@import"https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600&display=swap";:root{--bg-primary: #1e1e1e;--bg-secondary: #252526;--bg-tertiary: #2d2d30;--bg-hover: #2a2d2e;--bg-active: #37373d;--bg-selection: #264f78;--text-primary: #cccccc;--text-secondary: #a0a0a0;--text-muted: #888888;--accent-blue: #4ec9b0;--accent-cyan: #4ec9b0;--accent-green: #6a9955;--accent-yellow: #dcdcaa;--accent-orange: #ce9178;--accent-red: #f48771;--accent-purple: #c586c0;--border-color: #3e3e3e;--border-hover: #4a4a4a;--code-font: "JetBrains Mono", "Fira Code", "Consolas", "Courier New", monospace;--shadow-sm: 0 2px 4px rgba(0, 0, 0, .3);--shadow-md: 0 4px 8px rgba(0, 0, 0, .4);--shadow-lg: 0 8px 16px rgba(0, 0, 0, .5)}body{font-family:var(--code-font);background:var(--bg-primary);color:var(--text-primary);min-height:100vh;overflow-x:hidden;font-size:14px;line-height:1.6}.top-navbar{position:fixed;top:0;left:0;right:0;height:60px;background:var(--bg-secondary);border-bottom:1px solid var(--border-color);z-index:1000;display:flex;align-items:center}.nav-container{width:100%;max-width:100%;margin:0 auto;padding:0 20px;display:flex;justify-content:space-between;align-items:center}.nav-brand .nav-title{font-family:var(--code-font);font-size:18px;font-weight:600;color:var(--accent-cyan);margin:0}.nav-menu{display:flex;gap:10px;align-items:center}.nav-link{color:var(--text-secondary);text-decoration:none;padding:8px 16px;border-radius:4px;transition:all .2s;font-family:var(--code-font);font-size:14px}.nav-link:hover{background:var(--bg-hover);color:var(--text-primary)}.admin-container{display:flex;min-height:calc(100vh - 60px)}.admin-sidebar{width:250px;background:var(--bg-secondary);border-right:1px solid var(--border-color);padding:20px 0;position:fixed;height:calc(100vh - 60px);overflow-y:auto}.admin-sidebar-header{padding:0 20px 20px;border-bottom:1px solid var(--border-color);margin-bottom:20px}.admin-sidebar-header h2{font-size:18px;color:var(--text-primary);margin:0}.admin-nav{display:flex;flex-direction:column;gap:5px;padding:0 10px}.admin-nav-btn{padding:12px 16px;background:transparent;border:none;color:var(--text-secondary);text-align:left;cursor:pointer;border-radius:4px;font-size:14px;transition:all .2s;font-family:var(--code-font)}.admin-nav-btn:hover{background:var(--bg-hover);color:var(--text-primary)}.admin-nav-btn.active{background:var(--bg-active);color:var(--accent-cyan);font-weight:600}.sidebar-search{padding:0 10px 15px;border-bottom:1px solid var(--border-color);margin-bottom:15px}.sidebar-search-input{width:100%;padding:8px 12px;background:var(--bg-tertiary);border:1px solid var(--border-color);border-radius:4px;color:var(--text-primary);font-size:13px;font-family:var(--code-font);transition:all .2s}.sidebar-search-input:focus{outline:none;border-color:var(--accent-blue);box-shadow:0 0 0 2px #4ec9b033}.sidebar-search-input::placeholder{color:var(--text-muted)}.sidebar-skills-list{margin-bottom:15px}.sidebar-skill-item{margin-bottom:5px}.sidebar-skill-header{display:flex;align-items:center;gap:8px;padding:8px 12px;cursor:pointer;border-radius:4px;transition:all .2s;-webkit-user-select:none;user-select:none}.sidebar-skill-header:hover{background:var(--bg-hover)}.sidebar-skill-item.active>.sidebar-skill-header{background:var(--bg-active);color:var(--accent-cyan)}.sidebar-skill-toggle{font-size:10px;color:var(--text-muted);width:12px;text-align:center}.sidebar-skill-icon{font-size:16px}.sidebar-skill-name{flex:1;font-size:13px;color:var(--text-secondary)}.sidebar-skill-item.active>.sidebar-skill-header .sidebar-skill-name{color:var(--accent-cyan);font-weight:500}.sidebar-skill-children{padding-left:20px;margin-top:5px}.sidebar-nav-item{display:block;width:100%;padding:8px 12px 8px 32px;background:transparent;border:none;color:var(--text-secondary);text-align:left;cursor:pointer;border-radius:4px;font-size:13px;transition:all .2s;font-family:var(--code-font)}.sidebar-nav-item:hover{background:var(--bg-hover);color:var(--text-primary)}.sidebar-nav-item.active{background:var(--bg-active);color:var(--accent-cyan);font-weight:500}.admin-main{flex:1;margin-left:250px;padding:30px;max-width:calc(100% - 250px)}.admin-section{animation:fadeIn .3s}@keyframes fadeIn{0%{opacity:0;transform:translateY(10px)}to{opacity:1;transform:translateY(0)}}.breadcrumb{margin-bottom:24px;padding-bottom:16px;border-bottom:1px solid var(--border-color)}.breadcrumb-list{display:flex;align-items:center;gap:0;list-style:none;padding:0;margin:0;flex-wrap:wrap;font-size:14px;font-family:var(--code-font)}.breadcrumb-item{display:flex;align-items:center;gap:0}.breadcrumb-separator{color:var(--text-muted);margin:0 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.2s}.btn-primary:hover{background:var(--accent-cyan);transform:translateY(-1px);box-shadow:var(--shadow-md)}.btn-secondary{background:var(--bg-tertiary);color:var(--text-primary);border:1px solid var(--border-color);padding:10px 20px;border-radius:4px;cursor:pointer;font-size:14px;font-family:var(--code-font);transition:all .2s}.btn-secondary:hover{background:var(--bg-hover);border-color:var(--border-hover)}.btn-danger{background:var(--accent-red);color:#fff;border:none;padding:8px 16px;border-radius:4px;cursor:pointer;font-size:12px;font-family:var(--code-font)}.btn-danger:hover{background:#e06b5a}.search-container{margin-bottom:20px}.search-input{width:100%;max-width:500px;padding:12px 16px;background:var(--bg-secondary);border:1px solid var(--border-color);border-radius:4px;color:var(--text-primary);font-size:14px;font-family:var(--code-font);transition:all .2s}.search-input:focus{outline:none;border-color:var(--accent-blue);box-shadow:0 0 0 2px 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solid var(--border-color)}.exercises-container{display:flex;flex-direction:column;gap:12px}.week-list-item{background:var(--bg-secondary);border:1px solid var(--border-color);border-radius:6px;transition:all .2s;cursor:pointer}.week-list-item:hover{border-color:var(--accent-blue);box-shadow:var(--shadow-sm)}.week-list-item.expanded{border-color:var(--accent-cyan);box-shadow:var(--shadow-md)}.week-list-item.current-week{border-color:var(--accent-blue);background:var(--bg-tertiary);box-shadow:0 0 0 2px #4ec9b033}.week-list-item-header{display:flex;align-items:center;padding:16px 20px;gap:12px}.week-drag-handle{cursor:grab;color:var(--text-muted);font-size:18px;padding:4px;display:flex;align-items:center;transition:color .2s}.week-drag-handle:hover{color:var(--accent-cyan);cursor:grabbing}.week-drag-handle:active{cursor:grabbing}.week-order-controls{display:flex;flex-direction:column;gap:4px}.week-order-btn{background:transparent;border:1px solid var(--border-color);color:var(--text-secondary);width:24px;height:20px;padding:0;cursor:pointer;border-radius:3px;display:flex;align-items:center;justify-content:center;font-size:12px;transition:all .2s}.week-order-btn:hover{background:var(--bg-hover);border-color:var(--accent-blue);color:var(--text-primary)}.week-order-btn:disabled{opacity:.3;cursor:not-allowed}.week-expand-icon{color:var(--text-muted);font-size:14px;transition:transform .2s;min-width:20px}.week-list-item.expanded .week-expand-icon{transform:rotate(90deg)}.week-list-item-content{flex:1;min-width:0}.week-list-item-title{font-size:16px;font-weight:600;color:var(--text-primary);margin:0 0 4px;display:flex;align-items:center;gap:8px}.week-list-item-meta{font-size:12px;color:var(--text-muted);font-family:var(--code-font);display:flex;gap:12px;flex-wrap:wrap}.week-badge{display:inline-flex;align-items:center;gap:4px;padding:2px 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#4ec9b033}.exercise-item-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:12px}.exercise-item-title{font-size:14px;font-weight:600;color:var(--accent-cyan)}.exercise-item-actions{display:flex;gap:6px}.exercise-item-actions button{padding:4px 10px;font-size:11px}.exercise-problems{display:flex;flex-direction:column;gap:8px;margin-top:12px}.problem-item{background:var(--bg-primary);border:1px solid var(--border-color);border-radius:4px;padding:10px 12px;display:flex;justify-content:space-between;align-items:center}.problem-item.current-problem{border-color:var(--accent-blue);background:var(--bg-secondary);box-shadow:0 0 0 2px #4ec9b033}.problem-item-info{flex:1;min-width:0}.problem-id{font-size:11px;color:var(--text-muted);font-family:var(--code-font);background:var(--bg-secondary);padding:2px 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var(--border-color);display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:15px}.pagination-info{color:var(--text-secondary);font-size:14px}.pagination-controls{display:flex;align-items:center;gap:15px}.pagination-page-info{color:var(--text-primary);font-size:14px;min-width:100px;text-align:center}.pagination-controls button:disabled{opacity:.5;cursor:not-allowed}.pagination-controls button:disabled:hover{background:var(--bg-tertiary);transform:none}.form-group{margin-bottom:20px}.form-group label{display:block;margin-bottom:8px;color:var(--text-primary);font-size:14px;font-weight:500}.form-input{width:100%;padding:10px;background:var(--bg-secondary);border:1px solid var(--border-color);border-radius:4px;color:var(--text-primary);font-size:14px;font-family:var(--code-font);transition:all .2s}.form-input:focus{outline:none;border-color:var(--accent-blue);box-shadow:0 0 0 2px #4ec9b033}.form-textarea{width:100%;padding:10px;background:var(--bg-secondary);border:1px solid var(--border-color);border-radius:4px;color:var(--text-primary);font-size:14px;font-family:var(--code-font);resize:vertical;min-height:100px}.code-textarea{font-family:Courier New,monospace;font-size:13px;line-height:1.6}.form-actions{display:flex;gap:10px;justify-content:flex-end;margin-top:25px;padding-top:20px;border-top:1px solid var(--border-color)}.select-input{padding:10px;background:var(--bg-secondary);border:1px solid var(--border-color);border-radius:4px;color:var(--text-primary);font-size:14px;font-family:var(--code-font);cursor:pointer}.modal{display:none;position:fixed;z-index:2000;left:0;top:0;width:100%;height:100%;background-color:#000000b3;-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px)}.modal-content{background:var(--bg-secondary);margin:5% auto;padding:30px;border:1px solid var(--border-color);border-radius:8px;width:90%;max-width:600px;max-height:80vh;overflow-y:auto;position:relative;box-shadow:var(--shadow-lg)}.modal-large{max-width:900px}.close-modal{position:absolute;right:20px;top:20px;font-size:28px;font-weight:700;color:var(--text-secondary);cursor:pointer;transition:color .2s}.close-modal:hover{color:var(--text-primary)}.modal-content h2{margin:0 0 25px;color:var(--text-primary);font-size:24px}.config-editor{margin-top:20px;display:flex;flex-direction:column;gap:30px}.config-editor h2{margin-bottom:15px;color:var(--text-primary)}.section-header-inline{display:flex;justify-content:space-between;align-items:center;margin-bottom:20px}.section-header-inline h2{margin:0}.theme-editor-section{background:var(--bg-secondary);border:1px solid var(--border-color);border-radius:6px;padding:20px}.themes-list{display:flex;flex-direction:column;gap:20px}.theme-editor-item{background:var(--bg-tertiary);border:1px solid var(--border-color);border-radius:6px;padding:20px;transition:border-color .2s}.theme-editor-item:hover{border-color:var(--border-hover)}.theme-editor-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:20px;padding-bottom:15px;border-bottom:1px solid var(--border-color)}.theme-editor-header h3{margin:0;color:var(--accent-cyan);font-size:20px}.theme-editor-content{display:flex;flex-direction:column;gap:20px}.colors-section{margin-top:10px}.colors-section>h4{margin-bottom:15px;color:var(--text-primary);font-size:16px}.color-group{margin-bottom:25px;padding:15px;background:var(--bg-primary);border-radius:4px;border:1px solid var(--border-color)}.color-group h4{margin:0 0 15px;color:var(--accent-yellow);font-size:14px;text-transform:uppercase;letter-spacing:1px}.color-inputs-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(250px,1fr));gap:15px}.color-input-group{display:flex;flex-direction:column;gap:5px}.color-input-group label{font-size:12px;color:var(--text-secondary);font-weight:500;text-transform:capitalize}.color-input-wrapper{display:flex;gap:8px;align-items:center}.color-picker{width:50px;height:40px;border:1px solid var(--border-color);border-radius:4px;cursor:pointer;background:transparent;padding:2px}.color-picker::-webkit-color-swatch-wrapper{padding:0}.color-picker::-webkit-color-swatch{border:1px solid var(--border-color);border-radius:3px}.color-text-input{flex:1;min-width:0}.theme-actions{margin-top:10px;padding-top:15px;border-top:1px solid var(--border-color)}.empty-message{color:var(--text-muted);font-style:italic;text-align:center;padding:40px 20px}.config-json-section{background:var(--bg-secondary);border:1px solid var(--border-color);border-radius:6px;padding:20px}.code-editor{width:100%;min-height:500px;padding:15px;background:var(--bg-primary);border:1px solid var(--border-color);border-radius:4px;color:var(--text-primary);font-family:Courier New,monospace;font-size:13px;line-height:1.6;resize:vertical}.editor-actions{display:flex;gap:10px;margin-top:15px}.status-message{padding:12px 16px;border-radius:4px;margin-bottom:20px;font-size:14px}.status-success{background:#6a995533;border:1px solid var(--accent-green);color:var(--accent-green)}.status-error{background:#f4877133;border:1px solid var(--accent-red);color:var(--accent-red)}.status-info{background:#4ec9b033;border:1px solid var(--accent-cyan);color:var(--accent-cyan)}.loading-spinner{width:50px;height:50px;margin:0 auto;border:4px solid var(--border-color);border-top:4px solid var(--accent-cyan);border-radius:50%;animation:spin 1s linear infinite}@keyframes spin{0%{transform:rotate(0)}to{transform:rotate(360deg)}}.exercises-list{display:grid;grid-template-columns:repeat(auto-fill,minmax(350px,1fr));gap:20px}.exercise-card{background:var(--bg-secondary);border:1px solid var(--border-color);border-radius:8px;padding:20px;transition:all .2s}.exercise-card:hover{border-color:var(--accent-blue);box-shadow:var(--shadow-md);transform:translateY(-2px)}.exercise-card-header{display:flex;justify-content:space-between;align-items:flex-start;margin-bottom:12px}.exercise-card-title{font-size:18px;color:var(--text-primary);margin:0;flex:1}.exercise-card-week{font-size:12px;color:var(--text-muted);background:var(--bg-tertiary);padding:4px 8px;border-radius:4px}.exercise-card-question{color:var(--text-secondary);margin:12px 0;line-height:1.6}.exercise-card-meta{display:flex;gap:15px;font-size:12px;color:var(--text-muted);margin-top:12px;padding-top:12px;border-top:1px solid var(--border-color)}.phases-list{display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:20px}.phase-card{background:var(--bg-secondary);border:1px solid var(--border-color);border-radius:8px;padding:20px;transition:all .2s}.phase-card:hover{border-color:var(--accent-blue);box-shadow:var(--shadow-md);transform:translateY(-2px)}.phase-card-header{display:flex;justify-content:space-between;align-items:center}.phase-card-title{font-size:20px;color:var(--text-primary);margin:0}.phase-card-count{font-size:14px;color:var(--text-muted);background:var(--bg-tertiary);padding:4px 12px;border-radius:12px}.problems-list{display:grid;grid-template-columns:repeat(auto-fill,minmax(350px,1fr));gap:20px}.problem-card{background:var(--bg-secondary);border:1px solid var(--border-color);border-radius:8px;padding:20px;transition:all .2s}.problem-card:hover{border-color:var(--accent-blue);box-shadow:var(--shadow-md);transform:translateY(-2px)}.problem-card-header{display:flex;justify-content:space-between;align-items:flex-start;margin-bottom:12px}.problem-card-id{font-size:16px;color:var(--text-primary);margin:0;font-weight:600}.problem-card-exercise{font-size:12px;color:var(--text-muted);background:var(--bg-tertiary);padding:4px 8px;border-radius:4px}.problem-card-question{color:var(--text-secondary);margin:12px 0;line-height:1.6}.problem-card-meta{display:flex;gap:15px;font-size:12px;color:var(--text-muted);margin-top:12px;padding-top:12px;border-top:1px solid var(--border-color)}.problem-detail{max-width:900px}.problem-detail-card{background:var(--bg-secondary);border:1px solid var(--border-color);border-radius:8px;padding:30px}.problem-detail-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:30px;padding-bottom:20px;border-bottom:2px solid 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