.third-grade-section{margin:38px 0;padding:28px;background:#edf5f2;border:2px solid #a7c8bb;border-radius:26px}.third-grade-section h2{font:900 30px var(--font);margin:8px 0 14px;color:#255c50}.third-grade-section p{line-height:1.6;max-width:620px}.third-grade-section .first-grade-card{border-color:#a7c8bb}.array-preview{flex:0 0 145px;padding:18px;background:#edf5f2;border-radius:20px;color:#255c50;text-align:center;font:900 25px var(--font)}.array-preview span{display:block;letter-spacing:8px}.array-preview small{display:block;letter-spacing:0;font-size:16px;margin-top:14px}.third-grade-trail{display:grid;grid-template-columns:repeat(4,44px);justify-content:center;gap:8px;margin:16px 0 20px}.third-grade-trail button{min-height:44px;border:1px solid #90b5a7;border-radius:13px;background:#f1f8f5;color:#255c50;font:800 17px var(--font)}.third-grade-trail button[aria-pressed=true]{background:#326e5b;color:white}.third-grade-story{max-width:590px;font-size:20px;line-height:1.6;margin:18px 0}.third-grade-content .array-equation{font:900 38px var(--font);margin:12px 0;color:#255c50}.array-controls{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px;width:100%;max-width:560px;margin:16px 0}.array-controls section{padding:12px;border:1px solid #abc6ba;background:#fff;border-radius:16px;min-width:0}.array-controls h3{font-size:17px;min-height:42px;margin:0 0 10px}.array-stepper{display:grid;grid-template-columns:56px minmax(24px,1fr) 56px;align-items:center;gap:6px}.array-stepper button{width:100%;padding:0;border:1px solid #9ab8aa;border-radius:12px;background:#f1f8f5;color:#255c50;font:900 25px var(--font)}.array-stepper strong{font:900 26px var(--font)}.array-model{display:grid;gap:6px;align-content:start;min-height:145px;width:100%;max-width:560px;border:2px solid #abc6ba;border-radius:20px;background:white;padding:14px;box-sizing:border-box}.array-row{display:flex;justify-content:center;gap:6px;min-height:28px;padding:3px;border-radius:7px;background:#eff6f2}.array-counter{display:grid;place-items:center;flex:0 1 36px;min-width:0;height:28px;color:#326e5b;font-size:26px;line-height:1}.array-empty{align-self:center;padding:18px;line-height:1.5}.array-empty-row{font-size:14px;color:#49695d}.third-grade-content .array-description{margin:12px 0 4px;font-weight:800}.third-grade-content .array-addition{margin:6px 0 18px;font-weight:800;max-width:560px;overflow-wrap:anywhere}.third-grade-answers{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:14px;max-width:450px;width:100%}.third-grade-answers button{padding:12px 4px;border:2px solid #98b7a9;background:#fff;border-radius:16px;color:#255c50;font:900 28px var(--font)}.third-grade-answers button.correct{background:#dcefdc;border-color:#438647}.third-grade-tools{display:flex;justify-content:center;flex-wrap:wrap;gap:12px;margin:18px 0;width:100%}.third-grade-tools .primary-button{width:auto;min-width:145px}.third-grade-content button:focus-visible,.third-grade-section button:focus-visible{outline:3px solid #396c91;outline-offset:4px}body[data-subject=third-grade] .play-card{background:#eff7f3}#third-grade-title{scroll-margin-top:32px}@media(max-width:650px){.third-grade-section{padding:18px}.third-grade-section h2{font-size:27px}.array-preview{flex-basis:auto;width:150px;align-self:center}.array-controls{grid-template-columns:1fr;max-width:400px}.array-controls h3{min-height:0}.array-stepper{grid-template-columns:56px 56px 56px;justify-content:center}.array-model{padding:8px}.array-row{gap:3px}.array-counter{font-size:22px;flex-basis:28px}.third-grade-answers{gap:10px}}