@import "https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700;800&display=swap";:root{font-synthesis:none;text-rendering:optimizelegibility;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;--lightningcss-light:initial;--lightningcss-dark: ;color-scheme:light;--app-bg:#f7f8fb;--surface:#fff;--surface-muted:#f1f3f8;--text-primary:#202636;--text-secondary:#687386;--text-muted:#929bad;--border-color:#e5e8ef;--accent:#4f46e5;--accent-hover:#4338ca;--success:#15803d;--success-bg:#eaf7ee;--danger:#c2414d;--danger-bg:#fff0f1;--shadow:0 2px 8px #141e3c08;--sidebar-width:258px;--radius:12px;--site-header-height:66px;font-family:Inter,system-ui,sans-serif}:root[data-theme=theme-dark]{--lightningcss-light: ;--lightningcss-dark:initial;color-scheme:dark;--app-bg:#11141b;--surface:#191e28;--surface-muted:#222936;--text-primary:#edf0f7;--text-secondary:#a4aec0;--text-muted:#7e899d;--border-color:#303949;--accent:#9290ff;--accent-hover:#aaa8ff;--success:#68d49a;--success-bg:#19382d;--danger:#ff8d98;--danger-bg:#40252c;--shadow:0 2px 8px #0000001f}*{box-sizing:border-box}html,body,#root{min-width:320px;min-height:100%;margin:0}body{min-height:100vh;color:var(--text-primary);background:var(--app-bg)}button,input,select,textarea{font:inherit}button{cursor:pointer}button:disabled{cursor:not-allowed;opacity:.5}button:focus-visible,input:focus-visible,select:focus-visible,textarea:focus-visible,a:focus-visible{outline:2px solid var(--accent);outline-offset:3px}a{color:var(--accent)}.app-shell{min-height:100vh;color:var(--text-primary);background:var(--app-bg)}.panel,.stat-card,.problem-card,.header-progress,.example-card,.about-hero,.about-feature,.about-how{background:var(--surface);border:1px solid var(--border-color);border-radius:var(--radius);box-shadow:var(--shadow)}.eyebrow{color:var(--accent);letter-spacing:.13em;margin:0;font-size:10px;font-weight:700}.page-subtitle{color:var(--text-secondary);margin:7px 0 0;font-size:13px;line-height:1.7}.muted-text{color:var(--text-secondary);font-size:12px}.site-layout{flex-direction:column;min-height:100dvh;display:flex}.site-header{z-index:20;min-height:var(--site-header-height);background:var(--surface);border-bottom:1px solid var(--border-color);flex-shrink:0;justify-content:space-between;align-items:center;gap:24px;padding:10px clamp(16px,3vw,36px);display:flex;position:sticky;top:0}.site-brand{color:var(--text-primary);letter-spacing:-.3px;background:0 0;border:0;flex-shrink:0;align-items:center;gap:10px;padding:0;font-size:14px;font-weight:750;display:inline-flex}.site-brand .brand-mark{width:36px;height:36px;color:var(--accent);background:var(--surface-muted);border:1px solid var(--border-color);border-radius:10px;place-items:center;display:grid}.site-nav{justify-content:flex-end;align-items:center;gap:6px;display:flex}.site-nav button{min-height:38px;color:var(--text-secondary);background:0 0;border:1px solid #0000;border-radius:8px;justify-content:center;align-items:center;gap:7px;padding:8px 13px;font-size:12px;font-weight:550;transition:color .14s,background .14s;display:inline-flex}.site-nav button:hover,.site-nav button.active{color:var(--accent);background:var(--surface-muted)}.site-nav button.active{font-weight:700}.site-footer{color:var(--text-secondary);background:var(--surface);border-top:1px solid var(--border-color);flex-wrap:wrap;flex-shrink:0;justify-content:space-between;align-items:center;gap:14px 24px;margin-top:auto;padding:20px clamp(16px,3vw,36px);font-size:11px;display:flex}.site-footer-copy strong{color:var(--text-primary)}.site-footer-tagline{color:var(--text-muted)}.site-footer-links{flex-wrap:wrap;align-items:center;gap:16px;display:flex}.site-footer-links a{color:var(--text-secondary);align-items:center;gap:6px;text-decoration:none;transition:color .14s;display:inline-flex}.site-footer-links a:hover{color:var(--accent)}.simple-page-content{flex:1;width:100%;max-width:1500px;margin:0 auto;padding:32px clamp(16px,4vw,56px)}.home-layout{flex:1;align-items:stretch;min-width:0;display:flex}.home-layout>.sidebar{top:var(--site-header-height);z-index:10;flex:0 0 var(--sidebar-width);width:var(--sidebar-width);height:calc(100vh - var(--site-header-height));height:calc(100dvh - var(--site-header-height));color:var(--text-primary);background:var(--surface);border-right:1px solid var(--border-color);flex-direction:column;padding:18px 14px 12px;display:flex;position:sticky;overflow:hidden}.brand{width:100%;color:var(--text-primary);text-align:left;background:0 0;border:0;flex-shrink:0;align-items:center;gap:11px;margin:0 0 22px;padding:8px 5px;display:flex}.brand-mark{width:40px;height:40px;color:var(--accent);background:var(--surface-muted);border:1px solid var(--border-color);border-radius:11px;flex-shrink:0;place-items:center;display:grid}.brand strong,.brand small{display:block}.brand strong{letter-spacing:-.3px;font-size:14px;font-weight:750}.brand small{color:var(--text-secondary);margin-top:4px;font-size:10px}.sidebar-page-links{flex-shrink:0;gap:3px;margin:0 0 18px;display:grid}.sidebar-page-button,.topic-button{width:100%;min-height:38px;color:var(--text-secondary);text-align:left;background:0 0;border:0;border-radius:8px;align-items:center;gap:10px;padding:9px 10px;font-size:12px;transition:background .14s,color .14s;display:flex}.sidebar-page-button svg,.topic-button svg{color:var(--text-muted);flex-shrink:0}.sidebar-page-button:hover,.sidebar-page-button.active,.topic-button:hover,.topic-button.active{color:var(--accent);background:var(--surface-muted)}.sidebar-page-button.active,.topic-button.active{font-weight:650}.sidebar-page-button.active svg,.topic-button.active svg{color:var(--accent)}.sidebar-section-label{color:var(--text-muted);letter-spacing:.12em;flex-shrink:0;padding:0 10px 9px;font-size:10px;font-weight:700}.topic-navigation{overscroll-behavior:contain;scrollbar-width:thin;scrollbar-color:var(--border-color) transparent;flex:auto;align-content:start;gap:3px;min-height:0;padding:0 2px;display:grid;overflow:hidden auto}.topic-button span{flex:1;min-width:0}.topic-button small{color:var(--text-muted);font-variant-numeric:tabular-nums;font-size:10px}.sidebar-bottom{background:var(--surface);border-top:1px solid var(--border-color);flex-direction:column;flex:none;gap:10px;margin-top:12px;padding:12px 2px 0;display:flex}.theme-control{color:var(--text-secondary);gap:6px;font-size:11px;display:grid}.theme-control select{width:100%;min-height:34px;color:var(--text-primary);background:var(--surface);border:1px solid var(--border-color);border-radius:7px;padding:6px 9px;font-size:12px}.reset-progress-button{min-height:34px;color:var(--danger);border:1px solid var(--border-color);background:0 0;border-radius:7px;justify-content:center;align-items:center;gap:7px;padding:7px;font-size:11px;display:inline-flex}.reset-progress-button:hover{background:var(--danger-bg)}.sidebar-social{gap:2px;display:grid}.sidebar-social-heading{color:var(--text-muted);letter-spacing:.12em;margin-bottom:3px;font-size:9px;font-weight:700}.sidebar-social a{min-height:27px;color:var(--text-secondary);border-radius:6px;align-items:center;gap:8px;padding:4px 5px;font-size:11px;text-decoration:none;display:flex}.sidebar-social a:hover{color:var(--accent);background:var(--surface-muted)}.local-runtime-note{color:var(--text-secondary);align-items:center;gap:7px;font-size:10px;display:flex}.status-dot{background:#dca13e;border-radius:50%;flex-shrink:0;width:7px;height:7px;display:inline-block}.status-dot.ready{background:#24a36a}.status-dot.loading{background:#dca13e}.sidebar-copyright{color:var(--text-muted);font-size:9px;line-height:1.5}.sidebar-copyright strong{color:var(--text-primary)}.home-layout>.main-content{flex:1;width:auto;min-width:0;max-width:1500px;min-height:auto;margin-left:0;padding:36px clamp(24px,4vw,56px)}.main-content{width:auto;min-width:0;max-width:1500px;min-height:100vh;margin-left:var(--sidebar-width);padding:36px clamp(24px,4vw,56px)}.home-header{justify-content:space-between;align-items:center;gap:24px;margin-bottom:26px;display:flex}.home-header h1{letter-spacing:-1.1px;margin:8px 0 0;font-size:clamp(25px,2.5vw,31px);font-weight:750}.header-progress{flex-shrink:0;align-items:center;gap:11px;padding:11px 14px;display:flex}.header-progress-icon{width:36px;height:36px;color:var(--success);background:var(--success-bg);border-radius:9px;place-items:center;display:grid}.header-progress strong,.header-progress span{display:block}.header-progress strong{font-variant-numeric:tabular-nums;font-size:14px}.header-progress span{color:var(--text-secondary);margin-top:3px;font-size:10px}.stats-grid{grid-template-columns:repeat(4,minmax(0,1fr));gap:12px;margin:0 0 34px;display:grid}.stat-card{align-content:start;gap:8px;min-width:0;padding:17px 18px;display:grid}.stat-card span{color:var(--text-secondary);font-size:11px}.stat-card strong{letter-spacing:-.8px;font-variant-numeric:tabular-nums;font-size:27px;font-weight:700}.stat-card small{color:var(--text-muted);font-size:10px}.problem-list-section{min-width:0}.problem-list-heading{justify-content:space-between;align-items:center;gap:20px;margin-bottom:15px;display:flex}.problem-list-heading h2{letter-spacing:-.3px;margin:0;font-size:17px;font-weight:700}.problem-list-heading p{color:var(--text-secondary);margin:6px 0 0;font-size:11px}.problem-list-tools{flex-shrink:0;justify-content:flex-end;align-items:center;gap:9px;display:flex}.problem-search{width:min(300px,32vw);min-width:180px;min-height:38px;color:var(--text-muted);background:var(--surface);border:1px solid var(--border-color);border-radius:8px;align-items:center;gap:9px;padding:0 11px;display:flex}.problem-search:focus-within{border-color:var(--accent)}.problem-search input{width:100%;min-width:0;color:var(--text-primary);background:0 0;border:0;outline:0;font-size:12px}.problem-search input::placeholder{color:var(--text-muted)}.reset-progress-toolbar{white-space:nowrap;min-height:38px;padding:7px 10px}.problem-list{gap:8px;display:grid}.problem-card{align-items:center;gap:14px;min-width:0;padding:13px 15px;transition:border-color .14s,background .14s;display:flex}.problem-card:hover{border-color:color-mix(in srgb, var(--accent) 45%, var(--border-color))}.problem-number{width:34px;height:34px;color:var(--text-secondary);background:var(--surface-muted);font-variant-numeric:tabular-nums;border-radius:8px;flex:0 0 34px;place-items:center;font-size:11px;display:grid}.solved-icon{color:var(--success)}.problem-card-main{flex:1;min-width:0}.problem-title-button{max-width:100%;color:var(--text-primary);text-align:left;background:0 0;border:0;padding:0;font-size:13px;font-weight:650;line-height:1.5;display:inline-block}.problem-title-button:hover{color:var(--accent)}.problem-card-meta{color:var(--text-secondary);flex-wrap:wrap;align-items:center;gap:8px;margin-top:6px;font-size:10px;display:flex}.difficulty,.solved-text,.unsolved-text{white-space:nowrap;border-radius:5px;align-items:center;width:fit-content;padding:4px 7px;font-size:10px;font-weight:650;display:inline-flex}.difficulty.easy{color:var(--success);background:var(--success-bg)}.difficulty.medium{color:#a36c12;background:#fff4d9}.difficulty.hard{color:var(--danger);background:var(--danger-bg)}.solved-text{color:var(--success);background:var(--success-bg)}.unsolved-text{color:var(--text-secondary);background:var(--surface-muted)}.solve-button,.primary-button,.secondary-button,.icon-button{border-radius:7px;flex-shrink:0;justify-content:center;align-items:center;gap:7px;min-height:35px;padding:7px 11px;font-size:11px;font-weight:600;transition:background .14s,border-color .14s;display:inline-flex}.solve-button,.primary-button{color:#fff;background:var(--accent);border:1px solid var(--accent)}.solve-button:hover,.primary-button:hover{background:var(--accent-hover);border-color:var(--accent-hover)}.secondary-button,.icon-button{color:var(--text-primary);background:var(--surface);border:1px solid var(--border-color)}.secondary-button:hover,.icon-button:hover{background:var(--surface-muted)}.empty-state{color:var(--text-secondary);text-align:center;background:var(--surface);border:1px dashed var(--border-color);border-radius:var(--radius);justify-items:center;gap:10px;padding:48px 16px;display:grid}.empty-state h3{color:var(--text-primary);margin:0;font-size:15px}.empty-state p{margin:0 0 8px;font-size:12px}.home-footer{color:var(--text-secondary);border-top:1px solid var(--border-color);justify-content:space-between;align-items:center;gap:12px;margin-top:32px;padding-top:16px;font-size:10px;display:flex}.home-footer span{align-items:center;gap:6px;display:flex}.workspace{background:var(--app-bg);min-height:100vh}.workspace-header{z-index:5;background:var(--surface);border-bottom:1px solid var(--border-color);justify-content:space-between;align-items:center;gap:16px;min-height:60px;padding:10px 20px;display:flex;position:sticky;top:0}.back-button,.reset-button{color:var(--text-secondary);background:0 0;border:0;border-radius:6px;justify-content:center;align-items:center;gap:7px;padding:7px;font-size:12px;display:inline-flex}.back-button:hover,.reset-button:hover{color:var(--text-primary);background:var(--surface-muted)}.workspace-brand{color:var(--text-primary);white-space:nowrap;align-items:center;gap:8px;font-size:13px;font-weight:700;display:flex}.workspace-brand svg,.editor-title svg{color:var(--accent)}.workspace-settings,.workspace-topbar-right{justify-content:flex-end;align-items:center;gap:8px;display:flex}.language-select,.theme-select,.select-label select{max-width:150px;min-height:34px;color:var(--text-primary);background:var(--surface);border:1px solid var(--border-color);border-radius:7px;padding:6px 9px;font-size:11px}.workspace-body{grid-template-columns:minmax(0,.9fr) minmax(0,1.1fr);align-items:stretch;gap:12px;min-height:calc(100vh - 60px);padding:12px;display:grid}.description-panel,.editor-panel{background:var(--surface);border:1px solid var(--border-color);border-radius:10px;min-width:0;min-height:0;overflow:auto}.editor-panel{flex-direction:column;display:flex}.workspace-tabs{z-index:2;background:var(--surface);border-bottom:1px solid var(--border-color);gap:20px;padding:0 18px;display:flex;position:sticky;top:0}.workspace-tabs button{color:var(--text-secondary);background:0 0;border:0;border-bottom:2px solid #0000;padding:14px 0;font-size:12px}.workspace-tabs button.selected{color:var(--accent);border-bottom-color:var(--accent);font-weight:650}.problem-description,.description-content{color:var(--text-primary);padding:20px;font-size:13px;line-height:1.8}.problem-heading{flex-wrap:wrap;align-items:center;gap:10px;display:flex}.problem-heading h1{letter-spacing:-.6px;margin:0;font-size:22px}.problem-heading-title{flex-wrap:wrap;align-items:center;gap:10px;display:flex}.problem-heading-title h1{margin:0;font-size:22px}.problem-meta{color:var(--text-secondary);flex-wrap:wrap;align-items:center;gap:9px;margin-top:8px;font-size:11px;display:flex}.description-text{color:var(--text-secondary);margin:18px 0;line-height:1.9}.problem-description h3,.description-content h3{margin:22px 0 10px;font-size:14px}.example-block{margin-bottom:14px}.example-block>strong{font-size:12px}.example-block pre{color:var(--text-primary);background:var(--surface-muted);border:1px solid var(--border-color);white-space:pre-wrap;overflow-wrap:anywhere;border-radius:7px;margin:8px 0 0;padding:12px;font-family:ui-monospace,SFMono-Regular,Consolas,monospace;font-size:12px;line-height:1.7;overflow:auto}.example-block pre span{color:var(--accent);font-weight:600}.example-card{overflow-wrap:anywhere;gap:7px;margin:10px 0;padding:12px;font-size:12px;display:grid}.example-card code,.test-result-detail code{white-space:pre-wrap;overflow-wrap:anywhere}.constraints-list{color:var(--text-secondary);gap:8px;padding-left:20px;font-size:12px;line-height:1.7;display:grid}.editor-toolbar,.panel-heading{background:var(--surface);border-bottom:1px solid var(--border-color);flex-shrink:0;justify-content:space-between;align-items:center;gap:12px;min-height:47px;padding:9px 14px;display:flex}.editor-title{align-items:center;gap:8px;font-size:12px;font-weight:650;display:flex}.panel-heading h2{margin:0;font-size:13px}.icon-button{min-height:30px;padding:5px 8px}.codemirror-container{background:var(--surface);flex:auto;min-height:260px;overflow:auto}.codemirror-host,.codemirror-host .cm-editor,.code-editor-host,.code-editor-host .cm-editor{width:100%;height:100%;min-height:260px}.codemirror-host .cm-focused,.code-editor-host .cm-focused{outline:none}.codemirror-host .cm-content,.code-editor-host .cm-content{padding-top:12px;padding-bottom:20px}.editor-footer{color:var(--text-secondary);background:var(--surface);border-top:1px solid var(--border-color);flex-shrink:0;justify-content:space-between;align-items:center;gap:10px;padding:10px 14px;font-size:10px;display:flex}.run-toolbar{background:var(--surface);border-top:1px solid var(--border-color);flex-wrap:wrap;flex-shrink:0;justify-content:space-between;align-items:center;gap:10px;padding:11px 14px;display:flex}.run-hint{color:var(--text-secondary);overflow-wrap:anywhere;font-size:10px}.run-actions{flex-shrink:0;gap:7px;display:flex}.run-button,.submit-button{min-height:34px;color:var(--accent);background:var(--surface-muted);border:1px solid var(--border-color);border-radius:7px;justify-content:center;align-items:center;gap:6px;padding:7px 11px;font-size:11px;font-weight:600;display:inline-flex}.run-button:hover{border-color:var(--accent)}.submit-button{color:#fff;background:var(--accent);border-color:var(--accent)}.submit-button:hover{background:var(--accent-hover)}.output-panel{min-height:130px;max-height:350px;color:var(--text-primary);background:var(--surface-muted);border-top:1px solid var(--border-color);flex:0 250px;margin:0;padding:13px 14px;font-size:12px;line-height:1.7;overflow:auto}.output-heading{justify-content:space-between;align-items:center;gap:10px;margin-bottom:10px;display:flex}.output-heading>span,.console-label{color:var(--text-secondary);font-size:10px}.console-label{letter-spacing:.05em;text-transform:uppercase;margin-bottom:6px;font-weight:700;display:block}.console-section{background:var(--surface);border:1px solid var(--border-color);border-radius:7px;min-width:0;margin-top:9px;padding:10px}.console-section pre,.output-panel pre,.test-result pre,.output-block pre,.error-message pre{max-width:100%;color:var(--text-primary);white-space:pre-wrap;overflow-wrap:anywhere;margin:0;font-family:ui-monospace,SFMono-Regular,Consolas,monospace;font-size:11px;line-height:1.7;overflow:auto}.empty-output{color:var(--text-muted)}.stderr-output{color:var(--danger)}.results-history{padding:18px}.results-history>h3{margin-top:0;font-size:14px}.results-history>p{color:var(--text-secondary);font-size:12px}.test-result{border:1px solid var(--border-color);overflow-wrap:anywhere;border-radius:8px;gap:9px;min-width:0;margin-top:10px;padding:12px;font-size:11px;display:grid}.test-result>strong{margin-bottom:4px;display:block}.test-result.passed{background:var(--success-bg);border-color:color-mix(in srgb, var(--success) 25%, var(--border-color))}.test-result.failed{background:var(--danger-bg);border-color:color-mix(in srgb, var(--danger) 25%, var(--border-color))}.test-result p{margin-bottom:0;line-height:1.7}.test-result-heading,.workspace-bottom-navigation{justify-content:space-between;align-items:center;gap:12px;display:flex}.test-result-detail{grid-template-columns:70px minmax(0,1fr);gap:9px;font-size:11px;display:grid}.test-result-detail>span,.output-block>span{color:var(--text-secondary);font-size:10px}.result-summary{font-size:12px;font-weight:700}.result-summary.passed,.test-passed{color:var(--success)}.result-summary.failed,.test-failed{color:var(--danger)}.execution-metrics{grid-template-columns:repeat(2,minmax(0,1fr));gap:9px;display:grid}.execution-metrics>div{background:var(--surface-muted);border-radius:7px;gap:6px;padding:11px;display:grid}.execution-metrics span{color:var(--text-secondary);font-size:10px}.execution-metrics strong{font-size:13px}.results-content{gap:11px;padding:14px;display:grid}.output-block{gap:6px;display:grid}.error-message{color:var(--danger);background:var(--danger-bg);border-radius:8px;gap:8px;padding:11px;display:grid}.workspace-bottom-navigation{border-top:1px solid var(--border-color);padding-top:12px}.resizable-workspace{grid-template-rows:minmax(0,1fr);align-items:stretch;height:calc(100vh - 60px);min-height:520px;display:grid;overflow:hidden}.resizable-workspace>.description-panel,.resizable-workspace .editor-panel,.resizable-workspace>.workspace-right>.output-panel{resize:none;min-width:0;min-height:0;overflow:auto}.workspace-splitter{color:var(--text-muted);background:var(--surface-muted);touch-action:none;-webkit-user-select:none;user-select:none;cursor:col-resize;border-radius:5px;justify-content:center;align-items:center;display:flex}.workspace-splitter:hover,.workspace-splitter:active{color:var(--accent);background:color-mix(in srgb, var(--accent) 12%, var(--surface-muted))}.workspace-right{gap:0;min-width:0;min-height:0;display:grid;overflow:hidden}.workspace-right>.editor-panel,.workspace-right>.output-panel{min-width:0;min-height:0}.workspace-right>.editor-panel{overflow:hidden}.workspace-right .codemirror-container{flex:auto;min-height:80px;overflow:hidden}.workspace-right .codemirror-host,.workspace-right .cm-editor{height:100%}.workspace-right>.output-panel{border-radius:0 0 10px 10px;max-height:none;overflow:auto}.horizontal-splitter{cursor:row-resize}.about-hero{padding:clamp(22px,4vw,34px)}.about-hero h1{letter-spacing:-1.2px;margin:10px 0;font-size:clamp(28px,4vw,38px)}.about-tagline{color:var(--accent);font-weight:600}.about-description{max-width:680px;color:var(--text-secondary);font-size:13px;line-height:1.9}.about-joke{color:var(--accent);background:var(--surface-muted);border-radius:8px;align-items:center;gap:8px;margin-top:12px;padding:9px 12px;font-size:12px;font-weight:600;display:inline-flex}.about-feature-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:14px;margin:18px 0;display:grid}.about-feature{padding:19px}.about-feature-icon{color:var(--accent)}.about-feature h2,.about-how h2{font-size:15px}.about-feature p,.about-how li{color:var(--text-secondary);font-size:12px;line-height:1.8}.about-how{padding:20px}.about-how ol{padding-left:22px}.playground-page{flex-direction:column;gap:16px;display:flex}.playground-header{flex-wrap:wrap;justify-content:space-between;align-items:center;gap:16px;display:flex}.playground-header h1{letter-spacing:-.8px;margin:8px 0 0;font-size:clamp(25px,3vw,31px)}.playground-actions{gap:8px;display:flex}.playground-editor,.playground-output{overflow:hidden}.playground-code{background:var(--surface);height:min(58vh,620px);min-height:300px;overflow:auto}.playground-code .cm-editor{height:100%;font-size:13px}.playground-code .cm-editor.cm-focused{outline:none}.playground-console{min-height:100px;max-height:280px;color:var(--text-primary);background:var(--surface-muted);white-space:pre-wrap;overflow-wrap:anywhere;margin:0;padding:14px 16px;font-family:ui-monospace,SFMono-Regular,Consolas,monospace;font-size:12px;line-height:1.8;overflow:auto}.playground-note{color:var(--text-secondary);align-items:flex-start;gap:9px;margin:0;font-size:11px;line-height:1.8;display:flex}.playground-note>svg{color:var(--accent);flex-shrink:0;margin-top:2px}.playground-note a{text-underline-offset:3px}.spin{animation:1s linear infinite playground-spin}@keyframes playground-spin{to{transform:rotate(360deg)}}@media (width<=1100px){:root{--sidebar-width:225px}.home-layout>.main-content{padding:28px 24px}.stats-grid{gap:9px}.stat-card{padding:14px}.workspace-body{grid-template-columns:minmax(0,.85fr) minmax(0,1.15fr)}.problem-list-tools .problem-search{width:min(260px,26vw)}}@media (width<=850px){.site-header{gap:12px;padding-inline:16px}.site-nav{gap:2px}.site-nav button{padding-inline:9px}.site-footer{text-align:center;justify-content:center}.stats-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.workspace-body{grid-template-columns:minmax(0,1fr);min-height:0}.description-panel{max-height:50vh}.editor-panel{min-height:560px}.resizable-workspace{flex-direction:column;height:auto;min-height:0;display:flex;overflow:visible}.resizable-workspace>.description-panel{min-height:260px;max-height:45vh}.resizable-workspace>.workspace-splitter{display:none}.workspace-right{flex-direction:column;gap:10px;display:flex;overflow:visible}.workspace-right>.editor-panel{min-height:480px}.workspace-right>.output-panel{border-radius:10px;min-height:180px;max-height:45vh}.problem-list-heading{align-items:flex-start}.problem-list-tools{gap:7px}.problem-list-tools .problem-search{width:220px;min-width:150px}}@media (width<=700px){.site-header{flex-direction:column;align-items:flex-start;gap:10px;padding:12px 14px;position:relative}.site-nav{justify-content:flex-start;width:100%}.site-nav button{min-height:34px;padding:7px 10px}.home-layout{flex-direction:column}.home-layout>.sidebar{border-right:0;border-bottom:1px solid var(--border-color);flex:none;width:100%;height:auto;min-height:0;padding:12px;position:relative;top:auto;overflow:visible}.home-layout>.sidebar .brand,.home-layout>.sidebar .sidebar-page-links{display:none}.home-layout>.sidebar .sidebar-section-label{padding:4px 7px 8px}.home-layout>.sidebar .topic-navigation{flex:none;gap:5px;padding-bottom:4px;display:flex;overflow:auto hidden}.home-layout>.sidebar .topic-button{flex:none;width:auto;min-height:34px;padding:8px 10px}.home-layout>.sidebar .topic-button small{margin-left:2px}.home-layout>.sidebar .sidebar-bottom{flex-flow:wrap;align-items:center;gap:8px;margin-top:10px;padding:10px 0 0;display:flex}.home-layout>.sidebar .theme-control{flex:1;min-width:130px}.home-layout>.sidebar .reset-progress-button{flex:none}.home-layout>.main-content{width:100%;margin-left:0;padding:24px 16px}.simple-page-content{padding:20px 14px}.home-header,.problem-list-heading{flex-direction:column;align-items:stretch}.header-progress{align-self:flex-start}.problem-list-tools{flex-wrap:wrap;align-items:stretch;width:100%}.problem-list-tools .problem-search{flex:180px;width:auto;min-width:0}.reset-progress-toolbar{flex:none;padding-inline:9px}.problem-card{gap:10px;padding:12px}.solve-button{min-height:32px;padding:6px 9px}.home-footer{flex-direction:column;align-items:flex-start}.workspace-header{flex-wrap:wrap;padding:12px;position:relative}.workspace-settings{justify-content:flex-end;width:100%}.workspace-body{gap:10px;padding:10px}.problem-description,.description-content{padding:16px}.problem-heading h1,.problem-heading-title h1{font-size:20px}.about-feature-grid{grid-template-columns:1fr}.playground-header{flex-direction:column;align-items:stretch}.playground-actions{justify-content:flex-end}.playground-code{height:50vh;min-height:280px}.site-footer{flex-direction:column;gap:12px;padding:18px 14px}.site-footer-links{justify-content:center}}@media (width<=420px){.site-brand{font-size:13px}.site-nav button{gap:5px;padding-inline:8px;font-size:11px}.site-nav button svg{width:14px;height:14px}.home-layout>.main-content{padding:20px 12px}.stats-grid{gap:8px}.stat-card{padding:12px}.stat-card strong{font-size:23px}.problem-card{flex-wrap:wrap}.problem-card-main{flex-basis:calc(100% - 48px)}.problem-card .solve-button{margin-left:auto}.problem-card-meta{gap:6px}.reset-progress-toolbar{padding-inline:8px;font-size:10px}.workspace-header{gap:10px}.workspace-brand{font-size:12px}.language-select,.theme-select{max-width:48%}.run-toolbar{flex-direction:column;align-items:stretch}.run-actions{justify-content:flex-end}.editor-footer{align-items:flex-start}.test-result-detail{grid-template-columns:1fr;gap:4px}.execution-metrics{grid-template-columns:repeat(2,minmax(0,1fr))}.site-footer-links{gap:12px}}@media (prefers-reduced-motion:reduce){*,:before,:after{scroll-behavior:auto!important;transition-duration:.01ms!important;animation-duration:.01ms!important;animation-iteration-count:1!important}}.site-brand{align-items:center;gap:10px;display:inline-flex}.brand-logo{object-fit:contain;flex-shrink:0;width:32px;height:32px}