:root{color-scheme:light;--on-accent: #ffffff;--on-green: #ffffff;--on-red: #ffffff;--selection: #cdd3ff;--row-alt: #fafbfe;--header: rgba(255, 255, 255, .92);--frame: #edeff6;--ink: #282e3e;--ink-2: #2e3856;--muted: #586380;--faint: #939bb4;--accent: #4255ff;--accent-hover: #3546d3;--accent-deep: #2a38b8;--accent-ring: rgba(66, 85, 255, .16);--canvas: #f6f7fb;--paper: #ffffff;--tint: #edefff;--border: #d9dde8;--border-strong: #b9c0d4;--pastel-violet: #dbdfff;--pastel-violet-ink: #3a45d1;--pastel-cyan: #d0f0f2;--pastel-cyan-ink: #0b6570;--pastel-magenta: #fbe3f3;--pastel-magenta-ink: #a11a72;--pastel-peach: #ffe8d9;--pastel-peach-ink: #97430c;--green: #0f7343;--green-hover: #0c5f37;--green-bg: #e2f5ea;--red: #cf2140;--red-hover: #b01830;--red-bg: #fdecef;--amber-bg: #fbf4dd;--amber-border: #e3cd8a;--console: #262c42;--console-raised: #333b58;--console-text: #edf0fb;--console-dim: #a3adcc;--console-error: #ff9eb3;--console-blue: #92a7ff;--console-amber: #ffc466;--console-green: 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var(--border)}.btn-outline:hover:not(:disabled){border-color:var(--border-strong);background:var(--canvas)}.btn-outline[aria-pressed=true]{border-color:var(--accent);color:var(--accent-deep);background:var(--tint)}.btn-ghost{background:none;color:var(--accent);padding:8px 12px;min-height:36px;border-radius:var(--radius-ctl)}.btn-ghost:hover:not(:disabled){color:var(--accent-hover);background:var(--tint)}.btn-big{font-size:16px;padding:13px 28px;min-height:52px}.btn-small{font-size:13.5px;padding:6px 13px;min-height:33px;gap:6px}.input{width:100%;border:1px solid var(--border);border-radius:var(--radius-ctl);padding:11px 14px;font-size:15.5px;font-weight:400;color:var(--ink);background:var(--paper);transition:border-color var(--t-fast) var(--ease-out),box-shadow var(--t-fast) var(--ease-out)}.input:hover:not(:focus){border-color:var(--border-strong)}.input:focus{border-color:var(--accent);box-shadow:0 0 0 3px var(--accent-ring);outline:none}.input::placeholder{color:var(--faint);font-weight:400;opacity:1}.label{display:block;font-size:12px;font-weight:600;color:var(--muted);text-transform:uppercase;letter-spacing:.06em;margin:0 0 6px 2px}.kicker{font-size:12.5px;font-weight:700;color:var(--accent);text-transform:uppercase;letter-spacing:.09em}.error-box{background:var(--red-bg);border:1px solid rgba(207,33,64,.3);color:var(--red);border-radius:var(--radius-card);padding:11px 16px;font-size:14.5px;font-weight:500;line-height:1.45}.error-box-goto{display:inline-block;margin-left:10px;min-height:24px;border:none;background:none;padding:0;cursor:pointer;font:inherit;font-size:13px;color:inherit;text-decoration:underline;text-underline-offset:2px}.error-box-goto:hover{opacity:.8}.success-box{background:var(--green-bg);border:1px solid rgba(18,130,76,.3);color:var(--green);border-radius:var(--radius-card);padding:11px 16px;font-size:14.5px;font-weight:500}.overlay{position:fixed;top:0;right:0;bottom:0;left:0;z-index:60;background:#282e3e6b;-webkit-backdrop-filter:blur(3px);backdrop-filter:blur(3px);animation:fadeIn .2s var(--ease-out)}.modal-wrap{position:fixed;top:0;right:0;bottom:0;left:0;z-index:61;display:flex;align-items:center;justify-content:center;padding:24px;pointer-events:none}.modal{pointer-events:auto;width:min(560px,100%);max-height:88vh;overflow-y:auto;background:var(--paper);border-radius:var(--radius-lg);padding:28px;animation:popIn .28s var(--ease-spring);box-shadow:var(--shadow-lg);border:1px solid var(--border)}.modal-wide{width:min(920px,100%)}.spinner{width:18px;height:18px;border-radius:50%;border:2.5px solid var(--accent-ring);border-top-color:var(--accent);animation:spin .7s linear infinite;flex:none}.hover-lift{transition:box-shadow var(--t-med) var(--ease-out),transform var(--t-med) var(--ease-out),border-color var(--t-med) var(--ease-out)}.hover-lift:hover{box-shadow:var(--shadow-md);transform:translateY(-2px);border-color:var(--border-strong)}.badge{font-size:12px;font-weight:600;letter-spacing:.02em;background:var(--canvas);color:var(--muted);border:1px solid var(--border);border-radius:var(--radius-pill);padding:3px 10px;white-space:nowrap;display:inline-flex;align-items:center;gap:5px}.badge.python{background:var(--pastel-violet);color:var(--pastel-violet-ink);border-color:transparent}.badge.sql{background:var(--pastel-cyan);color:var(--pastel-cyan-ink);border-color:transparent}.badge.ai{background:var(--pastel-magenta);color:var(--pastel-magenta-ink);border-color:transparent}.badge.peach{background:var(--pastel-peach);color:var(--pastel-peach-ink);border-color:transparent}.glyph-tile{width:42px;height:42px;flex:none;display:inline-flex;align-items:center;justify-content:center;border-radius:var(--radius-card);background:var(--pastel-violet);color:var(--pastel-violet-ink)}.glyph-tile.sql{background:var(--pastel-cyan);color:var(--pastel-cyan-ink)}.glyph-tile.ai{background:var(--pastel-magenta);color:var(--pastel-magenta-ink)}.glyph-tile.peach{background:var(--pastel-peach);color:var(--pastel-peach-ink)}.glyph-tile svg{display:block}.feature-chip{width:42px;height:42px;flex:none;display:inline-flex;align-items:center;justify-content:center;border-radius:var(--radius-card);background:var(--pastel-violet);color:var(--pastel-violet-ink)}.feature-chip.cyan{background:var(--pastel-cyan);color:var(--pastel-cyan-ink)}.feature-chip.magenta{background:var(--pastel-magenta);color:var(--pastel-magenta-ink)}.feature-chip.peach{background:var(--pastel-peach);color:var(--pastel-peach-ink)}.feature-chip.green{background:var(--green-bg);color:var(--green)}.workspace{display:grid;grid-template-columns:1fr;gap:16px;align-items:stretch}@media(min-width:900px){.workspace:not(.stacked){grid-template-columns:minmax(260px,var(--wsplit, calc(50% - 7px) )) 14px minmax(260px,1fr);gap:0}.workspace:not(.stacked)>.ws-splitter{display:flex;cursor:col-resize}}.ws-splitter{display:none;align-items:center;justify-content:center;touch-action:none;-webkit-user-select:none;user-select:none;border-radius:6px;transition:background var(--t-fast) var(--ease-out)}.ws-splitter:before{content:"";border-radius:var(--radius-pill);background:var(--muted);opacity:.55;transition:background var(--t-fast) var(--ease-out),opacity var(--t-fast) var(--ease-out)}.workspace:not(.stacked)>.ws-splitter:before{width:4px;height:46px}.workspace.stacked>.ws-splitter:before{height:4px;width:46px}.ws-splitter:hover{background:var(--tint)}.ws-splitter:hover:before,.ws-splitter:focus-visible:before{background:var(--accent);opacity:1}.pane{background:var(--paper);border-radius:var(--radius-card);border:1px solid var(--border);box-shadow:var(--shadow-sm);display:flex;flex-direction:column;min-height:200px;overflow:hidden}.pane-head{display:flex;align-items:center;gap:8px;padding:8px 12px;border-bottom:1px solid var(--border);background:var(--paper);flex-wrap:wrap}.file-tabs{display:flex;gap:4px;flex-wrap:wrap;align-items:center}.file-tab{border:1px solid transparent;background:none;border-radius:var(--radius-ctl);padding:6px 12px;font-size:13px;font-weight:500;font-family:var(--font-code);color:var(--muted);cursor:pointer;transition:background var(--t-fast) var(--ease-out),color var(--t-fast) var(--ease-out),border-color var(--t-fast) var(--ease-out)}.file-tab:hover{color:var(--ink);background:var(--canvas)}.file-tab[aria-selected=true]{background:var(--tint);color:var(--accent-deep);border-color:#4255ff40;font-weight:600}.editor-host{flex:1;min-height:280px;display:flex;flex-direction:column}.editor-host{font-size:15px}.editor-host .cm-editor{flex:1;min-height:0;font-size:inherit}.editor-host .cm-scroller{font-family:var(--font-code);line-height:1.55}.editor-host .cm-gutters{background:var(--row-alt);color:var(--muted);border-right:1px solid var(--border)}.editor-host .cm-activeLine{background:#4255ff0d}.editor-host .cm-activeLineGutter{background:#4255ff17}.editor-shell{position:relative;flex:1;display:flex;flex-direction:column;min-width:0;min-height:0}.sel-popup{position:absolute;z-index:30;max-width:min(430px,calc(100% - 16px))}.sel-popup.above{transform:translateY(-100%)}.sel-popup-card{background:var(--paper);border:1px solid var(--border);border-radius:var(--radius-card);box-shadow:var(--shadow-lg);overflow:hidden;animation:popIn .18s var(--ease-out)}.sel-popup-row{display:flex;align-items:center;gap:2px;padding:4px;flex-wrap:wrap}.sel-popup-row .btn-small{min-height:30px;padding:5px 10px;font-size:13px;white-space:nowrap}.sel-popup-close{color:var(--muted);margin-left:auto}.sel-popup-close:hover:not(:disabled){color:var(--ink);background:var(--canvas)}.sel-popup-result{border-top:1px solid var(--border);background:var(--tint);padding:10px 13px;font-size:13.5px;line-height:1.55;color:var(--ink);max-height:220px;overflow-y:auto;animation:fadeIn .2s var(--ease-out)}.sel-popup-loading{display:inline-flex;align-items:center;gap:8px;color:var(--muted);font-weight:500}.sel-popup-error{color:var(--red);font-weight:500}.sel-popup-def{display:flex;flex-direction:column;gap:2px;margin:0;padding:8px 11px 6px;border-bottom:1px solid var(--border);font-size:12.5px;line-height:1.5;color:var(--ink-2)}.sel-popup-def strong{font-family:var(--font-code);font-size:12px;color:var(--accent-deep)}.editor-shell.dark .cm-gutters{background:#1d2337;color:#8a94b8;border-right:1px solid #333b58}.editor-shell.dark .cm-activeLine{background:#92a7ff14}.editor-shell.dark .cm-activeLineGutter{background:#2b3352;color:#cdd3ff}.editor-shell.dark .cm-step-line{background:#92a7ff29!important;box-shadow:inset 3px 0 0 var(--console-blue)}.editor-statusbar{display:flex;align-items:center;gap:10px;padding:6px 12px;border-top:1px solid var(--border);background:var(--paper);flex-wrap:wrap;min-height:42px}.cursor-pos{font-family:var(--font-code);font-size:12px;font-weight:500;color:var(--muted);white-space:nowrap;min-width:84px}.statusbar-hint{font-size:12.5px;color:var(--muted);line-height:1.4;min-width:0;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.statusbar-hint kbd,.output-empty kbd{font-family:var(--font-code);font-size:11px;background:var(--canvas);border:1px solid var(--border);border-bottom-width:2px;border-radius:5px;padding:1px 5px}.stepper{display:inline-flex;align-items:center;border:1px solid var(--border);border-radius:var(--radius-ctl);background:var(--paper);overflow:hidden;flex:none}.stepper button{border:none;background:none;padding:5px 11px;min-height:30px;cursor:pointer;color:var(--ink-2);font-size:13px;font-weight:600;transition:background var(--t-fast) var(--ease-out),color var(--t-fast) var(--ease-out)}.stepper button:hover{background:var(--tint);color:var(--accent-deep)}.stepper button:focus-visible{outline-offset:-3px}.stepper-value{font-family:var(--font-code);font-size:12px;color:var(--muted);min-width:46px;text-align:center;border-inline:1px solid var(--border);padding:5px 4px;align-self:stretch;display:inline-flex;align-items:center;justify-content:center}@media(any-pointer:coarse){.stepper button{min-height:36px;min-width:40px}.editor-statusbar .btn-small,.sel-popup-row .btn-small,.touch-actions .btn-small,.file-tab{min-height:36px}}.popover-wrap{position:relative;flex:none}.popover{position:absolute;bottom:calc(100% + 8px);right:0;z-index:40;width:230px;background:var(--paper);border:1px solid var(--border);border-radius:var(--radius-card);box-shadow:var(--shadow-lg);padding:12px 14px;animation:popIn .18s var(--ease-out);display:flex;flex-direction:column;gap:10px}.popover-title{margin:0;font-size:11.5px;font-weight:600;color:var(--muted);text-transform:uppercase;letter-spacing:.06em}.popover-note{margin:2px 0 0;font-size:12px;color:var(--muted);line-height:1.45}.switch{display:flex;align-items:center;gap:10px;font-size:14px;font-weight:500;color:var(--ink);cursor:pointer;-webkit-user-select:none;user-select:none}.switch input{position:absolute;width:1px;height:1px;opacity:0}.switch-track{width:36px;height:21px;flex:none;border-radius:var(--radius-pill);background:var(--border);border:1px solid var(--border-strong);position:relative;transition:background var(--t-med) var(--ease-out),border-color var(--t-med) var(--ease-out)}.switch-knob{position:absolute;top:2px;left:2px;width:15px;height:15px;border-radius:50%;background:var(--paper);box-shadow:var(--shadow-sm);transition:transform var(--t-med) var(--ease-spring)}.switch input:checked+.switch-track{background:var(--accent);border-color:var(--accent)}.switch input:checked+.switch-track .switch-knob{transform:translate(15px)}.switch input:focus-visible+.switch-track{outline:3px solid var(--accent);outline-offset:2px}.switch:hover .switch-track{border-color:var(--accent)}.file-controls{display:flex;flex-wrap:wrap;align-items:center;gap:2px;margin-left:auto}.file-tab{min-width:0;max-width:100%}.file-tab-name{max-width:200px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.output-state{font-size:11px;line-height:1.5;font-weight:600;padding:3px 8px;border-radius:var(--radius-pill);color:var(--muted);background:var(--canvas)}.output-state.ok{color:var(--green);background:var(--green-bg)}.output-state.error{color:var(--red);background:var(--red-bg)}.output-state.stale{color:var(--pastel-peach-ink);background:var(--pastel-peach)}.output-state.running{color:var(--accent-deep);background:var(--tint)}.data-view-bar{display:flex;justify-content:space-between;align-items:center;gap:8px;flex-wrap:wrap;padding:8px 12px;background:var(--canvas);border-bottom:1px solid var(--border)}.file-view-label{display:inline-flex;align-items:center;gap:6px;font-size:12px;color:var(--muted)}.view-switch{display:inline-flex;padding:3px;gap:2px;background:var(--paper);border:1px solid var(--border);border-radius:8px}.view-switch button{display:inline-flex;align-items:center;gap:6px;border:0;border-radius:5px;padding:6px 10px;background:transparent;color:var(--muted);font-size:12px;font-weight:600;cursor:pointer}.view-switch button[aria-pressed=true]{color:var(--accent-deep);background:var(--tint)}.view-switch button:hover{color:var(--accent-deep)}.data-preview{display:flex;flex-direction:column;min-height:0;flex:1}.data-preview-summary{display:flex;flex-wrap:wrap;gap:8px 16px;justify-content:space-between;padding:12px 14px;font-size:12px;color:var(--muted)}.data-preview-summary p{margin:0}.data-preview-summary label{display:inline-flex;align-items:center;gap:6px;cursor:pointer}.data-preview-scroll{overflow:auto;flex:1;min-height:100px;max-height:500px;border-block:1px solid var(--border)}.data-preview-table{width:100%;border-collapse:separate;border-spacing:0;font-size:13px}.data-preview-table th,.data-preview-table td{text-align:left;vertical-align:top;padding:10px 14px;border-bottom:1px solid var(--border);border-right:1px solid var(--border);min-width:100px;max-width:320px;overflow-wrap:anywhere;white-space:pre-wrap}.data-preview-table thead th{position:sticky;top:0;background:var(--tint);color:var(--accent-deep);font-weight:600;z-index:1}.data-column-label{display:block;max-width:280px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.data-preview-table tbody tr:nth-child(2n){background:var(--canvas)}.data-preview-table tbody tr:hover{background:var(--tint)}.data-preview-table 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2px;border:0;background:var(--paper);color:var(--ink-2);font:inherit;font-size:12px;cursor:pointer}.theme-select:focus-within{outline:2px solid var(--accent);outline-offset:2px}.theme-select select:focus-visible{outline:none}.site-header .theme-select{margin-left:10px}.appearance-settings{display:flex;align-items:center;justify-content:space-between;gap:14px;padding:14px;border:1px solid var(--border);border-radius:10px;background:var(--canvas)}.appearance-settings strong{font-size:14px}.appearance-settings .surface-note{margin-top:4px;font-size:12px}.btn-primary,.btn-primary:hover,.console-jump,.console-jump:hover{color:var(--on-accent)}.btn-run,.btn-run:hover{color:var(--on-green)}.btn-danger,.btn-danger:hover{color:var(--on-red)}.turtle-pad-btn:active{color:var(--on-accent)}.dirty-dot{background:var(--on-accent)}.skip-link,.skip-link:focus{background:var(--accent);color:var(--on-accent)}:root[data-theme=dark] .btn-run .spinner{border-color:#10251a4d;border-top-color:var(--on-green)}:root[data-theme=dark] .file-tab[aria-selected=true],:root[data-theme=dark] .quiz-chip,:root[data-theme=dark] .quiz-why,:root[data-theme=dark] .explain-text{border-color:var(--border-strong)}:root[data-theme=dark] .error-box,:root[data-theme=dark] .error-strip{border-color:#8d5362}:root[data-theme=dark] .success-box{border-color:#47775c}:root[data-theme=dark] .overlay{background:#040912ad}:root[data-theme=dark] .figure-card{background:var(--paper)}:root[data-theme=dark] .editor-shell.dark .cm-editor{background:var(--console)}:root[data-theme=dark] .cm-search input,:root[data-theme=dark] .cm-search button{color:var(--ink);background:var(--paper);border:1px solid var(--border-strong);border-radius:4px}:root[data-theme=dark] .cm-search button:hover{background:var(--tint)}:root[data-theme=dark] .cm-tooltip-lint{color:var(--ink)}.pane{border-color:var(--border)}.output-head{min-height:45px}.step-card .step-h{font-weight:600;color:var(--ink-2)}.console-toolbar{padding:6px 2px 10px}.settings-toggles label{display:flex;align-items:center;gap:5px;line-height:1.5}.settings-toggles input{flex:none;width:16px;height:16px}.settings-toggles label:has(input:disabled){color:var(--muted)}@media(max-width:600px){.appearance-settings{align-items:flex-start;flex-wrap:wrap}.site-header .theme-select{margin-left:4px}.theme-select{padding:2px 6px}}@media(prefers-contrast:more){:root[data-theme=dark]{--muted: #e9edf6;--ink-2: #e9edf6;--border: #8496b5;--border-strong: #a4b1c8;--faint: #a4b1c8}}:root[data-theme=dark] .input:not([aria-invalid=true]){border-color:var(--border-strong)}:root[data-theme=dark] .input:focus{border-color:var(--accent)}:root[data-theme=dark] .input[aria-invalid=true]{border-color:var(--red)}.editor-tools{position:relative;display:flex;flex-wrap:wrap;align-items:center;gap:4px 12px;padding:5px 8px;border-bottom:1px solid var(--border);background:var(--canvas);flex:none;font-family:var(--font-body)}.editor-tool-buttons{display:flex;gap:2px;align-items:center;flex:none}.editor-tool{display:inline-flex;align-items:center;justify-content:center;gap:5px;min-height:30px;padding:5px 7px;border:1px solid transparent;border-radius:5px;background:transparent;color:var(--ink-2);font:inherit;font-size:12px;font-weight:500;cursor:pointer}.editor-tool:hover:not(:disabled),.editor-more[open]>summary{background:var(--tint);color:var(--accent-deep);border-color:var(--border)}.editor-tool:disabled{opacity:.45;cursor:default}.editor-more>summary{list-style:none}.editor-more>summary::-webkit-details-marker{display:none}.editor-tools-menu{position:absolute;right:8px;top:calc(100% - 2px);width:290px;max-width:calc(100% - 16px);padding:6px;border:1px solid var(--border-strong);border-radius:9px;box-shadow:var(--shadow-lg);background:var(--paper);color:var(--ink);z-index:45}.editor-tools-menu button{display:flex;align-items:center;justify-content:space-between;gap:10px;width:100%;border:0;border-radius:5px;padding:9px 8px;background:transparent;color:var(--ink-2);text-align:left;font:inherit;font-size:12px;cursor:pointer}.editor-tools-menu button:hover,.editor-tools-menu button:focus-visible{background:var(--tint);color:var(--accent-deep)}.editor-tools-menu kbd{flex:none;font-size:10px}.editor-tools-menu p{margin:4px 8px;padding-top:8px;border-top:1px solid var(--border);color:var(--muted);font-size:11px;line-height:1.6}.editor-run-target{min-width:0;max-width:100%;margin-left:auto;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;color:var(--muted);font-size:11px}.editor-run-target strong{font-weight:500}.editor-run-target button{display:inline-flex;gap:5px;align-items:center;max-width:100%;border:0;border-radius:4px;padding:3px;color:var(--accent-deep);background:transparent;font:inherit;cursor:pointer}.editor-run-target button:hover{text-decoration:underline}.cm-panel.cm-dialog{padding:10px;background:var(--canvas);color:var(--ink);font:13px var(--font-body);border-top:1px solid var(--border)}.cm-panel.cm-dialog input,.cm-panel.cm-dialog button{max-width:100%;border:1px solid var(--border-strong);padding:5px 8px;border-radius:5px;color:var(--ink);background:var(--paper);font:inherit}.editor-shell.dark .cm-panel.cm-dialog{background:var(--console);color:var(--console-text)}.editor-shell.dark .cm-panel.cm-dialog input,.editor-shell.dark .cm-panel.cm-dialog button{background:var(--console-raised);color:var(--console-text);border-color:var(--console-dim)}