.source-clues{color:#203f50;background:#f4f8fc;border:2px solid #b4c9db;border-radius:16px;padding:12px}.source-clues h3{margin:0 0 12px}.source-clues__sources{gap:8px;display:grid}.source-clues__sources details{background:#fff;border-radius:12px;padding:8px}.source-clues summary{cursor:pointer;min-height:44px;font-weight:700}.source-clues img{object-fit:contain;width:100%;height:auto;max-height:220px;display:block}.source-clues__sources p{margin:8px 0;font-size:1rem;line-height:1.5}.source-clues__choices{grid-template-columns:repeat(2,minmax(0,1fr));gap:8px;display:grid}.source-clues button{white-space:normal;max-width:100%;min-height:44px}.source-clues__choices button[aria-pressed=true]{background:#fff1d7;outline:3px solid #8a531d}.source-clues .learn-actions{flex-wrap:wrap;gap:8px;display:flex}.source-clues [data-clue-feedback]{line-height:1.45}.source-clues h4{font-size:1.15rem;line-height:1.4}.source-clues>details{margin-top:12px}.source-clues .learn-actions>button{flex:calc(50% - 4px);padding:8px 6px}.source-clues .learn-actions>[data-clue-next]{flex-basis:100%}.three-addends{color:#163e31;background:#f7fbf6;border:2px solid #b8d5c3;border-radius:16px;padding:12px}.three-addends h3{margin:0 0 8px}.three-addends__origin{font-size:.88rem;line-height:1.4}.three-addends__groups{grid-template-columns:repeat(3,minmax(0,1fr));gap:6px;display:grid}.three-addends .three-addends__group{color:#163e31;white-space:normal;overflow-wrap:anywhere;background:#fff;border:2px solid #789b88;border-radius:12px;flex-direction:column;justify-content:flex-start;align-items:center;gap:6px;min-width:0;min-height:96px;padding:8px 4px;font-size:.9rem;display:flex}.three-addends__group[aria-pressed=true]{outline-offset:-4px;background:#fff4d9;outline:3px solid #b66c16}.three-addends .three-addends__group:disabled{opacity:1}.three-addends__tokens{flex-wrap:wrap;justify-content:center;gap:3px;max-width:100%;display:flex}.three-addends__token{place-items:center;width:17px;height:19px;font-size:17px;font-style:normal;display:grid}.three-addends__token.source-0{color:#176b54}.three-addends__token.source-1{color:#6847a5}.three-addends__token.source-2{color:#9a570b}.three-addends .learn-actions{flex-wrap:wrap;gap:8px;display:flex}.three-addends .learn-actions button{white-space:normal;max-width:100%;min-height:44px}.three-addends [data-three-status]{min-height:2.6em;line-height:1.4}.three-addends__group strong{font-size:.82rem;line-height:1.3}.three-addends__group em{font-size:.8rem}.learn-math-model.data-sort{max-width:520px;margin:12px auto;padding:10px}.data-sort .data-sort-guide,.data-sort .data-sort-key{margin:.35rem 0;font-size:1rem;line-height:1.4}.data-sort-tray{grid-template-columns:repeat(auto-fit,minmax(44px,1fr));gap:4px;display:grid}.data-sort .data-sort-tray button,.data-sort .data-sort-item{color:#253b45;background:#fff8e4;border:1px solid #7a6952;border-radius:8px;flex-direction:column;justify-content:center;align-items:center;gap:2px;min-height:44px;padding:2px;display:flex}.learn-math-model.data-sort svg{fill:#355e71;flex:none;width:22px;height:22px}.data-sort-tray button span{font-size:.7rem;line-height:1.1}.data-sort .data-sort-tray button.is-recorded{background:#e0f0e9}.data-sort button[aria-pressed=true]{outline-offset:1px;outline:3px solid #936c00}.data-sort-rows{gap:6px;display:grid}.data-sort-row{background:#f7fbfd;border:1px solid #728b94;border-radius:8px;padding:4px 8px}.data-sort-label{align-items:center;gap:6px;min-height:44px;display:flex}.data-sort .data-sort-label button{text-align:left;flex:1;min-height:44px;padding:5px 8px;font-size:.95rem}.data-sort-marks{border-left:2px solid #375d6c;flex-wrap:wrap;align-items:center;gap:0;min-height:28px;padding-left:4px;display:flex}.data-sort-marks>span[role=img]{text-align:center;width:20px;font-size:20px}.data-sort-marks .is-selected{border-radius:4px;outline:2px solid #936c00}.data-sort-zero{font-size:.9rem}.data-sort-controls{grid-template-columns:1fr 1fr;gap:5px;margin-top:8px;display:grid}.data-sort .data-sort-controls button{min-height:44px;padding:5px;font-size:.9rem}.data-sort-controls button:first-child{grid-column:1/-1}.data-sort [data-data-status]{margin:.5rem 0 0;font-size:.95rem;line-height:1.3}.data-sort button:focus-visible{outline-offset:2px;outline:3px solid #735000}.unit-measure{color:#193449;background:#f4f8fb;border:2px solid #acc4d1;border-radius:18px;max-width:35rem;margin:1rem auto;padding:.8rem}.unit-measure svg{width:100%;height:auto;display:block}.unit-measure svg text{fill:#193449;font:14px system-ui,sans-serif}.unit-measure .unit-guide{align-items:center;gap:.4rem;font-size:.85rem;display:flex}.unit-measure .unit-guide svg{flex:none;width:32px}.unit-measure .unit-tools{grid-template-columns:1fr .6fr 1fr;gap:.35rem;display:grid}.unit-measure .unit-repairs{flex-wrap:wrap;gap:.35rem;margin-top:.35rem;display:flex}.learn-math-model.unit-measure button{color:#17374a;touch-action:manipulation;background:#fff;border:1px solid #617e8f;border-radius:10px;min-width:44px;min-height:44px;margin:0;padding:.4rem .55rem;font-size:.9rem}.unit-measure .unit-reset{margin-top:.35rem!important}.unit-measure [data-unit-status]{min-height:2.6em;font-size:.9rem;line-height:1.4}.unit-measure .learn-fine{font-size:.8rem;line-height:1.35}.unit-measure button:focus-visible{outline-offset:2px;outline:3px solid #bc6a18}.unit-measure button:disabled{opacity:.45}@media (width<=400px){.learn-math-model.unit-measure{padding:.5rem}.unit-measure [data-unit-status]{font-size:.85rem}}.learn-math-model.length-order,.learn-math-model.length-clues{color:#193449;background:#f4f5fc;border:2px solid #c4c9df;border-radius:18px;padding:12px}.learn-math-model.length-order p,.learn-math-model.length-clues p{margin:8px 0;line-height:1.35}.length-order [data-length-rows]{gap:8px;margin:12px 0;padding:0;list-style:none;display:grid}.length-order .length-strip-card{background:#fff;border:1px solid #c4c9df;border-radius:10px;margin:0;padding:5px 8px;list-style:none}.length-order .length-strip-heading{justify-content:space-between;align-items:center;gap:6px;display:flex}.length-order .length-strip-heading strong{font-size:1rem}.length-order .length-strip-card svg{width:100%;height:auto;display:block}.length-order .length-strip-moves{gap:6px;display:flex}.length-order .length-strip-moves button{color:#193449;background:#fff;border:2px solid #35466a;border-radius:10px;width:44px;height:44px;min-height:44px;margin:0;padding:0;font-size:1.4rem}.length-order .length-order-tools{grid-template-columns:minmax(0,1fr) minmax(0,1fr) 44px;gap:8px;display:grid}.length-order .length-order-tools button{color:#193449;background:#fff;border:2px solid #35466a;border-radius:10px;min-width:0;min-height:44px;padding:8px 4px;font-size:.9rem;line-height:1.2}.length-order button:focus-visible{outline-offset:3px;outline:3px solid #a50}.length-order .learn-fine,.length-clues .learn-fine{font-size:.82rem}.learn-math-model.clock-workshop{color:#193449;background:#eef5fb;border:2px solid #b8cbda;border-radius:18px;padding:12px}.clock-workshop .clock-picture{max-width:260px;margin:auto}.clock-workshop .clock-picture svg{width:100%;height:auto;display:block}.learn-math-model.clock-workshop p{margin:10px 0;line-height:1.35}.clock-workshop .clock-key{font-size:.85rem}.clock-workshop .clock-controls{grid-template-columns:repeat(2,minmax(0,1fr));gap:8px;display:grid}.clock-workshop .clock-controls button,.clock-workshop button[data-clock-listen]{color:#193449;background:#fff;border:2px solid #25405c;border-radius:12px;min-width:0;min-height:44px;padding:8px 5px;font-size:.9rem;line-height:1.2}.clock-workshop .clock-digital{text-align:center;font-variant-numeric:tabular-nums;font-size:1.25rem;font-weight:700}.clock-workshop.clock-static .clock-digital{font-size:2.5rem}.clock-workshop [data-clock-listen][hidden]{display:none}.clock-workshop button:focus-visible{outline-offset:3px;outline:3px solid #a50}.learn-math-model.addition-bridge{overflow-wrap:anywhere;color:#193449;background:#f4f8fb;border:2px solid #bacbda;border-radius:18px;padding:16px}.addition-bridge .bridge-equations{flex-direction:column;gap:5px;font-size:1.2rem;display:flex}.addition-bridge .bridge-cells{grid-template-columns:repeat(10,minmax(0,1fr));gap:3px;max-width:480px;margin:16px 0;display:grid}.addition-bridge .bridge-cell{aspect-ratio:1;border:2px solid #3a5365;border-radius:5px;justify-content:center;align-items:center;font-size:clamp(13px,2.5vw,22px);line-height:1;display:flex}.addition-bridge .bridge-known{color:#fff;background:#193449}.addition-bridge .bridge-added{color:#402700;background:#f8d785}.addition-bridge .bridge-open{color:#3a5365;background:#fff}.addition-bridge .bridge-jumps,.addition-bridge .bridge-tools{grid-template-columns:repeat(3,minmax(0,1fr));gap:8px;margin:10px 0;display:grid}.addition-bridge .bridge-jumps button,.addition-bridge .bridge-tools button{color:#fff;background:#193449;border:2px solid #193449;border-radius:12px;min-width:0;min-height:44px;margin:0;padding:8px 4px;font-size:.9rem;line-height:1.25}.addition-bridge .bridge-tools button{color:#193449;background:#fff}.addition-bridge button:disabled{opacity:.5}.addition-bridge button:focus-visible{outline-offset:3px;outline:3px solid #a50}.addition-bridge [data-bridge-status]{min-height:0}.learn-math-model.addition-bridge p{margin:8px 0;line-height:1.35}.addition-bridge .learn-fine{font-size:.8rem}.addition-bridge [data-bridge-progress]{font-size:.95rem}@media (width<=420px){.learn-math-model.addition-bridge{padding:10px}.addition-bridge .bridge-tools{grid-template-columns:1fr 1fr}.addition-bridge [data-bridge-check]{grid-column:1/-1}.addition-bridge .bridge-cell{border-width:1px}}.collection-comparison{min-width:0;max-width:100%}.collection-comparison .collection-groups{grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:.5rem;display:grid}.collection-comparison .collection-group{border:2px solid #bfd2c4;border-radius:1rem;min-width:0;padding:.4rem}.collection-comparison .collection-group h4,.collection-comparison .collection-group>p{margin:.2rem 0 .5rem}.collection-comparison .collection-objects{flex-wrap:wrap;align-content:flex-start;gap:4px;min-height:100px;margin:0;padding:0;list-style:none;display:flex}.collection-comparison .collection-objects li{margin:0;padding:0;list-style:none}.collection-comparison .collection-objects--compact{justify-content:flex-start}.collection-comparison .collection-objects--spread{justify-content:space-between;row-gap:12px}.collection-comparison .collection-objects--scatter li:nth-child(3n+1){margin-top:9px}.collection-comparison .collection-objects--scatter li:nth-child(3n+2){margin-bottom:9px}.collection-comparison .collection-objects button,.collection-comparison .collection-static{color:#213d31;box-sizing:border-box;background:#fffef6;border:2px solid #c1ccbe;border-radius:.7rem;justify-content:center;align-items:center;width:44px;height:44px;padding:0;display:inline-flex;position:relative}.collection-comparison .collection-objects button[aria-pressed=true]{border-color:#624aa8;outline:2px solid #b7a4e4}.collection-comparison .collection-objects button:disabled{opacity:1;color:inherit;cursor:default;background:#e0eadc;border-color:#507956}.collection-comparison .collection-icon{font-family:Arial,sans-serif;font-size:29px;line-height:1}.collection-comparison .collection-icon--star{color:#906500}.collection-comparison .collection-icon--heart{color:#a33b65}.collection-comparison .collection-icon--square{color:#375a96;font-size:24px}.collection-comparison .collection-icon--circle{color:#286754;font-size:21px}.collection-comparison .collection-pair{color:#183d2c;background:#fff;border:1px solid #507956;border-radius:50%;width:19px;height:19px;font-size:12px;font-weight:800;line-height:18px;position:absolute;top:-5px;right:-3px}.collection-comparison .collection-empty{justify-content:center;align-items:center;min-height:100px;font-weight:700;display:flex}.collection-comparison>.learn-actions{grid-template-columns:repeat(2,minmax(0,1fr));align-items:stretch;gap:8px;display:grid}.collection-comparison>.learn-actions button{white-space:normal;width:100%;max-width:100%;min-height:44px;padding:8px;font-size:.88rem}.collection-comparison [data-collection-status]{background:#f0f5e8;border-radius:.8rem;padding:.8rem}.collection-comparison .collection-static{background:0 0;border-color:#0000}.learn-presentation-example{background:#f2f7ee;border:1px solid #c6d8c8;border-radius:18px;max-width:500px;margin:18px 0;padding:12px}.learn-presentation-example svg{width:100%;height:auto;display:block}.learn-presentation-example figcaption{color:#294b3b;margin-top:10px;font-size:1rem;line-height:1.5}.learn-listening-passage{background:#f4f8ef;border:1px solid #b8ccb9;border-radius:14px;min-width:0;margin:16px 0;padding:16px}.learn-listening-passage blockquote{border-left:4px solid #39704d;margin:12px 0;padding:0 0 0 14px;font-size:1.1rem;line-height:1.65}.learn-listening-passage p{overflow-wrap:anywhere}.learn-listening-passage summary{cursor:pointer;min-height:28px;padding:8px 0}.learn-shape-classifier{min-width:0}.learn-shape-classifier svg{width:100%;max-width:400px;height:auto;margin:0 auto;display:block}.learn-shape-classifier select{box-sizing:border-box;width:100%;min-width:0;max-width:100%}.learn-shape-classifier .learn-actions{flex-wrap:wrap;gap:8px;display:flex}.learn-shape-classifier .learn-actions button{min-height:44px;padding:10px 12px}.learn-shape-classifier [data-class-status]{background:#edf4e9;border-left:4px solid #367258;padding:12px}.learn-fold-symmetry{min-width:0}.learn-fold-symmetry svg{width:100%;max-width:420px;height:auto;margin:0 auto;display:block}.learn-fold-symmetry select{box-sizing:border-box;width:100%;min-width:0;max-width:100%}.learn-fold-symmetry .learn-actions{flex-wrap:wrap;gap:8px;display:flex}.learn-fold-symmetry .learn-actions button{min-height:44px;padding:10px 12px}.learn-fold-symmetry [data-fold-status]{background:#edf4e9;border-left:4px solid #367258;padding:12px}.learn-geometry-lines{contain:inline-size;background:#f2f7ed;border:1px solid #c0d4bd;border-radius:14px;min-width:0;padding:14px}.learn-geometry-lines svg{width:100%;max-width:440px;height:auto;margin:auto;display:block}.learn-geometry-lines .learn-actions{flex-wrap:wrap;gap:8px;display:flex}.learn-geometry-lines .learn-actions button{min-height:44px;padding:10px 12px}.learn-geometry-lines button[aria-pressed=true]{box-shadow:inset 0 0 0 2px #347348}.learn-geometry-lines [data-geometry-status]{min-height:3em}@media print{.learn-geometry-lines [data-geometry-controls],.learn-geometry-lines [data-geometry-status]{display:none}}.learn-case-model{background:#f0f7ee;border:1px solid #b9cdbc;border-radius:14px;min-width:0;margin:18px 0;padding:16px}.learn-case-message{text-transform:none;letter-spacing:.01em;overflow-wrap:normal;background:#fff;border:1px solid #c4d9c7;border-radius:9px;padding:12px;font-family:Kidipedia Andika,Georgia,serif;font-size:clamp(1.7rem,5vw,2.5rem);font-weight:400;line-height:1.7}.learn-case-message .is-capital{text-underline-offset:5px;-webkit-text-decoration:underline #b27a26;text-decoration:underline #b27a26;text-decoration-thickness:2px}.learn-case-model fieldset{border:1px solid #afc8b5;border-radius:10px;min-width:0;margin:14px 0;padding:12px}.learn-case-model legend{font-weight:700}.learn-case-choices{flex-wrap:wrap;gap:8px;display:flex}.learn-case-model .learn-case-choices button{min-width:44px;padding:9px 13px;font-size:1.25rem}.learn-case-marks{gap:8px;display:grid}.learn-case-model .learn-case-marks button{text-align:left;align-items:center;gap:14px;padding:9px 12px;display:flex}.learn-case-marks strong{text-align:center;min-width:22px;font-family:Kidipedia Andika,Georgia,serif;font-size:2rem}.learn-case-model button[aria-pressed=true]{box-shadow:inset 0 0 0 2px #36764a}.learn-case-model [data-case-status]{min-height:3em}@media print{.learn-case-model [data-case-controls],.learn-case-model [data-case-status]{display:none!important}}.learn-line-plot{contain:inline-size;min-width:0}.learn-line-plot figure{margin:0}.learn-line-plot figcaption{margin:0 0 12px;font-size:1rem;font-weight:700}.learn-line-plot-scroll{overscroll-behavior-x:contain;background:#fff;border:1px solid #afc8b8;border-radius:8px;max-width:100%;overflow-x:auto}.learn-line-plot-scroll:focus-visible{outline-offset:3px;outline:3px solid #99610b}.learn-line-plot .learn-line-plot-scroll svg{width:100%;min-width:600px;display:block;overflow:hidden}.learn-line-plot table{border-collapse:collapse;max-width:100%;margin-top:10px;font-size:.95rem}.learn-line-plot th,.learn-line-plot td{text-align:center;border:1px solid #afc8b8;padding:6px 10px}.learn-plot-places{grid-template-columns:repeat(3,minmax(0,1fr));gap:7px;display:grid}.learn-line-plot .learn-plot-places button{min-height:44px;padding:10px 4px;font-size:1rem;line-height:1.2}.learn-plot-next{font-size:1.05rem}.learn-line-plot [data-plot-status]{min-height:3em}@media print{.learn-plot-places,.learn-line-plot [data-plot-controls],.learn-line-plot [data-plot-status]{display:none!important}.learn-line-plot-scroll{overflow:visible}.learn-line-plot .learn-line-plot-scroll svg{width:100%;min-width:0}}.learn-fraction-area,.learn-scaling,.learn-fraction-tape,.learn-decimal-grid,.learn-unit-cubes,.learn-coordinate-grid,.learn-shape-hierarchy,.learn-expression{contain:inline-size;min-width:0}.learn-fraction-area svg{width:100%;max-width:400px;margin:0 auto;display:block}.learn-scaling svg,.learn-fraction-tape svg{width:100%;max-width:600px;margin:0 auto;display:block}.learn-decimal-grid svg{width:100%;max-width:520px;margin:0 auto;display:block}.learn-unit-cubes svg{width:100%;max-width:380px;max-height:340px;margin:0 auto;display:block}.learn-coordinate-grid svg{width:100%;max-width:420px;margin:0 auto;display:block}.learn-fa-controls{grid-template-columns:repeat(2,minmax(0,1fr));gap:10px;margin:10px 0;display:grid}.learn-fa-controls fieldset{background:#fff;border:1px solid #b8d5bf;border-radius:10px;min-width:0;margin:0;padding:8px 10px}.learn-fa-controls legend{font-size:.9rem;font-weight:700}.learn-fa-controls label,.learn-tape-controls label,.learn-cube-controls label,.learn-dg-controls label,.learn-scaling>label,.learn-shape-hierarchy>label{flex-wrap:wrap;align-items:center;gap:8px;margin:6px 0;font-size:.95rem;display:flex}.learn-fraction-area select,.learn-fraction-tape select,.learn-unit-cubes select,.learn-scaling select,.learn-decimal-grid select,.learn-shape-hierarchy select{min-width:64px;min-height:44px;font-size:1rem}.learn-scaling input[type=range],.learn-unit-cubes input[type=range],.learn-decimal-grid input[type=range]{width:100%;min-height:44px}.learn-tape-controls,.learn-cube-controls{flex-wrap:wrap;align-items:center;gap:4px 16px;margin:10px 0;display:flex}.learn-cube-controls label:last-child{flex-basis:100%}.learn-dg-controls label{grid-template-columns:1fr auto;gap:2px 10px;display:grid}.learn-dg-controls output{text-align:right;min-width:3.5em;font-weight:700}.learn-grid-moves{grid-template-columns:repeat(4,minmax(0,1fr));gap:8px;margin:10px 0;display:grid}.learn-grid-moves button{min-height:44px;padding:8px 4px;font-size:.95rem}.learn-hierarchy-layout{grid-template-columns:minmax(0,.8fr) minmax(0,1.4fr);align-items:center;gap:12px;display:grid}.learn-hierarchy-layout>div:only-child{grid-column:1/-1}.learn-hierarchy-layout svg{width:100%;max-width:420px;margin:0 auto;display:block}.learn-hierarchy-figure svg,[data-hierarchy-figure] svg{max-width:220px}.learn-expr{overflow-wrap:anywhere;color:#173c2f;margin:8px 0;font-size:clamp(1.25rem,5vw,1.7rem);font-weight:700;line-height:1.9}.learn-expr-group{border-radius:8px;padding:2px 3px}.learn-expr-depth-1{background:#fbe3b6}.learn-expr-depth-2{background:#cfe6f3}.learn-expr-depth-3{background:#e2d9f3}.learn-expr-group b{color:#7a4306}.learn-expr-op{white-space:pre}.learn-expr-steps{margin:10px 0;padding-left:1.4em}.learn-expr-steps li{margin:4px 0}.learn-expr-steps li span{min-width:8em;font-weight:700;display:inline-block}.learn-expr-steps code{overflow-wrap:anywhere;background:#fff;border-radius:6px;padding:2px 6px;font-size:1rem}.learn-expr-compare{border-top:1px dashed #9cb8a6;margin-top:12px;padding-top:10px}@media (width<=560px){.learn-hierarchy-layout{grid-template-columns:1fr}.learn-grid-moves{grid-template-columns:repeat(2,minmax(0,1fr))}.learn-fa-controls{grid-template-columns:1fr}}@media print{.learn-fa-controls,.learn-tape-controls,.learn-cube-controls,.learn-dg-controls,.learn-grid-moves,.learn-scaling>label,.learn-shape-hierarchy>label,[data-expr-next]{display:none!important}}.learn-fraction-line{contain:inline-size;min-width:0}.learn-fraction-line svg{width:100%;max-width:620px;margin:0 auto;display:block}.learn-fnl-controls{flex-wrap:wrap;align-items:center;gap:4px 16px;margin:10px 0;display:flex}.learn-fnl-controls label{flex-wrap:wrap;align-items:center;gap:8px;margin:6px 0;font-size:.95rem;display:flex}.learn-fnl-controls select{min-width:64px;min-height:44px;font-size:1rem}.learn-fnl-controls input[type=range]{width:100%;min-width:180px;min-height:44px}.learn-signed-plane,.learn-double-line,.learn-data-display,.learn-area-figure,.learn-fraction-divide,.learn-algebra,.learn-number-sense{contain:inline-size;min-width:0}.learn-signed-plane svg,.learn-double-line svg,.learn-data-display svg,.learn-fraction-divide svg,.learn-algebra svg,.learn-number-sense svg{width:100%;max-width:600px;margin:0 auto;display:block}.learn-signed-plane.learn-signed-plane svg{max-width:420px}.learn-signed-line svg{max-width:600px}.learn-area-figure svg{width:100%;max-width:460px;max-height:380px;margin:0 auto;display:block}.learn-number-sense svg{max-width:460px}.learn-area-figure label{flex-wrap:wrap;align-items:center;gap:8px;margin:8px 0;display:flex}.learn-area-figure input[type=range]{flex:180px;min-height:44px}.learn-data-display [aria-pressed=true]{outline-offset:2px;outline:3px solid #176b54}.learn-signed-plane .learn-grid-moves button,.learn-data-display button,.learn-double-line button,.learn-algebra button,.learn-number-sense button,.learn-fraction-divide button,.learn-area-figure button{min-height:44px}@media print{.learn-signed-plane .learn-grid-moves,.learn-signed-plane .learn-actions,[data-g6-model] .learn-actions,[data-g6-model] label{display:none!important}}.learn-hero,.learn-panel,.learn-resume,.learn-subject{box-sizing:border-box;background:#fffdf7;border:1px solid #dedfd7;border-radius:22px}.learn-hero{color:#243d32;background:linear-gradient(115deg,#edf6ec,#fff9e7);justify-content:space-between;gap:24px;margin:12px 0 24px;padding:clamp(20px,4vw,42px);display:flex}.learn-hero>div{max-width:760px}.learn-hero h1{letter-spacing:-.025em;margin:10px 0 14px;font-size:clamp(1.8rem,3.4vw,2.7rem);line-height:1.15}.learn-hero p{max-width:660px;font-size:1.05rem;line-height:1.6}.learn-hero img{object-fit:cover;border:6px solid #fff8;border-radius:50%;align-self:center;width:128px;height:128px}.learn-eyebrow{text-transform:uppercase;letter-spacing:.08em;color:#50705d;font-size:.76rem;font-weight:800;display:block}.learn-heading{justify-content:space-between;align-items:center;gap:20px;margin:0 0 20px;display:flex}.learn-heading h2{margin:7px 0;font-size:clamp(1.45rem,2.5vw,2rem)}.learn-subjects{grid-template-columns:repeat(4,minmax(0,1fr));gap:16px;display:grid}.learn-subject{border-top:5px solid var(--subject);background:linear-gradient(155deg,var(--tint),#fffdf9 65%);flex-direction:column;min-width:0;padding:20px;transition:transform .16s,box-shadow .16s;display:flex;position:relative}.learn-subject:hover{transform:translateY(-3px);box-shadow:0 7px 22px #233c2510}.learn-subject__link{color:#263a32;flex:1;text-decoration:none}.learn-subject__link h2,.learn-subject__link h3{margin:12px 0 7px;font-size:1.18rem}.learn-subject__link p{overflow-wrap:anywhere;margin:0 0 18px;font-size:.9rem;line-height:1.45}.learn-subject__icon{background:#fffa;border-radius:14px;place-items:center;width:48px;height:48px;font-size:1.65rem;display:grid}.learn-subject small{color:#52625b;margin:6px 0 10px;font-size:.75rem;line-height:1.4}.learn-subject__reason{color:#53655c;font-size:.73rem;line-height:1.4}.learn-meter{background:#0000000d;border-radius:6px;height:6px;overflow:hidden}.learn-meter span{background:var(--subject);border-radius:6px;height:100%;display:block}.learn-start{color:var(--subject);box-sizing:border-box;justify-content:space-between;min-height:44px;margin-top:15px;padding:10px 0;font-weight:800;text-decoration:none;display:flex}.learn-subject.is-complete{border-top-style:solid}.learn-subject a:focus-visible,.learn-button:focus-visible{outline-offset:5px;border-radius:5px;outline:3px solid #2467c5}.learn-actions{flex-wrap:wrap;align-items:center;gap:12px;display:flex}.learn-actions a{font-size:.86rem}.learn-pill{background:#ffffff9c;border:1px solid #d0ddcf;border-radius:20px;padding:7px 12px;font-size:.83rem;font-weight:700;display:inline-block}.learn-button,.learn-panel button,.learn-activity button{color:#fff;cursor:pointer;background:#176b54;border:1px solid #176b54;border-radius:12px;justify-content:center;align-items:center;gap:8px;min-height:44px;padding:11px 18px;font:700 .95rem inherit;text-decoration:none;display:inline-flex}.learn-button.secondary,.learn-activity button.secondary{color:#176b54;background:#fff}.learn-button:hover,.learn-panel button:hover{filter:brightness(1.08)}.learn-panel{color:#263d32;margin:24px 0;padding:clamp(18px,3vw,30px)}.learn-panel h2{margin:4px 0 12px}.learn-panel p{line-height:1.65}.learn-fine{line-height:1.65;color:#59695f!important;font-size:.8rem!important}.learn-target-note{max-width:850px;margin:18px 4px 25px}.learn-grade{align-items:center;gap:10px;margin-top:18px;font-size:.9rem;display:flex}.learn-grade select,.learn-panel select,.learn-panel input,.learn-panel textarea,.learn-activity textarea{font:inherit;color:#263d32;background:#fff;border:1px solid #a3b4a5;border-radius:9px;max-width:100%;padding:10px}.learn-resume{background:#edf6ff;border-color:#bbd2e5;justify-content:space-between;align-items:center;gap:18px;margin-bottom:24px;padding:20px 26px;display:flex}.learn-resume h2{margin:7px 0 0;font-size:1.25rem}.learn-explore{grid-template-columns:repeat(4,minmax(0,1fr));gap:12px;display:grid}.learn-explore a{color:#315941;border:1px solid #d7e0d4;border-radius:12px;padding:17px;font-weight:700;text-decoration:none}.learn-share__cards{grid-template-columns:repeat(3,minmax(0,1fr));gap:22px;margin:20px 0;display:grid}.learn-share__cards h3{margin:0 0 9px;font-size:1rem}.learn-share__cards p,.learn-share__cards li{font-size:.9rem;line-height:1.65}.learn-share__cards ul{padding-left:18px}.learn-share label{margin:15px 0 8px;font-size:.9rem;font-weight:700;display:block}.learn-share textarea{box-sizing:border-box;resize:vertical;width:100%;margin-bottom:10px;display:block}.home-learning{margin:28px 0 34px}.learn-activity{max-width:850px;margin:24px auto}.learn-activity h1{font-size:clamp(1.65rem,3vw,2.5rem);line-height:1.2}.learn-activity p,.learn-activity li{line-height:1.7}.learn-activity .learn-panel{margin:18px 0}.learn-stepbar{gap:6px;margin:20px 0;display:flex}.learn-stepbar span{background:#dfe8de;border-radius:5px;flex:1;height:5px}.learn-stepbar .done{background:#398461}.learn-example{white-space:pre-wrap;background:#f3f0e5;border-left:4px solid #b08841;border-radius:8px;margin:18px 0;padding:18px}.learn-options{gap:12px;margin:20px 0;display:grid}.learn-options button{color:#233c32;text-align:left;line-height:1.5;font:inherit;background:#fff;border:2px solid #c8d5c9;justify-content:flex-start;min-height:54px}.learn-options button:hover{background:#eff7f0;border-color:#176b54}.learn-options button[aria-pressed=true]{background:#e3f1e7;border-color:#176b54}.learn-feedback{background:#e6f2e9;border:1px solid #b5d0bc;border-radius:12px;margin:18px 0;padding:18px;line-height:1.7}.learn-feedback.retry{background:#fff4de;border-color:#dfc28e}.learn-activity label{margin:16px 0 8px;font-weight:700;display:block}.learn-activity textarea{box-sizing:border-box;width:100%;min-height:180px}.learn-activity button:disabled{opacity:.65;cursor:default}.learn-table-wrap{overflow:auto}.learn-table{border-collapse:collapse;width:100%}.learn-table th,.learn-table td{text-align:left;border-bottom:1px solid #dce4d8;padding:13px 9px;font-size:.86rem}.learn-table th{color:#56665a}.learn-settings-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:16px;display:grid}.learn-setting{border:1px solid #dce4d8;border-radius:12px;padding:16px}.learn-setting label{margin:10px 0;font-size:.85rem;display:block}.learn-setting input{width:68px}.learn-error{color:#9b301a;line-height:1.6}.learn-rubric{gap:14px;display:grid}.learn-rubric label{font-size:.9rem;display:block}.learn-rubric select{width:100%}@media (width<=850px){.learn-subjects{grid-template-columns:repeat(2,minmax(0,1fr))}.learn-hero img{width:90px;height:90px}.learn-explore{grid-template-columns:repeat(2,minmax(0,1fr))}.learn-share__cards{grid-template-columns:1fr;gap:10px}}@media (width<=480px){.learn-subjects{gap:10px}.learn-subject{border-radius:16px;padding:13px}.learn-subject__link h2,.learn-subject__link h3{font-size:1.03rem}.learn-subject__link p{min-height:38px;font-size:.81rem}.learn-subject small{font-size:.68rem}.learn-subject__reason{font-size:.7rem}.learn-hero{gap:5px;padding:20px}.learn-hero img{display:none}.learn-hero h1{font-size:1.9rem}.learn-heading{flex-direction:column;align-items:flex-start;gap:10px}.learn-heading .learn-button{font-size:.85rem}.learn-resume{flex-direction:column;align-items:flex-start;padding:20px}.learn-settings-grid{grid-template-columns:1fr}.learn-activity{margin-top:18px}.learn-activity .learn-panel{padding:17px}.learn-activity h1{font-size:1.8rem}}@media (prefers-reduced-motion:reduce){.learn-subject{transition:none}.learn-subject:hover{transform:none}}@media print{.site-header,.site-tab-nav,.site-footer,.learn-actions,.learn-hero img,.learn-grade,.no-print{display:none!important}.learn-panel,.learn-subject{break-inside:avoid;box-shadow:none;border-color:#ccc}.learn-subjects{grid-template-columns:repeat(4,1fr)}.learn-activity,.family-shell{max-width:none}.learn-table-wrap{overflow:visible}}.learn-subject__icon{color:var(--subject)}.learn-path{margin:0;padding:0;list-style:none}.learn-path>li{border-bottom:1px solid #dce4d8;justify-content:space-between;align-items:center;gap:18px;padding:22px 0;display:flex}.learn-path h3{margin:7px 0}.learn-path h3 a{color:#244d38}.learn-path p{margin:8px 0;font-size:.9rem}.learn-path small{color:#59695f}.learn-path .learn-button{flex-shrink:0}.learn-browse{min-height:30px;color:var(--subject);font-size:.76rem}@media (width<=480px){.learn-path>li{flex-direction:column;align-items:flex-start}.learn-path .learn-button{align-self:flex-end}.learn-panel select{font-size:16px}}.learn-adventures article{background:#f4f8f2;border-radius:18px;gap:24px;margin:18px 0;display:flex;overflow:hidden}.learn-adventures img{object-fit:cover;width:32%;max-width:230px}.learn-adventures article>div{padding:20px 20px 24px 0}.learn-project-path{background:#edf4ee;border-radius:16px;margin:24px 0;padding:20px}.learn-project-path ol{flex-wrap:wrap;gap:10px;padding:0;list-style:none;display:flex}.learn-project-path a{background:#fff;border-radius:10px;padding:8px 12px;display:block}.learn-project-path [aria-current]{outline:2px solid #176b54}.learn-project-sources article{border-left:4px solid #98bba4;margin:20px 0;padding:4px 18px}.learn-mission-frame{background:#eff5f1;border:1px solid #b5cdbd;border-radius:12px;width:100%;height:650px;max-height:80svh;margin-top:16px}.learn-mission-frame:focus{outline:3px solid #176b54}@media (width<=600px){.learn-adventures article{display:block}.learn-adventures img{width:100%;max-width:none;height:150px}.learn-adventures article>div{padding:0 18px 24px}.learn-project-path ol{display:grid}.learn-mission-frame{height:75svh}}.learn-math-model{background:#ecf5ee;border:1px solid #b8d5bf;border-radius:14px;margin:18px 0;padding:18px}.learn-math-model figcaption{color:#3e5d4a;margin-top:12px;font-size:.8rem;line-height:1.5}.learn-math-model svg{width:100%;height:auto;overflow:visible}.learn-counters{flex-wrap:wrap;gap:8px;margin:12px 0;display:flex}.learn-activity .learn-counter{color:#176b54;background:#fff;border:1px solid #94bda1;flex-direction:column;min-width:44px;min-height:54px;padding:5px;font-size:1.5rem;display:flex}.learn-counter small{min-height:12px;font-size:.7rem;line-height:1}.learn-counter-group{border:1px dashed #176b54;border-radius:8px;flex-wrap:wrap;max-width:245px;padding:6px;display:flex}.learn-tenframe{border:2px solid #365a45;grid-template-columns:repeat(5,1fr);max-width:340px;display:grid}.learn-tenframe>span{color:#176b54;border:1px solid #557461;place-items:center;height:42px;font-size:1.6rem;display:grid}.learn-tenframe b{color:#a06012}.learn-fraction-bar{border:2px solid #365a45;min-height:55px;display:flex}.learn-fraction-bar>span{background:#fff;border-right:1px solid #365a45;flex:1}.learn-fraction-bar .shaded{background:#7ab291}.learn-area-grid{border:1px solid #557461;display:grid}.learn-area-grid>span{aspect-ratio:1;background:#bdd9b9;border:1px solid #557461}.learn-activity [data-focus]:focus{outline:none}.learn-activity [data-focus]:focus-visible{outline-offset:4px;outline:2px solid #176b54}.learn-reading-text{letter-spacing:.02em;word-spacing:.09em;max-width:40ch;margin:28px auto;font-size:clamp(1.3rem,4vw,1.8rem);line-height:1.9}.learn-reading-context{background:#f6faf7;border-radius:14px;margin:18px 0;padding:14px 18px}.learn-reading-context p{white-space:pre-wrap;font-size:1.1rem;line-height:1.8}.learn-bundle{border:1px solid #7cae99;border-radius:7px;flex-direction:column;align-items:center;min-width:40px;margin:3px;padding:6px;display:inline-flex}.learn-bundle>span{letter-spacing:2px;overflow-wrap:anywhere;max-width:48px;font-size:12px;line-height:1.5}.learn-static-counter{color:#176b54;padding:2px;font-size:32px}.learn-static-counter.removed,.learn-tenframe s{color:#8d4c45;text-decoration:line-through;text-decoration-thickness:3px}.learn-model-bars>div{align-items:center;gap:12px;margin:12px 0;display:flex}.learn-model-bars strong{flex-shrink:0;width:40px}.learn-model-bars span{flex-wrap:nowrap;gap:2px;min-width:0;display:flex}.learn-model-bars i{background:#287456;border:1px solid #175036;flex-shrink:0;width:clamp(9px,3vw,23px);height:24px;display:inline-block}.learn-reading-text p,.learn-reading-context p{white-space:pre-wrap}.learn-count-set{aspect-ratio:1;width:100%;max-width:280px;margin:12px auto;position:relative}.learn-activity .learn-count-set .learn-counter{justify-content:center;width:44px;min-width:44px;height:50px;min-height:50px;padding:2px;font-size:24px;position:absolute;transform:translate(-50%,-50%)}.learn-count-set .learn-counter small{font-size:12px}.learn-reading-text.is-literature{letter-spacing:0;word-spacing:normal;max-width:52ch;font-size:clamp(1.05rem,4.2vw,1.35rem);line-height:1.8}.learn-evidence-guide{background:#eef7ff;border-radius:14px;margin:16px 0;padding:14px}.learn-evidence-paragraph{border:2px solid #0000;border-radius:12px;margin:12px 0;padding:12px}.learn-evidence-paragraph.selected{background:#f0faf4;border-color:#367657}.learn-evidence-label{flex-wrap:wrap;align-items:center;gap:10px;font-size:1rem;display:flex}.learn-evidence-label button{white-space:normal;min-height:44px}.learn-evidence-label button:focus-visible{outline-offset:3px;outline:3px solid #284e9b}.learn-evidence-paragraph p{margin-bottom:0}.learn-evidence-saved blockquote{overflow-wrap:anywhere;border-left:4px solid #367657;margin:14px 0;padding:8px 16px}.learn-evidence-saved p{white-space:normal}@media print{.learn-evidence-label button{display:none}.learn-evidence-saved{break-inside:auto}}.learn-return .learn-share__cards{margin:14px 0 6px}.learn-return .learn-pill{display:inline-block}.learn-quick{border-top:1px solid #dce4d8;max-width:760px;margin-top:14px;padding-top:18px}.learn-quick h3{margin:8px 0 4px;font-size:1.2rem;line-height:1.4}.learn-quick form label{flex-wrap:wrap;align-items:center;gap:10px;font-weight:700;display:flex}.learn-mixed{background:#fffcf3;border:2px solid #dcc998}.learn-mixed h3{overflow-wrap:anywhere;line-height:1.4}.learn-mixed form label{flex-wrap:wrap;align-items:center;gap:10px;max-width:100%;font-weight:700;display:flex}.learn-mixed input{box-sizing:border-box;min-width:0;max-width:100%}.learn-mixed .learn-example{white-space:pre-wrap;overflow-wrap:anywhere}.learn-mixed button{min-height:44px}.learn-mixed [tabindex="-1"]:focus-visible{outline-offset:4px;outline:2px solid #176b54}#parents-learning{width:100%;min-width:0}#parents-learning .learn-panel .learn-panel{padding:clamp(12px,2vw,24px)}.learn-check-context{overflow-wrap:anywhere;background:#f5faf7;border:1px solid #b7cdc3;border-radius:14px;margin:1rem 0;padding:clamp(10px,2vw,16px)}.learn-check-context h4{margin:0 0 .5rem;font-size:1rem}.learn-check-context p{margin:.5rem 0}.learn-check-context ol{padding-left:1.25rem}.learn-check-context li+li{border-top:1px solid #d1dfd7;margin-top:1rem;padding-top:.6rem}.learn-array-model{min-width:0;margin-inline:0}.learn-array-grid{gap:6px;width:min(100%,240px);margin:16px auto;display:grid}.learn-array-grid span{aspect-ratio:1;color:#34463c;background:#fff;border:2px solid #64766d;border-radius:6px;place-items:center;font-size:1.4rem;display:grid}.learn-array-grid span.counted{color:#104731;background:#cce9d9;border:3px solid #176b54}.learn-array-controls{flex-wrap:wrap;gap:8px;display:flex}.learn-array-controls .learn-btn{white-space:normal;max-width:100%;min-height:44px}.learn-array-controls [aria-pressed=true]{outline-offset:1px;outline:2px solid #176b54}.learn-array-model [data-array-sum]{overflow-wrap:anywhere;min-height:2.5em;font-weight:700}.learn-share-explorer,.learn-share-static,.learn-share-comparison{min-width:0;margin-inline:0}.learn-share-diagram{width:100%;max-width:260px;margin:12px auto;display:block}.learn-share-controls{flex-wrap:wrap;gap:10px;display:flex}.learn-share-controls label{flex:110px;min-width:0}.learn-share-controls select{width:100%;max-width:100%;min-height:44px}.learn-share-controls .learn-btn{white-space:normal;max-width:100%;min-height:44px}.learn-share-comparison>div{grid-template-columns:repeat(2,minmax(0,1fr));gap:12px;display:grid}.learn-share-comparison section{text-align:center;min-width:0}.learn-share-explorer [data-share-status]{min-height:4em}@media (width<=520px){.learn-check-context .learn-share-comparison>div{grid-template-columns:1fr}.learn-check-context .learn-math-model{padding:8px}}.learn-fraction-groups{gap:1rem;width:100%;min-width:0;display:grid}.learn-fraction-groups section{gap:.35rem;min-width:0;display:grid}.learn-fraction-groups .learn-fraction-bar{box-sizing:border-box;width:100%;min-width:0;max-width:24rem;margin:0}.learn-print-model{box-sizing:border-box;background:#f1f8f2;border:1px solid #b8d3c5;border-radius:16px;min-width:0;margin:20px 0;padding:14px}.learn-print-model figcaption{margin-bottom:12px;line-height:1.5}.learn-print-model small{margin-top:12px;line-height:1.5;display:block}.learn-print-page{box-sizing:border-box;direction:ltr;background:#fffdf7;border:2px solid #365b49;border-left-width:6px;border-radius:3px 14px 14px 3px;min-width:0;padding:18px 10px}.learn-print-lines{color:#153c2d;font-family:Arial,sans-serif;font-size:24px}.learn-print-line{font-size:inherit;flex-wrap:nowrap;align-items:baseline;margin:10px 0 22px;line-height:1.8;display:flex}.learn-print-word{white-space:nowrap}.learn-print-word.is-pointed{background:#d5edda;border-radius:3px;outline:2px solid #176b54}.learn-print-space{white-space:pre;min-width:.4em}.learn-print-space.is-marked{background:#f8d77e;border-radius:2px}@media (width<=380px){.learn-print-model{padding:10px}.learn-print-page{padding:14px 6px}}.learn-check-context .learn-print-lines{font-size:18px}.learn-task-prompt{white-space:pre-line}.learn-teaching-next{overflow-wrap:anywhere;min-width:210px;max-width:30rem}.learn-teaching-next p{margin-top:0}.learn-teaching-next details{margin:8px 0}@media print{[data-period-progress]{break-inside:auto}[data-period-progress] .learn-actions{display:flex!important}[data-period-progress] .learn-period-skill{break-inside:avoid}}.learn-period-skills{gap:16px;padding:0;list-style:none;display:grid}.learn-period-skill{overflow-wrap:anywhere;border:1px solid #dce4d8;border-radius:14px;min-width:0;padding:16px}.learn-period-skill h3{margin:0;font-size:1.05rem;line-height:1.4}.learn-period-skill dl{grid-template-columns:repeat(2,minmax(0,1fr));gap:14px;display:grid}.learn-period-skill dt{color:#56665a;font-size:.82rem;font-weight:700}.learn-period-skill dd{margin:5px 0 0;line-height:1.5}.learn-period-skill a{color:#176b54;font-size:.9rem}.learn-period-skill details p{font-size:.9rem}@media (width<=520px){.learn-period-skill dl{grid-template-columns:1fr}}.learn-tile-grid{border:1px solid #557461;gap:0}.learn-tile-grid span{background:#fff;border:1px solid #557461;border-radius:0}.learn-tile-grid span.counted{background:#b7ddc7;border:1px solid #557461}.learn-tens-model{color:#173d32;background:#eef6ef;border:2px solid #9fbdac;border-radius:16px;margin:18px 0;padding:16px}.learn-tens-bundles{grid-template-columns:repeat(3,minmax(0,1fr));gap:12px;max-width:460px;display:grid}.learn-tens-bundle{text-align:center;background:#fff;border:2px solid #27674d;border-radius:8px;min-width:0;padding:10px 6px;position:relative}.learn-tens-ones{grid-template-columns:repeat(5,minmax(0,1fr));gap:3px;margin-bottom:8px;display:grid}.learn-tens-ones i{aspect-ratio:1;background:#327658;border-radius:50%;display:block}.learn-tens-bundle strong{font-size:14px}.learn-tens-bundle.is-removed{background:#eee9e4;border-style:dashed}.learn-tens-bundle.is-removed i{background:#a9a3a0}.learn-tens-cross{color:#81483c;text-shadow:0 1px #fff;place-items:center;font-size:70px;line-height:1;display:grid;position:absolute;inset:0}.learn-tens-model [data-tens-status]{font-size:1.12rem;font-weight:750}.learn-tens-model .learn-actions{flex-wrap:wrap;gap:10px;display:flex}.learn-tens-model button{max-width:100%}@media (width<=380px){.learn-tens-model{padding:10px}.learn-tens-bundles{gap:7px}.learn-tens-bundle{padding:8px 4px}.learn-tens-bundle strong{font-size:13px}}@media print{.learn-tens-model .learn-actions{display:none}.learn-tens-cross{color:#000}.learn-tens-bundle{break-inside:avoid}}.learn-reading-illustration{max-width:800px;margin:20px 0}.learn-reading-illustration img{border-radius:14px;width:100%;height:auto;display:block}.learn-reading-illustration figcaption{color:var(--text-muted,#53626b);margin-top:8px;font-size:14px;line-height:1.5}.learn-shape-cards{grid-template-columns:repeat(auto-fit,minmax(105px,1fr));gap:12px;display:grid}.learn-shape-card{text-align:center;margin:0}.learn-shape-card svg{width:100%;max-width:250px;height:auto;margin:auto;display:block}.learn-shape-card figcaption{margin-top:5px;font-weight:700}.learn-place-groups{margin:16px 0}.learn-place-groups figcaption{margin-bottom:10px;font-weight:700}.learn-place-groups>div{grid-template-columns:repeat(4,minmax(0,1fr));gap:4px;display:grid}.learn-place-groups span{background:#fff;border:1px solid #abcabc;border-radius:8px;flex-direction:column;align-items:center;padding:10px 2px;display:flex}.learn-place-groups small{font-size:12px}.learn-place-groups b{font-size:25px;line-height:1.5}.learn-place-operation{font-size:24px;font-weight:700}.learn-division-groups{grid-template-columns:repeat(auto-fit,minmax(95px,1fr));gap:10px;margin:16px 0;display:grid}.learn-division-box{background:#fff;border:2px solid #5b8a76;border-radius:12px;min-height:62px;padding:8px}.learn-division-box>span{flex-wrap:wrap;gap:6px;margin-top:8px;display:flex}.learn-division-box i{background:#176b54;border-radius:50%;width:12px;height:12px;display:block}.learn-division-relationship{background:#fff;border:1px solid #abcabc;border-radius:12px;padding:12px}.learn-division-relationship p{margin:8px 0}.learn-angle-model svg{width:100%;max-width:340px;height:auto;margin:auto;display:block}.learn-angle-model input[type=range]{accent-color:#176b54;width:100%;min-width:0;margin:18px 0;display:block}.learn-angle-model [data-angle-status]{font-weight:700}.learn-protractor-model svg{width:100%;max-width:600px;height:auto;margin:12px auto;display:block}.learn-worksheet{margin:18px 0}.learn-angle-model input[type=range]{min-height:44px}.learn-protractor-zoom{margin:12px 0}.learn-protractor-zoom summary{cursor:pointer;min-height:44px;padding:10px 0}.learn-protractor-zoom>div{contain:inline-size;overscroll-behavior-x:contain;width:100%;max-width:100%;overflow:auto}.learn-protractor-zoom>div>svg{width:760px;max-width:none;display:block}.learn-angle-addition svg{width:100%;max-width:380px;height:auto;margin:0 auto;display:block}.learn-angle-parts{grid-template-columns:repeat(3,minmax(0,1fr));gap:8px;margin:8px 0;display:grid}.learn-angle-parts>div{text-align:center;background:#fff;border:1px solid #9cafaa;border-radius:8px;padding:8px 4px}.learn-angle-parts dt{font-size:.78rem}.learn-angle-parts dd{margin:4px 0;font-size:1.2rem;font-weight:700}.learn-angle-addition input[type=range]{width:100%;min-height:44px}.learn-shape-compose svg{width:100%;max-width:380px;height:auto;margin:0 auto;display:block}.learn-length-journey svg{width:100%;max-width:100%;height:auto;font-family:inherit;display:block}.learn-length-zoom{contain:inline-size;min-width:0;margin-top:12px}.learn-length-zoom>div{max-width:100%;padding:10px 0;overflow-x:auto}.learn-length-zoom>div svg{width:900px;min-width:900px;max-width:none}.learn-shape-family svg{width:100%;max-width:340px;height:auto;margin-inline:auto;display:block}.learn-family-facts{background:#fffdf4;border-radius:12px;padding:12px;line-height:1.5}.learn-area-fraction svg{width:100%;max-width:330px;height:auto;margin-inline:auto;display:block}.learn-area-fraction select{min-height:44px;margin:8px;padding:6px 12px}.learn-reading-text .learn-hear-word{font:inherit;color:inherit;min-height:0;line-height:inherit;text-align:inherit;cursor:pointer;background:0 0;border:0;border-radius:3px;padding:0;display:inline}.learn-reading-text .learn-hear-word:hover{background:#f8e9ab}.learn-reading-text .learn-hear-word:focus-visible{outline-offset:2px;outline:2px solid #176b54}.learn-math-in-session .site-tab-nav{display:none}.learn-math-in-session .learn-activity{margin-top:10px}.learn-math-in-session .learn-activity .learn-hero{padding:14px 18px}.learn-math-in-session .learn-hero h1{margin:6px 0;font-size:clamp(1.3rem,3vw,1.8rem)}.learn-math-in-session .learn-stepbar{margin:10px 0}.learn-math-in-session .learn-activity>.learn-panel{margin:10px 0;padding:16px}.learn-math-in-session .learn-math-model{margin:10px 0;padding:10px}.learn-math-in-session .learn-options{gap:8px;margin:12px 0}.learn-math-in-session .learn-options button{min-height:46px;padding:10px 14px}.learn-math-in-session .learn-example{margin:10px 0;padding:12px}.learn-reading-text.is-poem>p+p{margin-top:1.2em}.learn-thumbnail{object-fit:cover;aspect-ratio:3/2;background:#f4eddf;border-radius:12px;max-width:100%;display:block}.learn-thumbnail--card{width:100%;height:auto;margin-bottom:12px}.learn-thumbnail--row{float:left;width:120px;height:80px;margin:0 14px 8px 0}.learn-thumbnail--review{float:left;border-radius:8px;width:64px;height:43px;margin:0 10px 4px 0}.learn-thumbnail--featured{float:right;width:200px;height:auto;margin:0 0 12px 18px}.learn-featured:after{content:"";clear:both;display:block}@media (width<=480px){.learn-thumbnail--row{width:80px;height:54px;margin-right:10px}.learn-thumbnail--featured{width:112px}.learn-thumbnail--card{border-radius:9px;margin-bottom:8px}}@media print{.learn-thumbnail{display:none}}.learn-activity select[data-task-support]{width:100%}.learn-then{color:#445a51;text-underline-offset:3px;overflow-wrap:anywhere;margin-top:2px;font-size:.8rem;text-decoration:underline;display:block}.learn-teach-step{overflow-wrap:anywhere;gap:8px}.learn-module-list{gap:14px;margin:0;padding:0;list-style:none;display:grid}.learn-module{background:#fffdf9;border:1px solid #0000001a;border-radius:14px;padding:14px 16px}.learn-module.is-done{background:#f3fbf5;border-color:#2e7d4f55}.learn-module h3{margin:0 0 4px;font-size:1.05rem}.learn-module>p{color:#445a51;margin:0 0 10px;font-size:.9rem;line-height:1.45}.learn-module-steps{gap:6px;margin:0;padding:0;list-style:none;display:grid}.learn-module-step{flex-wrap:wrap;align-items:baseline;gap:6px 10px;min-width:0;font-size:.9rem;line-height:1.4;display:flex}.learn-module-step a{overflow-wrap:anywhere;font-weight:700}.learn-module-step small{color:#5b6b64}.learn-module-step details{flex-basis:100%;font-size:.85rem}.learn-module-step__status{text-transform:uppercase;letter-spacing:.04em;color:#445a51;background:#0000000d;border-radius:999px;flex:none;padding:2px 8px;font-size:.7rem;font-weight:800}.learn-module-step.is-done .learn-module-step__status{color:#fff;background:#2e7d4f}.learn-module-step.is-next .learn-module-step__status{color:#fff;background:#2467c5}.learn-module-step.is-due .learn-module-step__status{color:#fff;background:#b35c00}.sprint__top{justify-content:space-between;font-size:1.1rem;font-weight:700;display:flex}.sprint__bar{background:#e7ece9;border-radius:99px;height:8px;margin:8px 0 16px;overflow:hidden}.sprint__bar span{background:#2f8a62;height:100%;transition:width .25s linear;display:block}.sprint__form{justify-items:center;gap:12px;margin:12px 0;display:grid}.sprint__fact{letter-spacing:.02em;font-size:clamp(2rem,9vw,3.4rem);font-weight:800}.sprint__form input{text-align:center;border:2px solid #9bb5a8;border-radius:12px;width:min(220px,70vw);padding:8px;font-size:2rem}.sprint__pad{grid-template-columns:repeat(3,64px);gap:8px;display:grid}.sprint__pad button{border-radius:12px;min-height:52px;font-size:1.4rem}.sprint__feedback{text-align:center;min-height:1.5em;font-size:1.1rem}.sprint__score b,.sprint__best b{font-size:1.6rem}.fact-map{margin-top:16px}.fact-map__grids{flex-wrap:wrap;gap:16px;display:flex}.fact-map__grid-wrap{max-width:100%;overflow-x:auto}.fact-map__grid{border-collapse:separate;border-spacing:2px;font-size:.78rem}.fact-map__grid th{text-align:center;color:#46554d;padding:2px 4px;font-weight:700}.fact-map__grid td{background:#eef1ef;border:1px solid #d8dfdb;border-radius:5px;width:22px;height:22px}.fact-map__grid.is-compact td{width:16px;height:16px}.fact-map__grid td.is-learning,.fact-map__key.is-learning{background:#ffd98a;border-color:#e3b24b}.fact-map__grid td.is-fluent,.fact-map__key.is-fluent{background:#56b384;border-color:#2f8a62}.fact-map__grid td.is-empty{background:0 0;border-color:#0000}.fact-map__key{vertical-align:middle;background:#eef1ef;border:1px solid #d8dfdb;border-radius:3px;width:12px;height:12px;display:inline-block}.fact-map__caption{color:#46554d;margin:4px 0 0;font-size:.85rem}.fact-map__sr{clip:rect(0 0 0 0);width:1px;height:1px;position:absolute;overflow:hidden}.my-day__fast-math{margin:12px 0 0}.learn-queue{background:#f3faf5;border:1px solid #cfe6d6;border-radius:12px;padding:12px 14px;line-height:1.6}.learn-quick{flex-wrap:wrap;align-items:center;gap:8px;margin:0 0 12px;display:flex}.learn-review-grid{grid-template-columns:minmax(0,1fr) minmax(0,1.2fr);align-items:start;gap:16px;display:grid}.learn-review-answer{background:#fbf8ef;border:1px solid #e6dcc0;border-radius:12px;padding:12px 14px;position:sticky;top:12px}.learn-review-answer h4{text-transform:uppercase;letter-spacing:.04em;color:#6b5a2b;margin:0 0 6px;font-size:.85rem}.learn-review-items{margin:6px 0 0;padding-left:20px}@media (width<=720px){.learn-review-grid{grid-template-columns:1fr}.learn-review-answer{position:static}}.learn-writing-feedback{background:#f7faf6;border:1px solid #c8d5c9;border-radius:12px;margin:14px 0;padding:12px 16px}.learn-writing-checks{margin:8px 0;padding:0;list-style:none}.learn-writing-checks li{padding:6px 0}.learn-writing-checks li.is-ok span{color:#236b47}.learn-writing-checks li.is-try span{color:#9a6a12}.learn-writing-summary{margin:8px 0;font-weight:700}.learn-data-graph{background:#f7faf6;border:1px solid #c8d5c9;border-radius:12px;margin:14px 0;padding:12px 16px}.learn-data-graph h3{margin:0 0 4px}.learn-data-graph label{margin:6px 12px 6px 0;font-weight:600;display:inline-block}.dg-chart{width:100%;max-width:640px;height:auto;margin-top:10px;display:block}.dg-grid{stroke:#dce4d8}.dg-axis{stroke:#56665a;stroke-width:1.5px}.dg-tick{fill:#3c4c42;font-size:13px}.dg-bar{fill:#398461}.dg-line{fill:none;stroke:#176b54;stroke-width:3px}.dg-dot{fill:#176b54}.learn-read-top{cursor:pointer;color:#1f3a2f;background:#fff;border:2px solid #cfe3d6;border-radius:999px;align-items:center;gap:6px;min-height:48px;margin:6px 0 12px;padding:0 18px;font-family:inherit;font-size:1.05rem;font-weight:800;display:inline-flex}.learn-say{cursor:pointer;vertical-align:middle;background:#fff;border:2px solid #dbe8df;border-radius:16px;flex:none;place-items:center;min-width:48px;min-height:48px;font-size:1.3rem;display:inline-grid}.learn-read-top:focus-visible,.learn-say:focus-visible{outline-offset:3px;outline:3px solid #2467c5}.learn-back,.learn-browse,.learn-then,.learn-precheck,.learn-quick,.learn-actions a,.learn-actions button,.learn-panel button.secondary,.learn-module-step a,.learn-modules li a,.learn-featured a,.learn-subject a.learn-start{box-sizing:border-box;align-items:center;min-height:44px;display:inline-flex}.learn-back{padding:4px 0}.today-page main summary{cursor:pointer;align-items:center;min-height:44px;display:flex}.today-page main select,.learn-activity select{min-height:44px}.today-page main h3 a{align-items:center;min-height:44px;display:inline-flex}.is-switching-grade :is([data-diagnostic-offer],.learn-subject,.learn-featured,[data-precheck]){opacity:.45;pointer-events:none;transition:opacity .15s}.learn-grade-loading{color:#276394;margin-left:.6em;font-weight:600}