/* The workbench shares the evaluator palette while keeping the learning sequence spacious. */
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var(--line-2)}.panel-title{display:flex;justify-content:space-between;align-items:center;gap:16px;margin:8px 0 14px}.panel-title h2{font-size:23px}.compact-label{width:64px;flex-shrink:0}.state-panel form{display:grid;gap:17px;margin-top:23px}label{font-family:var(--font-mono),monospace;letter-spacing:.065em;color:var(--ink-2);font-size:11px}input,select{font-family:inherit!important;font-size:14px!important}summary{cursor:pointer;color:var(--ink-2);font-size:12px}.phase-details{border-top:1px solid var(--line-2);padding-top:14px}.phase-details label{margin-top:16px}.phase-details .help{margin-top:12px}.basis{font-size:12px;color:var(--ink-2);line-height:1.65;margin-top:16px;overflow-wrap:anywhere}.error{color:var(--warn);font-size:13px;margin-top:12px}.chart-panel{min-width:0;padding:25px}.chart-controls{display:flex;gap:20px;align-items:end;margin-top:18px}.chart-controls label{max-width:190px}.chart-controls button{font-size:10px;letter-spacing:.06em}#chart{margin-top:14px;min-height:180px}#chart svg{display:block;width:100%;height:auto;overflow:visible}.chart-grid{stroke:var(--line);stroke-width:1}.chart-rh{stroke:var(--ink-3);stroke-width:1;stroke-dasharray:4 5}.chart-saturation{stroke:var(--ink-2);stroke-width:2}.chart-label{fill:var(--ink-2);font:12px system-ui,sans-serif}.chart-axis{fill:var(--ink);font:13px system-ui,sans-serif}.chart-process{stroke:var(--accent);stroke-width:2.5}.chart-point{stroke:var(--ground);stroke-width:2;fill:var(--accent)}.point-1{fill:var(--summer)}.point-2{fill:var(--ink)}.chart-point-label{fill:var(--ink);font:bold 15px system-ui,sans-serif}.chart-key{font-size:12px;color:var(--ink-2);margin:4px 0 18px}.table-wrap{overflow-x:auto}#state-table{width:100%;border-collapse:collapse;font-size:12px;font-variant-numeric:tabular-nums}#state-table caption{text-align:left;font-size:11px;color:var(--ink-2);margin-bottom:10px}#state-table th,#state-table td{text-align:left;padding:10px 9px;border-bottom:1px solid var(--line);white-space:nowrap}#state-table thead th{color:var(--ink-2);font-weight:400}#state-table small{display:block;color:var(--ink-2);font-size:10px}#extra-properties{margin-top:15px}.lesson-section{padding:52px 0 32px}.section-heading{flex-wrap:wrap}.section-heading>div{flex-wrap:wrap}.lesson-tabs{display:grid;grid-template-columns:repeat(4,1fr);gap:12px}.lesson-tabs button{white-space:normal;min-height:110px;padding:18px;text-align:left;text-transform:none;letter-spacing:normal;border-radius:8px;line-height:1.4}.lesson-tabs button strong{font:600 16px system-ui,sans-serif;display:block;margin:6px 0}.lesson-tabs button span{font:12px system-ui,sans-serif}.lesson-tabs button[aria-pressed=true]{border-color:var(--accent);background:var(--panel-2);color:var(--ink)}.lesson-tabs button .lesson-index{font:11px monospace;color:var(--accent)}.experiment{display:grid;grid-template-columns:1.2fr 1fr;gap:28px;background:var(--panel);border:1px solid var(--line-2);border-radius:10px;padding:28px;margin-top:16px}.experiment h3{font-size:25px;margin:8px 0 20px}fieldset{border:0;padding:0;margin:0}legend{font-size:14px;margin-bottom:16px;max-width:55ch}#prediction-choices{display:grid;gap:10px}#prediction-choices label{display:flex;gap:10px;align-items:center;font:13px system-ui,sans-serif;letter-spacing:0;text-transform:none;cursor:pointer}input[type=radio]{width:16px;min-height:16px;accent-color:var(--accent)}.experiment-control{align-self:center}.process-control{display:flex;gap:15px;align-items:center;margin:16px 0}.process-control output{min-width:70px;font:16px monospace;color:var(--ink)}.experiment-control button{margin-top:20px}#prediction-feedback{font-size:13px;color:var(--ink-2);margin-top:12px}.explanation{grid-column:1/-1;border-top:1px solid var(--line-2);padding-top:22px;max-width:100%;font-size:15px;line-height:1.8}.explanation p+p{margin-top:12px}.explanation .arithmetic{font-family:monospace;font-size:13px;padding:12px 15px;background:var(--ground);border-radius:6px}.examples-section{padding:24px 0 36px;border-top:1px solid var(--line-2);margin-top:10px}.examples-grid{display:grid;grid-template-columns:1fr 1.2fr;gap:40px}.import-options{display:grid;grid-template-columns:1fr 1fr;gap:14px;margin:20px 0 12px}.import-options label:last-child{grid-column:1/-1}input[type=file]{font-size:12px!important;white-space:normal;max-width:100%}#import-status{font-size:13px;color:var(--ink-2);margin-top:12px}.history-controls{display:flex;align-items:center;gap:18px;flex-wrap:wrap;padding-top:20px}.history-controls label{flex:1;min-width:150px}.history-controls p{flex-basis:100%;font-size:13px;color:var(--ink-2)}footer{padding:25px 0 35px;border-top:1px solid var(--line-2);display:flex;gap:35px;justify-content:space-between;font-size:12px;color:var(--ink-2)}footer p{max-width:80ch}footer a{white-space:nowrap}button:focus-visible,a:focus-visible,input:focus-visible,select:focus-visible,summary:focus-visible{outline:2px solid var(--accent);outline-offset:4px}
@media(max-width:1000px){.workbench-grid{grid-template-columns:260px minmax(0,1fr)}.state-panel,.chart-panel{padding:20px}.chart-panel .badge{display:none}.lesson-tabs{grid-template-columns:repeat(2,1fr)}}
@media(max-width:720px){main{padding:0 16px}.topbar{padding:18px 16px}.topbar .product{font-size:12px}.topbar .logo{height:18px}.header-actions{gap:12px}.lab-intro{padding:36px 0 30px}.intro-aside{display:none}.workbench-grid{grid-template-columns:1fr}.state-panel{border-right:0;border-bottom:1px solid var(--line-2)}.state-panel form{grid-template-columns:1fr 1fr;gap:18px}.phase-details{grid-column:1/-1}.chart-panel{padding:18px 12px}.chart-controls{gap:10px}.chart-controls label{max-width:150px}.chart-controls button{white-space:normal}.chart-panel h2{font-size:21px}.experiment{grid-template-columns:1fr;padding:22px}.lesson-section{padding-top:36px}.examples-grid{grid-template-columns:1fr;gap:30px}.lesson-tabs{gap:8px}.lesson-tabs button{padding:12px}.lesson-tabs button strong{font-size:14px}.section-heading{gap:12px}footer{flex-direction:column;gap:15px}.table-wrap{max-width:100%}.history-controls button{font-size:10px}.history-controls label{order:3;flex-basis:100%}}