#section-analytics{display:none;padding:2rem;overflow-y:auto;background:var(--bg-primary)}#section-analytics.active-section{display:flex;flex-direction:column;flex:1}.analytics-header{text-align:center;margin-bottom:2rem}.analytics-header h2{font-size:1.5rem;font-weight:600;color:var(--text-primary);margin-bottom:0.5rem}.analytics-header p{color:var(--text-muted);font-size:0.9rem}.analytics-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(400px,1fr));gap:1.5rem;max-width:1200px;margin:0 auto}.analytics-card{background:var(--bg-secondary);border:1px solid var(--border-color);border-radius:12px;padding:1.5rem;transition:all var(--transition)}.analytics-card:hover{border-color:var(--text-muted)}.analytics-card h3{font-size:1rem;font-weight:600;color:var(--text-primary);margin-bottom:0.5rem}.card-description{font-size:0.8rem;color:var(--text-muted);margin-bottom:1rem}.complexity-card{grid-column:span 1}.complexity-chart{background:var(--bg-tertiary);border-radius:8px;padding:1rem;margin-bottom:1rem;height:250px;min-height:250px;position:relative}.complexity-chart canvas{width:100% !important;height:100% !important}.complexity-legend{display:flex;flex-wrap:wrap;gap:1rem;font-size:0.75rem}.legend-item{display:flex;align-items:center;gap:0.4rem;color:var(--text-secondary)}.legend-color{width:12px;height:12px;border-radius:2px}.benchmark-chart-card{grid-column:span 1}.benchmark-chart{height:200px;background:var(--bg-tertiary);border-radius:8px;padding:16px;margin-bottom:0.5rem}.benchmark-chart canvas{width:100% !important;height:100% !important}.chart-note{text-align:center;font-size:0.75rem;color:var(--text-muted)}.info-card{grid-column:span 1}.algo-selector{display:flex;align-items:center;gap:1rem;margin-bottom:1rem}.algo-selector label{font-size:0.8rem;color:var(--text-muted)}.algo-info-content{background:var(--bg-tertiary);border-radius:8px;padding:1.25rem}.algo-info-content .info-row{display:flex;justify-content:space-between;padding:0.5rem 0;border-bottom:1px solid var(--border-color)}.algo-info-content .info-row:last-child{border-bottom:none}.algo-info-content .info-label{color:var(--text-muted);font-size:0.8rem}.algo-info-content .info-value{color:var(--text-primary);font-weight:500;font-size:0.85rem;font-family:'SF Mono','Consolas',monospace}.algo-info-content .algo-description{margin-top:1rem;padding-top:1rem;border-top:1px solid var(--border-color);font-size:0.85rem;color:var(--text-secondary);line-height:1.5}.stats-card{grid-column:span 1}.session-stats{display:grid;grid-template-columns:repeat(2,1fr);gap:1rem;margin-bottom:1.5rem}.stat-item{background:var(--bg-tertiary);padding:1rem;border-radius:8px;text-align:center}.stat-label{display:block;font-size:0.7rem;text-transform:uppercase;letter-spacing:0.08em;color:var(--text-muted);margin-bottom:0.4rem}.stat-value{display:block;font-size:1.25rem;font-weight:600;color:var(--text-primary);font-family:'SF Mono','Consolas',monospace}.export-card{grid-column:span 1}.export-options{display:flex;gap:1rem;margin-bottom:1rem}.export-options .btn{flex:1}.export-note{text-align:center;color:var(--text-muted)}.export-note small{font-size:0.75rem}.complexity-chart,.benchmark-chart{width:100%;min-height:200px;aspect-ratio:16 / 9}.usage-chart-card{grid-column:span 1}.usage-chart{background:var(--bg-tertiary);border-radius:8px;padding:1rem;height:200px;min-height:200px;position:relative}.usage-chart canvas{width:100% !important;height:100% !important}.trend-chart-card{grid-column:span 1}.trend-chart{background:var(--bg-tertiary);border-radius:8px;padding:1rem;height:200px;min-height:200px;position:relative}.trend-chart canvas{width:100% !important;height:100% !important}.analytics-timeline-wrap{max-height:320px;overflow-y:auto;padding-right:0.5rem}.analytics-timeline-wrap::-webkit-scrollbar{width:4px}.analytics-timeline-wrap::-webkit-scrollbar-track{background:transparent}.analytics-timeline-wrap::-webkit-scrollbar-thumb{background:var(--border-color);border-radius:2px}.timeline-entry{display:flex;gap:0.75rem;padding:0.6rem 0;border-bottom:1px solid var(--border-color);transition:background 0.15s ease}.timeline-entry:last-child{border-bottom:none}.timeline-entry:hover{background:var(--bg-tertiary);border-radius:6px;padding-left:0.5rem;margin-left:-0.5rem}.timeline-dot{width:8px;height:8px;min-width:8px;background:var(--primary-color,#4a90d9);border-radius:50%;margin-top:0.4rem}.timeline-content{flex:1;min-width:0}.timeline-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:0.25rem}.timeline-algo{font-weight:600;font-size:0.85rem;color:var(--text-primary)}.timeline-time{font-size:0.7rem;color:var(--text-muted);flex-shrink:0}.timeline-stats{display:flex;gap:0.75rem;flex-wrap:wrap}.timeline-stats span{font-size:0.73rem;color:var(--text-secondary);font-family:'SF Mono','Consolas',monospace}.timeline-empty{text-align:center;padding:2rem 1rem;color:var(--text-muted);font-size:0.85rem}.bests-card{grid-column:span 1}.bests-grid{display:grid;grid-template-columns:1fr 1fr;gap:0.75rem}.best-card{background:var(--bg-tertiary);padding:0.75rem;border-radius:8px;border:1px solid var(--border-color);transition:border-color 0.2s ease}.best-card:hover{border-color:var(--primary-color,#4a90d9)}.best-algo{font-weight:600;font-size:0.8rem;color:var(--text-primary);margin-bottom:0.25rem}.best-metric{font-size:1.1rem;font-weight:700;color:#2ecc71;font-family:'SF Mono','Consolas',monospace}.best-details{font-size:0.7rem;color:var(--text-secondary);margin-top:0.25rem}.best-when{font-size:0.65rem;color:var(--text-muted);margin-top:0.15rem}.bests-empty{text-align:center;padding:1.5rem;color:var(--text-muted);font-size:0.85rem}.recommendation-card{grid-column:span 1}.rec-card{background:var(--bg-tertiary);border-radius:8px;padding:1.25rem;border:1px solid var(--border-color)}.rec-header{display:flex;align-items:center;gap:0.75rem;margin-bottom:0.75rem}.rec-badge{background:rgba(46,204,113,0.15);color:#2ecc71;padding:0.2rem 0.6rem;border-radius:20px;font-size:0.7rem;font-weight:600;text-transform:uppercase;letter-spacing:0.5px;border:1px solid rgba(46,204,113,0.3)}.rec-algo{font-weight:700;font-size:1.1rem;color:var(--text-primary)}.rec-reason{font-size:0.82rem;color:var(--text-secondary);line-height:1.5;margin-bottom:0.75rem}.rec-alts-label{font-size:0.7rem;text-transform:uppercase;letter-spacing:0.5px;color:var(--text-muted);margin-bottom:0.5rem}.rec-alts{display:flex;flex-direction:column;gap:0.4rem}.rec-alt{display:flex;gap:0.5rem;align-items:baseline;font-size:0.78rem}.rec-alt-name{font-weight:600;color:var(--text-primary);white-space:nowrap}.rec-alt-reason{color:var(--text-muted)}.rec-empty{text-align:center;padding:1.5rem;color:var(--text-muted);font-size:0.85rem}.toast-actions{display:flex;gap:0.5rem;margin-top:0.5rem}.toast-action-btn{background:rgba(255,255,255,0.1);border:1px solid rgba(255,255,255,0.2);color:inherit;padding:0.25rem 0.6rem;border-radius:4px;font-size:0.75rem;cursor:pointer;transition:background 0.15s ease}.toast-action-btn:hover{background:rgba(255,255,255,0.2)}.toast-action-primary{background:var(--primary-color,#4a90d9);border-color:transparent;color:#fff}.toast-action-primary:hover{filter:brightness(1.15)}.toast-count{display:inline-flex;align-items:center;justify-content:center;background:rgba(255,255,255,0.15);color:inherit;font-size:0.65rem;font-weight:700;padding:0.1rem 0.4rem;border-radius:10px;margin-left:0.25rem}.toast-pin{position:absolute;top:0.35rem;left:0.35rem;font-size:0.6rem;opacity:0.5}@media (max-width:768px) and (orientation:portrait),(max-width:480px){#section-analytics{padding:0.75rem !important;padding-bottom:80px !important}#section-analytics.active-section{overflow-y:auto !important;-webkit-overflow-scrolling:touch}.analytics-header{margin-bottom:1rem}.analytics-header h2{font-size:1.1rem}.analytics-header p{font-size:0.75rem}.analytics-grid{grid-template-columns:1fr !important;gap:1rem}.analytics-card{grid-column:1 / -1 !important;padding:1rem}.analytics-card h3{font-size:0.9rem}.card-description{font-size:0.75rem;margin-bottom:0.75rem}.complexity-chart,.benchmark-chart,.usage-chart,.trend-chart{height:180px !important;min-height:0 !important;aspect-ratio:auto !important;width:100%}.complexity-legend{gap:0.5rem;font-size:0.65rem}.session-stats{grid-template-columns:1fr 1fr;gap:0.5rem}.stat-item{padding:0.75rem 0.5rem}.stat-value{font-size:1rem}.stat-label{font-size:0.6rem}.export-options{flex-direction:column;gap:0.5rem}.analytics-timeline-wrap{max-height:250px}.timeline-header{flex-direction:column;align-items:flex-start;gap:0.15rem}.timeline-stats{gap:0.5rem}.bests-grid{grid-template-columns:1fr !important}.algo-selector{flex-direction:column;align-items:stretch;gap:0.5rem}.algo-info-content .info-row{flex-direction:column;gap:0.15rem;padding:0.4rem 0}.upload-area{padding:1rem !important}.insights-container{gap:1rem !important}#insights-advanced-settings summary{font-size:0.8rem !important}}#section-step{display:none;padding:1.5rem;overflow-y:auto}#section-step.active-section{display:flex;flex-direction:column;flex:1}.step-header{text-align:center;margin-bottom:1rem}.step-header h2{font-size:1.5rem;margin-bottom:0.25rem}.step-header p{color:var(--text-secondary);font-size:0.875rem}.step-controls{background:var(--bg-secondary);padding:1.5rem;border-radius:12px;margin-bottom:1.5rem;display:flex;flex-wrap:wrap;gap:1.5rem;align-items:center;justify-content:space-between}.step-config{display:flex;gap:1.5rem;flex-wrap:wrap}.step-actions{display:flex;gap:0.5rem;flex-wrap:wrap}.step-info{background:var(--bg-tertiary);padding:1rem 1.5rem;border-radius:8px;margin-bottom:1.5rem;display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:1rem}.step-counter{font-size:1.25rem;font-weight:600}.step-description{flex:1;text-align:center;color:var(--text-secondary);font-style:italic}.step-stats{display:flex;gap:1.5rem}.step-split-container{display:flex;flex-wrap:nowrap;gap:1.5rem;margin-bottom:1rem;align-items:stretch;flex:1 1 0;min-height:0}#section-step{--step-code-width:320px}.step-vis-pane{flex:1 1 0;min-width:0;display:flex;flex-direction:column;min-height:0}.step-code-pane{flex:0 0 var(--step-code-width);width:var(--step-code-width);min-width:260px;max-width:min(60vw,760px);display:flex;flex-direction:column;background:var(--bg-secondary);border:1px solid var(--border-color);border-radius:12px;overflow:hidden;min-height:0}.step-code-resizer{width:12px;cursor:col-resize;border-radius:999px;align-self:stretch;background:var(--border-color);transition:background 0.2s ease,transform 0.2s ease;flex:0 0 auto;position:relative}.step-code-resizer::after{content:'';position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);width:2px;height:24px;background:var(--text-muted);border-radius:2px;opacity:0.5;transition:opacity 0.2s ease,background 0.2s ease}.step-code-resizer:hover,.step-code-resizer:focus-visible{background:var(--bar-compare)}.step-code-resizer:hover::after,.step-code-resizer:focus-visible::after{background:var(--bg-primary);opacity:1}.pseudocode-header{display:flex;justify-content:space-between;align-items:center;padding:0.75rem 1rem;background:var(--bg-tertiary);border-bottom:1px solid var(--border-color)}.pseudocode-title{font-weight:600;font-size:0.85rem;color:var(--text-primary);text-transform:uppercase;letter-spacing:0.05em}.pseudocode-complexity{font-family:'SF Mono','Consolas',monospace;font-size:0.8rem;color:var(--bar-compare);background:rgba(245,200,66,0.1);padding:0.25rem 0.5rem;border-radius:4px}.pseudocode-container{flex:1;padding:1rem 0;overflow-y:auto;font-family:'SF Mono','Consolas','Monaco',monospace;font-size:0.8rem;line-height:1.8}.pseudocode-line{display:flex;padding:0.15rem 1rem;transition:background 0.2s,border-color 0.2s;border-left:3px solid transparent}.pseudocode-line.active{background:rgba(245,200,66,0.15);border-left-color:var(--bar-compare)}.pseudocode-line.executed{opacity:0.6}.pseudocode-line.active.executed{opacity:1}.line-number{width:28px;color:var(--text-muted);user-select:none;text-align:right;margin-right:1rem;flex-shrink:0}.line-content{flex:1;color:var(--text-primary);white-space:pre}.line-content .keyword{color:#c678dd}.line-content .function{color:#61afef}.line-content .variable{color:#e5c07b}.line-content .comment{color:var(--text-muted);font-style:italic}.line-content .operator{color:#56b6c2}.line-content .number{color:#d19a66}.line-content .string{color:#98c379}.line-content .type{color:#e5c07b}.line-content .builtin{color:#e06c75}.line-content .punctuation{color:#abb2bf}[data-theme="light"] .line-content .keyword{color:#a626a4}[data-theme="light"] .line-content .function{color:#4078f2}[data-theme="light"] .line-content .variable{color:#8a5700}[data-theme="light"] .line-content .comment{color:#a0a1a7}[data-theme="light"] .line-content .operator{color:#0184bc}[data-theme="light"] .line-content .number{color:#986801}[data-theme="light"] .line-content .string{color:#50a14f}[data-theme="light"] .line-content .type{color:#8a5700}[data-theme="light"] .line-content .builtin{color:#e45649}.pseudocode-footer{padding:0.5rem 1rem;background:var(--bg-tertiary);border-top:1px solid var(--border-color)}.code-legend{display:flex;gap:1.5rem;font-size:0.7rem;color:var(--text-muted)}.code-legend-item{display:flex;align-items:center;gap:0.4rem}.code-dot{width:8px;height:8px;border-radius:2px}.code-dot.active{background:var(--bar-compare)}.code-dot.executed{background:var(--text-muted);opacity:0.5}@media (max-width:1100px){.step-split-container{flex-wrap:wrap}.step-code-resizer{display:none}.step-code-pane{flex:1 1 100%;width:auto;min-width:0;max-width:100%;max-height:300px;order:2}.step-vis-pane{flex:1 1 100%;order:1}.step-visualizer{height:300px;min-height:300px}}.step-visualizer{background:var(--bg-primary);border:1px solid var(--border-color);border-radius:12px;flex:1 1 0;min-height:350px;width:100%;display:flex;align-items:flex-end;justify-content:center;padding:1.5rem;gap:4px;margin-bottom:1rem}.step-visualizer .bar{flex:1;min-width:8px;max-width:60px;background:var(--bar-default);border-radius:4px 4px 0 0;transition:all 0.3s ease;position:relative}.step-visualizer .bar.show-value::before{content:none;display:none}.step-visualizer .bar.compare{background:var(--bar-compare) !important}.step-visualizer .bar.swap{background:var(--bar-swap) !important}.step-visualizer .bar.sorted{background:var(--bar-sorted) !important}.step-visualizer .bar::after{content:attr(data-value);position:absolute;bottom:100%;left:50%;transform:translateX(-50%);font-size:0.75rem;padding:2px 4px;background:var(--bg-tertiary);border-radius:3px;opacity:0;transition:opacity 0.2s}.step-visualizer .bar:hover::after{opacity:1}.step-legend{display:flex;justify-content:center;gap:2rem;flex-wrap:wrap}.step-legend .legend-item{display:flex;align-items:center;gap:0.5rem;font-size:0.875rem;color:var(--text-secondary)}.step-legend .legend-color{width:16px;height:16px;border-radius:3px}.legend-color.comparing{background:var(--bar-compare)}.legend-color.swapping{background:var(--bar-swap)}.legend-color.sorted{background:var(--bar-sorted)}.step-bookmarks{margin-top:1.5rem;padding:1rem;background:var(--bg-secondary);border-radius:8px;border:1px solid var(--border-color)}.step-bookmarks h4{margin-bottom:0.75rem;font-size:0.9rem;color:var(--text-primary)}.bookmark-list{display:flex;flex-direction:column;gap:0.5rem;max-height:200px;overflow-y:auto;margin-bottom:0.6rem;font-weight:700}.bookmark-item{display:flex;align-items:center;gap:0.75rem;padding:0.5rem 0.75rem;background:var(--bg-tertiary);border-radius:6px;font-size:0.8rem}.bookmark-step{font-weight:600;color:var(--bar-compare);min-width:60px}.bookmark-desc{flex:1;color:var(--text-secondary);overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.bookmark-goto,.bookmark-remove{padding:0.25rem 0.5rem;font-size:0.7rem}.bookmark-remove{color:var(--text-muted)}.bookmark-remove:hover{color:var(--bar-swap)}@media (max-width:768px) and (orientation:portrait),(max-width:480px){#section-step{padding:0.75rem !important}.step-header h2{font-size:1.1rem}.step-header p{font-size:0.75rem}.step-controls{padding:0.75rem;gap:0.75rem;flex-direction:column}.step-config{flex-direction:column;gap:0.5rem;width:100%}.step-config .control-group{width:100%}.step-actions{width:100%;justify-content:stretch}.step-actions .btn{flex:1;min-height:40px}.step-info{flex-direction:column;gap:0.5rem;padding:0.75rem;margin-bottom:0.75rem;text-align:center}.step-counter{font-size:1rem}.step-stats{gap:0.75rem;font-size:0.8rem}.step-split-container{flex-direction:column !important;flex-wrap:nowrap !important;gap:0.75rem}.step-vis-pane{order:1;min-height:200px}.step-visualizer{height:200px !important;min-height:200px !important}.step-code-pane{order:2;flex:none !important;width:100% !important;min-width:0 !important;max-width:100% !important;max-height:250px !important}.step-code-resizer{display:none !important}}.visualizer-3d #visualizer-container,.visualizer-3d .step-visualizer,.visualizer-3d .compare-visualizer{perspective:1000px;transform-style:preserve-3d}.visualizer-3d .bar{position:relative;transform-style:preserve-3d;transform:rotateX(-10deg) rotateY(-15deg);background:linear-gradient(180deg,var(--bar-default) 0%,color-mix(in srgb,var(--bar-default) 70%,black) 100%);border-radius:2px 2px 0 0}.visualizer-3d .bar::before{content:'';position:absolute;top:0;left:100%;width:12px;height:100%;background:linear-gradient(90deg,color-mix(in srgb,var(--bar-default) 60%,black) 0%,color-mix(in srgb,var(--bar-default) 40%,black) 100%);transform:skewY(-45deg);transform-origin:top left}.visualizer-3d .bar::after{content:'';position:absolute;bottom:100%;left:0;width:100%;height:12px;background:linear-gradient(180deg,color-mix(in srgb,var(--bar-default) 90%,white) 0%,var(--bar-default) 100%);transform:skewX(-45deg);transform-origin:bottom left}.visualizer-3d .bar.compare{background:linear-gradient(180deg,var(--bar-compare) 0%,color-mix(in srgb,var(--bar-compare) 70%,black) 100%)}.visualizer-3d .bar.compare::before{background:linear-gradient(90deg,color-mix(in srgb,var(--bar-compare) 60%,black) 0%,color-mix(in srgb,var(--bar-compare) 40%,black) 100%)}.visualizer-3d .bar.compare::after{background:linear-gradient(180deg,color-mix(in srgb,var(--bar-compare) 90%,white) 0%,var(--bar-compare) 100%)}.visualizer-3d .bar.swap{background:linear-gradient(180deg,var(--bar-swap) 0%,color-mix(in srgb,var(--bar-swap) 70%,black) 100%)}.visualizer-3d .bar.swap::before{background:linear-gradient(90deg,color-mix(in srgb,var(--bar-swap) 60%,black) 0%,color-mix(in srgb,var(--bar-swap) 40%,black) 100%)}.visualizer-3d .bar.swap::after{background:linear-gradient(180deg,color-mix(in srgb,var(--bar-swap) 90%,white) 0%,var(--bar-swap) 100%)}.visualizer-3d .bar.sorted{background:linear-gradient(180deg,var(--bar-sorted) 0%,color-mix(in srgb,var(--bar-sorted) 70%,black) 100%)}.visualizer-3d .bar.sorted::before{background:linear-gradient(90deg,color-mix(in srgb,var(--bar-sorted) 60%,black) 0%,color-mix(in srgb,var(--bar-sorted) 40%,black) 100%)}.visualizer-3d .bar.sorted::after{background:linear-gradient(180deg,color-mix(in srgb,var(--bar-sorted) 90%,white) 0%,var(--bar-sorted) 100%)}.visualizer-3d #visualizer-container,.visualizer-3d .step-visualizer{padding:20px 30px 10px 10px}.shared-by-banner{display:flex;align-items:center;justify-content:space-between;background:linear-gradient(135deg,rgba(99,102,241,0.15),rgba(139,92,246,0.15));border:1px solid rgba(139,92,246,0.3);border-radius:12px;padding:0.75rem 1rem;margin-bottom:1rem;animation:slideDown 0.3s ease-out}@keyframes slideDown{from{opacity:0;transform:translateY(-10px)}to{opacity:1;transform:translateY(0)}}.shared-by-content{display:flex;align-items:center;gap:0.75rem}.shared-by-avatar{width:32px;height:32px;border-radius:50%;object-fit:cover;border:2px solid rgba(139,92,246,0.5)}.shared-by-content span{color:var(--text-primary);font-size:0.9rem}.shared-by-content strong{color:var(--text-primary)}.shared-by-close{background:none;border:none;color:var(--text-muted);font-size:1.25rem;cursor:pointer;padding:0.25rem;line-height:1;transition:color 0.2s}.shared-by-close:hover{color:var(--text-primary)}