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var(--accent);display:flex;align-items:center;justify-content:center;font-weight:700;font-size:13px;color:var(--accent)}.dash-chapter-num.muted{border-color:var(--pe-outline);color:var(--pe-outline)}.dash-status-pill{font-family:JetBrains Mono,monospace;font-size:10px;font-weight:700;letter-spacing:.04em;padding:4px 8px;background:var(--accent);color:var(--text-inverse)}.dash-status-pill.in_progress{background:var(--text-secondary)}.dash-status-pill.completed{background:var(--text-muted)}.dash-locked-label{display:flex;align-items:center;gap:4px;font-family:JetBrains Mono,monospace;font-size:10px;color:var(--pe-outline)}.dash-lock-icon{font-size:14px!important}.dash-chapter-title{margin:12px 0 0;font-size:18px;font-weight:600;line-height:1.35;color:var(--accent);flex:1}.dash-chapter-title.muted{color:var(--pe-outline)}.dash-chapter-progress{margin-top:12px;padding-top:8px;border-top:1px solid rgba(0,0,0,.08)}.dash-chapter-progress-head{display:flex;justify-content:space-between;margin-bottom:4px;font-family:JetBrains Mono,monospace;font-size:10px;color:var(--text-muted)}.dash-chapter-progress-head span:last-child{color:var(--accent)}.dash-bar{height:4px;background:#e2e2e5;overflow:hidden}.dash-bar-fill{height:100%;background:var(--accent);transition:width .5s ease}.dash-locked-foot{margin:12px 0 0;padding-top:8px;border-top:1px solid rgba(126,117,118,.15);font-family:JetBrains Mono,monospace;font-size:10px;color:var(--pe-outline);text-align:center}.dash-status-grid{display:grid;grid-template-columns:1fr 1fr;gap:1px;background:var(--accent);border:1px solid var(--accent)}.dash-status-cell{background:var(--pe-bg);padding:16px}.dash-status-label{font-family:JetBrains Mono,monospace;font-size:10px;color:var(--text-muted);margin-bottom:4px;text-transform:uppercase}.dash-status-value{display:flex;align-items:center;gap:8px;font-family:JetBrains Mono,monospace;font-size:13px;text-transform:uppercase;color:var(--accent)}.dash-status-dot{width:8px;height:8px;background:var(--accent);flex-shrink:0}.dash-loading{padding:40px 24px;color:var(--text-faint);font-family:JetBrains Mono,monospace}@media(min-width:768px){.ide-shell-search{display:flex}.ide-shell-actions{margin-left:0}.ide-footer-links{display:flex}.dash-chapter-grid{grid-template-columns:repeat(2,1fr)}.dash-status-grid{grid-template-columns:repeat(4,1fr)}}@media(min-width:1024px){.dash-hero-grid{grid-template-columns:2fr 1fr}.dash-chapter-grid{grid-template-columns:repeat(3,1fr)}}@media(max-width:1180px){.ide-shell{grid-template-columns:1fr;grid-template-areas:"topbar" "main" "footer"}.ide-shell-menu{display:flex}.ide-shell.ide-shell--sidebar-hidden{grid-template-columns:1fr;grid-template-areas:"topbar" "main" "footer"}.ide-shell.ide-shell--sidebar-hidden .ide-shell-sidebar{display:flex}.ide-shell-brand{font-size:14px;max-width:42vw}.ide-shell-sidebar{position:fixed;top:0;left:0;bottom:0;width:min(280px,86vw);transform:translate(-100%);transition:transform .2s ease;box-shadow:4px 0 #00000014;z-index:50}.ide-shell-sidebar.open{transform:translate(0)}.ide-footer-left{display:none}.dash-page{padding:16px 12px 32px}.dash-greeting{font-size:24px}.dash-featured-title{font-size:20px}}.app-shell:not(.ide-shell){flex:1;min-height:0;display:flex;flex-direction:column;position:relative}.topbar{height:58px;flex:0 0 58px;display:flex;align-items:center;gap:14px;padding:0 18px;background:var(--bg-subtle);border-bottom:1px solid var(--border);z-index:5}.topbar .brand{font-weight:800;color:var(--text);font-size:16px;display:flex;align-items:center;gap:10px}.topbar-logo,.drawer-logo{object-fit:contain;flex-shrink:0}.topbar .brand .dot,.drawer-brand .dot{width:28px;height:28px;border-radius:9px;background:var(--bg-inverse);display:flex;align-items:center;justify-content:center;color:var(--text-inverse);font-weight:800;font-size:12px}.topbar-title{color:var(--text-muted);font-size:14px;font-weight:600}.topbar .spacer{flex:1}.topbar-chip{color:var(--text-muted);font-size:13px}.topbar-chip b{color:var(--text)}.topbar-avatar{width:34px;height:34px;border-radius:50%;background:var(--bg-inverse);color:var(--text-inverse);font-weight:700;font-size:13px;display:flex;align-items:center;justify-content:center}.hamburger{width:40px;height:40px;border-radius:9px;border:1px solid var(--border);background:var(--bg);display:flex;flex-direction:column;align-items:center;justify-content:center;gap:4px;cursor:pointer}.hamburger:hover{border-color:var(--border-focus)}.hamburger span{width:18px;height:2px;background:var(--text);border-radius:2px}.drawer-overlay{position:absolute;top:0;right:0;bottom:0;left:0;background:#00000080;opacity:0;pointer-events:none;transition:opacity .18s;z-index:40}.drawer-overlay.show{opacity:1;pointer-events:auto}.drawer{position:absolute;top:0;left:0;bottom:0;width:264px;z-index:41;background:var(--bg-muted);border-right:1px solid var(--border);transform:translate(-100%);transition:transform .2s ease;display:flex;flex-direction:column;box-shadow:var(--shadow-md)}.drawer.open{transform:translate(0)}.drawer-brand{display:flex;align-items:center;gap:12px;padding:18px 18px 16px;border-bottom:1px solid var(--border)}.drawer-title{color:var(--text);font-weight:800;font-size:15px}.drawer-sub{color:var(--text-faint);font-size:11px}.drawer-nav{display:flex;flex-direction:column;gap:4px;padding:14px 12px;flex:1}.drawer-link{display:flex;align-items:center;gap:12px;padding:11px 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var(--border-strong);background:var(--bg-muted);color:var(--status-err-text);cursor:pointer;font-weight:600}.drawer-logout:hover{background:var(--bg-inset)}.shell-content{flex:1;min-height:0;overflow:auto}.dash-loading,.dash-hero,.section-h,.chapter-grid{max-width:1120px;margin-left:auto;margin-right:auto}.dash-loading{padding:40px 24px;color:var(--text-faint)}.dash-hero{display:flex;gap:22px;padding:28px 24px 8px;align-items:stretch}.hero-left{flex:1;min-width:0;display:flex;flex-direction:column;gap:16px}.hero-hi{font-size:24px;font-weight:800;color:var(--text)}.hero-sub{color:var(--text-muted);font-size:13px;margin-top:-8px}.continue-card{background:var(--bg-muted);border:1px solid var(--border);border-radius:16px;padding:20px 22px;cursor:pointer;display:flex;flex-direction:column;gap:10px;transition:transform .1s,border-color 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var(--border);width:34px;height:34px;border-radius:9px;display:flex;align-items:center;justify-content:center}.chapter-card .cc-title{font-size:15px;font-weight:600;color:var(--text);line-height:1.35;min-height:40px}.chapter-card .cc-foot{font-size:11px;color:var(--text-muted);margin-top:2px}.hidden{display:none!important}.ide-root{position:absolute;top:0;right:0;bottom:0;left:0;display:flex;flex-direction:column}.ide-root.ide-fullscreen{position:fixed;top:0;right:0;bottom:0;left:0;z-index:9999;background:var(--ide-bg)}.mode-toggle{display:flex;margin-left:14px;background:var(--bg-muted);border:1px solid var(--border);border-radius:8px;padding:3px;gap:2px}.mode-btn{height:26px;padding:0 12px;border:none;border-radius:6px;background:transparent;color:var(--text-muted);cursor:pointer;font-size:12px;font-weight:700}.mode-btn.active{background:var(--accent);color:var(--text-inverse)}.ide-tool-btn{height:30px;padding:0 12px;border-radius:6px;border:1px solid var(--border);background:var(--bg-muted);color:var(--text-secondary);cursor:pointer;font-size:12px;margin-left:8px}.ide-tool-btn:hover{background:var(--bg-hover);border-color:var(--border-focus)}.ide-auto-wrap{display:inline-flex;align-items:center;gap:6px;margin-left:8px;font-size:12px;color:var(--text-muted);cursor:pointer;user-select:none}.ide-auto-wrap input{accent-color:var(--accent);cursor:pointer}.ide-menu-wrap{position:relative}.ide-menu{position:absolute;top:36px;right:0;z-index:120;min-width:200px;max-width:min(360px,calc(100vw - 24px));background:var(--bg);border:1px solid var(--border);border-radius:8px;box-shadow:var(--shadow-md);overflow-x:hidden;overflow-y:auto;padding:4px}#files-menu{left:0;right:auto;min-width:240px;max-height:min(60vh,420px)}#examples-menu{min-width:280px;max-height:70vh;overflow-y:auto}#toolbar,.ide-toolbar-aux,.ide-root.ide-fullscreen #toolbar,.ide-root.ide-fullscreen .ide-toolbar-aux{overflow:visible}.ide-menu-item{padding:9px 12px;border-radius:6px;color:var(--text-secondary);font-size:13px;cursor:pointer}.ide-menu-item:hover{background:var(--bg-hover);color:var(--text)}.ide-menu-item.muted{color:var(--text-faint);cursor:default}.ide-menu-item.muted:hover{background:transparent;color:var(--text-faint)}.ide-menu-sep{padding:8px 12px 4px;font-size:10px;letter-spacing:.8px;text-transform:uppercase;color:var(--text-muted)}.ide-menu-item.file-row{display:flex;align-items:center;justify-content:space-between;gap:10px}.ide-menu-item.file-row.active{background:var(--bg-hover)}.file-row-name{flex:1;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.file-row-act{opacity:.5;font-size:12px;padding:0 4px}.file-row-act:hover,.file-row-del:hover{opacity:1;color:var(--text)}.file-name{color:var(--text-secondary);font-size:13px;font-weight:600;margin-left:10px;max-width:200px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;cursor:pointer;border-radius:5px;padding:3px 8px}.file-name:hover{background:var(--bg-hover);color:var(--text)}.modal-overlay{position:fixed;top:0;right:0;bottom:0;left:0;z-index:10000;background:#0000008c;display:flex;align-items:center;justify-content:center}.modal-card{width:360px;max-width:92vw;background:var(--bg);border:1px solid var(--border);border-radius:12px;padding:20px;box-shadow:var(--shadow-lg)}.modal-title{color:var(--text);font-size:15px;font-weight:700;margin-bottom:14px}.modal-label{display:block;font-size:12px;color:var(--text-muted);margin:12px 0 6px}.modal-label:first-of-type{margin-top:0}.muted-cell{color:var(--text-faint);font-style:italic}.modal-input{width:100%;height:40px;border-radius:8px;border:1px solid var(--border);background:var(--bg-muted);color:var(--text);padding:0 12px;font-size:14px;outline:none}.modal-input:focus{border-color:var(--border-focus)}.modal-actions{display:flex;justify-content:flex-end;gap:10px;margin-top:16px}.modal-actions .btn-sm{height:34px;padding:0 16px}.modal-actions .btn-primary{height:34px;padding:0 18px}.modal-actions .btn-primary.danger{background:var(--bg-inverse)}#workspace-stack{position:relative;flex:1;min-height:0}#workspace-stack #editor-container{position:absolute;top:0;right:0;bottom:0;left:0;overflow:hidden;background:#fff}#workspace-stack #editor-container .monaco-editor{width:100%!important;height:100%!important}#workspace-stack #editor-container .monaco-editor .cursor{background-color:#111!important;border-color:#111!important;width:2px!important}#workspace-stack #editor-container .monaco-editor .line-numbers{color:#6b6b6b!important}#workspace-stack #editor-container .monaco-editor .suggest-widget{z-index:40!important}.ide-show-board-btn{background:var(--accent)!important;color:var(--text-inverse)!important;border-color:var(--accent)!important}.ide-show-board-btn:hover{filter:brightness(1.05)}#blockly-host{position:absolute;top:0;right:0;bottom:0;left:0}#output-header{justify-content:space-between}#btn-clear-output{height:18px;padding:0 8px;border-radius:4px;border:1px solid var(--border);background:var(--bg-muted);color:var(--text-muted);cursor:pointer;font-size:10px}#btn-clear-output:hover{background:var(--bg-hover);color:var(--text)}.blocklyToolboxDiv{background:var(--bg)!important;border-right:1px solid var(--border)!important;color:var(--text)!important}.blocklyFlyoutBackground{fill:var(--bg-subtle)}.blocklyMainBackground{fill:var(--bg)!important}#toolbar{height:48px;flex:0 0 48px;background:var(--ide-toolbar);border-bottom:1px solid var(--border);display:flex;align-items:center;padding:0 12px}#app-title{font-weight:600;font-size:14px;color:var(--text)}#status-dot{width:10px;height:10px;border-radius:50%;margin-left:12px;background:var(--text-faint)}#status-dot.status-idle{background:var(--text-faint)}#status-dot.status-running,#status-dot.status-compiling{background:var(--accent);animation:pulse 1s infinite}#status-dot.status-paused{background:var(--text-muted);animation:none}#status-dot.status-stopped{background:var(--text-faint)}#status-dot.status-error{background:var(--text-secondary)}@keyframes pulse{0%{opacity:1}50%{opacity:.4}to{opacity:1}}#toolbar-spacer{flex:1}#toolbar button{height:32px;padding:0 14px;border-radius:4px;border:none;font-size:13px;cursor:pointer;margin-left:8px}#btn-run{background:var(--accent);color:var(--text-inverse);font-weight:600}#btn-run:disabled{background:var(--bg-inset);color:var(--text-faint);cursor:default}#btn-stop{background:var(--text-secondary);color:var(--text-inverse)}#btn-stop:disabled{background:var(--bg-inset);color:var(--text-faint);cursor:default}#btn-pause{background:var(--text-muted);color:var(--text-inverse)}#btn-pause:disabled{background:var(--bg-inset);color:var(--text-faint);cursor:default}#btn-reset{background:var(--bg-inset);color:var(--text-secondary)}#body{flex:1;display:flex;min-height:0}#editor-column{flex:0 0 55%;display:flex;flex-direction:column;min-height:0}#editor-tabs{flex:0 0 30px;display:flex;align-items:stretch;background:var(--bg-subtle);border-bottom:1px solid var(--border);overflow-x:auto}.ed-tab{display:flex;align-items:center;gap:6px;padding:0 10px;font-size:12px;color:var(--text-muted);border-right:1px solid var(--border);cursor:pointer;white-space:nowrap}.ed-tab.active{background:var(--ide-bg);color:var(--text);border-bottom:2px solid var(--accent)}.ed-tab-close{opacity:.6;font-size:14px}.ed-tab-close:hover{opacity:1;color:var(--text)}.ed-tab-add{padding:0 12px;display:flex;align-items:center;color:var(--text-faint);cursor:pointer;font-size:16px}.ed-tab-add:hover{color:var(--text)}#editor-container{flex:1;min-height:0}.err-line{background:#00000014}.err-gutter{background:var(--text);width:4px!important;margin-left:2px}.err-line-margin{background:#00000014}.err-glyph{background:var(--text);border-radius:50%;width:10px!important;height:10px!important;margin:5px 0 0 5px}.monaco-editor .err-line{border-left:2px solid var(--text)}.demo-line{background:#0000000f}.demo-gutter{background:var(--text);width:4px!important;margin-left:2px}.demo-glyph{background:var(--text);border-radius:50%;width:10px!important;height:10px!important;margin:5px 0 0 5px}.monaco-editor .demo-line{border-left:2px solid var(--text-muted)}#output-panel{height:150px;flex:0 0 150px;border-top:1px solid var(--border);display:flex;flex-direction:column}#output-header{height:24px;flex:0 0 24px;background:var(--ide-toolbar);padding:0 10px;display:flex;align-items:center;font-size:11px;text-transform:uppercase;letter-spacing:.5px;color:var(--text-muted)}#output-body{flex:1;overflow-y:auto;overscroll-behavior:contain;padding:6px 10px;font-family:Consolas,Menlo,monospace;font-size:12.5px;line-height:1.5;background:var(--bg);color:var(--text)}.output-line-info{color:var(--text)}.output-line-error{color:var(--text);font-weight:600}.output-line-system{color:var(--text-muted);font-style:italic}#divider{width:6px;flex:0 0 6px;background:var(--bg-inset);cursor:col-resize}#divider:hover{background:var(--accent)}#sim-column{flex:1;background:var(--ide-sim-bg);display:flex;min-height:0;min-width:0;overflow:hidden}#wb{flex:1;display:flex;flex-direction:row;min-width:0;min-height:0}#wb.wb-sim-locked 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