:root{color-scheme:light;--ink:#132b42;--muted:#506478;--paper:#f3f6f8;--line:#ced9e1;--teal:#086f72;--navy:#102d46;--white:#fff;--gold:#ad6413;--red:#b53c39;--green:#276447}*{box-sizing:border-box}body{margin:0;font:17px/1.6 system-ui,-apple-system,"Segoe UI",sans-serif;background:var(--paper);color:var(--ink)}a{color:var(--teal);text-underline-offset:4px}button,input,select,textarea{font:inherit}button,a.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:46px;padding:10px 20px;border:1px solid var(--teal);border-radius:7px;background:var(--teal);color:white;cursor:pointer;text-decoration:none;font-weight:650;line-height:1.3}button:hover,a.btn:hover{filter:brightness(.94)}button:disabled{opacity:.5;cursor:default}.secondary{background:white!important;color:var(--ink)!important;border-color:var(--line)!important}.subtle{padding:7px 14px;background:transparent;color:var(--teal);border-color:var(--line)}:focus-visible{outline:3px solid #da8b27;outline-offset:4px}input,select,textarea{border:1px solid #94a7b7;background:white;color:var(--ink);border-radius:5px;padding:10px;width:100%}textarea{resize:vertical;min-height:100px}label{display:block;font-size:14px;font-weight:650}h1,h2,h3{line-height:1.15;letter-spacing:-.035em}h1{font-size:clamp(34px,4.5vw,60px);margin:10px 0 23px;max-width:850px}h2{font-size:30px;margin:15px 0}h3{font-size:21px;margin:12px 0}p{margin:12px 0}header{background:white;border-bottom:1px solid var(--line);display:flex;align-items:center;justify-content:space-between;gap:24px;padding:19px max(24px,calc((100vw - 1180px)/2));flex-wrap:wrap}.brand{display:flex;align-items:center;gap:13px;color:var(--navy);font-size:14px;font-weight:800;letter-spacing:.09em;line-height:1.3;text-decoration:none}.brand-sub{display:block;color:var(--teal);font-size:12px;letter-spacing:.23em}.brand-mark{font-size:29px;color:var(--teal)}nav{display:flex;gap:24px;flex-wrap:wrap}nav a{font-size:15px;color:var(--muted);text-decoration:none;padding:6px 0}nav a[aria-current=page]{color:var(--teal);border-bottom:2px solid var(--teal)}main{max-width:1180px;margin:auto;padding:45px 24px 70px;min-height:65vh}footer{border-top:1px solid var(--line);padding:22px max(24px,calc((100vw - 1132px)/2));font-size:12px;color:var(--muted);background:#eaf0f4}.eyebrow{text-transform:uppercase;letter-spacing:.15em;font-size:12px;font-weight:750;color:var(--teal)}.lede{font-size:20px;max-width:760px;color:var(--muted)}.hero{padding:12px 0 34px}.hero-grid{display:grid;grid-template-columns:1.4fr 1fr;gap:40px;align-items:center}.hero-aside{background:var(--navy);color:white;padding:30px;border-radius:12px}.hero-aside p{color:#c6d8e3}.hero-aside .eyebrow{color:#88ddcd}.hero-aside ol{padding-left:24px;margin-bottom:0}.hero-aside li{padding:7px}.actions{display:flex;gap:12px;flex-wrap:wrap;margin:22px 0}.notice{border-left:4px solid var(--teal);padding:10px 18px;background:#e6f1f1;font-size:14px;margin:22px 0}.notice.warn{border-color:var(--gold);background:#fff3df}.muted,.small{color:var(--muted)}.small{font-size:13px}.grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px}.card{padding:25px;background:white;border:1px solid var(--line);border-radius:10px}.card .num{color:var(--teal);font-size:13px;font-weight:750;letter-spacing:.12em}.card p{font-size:15px;color:var(--muted)}.card a{font-size:15px;font-weight:650}.card .actions{margin-bottom:0}.section-head{display:flex;align-items:baseline;justify-content:space-between;gap:20px;margin-top:30px;margin-bottom:16px}.section-head p{font-size:14px}.settings{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:18px;margin:25px 0}.settings label{display:grid;gap:7px}.two-col{display:grid;grid-template-columns:1fr 1fr;gap:26px}.lesson{background:white;padding:28px;border:1px solid var(--line);border-radius:9px;margin:20px 0}.lesson li{margin:8px 0}.lesson details{border-top:1px solid var(--line);padding-top:13px;margin-top:18px}summary{cursor:pointer;font-weight:650}.week{margin:30px 0}.session{display:grid;grid-template-columns:55px 1fr auto;gap:20px;border-top:1px solid var(--line);padding:22px 0;align-items:start}.session>span{font-size:22px;font-weight:700;color:var(--teal)}.session h3{margin:0}.session p{font-size:15px}.check{display:flex;align-items:center;gap:8px;font-weight:500;white-space:nowrap}.check input{width:18px;height:18px}.stat-row{display:flex;gap:35px;flex-wrap:wrap;padding:20px 0}.stat strong{display:block;font-size:30px;line-height:1.2}.stat span{font-size:13px;color:var(--muted)}.test-head{display:flex;align-items:center;justify-content:space-between;gap:16px;border-bottom:1px solid var(--line);padding-bottom:20px;margin-bottom:25px}.timer{font-variant-numeric:tabular-nums;font-size:25px;font-weight:700}.question{max-width:920px;margin:auto}.question h2{font-size:27px;letter-spacing:-.02em;line-height:1.4}.passage{padding:20px 24px;border-left:4px solid var(--teal);background:white;font-size:17px;margin:20px 0}.options{display:grid;gap:12px;margin:25px 0}.option{justify-content:flex-start;text-align:left;background:white;color:var(--ink);border-color:var(--line);padding:16px 20px;font-weight:500;min-height:57px}.option.selected{background:#dbeff0;border-color:var(--teal);box-shadow:inset 3px 0 var(--teal)}.option .letter{font-size:13px;border:1px solid var(--line);border-radius:4px;width:27px;height:27px;display:inline-grid;place-items:center;flex:none}.option.correct{border-color:var(--green);background:#e6f3ea}.option.wrong{border-color:var(--red);background:#fff0ed}.feedback{background:#e6f3ea;border-left:4px solid var(--green);padding:18px 22px}.feedback.wrong{background:#fff0ed;border-color:var(--red)}.diagram{max-width:700px;margin:15px auto}.diagram svg{display:block;max-width:100%;height:auto}.option svg{max-height:120px;max-width:140px}.rotation-options{grid-template-columns:repeat(4,1fr)}.rotation-options .option{flex-direction:column}.review{background:white;padding:20px 24px;margin:15px 0;border:1px solid var(--line);border-radius:8px}.review summary{font-size:16px}.review p{font-size:15px}.tag{font-size:12px;padding:4px 9px;border-radius:4px;background:#e7edf1;color:var(--muted)}.table-wrap{overflow-x:auto}table{border-collapse:collapse;width:100%;font-size:14px}th,td{padding:13px 12px;border-bottom:1px solid var(--line);text-align:left;vertical-align:top}th{background:#e7edf1;color:var(--navy)}.game-wrap{background:var(--navy);border-radius:10px;overflow:hidden;padding:12px;position:relative}.game-wrap canvas{display:block;width:100%;height:auto;aspect-ratio:800/360;background:#0c2438;border-radius:6px}.game-controls{display:flex;align-items:center;gap:12px;flex-wrap:wrap;margin-top:16px}.game-side{display:grid;grid-template-columns:1fr 1fr 1.3fr;gap:15px;margin-top:18px}.instrument{background:white;border:1px solid var(--line);border-radius:8px;padding:17px}.instrument .reading{font-size:35px;font-variant-numeric:tabular-nums;line-height:1.2;margin:8px 0}.instrument button{width:100%;font-size:15px;padding:10px}.instrument h3{font-size:17px;margin:0}.math-options{display:flex;gap:8px}.math-options button{min-width:0;flex:1;padding:10px 5px}.pad{display:flex;gap:6px}.pad button{padding:8px 13px;user-select:none;touch-action:none}.overlay{position:absolute;inset:12px;background:rgba(10,29,45,.93);display:grid;place-content:center;text-align:center;color:white;padding:30px;border-radius:6px}.overlay[hidden]{display:none}.large-digits{font-size:clamp(35px,6vw,70px);letter-spacing:.2em;font-weight:650;text-align:center;margin:40px 0;font-variant-numeric:tabular-nums}.reflection-row{padding:20px 0;border-bottom:1px solid var(--line)}.scale{display:flex;gap:12px;flex-wrap:wrap;margin:12px 0}.scale label{font-weight:400;display:flex;gap:8px;align-items:center;font-size:13px}.scale input{width:18px}.empty{text-align:center;padding:60px 20px;color:var(--muted)}kbd{font:13px ui-monospace,monospace;border:1px solid var(--line);border-bottom-width:2px;border-radius:4px;background:white;padding:2px 6px;color:var(--ink)}.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}.skip-link{position:absolute;left:12px;top:-80px;z-index:10;background:white;padding:12px}.skip-link:focus{top:10px}.source{font-size:12px;color:var(--muted);margin-top:18px}.progress-track{height:5px;background:#dce7ec;margin:15px 0}.progress-track>div{height:100%;background:var(--teal)}.pill-row{display:flex;gap:9px;flex-wrap:wrap;margin:15px 0}.pill-row span{padding:4px 10px;background:#e6eef2;border-radius:4px;font-size:12px}.print-only{display:none}@media(max-width:850px){.hero-grid{grid-template-columns:1fr}.grid{grid-template-columns:repeat(2,1fr)}.settings{grid-template-columns:repeat(2,1fr)}.two-col{grid-template-columns:1fr}.game-side{grid-template-columns:1fr 1fr}.game-side .instrument:last-child{grid-column:1/-1}nav{gap:17px}.hero-aside{max-width:600px}}@media(max-width:560px){main{padding:28px 17px 45px}header{padding:15px 17px}nav{gap:14px}nav a{font-size:13px}.grid{grid-template-columns:1fr}.card,.lesson{padding:20px}.rotation-options{grid-template-columns:repeat(2,1fr)}.session{grid-template-columns:35px 1fr;gap:12px}.session .check{grid-column:2}.test-head{align-items:flex-start}.test-head h2{font-size:21px}.stat-row{gap:24px}.stat strong{font-size:24px}.game-side{grid-template-columns:1fr}.game-side .instrument:last-child{grid-column:auto}.settings{gap:13px}.game-controls{gap:8px}.pad button{padding:9px 13px}.hero-aside{padding:22px}h2{font-size:26px}.table-wrap{font-size:12px}}@media print{header,footer,.actions,.settings,.game-controls,button,.no-print{display:none!important}body{background:white;font-size:11pt}main{padding:0;max-width:none}.card,.lesson,.review{break-inside:avoid;border-color:#aaa}.grid{display:block}.card{margin-bottom:14px}.print-only{display:block}.session{break-inside:avoid}a{color:#132b42}}

/* Keep the complete control task visible without scrolling on a laptop. */
main:focus{outline:none}
body:has(#tracking-canvas)>header,body:has(#tracking-canvas)>footer{display:none}
main:has(#tracking-canvas){padding-top:20px;padding-bottom:20px}
main:has(#tracking-canvas) .test-head{margin-bottom:18px;padding-bottom:12px}
main:has(#tracking-canvas) .test-head h2{margin:8px 0}
.game-layout{display:grid;grid-template-columns:minmax(0,1fr);gap:20px;align-items:start}
.game-field{min-width:0}.game-layout .game-wrap{max-width:800px;margin:auto}
.game-layout .game-side{margin:0;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px}
.game-layout .instrument{padding:13px}.game-layout .instrument p{margin:8px 0 0;font-size:12px}
.game-layout .instrument .reading{font-size:30px;margin:7px 0}
@media(min-width:1000px){.game-layout:has(.game-side){grid-template-columns:minmax(0,1fr) 285px}.game-layout .game-side{grid-template-columns:1fr}.game-layout .game-controls{gap:8px}.game-layout .game-controls .small{width:100%;margin:0}}
@media(max-width:999px){.game-layout .game-side .instrument:last-child{grid-column:auto}}
@media(max-width:560px){main:has(#tracking-canvas){padding-top:10px}.game-layout{gap:14px}.game-layout .game-side{grid-template-columns:1fr 1fr;gap:10px}.game-layout .game-side .instrument:last-child{grid-column:1/-1}.game-layout .instrument{padding:10px}.game-layout .instrument h3{font-size:14px}.game-layout .instrument .reading{font-size:26px}.game-layout .instrument button{font-size:12px;padding:8px 5px}.game-controls button{padding:8px 13px}.game-controls .small{width:100%;font-size:11px}.game-controls{margin-top:10px}.game-wrap{padding:8px}.overlay{inset:8px;padding:10px}.overlay h2{font-size:21px}.overlay p{font-size:12px;margin:4px}.game-layout .instrument p{font-size:11px}.game-layout .game-controls .pad{margin-left:auto}}