:root{--navy:#102a3b;--ink:#163144;--muted:#566a78;--teal:#087a6a;--mint:#5ae0c2;--line:#d9e2e7;--paper:#f2f6f8;--red:#b83d36;--orange:#a46115}*{box-sizing:border-box}body{margin:0;background:var(--paper);color:var(--ink);font:16px/1.5 -apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif}button,input,select,textarea{font:inherit}button,select,input[type=range],summary{cursor:pointer}button{border:1px solid var(--line);border-radius:6px;background:white;color:var(--ink);padding:10px 15px;font-weight:650}button:hover{background:#eaf3f3}button:disabled{opacity:.45;cursor:not-allowed}button:focus-visible,input:focus-visible,select:focus-visible,textarea:focus-visible,summary:focus-visible{outline:3px solid #179a88;outline-offset:3px}h1,h2,h3,p{margin:0}h1{font-size:27px;letter-spacing:-1px;line-height:1.15}h2{font-size:18px;letter-spacing:-.3px}h3{font-size:14px;letter-spacing:1px}input,select,textarea{min-width:0;max-width:100%;border:1px solid #c9d6dd;border-radius:5px;background:white;color:var(--ink);padding:10px}select{width:100%;font-size:14px}textarea{resize:vertical;min-height:82px;width:100%}input[type=checkbox],input[type=radio]{accent-color:var(--teal)}[hidden]{display:none!important}.topbar{background:white;display:flex;align-items:center;justify-content:space-between;padding:22px 3.2%;border-bottom:1px solid var(--line);gap:20px}.brand{display:flex;align-items:center;gap:13px}.brandmark{display:grid;place-items:center;background:var(--navy);color:var(--mint);font-size:44px;width:50px;height:50px;border-radius:8px}.eyebrow{font-size:12px;font-weight:750;letter-spacing:1.8px}.teal{color:var(--teal)}.header-right{display:flex;align-items:center;gap:28px}.grade{font-size:12px;letter-spacing:1.3px;color:var(--muted)}.quiet{font-size:14px;background:transparent}main{max-width:1700px;margin:auto;padding:25px 3.2% 18px}.brief{display:flex;justify-content:space-between;gap:32px;padding:2px 0 22px}.brief p{max-width:650px;font-size:16px;margin-top:8px}.constraints{display:flex;align-items:center;gap:22px;flex-shrink:0}.constraint{border-left:1px solid var(--line);padding-left:20px}.constraint small{display:block;color:var(--muted);font-size:12px;letter-spacing:.7px;text-transform:uppercase}.constraint strong{font-size:20px;letter-spacing:-.5px}.workflow{display:flex;gap:16px;align-items:center;border-top:1px solid var(--line);padding:15px 0;font-size:14px;color:var(--muted)}.workflow span{display:flex;gap:8px;align-items:center}.workflow b{font:12px ui-monospace,monospace;border:1px solid var(--line);border-radius:50%;padding:4px 5px}.workflow .active{color:var(--teal);font-weight:650}.workflow .active b{background:#daeee9;border-color:#b9dcd3}.workflow i{color:#a8bcc6}.modebar{display:flex;align-items:center;gap:18px;margin:0 0 18px;background:#e5eef1;border:1px solid #d5e2e6;padding:12px 16px;border-radius:7px}.modebar label{font-size:12px;font-weight:750;letter-spacing:1px;flex-shrink:0}.modebar select{width:230px;flex-shrink:0}.modebar p{font-size:14px;color:#475d6b}.modebar button{font-size:14px}.studio{display:grid;grid-template-columns:250px minmax(0,1fr) 245px;gap:18px;align-items:start}.panel{background:white;border:1px solid var(--line);border-radius:8px;padding:20px;box-shadow:0 2px 2px #0d273203}.panel-heading{display:flex;align-items:center;justify-content:space-between;gap:8px;margin-bottom:18px}.small-tag{font:11px ui-monospace,SFMono-Regular,monospace;letter-spacing:.6px;color:var(--muted)}fieldset{border:0;padding:0;margin:0;min-width:0}label{display:block;font-size:14px;font-weight:600}fieldset>label:not(:first-of-type),#advancedControl label{margin-top:19px}label output{float:right;color:var(--teal);font:600 14px ui-monospace,monospace}fieldset>select{margin-top:7px}.hint{font-size:14px;color:var(--muted);line-height:1.5;margin-top:7px}.design-panel .hint{font-size:12px}.material-note{font-size:12px;color:var(--teal);background:#edf6f3;border-radius:4px;padding:8px;margin-top:8px}input[type=range]{accent-color:var(--teal);padding:0;margin:13px 0 0;width:100%;height:15px}.range-labels{display:flex;justify-content:space-between;font-size:11px;color:var(--muted);margin-top:4px}.design-foot{margin-top:20px;padding-top:16px;border-top:1px solid var(--line);font-size:12px;color:var(--muted)}.center-column{min-width:0;display:grid;gap:18px}.bridge-panel{background:var(--navy);color:#b8d0de;border-radius:8px;overflow:hidden;border:1px solid #193c52}.canvas-head,.canvas-bottom{padding:17px 20px;display:flex;align-items:center;justify-content:space-between;gap:10px;font:11px ui-monospace,monospace;letter-spacing:.6px}.canvas-head b{font-weight:500;color:var(--mint)}.live-dot{display:inline-block;width:6px;height:6px;background:var(--mint);border-radius:50%;vertical-align:middle;margin-right:5px}#bridge{width:100%;display:block;min-height:260px;background-image:linear-gradient(#ffffff06 1px,transparent 1px),linear-gradient(90deg,#ffffff06 1px,transparent 1px);background-size:24px 24px}.canvas-bottom{font-size:11px;letter-spacing:0;padding-top:8px}.stress-key{display:flex;align-items:center;gap:8px}.stress-key i{width:55px;height:5px;border-radius:4px;background:linear-gradient(90deg,#5ae0c2,#ffcc73,#ff6c64)}.load-strip{display:flex;align-items:center;gap:15px;border-top:1px solid #ffffff1a;padding:14px 20px;font:12px ui-monospace,monospace}.track{height:5px;background:#2a4557;flex:1;border-radius:3px;overflow:hidden}#loadProgress{height:100%;width:0;background:var(--mint)}.load-strip strong{min-width:78px;text-align:right;font-weight:500}.prediction{padding:18px 20px}.step-number{font:12px ui-monospace,monospace;color:var(--teal);margin-right:7px}legend{font-size:14px;margin-bottom:10px}.prediction-options{display:grid;grid-template-columns:repeat(4,1fr);gap:7px}.prediction-options label{position:relative;font-size:12px;font-weight:500}.prediction-options input{position:absolute;opacity:0;width:100%;height:100%;margin:0}.prediction-options span{display:flex;text-align:center;justify-content:center;align-items:center;border:1px solid var(--line);border-radius:5px;padding:10px 6px;min-height:54px}.prediction-options input:checked+span{background:#e3f4ee;border-color:var(--teal);color:#096654;box-shadow:inset 0 0 0 1px var(--teal)}.prediction-options input:focus-visible+span{outline:3px solid var(--teal);outline-offset:2px}.vulnerable{margin-top:16px!important;font-size:12px}.vulnerable span{font-weight:400;color:var(--muted)}#vulnerable{width:100%;font-size:14px;margin-top:6px}.test-row{display:flex;align-items:center;justify-content:space-between;gap:15px;margin-top:18px}.test-row p{font-size:12px;color:var(--muted)}.primary{background:var(--teal);border-color:var(--teal);color:white;font-size:13px;letter-spacing:.2px;padding:13px 20px;flex-shrink:0}.primary:hover{background:#066456}.primary span{margin-right:7px}.dashboard{padding:20px 18px}.metric{padding:15px 0;border-top:1px solid var(--line)}.metric:first-child{padding-top:0;border:0}.metric-label{font-size:12px;color:var(--muted);display:flex;justify-content:space-between}.metric-value{font:500 24px ui-monospace,SFMono-Regular,monospace;letter-spacing:-1px;margin:3px 0 6px}.metric-value small{font-size:13px;letter-spacing:0;color:var(--muted)}.metric-track{height:4px;background:#e8eff1;border-radius:5px;overflow:hidden}.metric-track i{display:block;height:100%;background:var(--teal)}.metric-note{font-size:11px;color:var(--muted);margin-top:6px}.metric.warn .metric-track i{background:var(--orange)}.metric.warn .metric-value{color:var(--orange)}.model-notice{border-top:1px solid var(--line);padding-top:15px;margin-top:5px;font-size:11px;color:var(--muted)}.results,.history,.reflection,.teacher{margin-top:20px}.analysis-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:26px}.analysis-grid h3{font-size:12px;color:var(--teal);margin-bottom:8px}.analysis-grid p{font-size:15px;line-height:1.6}.badge{font-size:12px;font-weight:700;padding:6px 10px;border-radius:4px;background:#e6f3ee;color:var(--teal)}.badge.warn{background:#fff0dd;color:#965100}.scores{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;border-top:1px solid var(--line);margin-top:22px;padding-top:17px}.score label{font-size:13px;font-weight:500;display:flex;justify-content:space-between;margin-bottom:8px}.score .metric-track{height:6px}.score small{font-size:11px;color:var(--muted)}.improvement{color:var(--teal);font-size:14px;margin-top:16px}details summary{font-weight:650;font-size:15px;list-style-position:inside}details summary span{font-weight:400;font-size:12px;color:var(--muted);margin-left:10px}#math{border-top:1px solid var(--line);margin-top:18px;padding-top:15px}#mathContent{padding-top:18px;display:grid;grid-template-columns:1fr 1fr;gap:20px;font-size:14px}#mathContent p{margin-top:8px}.equation{font:13px/1.8 ui-monospace,monospace;background:#f0f5f7;padding:12px;border-radius:4px;overflow-wrap:anywhere}.table-wrap{overflow-x:auto}table{width:100%;border-collapse:collapse;font-size:14px;text-align:left;margin-top:14px}th{font-size:11px;text-transform:uppercase;letter-spacing:.5px;color:var(--muted);background:#f3f7f8;padding:12px}td{padding:13px 12px;border-bottom:1px solid var(--line)}td small{display:block;font-size:11px;color:var(--muted);max-width:250px}td button{font-size:12px;padding:5px 9px}td label{display:inline;font-size:12px;margin-right:8px;white-space:nowrap}.empty{text-align:center;color:var(--muted);padding:30px}#comparison{padding:15px;background:#edf5f3;margin-top:16px;border-radius:5px;font-size:14px}.reflection-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;margin-top:18px}.reflection-grid label{font-size:14px}.reflection-grid textarea{margin-top:8px;font-size:14px}.teacher{background:#f9fbfc}.teacher form{margin-top:20px}.teacher-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;margin:15px 0}.teacher-grid input,.teacher-grid select{width:100%;margin-top:6px}.teacher-grid .wide{grid-column:span 3}.teacher input{font-size:14px}.teacher fieldset{margin-top:22px}.check-row{display:flex;flex-wrap:wrap;gap:18px}.checkbox input,.check-row input{width:16px;height:16px;vertical-align:middle;margin-right:7px}.teacher table input[type=number]{width:120px}.teacher table label{white-space:nowrap}footer{display:flex;justify-content:space-between;gap:20px;padding:22px 2px 3px;font-size:11px;color:var(--muted);letter-spacing:.6px}footer b{margin:0 8px;color:var(--teal)}.event-banner{margin-bottom:18px;padding:16px;background:#fff0d9;border:1px solid #e4bd7e;border-radius:6px;font-size:14px}.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);border:0}@media(min-width:1500px){.studio{grid-template-columns:275px minmax(0,1fr) 265px}#bridge{min-height:340px}.prediction-options label{font-size:14px}}@media(max-width:1150px){.studio{grid-template-columns:230px minmax(0,1fr)}.dashboard{grid-column:1/-1}.dashboard #metrics{display:grid;grid-template-columns:repeat(6,1fr);gap:16px}.metric{border:0;padding:0}.metric-value{font-size:21px}.model-notice{font-size:12px}.model-notice br{display:none}.brief{flex-direction:column;gap:15px}.constraint:first-child{padding-left:0;border:0}.constraints{gap:35px}.grade{display:none}}@media(max-width:760px){main{padding:18px 16px}.topbar{padding:16px}.brandmark{display:none}.eyebrow{font-size:10px}h1{font-size:24px}.topbar .quiet{font-size:12px}.studio{grid-template-columns:1fr}.design-panel fieldset{display:grid;grid-template-columns:1fr 1fr;column-gap:15px}.design-panel fieldset>label,.design-panel fieldset>select,.design-panel fieldset>.hint,.design-panel fieldset>.material-note,.design-panel fieldset>input,.design-panel fieldset>.range-labels,#advancedControl{grid-column:1/-1}.dashboard{grid-row:2}.dashboard #metrics{grid-template-columns:repeat(3,1fr);gap:20px}.center-column{grid-row:3}.workflow{gap:8px;font-size:11px;flex-wrap:wrap}.workflow i{display:none}.modebar{flex-wrap:wrap;gap:10px}.modebar p{width:100%}.modebar select{flex:1;min-width:150px}.constraints{gap:15px;flex-wrap:wrap}.constraint{padding-left:15px}.constraint strong{font-size:18px}.canvas-head{font-size:9px}.canvas-bottom{flex-wrap:wrap}#bridge{min-height:200px}.analysis-grid{grid-template-columns:1fr;gap:20px}.scores{grid-template-columns:1fr 1fr}.reflection-grid,.teacher-grid{grid-template-columns:1fr 1fr}.teacher-grid .wide{grid-column:1/-1}.prediction-options{grid-template-columns:1fr 1fr}#mathContent{grid-template-columns:1fr}.test-row{flex-wrap:wrap}.test-row .primary{flex:1}.reflection-grid label:last-child{grid-column:1/-1}footer{flex-direction:column;gap:8px}.panel-heading{flex-wrap:wrap}}@media(prefers-reduced-motion:reduce){*{scroll-behavior:auto!important}}@media print{.topbar,.brief,.workflow,.modebar,.studio,.teacher,footer,button{display:none!important}body{background:white}.panel{break-inside:avoid;border:0}.reflection-grid{grid-template-columns:1fr 1fr}}
/* Keep the bridge visible before the control panels on narrow screens. */
@media(max-width:760px){.studio{display:flex;flex-direction:column}.center-column{display:contents}.bridge-panel{order:0;width:100%}.design-panel{order:1;width:100%}.dashboard{order:2;width:100%}.prediction{order:3;width:100%}}
.design-panel .panel-heading{flex-wrap:wrap}.prediction-options label{font-size:14px}