/* Compact learning workspace, extending AgentDIY's forest/terracotta palette. */
:root{--syntax-keyword:#c3adf2;--syntax-string:#a2d0ac;--syntax-number:#f1b990;--syntax-function:#91c9e7}
:root[data-theme=light]{--syntax-keyword:#7442a2;--syntax-string:#316842;--syntax-number:#a44c17;--syntax-function:#226784}
:root{--bg:#111815;--surface:#19211d;--surface2:#222c26;--paper:#28362d;--line:#303c34;--text:#e9ede7;--muted:#a4b1a7;--accent:#efac92;--accentText:#25180f;--warm:#efac92;--danger:#fa9993;--radius:10px}
:root[data-theme=light]{--bg:#f3f5f1;--surface:#fff;--surface2:#eef2ec;--paper:#e2e9df;--line:#d8ded5;--text:#202f25;--muted:#647365;--accent:#a6452b;--accentText:#fff;--warm:#a6452b;--danger:#b43832}
body{font-size:16px;line-height:1.65}button,input,select{font-size:14px}small{font-size:13px}.shell{display:block}.sidebar{display:none}.page{width:100%;margin:0}.topbar{height:62px;padding:0 28px;gap:24px;background:var(--surface)}.lab-brand{display:flex;align-items:center;gap:10px;white-space:nowrap;font-size:16px;font-weight:650}.lab-brand svg{width:31px;height:31px}.lab-brand small{font-size:13px;font-weight:400;color:var(--muted);margin-left:6px}.lab-nav{display:flex;align-self:stretch;gap:26px;margin-right:auto;overflow-x:auto}.lab-nav a{display:flex;align-items:center;font-size:14px;color:var(--muted);white-space:nowrap;border-bottom:2px solid transparent}.lab-nav a:hover,.lab-nav a.active{color:var(--text);border-color:var(--accent)}.top-actions{gap:14px}.text-link{font-size:14px;display:inline-block}.storage-pill{font-size:12px}.icon-button{border:0}.topbar .brand-symbol{filter:invert(1) hue-rotate(180deg)}:root[data-theme=light] .topbar .brand-symbol{filter:none}#app{max-width:1480px;padding:32px 38px 60px;min-height:calc(100vh - 115px)}footer{padding:15px 38px;font-size:12px}.eyebrow{font-size:12px;letter-spacing:1.3px;margin-bottom:10px}.button{border-radius:7px;font-size:14px;min-height:38px;padding:8px 14px}.button.small{font-size:14px}.panel{border-radius:10px}.page-title{font-size:30px}.callout,.status,.notes,.field,.cell-code,.cell-markdown,.cell-output,.file-row,.chart-label,.capability{font-size:14px}.study-heading{display:flex;justify-content:space-between;align-items:center;gap:24px;margin:8px 0 28px}.study-heading h1{font-size:32px;letter-spacing:-.7px;margin-bottom:10px;font-weight:640}.study-heading p{font-size:15px}.practice-layout{display:grid;grid-template-columns:minmax(0,1fr) 272px;gap:28px}.path-strip{display:grid;grid-template-columns:repeat(4,1fr);gap:12px;margin-bottom:26px}.path-tile{display:flex;flex-direction:column;align-items:flex-start;position:relative;padding:16px;border:1px solid var(--line);border-radius:10px;background:var(--surface);color:var(--text);text-align:left;transition:border-color .18s,transform .18s}.path-tile:hover{border-color:var(--accent);transform:translateY(-2px)}.path-tile>span{font:13px var(--mono);color:var(--accent);margin-bottom:13px}.path-tile strong{font-weight:580;font-size:15px}.path-tile small{color:var(--muted);font-size:12px;margin-top:5px}.filter-line{display:flex;gap:8px;flex-wrap:wrap;align-items:center;margin-bottom:14px}.filter-chip{background:transparent;border:0;color:var(--muted);border-radius:20px;padding:6px 12px}.filter-chip.selected{background:var(--surface2);color:var(--text)}.filter-line input,.filter-line select{background:var(--surface);border:1px solid var(--line);border-radius:7px;padding:9px 12px;color:var(--text)}.filter-line input{flex:1;min-width:180px}.problem-table-wrap{border-top:1px solid var(--line);overflow-x:auto}.problem-table{border-collapse:collapse;width:100%;text-align:left;font-size:14px}.problem-table th{font-weight:400;color:var(--muted);padding:12px 14px;font-size:13px}.problem-table td{padding:15px 14px;border-top:1px solid var(--line)}.problem-table tbody tr:nth-child(odd){background:var(--surface)}.problem-table tbody tr:hover{background:var(--surface2)}.problem-table td:first-child{width:58px}.problem-table td:nth-child(2){min-width:245px}.problem-table td:nth-child(3){width:75px}.problem-table a{display:block;font-size:15px;font-weight:520}.problem-id{font:12px var(--mono);color:var(--muted);margin-right:12px}.row-duration{display:block;color:var(--muted);font-size:12px;font-weight:400;margin:5px 0 0 42px}.lesson-status{display:inline-flex;justify-content:center;align-items:center;color:var(--muted);font-size:18px;width:25px;height:25px}.lesson-status.solved,.accepted-label,.difficulty.easy{color:#87d5ac}:root[data-theme=light] .lesson-status.solved,:root[data-theme=light] .accepted-label,:root[data-theme=light] .difficulty.easy{color:#197343}.difficulty{font-size:13px;font-weight:500}.difficulty.medium{color:#edc77c}:root[data-theme=light] .difficulty.medium{color:#866313}.topic-tags{display:flex;flex-wrap:wrap;gap:6px}.topic-tags span{font-size:12px;padding:3px 8px;border-radius:4px;background:var(--surface2);color:var(--muted)}.study-aside{display:flex;flex-direction:column;gap:18px}.progress-card,.aside-card{border:1px solid var(--line);border-radius:10px;background:var(--surface);padding:20px}.aside-caption{display:flex;justify-content:space-between;font-size:15px;font-weight:500}.aside-caption span{font-size:12px;color:var(--muted)}.progress-orbit{width:162px;height:162px;background:conic-gradient(#85bd9b var(--progress),var(--line) 0);border-radius:50%;padding:8px;margin:24px auto}.progress-orbit>div{border-radius:50%;height:100%;background:var(--surface);display:flex;align-items:center;justify-content:center;flex-direction:column}.progress-orbit strong{font-size:36px;font-weight:550;line-height:1.3}.progress-orbit small{font-size:15px;color:var(--muted)}.progress-orbit span{font-size:12px;color:var(--muted)}.progress-detail{display:flex;justify-content:space-between;font-size:13px;margin-top:10px;color:var(--muted)}.progress-detail strong{font-weight:500;color:var(--text)}.aside-card h3{font-size:16px;margin-bottom:10px}.aside-card p{font-size:14px;margin-bottom:15px}.aside-card.plain{background:transparent;border-color:transparent}.plan-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:22px}.plan-card{padding:25px;border:1px solid var(--line);background:var(--surface);border-radius:12px}.plan-top{display:flex;justify-content:space-between;align-items:center;font-size:13px}.phase-index{color:var(--accent);font:22px var(--mono)}.plan-card h2{font-size:24px;margin:18px 0 7px}.plan-card p{font-size:15px}.plan-card progress{width:100%;height:5px;accent-color:var(--accent);margin:20px 0 6px}.plan-lessons{margin-bottom:20px}.plan-lessons a{display:flex;align-items:center;gap:16px;padding:16px 0;border-bottom:1px solid var(--line);font-size:15px}.plan-lessons a>span:nth-child(2){flex:1}.plan-lessons small{display:block;font-size:12px;color:var(--muted);margin-top:4px}.plan-lessons .lesson-status{font:14px var(--mono)}.study-note{color:var(--muted);font-size:13px;padding:18px 0;line-height:1.9}.bench-toolbar{height:54px;display:flex;align-items:center;justify-content:space-between;gap:12px;padding:0 16px}.bench-location{display:flex;align-items:center;gap:16px;font-size:13px}.bench-location>a:not(.problem-back){font-size:26px;line-height:1}.problem-back{font-size:14px}.toolbar-divider{height:20px;border-left:1px solid var(--line)}.run-actions{display:flex;gap:8px;align-items:center}.kernel-state{font-size:12px;color:var(--muted);margin-right:12px}.run-actions .button{min-height:33px;padding:5px 14px}#app.is-workbench{padding:0 10px 10px;max-width:none;height:calc(100vh - 62px);min-height:600px}.is-workbench~footer{display:none}.workbench{display:grid;grid-template-columns:minmax(340px,43%) 8px minmax(0,1fr);height:calc(100% - 54px)}.reading-pane,.editor-card,.console-card{background:var(--surface);border:1px solid var(--line);border-radius:9px;overflow:hidden;min-width:0}.reading-pane{display:flex;flex-direction:column}.pane-tabs{display:flex;background:var(--surface2);padding:0 12px;gap:16px;min-height:44px;border-bottom:1px solid var(--line)}.pane-tabs button{white-space:nowrap;border:0;background:transparent;color:var(--muted);padding:10px 0;font-size:14px;border-bottom:2px solid transparent}.pane-tabs button[aria-selected=true]{color:var(--text);border-color:var(--accent)}.pane-tabs button span{font-size:12px;margin-left:4px}.reading-content{overflow:auto;padding:25px 26px 40px;scrollbar-width:thin;scrollbar-color:var(--line) transparent}.problem-heading h1{font-size:25px;line-height:1.45;letter-spacing:-.5px;margin-bottom:14px}.problem-heading .eyebrow{font-size:12px}.problem-meta{display:flex;gap:16px;font-size:13px;color:var(--muted);margin-bottom:24px}.lesson-intro{font-size:16px;line-height:1.9;color:var(--text)}.lesson-steps{display:flex;gap:6px;margin:23px 0 0}.lesson-steps button{border:0;border-bottom:2px solid var(--line);background:transparent;color:var(--muted);padding:8px;flex:1;text-align:left;font:13px var(--mono)}.lesson-steps span{display:block;font:12px/1.5 sans-serif;margin-top:6px}.lesson-steps button.selected{color:var(--accent);border-color:var(--accent)}.concept-copy{padding:24px 0}.section-number{font-size:12px;color:var(--muted)}.concept-copy h2{font-size:20px;margin:7px 0 12px}.concept-copy p{font-size:16px;line-height:1.95;color:var(--text)}.quiet-button{border:0;background:transparent;color:var(--muted);font-size:13px;padding:4px 7px}.quiet-button:hover{color:var(--text)}.concept-copy .quiet-button{color:var(--accent);margin-top:16px;padding-left:0}.explorer,.prediction{border:1px solid var(--line);background:var(--bg);border-radius:10px;padding:18px;margin:5px 0 24px}.block-heading{display:flex;align-items:center;gap:9px;font-size:14px;margin-bottom:15px}.block-heading .accepted-label{font-size:12px;margin-left:auto}.mini-icon{color:var(--accent);font-size:18px}.data-bars{display:flex;justify-content:center;align-items:flex-end;gap:14px;height:126px;padding:10px 0;margin:8px 0 14px}.data-column{flex:1;min-width:0;max-width:62px;text-align:center;font:12px var(--mono)}.bar-track{height:65px;display:flex;align-items:flex-end;justify-content:center}.data-bar{display:block;min-width:8px;width:70%;background:#86bb9d;border-radius:4px 4px 0 0;transition:height .15s}.data-bar.negative{background:var(--accent)}.data-column strong{display:block;font-size:12px;font-weight:500;margin-top:5px}.data-column small{display:block;font-size:11px;color:var(--muted);overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.experiment-result{font:16px var(--mono);color:var(--accent);text-align:center;padding:8px 0 14px}.explorer p{font-size:14px}.slider-label{display:flex;justify-content:space-between;font-size:13px;margin:19px 0 8px;color:var(--muted)}.slider-label output{color:var(--text);font-family:var(--mono)}.explorer input[type=range]{width:100%;accent-color:var(--accent);cursor:pointer}.prediction>p{font-size:15px;color:var(--text)}.quiz-options{display:flex;flex-direction:column;gap:8px;margin-top:15px}.quiz-options button{text-align:left;padding:10px 12px;border:1px solid var(--line);background:var(--surface);color:var(--text);border-radius:7px;font-size:14px}.quiz-options button span{display:inline-block;color:var(--muted);width:28px;font-family:var(--mono)}.quiz-options button.correct{border-color:#87b89b;background:#66857522}.quiz-options button.incorrect{border-color:var(--danger)}.quiz-feedback{font-size:14px!important;margin-top:14px;line-height:1.8}.correct{color:#87d5ac!important}.incorrect,.failed-label{color:var(--danger)!important}:root[data-theme=light] .correct{color:#197343!important}.lesson-next p{font-size:14px;margin-bottom:13px}.problem-description p{font-size:16px;color:var(--text);line-height:1.95}.problem-description h3{margin:26px 0 12px;font-size:17px}.example{background:var(--bg);border-left:3px solid var(--line);padding:14px 16px;margin:14px 0}.example strong{font-size:14px}.example pre,.hint pre{white-space:pre-wrap;overflow-wrap:anywhere;font:14px/1.8 var(--mono);margin:9px 0 0}.example pre span{color:var(--muted)}.hint{border-bottom:1px solid var(--line);padding:12px 0;font-size:14px}.hint 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var(--line)}.console-card{display:flex;flex-direction:column}.console-head>span{font-size:12px;color:var(--muted)}.test-results{padding:20px;overflow:auto;min-height:0;scrollbar-width:thin}.console-empty{text-align:center;padding:12px}.console-empty>span{font-size:27px;color:var(--muted)}.console-empty h3{font-size:15px;font-weight:500;margin:7px 0}.console-empty p{font-size:13px;margin:6px 0}.verdict{font-size:19px;font-weight:600;margin-bottom:17px}.verdict span{display:block;font-size:12px;font-weight:400;color:var(--muted);margin-top:4px}.case-tabs{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:18px}.case-tabs button{border:1px solid transparent;background:var(--surface2);padding:5px 11px;font-size:12px;border-radius:5px}.case-tabs button.pass{color:#86c7a3}.case-tabs button.fail{color:var(--danger)}.case-tabs button.selected{border-color:var(--muted)}#case-detail dl{margin:0;font-size:13px}#case-detail dt{color:var(--muted);margin-top:10px}#case-detail dd{margin:6px 0 0;padding:10px;background:var(--bg);border-radius:5px}#case-detail pre,#case-detail code{white-space:pre-wrap;word-break:break-word;font:13px/1.65 var(--mono);margin:0;padding:0;background:transparent}.next-challenge{display:flex;align-items:center;justify-content:space-between;gap:15px;font-size:13px;margin-top:20px;padding-top:14px;border-top:1px solid var(--line)}.next-challenge a{white-space:nowrap}.running-state,.run-error{text-align:center;padding:25px 12px}.running-state strong{display:block;font-size:15px}.running-state p,.run-error p{font-size:14px;margin-top:10px}.run-error h3{font-size:16px;color:var(--danger)}.spinner{display:inline-block;width:22px;height:22px;border:2px solid var(--line);border-top-color:var(--accent);border-radius:50%;animation:spin .8s linear infinite;margin-bottom:12px}@keyframes spin{to{transform:rotate(360deg)}}.attempt-list article{border-bottom:1px solid var(--line);padding:20px 0;font-size:14px}.attempt-list p{font-size:13px;margin:6px 0}.attempt-list pre{font:13px/1.7 var(--mono);background:var(--bg);padding:12px;white-space:pre-wrap;overflow-wrap:anywhere}.attempt-list summary{cursor:pointer;color:var(--muted);margin:12px 0}.resource-copy{margin:14px 0;font-size:15px}.resource-link{display:flex;align-items:center;gap:14px;border:1px solid var(--line);padding:16px;border-radius:8px;margin-bottom:16px;font-size:14px}.resource-link>span{color:var(--accent)}.resource-link strong{font-weight:500;flex:1}.resource-link small{display:block;color:var(--muted);font-size:12px;margin-top:5px}.resource-link+h3{margin-top:30px}#save-reflection{margin-top:12px}[hidden]{display:none!important}
@media(min-width:1700px){.reading-content{padding:30px 40px}.workbench{grid-template-columns:minmax(400px,42%) 8px minmax(0,1fr)}}
@media(max-width:1120px){.lab-brand small,.storage-pill{display:none}.lab-nav{gap:20px}.topbar{padding:0 18px;gap:18px}.practice-layout{grid-template-columns:minmax(0,1fr) 230px;gap:20px}.topic-tags{display:none}.problem-table th:last-child,.problem-table td:last-child{display:none}.path-tile{padding:12px}.path-tile strong{font-size:14px}.reading-content{padding:20px}.pane-tabs{gap:13px}.pane-tabs button{font-size:13px}.kernel-state{display:none}.workbench{grid-template-columns:minmax(310px,45%) 8px minmax(0,1fr)}.lesson-steps span{display:none}}
@media(max-width:800px){.topbar{flex-wrap:wrap;height:auto;min-height:60px;padding:12px 16px 0;gap:5px 16px}.lab-brand{font-size:15px}.top-actions{margin-left:auto}.top-actions .text-link{font-size:12px}.lab-nav{order:3;flex-basis:100%;height:42px;gap:28px}.lab-nav a{font-size:14px}#app{padding:25px 18px 40px}.study-heading{align-items:flex-start;gap:15px}.study-heading h1{font-size:27px}.study-heading p{font-size:14px}.study-heading>.button{white-space:nowrap}.practice-layout{grid-template-columns:1fr}.study-aside{display:grid;grid-template-columns:1fr 1fr}.study-aside .plain{display:none}.progress-orbit{width:125px;height:125px;margin:18px auto}.plan-grid{grid-template-columns:1fr}.path-strip{gap:8px}.path-tile strong{font-size:13px}.path-tile small{font-size:11px}#app.is-workbench{height:auto;min-height:0;padding:0 8px 12px}.bench-toolbar{height:auto;min-height:90px;flex-wrap:wrap;padding:10px 5px;gap:10px}.run-actions{width:100%;justify-content:flex-end}.bench-location{width:100%;justify-content:flex-start}.workbench{display:flex;flex-direction:column;height:auto;gap:10px}.bench-divider{display:none}.reading-pane{max-height:65vh;min-height:360px}.reading-content{padding:22px}.coding-pane{display:flex;flex-direction:column;gap:10px}.editor-card{height:420px}.console-card{min-height:250px;max-height:500px}.pane-tabs{gap:20px}.lesson-steps span{display:block}.test-results{padding:16px}.language-bar{font-size:12px}.lab-nav{scrollbar-width:none}}
@media(max-width:500px){.study-heading{flex-direction:column}.study-heading>.button{align-self:flex-start}.path-strip{grid-template-columns:repeat(2,1fr)}.path-tile{padding:15px}.path-tile>span{margin-bottom:7px}.study-aside{grid-template-columns:1fr}.study-aside .aside-card{display:none}.filter-chip{padding:6px 9px;font-size:13px}.filter-line select{flex:1;min-width:0}.filter-line input{flex-basis:100%}.problem-table td,.problem-table th{padding:13px 9px}.problem-table td:first-child{width:35px}.problem-table td:nth-child(2){min-width:200px}.problem-table a{font-size:14px}.problem-id{display:block;font-size:11px;margin-bottom:3px}.row-duration{margin-left:0;font-size:11px}.lesson-steps span{display:none}.pane-tabs{gap:17px}.pane-tabs button{font-size:13px}.reading-content{padding:20px 17px}.problem-heading h1{font-size:23px}.next-challenge{flex-wrap:wrap}.lesson-intro,.concept-copy p,.problem-description p{font-size:16px}.data-bars{gap:8px}.lab-nav{gap:24px}}
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