::highlight(house-saved){background:#ebd39b;color:#13232d}.engine-readable:focus{outline:1px solid #baa580;outline-offset:8px}.selection-hint{display:flex;flex-wrap:wrap;align-items:center;gap:8px 18px;padding:12px 0;margin-bottom:22px;border-bottom:1px solid var(--line);font:12px/1.6 var(--sans);color:var(--muted)}.selection-hint button{font:12px/1.6 var(--sans)}#selection-tools{position:fixed;bottom:24px;left:50%;transform:translateX(-50%);z-index:65;background:var(--ink);color:var(--paper);padding:13px 18px;display:flex;gap:10px;align-items:center;max-width:calc(100vw - 28px);box-shadow:0 6px 30px #0003;border:1px solid #657681;border-radius:4px}#selection-label{max-width:230px;line-height:1.4;font:11px/1.5 var(--sans);margin-right:10px}#selection-tools button{background:#f0ebe0;color:var(--ink);border:0;border-radius:3px;padding:10px 13px;font:13px var(--sans);white-space:nowrap;min-height:42px}#engine-drawer{position:fixed;inset:0 0 0 auto;margin:0;width:480px;max-width:100vw;height:100dvh;max-height:100dvh;border:0;border-left:1px solid var(--line);padding:25px 30px 40px;background:var(--paper);color:var(--ink);box-shadow:-15px 0 70px #0b1b2833;z-index:75;overflow:auto}#engine-drawer[open]{display:block}.engine-top{display:flex;align-items:center;justify-content:space-between;gap:16px;margin-bottom:22px}.engine-top .eyebrow{font-size:9px}.engine-top button{font:13px var(--sans);white-space:nowrap}#engine-drawer h2{font-size:35px;margin-bottom:10px}#engine-drawer h3{font-size:25px;line-height:1.25;margin-top:12px}#engine-quote{border-left:3px solid #a5895d;margin:18px 0 28px;padding:10px 0 10px 18px;max-height:170px;overflow:auto;font-size:18px;line-height:1.5;color:#635748}#engine-stage p{font-size:18px;line-height:1.65}#engine-stage .meta{font:12px/1.6 var(--sans)}.engine-route{display:block;width:100%;text-align:left;padding:15px 18px;margin:10px 0;background:var(--surface);border:1px solid var(--line);color:var(--ink);font-size:17px;line-height:1.4}.engine-route:hover{border-color:#9d8465;background:#e9e3d7}.engine-next{display:flex;gap:12px;flex-wrap:wrap;margin-top:28px}.engine-core{font-size:21px!important}.engine-boundary{background:#efe7d7;padding:20px}.engine-diagram{margin:24px 0;padding:20px;background:#eee8dc}.engine-diagram svg{width:100%;height:auto}.fraction-row{display:grid;height:38px;border:1px solid #172832;gap:2px;margin:12px 0 7px;background:#faf8f3}.fraction-row.fourths{grid-template-columns:repeat(4,1fr)}.fraction-row.eighths{grid-template-columns:repeat(8,1fr)}.fraction-row>span{background:#fffdf8;border-right:1px solid #aaa091}.fraction-row .filled{background:#6d8580}.fraction-row>span:last-child{border-right:0}#engine-answer fieldset{border:0;margin:0 0 20px;padding:0;min-width:0}#engine-answer legend{font-size:23px;line-height:1.4;margin-bottom:20px}#engine-answer label{display:flex;align-items:start;gap:12px;background:var(--surface);padding:14px;margin:10px 0;border:1px solid var(--line);font-size:17px;line-height:1.5;cursor:pointer}#engine-answer input{flex-shrink:0;margin-top:6px}.engine-feedback{padding:17px;background:#f3e7d0;border-left:3px solid #a27a36;margin-top:20px;line-height:1.6}.engine-feedback:empty{display:none}.engine-feedback.correct{background:#e7eee4;border-color:#587058}#engine-after .button{margin-top:20px}#selection-note textarea{margin:12px 0;width:100%}.understanding-note{background:#e8ede5;padding:20px;margin:24px 0}.understanding-note p{font-size:16px!important;margin:10px 0 0}#engine-stage>a.text-button{display:block;margin-top:16px}.understanding-entry{padding:18px;background:#eaece3;margin-bottom:12px}.understanding-entry h3{font-size:22px}.understanding-entry p{font-size:14px;margin:0}.math-object{background:#f1ede4;padding:26px!important}.math-object p{font-size:20px}.math-object h3{margin-top:0}.math-intro{max-width:740px}.math-inline-choices{display:flex;flex-direction:column;gap:10px}.math-inline-choices button{padding:15px;background:#fffdf8;border:1px solid var(--line);text-align:left;color:var(--ink)}.math-feedback{padding:16px;background:#e5e8dc;margin-top:16px;line-height:1.5}.device-controls{display:flex;gap:16px;flex-wrap:wrap}@media(max-width:700px){#selection-tools{bottom:12px;flex-wrap:wrap;padding:12px;gap:8px;width:max-content;justify-content:center}#selection-label{flex-basis:100%;max-width:100%;margin:0;font-size:10px}#selection-tools button{padding:10px;font-size:12px}#engine-drawer{width:100%;padding:20px 24px 35px}#engine-drawer h2{font-size:32px}.engine-top{margin-bottom:18px}#engine-quote{font-size:16px;max-height:100px;margin:15px 0 23px}.engine-core{font-size:20px!important}#engine-answer legend{font-size:22px}.math-object{padding:23px!important}}