .admin-btn{padding:10px 18px;border:none;border-radius:var(--radius-sm);font-size:.85rem;font-weight:600;cursor:pointer;transition:background .2s,opacity .2s}#ts-app .admin-btn:disabled{opacity:.5;cursor:not-allowed}#ts-app .admin-btn-sm{padding:6px 12px;font-size:.8rem}#ts-app .admin-btn-primary{background:var(--accent-blue);color:#fff}#ts-app .admin-btn-primary:hover{background:var(--accent-blue-hover)}#ts-app .admin-btn-secondary{background:var(--bg-input);color:var(--text-primary)}#ts-app .admin-btn-secondary:hover{background:var(--bg-card-hover)}#ts-app .admin-btn-danger{background:transparent;color:var(--accent-red);border:1px solid var(--accent-red-border)}#ts-app .admin-btn-danger:hover{background:var(--accent-red-bg)}#ts-app .admin-input{flex:1;background:var(--bg-input);border:1px solid var(--border-color);border-radius:var(--radius-sm);padding:10px 14px;color:var(--text-primary);font-size:.88rem;font-family:var(--font-sans);outline:none;transition:border-color .2s}#ts-app .admin-input:focus{border-color:var(--accent-blue)}#ts-app .admin-input::placeholder{color:var(--text-muted)}#ts-app .admin-input-short{max-width:120px;flex:none}#ts-app .admin-textarea{width:100%;background:var(--bg-input);border:1px solid var(--border-color);border-radius:var(--radius-sm);padding:10px 14px;color:var(--text-primary);font-size:.88rem;font-family:var(--font-sans);line-height:1.6;resize:vertical;outline:none;transition:border-color .2s}#ts-app .admin-textarea:focus{border-color:var(--accent-blue)}#ts-app .admin-textarea::placeholder{color:var(--text-muted)}#ts-app .admin-textarea-tall{min-height:200px}#ts-app .admin-file-input{font-size:.85rem;color:var(--text-secondary)}#ts-app .admin-file-input::file-selector-button{background:var(--bg-input);color:var(--text-primary);border:1px solid var(--border-color);border-radius:var(--radius-sm);padding:6px 14px;margin-right:12px;cursor:pointer;font-family:var(--font-sans)}#ts-app .admin-create-bar{display:flex;gap:12px;margin-bottom:28px}#ts-app .admin-table{display:flex;flex-direction:column;gap:8px}#ts-app .admin-empty{text-align:center;padding:40px;color:var(--text-muted)}#ts-app .admin-row{background:var(--bg-card);border:1px solid var(--border-color);border-radius:var(--radius-md);padding:16px 20px;display:flex;align-items:center;justify-content:space-between;gap:16px}#ts-app .admin-row-title{font-size:1rem;font-weight:600;transition:color .2s}#ts-app .admin-row-title:hover{color:var(--accent-blue)}#ts-app .admin-row-meta{display:flex;align-items:center;gap:12px;margin-top:4px}#ts-app .admin-badge{font-size:.75rem;padding:2px 8px;border-radius:10px;font-weight:600}#ts-app .badge-published{background:#4ecb7126;color:var(--accent-green)}#ts-app .badge-draft{background:#a0a0b826;color:var(--text-secondary)}#ts-app .admin-row-count{font-size:.8rem;color:var(--text-muted)}#ts-app .admin-row-actions{display:flex;gap:8px;flex-shrink:0}#ts-app .editor-section{background:var(--bg-card);border:1px solid var(--border-color);border-radius:var(--radius-md);padding:24px;margin-bottom:24px}#ts-app .editor-heading{font-size:1.1rem;font-weight:600;margin-bottom:20px;padding-bottom:12px;border-bottom:1px solid var(--border-color)}#ts-app .editor-field{margin-bottom:16px}#ts-app .editor-label{display:block;font-size:.82rem;color:var(--text-secondary);margin-bottom:6px;font-weight:600}#ts-app .editor-hint{font-size:.8rem;color:var(--accent-green);margin-top:4px}#ts-app .editor-field-actions{display:flex;gap:8px;margin-top:16px}#ts-app .editor-section-block{border:1px solid var(--border-color);border-radius:var(--radius-sm);margin-bottom:16px;overflow:hidden}#ts-app .editor-section-header{background:var(--bg-input);padding:12px 16px;display:flex;align-items:center;justify-content:space-between;gap:12px}#ts-app .editor-section-title{font-size:.95rem;font-weight:600;cursor:pointer}#ts-app .editor-section-title:hover{color:var(--accent-blue)}#ts-app .editor-section-actions{display:flex;gap:6px;flex-shrink:0}#ts-app .editor-lesson-list{padding:8px}#ts-app .editor-lesson-row{border:1px solid transparent;border-radius:var(--radius-sm);margin-bottom:4px}#ts-app .editor-lesson-row.is-editing{border-color:var(--accent-blue);background:#4a9eff0d}#ts-app .editor-lesson-header{display:flex;align-items:center;gap:8px;padding:10px 12px;cursor:pointer;transition:background .15s;border-radius:var(--radius-sm)}#ts-app .editor-lesson-header:hover{background:var(--bg-card-hover)}#ts-app .editor-lesson-num{color:var(--text-muted);font-weight:600;flex-shrink:0;width:24px}#ts-app .editor-lesson-name{flex:1;font-size:.88rem}#ts-app .editor-lesson-indicators{display:flex;gap:4px;flex-shrink:0}#ts-app .indicator-ok{font-size:.85rem}#ts-app .indicator-missing{font-size:.85rem;opacity:.5}#ts-app .editor-lesson-detail{padding:16px 12px;border-top:1px solid var(--border-color)}#ts-app .editor-empty{text-align:center;padding:16px;color:var(--text-muted);font-size:.85rem}#ts-app .editor-add-section{display:flex;gap:12px;margin-top:16px}@media(max-width:768px){#ts-app .header-inner{padding:0 16px}#ts-app .ts-main{padding:24px 16px}#ts-app .instructor-grid{grid-template-columns:1fr}#ts-app .instructor-card{padding:20px}#ts-app .instructor-profile{flex-direction:column;align-items:flex-start;gap:16px}#ts-app .course-card{flex-direction:column}#ts-app .course-thumbnail{width:100%;min-height:80px}#ts-app .player-area{flex-direction:column;padding:0 16px}#ts-app .player-right{width:100%}#ts-app .lesson-list{flex-direction:row;overflow-x:auto;max-height:none;gap:8px;padding-bottom:4px}#ts-app .lesson-item{white-space:nowrap;flex-shrink:0}#ts-app .content-area{padding:0 16px}#ts-app .lesson-heading{padding:20px 16px 0}#ts-app .curriculum-section{padding:0 16px}#ts-app .admin-row{flex-direction:column;align-items:flex-start}#ts-app .admin-row-actions{width:100%;flex-wrap:wrap}#ts-app .admin-create-bar{flex-direction:column}#ts-app .editor-section-header{flex-direction:column;align-items:flex-start;gap:8px}#ts-app .editor-add-section{flex-direction:column}}@media(max-width:500px){#ts-app .tab-btn{padding:10px 14px;font-size:.82rem}}