.math-app{max-width:860px;margin:auto;padding:24px 28px 30px}.math-label{font-size:14px;font-weight:800;letter-spacing:2px;color:#147356}.math-app section{text-align:center}.math-app h1{font-size:clamp(32px,5vw,46px);letter-spacing:-1px;margin:28px 0 10px}.instructions{font-size:20px;color:#526580;margin:0 0 26px}.number-board{display:grid;grid-template-columns:repeat(5,minmax(0,1fr));gap:12px;background:#fff;padding:24px;border:2px solid #dae5f3;border-radius:28px;box-shadow:0 8px 0 #dce6f5}.number-cell{display:grid;place-items:center;min-height:84px;border-radius:18px;font-size:clamp(36px,6vw,62px);font-weight:800;line-height:1.2;color:#314b81;background:#edf3ff;border:2px solid transparent}.number-cell.missing{font:inherit;font-size:clamp(36px,6vw,62px);font-weight:800;color:#176b53;background:#e7f8ef;border:3px dashed #278267;cursor:pointer}.number-cell.found{color:white;background:#197354;border:3px solid #197354}.feedback{font-size:20px;font-weight:700;min-height:52px;display:flex;align-items:center;justify-content:center;margin:20px 0 14px;color:#526580}.feedback.success{color:#166b4e}.feedback.retry{color:#8b4c05}.number-pad{display:grid;grid-template-columns:repeat(5,minmax(0,1fr));gap:12px;max-width:600px;margin:auto}.number-pad button{font:inherit;font-size:32px;font-weight:800;min-height:68px;border-radius:18px;border:2px solid #bdd5cc;box-shadow:0 4px 0 #c5dbd2;background:#fff;color:#176b53;cursor:pointer}.number-pad button:hover:not(:disabled){background:#e7f8ef}.number-pad button:active:not(:disabled){transform:translateY(3px);box-shadow:none}.number-pad button.tried{border-color:#ae6c24;background:#fff3de;color:#8b4c05}.number-pad button:disabled{cursor:default;opacity:.5}.number-pad button.correct{opacity:1;background:#197354;color:#fff;border-color:#197354}.next-wrap{min-height:82px;margin-top:22px}.next-round{font:inherit;font-size:23px;font-weight:800;padding:16px 48px;min-height:62px;border:0;border-radius:18px;background:#197354;color:#fff;box-shadow:0 4px 0 #105039;cursor:pointer}.next-round span{margin-left:14px}[hidden]{display:none!important}@media(max-width:500px){.math-app{padding:18px 16px}.math-app h1{margin-top:24px}.math-label{letter-spacing:1px}.instructions{font-size:18px}.number-board{padding:14px;gap:8px;border-radius:22px}.number-cell,.number-cell.missing{min-height:64px;font-size:36px;border-radius:12px}.number-pad{gap:10px}.number-pad button{min-height:62px;font-size:28px;border-radius:14px}.feedback{font-size:18px;margin-top:18px}.reader-header{flex-wrap:wrap}.next-wrap{margin-top:18px}}@media(prefers-reduced-motion:reduce){*{scroll-behavior:auto!important}}

.assignment-progress{max-width:600px;margin:0 auto 24px}.assignment-progress p{font-size:16px;font-weight:700;color:#526580;margin:0 0 10px}.assignment-progress progress{display:block;width:100%;height:12px;accent-color:#197354;border:0;border-radius:20px;overflow:hidden;background:#dce6f5}.assignment-progress progress::-webkit-progress-bar{background:#dce6f5;border-radius:20px}.assignment-progress progress::-webkit-progress-value{background:#197354;border-radius:20px}.assignment-progress progress::-moz-progress-bar{background:#197354;border-radius:20px}.completion{background:#fff;border:2px solid #dae5f3;border-radius:28px;padding:32px 20px;box-shadow:0 8px 0 #dce6f5}.completion-star{display:block;font-size:64px;color:#b47706}.completion h2{font-size:clamp(32px,5vw,46px);color:#176b53;margin:8px 0 14px}.completion p{font-size:20px;color:#526580;margin:0 0 28px}.completion .next-round{max-width:100%;padding-inline:24px}.completion-home{display:block;width:fit-content;margin:24px auto 0;padding:12px;font-size:18px;font-weight:700;color:#314b81}button:focus-visible,a:focus-visible{outline:3px solid #427fab;outline-offset:5px}

.sequence-3{grid-template-columns:repeat(3,minmax(0,1fr))}.sequence-4{grid-template-columns:repeat(4,minmax(0,1fr))}.sequence-5{grid-template-columns:repeat(5,minmax(0,1fr))}