:root{color-scheme:dark;--bg:#111315;--surface:#191c1f;--raised:#22262a;--editor:#141719;--text:#eeefef;--muted:#a3aaae;--line:#30363a;--accent:#91dfb2;--accent-text:#102a1a;--active:#20372b;--amber:#f0c582;--blue:#a3c6f3;--pink:#e2acd0;--shadow:0 18px 70px #0005;font-family:Inter,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;font-size:14px;letter-spacing:0}
:root[data-theme=light]{color-scheme:light;--bg:#f2f4f4;--surface:#fff;--raised:#f0f3f3;--editor:#fafbfb;--text:#202629;--muted:#5d696e;--line:#dce2e4;--accent:#176b43;--accent-text:#fff;--active:#e2f1e8;--amber:#895313;--blue:#205b9b;--pink:#8a3973;--shadow:0 18px 70px #18242b15}
*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--text)}button,input,textarea,select{font:inherit;color:inherit}button,select{cursor:pointer}button{border:0}button:disabled{cursor:not-allowed;opacity:.4}button:focus-visible,a:focus-visible,select:focus-visible,input:focus-visible,textarea:focus-visible{outline:2px solid var(--accent);outline-offset:3px}button,a,input,textarea,select{-webkit-tap-highlight-color:transparent}a{color:var(--accent)}h1,h2,h3,p{margin:0}h1{font-size:25px;line-height:1.3;font-weight:600}h2{font-size:17px;font-weight:600}h3{font-size:14px;font-weight:600}svg{width:18px;height:18px;flex-shrink:0;stroke-width:1.7}.boot{padding:40px;font-size:26px}.skip-link{position:fixed;top:-100px;left:20px;z-index:20;padding:12px;background:var(--accent);color:var(--accent-text)}.skip-link:focus{top:10px}
.app-shell{height:100dvh;display:grid;grid-template-rows:65px 1fr 32px;overflow:hidden}.topbar{display:flex;align-items:center;justify-content:space-between;padding:0 28px;border-bottom:1px solid var(--line);gap:16px}.brand{display:flex;align-items:center;gap:11px;font-size:19px;font-weight:650;white-space:nowrap}.brand-symbol{color:var(--accent);display:flex}.brand-symbol svg{width:27px;height:27px}.brand small{font-size:11px;font-weight:500;color:var(--muted);border-left:1px solid var(--line);padding-left:12px;margin-left:6px}.top-actions,.toolbar,.inline,.heading-row{display:flex;align-items:center;gap:10px}.top-actions select{background:transparent;border:1px solid var(--line);padding:7px 8px;border-radius:5px;font-size:12px;max-width:115px}.icon-button{display:inline-flex;align-items:center;justify-content:center;width:32px;height:32px;border-radius:5px;background:transparent;color:var(--muted);flex-shrink:0}.icon-button:hover{background:var(--raised);color:var(--text)}.text-button{background:transparent;color:var(--muted);display:inline-flex;align-items:center;gap:8px;padding:8px 10px;border-radius:5px;font-size:13px}.text-button:hover{background:var(--raised);color:var(--text)}.status{display:flex;align-items:center;gap:7px;font-size:11px;color:var(--muted);white-space:nowrap}.status-dot{width:6px;height:6px;border-radius:50%;background:var(--accent)}.status.offline .status-dot{background:var(--amber)}
.main{min-height:0;display:flex;flex-direction:column;padding:24px 28px 18px;max-width:1800px;width:100%;margin:auto}.intro{display:flex;align-items:center;justify-content:space-between;gap:15px;margin-bottom:22px}.intro p{color:var(--muted);font-size:13px;margin-top:7px;line-height:1.5}.eyebrow{font-size:10px;text-transform:uppercase;letter-spacing:1px;color:var(--accent);margin-bottom:7px}.workspace{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:18px;min-height:0;flex:1}.code-pane,.result-pane{background:var(--surface);border:1px solid var(--line);border-radius:8px;min-height:0;min-width:0;overflow:hidden;display:flex;flex-direction:column}.pane-heading{height:49px;padding:0 15px;display:flex;align-items:center;justify-content:space-between;flex-shrink:0;border-bottom:1px solid var(--line);gap:8px}.filename{font-family:ui-monospace,SFMono-Regular,Consolas,monospace;font-size:12px;display:flex;align-items:center;gap:8px}.filename svg{color:var(--amber);width:16px}.tag{font-size:10px;color:var(--muted);border:1px solid var(--line);border-radius:4px;padding:3px 5px;white-space:nowrap}.editor{position:relative;flex:1;min-height:150px;background:var(--editor);overflow:hidden}.code-layer,.code-input{margin:0;border:0;padding:22px 20px 40px 58px;font:13px/26px ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;tab-size:4;white-space:pre;overflow:auto;letter-spacing:0;position:absolute;inset:0;width:100%;height:100%;border-radius:0}.code-layer{pointer-events:none;color:var(--text);scrollbar-width:none}.code-layer::-webkit-scrollbar{display:none}.code-input{background:transparent;color:transparent;caret-color:var(--text);resize:none;-webkit-text-fill-color:transparent}.code-input::selection{background:#779cbd55}.code-input:focus-visible{outline:none}.editor:focus-within{box-shadow:inset 0 0 0 1px var(--accent)}.code-line{display:block;height:26px;min-width:max-content;position:relative}.code-line.active{background:var(--active);box-shadow:-58px 0 var(--active),20px 0 var(--active)}.line-number{position:absolute;left:-43px;width:25px;text-align:right;color:#727d82;user-select:none}.code-line.active .line-number{color:var(--accent)}.token.comment{color:#84968c}.token.keyword,.token.boolean{color:var(--pink)}.token.string,.token.char{color:var(--accent)}.token.number{color:var(--amber)}.token.class-name,.token.function{color:var(--blue)}.token.operator,.token.punctuation{color:var(--muted)}.code-meta{display:flex;align-items:center;justify-content:space-between;padding:7px 15px;font-size:10px;color:var(--muted);border-top:1px solid var(--line);gap:10px}.context-input{padding:14px 16px;border-top:1px solid var(--line)}.context-input label{display:flex;align-items:center;gap:7px;font-size:11px;color:var(--muted);margin-bottom:8px}.context-input label svg{width:14px;height:14px}.context-input textarea{display:block;width:100%;height:52px;resize:vertical;max-height:100px;min-height:45px;background:transparent;border:0;font-size:12px;line-height:1.7;padding:0}.context-input textarea::placeholder{color:var(--muted);opacity:.7}.editor-bottom{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:14px 16px;border-top:1px solid var(--line)}.privacy{font-size:10px;line-height:1.6;color:var(--muted);max-width:210px;display:flex;gap:7px}.privacy svg{width:13px;height:13px;margin-top:1px}.primary,.secondary{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:10px 15px;min-height:39px;border-radius:5px;font-weight:600;font-size:12px;white-space:nowrap}.primary{background:var(--accent);color:var(--accent-text)}.primary:hover{filter:brightness(1.08)}.secondary{background:var(--raised);border:1px solid var(--line);color:var(--text)}.primary svg,.secondary svg{width:15px;height:15px}.spin{animation:spin 1s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}
.result-tabs{display:flex;align-items:stretch;gap:14px;height:49px;padding:0 16px;flex-shrink:0;border-bottom:1px solid var(--line);overflow:auto}.tab{position:relative;display:flex;align-items:center;justify-content:center;gap:6px;white-space:nowrap;background:transparent;color:var(--muted);font-size:11px;padding:0 2px;min-height:46px}.tab svg{width:14px;height:14px}.tab[aria-selected=true]{color:var(--accent)}.tab[aria-selected=true]:after{content:"";position:absolute;bottom:0;height:2px;left:0;right:0;background:var(--accent)}.result-body{flex:1;min-height:0;overflow:auto;scrollbar-width:thin}.trace-header{padding:21px 22px 16px}.heading-row{justify-content:space-between}.heading-row span{font-size:11px;color:var(--muted);white-space:nowrap}.trace-header p{font-size:11px;color:var(--muted);margin-top:8px;line-height:1.6}.progress-track{height:3px;background:var(--line);margin:0 22px}.progress-fill{height:100%;background:var(--accent);transition:width .15s}.current-line{padding:17px 22px;border-bottom:1px solid var(--line)}.mini-label{font-size:10px;text-transform:uppercase;letter-spacing:.8px;color:var(--muted);margin-bottom:9px;display:block}.current-line code{font:12px/1.8 ui-monospace,SFMono-Regular,Consolas,monospace;white-space:pre-wrap;overflow-wrap:anywhere;color:var(--accent)}.step-explanation{padding:17px 22px;font-size:13px;line-height:1.8;border-bottom:1px solid var(--line)}.state-section{padding:18px 22px}.section-label{display:flex;align-items:center;gap:7px;color:var(--muted);font-size:11px;margin-bottom:12px}.section-label svg{width:14px;height:14px}.variable{border-bottom:1px solid var(--line);padding:12px 0}.variable:first-of-type{padding-top:0}.variable:last-child{border-bottom:0}.var-header{display:flex;justify-content:space-between;align-items:center;gap:10px;font:12px/1.6 ui-monospace,SFMono-Regular,Consolas,monospace}.var-name{display:flex;gap:9px;align-items:center;min-width:0;overflow-wrap:anywhere}.var-type{font-size:10px;color:var(--muted)}.var-value{color:var(--amber);font-size:12px;max-width:60%;overflow-wrap:anywhere}.changed-label{font-size:9px;color:var(--accent)}.array-cells{display:flex;gap:7px;overflow:auto;padding:10px 0 2px}.array-cell{min-width:73px;max-width:180px;flex-shrink:0;text-align:center}.array-cell small{display:block;color:var(--muted);font:10px ui-monospace,monospace;margin-bottom:6px}.array-cell code{display:block;border:1px solid var(--line);background:var(--editor);border-radius:4px;padding:10px 8px;min-height:36px;overflow-wrap:anywhere;font:12px ui-monospace,monospace}.array-cell.changed code{border-color:var(--accent);background:var(--active)}.null{color:var(--muted);font-style:italic}.console{margin:0 22px 20px;border-top:1px solid var(--line);padding-top:16px}.console pre{min-height:37px;max-height:140px;overflow:auto;margin:0;color:var(--accent);white-space:pre-wrap;overflow-wrap:anywhere;font:12px/1.8 ui-monospace,monospace}.muted{color:var(--muted)}.trace-controls{display:flex;align-items:center;justify-content:space-between;gap:8px;padding:12px 18px;border-top:1px solid var(--line);flex-shrink:0}.trace-controls .inline{gap:5px}.range{accent-color:var(--accent);width:100%;margin:14px 0 0}.trace-footer{padding:0 22px 12px}.result-footnote{display:flex;gap:6px;align-items:center;font-size:10px;color:var(--muted);padding:10px 18px;border-top:1px solid var(--line);line-height:1.5}.result-footnote svg{width:12px;height:12px}.result-footnote button{padding:0;background:transparent;color:var(--accent);font-size:10px;margin-left:auto;white-space:nowrap}
.reading{padding:22px}.reading>p{font-size:13px;line-height:1.85;margin:12px 0 20px}.notice{padding:12px;border-left:2px solid var(--amber);background:var(--raised);font-size:12px;line-height:1.7;margin:15px 0;overflow-wrap:anywhere}.notice.error{border-color:#f18d8d}.concept{padding:16px 0;border-top:1px solid var(--line)}.concept h3{color:var(--blue);font-family:ui-monospace,monospace;font-size:12px}.concept p,.example-result p{font-size:12px;line-height:1.8;margin-top:7px}.example-result{padding:18px 0;border-top:1px solid var(--line)}.example-result pre{font:12px/1.8 ui-monospace,monospace;background:var(--editor);padding:12px;white-space:pre-wrap;overflow-wrap:anywhere;border-left:2px solid var(--accent);margin:10px 0}.quiz-options{display:grid;gap:10px;margin:20px 0}.quiz-option{background:transparent;border:1px solid var(--line);border-radius:5px;padding:14px;display:flex;gap:12px;text-align:left;font-size:12px;line-height:1.6}.quiz-option span{font:11px ui-monospace,monospace;color:var(--muted)}.quiz-option.correct{border-color:var(--accent);background:var(--active)}.quiz-option.wrong{border-color:#db8a8a}.empty{min-height:100%;display:flex;flex-direction:column;align-items:center;justify-content:center;text-align:center;padding:35px;gap:15px}.empty>svg{color:var(--accent);width:32px;height:32px}.empty p{font-size:12px;line-height:1.8;color:var(--muted);max-width:330px}.error-banner{background:var(--raised);color:var(--amber);padding:12px 20px;font-size:12px;line-height:1.7;display:flex;gap:10px;align-items:center;border-bottom:1px solid var(--line)}.error-banner .icon-button{margin-left:auto}.chat-view{display:flex;flex-direction:column;height:100%}.chat-context{padding:12px 18px;font-size:11px;border-bottom:1px solid var(--line);color:var(--muted);display:flex;align-items:center;gap:7px}.chat-context svg{width:13px}.messages{flex:1;overflow:auto;padding:18px;display:flex;flex-direction:column;gap:18px}.message{font-size:12px;line-height:1.85;overflow-wrap:anywhere;white-space:pre-wrap}.message-head{font-size:10px;display:flex;align-items:center;gap:6px;color:var(--accent);margin-bottom:5px;font-weight:600}.message.user{background:var(--raised);border:1px solid var(--line);border-radius:6px;padding:10px 12px;align-self:flex-end;max-width:90%}.message.user .message-head{color:var(--muted)}.message pre{background:var(--editor);padding:12px;overflow:auto;font:11px/1.8 ui-monospace,monospace;white-space:pre;margin:8px 0}.message code{font-family:ui-monospace,monospace}.chat-prompts{display:flex;flex-wrap:wrap;gap:6px;padding:10px 18px}.chat-prompts button{background:transparent;color:var(--muted);font-size:10px;border:1px solid var(--line);border-radius:4px;padding:7px 9px;text-align:left}.chat-prompts button:hover{color:var(--text);border-color:var(--muted)}.chat-compose{display:flex;align-items:flex-end;gap:10px;margin:0 18px 16px;padding:8px;border:1px solid var(--line);border-radius:6px}.chat-compose:focus-within{border-color:var(--accent)}.chat-compose textarea{flex:1;min-width:0;border:0;background:transparent;resize:none;height:50px;max-height:100px;padding:5px;font-size:12px;line-height:1.6}.chat-compose textarea:focus-visible{outline:0}.chat-compose .primary{width:34px;min-height:34px;padding:8px}.footer{border-top:1px solid var(--line);padding:0 28px;display:flex;align-items:center;justify-content:space-between;font-size:10px;color:var(--muted);gap:10px}.footer a{color:var(--muted);text-decoration:none}.footer a:hover{color:var(--accent)}
dialog{background:var(--surface);color:var(--text);border:1px solid var(--line);border-radius:8px;padding:0;width:460px;max-width:calc(100vw - 24px);max-height:80dvh;box-shadow:var(--shadow)}dialog::backdrop{background:#0008;backdrop-filter:blur(3px)}.dialog-header{display:flex;justify-content:space-between;align-items:center;padding:16px 20px;border-bottom:1px solid var(--line)}.example-list{padding:8px 12px}.example-item{width:100%;display:flex;align-items:center;gap:14px;padding:16px 10px;text-align:left;background:transparent;border-bottom:1px solid var(--line)}.example-item:last-child{border-bottom:0}.example-item:hover{background:var(--raised)}.example-item>svg{color:var(--accent);width:20px;height:20px}.example-item strong{display:block;font-size:13px;font-weight:500}.example-item small{display:block;margin-top:5px;color:var(--muted);font-size:11px}.example-item .arrow{margin-left:auto;width:15px;color:var(--muted)}.toast{position:fixed;bottom:45px;left:50%;transform:translateX(-50%);padding:10px 18px;border:1px solid var(--line);background:var(--raised);box-shadow:var(--shadow);font-size:12px;border-radius:5px;z-index:30;max-width:90vw;text-align:center}
@media(min-width:1500px){.workspace{grid-template-columns:minmax(0,1.05fr) minmax(0,1fr)}.code-layer,.code-input{font-size:14px;line-height:28px}.code-line{height:28px}}
@media(max-width:1050px){.topbar{padding:0 18px}.main{padding:20px 18px 14px}.workspace{gap:12px;grid-template-columns:minmax(0,.9fr) minmax(0,1fr)}.brand small{display:none}.result-tabs{gap:10px;padding:0 12px}.tab{font-size:10px;gap:4px}.tab svg{width:12px}.privacy{max-width:150px}.trace-header,.current-line,.step-explanation,.state-section,.reading{padding-left:17px;padding-right:17px}.editor-bottom{padding:12px}.primary,.secondary{padding:10px 12px}.code-layer,.code-input{padding-left:48px;font-size:12px}}
@media(max-width:760px){.app-shell{height:auto;min-height:100dvh;overflow:visible;grid-template-rows:58px 1fr auto}.topbar{padding:0 14px}.brand{font-size:17px;gap:8px}.brand-symbol svg{width:22px}.top-actions{gap:4px}.top-actions .status{display:none}.text-button{padding:7px;font-size:11px}.text-button svg{width:15px}.top-actions select{font-size:11px;padding:6px;max-width:92px}.main{padding:21px 12px 16px}.intro{margin:0 3px 18px;align-items:flex-start}.intro p{font-size:12px;max-width:290px}.intro>.tag{display:none}h1{font-size:23px}.workspace{display:flex;flex-direction:column;gap:15px}.code-pane{height:490px;flex-shrink:0}.editor{min-height:190px}.result-pane{height:650px;flex-shrink:0}.result-tabs{gap:14px;padding:0 15px}.tab{font-size:11px;flex:1}.tab svg{display:none}.privacy{max-width:180px;font-size:9px}.editor-bottom{padding:12px 14px}.context-input{padding:11px 14px}.context-input textarea{height:45px}.trace-header{padding-top:18px}.footer{padding:12px 15px;font-size:9px;align-items:flex-start}.footer span{max-width:230px;line-height:1.6}.code-layer,.code-input{font-size:12px;line-height:25px;padding-top:15px}.code-line{height:25px}.trace-controls{padding:12px}.trace-controls .secondary{font-size:11px;padding:10px}.chat-context{font-size:10px}.array-cell{min-width:65px}.example-item{min-height:78px}}
.main{margin:0 auto;height:100%}.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}.quiz-option:disabled{opacity:1}.result-footnote button{min-height:24px}.tab:hover{color:var(--text)}
@media(prefers-reduced-motion:reduce){*,*:before,*:after{animation:none!important;transition:none!important;scroll-behavior:auto!important}}
.mobile-views{display:none}
.java-verification .heading-row h2{display:flex;align-items:center;gap:7px}.runtime-availability{font:10px ui-monospace,monospace}.jvm-settings{border:0;padding:0;margin:16px 0 0;min-width:0}.jvm-options{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:12px}.jvm-options label,.stdin-label{display:block;font-size:11px;color:var(--muted);line-height:1.6}.jvm-options select,.jvm-options input{margin-top:6px}.stdin-label{margin:15px 0 7px}#jvm-stdin{width:100%;min-height:65px;max-height:140px;resize:vertical;border:1px solid var(--line);background:var(--editor);padding:9px;border-radius:4px;font:12px/1.6 ui-monospace,monospace}.jvm-actions{display:flex;align-items:center;gap:10px;margin-top:12px}.jvm-pending{display:flex;align-items:center;gap:8px;color:var(--accent);font-size:12px;margin:20px 0}.jvm-outcome{border-top:1px solid var(--line);padding-top:19px;margin-top:22px}.jvm-result-heading{display:flex;gap:8px;align-items:center;flex-wrap:wrap}.jvm-result-heading h3{font-size:13px}.jvm-result-heading>span{margin-left:auto;font:10px ui-monospace,monospace;color:var(--muted)}.jvm-outcome.ok .jvm-result-heading{color:var(--accent)}.jvm-outcome.failed .jvm-result-heading{color:var(--amber)}.compiler-diagnostic{padding:12px 0;border-bottom:1px solid var(--line)}.compiler-diagnostic>span{font-size:10px;color:var(--muted)}.compiler-diagnostic .text-button{font-size:11px;color:var(--amber);padding:4px 0}.compiler-diagnostic pre,.jvm-stream pre,.generated-source pre{font:11px/1.8 ui-monospace,monospace;white-space:pre-wrap;overflow-wrap:anywhere;margin:8px 0;max-height:240px;overflow:auto}.compiler-diagnostic.error pre{color:#e69a9a}.jvm-stream{padding:15px 0;border-top:1px solid var(--line)}.jvm-stream pre{padding:10px;background:var(--editor);border-left:2px solid var(--accent)}.generated-source{margin-top:18px;padding-top:14px;border-top:1px solid var(--line)}.generated-source summary{font-size:11px;color:var(--muted);cursor:pointer;padding-block:5px}.generated-source pre{max-height:200px;background:var(--editor);padding:10px}.code-line.diagnostic-line{background:#582d2d66;box-shadow:-58px 0 #582d2d66,20px 0 #582d2d66}@media(max-width:360px){.toolbar .icon-button{width:28px}.jvm-options{grid-template-columns:minmax(0,1fr)}.lab-tabs svg{display:none}}
[data-theme=light] .compiler-diagnostic.error pre{color:#9c2525}
.jvm-followup{display:flex;flex-wrap:wrap;gap:8px;margin-top:16px}.jvm-followup .secondary{white-space:normal;text-align:left}
.jvm-test-context{margin-top:13px}.jvm-test-context summary{font-size:11px;color:var(--muted);cursor:pointer;padding:7px 0}.jvm-test-context label{font-size:11px;color:var(--muted);display:block;margin:7px 0;line-height:1.6}#jvm-test-code{width:100%;min-height:90px;max-height:200px;resize:vertical;border:1px solid var(--line);background:var(--editor);padding:9px;border-radius:4px;font:12px/1.6 ui-monospace,monospace}.jvm-entry-choices{display:flex;flex-wrap:wrap;gap:8px;margin:12px 0}.jvm-entry-choices button{white-space:normal;overflow-wrap:anywhere;max-width:100%;font-family:ui-monospace,monospace}.jvm-support-note{margin-block:14px}
.jvm-source-locations{padding:14px 0;border-block:1px solid var(--line);margin:15px 0}.jvm-source-locations>div+div{margin-top:14px}.jvm-source-locations .text-button{padding:4px 0;color:var(--amber);text-align:left;overflow-wrap:anywhere;max-width:100%}.jvm-source-locations code{display:block;font:11px/1.8 ui-monospace,monospace;white-space:pre-wrap;overflow-wrap:anywhere;background:var(--editor);padding:8px;border-left:2px solid var(--amber)}.jvm-source-locations small{display:block;font:10px/1.6 ui-monospace,monospace;color:var(--muted);margin-top:5px}
.null-check,.test-var-heading label,.gui-checkbox{min-height:24px}
.run-history h3{font-size:11px;color:var(--muted);margin-top:16px}
.comparison-scroll{overflow:auto;margin-top:12px;border-block:1px solid var(--line)}
.run-comparison{width:100%;border-collapse:collapse;font:10px/1.7 ui-monospace,monospace}
.run-comparison th,.run-comparison td{padding:9px 8px;text-align:left;vertical-align:top;border-bottom:1px solid var(--line);overflow-wrap:anywhere;max-width:180px;white-space:pre-wrap}
.run-comparison thead th{font-family:inherit;color:var(--muted);font-weight:400}.run-comparison tr:last-child>*{border-bottom:0}
.run-comparison td:last-child{color:var(--accent)}
.history-row{display:flex;gap:10px;justify-content:space-between;padding:15px 0;border-bottom:1px solid var(--line);min-width:0}.history-row>div{min-width:0}.history-row strong{font-size:11px;font-weight:500}.history-row p{font-size:10px;margin:5px 0}.history-row code{font-size:10px;color:var(--accent);white-space:pre-wrap;overflow-wrap:anywhere}
.laboratory{min-width:0}
.lab-tabs{display:flex;gap:4px;margin:16px 18px 0;padding:3px;border:1px solid var(--line);border-radius:5px;background:var(--editor)}
.lab-tabs button{background:transparent;color:var(--muted);flex:1;display:flex;align-items:center;justify-content:center;gap:7px;font-size:11px;padding:9px 6px;border-radius:3px;min-width:0}
.lab-tabs button[aria-pressed=true]{background:var(--raised);color:var(--text)}
.lab-tabs svg{width:14px;height:14px}
.lab-fieldset{padding:0;margin:0;border:0;min-width:0}
.lab-fieldset:disabled{opacity:.65}
.lab-section{padding:21px 20px;border-bottom:1px solid var(--line);min-width:0}
.lab-section:last-child{border-bottom:0}
.lab-section h2{font-size:15px;line-height:1.5}
.lab-section p{font-size:12px;line-height:1.8;color:var(--muted);margin:10px 0 14px;overflow-wrap:anywhere}
.lab-section .heading-row{gap:8px;flex-wrap:wrap}
.lab-section .heading-row>span{font-size:10px}
.diagnostic{padding:13px 0 13px 12px;border-left:2px solid var(--blue);margin-top:15px}
.diagnostic.error{border-color:#ee9292}.diagnostic.warning{border-color:var(--amber)}
.diagnostic span{font-size:10px;color:var(--muted)}.diagnostic h3{font-size:12px;line-height:1.7;margin-top:5px}.diagnostic p{margin:5px 0 0}
.fix-proposal{border-top:1px solid var(--line);margin-top:18px;padding-top:18px}
.fix-proposal h3{font-size:12px}
.review-ok{display:flex;align-items:flex-start;gap:8px}.review-ok svg{color:var(--accent);width:15px;margin-top:3px}
.test-variable{padding:17px 0;border-bottom:1px solid var(--line)}
.test-var-heading{display:flex;align-items:center;justify-content:space-between;gap:6px;margin-bottom:10px}
.test-var-heading label{display:flex;align-items:center;gap:9px;min-width:0;font-size:12px}.test-var-heading code{overflow-wrap:anywhere}.test-var-heading label>span{font:10px ui-monospace,monospace;color:var(--muted)}
.laboratory input[type=checkbox]{accent-color:var(--accent);width:14px;height:14px;margin:0;flex-shrink:0}
.laboratory input:not([type=checkbox]),.laboratory select{min-width:0;border:1px solid var(--line);background:var(--editor);border-radius:4px;padding:8px 9px;font-size:12px;width:100%;height:36px}
.scalar-value{display:flex;align-items:center;gap:8px}.scalar-value>input{flex:1}
.null-check{display:flex;align-items:center;gap:4px;color:var(--muted);font:10px ui-monospace,monospace}
.test-array{display:flex;gap:9px;overflow:auto;padding-bottom:6px;align-items:center}
.test-cell{width:125px;min-width:125px}.test-cell>span{display:block;font:10px ui-monospace,monospace;color:var(--muted);margin-bottom:6px}
.test-cell .scalar-value{flex-wrap:wrap;gap:5px}.test-cell .null-check{margin-left:1px}.array-tools{display:flex;flex-direction:column;flex-shrink:0;align-self:center}.array-tools .icon-button{width:28px;height:28px}
.bool-value{display:flex;align-items:center;gap:8px;min-height:36px;font:12px ui-monospace,monospace}
.null-array{display:flex;align-items:center;gap:16px;color:var(--muted)}
.override-line{display:flex;align-items:center;flex-wrap:wrap;gap:8px;margin-top:13px;font-size:10px;color:var(--muted)}
.override-line label{display:flex;align-items:center;gap:7px}.override-line input{width:60px!important;height:29px!important;padding:3px 7px!important;font-size:11px!important}
.lab-section .test-reason{font-size:10px;margin:7px 0 0}
.add-variable{display:grid;grid-template-columns:minmax(0,1fr) 88px 32px;gap:8px;margin:16px 0}
.add-variable input,.add-variable select{font-size:11px!important}.add-variable .icon-button{height:36px}
.lab-actions{display:flex;align-items:center;flex-wrap:wrap;gap:9px;margin-top:17px}
.lab-section .lab-note{font-size:10px;line-height:1.7;margin-top:14px;margin-bottom:0}
.lab-working{display:flex;align-items:center;gap:8px;padding:11px 18px;font-size:11px;color:var(--accent);border-bottom:1px solid var(--line)}
.lab-working>.secondary{margin-left:auto;padding:6px 8px;min-height:28px;font-size:10px}
.lab-working>svg{width:14px;height:14px}
.gui-window{border:1px solid var(--line);border-radius:6px;overflow:hidden;background:var(--editor)}
.gui-title{padding:12px 14px;background:var(--raised);display:flex;align-items:center;gap:8px;border-bottom:1px solid var(--line)}
.gui-title svg{width:15px;height:15px;color:var(--blue)}.gui-title strong{font-size:12px;overflow-wrap:anywhere}.gui-title>span{margin-left:auto;color:var(--muted);font-size:9px;white-space:nowrap}
.gui-content{padding:19px 17px;display:grid;gap:17px;min-height:140px}
.gui-field>label,.gui-label>label{display:flex;justify-content:space-between;gap:10px;font-size:12px;margin-bottom:8px;overflow-wrap:anywhere}
.gui-content code{font:9px ui-monospace,monospace;color:var(--muted);overflow-wrap:anywhere}
.gui-content textarea{display:block;width:100%;min-height:85px;resize:vertical;border:1px solid var(--line);background:var(--surface);border-radius:4px;padding:9px;font-size:12px;line-height:1.8;max-height:180px}
.gui-content input:not([type=checkbox]),.gui-content select{background:var(--surface)}
.gui-content :disabled{opacity:.75;color:var(--text)}.gui-button{justify-self:start;max-width:100%;white-space:normal;text-align:left}
.gui-label output{display:block;white-space:pre-wrap;overflow-wrap:anywhere;font-size:13px;color:var(--accent);padding:11px 0}
.gui-checkbox{display:flex;align-items:center;gap:8px;font-size:12px}.gui-checkbox code{margin-left:auto}
.gui-result{margin-top:20px;padding-top:18px;border-top:1px solid var(--line)}
.scenario-tag{display:flex;align-items:center;gap:5px;font-size:10px;color:var(--amber);margin-top:9px}.scenario-tag svg{width:12px;height:12px}
.fix-dialog{width:1000px}.fix-description{padding:16px 20px;font-size:12px;line-height:1.8;color:var(--muted)}
.code-comparison{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:1px;background:var(--line);border-block:1px solid var(--line)}
.code-comparison section{min-width:0;background:var(--editor);padding:15px}.code-comparison h3{font-size:11px;color:var(--muted);margin-bottom:14px}
.code-comparison pre{font:12px/1.8 ui-monospace,monospace;overflow:auto;max-height:43dvh;margin:0;tab-size:4}
.fix-actions{display:flex;justify-content:flex-end;flex-wrap:wrap;gap:10px;padding:16px 20px;background:var(--surface);position:sticky;bottom:0}
@media(max-width:1050px){.result-tabs{gap:10px}.tab{font-size:10px}.tab svg{display:none}}
@media(max-width:760px){.result-tabs{gap:10px;padding:0 12px}.tab{font-size:10px;flex-shrink:0}.lab-section{padding:17px 15px}.lab-tabs{margin:12px 13px 0}.lab-tabs button{font-size:10px}.code-comparison{grid-template-columns:minmax(0,1fr)}.code-comparison pre{max-height:23dvh}.fix-actions .primary,.fix-actions .secondary{font-size:10px}.gui-content{padding:15px 13px}.lab-working{font-size:10px;padding-inline:13px}.lab-working .secondary{font-size:9px}}
.app-shell{grid-template-columns:minmax(0,1fr)}
.topbar,.main{min-width:0}
@media(max-width:760px) and (max-height:650px){.main .intro{display:none}.main{padding-top:12px}.trace-header p{display:none}.trace-header h2{font-size:14px}.trace-header{padding:12px 17px}.result-tabs{gap:8px;padding:0 12px}.tab{font-size:10px}}
@media(max-width:360px){.topbar{gap:6px;padding:0 10px}.top-actions{gap:2px}.top-actions .text-button{font-size:0;gap:0;width:30px}.filename .tag{display:none}.toolbar{gap:3px}.pane-heading{padding:0 12px}.filename{font-size:11px}}
@media(max-height:650px){.intro .eyebrow,.intro p{display:none}.intro h1{font-size:20px}.intro{margin-bottom:10px}}
@media(max-width:760px){
  .app-shell{height:100dvh;min-height:0;overflow:hidden;grid-template-rows:58px 1fr 45px}
  .main{padding-top:16px;min-height:0}
  .intro{margin-bottom:14px}
  .intro p{font-size:11px;max-width:none}
  h1{font-size:22px}
  .mobile-views{display:flex;gap:3px;padding:3px;background:var(--raised);border:1px solid var(--line);border-radius:6px;margin-bottom:12px;flex-shrink:0}
  .mobile-views button{flex:1;display:flex;align-items:center;justify-content:center;gap:8px;min-height:34px;background:transparent;color:var(--muted);border-radius:4px;font-size:12px}
  .mobile-views button[aria-pressed=true]{background:var(--surface);color:var(--text);box-shadow:0 1px 4px #0002}
  .mobile-views svg{width:14px;height:14px}
  .workspace{min-height:0;flex:1}
  .code-pane,.result-pane{height:100%;flex:1;min-height:0}
  .workspace[data-mobile=code] .result-pane,.workspace[data-mobile=study] .code-pane{display:none}
  .trace-header{padding:15px 17px 12px}
  .current-line,.step-explanation{padding:12px 17px}
  .state-section{padding:14px 17px}
  .trace-footer{height:24px;padding-bottom:4px}
  .range{margin-top:4px;height:14px}
  .result-footnote{padding:5px 12px;font-size:9px}
  .editor{min-height:80px}
  .footer{padding-top:8px;padding-bottom:8px}
}
@media(min-width:761px) and (max-height:850px){
  .app-shell{grid-template-rows:56px 1fr 28px}
  .main{padding-top:16px;padding-bottom:14px}
  .intro{margin-bottom:16px}
  .intro p{margin-top:5px}
  .eyebrow{margin-bottom:4px}
  .trace-header{padding:14px 20px 10px}
  .current-line{padding:12px 20px}
  .step-explanation{padding:12px 20px;font-size:12px;line-height:1.7}
  .state-section{padding:12px 20px}
  .section-label{margin-bottom:9px}
  .trace-footer{padding:0 20px 6px;height:22px}
  .range{margin:4px 0 0;height:14px}
  .trace-controls{padding:8px 16px}
  .result-footnote{padding:6px 16px}
  .context-input{padding:10px 15px}
  .context-input textarea{height:43px}
  .editor-bottom{padding:11px 15px}
  .code-layer,.code-input{line-height:24px;padding-top:16px;padding-bottom:24px}
  .code-line{height:24px}
}