*{box-sizing:border-box}body{margin:0;color:#222;font:14px Arial,sans-serif;background:white}button,select{font:inherit;border:1px solid #d1d1cc;background:white;border-radius:5px;padding:10px 13px;cursor:pointer;color:#222}button:hover{background:#f0f0ec}button:disabled{opacity:.4;cursor:default}header{height:78px;border-bottom:1px solid #e5e5df;padding:0 4%;display:flex;align-items:center;justify-content:space-between}.brand{font-size:20px;font-weight:600;color:inherit;text-decoration:none}small{font-size:10px;letter-spacing:1.3px;color:#888}main{padding:30px 4% 15px;max-width:1800px;margin:auto}.intro{display:flex;justify-content:space-between;align-items:center;margin-bottom:28px}h1{font:36px Georgia,serif;margin:10px 0}p{color:#777;line-height:1.6}.toolbar{display:flex;align-items:center;gap:10px;margin-bottom:14px}.dark{background:#242424;color:white}.dark:hover{background:#444}#identity{margin-left:8px;color:#777}#panelToggle{margin-left:auto}.workspace{display:flex;border:1px solid #ddd;border-radius:7px;overflow:hidden}.work{min-width:0;flex:1}.steps{display:flex;justify-content:space-between;border-bottom:1px solid #e5e5e0;padding:18px 20px;color:#aaa;font-size:12px}.steps .done{color:#222}.canvas{height:540px;position:relative;overflow:hidden;touch-action:none}svg{width:100%;height:100%;user-select:none}.zoom{position:absolute;bottom:12px;left:14px;display:flex;gap:4px}.zoom button{padding:7px 10px;font-size:12px}.actions{display:flex;gap:8px;flex-wrap:wrap;padding:18px 20px 0}#status{padding:0 20px;font-size:13px}aside{width:160px;flex-shrink:0;background:#fafaf8dd;border-left:1px solid #ddd;padding:20px 12px;display:flex;flex-direction:column;gap:16px}aside label{font-size:11px;display:flex;gap:6px;align-items:center;line-height:1.4}input[type=checkbox]{accent-color:#333}nav{max-height:220px;overflow-y:auto;display:flex;flex-direction:column;gap:4px}nav button{border:0;background:transparent;padding:7px}nav .current{background:#e8e8e2}.resets{margin-top:auto;border-top:1px solid #ddd;padding-top:14px;display:grid;gap:8px}.resets button{font-size:11px;padding:8px}aside.collapsed{display:none}footer{display:flex;justify-content:space-between;color:#999;font-size:11px;padding-top:18px}foreignObject{overflow:visible}.timepair{display:flex;justify-content:center}.timecell{width:38px;text-align:center;display:inline-flex;flex-direction:column;align-items:center}.timecell input,.term input{width:38px;height:29px;border:1px solid #222;border-radius:0;background:transparent;text-align:center;font-size:14px;color:#222;appearance:textfield}.timecell button,.term button{padding:0;border:0;background:transparent;font-size:11px;height:18px;line-height:18px}.timecell small{font-size:9px;color:#888;letter-spacing:0}.ok{background:#e0e0dd!important}.bad{background:#f7dcd9!important}.event{cursor:grab;touch-action:none}.edge{cursor:pointer}.edge.wrong{animation:flash .3s 2}@keyframes flash{50%{opacity:.1}}#floats{border-top:1px solid #ddd;margin-top:24px;padding:20px}h2{font:24px Georgia,serif}.floatgrid{display:grid;grid-template-columns:1fr 1fr;gap:20px}.floatcard{border:1px solid #ddd;padding:18px;border-radius:5px;min-width:0}.floatcard h3{margin:0 0 14px;font-size:14px}.floatcard select{width:100%;font-size:12px;margin-bottom:25px}.equation{display:flex;gap:7px;align-items:center;font-family:Georgia,serif;flex-wrap:wrap}.term{display:flex;flex-direction:column;align-items:center;position:relative}.term small{position:absolute;top:-17px;white-space:nowrap;font:10px Arial;color:#888}.term input{width:42px}.green{color:#398047}.hint{border:0!important;padding:1px!important;color:#777;font-size:10px!important}.complete{font-size:11px;color:#777;margin-top:10px}#finished{text-align:center;background:#f5f5f1;padding:22px}dialog{border:1px solid #ccc;border-radius:8px;max-width:420px;padding:25px}dialog::backdrop{background:#0005}dialog div{display:flex;justify-content:flex-end;gap:10px}#printSheet{display:none}@media(max-width:700px){header{height:65px}header small{display:none}main{padding:20px 12px}.intro{gap:10px}h1{font-size:28px}.intro p{font-size:12px}.intro>button{font-size:11px}.steps{gap:10px;font-size:10px;padding:14px 10px}.canvas{height:450px}#identity{font-size:11px}aside{width:145px}.floatgrid{grid-template-columns:1fr}footer{gap:15px;line-height:1.5}.actions button{font-size:11px;padding:8px}}@page{size:A4 landscape;margin:10mm}@media print{body>*{display:none!important}#printSheet{display:block!important;color:black}#printSheet header{height:35px;padding:0;border-bottom:1px solid black}#printSheet h1{font-size:22px}#printSheet svg{height:112mm;width:100%}#printSheet .printFloats{display:grid;grid-template-columns:1fr 1fr;gap:30px}#printSheet .printFloats div{height:34mm;border-bottom:1px solid #aaa}#printSheet p{color:black;margin:8px 0}}

/* Give the mathematical workspace the page rather than a narrow content column. */
@media screen{
header{height:60px;padding:0 24px}
main{max-width:none;padding:20px 24px 12px}
.intro{margin-bottom:18px}
h1{font-size:30px;margin:7px 0}
.intro p{margin:6px 0}
.canvas{height:clamp(500px,65vh,1000px)}
aside{width:145px}
}
@media screen and (min-width:1700px){.canvas{height:70vh}}
@media screen and (max-width:700px){
header{padding:0 14px}
main{padding:16px 10px}
h1{font-size:26px}
.canvas{height:clamp(430px,65vh,700px)}
.intro{margin-bottom:16px}
}
.toolbar{flex-wrap:wrap}

[hidden]{display:none!important}.mode-toggle{display:inline-flex;border:1px solid #d1d1cc;border-radius:6px;padding:3px;margin:-2px 0 14px;background:#f7f7f4}.mode-toggle button{border:0;padding:8px 14px;background:transparent}.mode-toggle button.active{background:#242424;color:#fff}.builder-work{min-width:0;flex:1}.builder-grid{display:grid;grid-template-columns:minmax(280px,360px) 1fr;min-height:570px}.precedence-card{border-right:1px solid #ddd;padding:22px;background:#fafaf8}.precedence-card h2{margin:8px 0}.precedence-card p{font-size:12px;margin:0 0 16px}.table-wrap{max-height:330px;overflow:auto;margin-bottom:20px;border:1px solid #ddd;background:#fff}.precedence-card table{width:100%;border-collapse:collapse;font-size:12px}.precedence-card th,.precedence-card td{padding:9px 8px;border-bottom:1px solid #e4e4df;text-align:left}.precedence-card th{position:sticky;top:0;background:#f1f1ed;font-size:10px;letter-spacing:.6px;color:#666}.precedence-card td:first-child{font-weight:700}.precedence-card td:last-child,.precedence-card th:last-child{text-align:center}.activity-palette{display:flex;flex-wrap:wrap;gap:6px;margin-top:9px}.activity-palette button{padding:7px 10px;font-size:12px}.activity-palette button.selected{background:#242424;color:white}.activity-palette button.used{background:#e0e0dd;color:#777}.builder-stage{min-width:0;display:flex;flex-direction:column}.builder-instructions{height:48px;border-bottom:1px solid #e5e5e0;padding:16px 18px;color:#777;font-size:12px}.builder-canvas{height:522px;min-height:420px;position:relative;overflow:hidden;touch-action:none}.builder-canvas svg{width:100%;height:100%}.builder-node{cursor:pointer}.builder-node.selected{stroke:#bb2828;stroke-width:5}.builder-edge{cursor:pointer}.builder-actions{border-top:1px solid #ddd;padding-top:16px}.builder-actions #builderCheck{margin-left:auto}#builderStatus{padding:0 20px 5px}#builderFinished{text-align:center;background:#f5f5f1;padding:22px}.builder-correct{color:#777;text-decoration:line-through}.builder-wrong{color:#bb2828}@media(max-width:900px){.builder-grid{grid-template-columns:1fr}.precedence-card{border-right:0;border-bottom:1px solid #ddd}.builder-canvas{height:450px}.table-wrap{max-height:220px}}@media print{#printSheet table{width:100%;border-collapse:collapse;margin:12px 0 20px}#printSheet th,#printSheet td{border:1px solid #777;padding:7px;text-align:left}#printSheet .builder-answer-space{height:120mm;border:1px solid #aaa}}