:root{color:#25272d;background:#f5f2ec;font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif;font-synthesis:none;text-rendering:optimizeLegibility}*{box-sizing:border-box}body{margin:0;min-width:320px;min-height:100vh}button,input,select{font:inherit}button{cursor:pointer}.app-shell{display:grid;grid-template-columns:300px minmax(0,1fr);min-height:100vh}.catalog{display:flex;flex-direction:column;gap:22px;border-right:1px solid #ded8cf;background:#fcfbf8;padding:20px}.brand{display:flex;align-items:center;gap:12px}.brand-mark{display:grid;width:42px;height:42px;place-items:center;border-radius:8px;background:#293241;color:#fff;font-size:24px;font-weight:800}.brand strong,.brand span{display:block}.brand span{color:#6c6f77;font-size:13px}.mode-tabs{display:grid;gap:8px}.mode-tabs button,.lesson-list button{display:flex;align-items:center;width:100%;gap:10px;border:1px solid transparent;border-radius:8px;background:transparent;color:#333943;padding:11px 12px;text-align:left}.mode-tabs button.active,.lesson-list button.active{border-color:#cdd7d2;background:#eef7f3;color:#0f575a}.lesson-panel{min-height:0}.panel-title{display:flex;align-items:center;gap:8px;margin-bottom:10px;color:#535862;font-size:14px;font-weight:700}.lesson-list{display:grid;gap:8px}.lesson-list button{display:grid;gap:4px}.lesson-list small{color:#727782;font-size:12px;line-height:1.35}.workspace{display:grid;grid-template-rows:auto minmax(0,1fr);min-width:0;min-height:100vh}.topbar{display:flex;align-items:center;justify-content:space-between;gap:18px;padding:18px 22px 14px;border-bottom:1px solid #ded8cf;background:#fbfaf8}.topbar h1{margin:2px 0 4px;font-size:25px;letter-spacing:0}.topbar p{margin:0;color:#6a707a;line-height:1.45}.eyebrow{color:#0f7c80!important;font-size:13px;font-weight:800}.top-actions{display:flex;flex-wrap:wrap;justify-content:flex-end;gap:8px;min-width:220px}.top-actions span{display:inline-flex;align-items:center;gap:6px;border:1px solid #ddd5cb;border-radius:999px;background:#fff;padding:7px 10px;color:#525862;font-size:13px}.lab-grid{display:grid;grid-template-columns:minmax(0,1fr) 330px;gap:16px;min-height:0;padding:16px}.stage{position:relative;min-height:520px;overflow:hidden;border:1px solid #ded8cf;border-radius:8px;background:#fbfaf8}.plane-canvas,.space-stage{display:block;width:100%;height:100%;min-height:520px}.stage-readout{position:absolute;right:14px;bottom:14px;border:1px solid rgba(41,50,65,.18);border-radius:999px;background:#ffffffdb;padding:8px 12px;color:#293241;font-size:13px;-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px)}.control-panel{display:flex;flex-direction:column;gap:14px;overflow:auto;border:1px solid #ded8cf;border-radius:8px;background:#fffefd;padding:15px}.field{display:grid;gap:7px;color:#4f5560;font-size:13px;font-weight:700}.field input,.field select{width:100%;border:1px solid #d8d0c5;border-radius:8px;background:#fff;color:#25272d;padding:10px 11px;outline:none}.field input:focus,.field select:focus{border-color:#0f7c80;box-shadow:0 0 0 3px #0f7c8021}.slider-grid{display:grid;grid-template-columns:1fr 1fr;gap:12px 14px}.slider-grid label{display:grid;gap:8px;min-width:0;color:#4f5560;font-size:13px;font-weight:700}.slider-grid label.wide{grid-column:1 / -1}input[type=range]{accent-color:#0f7c80}.toolbar{display:flex;flex-wrap:wrap;gap:8px}.toolbar button,.secondary{display:inline-flex;align-items:center;gap:6px;border:1px solid #d7d1c7;border-radius:8px;background:#293241;color:#fff;padding:9px 11px;font-weight:750}.toolbar button:nth-child(2n){background:#0f7c80}.toolbar button:nth-child(3n){background:#e36414}.sandbox-actions{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:8px;border-top:1px solid #ebe5dc;padding-top:12px}.sandbox-actions button{display:inline-flex;align-items:center;justify-content:center;gap:6px;min-height:40px;border:1px solid transparent;border-radius:8px;background:#293241;color:#fff;padding:8px 9px;font-size:13px;font-weight:850}.sandbox-actions button:nth-child(2),.sandbox-actions button:nth-child(4){background:#0f7c80}.sandbox-actions button:nth-child(3){background:#e36414}.sandbox-actions button:nth-child(5){background:#2563eb}.sandbox-actions button:nth-child(6){background:#475569}.sandbox-save-status{grid-column:1 / -1;min-height:32px;border:1px solid rgba(205,213,210,.82);border-radius:8px;background:#f8fafce6;color:#64748b;padding:8px 9px;font-size:12px;font-weight:850;text-align:center}.experiment-card{display:grid;gap:8px;border:1px solid #dbeafe;border-radius:8px;background:#f8fbff;padding:11px}.experiment-card strong{color:#1f2937;font-size:13px}.experiment-card span{color:#526070;font-size:12px;line-height:1.45}.sandbox-readout span{display:flex;justify-content:space-between;gap:8px}.sandbox-readout strong{color:#293241;font-weight:850}.secondary{justify-content:center;background:#fff;color:#293241}.object-list,.readout-box{display:grid;gap:7px;border-top:1px solid #ebe5dc;padding-top:12px}.object-list span,.readout-box span{border-radius:8px;background:#f5f2ec;padding:8px 10px;color:#535862;font-size:13px}.error{margin:0;border-radius:8px;background:#fff2eb;color:#a03b0d;padding:9px 10px;font-size:13px}@media(max-width:980px){.app-shell{grid-template-columns:1fr}.catalog{border-right:0;border-bottom:1px solid #ded8cf}.mode-tabs,.lesson-list{grid-template-columns:repeat(3,minmax(0,1fr))}.lab-grid{grid-template-columns:1fr}.topbar{align-items:flex-start;flex-direction:column}.top-actions{justify-content:flex-start;min-width:0}}@media(max-width:620px){.catalog,.lab-grid,.topbar{padding:12px}.mode-tabs,.lesson-list,.slider-grid{grid-template-columns:1fr}.topbar h1{font-size:21px}.stage,.plane-canvas,.space-stage{min-height:430px}}.object-editor-list{display:grid;gap:10px;border-top:1px solid #ebe5dc;padding-top:12px}.object-editor-list header{display:grid;gap:3px}.object-editor-list header strong{color:#293241;font-size:14px}.object-editor-list header small,.empty-state{margin:0;color:#747984;font-size:12px;line-height:1.4}.object-editor{display:grid;gap:9px;border:1px solid #e3ddd4;border-radius:8px;background:#f8f5ef;padding:10px}.object-editor-head{display:flex;align-items:center;justify-content:space-between;gap:8px;color:#293241;font-size:13px;font-weight:800}.object-editor-head button{border:1px solid #d8d0c5;border-radius:7px;background:#fff;color:#7a2d10;padding:5px 8px;font-size:12px;font-weight:700}.mini-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:8px}.mini-grid.four{grid-template-columns:repeat(4,minmax(0,1fr))}.mini-field{display:grid;gap:5px;color:#555b65;font-size:12px;font-weight:750}.mini-field input{width:100%;min-width:0;border:1px solid #d8d0c5;border-radius:7px;background:#fff;color:#25272d;padding:7px 8px;outline:none}.mini-field input:focus{border-color:#0f7c80;box-shadow:0 0 0 3px #0f7c801f}@media(max-width:620px){.mini-grid.four{grid-template-columns:repeat(2,minmax(0,1fr))}}.plane-canvas{cursor:grab;touch-action:none}.plane-canvas:active,.plane-canvas.is-dragging{cursor:grabbing}.stage-tools{position:absolute;left:14px;top:14px;display:flex;gap:7px;border:1px solid rgba(41,50,65,.14);border-radius:999px;background:#ffffffe0;padding:6px;-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px)}.stage-tools button{display:grid;width:31px;height:31px;place-items:center;border:0;border-radius:999px;background:#293241;color:#fff;padding:0}.stage-tools button:nth-child(2){background:#0f7c80}.stage-tools button:nth-child(3){background:#e36414}.stage-hint{position:absolute;left:15px;bottom:14px;border:1px solid rgba(41,50,65,.14);border-radius:999px;background:#ffffffdb;padding:8px 12px;color:#535862;font-size:13px;-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px)}@media(max-width:620px){.stage-hint{display:none}}html,body,#root{height:100%;overflow:hidden}.app-shell{height:100vh;overflow:hidden}.catalog{min-height:0;overflow-y:auto}.workspace{height:100vh;min-height:0;overflow:hidden}.topbar{padding:14px 28px 12px}.topbar h1{font-size:26px;line-height:1.15}.lab-grid{grid-template-columns:minmax(0,1fr) 392px;min-height:0;overflow:hidden;padding:20px}.stage,.plane-canvas,.space-stage{min-height:0;height:100%}.control-panel{min-height:0;max-height:100%;overflow-y:auto;overscroll-behavior:contain}.plane-control-panel{gap:10px;padding:12px}.compact-field{gap:6px;font-size:12px}.compact-field input{padding:8px 10px;min-height:38px}.compact-sliders{gap:8px 14px}.compact-sliders label{gap:4px;font-size:12px}.compact-sliders input[type=range]{height:18px}.compact-toolbar{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:7px}.compact-toolbar button,.compact-secondary{justify-content:center;min-height:38px;padding:7px 8px;font-size:14px;line-height:1;white-space:nowrap}.compact-toolbar button:nth-child(4),.compact-toolbar button:nth-child(5){grid-column:span 1}.object-editor-list{gap:8px;padding-top:10px}.object-editor{gap:7px;padding:9px}.object-editor-head button{padding:4px 7px}.mini-field input{min-width:0;padding:6px 7px;font-size:13px}.mini-grid{gap:7px}.mini-grid.four{grid-template-columns:repeat(2,minmax(0,1fr))}.stage-readout{right:12px;bottom:12px}.stage-hint{left:12px;bottom:12px}@media(max-width:980px){html,body,#root,.app-shell,.workspace{height:auto;min-height:100vh;overflow:visible}.lab-grid{grid-template-columns:1fr;overflow:visible}.stage{min-height:520px}.control-panel{max-height:none}}.plane-control-panel .object-editor-list{position:fixed;left:324px;bottom:24px;z-index:20;width:min(380px,calc(100vw - 760px));min-width:320px;max-height:46vh;overflow-y:auto;overscroll-behavior:contain;border:1px solid rgba(215,209,199,.86);border-radius:8px;background:#ffffffeb;box-shadow:0 18px 42px #29324124;padding:12px;-webkit-backdrop-filter:blur(16px);backdrop-filter:blur(16px)}.plane-control-panel .object-editor-list header{position:sticky;top:-12px;z-index:2;margin:-12px -12px 0;border-bottom:1px solid rgba(235,229,220,.9);background:#fffffff0;padding:12px;-webkit-backdrop-filter:blur(14px);backdrop-filter:blur(14px)}.floating-object-actions{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:7px;margin-top:2px}.floating-object-actions button{display:inline-flex;align-items:center;justify-content:center;gap:5px;border:1px solid #d7d1c7;border-radius:8px;background:#293241;color:#fff;padding:7px 8px;font-size:13px;font-weight:750}.floating-object-actions button:nth-child(2){background:#0f7c80}.floating-object-actions button:nth-child(3){background:#e36414}.plane-control-panel .object-editor{background:#f8f5efeb}@media(max-width:1280px){.plane-control-panel .object-editor-list{width:340px;min-width:300px}}.matter-stage,.matter-stage canvas{display:block;width:100%;height:100%;min-height:520px;touch-action:none}.matter-stage canvas{cursor:grab}.matter-stage canvas:active{cursor:grabbing}.matter-tools{position:absolute;left:14px;top:14px;z-index:5;display:flex;flex-wrap:wrap;gap:7px;max-width:calc(100% - 28px);border:1px solid rgba(41,50,65,.14);border-radius:999px;background:#ffffffe6;padding:6px;-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px)}.matter-tools button{display:inline-flex;align-items:center;justify-content:center;gap:5px;min-height:31px;border:0;border-radius:999px;background:#293241;color:#fff;padding:6px 10px;font-size:12px;font-weight:850}.matter-tools button:nth-child(2),.matter-tools button:nth-child(4){background:#0f7c80}.matter-tools button:nth-child(3){background:#e36414}@media(max-width:620px){.matter-stage,.matter-stage canvas{min-height:390px}.matter-tools{left:8px;top:8px;gap:5px;border-radius:12px;padding:5px}.matter-tools button{min-height:30px;padding:5px 7px;font-size:11px}}@media(max-width:980px){.plane-control-panel .object-editor-list{position:static;width:auto;min-width:0;max-height:none;box-shadow:none}.plane-control-panel .object-editor-list header{position:static;margin:0;padding:0;border-bottom:0;background:transparent;-webkit-backdrop-filter:none;backdrop-filter:none}}.plane-lab-grid{position:relative}.plane-control-panel .compact-toolbar{grid-template-columns:repeat(2,minmax(0,1fr))}.plane-control-panel .compact-toolbar button:nth-child(3){grid-column:1 / -1}.floating-object-panel{position:fixed;left:324px;bottom:24px;z-index:25;display:grid;gap:10px;width:min(430px,calc(100vw - 770px));min-width:360px;max-height:58vh;overflow-y:auto;overscroll-behavior:contain;border:1px solid rgba(205,213,210,.72);border-radius:10px;background:#ffffffb8;box-shadow:0 18px 48px #29324129;padding:12px;-webkit-backdrop-filter:blur(18px) saturate(1.15);backdrop-filter:blur(18px) saturate(1.15)}.plane-control-panel .object-editor-list,.floating-object-panel{border-top:0}.floating-object-panel header,.plane-control-panel .object-editor-list header{position:sticky;top:-12px;z-index:2;margin:-12px -12px 0;border-bottom:1px solid rgba(235,229,220,.72);background:#ffffffc7;padding:12px;-webkit-backdrop-filter:blur(16px);backdrop-filter:blur(16px)}.floating-section-title{display:flex;align-items:center;justify-content:space-between;gap:8px;color:#293241;font-size:13px;font-weight:850}.floating-section-title button{display:inline-flex;align-items:center;gap:5px;border:1px solid #d7d1c7;border-radius:8px;background:#293241;color:#fff;padding:6px 8px;font-size:12px;font-weight:800}.floating-object-panel .object-editor,.plane-control-panel .object-editor{background:#f8f5efa8;-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px)}.function-editor{border-color:#0f7c8038}.function-row{align-items:end}.stats-summary-card{border-color:#7c3aed3d;background:#ffffffb8}.stats-result-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:8px;margin-top:10px}.stats-result-grid span{display:flex;justify-content:space-between;gap:8px;border:1px solid rgba(205,194,178,.75);border-radius:8px;padding:7px 8px;color:#555b65;font-size:12px;font-weight:700;background:#fbfaf8c7}.stats-result-grid strong{color:#1f2937}.color-field input[type=color]{height:32px;padding:3px}.mini-check{display:inline-flex;align-items:center;gap:7px;min-height:32px;color:#555b65;font-size:12px;font-weight:750}.mini-error{padding:6px 8px;font-size:12px}.shape-actions{grid-template-columns:repeat(3,minmax(0,1fr))}.shape-actions button:nth-child(4),.shape-actions button:nth-child(5),.shape-actions button:nth-child(6){background:#fff;color:#293241}@media(max-width:1320px){.floating-object-panel{width:390px;min-width:330px}}@media(max-width:980px){.floating-object-panel{position:static;width:auto;min-width:0;max-height:none;box-shadow:none}.floating-object-panel header,.plane-control-panel .object-editor-list header{position:static;margin:0;padding:0;border-bottom:0;background:transparent;-webkit-backdrop-filter:none;backdrop-filter:none}}.plane-control-panel.right-object-panel{display:flex;gap:12px;padding:12px}.right-object-panel .right-section{display:grid;gap:9px;border-bottom:1px solid #ebe5dc;padding-bottom:12px}.right-object-panel .right-section-title{display:flex;align-items:center;justify-content:space-between;gap:8px;color:#293241;font-size:13px}.right-object-panel .right-section-title button{display:inline-flex;align-items:center;gap:5px;border:1px solid #d7d1c7;border-radius:8px;background:#293241;color:#fff;padding:6px 8px;font-size:12px;font-weight:800}.right-object-panel .object-editor-list,.right-object-panel.floating-object-panel,.plane-control-panel .object-editor-list{position:static!important;left:auto!important;bottom:auto!important;width:auto!important;min-width:0!important;max-height:none!important;overflow:visible!important;border:0!important;border-radius:0!important;background:transparent!important;box-shadow:none!important;padding:0!important;-webkit-backdrop-filter:none!important;backdrop-filter:none!important}.right-object-panel .object-editor-list header,.plane-control-panel .object-editor-list header{position:static!important;margin:0!important;padding:0!important;border-bottom:0!important;background:transparent!important;-webkit-backdrop-filter:none!important;backdrop-filter:none!important}.right-object-panel .object-editor{background:#f8f5efdb}.function-param-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:7px 10px;border-top:1px solid rgba(215,209,199,.72);padding-top:8px}.function-param-grid label{display:grid;gap:3px;color:#555b65;font-size:12px;font-weight:750}.function-param-grid input[type=range]{height:18px}.mini-reset{display:inline-flex;align-items:center;justify-content:center;gap:5px;border:1px solid #d7d1c7;border-radius:8px;background:#fff;color:#293241;padding:6px 8px;font-size:12px;font-weight:800}.single-row{grid-template-columns:repeat(2,minmax(0,1fr))!important}.plane-save-toolbar{align-items:center}.plane-save-status{grid-column:1 / -1;min-height:28px;border:1px solid rgba(205,213,210,.82);border-radius:8px;background:#f8fafce6;color:#64748b;padding:7px 9px;font-size:12px;font-weight:850;text-align:center}.plane-save-status.saving{color:#9a3412;background:#fff7edeb}.plane-save-status.saved{color:#0f766e;background:#f0fdfaeb}.right-object-panel .shape-actions{grid-template-columns:repeat(3,minmax(0,1fr))}.course-shell{min-height:100vh;background:#f8fafc}.course-workspace{display:block;height:100vh;min-height:0;overflow-y:auto;background:linear-gradient(180deg,#fbfcff,#f8fafc 42%,#f6f4ff)}.course-topbar{position:sticky;top:0;z-index:12;border-bottom-color:#e7eaf0;background:#fbfcffeb;-webkit-backdrop-filter:blur(14px);backdrop-filter:blur(14px)}.course-stats span{border-color:#e5e7ef;box-shadow:0 8px 26px #1f29370a}.current-lesson-panel{display:grid;gap:10px}.current-lesson-card{display:grid;grid-template-columns:34px minmax(0,1fr);gap:6px 10px;align-items:center;width:100%;border:1px solid #d6e1ee;border-radius:8px;background:#fff;padding:10px;color:#111827;text-align:left}.current-lesson-card strong,.current-lesson-card small{min-width:0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.current-lesson-card small{grid-column:2;color:#6b7280;font-size:12px}.course-browser{padding:24px 26px 10px}.course-browser-head{display:flex;align-items:end;justify-content:space-between;gap:16px;margin-bottom:18px}.course-browser-head p,.course-section-title small{margin:0 0 4px;color:#64748b;font-size:12px;font-weight:850}.course-browser-head h2,.course-section-title h3{margin:0;color:#0f172a;letter-spacing:0}.course-browser-head span{display:block;margin-top:6px;color:#64748b}.course-browser-head>strong,.course-section-title>span{flex:0 0 auto;border:1px solid #e5e7ef;border-radius:999px;background:#ffffffd1;padding:8px 12px;color:#64748b;font-size:12px;font-weight:850}.course-sections{display:grid;gap:28px}.course-section{display:grid;gap:14px}.course-section-title{display:flex;align-items:center;justify-content:space-between;gap:14px}.course-card-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px}.course-card{display:grid;grid-template-columns:40px minmax(0,1fr);gap:12px;min-height:116px;border:1px solid #e7eaf0;border-radius:8px;background:#ffffffc7;padding:16px;color:#111827;text-align:left;box-shadow:0 10px 30px #0f172a08;transition:border-color .14s ease,box-shadow .14s ease,transform .14s ease}.course-card:hover,.course-card.active{border-color:#a9c4ff;box-shadow:0 16px 38px #2563eb14;transform:translateY(-1px)}.course-icon{display:grid;width:40px;height:40px;place-items:center;border-radius:8px;background:#e9efff;font-size:20px;line-height:1}.course-copy{display:grid;gap:6px;min-width:0}.course-copy strong{color:#111827;font-size:15px;line-height:1.25}.course-copy small{color:#718096;font-size:12px;line-height:1.4}.course-copy em,.active-lab-head>strong{width:fit-content;border-radius:999px;background:#dff8fb;color:#0891a2;padding:4px 9px;font-size:12px;font-style:normal;font-weight:850}.active-lab-wrap{display:grid;gap:0;margin:22px 26px 26px;border:1px solid #e7eaf0;border-radius:10px;background:#ffffffb8;box-shadow:0 18px 50px #0f172a0d;overflow:hidden}.active-lab-head{display:flex;align-items:center;justify-content:space-between;gap:18px;border-bottom:1px solid #e7eaf0;padding:16px 18px;background:#ffffffd1}.active-lab-head h2{margin:2px 0 4px;color:#111827;font-size:23px;letter-spacing:0}.active-lab-head span{color:#64748b}.active-lab-wrap .lab-grid{padding:14px}@media(max-width:1180px){.course-card-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}@media(max-width:900px){.course-shell{display:block}.course-workspace{height:auto;min-height:100vh;overflow:visible}.course-card-grid{grid-template-columns:1fr}.course-browser,.active-lab-wrap{margin-left:14px;margin-right:14px;padding-left:0;padding-right:0}.course-browser-head,.active-lab-head{align-items:flex-start;flex-direction:column}}.sidebar-course-shell{grid-template-columns:380px minmax(0,1fr);height:100vh;min-height:0;overflow:hidden}.course-catalog{height:100vh;min-height:0;overflow-y:auto;overscroll-behavior:contain;gap:16px;padding:18px}.sidebar-course-browser{display:grid;gap:12px;min-height:0}.sidebar-course-head,.sidebar-course-section-title{display:flex;align-items:center;justify-content:space-between;gap:10px}.sidebar-course-head{border-top:1px solid #ebeef4;padding-top:14px}.sidebar-course-head small{display:block;margin-bottom:2px;color:#64748b;font-size:12px;font-weight:850}.sidebar-course-head strong,.sidebar-course-section-title strong{color:#111827;font-size:15px}.sidebar-course-head>span,.sidebar-course-section-title>span{flex:0 0 auto;border:1px solid #e5e7ef;border-radius:999px;background:#fff;padding:5px 8px;color:#64748b;font-size:12px;font-weight:850}.sidebar-course-sections{display:grid;gap:16px}.sidebar-course-section,.sidebar-course-list{display:grid;gap:8px}.sidebar-course-card{display:grid;grid-template-columns:34px minmax(0,1fr);gap:10px;align-items:start;min-height:82px;width:100%;border:1px solid #e7eaf0;border-radius:8px;background:#ffffffd1;padding:10px;color:#111827;text-align:left;box-shadow:none;transition:border-color .14s ease,background .14s ease}.sidebar-course-card:hover,.sidebar-course-card.active{border-color:#a9c4ff;background:#f8fbff}.sidebar-course-card .course-icon,.current-lesson-card .course-icon{width:34px;height:34px;font-size:17px}.sidebar-course-card .course-copy{gap:4px}.sidebar-course-card .course-copy strong{font-size:14px}.sidebar-course-card .course-copy small{display:-webkit-box;overflow:hidden;color:#6b7280;font-size:12px;line-height:1.35;-webkit-box-orient:vertical;-webkit-line-clamp:2}.sidebar-course-card .course-copy em{padding:3px 8px;font-size:11px}.sidebar-active-lab-wrap{margin:16px}.sidebar-active-lab-wrap .lab-grid{padding:0}@media(max-width:1180px){.sidebar-course-shell{grid-template-columns:340px minmax(0,1fr)}}@media(max-width:900px){.sidebar-course-shell{display:block;height:auto;overflow:visible}.course-catalog{height:auto;max-height:none;overflow:visible}.sidebar-active-lab-wrap{margin:14px}}.sidebar-course-head{align-items:flex-start;min-height:52px;padding-bottom:8px}.sidebar-course-head>div{display:grid;gap:4px;min-width:0}.sidebar-course-head small{line-height:1;margin:0}.sidebar-course-head strong{display:block;line-height:1.25}.sidebar-course-head>span{margin-top:2px}.sidebar-course-section-title{width:100%;border:1px solid #e7eaf0;border-radius:8px;background:#ffffffc2;padding:9px 10px;color:#111827;text-align:left}.sidebar-course-section-title>span{display:inline-flex;align-items:center;gap:7px;min-width:0}.sidebar-course-section-title svg{flex:0 0 auto;color:#64748b;transform:rotate(-90deg);transition:transform .14s ease}.sidebar-course-section-title.expanded svg{transform:rotate(0)}.sidebar-course-section-title strong{overflow:hidden;text-overflow:ellipsis;white-space:nowrap;line-height:1.25}.sidebar-course-section-title>em{flex:0 0 auto;border:1px solid #e5e7ef;border-radius:999px;background:#fff;padding:4px 8px;color:#64748b;font-size:12px;font-style:normal;font-weight:850}.sidebar-course-section-title:hover,.sidebar-course-section-title.expanded{border-color:#c7d7fe;background:#f8fbff}.current-lesson-panel{margin-bottom:14px}.current-lesson-card{min-height:72px;overflow:hidden}.sidebar-course-browser{display:block;margin-top:8px;clear:both}.sidebar-course-head{display:flex!important;position:relative;z-index:1;clear:both;margin-top:10px;margin-bottom:12px;padding:14px 0 12px;border-top:1px solid #ebeef4;background:#fcfbf8}.sidebar-course-sections{clear:both}.topbar-main-copy{min-width:0}.expression-support{display:flex;flex-wrap:wrap;gap:6px;max-width:980px;margin-top:10px}.expression-support span{display:inline-flex;align-items:center;gap:6px;max-width:100%;border:1px solid #e5e7ef;border-radius:999px;background:#ffffffc7;padding:5px 9px;color:#4b5563;font-size:12px;line-height:1.25;white-space:normal;box-shadow:0 5px 18px #0f172a08}.expression-support strong{color:#0f7c80;font-weight:850}@media(max-width:1100px){.course-topbar{align-items:flex-start;flex-direction:column}.expression-support span{border-radius:8px}}.plane-lab-grid{height:calc(100vh - 210px);min-height:560px}.plane-lab-grid .stage,.plane-lab-grid .plane-canvas{min-height:0;height:100%}.plane-control-panel.right-object-panel{min-height:0;max-height:100%;overflow:hidden}.right-object-panel .right-section{min-height:0;overflow-y:auto;overscroll-behavior:contain;padding-right:4px}.right-object-panel .right-section:first-child{flex:0 1 46%}.right-object-panel .right-section:nth-child(2){flex:1 1 54%}.right-object-panel .right-section-title{position:sticky;top:0;z-index:2;margin:-1px -4px 0 0;background:#fffefdf0;padding:2px 0 8px;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px)}.right-object-panel .right-section::-webkit-scrollbar{width:8px}.right-object-panel .right-section::-webkit-scrollbar-thumb{border:2px solid transparent;border-radius:999px;background:#cbd5e1;background-clip:content-box}.right-object-panel .right-section::-webkit-scrollbar-track{background:transparent}@media(max-width:1100px){.plane-lab-grid{height:auto;min-height:0}.plane-control-panel.right-object-panel{max-height:none;overflow:visible}.right-object-panel .right-section{max-height:420px}}.drawable-actions{grid-template-columns:repeat(2,minmax(0,1fr))}.advanced-editor{border-color:#dbeafe;background:#f8fbffd1}.mini-field textarea,.mini-field select{width:100%;border:1px solid #d8cfc3;border-radius:8px;background:#fffefa;color:#1f2937;font:inherit;outline:none}.mini-field textarea{min-height:84px;resize:vertical;padding:9px 10px;line-height:1.45}.mini-field select{height:36px;padding:0 10px}.mini-field textarea:focus,.mini-field select:focus{border-color:#0f7c80;box-shadow:0 0 0 3px #0f7c801f}.plane-control-panel.right-object-panel.tabbed-right-panel{display:flex;flex-direction:column;gap:10px}.right-panel-tabs{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:6px;flex:0 0 auto;border:1px solid #e5dfd4;border-radius:10px;background:#f8f5efe6;padding:4px}.right-panel-tabs button{min-height:34px;border:0;border-radius:8px;background:transparent;color:#64748b;font-size:13px;font-weight:850}.right-panel-tabs button.active{background:#293241;color:#fff;box-shadow:0 8px 18px #29324129}.right-object-panel .right-tab-section{flex:1 1 auto!important;border-bottom:0;padding-bottom:0}.right-object-panel .right-section.right-tab-section:first-child,.right-object-panel .right-section.right-tab-section:nth-child(2){flex:1 1 auto}@media(max-width:1100px){.right-object-panel .right-tab-section{max-height:520px}}.space-lab-grid{height:calc(100vh - 210px);min-height:640px}.space-lab-grid .stage,.space-lab-grid .space-stage{min-height:0;height:100%}.space-stage{cursor:grab;touch-action:none;overscroll-behavior:contain;background:radial-gradient(circle at 30% 18%,#fffffffa,#f8fafcd6 38%,#f1f5f9b8)}.space-stage:active{cursor:grabbing}.space-status-overlay{position:absolute;left:18px;bottom:18px;z-index:4;max-width:min(360px,calc(100% - 36px));border:1px solid rgba(31,122,140,.24);border-radius:8px;padding:8px 11px;background:#fffdfaeb;box-shadow:0 8px 24px #29324114;color:#1f7a8c;font-size:12px;font-weight:800;pointer-events:none}.space-stage canvas{display:block;width:100%;height:100%;touch-action:none}.space-control-panel{gap:12px}.space-param-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:9px 12px;border-top:1px solid #ebe5dc;border-bottom:1px solid #ebe5dc;padding:11px 0}.space-param-grid>strong{grid-column:1 / -1;color:#293241;font-size:13px}.space-param-grid label{display:grid;gap:5px;min-width:0;color:#4f5560;font-size:12px;font-weight:750}.space-param-grid input[type=range]{height:18px}.domain-grid input[type=number]{width:100%;min-width:0;border:1px solid #d8cfc3;border-radius:7px;padding:7px 8px;background:#fffdfa;color:#293241;font:inherit}.space-color-picker{display:grid;grid-template-columns:1fr 46px;align-items:center;gap:10px;border:1px solid #e5ddd1;border-radius:10px;background:#fffdfa;padding:9px 10px;color:#293241;font-size:12px;font-weight:800}.space-color-picker input[type=color]{width:46px;height:30px;border:1px solid #d8cfc3;border-radius:8px;padding:2px;background:#fff;cursor:pointer}@media(max-width:1100px){.space-lab-grid{height:auto;min-height:0}.space-lab-grid .stage,.space-lab-grid .space-stage{min-height:560px}}.space-stage-tools{position:absolute;left:14px;top:14px;z-index:3;display:flex;flex-wrap:wrap;gap:6px;max-width:calc(100% - 28px);border:1px solid rgba(41,50,65,.14);border-radius:999px;background:#ffffffe0;padding:6px;-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px)}.space-stage-tools button{min-width:44px;min-height:30px;border:0;border-radius:999px;background:#293241;color:#fff;padding:5px 10px;font-size:12px;font-weight:850}.space-stage-tools button:nth-child(2),.space-stage-tools button:nth-child(4){background:#0f7c80}.space-stage-tools button:nth-child(3),.space-stage-tools button:nth-child(5){background:#e36414}.space-expression-grid{display:grid;gap:9px;border:1px solid #ebe5dc;border-radius:10px;background:#f8f5efb8;padding:10px}.space-control-panel .field input{min-width:0}@media(max-width:620px){.space-stage-tools{border-radius:10px}.space-stage-tools button{min-width:40px;padding:5px 8px}}.mode-space.sidebar-course-shell{grid-template-columns:320px minmax(0,1fr)}.mode-space .course-catalog{padding:16px}.mode-space .sidebar-active-lab-wrap{margin:12px}.mode-space .active-lab-wrap .lab-grid.space-lab-grid,.mode-space .space-lab-grid{grid-template-columns:minmax(560px,1fr) 300px;gap:12px;padding:0}.mode-space .space-control-panel{padding:12px;gap:10px}.mode-space .space-param-grid{gap:8px 10px}.mode-space .space-param-grid label{font-size:11px}.mode-space .space-expression-grid{padding:8px}@media(min-width:1440px){.mode-space.sidebar-course-shell{grid-template-columns:340px minmax(0,1fr)}.mode-space .active-lab-wrap .lab-grid.space-lab-grid,.mode-space .space-lab-grid{grid-template-columns:minmax(720px,1fr) 320px}}@media(min-width:1680px){.mode-space.sidebar-course-shell{grid-template-columns:360px minmax(0,1fr)}.mode-space .active-lab-wrap .lab-grid.space-lab-grid,.mode-space .space-lab-grid{grid-template-columns:minmax(900px,1fr) 340px}}@media(max-width:1180px){.mode-space.sidebar-course-shell{grid-template-columns:300px minmax(0,1fr)}.mode-space .active-lab-wrap .lab-grid.space-lab-grid,.mode-space .space-lab-grid{grid-template-columns:minmax(0,1fr) 280px}}@media(max-width:980px){.mode-space.sidebar-course-shell{display:block}.mode-space .active-lab-wrap .lab-grid.space-lab-grid,.mode-space .space-lab-grid{grid-template-columns:1fr}}@media(max-width:900px){html,body{overflow-x:hidden}.sidebar-course-shell,.mode-space.sidebar-course-shell{display:block;height:auto;min-height:100vh;overflow:visible}.course-catalog,.mode-space .course-catalog{position:sticky;top:0;z-index:30;max-height:44vh;overflow-y:auto;overscroll-behavior:contain;border-right:0;border-bottom:1px solid #ded8cf;padding:12px;background:#fcfbf8f7;-webkit-backdrop-filter:blur(14px);backdrop-filter:blur(14px)}.brand{gap:10px}.brand-mark{width:36px;height:36px;border-radius:8px;font-size:21px}.mode-tabs{grid-template-columns:repeat(3,minmax(0,1fr));gap:7px}.mode-tabs button{justify-content:center;min-height:42px;padding:8px 6px;text-align:center}.mode-tabs button span{overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.current-lesson-panel{display:none}.sidebar-course-browser{gap:8px}.sidebar-course-head{min-height:0;padding-top:10px;padding-bottom:4px}.sidebar-course-sections{gap:8px}.sidebar-course-section-title{min-height:42px;padding:8px 10px}.sidebar-course-list{max-height:30vh;overflow-y:auto;overscroll-behavior:contain;padding-right:2px}.sidebar-course-card{min-height:66px;padding:9px}.course-workspace{height:auto;min-height:0;overflow:visible}.course-topbar,.topbar{padding:12px 14px}.topbar-main-copy{gap:8px}.topbar h1{font-size:22px;line-height:1.16}.topbar p{font-size:14px}.expression-support{display:flex;flex-wrap:nowrap;gap:7px;max-width:100%;overflow-x:auto;padding-bottom:2px;-webkit-overflow-scrolling:touch}.expression-support span{flex:0 0 auto;white-space:nowrap}.top-actions{width:100%;justify-content:flex-start}.sidebar-active-lab-wrap,.mode-space .sidebar-active-lab-wrap{margin:10px}.active-lab-wrap .lab-grid,.mode-space .active-lab-wrap .lab-grid.space-lab-grid,.mode-space .space-lab-grid,.lab-grid{grid-template-columns:1fr;gap:10px;padding:0}.control-panel,.plane-control-panel.right-object-panel,.mode-space .space-control-panel{width:100%;max-height:none;overflow:visible;padding:12px}.stage,.plane-canvas,.space-stage{min-height:480px}.space-lab-grid{height:auto;min-height:0}.space-lab-grid .stage,.space-lab-grid .space-stage{height:min(68vh,620px);min-height:440px}.space-stage-tools{left:10px;top:10px;gap:5px;border-radius:12px;padding:5px}.space-stage-tools button{min-width:40px;min-height:32px;padding:5px 8px;font-size:12px}.stage-hint{left:10px;bottom:10px;max-width:calc(100% - 20px);font-size:12px}.stage-readout{right:10px;bottom:10px;max-width:calc(100% - 20px);padding:7px 10px;font-size:12px}}@media(max-width:620px){.course-catalog,.mode-space .course-catalog{max-height:38vh;padding:10px}.brand span{font-size:12px}.mode-tabs button{flex-direction:column;gap:4px;min-height:52px;font-size:12px}.sidebar-course-head small{font-size:11px}.sidebar-course-head strong,.sidebar-course-section-title strong{font-size:14px}.sidebar-course-card{grid-template-columns:30px minmax(0,1fr);min-height:58px}.sidebar-course-card .course-icon{width:30px;height:30px;font-size:15px}.sidebar-course-card .course-copy strong{font-size:13px}.sidebar-course-card .course-copy small{-webkit-line-clamp:1}.course-topbar,.topbar{padding:10px 12px}.topbar h1{font-size:20px}.top-actions span{padding:5px 8px;font-size:12px}.sidebar-active-lab-wrap,.mode-space .sidebar-active-lab-wrap{margin:8px}.stage,.plane-canvas,.space-stage{border-radius:8px;min-height:390px}.space-lab-grid .stage,.space-lab-grid .space-stage{height:58vh;min-height:380px}.space-stage-tools{max-width:calc(100% - 20px)}.space-stage-tools button{min-width:36px;min-height:30px;padding:5px 7px;font-size:11px}.space-control-panel .field select,.space-control-panel .field input,.field input,.field select,.domain-grid input[type=number]{min-height:42px;font-size:16px}.space-param-grid,.slider-grid{grid-template-columns:1fr}.space-param-grid label,.slider-grid label{font-size:12px}.toolbar button,.secondary{min-height:42px;justify-content:center}.stage-readout{display:none}}@media(max-width:420px){.course-catalog,.mode-space .course-catalog{max-height:34vh}.expression-support span{font-size:11px}.space-lab-grid .stage,.space-lab-grid .space-stage{height:54vh;min-height:340px}.stage-hint{display:none}}@media(max-width:900px){.topbar-main-copy,.course-topbar>.topbar-main-copy{width:100%;max-width:100%;min-width:0}.topbar-main-copy>h1,.topbar-main-copy>p,.topbar-main-copy>.eyebrow{width:100%;max-width:100%}.expression-support{width:100%;max-width:100%}}@media(max-width:900px){.course-catalog,.sidebar-course-list,.expression-support{scrollbar-width:none}.course-catalog::-webkit-scrollbar,.sidebar-course-list::-webkit-scrollbar,.expression-support::-webkit-scrollbar{display:none}}.mode-plane.sidebar-course-shell{grid-template-columns:320px minmax(0,1fr)}.mode-plane .course-catalog{padding:16px}.mode-plane .sidebar-active-lab-wrap{margin:12px}.mode-plane .active-lab-wrap .lab-grid.plane-lab-grid,.mode-plane .plane-lab-grid{grid-template-columns:minmax(560px,1fr) 300px;gap:12px;padding:0}.mode-plane .plane-control-panel.right-object-panel{padding:12px;gap:10px}.mode-plane .right-panel-tabs button{min-height:32px;font-size:12px}.mode-plane .floating-object-actions{gap:6px}.mode-plane .floating-object-actions button,.mode-plane .right-object-panel .right-section-title button{min-height:32px;padding:6px 8px;font-size:12px}.mode-plane .object-editor{gap:8px;padding:9px}.mode-plane .mini-field,.mode-plane .function-param-grid label{font-size:11px}.mode-plane .function-param-grid{gap:6px 8px}@media(min-width:1440px){.mode-plane.sidebar-course-shell{grid-template-columns:340px minmax(0,1fr)}.mode-plane .active-lab-wrap .lab-grid.plane-lab-grid,.mode-plane .plane-lab-grid{grid-template-columns:minmax(760px,1fr) 320px}}@media(min-width:1680px){.mode-plane.sidebar-course-shell{grid-template-columns:360px minmax(0,1fr)}.mode-plane .active-lab-wrap .lab-grid.plane-lab-grid,.mode-plane .plane-lab-grid{grid-template-columns:minmax(980px,1fr) 340px}}@media(max-width:1180px){.mode-plane.sidebar-course-shell{grid-template-columns:300px minmax(0,1fr)}.mode-plane .active-lab-wrap .lab-grid.plane-lab-grid,.mode-plane .plane-lab-grid{grid-template-columns:minmax(0,1fr) 280px}}@media(max-width:980px){.mode-plane.sidebar-course-shell{display:block}.mode-plane .active-lab-wrap .lab-grid.plane-lab-grid,.mode-plane .plane-lab-grid{grid-template-columns:1fr}}.selected-object-editor{border-color:#2563eb!important;background:#eff6fff5!important;box-shadow:0 0 0 3px #2563eb1f}.stage-tools button:disabled{opacity:.42;cursor:not-allowed;transform:none}.object-layer-head{align-items:center;gap:8px}.object-layer-actions{display:inline-flex;align-items:center;gap:4px;margin-left:auto}.object-layer-actions button{min-width:28px;min-height:28px;padding:5px 7px}.object-layer-actions button:disabled{opacity:.38;cursor:not-allowed}@media(max-width:980px){.mode-plane .active-lab-wrap .lab-grid.plane-lab-grid,.mode-plane .plane-lab-grid,.plane-lab-grid{height:auto;min-height:0}.mode-plane .plane-lab-grid .stage,.mode-plane .plane-lab-grid .plane-canvas,.plane-lab-grid .stage,.plane-lab-grid .plane-canvas{height:clamp(380px,62vh,620px);min-height:380px}.mode-plane .plane-control-panel.right-object-panel,.plane-control-panel.right-object-panel{max-height:none;overflow:visible}}@media(max-width:620px){.mode-plane .sidebar-active-lab-wrap,.sidebar-active-lab-wrap{margin:6px}.mode-plane .plane-lab-grid .stage,.mode-plane .plane-lab-grid .plane-canvas,.plane-lab-grid .stage,.plane-lab-grid .plane-canvas{height:clamp(360px,64vh,560px);min-height:360px}.mode-plane .stage-tools,.plane-lab-grid .stage-tools{top:8px;left:8px;gap:5px;padding:5px}.mode-plane .stage-tools button,.plane-lab-grid .stage-tools button{min-width:34px;min-height:32px;padding:5px 7px;font-size:11px}}@media(max-width:420px){.mode-plane .plane-lab-grid .stage,.mode-plane .plane-lab-grid .plane-canvas,.plane-lab-grid .stage,.plane-lab-grid .plane-canvas{height:clamp(350px,66vh,520px);min-height:350px}}.right-object-panel .shape-actions button,.mode-plane .floating-object-actions.shape-actions button{display:inline-flex;align-items:center;justify-content:center;gap:6px;background:#0f766e;color:#fff;border-color:transparent}.right-object-panel .shape-actions button:nth-child(2),.mode-plane .floating-object-actions.shape-actions button:nth-child(2){background:#0f766e}.right-object-panel .shape-actions button:nth-child(4),.right-object-panel .shape-actions button:nth-child(5),.right-object-panel .shape-actions button:nth-child(6),.mode-plane .floating-object-actions.shape-actions button:nth-child(4),.mode-plane .floating-object-actions.shape-actions button:nth-child(5),.mode-plane .floating-object-actions.shape-actions button:nth-child(6){background:#0f766e;color:#fff}.function-add-actions{grid-template-columns:repeat(2,minmax(0,1fr));gap:8px}.function-add-actions button{display:inline-flex;align-items:center;justify-content:center;gap:6px;min-height:34px;border-color:transparent;background:#223047;color:#fff;font-weight:850}.function-add-actions .primary-add-action{grid-column:1 / -1;min-height:38px;background:#0f766e;box-shadow:0 8px 18px #0f766e2e}.function-add-actions button:nth-child(3),.function-add-actions button:nth-child(5){background:#0f766e}.function-add-actions button:nth-child(4){background:#e75f14}.function-add-actions button svg{flex:0 0 auto}@media(max-width:620px){.function-add-actions{grid-template-columns:1fr}.function-add-actions .primary-add-action{grid-column:auto}}