:root{color:#15181d;font-synthesis:none;text-rendering:optimizelegibility;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;background:#f7f9fa;font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif}*{box-sizing:border-box}html{background:#f7f9fa;min-width:320px}body{min-width:320px;min-height:100vh;margin:0}button,input,select,textarea{font:inherit}button{cursor:pointer}button:disabled{cursor:not-allowed}#root{min-height:100vh}.react-flow{--xy-edge-stroke-default:#b1b1b7;--xy-edge-stroke-width-default:1;--xy-edge-stroke-selected-default:#555;--xy-connectionline-stroke-default:#b1b1b7;--xy-connectionline-stroke-width-default:1;--xy-attribution-background-color-default:#ffffff80;--xy-minimap-background-color-default:#fff;--xy-minimap-mask-background-color-default:#f0f0f099;--xy-minimap-mask-stroke-color-default:transparent;--xy-minimap-mask-stroke-width-default:1;--xy-minimap-node-background-color-default:#e2e2e2;--xy-minimap-node-stroke-color-default:transparent;--xy-minimap-node-stroke-width-default:2;--xy-background-color-default:transparent;--xy-background-pattern-dots-color-default:#91919a;--xy-background-pattern-lines-color-default:#eee;--xy-background-pattern-cross-color-default:#e2e2e2;background-color:var(--xy-background-color,var(--xy-background-color-default));--xy-node-color-default:inherit;--xy-node-border-default:1px solid #1a192b;--xy-node-background-color-default:#fff;--xy-node-group-background-color-default:#f0f0f040;--xy-node-boxshadow-hover-default:0 1px 4px 1px #00000014;--xy-node-boxshadow-selected-default:0 0 0 .5px #1a192b;--xy-node-border-radius-default:3px;--xy-handle-background-color-default:#1a192b;--xy-handle-border-color-default:#fff;--xy-selection-background-color-default:#0059dc14;--xy-selection-border-default:1px dotted #0059dccc;--xy-controls-button-background-color-default:#fefefe;--xy-controls-button-background-color-hover-default:#f4f4f4;--xy-controls-button-color-default:inherit;--xy-controls-button-color-hover-default:inherit;--xy-controls-button-border-color-default:#eee;--xy-controls-box-shadow-default:0 0 2px 1px #00000014;--xy-edge-label-background-color-default:#fff;--xy-edge-label-color-default:inherit;--xy-resize-background-color-default:#3367d9;direction:ltr}.react-flow.dark{--xy-edge-stroke-default:#3e3e3e;--xy-edge-stroke-width-default:1;--xy-edge-stroke-selected-default:#727272;--xy-connectionline-stroke-default:#b1b1b7;--xy-connectionline-stroke-width-default:1;--xy-attribution-background-color-default:#96969640;--xy-minimap-background-color-default:#141414;--xy-minimap-mask-background-color-default:#3c3c3c99;--xy-minimap-mask-stroke-color-default:transparent;--xy-minimap-mask-stroke-width-default:1;--xy-minimap-node-background-color-default:#2b2b2b;--xy-minimap-node-stroke-color-default:transparent;--xy-minimap-node-stroke-width-default:2;--xy-background-color-default:#141414;--xy-background-pattern-dots-color-default:#777;--xy-background-pattern-lines-color-default:#777;--xy-background-pattern-cross-color-default:#777;--xy-node-color-default:#f8f8f8;--xy-node-border-default:1px solid #3c3c3c;--xy-node-background-color-default:#1e1e1e;--xy-node-group-background-color-default:#f0f0f040;--xy-node-boxshadow-hover-default:0 1px 4px 1px #ffffff14;--xy-node-boxshadow-selected-default:0 0 0 .5px #999;--xy-handle-background-color-default:#bebebe;--xy-handle-border-color-default:#1e1e1e;--xy-selection-background-color-default:#c8c8dc14;--xy-selection-border-default:1px dotted #c8c8dccc;--xy-controls-button-background-color-default:#2b2b2b;--xy-controls-button-background-color-hover-default:#3e3e3e;--xy-controls-button-color-default:#f8f8f8;--xy-controls-button-color-hover-default:#fff;--xy-controls-button-border-color-default:#5b5b5b;--xy-controls-box-shadow-default:0 0 2px 1px #00000014;--xy-edge-label-background-color-default:#141414;--xy-edge-label-color-default:#f8f8f8}.react-flow__background{background-color:var(--xy-background-color-props,var(--xy-background-color,var(--xy-background-color-default)));pointer-events:none;z-index:-1}.react-flow__container{width:100%;height:100%;position:absolute;top:0;left:0}.react-flow__pane{z-index:1}.react-flow__pane.draggable{cursor:grab}.react-flow__pane.dragging{cursor:grabbing}.react-flow__pane.selection{cursor:pointer}.react-flow__viewport{transform-origin:0 0;z-index:2;pointer-events:none}.react-flow__renderer{z-index:4}.react-flow__selection{z-index:6}.react-flow__nodesselection-rect:focus,.react-flow__nodesselection-rect:focus-visible{outline:none}.react-flow__edge-path{stroke:var(--xy-edge-stroke,var(--xy-edge-stroke-default));stroke-width:var(--xy-edge-stroke-width,var(--xy-edge-stroke-width-default));fill:none}.react-flow__connection-path{stroke:var(--xy-connectionline-stroke,var(--xy-connectionline-stroke-default));stroke-width:var(--xy-connectionline-stroke-width,var(--xy-connectionline-stroke-width-default));fill:none}.react-flow .react-flow__edges{position:absolute}.react-flow .react-flow__edges svg{pointer-events:none;position:absolute;overflow:visible}.react-flow__edge{pointer-events:visibleStroke}.react-flow__edge.selectable{cursor:pointer}.react-flow__edge.animated path{stroke-dasharray:5;animation:.5s linear infinite dashdraw}.react-flow__edge.animated path.react-flow__edge-interaction{stroke-dasharray:none;animation:none}.react-flow__edge.inactive{pointer-events:none}.react-flow__edge.selected,.react-flow__edge:focus,.react-flow__edge:focus-visible{outline:none}.react-flow__edge.selected .react-flow__edge-path,.react-flow__edge.selectable:focus .react-flow__edge-path,.react-flow__edge.selectable:focus-visible .react-flow__edge-path{stroke:var(--xy-edge-stroke-selected,var(--xy-edge-stroke-selected-default))}.react-flow__edge-textwrapper{pointer-events:all}.react-flow__edge .react-flow__edge-text{pointer-events:none;-webkit-user-select:none;user-select:none}.react-flow__arrowhead polyline{stroke:var(--xy-edge-stroke,var(--xy-edge-stroke-default))}.react-flow__arrowhead polyline.arrowclosed{fill:var(--xy-edge-stroke,var(--xy-edge-stroke-default))}.react-flow__connection{pointer-events:none}.react-flow__connection .animated{stroke-dasharray:5;animation:.5s linear infinite dashdraw}svg.react-flow__connectionline{z-index:1001;position:absolute;overflow:visible}.react-flow__nodes{pointer-events:none;transform-origin:0 0}.react-flow__node{-webkit-user-select:none;user-select:none;pointer-events:all;transform-origin:0 0;box-sizing:border-box;cursor:default;position:absolute}.react-flow__node.selectable{cursor:pointer}.react-flow__node.draggable{cursor:grab;pointer-events:all}.react-flow__node.draggable.dragging{cursor:grabbing}.react-flow__nodesselection{z-index:3;transform-origin:0 0;pointer-events:none}.react-flow__nodesselection-rect{pointer-events:all;cursor:grab;position:absolute}.react-flow__handle{pointer-events:none;background-color:var(--xy-handle-background-color,var(--xy-handle-background-color-default));border:1px solid var(--xy-handle-border-color,var(--xy-handle-border-color-default));border-radius:100%;width:6px;min-width:5px;height:6px;min-height:5px;position:absolute}.react-flow__handle.connectingfrom{pointer-events:all}.react-flow__handle.connectionindicator{pointer-events:all;cursor:crosshair}.react-flow__handle-bottom{top:auto;bottom:0;left:50%;transform:translate(-50%,50%)}.react-flow__handle-top{top:0;left:50%;transform:translate(-50%,-50%)}.react-flow__handle-left{top:50%;left:0;transform:translate(-50%,-50%)}.react-flow__handle-right{top:50%;right:0;transform:translate(50%,-50%)}.react-flow__edgeupdater{cursor:move;pointer-events:all}.react-flow__pane.selection .react-flow__panel{pointer-events:none}.react-flow__panel{z-index:5;margin:15px;position:absolute}.react-flow__panel.top{top:0}.react-flow__panel.bottom{bottom:0}.react-flow__panel.top.center,.react-flow__panel.bottom.center{left:50%;transform:translate(-15px)translate(-50%)}.react-flow__panel.left{left:0}.react-flow__panel.right{right:0}.react-flow__panel.left.center,.react-flow__panel.right.center{top:50%;transform:translateY(-15px)translateY(-50%)}.react-flow__attribution{background:var(--xy-attribution-background-color,var(--xy-attribution-background-color-default));margin:0;padding:2px 3px;font-size:10px}.react-flow__attribution a{color:#999;text-decoration:none}@keyframes dashdraw{0%{stroke-dashoffset:10px}}.react-flow__edgelabel-renderer{pointer-events:none;-webkit-user-select:none;user-select:none;width:100%;height:100%;position:absolute;top:0;left:0}.react-flow__viewport-portal{-webkit-user-select:none;user-select:none;width:100%;height:100%;position:absolute;top:0;left:0}.react-flow__minimap{background:var(--xy-minimap-background-color-props,var(--xy-minimap-background-color,var(--xy-minimap-background-color-default)))}.react-flow__minimap-svg{display:block}.react-flow__minimap-mask{fill:var(--xy-minimap-mask-background-color-props,var(--xy-minimap-mask-background-color,var(--xy-minimap-mask-background-color-default)));stroke:var(--xy-minimap-mask-stroke-color-props,var(--xy-minimap-mask-stroke-color,var(--xy-minimap-mask-stroke-color-default)));stroke-width:var(--xy-minimap-mask-stroke-width-props,var(--xy-minimap-mask-stroke-width,var(--xy-minimap-mask-stroke-width-default)))}.react-flow__minimap-node{fill:var(--xy-minimap-node-background-color-props,var(--xy-minimap-node-background-color,var(--xy-minimap-node-background-color-default)));stroke:var(--xy-minimap-node-stroke-color-props,var(--xy-minimap-node-stroke-color,var(--xy-minimap-node-stroke-color-default)));stroke-width:var(--xy-minimap-node-stroke-width-props,var(--xy-minimap-node-stroke-width,var(--xy-minimap-node-stroke-width-default)))}.react-flow__background-pattern.dots{fill:var(--xy-background-pattern-color-props,var(--xy-background-pattern-color,var(--xy-background-pattern-dots-color-default)))}.react-flow__background-pattern.lines{stroke:var(--xy-background-pattern-color-props,var(--xy-background-pattern-color,var(--xy-background-pattern-lines-color-default)))}.react-flow__background-pattern.cross{stroke:var(--xy-background-pattern-color-props,var(--xy-background-pattern-color,var(--xy-background-pattern-cross-color-default)))}.react-flow__controls{box-shadow:var(--xy-controls-box-shadow,var(--xy-controls-box-shadow-default));flex-direction:column;display:flex}.react-flow__controls.horizontal{flex-direction:row}.react-flow__controls-button{background:var(--xy-controls-button-background-color,var(--xy-controls-button-background-color-default));border:none;border-bottom:1px solid var(--xy-controls-button-border-color-props,var(--xy-controls-button-border-color,var(--xy-controls-button-border-color-default)));width:26px;height:26px;color:var(--xy-controls-button-color-props,var(--xy-controls-button-color,var(--xy-controls-button-color-default)));cursor:pointer;-webkit-user-select:none;user-select:none;justify-content:center;align-items:center;padding:4px;display:flex}.react-flow__controls-button svg{fill:currentColor;width:100%;max-width:12px;max-height:12px}.react-flow__edge.updating .react-flow__edge-path{stroke:#777}.react-flow__edge-text{font-size:10px}.react-flow__node.selectable:focus,.react-flow__node.selectable:focus-visible{outline:none}.react-flow__node-input,.react-flow__node-default,.react-flow__node-output,.react-flow__node-group{border-radius:var(--xy-node-border-radius,var(--xy-node-border-radius-default));width:150px;color:var(--xy-node-color,var(--xy-node-color-default));text-align:center;border:var(--xy-node-border,var(--xy-node-border-default));background-color:var(--xy-node-background-color,var(--xy-node-background-color-default));padding:10px;font-size:12px}.react-flow__node-input.selectable:hover,.react-flow__node-default.selectable:hover,.react-flow__node-output.selectable:hover,.react-flow__node-group.selectable:hover{box-shadow:var(--xy-node-boxshadow-hover,var(--xy-node-boxshadow-hover-default))}.react-flow__node-input.selectable.selected,.react-flow__node-input.selectable:focus,.react-flow__node-input.selectable:focus-visible,.react-flow__node-default.selectable.selected,.react-flow__node-default.selectable:focus,.react-flow__node-default.selectable:focus-visible,.react-flow__node-output.selectable.selected,.react-flow__node-output.selectable:focus,.react-flow__node-output.selectable:focus-visible,.react-flow__node-group.selectable.selected,.react-flow__node-group.selectable:focus,.react-flow__node-group.selectable:focus-visible{box-shadow:var(--xy-node-boxshadow-selected,var(--xy-node-boxshadow-selected-default))}.react-flow__node-group{background-color:var(--xy-node-group-background-color,var(--xy-node-group-background-color-default))}.react-flow__nodesselection-rect,.react-flow__selection{background:var(--xy-selection-background-color,var(--xy-selection-background-color-default));border:var(--xy-selection-border,var(--xy-selection-border-default))}.react-flow__nodesselection-rect:focus,.react-flow__nodesselection-rect:focus-visible,.react-flow__selection:focus,.react-flow__selection:focus-visible{outline:none}.react-flow__controls-button:hover{background:var(--xy-controls-button-background-color-hover-props,var(--xy-controls-button-background-color-hover,var(--xy-controls-button-background-color-hover-default)));color:var(--xy-controls-button-color-hover-props,var(--xy-controls-button-color-hover,var(--xy-controls-button-color-hover-default)))}.react-flow__controls-button:disabled{pointer-events:none}.react-flow__controls-button:disabled svg{fill-opacity:.4}.react-flow__controls-button:last-child{border-bottom:none}.react-flow__controls.horizontal .react-flow__controls-button{border-bottom:none;border-right:1px solid var(--xy-controls-button-border-color-props,var(--xy-controls-button-border-color,var(--xy-controls-button-border-color-default)))}.react-flow__controls.horizontal .react-flow__controls-button:last-child{border-right:none}.react-flow__resize-control{position:absolute}.react-flow__resize-control.left,.react-flow__resize-control.right{cursor:ew-resize}.react-flow__resize-control.top,.react-flow__resize-control.bottom{cursor:ns-resize}.react-flow__resize-control.top.left,.react-flow__resize-control.bottom.right{cursor:nwse-resize}.react-flow__resize-control.bottom.left,.react-flow__resize-control.top.right{cursor:nesw-resize}.react-flow__resize-control.handle{background-color:var(--xy-resize-background-color,var(--xy-resize-background-color-default));border:1px solid #fff;border-radius:1px;width:5px;height:5px;translate:-50% -50%}.react-flow__resize-control.handle.left{top:50%;left:0}.react-flow__resize-control.handle.right{top:50%;left:100%}.react-flow__resize-control.handle.top{top:0;left:50%}.react-flow__resize-control.handle.bottom{top:100%;left:50%}.react-flow__resize-control.handle.top.left,.react-flow__resize-control.handle.bottom.left{left:0}.react-flow__resize-control.handle.top.right,.react-flow__resize-control.handle.bottom.right{left:100%}.react-flow__resize-control.line{border-color:var(--xy-resize-background-color,var(--xy-resize-background-color-default));border-style:solid;border-width:0}.react-flow__resize-control.line.left,.react-flow__resize-control.line.right{width:1px;height:100%;top:0;transform:translate(-50%)}.react-flow__resize-control.line.left{border-left-width:1px;left:0}.react-flow__resize-control.line.right{border-right-width:1px;left:100%}.react-flow__resize-control.line.top,.react-flow__resize-control.line.bottom{width:100%;height:1px;left:0;transform:translateY(-50%)}.react-flow__resize-control.line.top{border-top-width:1px;top:0}.react-flow__resize-control.line.bottom{border-bottom-width:1px;top:100%}.react-flow__edge-text{fill:var(--xy-edge-label-color,var(--xy-edge-label-color-default))}:root{--bg:#f5f7fb;--paper:#fff;--paper-soft:#fafbfe;--ink:#111827;--muted:#667085;--quiet:#98a2b3;--line:#dce2ea;--line-soft:#e9edf3;--blue:#0071e3;--blue-deep:#0057b8;--blue-soft:#eaf4ff;--green:#16a36a;--green-soft:#eaf8f1;--red:#d92d3a;--amber:#b66a00;--shadow:0 28px 80px #1018281a;--shadow-soft:0 16px 48px #10182812}.student-shell{min-height:100vh;color:var(--ink);background:radial-gradient(circle at 78% 18%, #e8f3ffe6, transparent 34%), linear-gradient(180deg, #fff 0%, var(--bg) 42%, #eef3f8 100%);font-family:-apple-system,BlinkMacSystemFont,SF Pro Text,SF Pro Display,Inter,Segoe UI,sans-serif}.student-header{-webkit-backdrop-filter:saturate(180%)blur(22px);backdrop-filter:saturate(180%)blur(22px);z-index:20;background:#ffffffd1;border-bottom:1px solid #dce2eac2;justify-content:space-between;align-items:center;gap:18px;min-height:76px;padding:0 clamp(18px,4vw,54px);display:flex;position:sticky;top:0}.brand-lockup,.header-cluster,.model-chip,.soft-button,.primary-button,.secondary-button,.next-button,.step-kicker,.file-pill{align-items:center;display:inline-flex}.brand-lockup{color:var(--ink);letter-spacing:0;background:0 0;border:0;gap:12px;padding:0;font-size:22px;font-weight:750;text-decoration:none}.brand-mark{background:#fbfcf7;border:1px solid #16a36a29;border-radius:10px;place-items:center;width:42px;height:42px;display:grid;overflow:hidden;box-shadow:0 14px 28px #16a36a2e}.brand-mark img{object-fit:cover;width:100%;height:100%}.header-cluster{gap:12px}.model-chip{border:1px solid var(--line);color:#344054;background:#ffffffbd;border-radius:999px;gap:9px;min-height:38px;padding:0 15px;font-size:14px;font-weight:620}.model-chip span{background:#32d583;border-radius:50%;width:10px;height:10px}.flow-nav{grid-template-columns:repeat(3,minmax(0,1fr));gap:12px;width:min(650px,100% - 32px);margin:34px auto 28px;display:grid}.flow-nav button{min-height:66px;color:var(--muted);text-align:left;background:0 0;border:1px solid #0000;border-radius:14px;grid-template-rows:auto auto;grid-template-columns:auto minmax(0,1fr);align-items:center;column-gap:10px;padding:12px 16px;display:grid}.flow-nav span{border:1px solid var(--line);width:34px;height:34px;color:var(--muted);background:#fff;border-radius:50%;grid-row:1/3;place-items:center;font-size:14px;font-weight:760;display:grid}.flow-nav strong{color:inherit;font-size:15px;font-weight:740;line-height:1.1}.flow-nav small{color:var(--quiet);font-size:12px}.flow-nav button.active{box-shadow:var(--shadow-soft);background:#ffffffc2;border-color:#0071e32e}.flow-nav button.active span{border-color:var(--blue);background:var(--blue);color:#fff;box-shadow:0 10px 22px #0071e338}.flow-nav button.active strong{color:var(--blue)}.stage-frame{width:min(1480px,100% - 32px);margin:0 auto;padding-bottom:44px}.import-layout,.create-layout,.review-layout{gap:18px;display:grid}.import-layout{grid-template-columns:minmax(0,1.04fr) minmax(280px,.78fr);grid-template-areas:"hero preview""materials preview""details details""next next"}.create-layout{grid-template-columns:minmax(0,1.1fr) minmax(280px,.78fr);grid-template-areas:"hero concepts""ask concepts""settings settings"}.review-layout{grid-template-columns:minmax(0,1fr) clamp(300px,25vw,390px);grid-template-areas:"focus deck""graph graph";align-items:start}.hero-slab,.material-shelf,.preview-stack,.ask-slab,.concept-slab,.review-focus,.review-controls,.deck-slab,.review-graph-section,.quiet-details,.empty-stage{box-shadow:var(--shadow);-webkit-backdrop-filter:blur(20px);backdrop-filter:blur(20px);background:#ffffffd1;border:1px solid #dce2eadb;border-radius:18px}.hero-slab{grid-area:hero;min-height:420px;padding:clamp(28px,4vw,46px)}.hero-slab h1,.empty-stage h1{letter-spacing:0;max-width:620px;margin:18px 0 14px;font-size:clamp(40px,5vw,68px);line-height:1.02}.hero-slab p{max-width:520px;color:var(--muted);margin:0;font-size:18px;line-height:1.48}.step-kicker{color:var(--blue);gap:10px;font-size:15px;font-weight:720}.step-kicker svg{background:var(--blue-soft);border-radius:12px;width:44px;height:44px;padding:11px}.choice-stack,.creation-actions{gap:12px;width:min(390px,100%);margin-top:32px;display:grid}.creation-actions{grid-template-columns:minmax(0,1fr)}.primary-button,.secondary-button,.soft-button,.next-button,.file-pill,.ask-box button,.review-topline button,.grade-row button,.deck-list button{border:1px solid var(--line);border-radius:12px;justify-content:center;gap:9px;font-size:15px;font-weight:700;text-decoration:none;transition:transform .15s,border-color .15s,background .15s,box-shadow .15s}.primary-button{border-color:var(--blue-deep);background:var(--blue);color:#fff;min-height:54px;padding:0 20px;box-shadow:0 16px 30px #0071e333}.primary-button.compact{min-height:44px}.secondary-button,.soft-button,.file-pill{min-height:52px;color:var(--ink);background:#ffffffeb;padding:0 18px}.secondary-button.selected,.soft-button:hover,.secondary-button:hover,.file-pill:hover{background:var(--blue-soft);border-color:#0071e347}.primary-button:hover,.next-button:hover{transform:translateY(-1px);box-shadow:0 20px 36px #0071e33d}button:focus{outline:none}button:focus-visible,a:focus-visible,input:focus-visible,select:focus-visible,textarea:focus-visible,summary:focus-visible{outline-offset:3px;outline:3px solid #0071e32e}.primary-button:disabled,.secondary-button:disabled,.soft-button:disabled,.next-button:disabled{cursor:not-allowed;opacity:.58;box-shadow:none;transform:none}.paste-drawer{gap:12px;width:min(520px,100%);margin-top:18px;display:grid}.paste-drawer textarea{resize:vertical;min-height:150px}.file-pill{justify-self:start;min-height:40px;font-size:13px}.file-pill input{display:none}.mini-status{color:#087443;align-items:center;gap:9px;margin-top:24px;font-size:14px;font-weight:620;display:inline-flex}.material-shelf{box-shadow:var(--shadow-soft);grid-area:materials;padding:18px}.shelf-head,.concept-slab>div,.deck-slab>div:first-child,.review-topline{justify-content:space-between;align-items:center;gap:12px;display:flex}.shelf-head h2,.ask-slab h2,.concept-slab h2,.review-controls h2,.deck-slab h2{margin:0;font-size:19px;line-height:1.2}.shelf-head span,.concept-slab>div span,.deck-slab>div:first-child span{background:var(--blue-soft);min-width:32px;min-height:26px;color:var(--blue);border-radius:999px;justify-content:center;align-items:center;font-size:13px;font-weight:760;display:inline-flex}.material-list{border:1px solid var(--line-soft);border-radius:13px;margin-top:14px;display:grid;overflow:hidden}.material-list label,.all-materials label{border-bottom:1px solid var(--line-soft);background:#fff;grid-template-columns:auto auto minmax(0,1fr);align-items:center;gap:11px;min-height:58px;padding:10px 14px;display:grid}.material-list label:last-child{border-bottom:0}.material-list input,.all-materials input,.type-grid input,.advanced-grid input[type=checkbox]{accent-color:var(--blue)}.material-list span{gap:3px;min-width:0;display:grid}.material-list strong,.deck-list button{text-overflow:ellipsis;white-space:nowrap;overflow:hidden}.material-list strong{color:var(--ink);font-size:14px;font-weight:700}.material-list small{color:var(--muted);font-size:12px}.material-shelf details,.deck-slab details{margin-top:12px}.material-shelf summary,.deck-slab summary,.quiet-details summary{cursor:pointer;color:var(--blue);font-size:14px;font-weight:720}.all-materials{border:1px solid var(--line-soft);border-radius:12px;max-height:260px;margin-top:12px;display:grid;overflow:auto}.all-materials label{grid-template-columns:auto minmax(0,1fr)}.preview-stack{background:linear-gradient(140deg,#ffffffe6,#f6faffe0);grid-area:preview;min-height:520px;position:relative;overflow:hidden}.stack-card{border:1px solid var(--line);background:#fff;border-radius:18px;position:absolute;box-shadow:0 22px 60px #1018281a}.back-card{opacity:.58;height:330px;inset:90px 38px auto 84px;transform:rotate(-6deg)}.mid-card{opacity:.72;height:330px;inset:108px 34px auto 62px;transform:rotate(-2deg)}.front-card{gap:22px;min-height:330px;padding:30px;display:grid;inset:130px 32px auto}.front-card>div{justify-content:space-between;gap:12px;display:flex}.front-card span{background:var(--blue-soft);min-height:28px;color:var(--blue);white-space:nowrap;border-radius:999px;justify-content:center;align-items:center;padding:0 12px;font-size:13px;font-weight:760;line-height:1;display:inline-flex}.front-card small{color:var(--muted);font-size:14px}.front-card h2{letter-spacing:0;margin:0;font-size:clamp(27px,3vw,38px);line-height:1.18}.front-card p{color:var(--muted);margin:0;font-size:17px;line-height:1.55}.front-card strong{color:var(--blue);align-items:center;gap:8px;margin-top:auto;font-size:14px;display:inline-flex}.mini-brand-logo{object-fit:cover;border-radius:5px;width:18px;height:18px}.quiet-details{box-shadow:none;grid-area:details;padding:18px 20px}.create-settings{grid-area:settings}.advanced-grid{grid-template-columns:repeat(4,minmax(0,1fr));gap:12px;margin-top:16px;display:grid}.advanced-grid label{color:#344054;font-size:13px;font-weight:650}.advanced-grid>label:first-child,.advanced-actions,.manual-meter{align-items:center;gap:9px;display:flex}.advanced-actions,.manual-meter{color:var(--muted);flex-wrap:wrap;grid-column:1/-1;justify-content:space-between;font-size:13px}.advanced-actions a{color:var(--blue);align-items:center;gap:6px;font-weight:700;text-decoration:none;display:inline-flex}.field{gap:7px;display:grid}.field.wide{grid-column:span 2}.field span,.deck-slab details label span,.card-language-field legend{color:#596579;font-size:12px;font-weight:700}.card-language-field{border:0;grid-column:span 2;gap:7px;min-width:0;margin:0;padding:0;display:grid}.segmented-row{border:1px solid var(--line);background:var(--paper-soft);border-radius:12px;grid-template-columns:repeat(2,minmax(0,1fr));gap:6px;padding:4px;display:grid}.segmented-row button{min-height:34px;color:var(--muted);background:0 0;border:0;border-radius:9px;font-size:13px;font-weight:730}.segmented-row button.active{color:var(--blue);background:#fff;box-shadow:0 8px 20px #10182814}.segmented-row button:disabled{cursor:not-allowed;opacity:.42}.field input,.field select,.paste-drawer textarea,.ask-box input,.deck-slab textarea{border:1px solid var(--line);width:100%;min-width:0;color:var(--ink);background:#fff;border-radius:11px;outline:none;font-size:14px}.field input,.field select,.ask-box input{height:42px;padding:0 12px}.paste-drawer textarea,.deck-slab textarea{padding:12px;line-height:1.5}.field input:focus,.field select:focus,.paste-drawer textarea:focus,.ask-box input:focus,.deck-slab textarea:focus{border-color:#0071e38f;box-shadow:0 0 0 4px #0071e31f}.input-icon{display:block;position:relative}.input-icon svg{color:var(--quiet);pointer-events:none;position:absolute;top:50%;right:12px;transform:translateY(-50%)}.input-icon input{padding-right:36px}.type-grid{grid-column:span 2;grid-template-columns:repeat(3,minmax(0,1fr));gap:8px;display:grid}.type-grid label{border:1px solid var(--line-soft);background:#fff;border-radius:10px;align-items:center;gap:7px;min-height:34px;padding:0 10px;display:inline-flex}.next-button{border-color:var(--blue-deep);background:var(--blue);color:#fff;grid-area:next;justify-self:center;min-height:54px;padding:0 24px}.ask-slab{box-shadow:var(--shadow-soft);grid-area:ask;gap:14px;padding:22px;display:grid}.ask-slab p{color:var(--muted);margin:4px 0 0}.ask-box{grid-template-columns:minmax(0,1fr) 46px;gap:10px;display:grid}.ask-box button{border-color:var(--blue);background:var(--blue);color:#fff;min-height:46px}.study-answer{border:1px solid var(--line-soft);background:#fff;border-radius:14px;gap:10px;max-height:250px;padding:16px;display:grid;overflow:auto}.study-answer pre{white-space:pre-wrap;color:#475467;margin:0;font-family:inherit;font-size:14px;line-height:1.55}.knowledge-graph-panel{border:1px solid var(--line-soft);background:#fff;border-radius:18px;gap:12px;width:100%;padding:14px;display:grid}.knowledge-graph-header{justify-content:space-between;align-items:center;gap:12px;padding:0 2px;display:flex}.knowledge-graph-header strong{white-space:pre-line;font-size:16px}.knowledge-graph-header span{color:var(--muted);white-space:nowrap;font-size:13px;font-weight:650}.knowledge-graph-actions{justify-content:end;align-items:center;gap:10px;display:inline-flex}.knowledge-graph-actions button{background:var(--blue-soft);min-height:34px;color:var(--blue);font:inherit;border:1px solid #0071e338;border-radius:11px;justify-content:center;align-items:center;gap:7px;padding:0 11px;font-size:13px;font-weight:760;display:inline-flex}.knowledge-graph-actions button:hover{background:#dff0ff;border-color:#0071e357}.knowledge-graph-canvas{border:1px solid var(--line-soft);background:radial-gradient(circle at 18% 20%,#0071e314,#0000 28%),#f8fbff;border-radius:16px;height:min(460px,58vh);min-height:340px;overflow:hidden}.knowledge-graph-canvas .react-flow__pane{cursor:grab}.knowledge-graph-canvas .react-flow__controls{border:1px solid var(--line-soft);box-shadow:var(--shadow-soft);border-radius:12px;overflow:hidden}.react-flow__node.knowledge-node{border:1px solid var(--line);width:220px;color:var(--ink);background:#fff;border-radius:15px;padding:0;box-shadow:0 14px 34px #1018281a}.react-flow__node.knowledge-node-core{background:linear-gradient(#fff 0%,#edf6ff 100%);border-color:#0071e361}.react-flow__node.knowledge-node-process{border-color:#16a36a47}.react-flow__node.knowledge-node-example{border-color:#b66a0047}.react-flow__node.knowledge-node-active{z-index:10;border-color:#0071e3b8;width:292px;box-shadow:0 28px 70px #0071e338}.react-flow__node.knowledge-node-active .knowledge-node-content{gap:10px;padding:17px 18px}.react-flow__node.knowledge-node-active .knowledge-node-content span{color:var(--blue);font-size:18px;line-height:1.2}.react-flow__node.knowledge-node-active .knowledge-node-content small{-webkit-line-clamp:5;font-size:13px}.knowledge-node-content{text-align:left;gap:7px;padding:13px 14px;display:grid}.knowledge-node-content span{color:var(--ink);font-size:14px;font-weight:760;line-height:1.25}.knowledge-node-content small{color:var(--muted);-webkit-line-clamp:3;-webkit-box-orient:vertical;font-size:12px;font-weight:560;line-height:1.35;display:-webkit-box;overflow:hidden}.knowledge-node .react-flow__handle{opacity:0}.knowledge-edge path{stroke:#0071e394;stroke-width:2px}.knowledge-edge-part-of path,.knowledge-edge-depends-on path,.knowledge-edge-leads-to path{stroke:#0071e3b8}.knowledge-edge-causes path{stroke:#16a36ab3}.knowledge-edge-compares path,.knowledge-edge-example path{stroke:#b66a00b3}.react-flow__edge-textbg{fill:#ffffffeb}.react-flow__edge-text{fill:#475467;font-size:11px;font-weight:650}.graph-lesson-card{background:linear-gradient(135deg,#eaf4fff5,#fffffff5),#fff;border:1px solid #0071e32e;border-radius:17px;grid-template-columns:minmax(0,1.15fr) minmax(260px,.85fr);gap:14px;padding:18px;display:grid;box-shadow:0 18px 50px #10182817}.graph-lesson-card small{color:var(--blue);font-size:13px;font-weight:780}.graph-lesson-card h3{color:var(--ink);white-space:pre-line;margin:6px 0 10px;font-size:clamp(24px,2.2vw,34px);line-height:1.12}.graph-lesson-card p{color:#475467;white-space:pre-line;margin:0 0 9px;font-size:15px;line-height:1.55}.graph-lesson-block{align-content:start;gap:9px;display:grid}.graph-lesson-block strong{color:var(--ink);font-size:14px}.graph-relation-list{flex-wrap:wrap;gap:7px;display:flex}.graph-relation-list span{color:#475467;background:#fff;border-radius:10px;padding:7px 9px;font-size:12px;font-weight:650}.graph-lesson-actions{grid-column:1/-1;grid-template-columns:repeat(3,minmax(0,1fr));gap:10px;display:grid}.graph-lesson-actions button{border:1px solid var(--line);min-height:42px;color:var(--ink);background:#fff;border-radius:12px;justify-content:center;align-items:center;gap:7px;font-size:14px;font-weight:760;display:inline-flex}.graph-lesson-actions button:nth-child(2){border-color:var(--blue);background:var(--blue);color:#fff}.graph-lesson-actions button:disabled{cursor:not-allowed;opacity:.55}.concept-slab{box-shadow:var(--shadow-soft);grid-area:concepts;align-content:start;gap:14px;padding:22px;display:grid}.concept-slab article{border-bottom:1px solid var(--line-soft);gap:7px;padding:15px 0;display:grid}.concept-slab article:last-child{border-bottom:0}.concept-slab strong{font-size:15px}.concept-slab p{color:var(--muted);margin:0;font-size:14px;line-height:1.45}.review-focus{grid-area:focus;gap:16px;padding:clamp(22px,3vw,34px);display:grid}.review-topline{color:var(--muted);font-size:14px;font-weight:650}.review-topline button{background:#fff;min-height:38px;padding:0 12px}.study-card{border:1px solid var(--line);width:100%;min-height:clamp(360px,48vh,560px);color:var(--ink);cursor:pointer;font:inherit;background:#fff;border-radius:20px;align-content:center;gap:18px;padding:clamp(24px,4vw,46px);transition:border-color .16s,box-shadow .16s,transform .16s;display:grid;box-shadow:0 18px 50px #10182814}.study-card.answer{background:#fffdf7;min-height:clamp(360px,48vh,560px)}.study-card:hover{border-color:#0071e33d;transform:translateY(-1px);box-shadow:0 22px 58px #1018281a}.study-card small{color:var(--blue);font-weight:760}.study-card.answer small{color:var(--amber)}.study-card p{text-align:center;letter-spacing:0;white-space:pre-line;align-self:center;margin:0;font-size:clamp(29px,4vw,48px);line-height:1.17}.study-card.answer p{text-align:center;font-size:clamp(23px,2.8vw,36px);line-height:1.35}.reveal-button{border:1px solid var(--line);min-height:54px;color:var(--blue);background:#fff;border-radius:14px;justify-content:center;align-items:center;gap:9px;font-size:15px;font-weight:720;display:inline-flex}.review-answer-button{width:100%}.card-nav-row{grid-template-columns:repeat(2,minmax(0,1fr));gap:12px;display:grid}.card-nav-row button{border:1px solid var(--line);min-height:52px;color:var(--ink);background:#fff;border-radius:14px;justify-content:center;align-items:center;gap:8px;font-size:15px;font-weight:740;display:inline-flex}.card-nav-row button:last-child{border-color:var(--blue);background:var(--blue);color:#fff}.card-nav-row button:disabled{cursor:not-allowed;opacity:.55}.previous-icon{transform:rotate(180deg)}.review-graph-details{justify-items:stretch;gap:12px;width:100%;display:grid}.review-graph-section{width:100%;box-shadow:var(--shadow-soft);grid-area:graph;justify-items:stretch;gap:14px;padding:clamp(18px,2.2vw,24px);display:grid}.review-graph-details summary{border:1px solid var(--line-soft);width:fit-content;min-height:38px;color:var(--blue);cursor:pointer;background:#fff;border-radius:12px;justify-self:start;align-items:center;gap:8px;padding:0 12px;font-size:14px;font-weight:760;display:inline-flex}.review-graph-details .knowledge-graph-panel{justify-self:stretch;margin-top:12px}.review-graph-section .knowledge-graph-canvas{width:100%;height:min(640px,72vh);min-height:440px}.review-stats{flex-wrap:wrap;gap:8px;display:flex}.deck-stats{margin-top:-2px}.review-stats span{background:var(--paper-soft);color:var(--muted);border-radius:999px;padding:7px 10px;font-size:13px}.deck-slab{box-shadow:var(--shadow-soft);grid-area:deck;align-content:start;gap:16px;padding:22px;display:grid}.deck-list{gap:8px;display:grid}.deck-list button{color:#475467;text-align:left;background:#fff;justify-content:start;align-items:center;min-height:46px;padding:0 13px;display:flex;position:relative}.deck-card-title{text-overflow:ellipsis;white-space:nowrap;min-width:0;position:relative;overflow:hidden}.deck-list button.mastered{border-color:var(--line-soft);color:var(--quiet);background:#f8fafc}.deck-list button.mastered .deck-card-title{text-decoration-line:line-through;text-decoration-color:currentColor;text-decoration-thickness:2px}.deck-list button.mastered .deck-card-title:after{content:"";transform-origin:0;background:currentColor;border-radius:999px;height:2px;animation:.22s forwards strike-in;position:absolute;top:50%;left:0;right:0;transform:scaleX(0)}.deck-undo-label{color:var(--blue);white-space:nowrap;align-items:center;gap:4px;margin-left:auto;font-size:12px;font-weight:760;display:inline-flex}.deck-list button.active{background:var(--blue-soft);color:var(--blue);border-color:#0071e352}.mastered-action{background:var(--green-soft);color:#087443;border-color:#16a36a38}.review-complete{border:1px solid var(--line);min-height:clamp(360px,48vh,560px);color:var(--ink);text-align:center;background:#fff;border-radius:20px;align-content:center;place-items:center;gap:12px;padding:clamp(24px,4vw,46px);display:grid;box-shadow:0 18px 50px #10182814}.review-complete svg{color:var(--green)}.review-complete h2{margin:0;font-size:clamp(30px,4vw,48px);line-height:1.12}.review-complete p{max-width:520px;color:var(--muted);margin:0;font-size:16px;line-height:1.5}.deck-slab details label{gap:6px;margin-top:12px;display:grid}.deck-slab textarea{resize:vertical;min-height:92px}.tag-row{flex-wrap:wrap;gap:7px;margin-top:12px;display:flex}.tag-row span{color:#475467;background:#eef2f6;border-radius:8px;align-items:center;gap:6px;min-height:28px;padding:0 9px;font-size:12px;display:inline-flex}.deck-action-row,.export-row{gap:10px;display:grid}.deck-action-button{width:100%}.paywall-panel{border:1px solid var(--line-soft);background:#fff;border-radius:16px;gap:12px;padding:16px;display:grid}.paywall-panel.locked{background:linear-gradient(#fff 0%,#f4f9ff 100%);border-color:#0071e33d}.paywall-heading,.paywall-heading span,.billing-email-field span,.pack-list button,.admin-header,.admin-hero,.admin-metrics,.admin-panel-head,.admin-config{align-items:center;display:flex}.paywall-heading{justify-content:space-between;gap:10px}.paywall-heading span{color:var(--ink);gap:8px;font-size:14px;font-weight:760}.paywall-heading svg{color:var(--blue)}.paywall-heading strong{color:var(--blue);font-size:13px}.paywall-panel p{color:var(--muted);margin:0;font-size:13px;line-height:1.45}.billing-email-field{gap:7px;display:grid}.billing-email-field>span:first-child{color:#596579;font-size:12px;font-weight:700}.billing-email-field>span:last-child{border:1px solid var(--line);background:#fff;border-radius:11px;gap:8px;height:42px;padding:0 11px}.billing-email-field svg{color:var(--quiet)}.billing-email-field input{width:100%;min-width:0;color:var(--ink);font:inherit;border:0;outline:0;font-size:14px}.paywall-primary{width:100%}.pack-list{gap:8px;display:grid}.pack-list button{border:1px solid var(--line);min-height:48px;color:var(--ink);font:inherit;background:#fff;border-radius:12px;justify-content:space-between;gap:10px;padding:0 12px}.pack-list button.featured{border-color:#0071e34d;box-shadow:0 12px 28px #0071e31a}.pack-list button:disabled{cursor:not-allowed;opacity:.55}.pack-list button span{align-items:baseline;gap:6px;font-size:13px;font-weight:700;display:inline-flex}.pack-list button span strong{font-size:18px}.pack-list button em{color:var(--blue);font-style:normal;font-weight:800}.pack-list small{color:var(--muted);font-size:12px;line-height:1.4}.export-row{grid-template-columns:1fr 1fr}.admin-shell{min-height:100vh;color:var(--ink);background:radial-gradient(circle at 84% 14%, #e8f3ffe6, transparent 30%), linear-gradient(180deg, #fff 0%, var(--bg) 46%, #eef3f8 100%);padding:0 clamp(18px,4vw,54px) 54px;font-family:-apple-system,BlinkMacSystemFont,SF Pro Text,SF Pro Display,Inter,Segoe UI,sans-serif}.admin-header{justify-content:space-between;min-height:76px}.admin-hero{justify-content:space-between;gap:24px;max-width:1180px;margin:34px auto 18px}.admin-hero h1{letter-spacing:0;max-width:680px;margin:0 0 12px;font-size:clamp(40px,5vw,64px);line-height:1.02}.admin-hero p{max-width:620px;color:var(--muted);margin:0;font-size:18px;line-height:1.48}.admin-token-card,.grant-panel,.accounts-panel,.activity-panel,.admin-metrics article{box-shadow:var(--shadow-soft);-webkit-backdrop-filter:blur(20px);backdrop-filter:blur(20px);background:#ffffffd6;border:1px solid #dce2eadb;border-radius:18px}.admin-token-card{gap:12px;width:min(360px,100%);padding:18px;display:grid}.admin-error{color:#a63a45;background:#fff1f3;border:1px solid #ffd0d5;border-radius:12px;max-width:1180px;margin:0 auto 14px;padding:11px 14px;font-size:14px;font-weight:650}.admin-metrics{grid-template-columns:repeat(4,minmax(0,1fr));gap:12px;max-width:1180px;margin:0 auto 18px;display:grid}.admin-metrics article{align-items:start;min-height:100px;padding:18px;display:grid}.admin-metrics article svg{color:var(--blue)}.admin-metrics article span{color:var(--muted);font-size:13px;font-weight:700}.admin-metrics article strong{margin-top:10px;font-size:30px;line-height:1;display:block}.admin-grid{grid-template-columns:minmax(280px,.76fr) minmax(0,1.24fr);grid-template-areas:"grant accounts""activity accounts";gap:18px;max-width:1180px;margin:0 auto;display:grid}.grant-panel,.accounts-panel,.activity-panel{align-content:start;gap:14px;padding:22px;display:grid}.grant-panel{grid-area:grant}.accounts-panel{grid-area:accounts}.activity-panel{grid-area:activity}.grant-panel h2,.accounts-panel h2,.activity-panel h2{margin:0;font-size:20px}.admin-config{color:var(--muted);flex-wrap:wrap;gap:8px;font-size:12px;font-weight:700}.admin-config span{background:var(--paper-soft);border-radius:999px;padding:6px 8px}.admin-panel-head{justify-content:space-between;gap:12px}.admin-panel-head span{background:var(--blue-soft);color:var(--blue);border-radius:999px;padding:6px 10px;font-size:13px;font-weight:800}.account-table,.activity-list{gap:8px;display:grid}.account-table article{border:1px solid var(--line-soft);background:#fff;border-radius:13px;grid-template-columns:auto minmax(0,1fr) auto;align-items:center;gap:8px 10px;min-height:62px;padding:12px;display:grid}.account-table article svg{color:var(--blue)}.account-table article strong{text-overflow:ellipsis;white-space:nowrap;overflow:hidden}.account-table article>span{color:var(--blue);font-weight:850}.account-table article small{color:var(--muted);grid-column:2/4;font-size:12px}.activity-list article{border-bottom:1px solid var(--line-soft);gap:4px;padding:12px 0;display:grid}.activity-list article:last-child{border-bottom:0}.activity-list span,.activity-list small,.empty-admin-state{color:var(--muted);font-size:13px}.empty-stage{text-align:center;place-items:center;min-height:520px;padding:32px;display:grid}.warning-strip{flex-wrap:wrap;gap:8px;width:min(1200px,100% - 32px);margin:-22px auto 36px;display:flex}.warning-strip span{color:#a63a45;background:#fff1f3;border:1px solid #ffd0d5;border-radius:10px;padding:9px 12px;font-size:13px}.spin{animation:.9s linear infinite spin}@keyframes spin{to{transform:rotate(360deg)}}@keyframes strike-in{to{transform:scaleX(1)}}@media (width<=980px){.student-header{flex-direction:column;align-items:flex-start;padding-block:14px}.header-cluster{justify-content:space-between;width:100%}.flow-nav{gap:8px;margin-top:18px}.flow-nav button{text-align:center;grid-template-columns:1fr;justify-items:center}.flow-nav span{grid-row:auto}.flow-nav small{display:none}.import-layout,.create-layout,.review-layout,.admin-grid{grid-template-columns:minmax(0,1fr);grid-template-areas:none}.hero-slab,.material-shelf,.preview-stack,.ask-slab,.concept-slab,.review-focus,.review-controls,.deck-slab,.review-graph-section,.quiet-details,.next-button,.grant-panel,.accounts-panel,.activity-panel{grid-area:auto}.admin-hero{flex-direction:column;align-items:stretch}.admin-token-card{width:100%}.admin-metrics{grid-template-columns:repeat(2,minmax(0,1fr))}.preview-stack{min-height:430px}.advanced-grid{grid-template-columns:minmax(0,1fr)}.field.wide,.type-grid,.card-language-field{grid-column:auto}.type-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}@media (width<=640px){.stage-frame,.warning-strip{width:min(100% - 20px,1200px)}.brand-lockup{font-size:19px}.model-chip{white-space:nowrap;text-overflow:ellipsis;max-width:190px;overflow:hidden}.hero-slab{min-height:auto;padding:24px}.hero-slab h1{font-size:42px}.hero-slab p{font-size:16px}.front-card{padding:22px;inset:88px 18px auto}.mid-card{inset:70px 24px auto 34px}.back-card{inset:54px 32px auto 48px}.grade-row,.export-row,.admin-metrics{grid-template-columns:minmax(0,1fr)}.admin-shell{padding-inline:18px}.admin-header{gap:14px}.admin-hero h1{font-size:42px}}