.algebra-practice{--alp-ink:#202e48;--alp-accent:#51479d;box-sizing:border-box;width:100%;min-width:0;max-width:1120px;margin:24px auto;color:var(--alp-ink);font:400 1rem/1.7 system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;overflow-wrap:anywhere}
.algebra-practice *,.alp-notebook *,.alp-workbook *{box-sizing:border-box;min-width:0}
.alp-practice-heading{display:grid;grid-template-columns:minmax(0,1fr) auto;align-items:start;gap:22px;padding:26px;border:1px solid #c8c9e0;border-top:5px solid #51479d;border-radius:20px;background:linear-gradient(120deg,#f0effb,#f2f7f8)}
.alp-eyebrow{display:block;color:#4c5475;font-size:.76rem;font-weight:800;letter-spacing:.07em;line-height:1.7}
.algebra-practice h3{color:#202e48;font-size:clamp(1.5rem,2.6vw,2rem);line-height:1.25;margin:9px 0 12px}.alp-practice-heading p{margin:0;max-width:60ch}
.alp-count{display:block;align-self:start;padding:8px 13px;border:1px solid #babfda;border-radius:10px;background:#fff;font-size:1rem;font-weight:750;white-space:nowrap;font-variant-numeric:tabular-nums}
.alp-method{padding:19px 22px;margin:16px 0 25px;border-left:4px solid #527855;background:#f2f6ec;border-radius:0 12px 12px 0}
.alp-group h4{font-size:1.12rem;color:#51479d;margin:20px 0 14px;padding-bottom:8px;border-bottom:2px solid #d6d8e8}
.alp-exercises{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:18px;list-style:none;padding:0;margin:0;align-items:start}
.alp-exercise{padding:22px;min-width:0;border:1px solid #cad0df;border-top:4px solid #9898bc;border-radius:16px;background:#fffefd;box-shadow:0 5px 18px #202e4808}
.alp-exercise-heading{display:flex;align-items:center;gap:12px;margin-bottom:16px;font-size:.75rem;font-weight:800;letter-spacing:.055em;color:#4c5475}
.alp-number{display:grid;place-items:center;flex:0 0 40px;width:40px;height:40px;border-radius:11px;background:#51479d;color:#fff;font-size:1.08rem;letter-spacing:0;font-variant-numeric:tabular-nums}
.alp-passage{padding:15px;border:1px solid #d5d8e7;border-radius:10px;background:#f5f5fb;margin-bottom:18px}.alp-passage p{margin:7px 0 0;font-size:1rem;line-height:1.75}
.alp-prompt{display:block;font-size:1.1rem;font-weight:750;line-height:1.55;margin:19px 0 12px;color:#202e48}
.alp-options{padding-left:25px;margin:0 0 14px;line-height:1.7}.alp-options li{padding:5px 0 5px 5px}.alp-options li::marker{font-weight:750;color:#51479d}
.alp-input-help{font-size:.92rem;color:#505d73;margin:12px 0 8px}
.algebra-practice :is(input,select,textarea),.alp-notebook textarea{display:block;width:100%;max-width:100%;min-width:0;min-height:48px;padding:11px 12px;background:#fff;color:#202e48;border:2px solid #909bb3;border-radius:9px;font:inherit;font-size:1rem;line-height:1.5}
.algebra-practice input{max-width:20rem;font-variant-numeric:tabular-nums}.algebra-practice select{white-space:nowrap;text-overflow:ellipsis}.algebra-practice textarea,.alp-notebook textarea{resize:vertical;min-height:96px}
.algebra-practice :is(input,select,textarea)[aria-invalid="true"]{border-color:#a34230;background:#fff9f5}
.algebra-practice :is(input,select,textarea,button,summary,a):focus-visible,.alp-notebook :is(textarea,summary):focus-visible,.alp-workbook summary:focus-visible{outline:3px solid #51479d;outline-offset:3px}
.alp-hint,.alp-source{margin-top:13px;border-top:1px solid #d9deea}.alp-hint summary,.alp-source summary{cursor:pointer;min-height:44px;padding:11px 4px;font-weight:700;color:#494382}
.alp-hint p,.alp-source p{margin:0 0 12px;padding:12px;border-radius:8px;background:#f0f1fb}.alp-source{font-size:.88rem}.alp-source summary{font-weight:500}.alp-source a{color:#423b87;text-decoration:underline;text-underline-offset:3px}
.alp-feedback{padding:15px;margin:14px 0 0;background:#fff1e9;border-left:4px solid #a34230;border-radius:0 10px 10px 0;font-size:1rem;line-height:1.7}.alp-feedback>span{display:block;margin-top:7px}
.alp-exercise[data-alp-status="correct"]{border-top-color:#367348}.alp-exercise[data-alp-status="correct"] .alp-feedback{background:#edf7ef;border-left-color:#367348}.alp-exercise[data-alp-status="missing"] .alp-feedback{background:#f0f3f8;border-left-color:#66788f}
.alp-pause{display:flex;gap:16px;align-items:start;background:#eff3f6;border:1px solid #ced8df;border-radius:14px;padding:20px;margin:26px 0}.alp-pause>span{font-size:1.8rem;color:#4c5475;line-height:1.2}.alp-pause p{margin:5px 0 0}
.alp-practice-actions{border:1px solid #c3c8df;border-radius:16px;background:#f2f2fb;padding:24px;margin-top:26px}.alp-reflection{margin-bottom:20px}.alp-reflection>summary{cursor:pointer;padding:9px 0;min-height:44px;font-weight:650}.alp-reflection label{display:block;margin:10px 0 20px}.alp-reflection label>span,.alp-notebook label>span{display:block;font-size:.94rem;color:#505d73;margin:6px 0 12px}
.algebra-practice .alp-check{display:inline-block;min-height:48px;max-width:100%;padding:12px 20px;background:#51479d;border:2px solid #403780;border-radius:11px;color:#fff;font:inherit;font-size:1.04rem;font-weight:750;line-height:1.5;white-space:normal;cursor:pointer}.algebra-practice .alp-check:hover:not(:disabled){background:#403780}.algebra-practice :disabled{opacity:.65;cursor:not-allowed}
.alp-status{margin:15px 0 10px;font-weight:700}.alp-small{margin:8px 0 0;font-size:.94rem;color:#505d73}
.alp-visual{margin:18px 0;padding:16px;border:1px solid #cbd6df;border-radius:12px;background-color:#f4f8fb;background-image:linear-gradient(#dce5ed70 1px,transparent 1px),linear-gradient(90deg,#dce5ed70 1px,transparent 1px);background-size:18px 18px;max-width:100%;overflow:hidden;color:#202e48}
.alp-visual figcaption{margin-top:16px;padding-top:12px;border-top:1px solid #cbd6df;font-size:.94rem;line-height:1.65;color:#394e62}.alp-visual-key{margin:0 0 14px;font-size:.88rem;line-height:1.6;color:#44566b}
.alp-machine{display:grid;grid-template-columns:minmax(0,1fr);gap:23px;list-style:none;margin:0 auto;padding:0;max-width:290px}.alp-machine li{position:relative;padding:10px 15px;border:1px solid #b6c6d5;border-radius:10px;background:#fff;text-align:center}.alp-machine li+li:before{content:'↓';position:absolute;top:-25px;left:calc(50% - 10px);width:20px;height:23px;color:#51479d;font-size:19px;font-weight:800;line-height:23px}.alp-machine li>span,.alp-equation div>span{display:block;font-size:.65rem;font-weight:800;letter-spacing:.05em;line-height:1.6;color:#526079}.alp-machine strong{display:block;font-size:1.25rem;line-height:1.5;font-weight:750}.alp-machine .alp-machine-operation{border-left:4px solid #51479d;background:#f1effa}.alp-machine .alp-machine-output{border:2px solid #637b5a;background:#f3f7eb}
.alp-equation{display:grid;grid-template-columns:minmax(0,1fr) 26px minmax(0,1fr);gap:6px;align-items:center}.alp-equation>div{align-self:stretch;display:flex;flex-direction:column;justify-content:center;gap:10px;min-height:110px;padding:12px 8px;border:1px solid #b8c8d5;border-radius:10px;background:#fff;text-align:center}.alp-equation strong{font-size:1.2rem;font-weight:750;line-height:1.5;font-variant-numeric:tabular-nums}.alp-equals{display:block;text-align:center;font-size:1.55rem;font-weight:800;color:#51479d}.alp-operation{margin:14px 0 0;padding:10px 12px;border-left:3px solid #51479d;border-radius:0 8px 8px 0;background:#eeecf9}.alp-operation>span{display:block;color:#565578;font-size:.8rem}.alp-operation>strong{display:block;margin-top:3px;font-size:1.05rem}
.alp-terms{display:flex;flex-wrap:wrap;gap:10px;list-style:none;margin:0;padding:0}.alp-terms li{padding:13px 15px;border:1px solid #aabace;border-bottom:4px solid #697cb2;border-radius:8px;background:#fff;font-size:1.22rem;font-weight:750;line-height:1.4;font-variant-numeric:tabular-nums;white-space:nowrap}
.alp-data-table{width:100%;border-collapse:separate;border-spacing:0;table-layout:fixed;background:#fff;border:1px solid #afbed0;border-radius:8px;overflow:hidden;font-size:.95rem;line-height:1.55;font-variant-numeric:tabular-nums}.alp-data-table th,.alp-data-table td{padding:11px 8px;text-align:center;vertical-align:middle;overflow-wrap:anywhere}.alp-data-table th{color:#fff;background:#514f87;font-size:.86rem;font-weight:650}.alp-data-table td+td,.alp-data-table th+th{border-left:1px solid #cdd6e1}.alp-data-table tr+tr td{border-top:1px solid #cdd6e1}.alp-data-table tbody tr:nth-child(even){background:#eef3f8}
.alp-notebook,.alp-workbook,.alp-legacy,.alp-completion-note{box-sizing:border-box;max-width:1120px;min-width:0;margin:20px auto;color:#202e48;font-size:1rem;line-height:1.7;overflow-wrap:anywhere}.alp-notebook,.alp-workbook{padding:0 22px 18px;border:1px solid #cad0df;border-radius:14px;background:#f8f9fc}.alp-notebook:not([open]),.alp-workbook:not([open]){padding-bottom:0}.alp-notebook>summary,.alp-workbook>summary{cursor:pointer;min-height:48px;padding:17px 0;font-weight:750}.alp-writing-help summary{cursor:pointer;min-height:44px;padding:10px 0}.alp-writing-help ul{padding-left:24px}.alp-notebook label{display:block;margin-top:20px}
.alp-legacy{padding:19px 22px;border:1px solid #dac896;border-left:4px solid #b78932;border-radius:12px;background:#fff9e9}.alp-legacy p{margin:7px 0 0}.alp-completion-note{padding:17px 20px;background:#eff2f8;border-left:3px solid #909bbc;border-radius:0 10px 10px 0}
.alp-sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}
@media(max-width:820px){.alp-exercises{grid-template-columns:minmax(0,1fr)}.alp-practice-heading{grid-template-columns:minmax(0,1fr)}.alp-count{justify-self:start}.alp-exercise{padding:20px}}
@media(max-width:560px){.alp-practice-heading{padding:20px 16px;gap:14px}.alp-exercise{padding:17px 14px}.alp-passage{padding:12px}.alp-method,.alp-practice-actions,.alp-pause{padding:17px 15px}.alp-visual{padding:12px 8px}.alp-notebook,.alp-workbook{padding-left:16px;padding-right:16px}.alp-check{width:100%}.alp-count{white-space:normal}.alp-equation strong{font-size:1.08rem}.alp-data-table th,.alp-data-table td{padding:10px 5px}.alp-terms li{padding:11px 12px}}
[data-motion="reduced"] .algebra-practice *,[data-motion="reduced"] .alp-notebook{animation:none;transition:none;scroll-behavior:auto}
@media(prefers-reduced-motion:reduce){.algebra-practice *,.alp-notebook{animation:none;transition:none;scroll-behavior:auto}}