.erl{--erl-gold:#c7b176;--erl-text:#eee9df;--erl-muted:#b6b4ac;color:var(--erl-text);font:16px/1.6 inherit;max-width:1280px;margin:0 auto;padding:28px 20px 64px;box-sizing:border-box}.erl *{box-sizing:border-box}.erl h2,.erl h3{color:var(--erl-text);text-transform:none;margin:0 0 16px}.erl h2{font-size:clamp(32px,4vw,52px);line-height:1.15}.erl h3{font-size:25px}.erl p{color:var(--erl-muted);margin:0 0 20px}.erl .erl-eyebrow{color:var(--erl-gold);font:600 11px/1.5 sans-serif;letter-spacing:.18em}.erl-intro{max-width:760px;margin-bottom:30px}.erl-toolbar{display:flex;align-items:center;gap:10px;flex-wrap:wrap;margin:18px 0}.erl button,.erl .erl-button,.erl .erl-file{background:#22221e;border:1px solid #615940;border-radius:3px;color:var(--erl-text);padding:10px 14px;font:500 13px/1.4 sans-serif;text-decoration:none;cursor:pointer}.erl button:hover,.erl .erl-button:hover{background:#393528;color:#fff}.erl button:disabled{opacity:.4;cursor:default}.erl button:focus-visible,.erl input:focus-visible,.erl select:focus-visible,.erl summary:focus-visible,.erl a:focus-visible{outline:2px solid var(--erl-gold);outline-offset:3px}.erl #erl-status{font-size:13px;color:var(--erl-gold);flex-basis:100%;min-height:21px}.erl-workspace{display:grid;grid-template-columns:minmax(0,1fr) 330px;gap:26px;align-items:start}.erl-plan,.erl-controls details,.erl-contact,.erl-audio-panel{background:#141512;border:1px solid #38382f;padding:20px;border-radius:4px}.erl-plan-head{display:flex;align-items:center;justify-content:space-between;gap:10px}.erl-plan-head h3{margin:0}.erl-plan-head label{font-size:12px}.erl #erl-svg{width:100%;height:530px;display:block;touch-action:none;margin-top:12px}.erl-svg-label{font-size:.125px;fill:#c5c1b5}.erl-node{cursor:grab}.erl-node:focus circle{stroke:#fff;stroke-width:.04}.erl .erl-hint{font-size:12px;margin:12px 0;color:#aaa99f}.erl-metrics{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:12px;border-top:1px solid #38382f;padding-top:18px}.erl-metrics span{display:block;font-size:11px;color:var(--erl-muted)}.erl-metrics strong{display:block;font-size:20px;color:var(--erl-gold)}.erl .erl-warning{font-size:13px;color:#dec89a;margin-top:14px}.erl-controls details{margin-bottom:12px;padding:16px}.erl summary{cursor:pointer;color:var(--erl-text);font-weight:600;font-size:14px}.erl details[open]>summary{margin-bottom:16px}.erl label{display:block;color:#d1cfc6;font-size:12px}.erl input[type=number],.erl select,.erl textarea{width:100%;min-width:0;color:#eee9df;background:#0d0e0c;border:1px solid #535247;border-radius:3px;padding:9px;font-size:14px;margin:5px 0 8px}.erl input[type=checkbox]{accent-color:#c7b176;width:16px;height:16px;vertical-align:middle}.erl-fields{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:8px 12px}.erl-item{margin-top:18px;border-top:1px solid #38382f;padding-top:14px}.erl-item strong{text-transform:capitalize;font-size:13px}.erl-item button{padding:6px 10px;font-size:12px}.erl-file input{max-width:180px;font-size:11px;margin-left:8px}.erl-results{display:grid;grid-template-columns:1fr 1.3fr;gap:32px;margin:42px 0}.erl-results p{font-size:14px}.erl-table-wrap{max-height:340px;overflow:auto}.erl table{width:100%;border-collapse:collapse;font-size:12px;margin:0}.erl th,.erl td{border:0;border-bottom:1px solid #39392e;padding:10px;text-align:left;white-space:normal}.erl th{position:sticky;top:0;background:#25251f;color:#eee9df}.erl td{color:#c4c2b8}.erl-contact{margin-top:30px}.erl textarea{resize:vertical;font:12px/1.6 monospace}.erl-method{margin-top:24px}.erl-method p{font-size:13px}.erl-audio-panel .erl-fields{grid-template-columns:repeat(3,1fr)}.erl audio{width:100%}.erl audio+*{margin-top:12px}.erl audio{display:none}.erl #erl-audio-status{color:var(--erl-gold);font-size:13px}.erl input[type=range]{width:100%;accent-color:#c7b176}.erl .erl-audio-panel{margin-bottom:24px}.erl .erl-audio-panel p{font-size:13px}.erl .erl-audio-panel label{font-size:13px}
@media(max-width:1023px){.erl-workspace{grid-template-columns:minmax(0,1fr) 285px;gap:16px}.erl-metrics{grid-template-columns:repeat(2,1fr)}.erl #erl-svg{height:450px}.erl-results{grid-template-columns:1fr;gap:26px}}
@media(max-width:767px){.erl{padding:20px 16px 40px}.erl-workspace{grid-template-columns:1fr}.erl-plan{padding:12px}.erl #erl-svg{height:410px}.erl-plan-head{align-items:start}.erl-plan-head h3{font-size:22px}.erl-toolbar{gap:8px}.erl .erl-audio-panel .erl-fields{grid-template-columns:1fr}.erl th,.erl td{padding:8px 5px}.erl-file input{display:block;margin:8px 0 0}.erl-contact{padding:16px}}
.erl-entry{max-width:1160px;margin:48px auto;padding:32px 24px;background:#141512;border:1px solid #38382f;color:#eee9df}.erl-entry h2{color:#eee9df;font-size:32px}.erl-entry p{color:#c5c1b5}.erl-entry a{display:inline-block;padding:12px 18px;border:1px solid #8f805b;color:#eee9df;text-decoration:none}.erl-entry a:hover{background:#393528}.erl [aria-pressed=true]{border-color:#d0bd85;background:#393528}.erl meter{display:block;width:100%;height:10px;margin-top:6px}
/* Room Lab 1.1: scoped progressive interface */
.erl [hidden]{display:none!important}.erl-education .erl-lead{font-size:19px}.erl-room-story{display:block;width:100%;max-height:390px}.erl-story-legend{display:flex;flex-wrap:wrap;justify-content:center;gap:24px;font-size:12px;color:#c7b176;margin-bottom:32px}.erl-principles{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:26px}.erl-principles article{border-top:1px solid #454434;padding-top:18px}.erl-principles article>span{font-size:10px;letter-spacing:.12em;color:#c7b176}.erl-principles h3{font-size:23px;margin:12px 0}.erl-principles p{font-size:14px;margin-top:12px}.erl-principles article:nth-last-child(2){grid-column:span 1}.erl-principles article:last-child{grid-column:span 2}.erl-principles svg{height:105px;width:100%;margin-top:12px}.erl-principles svg text{fill:#d6cab1;font:12px sans-serif}.erl-transition{padding:32px 0;margin:28px 0;border-top:1px solid #454434;border-bottom:1px solid #454434}.erl-steps{display:grid;grid-template-columns:repeat(5,minmax(0,1fr));gap:5px;position:relative}.erl-steps button{padding:14px 8px;text-align:left;min-height:48px}.erl #erl-workbench{scroll-margin-top:100px}.erl-workspace{grid-template-columns:minmax(0,1fr) 340px;gap:22px}.erl-plan{position:sticky;top:95px;padding:20px}.erl #erl-svg{height:365px;margin:0}.erl-controls{min-width:0;background:#141512;padding:20px;border:1px solid #38382f;border-radius:4px}.erl-controls h3{font-size:28px}.erl-controls h4{font:500 13px sans-serif;color:#c7b176;margin:22px 0 12px}.erl-controls p{font-size:13px}.erl-controls section>button:last-child{margin-top:20px}.erl-controls details{padding:12px 0;background:transparent;border:0;border-top:1px solid #454434}.erl-dimension{display:grid;grid-template-columns:125px 1fr;align-items:center;gap:16px}.erl .erl-size{font-size:24px;color:#c7b176;margin:16px 0}.erl-add{display:flex;flex-wrap:wrap;gap:7px}.erl-add button{font-size:11px;padding:9px}.erl #erl-object-list{display:flex;gap:6px;flex-wrap:wrap;margin-top:18px}.erl #erl-object-list button{font-size:10px;padding:7px}.erl-node:focus{outline:none}.erl-node:focus>rect:first-child{stroke:#eee4c7;stroke-width:.04}.erl #erl-graph{width:100%;height:auto;display:block}.erl #erl-graph text{fill:#bcb7a8;font:11px sans-serif}.erl-response{border-top:1px solid #38382f;padding-top:20px;margin-top:20px}.erl-response h3{font-size:24px;margin:0}.erl-response .erl-eyebrow{margin-bottom:5px}.erl-response .erl-hint{margin-bottom:0}.erl-advanced{border-top:1px solid #454434;padding-top:20px;margin-top:28px}.erl-results{margin:18px 0;grid-template-columns:1fr 1fr;gap:24px}.erl #erl-material-details p{font-size:11px;overflow-wrap:anywhere}.erl #erl-material-details a{color:#d1bc85}.erl-metrics strong{font-size:18px}.erl-metrics{gap:10px}.erl #erl-status{flex-basis:auto}.erl .erl-audio-panel{padding:0;border:0;background:transparent}.erl .erl-audio-panel .erl-fields{grid-template-columns:1fr}.erl .erl-tracks{display:grid;gap:8px}.erl .erl-tracks button{text-align:left}.erl .erl-tracks small{display:block;color:#b8b3a4}.erl .erl-compare{display:grid;grid-template-columns:1fr 1fr;gap:6px;margin:16px 0}.erl #erl-audio-file{max-width:100%;font-size:12px}.erl .erl-transport{display:flex;gap:10px;align-items:center;margin:18px 0}.erl #erl-time{font-size:12px;color:#ccc4b0}.erl .erl-contact textarea{font-family:inherit}.erl .erl-warning{margin-bottom:0}.erl .erl-plan-head h3{font-size:21px}.erl button,.erl .erl-button{min-height:40px}
@media(min-width:1500px){.erl #erl-svg{height:420px}}
@media(max-width:1023px){.erl-workspace{grid-template-columns:minmax(0,1fr) 280px;gap:14px}.erl-controls{padding:16px}.erl-plan{top:85px;padding:12px}.erl #erl-svg{height:320px}.erl-dimension{grid-template-columns:110px 1fr}.erl-steps button{font-size:11px}.erl-metrics{grid-template-columns:repeat(2,1fr)}}
@media(max-width:767px){.erl{padding:16px 12px 40px}.erl-principles{grid-template-columns:1fr 1fr;gap:16px}.erl-principles article:last-child{grid-column:span 2}.erl-principles h3{font-size:20px}.erl-principles p{font-size:12px}.erl-steps{grid-template-columns:repeat(3,minmax(0,1fr));gap:5px}.erl-workspace{display:flex;flex-direction:column;gap:14px}.erl-plan{position:static;width:100%;padding:12px}.erl-controls{width:100%;padding:18px}.erl #erl-svg{height:280px}.erl-plan-head{align-items:center}.erl-plan-head h3{font-size:19px}.erl-response{padding-top:12px;margin-top:12px}.erl-response h3{font-size:21px}.erl-metrics{grid-template-columns:repeat(4,minmax(0,1fr));gap:5px;padding-top:12px}.erl-metrics strong{font-size:14px}.erl-metrics span{font-size:9px}.erl #erl-graph{max-height:150px}.erl-results{grid-template-columns:1fr}.erl-story-legend{gap:10px;font-size:10px}.erl-contact{padding:16px}.erl-steps button{min-height:44px}.erl input[type=number],.erl select{font-size:16px}.erl-plan .erl-toolbar{margin:10px 0}.erl #erl-status{font-size:11px}.erl .erl-education h2{font-size:34px}}
@media(max-width:767px){.erl-plan{display:contents}.erl-plan-canvas{width:100%;position:sticky;top:62px;z-index:3;background:#141512;border:1px solid #454434;padding:10px;order:0}.erl-plan-canvas #erl-svg{height:190px}.erl-plan-canvas .erl-hint{display:none}.erl-plan-canvas .erl-toolbar{margin:5px 0}.erl-plan-canvas .erl-plan-head h3{font-size:16px}.erl-plan-canvas .erl-plan-head label{font-size:11px}.erl-plan-canvas button{min-height:32px;padding:5px 10px;font-size:11px}.erl-controls{order:2}.erl #erl-metrics{order:1;width:100%}.erl #erl-warning{order:3}.erl-response{order:4;width:100%;margin-top:0}.erl-steps{position:relative}.erl #erl-graph{max-height:none}.erl-plan-canvas:focus-within{outline:1px solid #756949}}

/* 1.1.2: introductory section only */
.erl .erl-section-scene{margin:28px 0 36px;background:#f6f2e9;border:1px solid #d2c8b7;color:#514b40}.erl .erl-section-scene .erl-room-story{max-height:none;height:auto}.erl .erl-section-scene figcaption{display:flex;justify-content:center;flex-wrap:wrap;gap:12px 28px;padding:0 24px 22px;font:12px/1.6 sans-serif;color:#635a4c}.erl-section-scene figcaption span{display:inline-flex;align-items:center;gap:8px}.erl-section-scene figcaption i{width:24px;border-top:2px solid #8b6d36}.erl-section-scene figcaption .erl-key-reflected{border-top:1px dashed #8d958b}.erl .erl-intro-copy p{max-width:48ch;line-height:1.7}.erl .erl-principles{grid-template-columns:repeat(6,minmax(0,1fr))}.erl .erl-principles>article{grid-column:span 2}.erl .erl-principles>.erl-intro-copy{grid-column:span 3}.erl .erl-principles>article:last-child,.erl .erl-principles>article:nth-last-child(2){grid-column:span 2}@media(max-width:767px){.erl .erl-section-scene{margin:22px -4px 28px}.erl .erl-section-scene figcaption{padding:8px 16px 16px;font-size:11px;gap:8px 18px}.erl .erl-principles{grid-template-columns:1fr 1fr}.erl .erl-principles>.erl-intro-copy{grid-column:1/-1}.erl .erl-intro-copy p{font-size:14px;margin:10px 0}.erl .erl-principles>article,.erl .erl-principles>article:nth-last-child(2){grid-column:span 1}.erl .erl-principles>article:last-child{grid-column:1/-1}.erl .erl-section-scene svg text{font-size:15px}}
.erl .erl-player{padding:10px 14px;background:#1b1d17;border:1px solid #514d3a;border-radius:4px}.erl .erl-player-main{display:flex;align-items:center;gap:12px}.erl .erl-player .erl-transport,.erl .erl-player .erl-compare{margin:0;display:flex;gap:6px;flex:none}.erl .erl-player button{min-height:34px;padding:7px 12px;font-size:12px;white-space:nowrap}.erl .erl-player #erl-time{white-space:nowrap;font:11px sans-serif}.erl .erl-player #erl-audio-status{font:11px/1.4 sans-serif;margin:0;min-width:0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.erl .erl-player-sliders{display:grid;grid-template-columns:minmax(0,1fr) 150px 75px;gap:18px;align-items:center;margin-top:5px}.erl .erl-player-sliders label{font:10px/1.2 sans-serif;margin:0}.erl .erl-player input[type=range]{display:block;height:16px;margin:2px 0 0;padding:0}.erl .erl-player meter{display:block;width:100%;height:12px}.erl .erl-audio-settings .erl-eyebrow:not(:first-child){margin:16px 0 6px}.erl .erl-audio-settings .erl-upload{margin-top:14px}.erl .erl-audio-settings input[type=file]{display:block;margin-top:6px;max-width:100%}
@media(min-width:1024px){
 .erl #erl-workbench{display:grid;grid-template-rows:40px 28px minmax(0,1fr) 98px;gap:8px;height:calc(100dvh - 132px);min-height:400px;scroll-margin-top:84px}
 .erl #erl-workbench>.erl-toolbar{margin:0;gap:10px;align-items:center}
 .erl #erl-workbench>.erl-toolbar button{min-height:26px;padding:3px 10px;font-size:10px}
 .erl #erl-workbench #erl-status{font-size:11px;min-height:0}
 .erl #erl-workbench .erl-steps{gap:6px}
 .erl #erl-workbench .erl-steps button{min-height:0;height:40px;padding:8px 10px;font-size:12px;line-height:1.2}
 .erl #erl-workbench .erl-workspace{min-height:0;grid-template-columns:minmax(0,1fr) 320px;gap:14px;align-items:stretch}
 .erl #erl-workbench .erl-plan{position:relative;top:auto;min-height:0;display:flex;flex-direction:column;padding:12px;overflow:hidden}
 .erl #erl-workbench .erl-plan-canvas{display:flex;flex-direction:column;flex:1;min-height:0}
 .erl #erl-workbench .erl-plan-head h3{font-size:19px;margin:0;line-height:1.2}
 .erl #erl-workbench .erl-plan-canvas .erl-toolbar{margin:6px 0;gap:6px}
 .erl #erl-workbench .erl-plan-canvas button{min-height:28px;padding:4px 10px;font-size:11px}
 .erl #erl-workbench #erl-svg{flex:1;height:0;min-height:110px;margin:0;width:100%}
 .erl #erl-workbench #erl-plan-help{font-size:10px;line-height:1.2;margin:4px 0 8px}
 .erl #erl-workbench .erl-metrics{flex:none;grid-template-columns:repeat(4,minmax(0,1fr));padding-top:6px;gap:8px;order:2}
 .erl #erl-workbench .erl-metrics span{font-size:10px;line-height:1.3}
 .erl #erl-workbench .erl-metrics strong{font-size:16px;line-height:1.4}
 .erl #erl-workbench .erl-warning{font-size:10px;line-height:1.3;margin:4px 0 0;order:3}
 .erl #erl-workbench .erl-response{display:none}
 .erl[data-visual-view=response] #erl-workbench .erl-plan-canvas{flex:none}
 .erl[data-visual-view=response] #erl-workbench #erl-svg,.erl[data-visual-view=response] #erl-workbench #erl-plan-help{display:none}
 .erl[data-visual-view=response] #erl-workbench .erl-response{display:flex;flex-direction:column;flex:1;min-height:0;order:1;border:0;padding:0;margin:0 0 8px}
 .erl[data-visual-view=response] #erl-workbench .erl-response h3{font-size:17px;line-height:1.2;margin:2px 0}
 .erl[data-visual-view=response] #erl-workbench #erl-graph{flex:1;height:0;min-height:100px;max-height:none}
 .erl[data-visual-view=response] #erl-workbench .erl-response .erl-hint{font-size:10px;line-height:1.3;margin:4px 0}
 .erl #erl-workbench .erl-controls{overflow:auto;overscroll-behavior:contain;scrollbar-gutter:stable;min-height:0;padding:14px}
 .erl #erl-workbench .erl-controls h3{font-size:22px;line-height:1.15;margin:8px 0 12px}
 .erl #erl-workbench .erl-controls h4{font-size:12px;margin:14px 0 8px}
 .erl #erl-workbench .erl-controls p{font-size:12px;line-height:1.5;margin:0 0 12px}
 .erl #erl-workbench .erl-controls .erl-eyebrow{font-size:10px;line-height:1.4;margin:0 0 8px}
 .erl #erl-workbench .erl-controls label{font-size:11px;line-height:1.3}
 .erl #erl-workbench .erl-controls input[type=number],.erl #erl-workbench .erl-controls select{height:34px;min-height:0;padding:5px 8px;font-size:13px;margin:4px 0 7px}
 .erl #erl-workbench .erl-controls button{min-height:32px;padding:6px 10px;font-size:11px}
 .erl #erl-workbench .erl-controls .erl-fields{gap:5px 10px}
 .erl #erl-workbench .erl-controls .erl-dimension{grid-template-columns:110px 1fr;gap:10px}
 .erl #erl-workbench .erl-controls #erl-size{font-size:18px}
 .erl #erl-workbench .erl-controls section>button:last-child{margin-top:12px}
 .erl #erl-workbench #erl-audio{min-height:0}
 .erl #erl-workbench .erl-player{height:100%}
}
@media(max-width:1023px){.erl [data-view=response]{display:none}.erl #erl-audio{width:100%;margin-top:14px}.erl .erl-player-main{flex-wrap:wrap;gap:8px}.erl .erl-player #erl-audio-status{flex-basis:100%;white-space:normal}.erl .erl-player-sliders{grid-template-columns:minmax(0,1fr) 100px}.erl .erl-meter-label{display:none}.erl .erl-player .erl-choose-track{margin-left:auto}.erl #erl-workbench .erl-response{scroll-margin-top:330px}}
.erl #erl-workbench{overflow-anchor:none}.erl #erl-workbench .erl-controls{scrollbar-color:#625d4b #141512;scrollbar-width:thin}

.erl #erl-svg .erl-svg-label{font-size:var(--erl-label-size,.125px)}

.erl #erl-workbench button[aria-pressed=true]{color:#eee9df;background:#393528;border-color:#b8a16c}
/* 1.4: use recovered chrome space for the metre-based scene. */
.erl #erl-plan-help{position:absolute!important;width:1px!important;height:1px!important;padding:0!important;margin:-1px!important;overflow:hidden!important;clip-path:inset(50%);white-space:nowrap}
.erl .erl-secondary{display:flex;align-items:center;gap:8px;margin:0 0 10px;flex-wrap:wrap}
.erl #erl-workbench .erl-secondary button{background:transparent;border-color:transparent;padding:3px 0;min-height:28px;font-size:11px;color:#b6b4ac}
.erl #erl-workbench .erl-plan-canvas>.erl-toolbar{display:flex;gap:0;margin:0 0 6px;flex-wrap:nowrap}
.erl #erl-workbench .erl-plan-canvas [data-view]{display:block;min-height:32px;height:32px;padding:5px 11px;border-radius:0;margin:0;font-size:11px}
.erl #erl-workbench .erl-plan-canvas [data-view]+[data-view]{border-left:0}
.erl #erl-workbench .erl-metrics{gap:6px;padding-top:5px}
.erl #erl-workbench .erl-metrics strong{font-size:13px;line-height:1.35}
.erl #erl-workbench .erl-metrics span{font-size:9px;line-height:1.25}
.erl #erl-workbench .erl-warning{font-size:10px;line-height:1.25;margin:4px 0 0}
@media(min-width:1024px){
 .erl #erl-workbench{grid-template-rows:40px minmax(0,1fr) 98px}
 .erl #erl-workbench .erl-plan{padding:20px 12px}
}
@media(max-width:1023px){
 .erl #erl-workbench .erl-workspace{display:flex;flex-direction:column;gap:12px}
 .erl #erl-workbench .erl-plan{position:static;display:flex;flex-direction:column;width:100%;padding:10px}
 .erl #erl-workbench .erl-plan-canvas{position:static;display:flex;flex-direction:column;width:100%;padding:0;border:0}
 .erl #erl-workbench .erl-controls{width:100%}
 .erl #erl-workbench #erl-svg{height:clamp(250px,42svh,370px);margin:0;min-height:0}
 .erl #erl-workbench .erl-response{display:none}
 .erl[data-visual-view=response] #erl-workbench #erl-svg{display:none}
 .erl[data-visual-view=response] #erl-workbench .erl-response{display:flex;flex-direction:column;height:clamp(250px,42svh,370px);border:0;padding:0;margin:0;order:0}
 .erl[data-visual-view=response] #erl-workbench #erl-graph{flex:1;min-height:90px;height:0;max-height:none}
 .erl[data-visual-view=response] #erl-workbench .erl-response h3{font-size:18px}
 .erl[data-visual-view=response] #erl-workbench .erl-response .erl-hint{font-size:9px;line-height:1.3;margin:3px 0}
 .erl #erl-workbench #erl-metrics{grid-template-columns:repeat(2,minmax(0,1fr));order:1}
 .erl #erl-workbench #erl-warning{order:2}
 .erl #erl-workbench .erl-secondary{justify-content:flex-end}
}

/* 1.4.1: view controls belong to settings, leaving the scene uninterrupted. */
.erl #erl-workbench .erl-view-switch{display:flex;gap:0;flex-wrap:nowrap;margin:0 0 12px}
.erl #erl-workbench .erl-view-switch [data-view]{display:block;flex:1;min-height:36px;padding:6px 8px;font-size:11px;border-radius:0;white-space:nowrap}
.erl #erl-workbench .erl-view-switch [data-view]+[data-view]{border-left:0}
.erl #erl-workbench .erl-secondary [data-act=reset]{display:inline-flex;align-items:center;justify-content:center;min-height:38px;padding:8px 16px;background:#c6b277;color:#171812;border:1px solid #d6c58f;border-radius:3px;font-size:12px;font-weight:700;letter-spacing:.02em}
.erl #erl-workbench .erl-secondary [data-act=reset]:hover{background:#ddc994;color:#111}
.erl #erl-workbench .erl-secondary [data-act=reset]:focus-visible{outline:2px solid #f5ebd0;outline-offset:3px}
@media(min-width:1024px){.erl #erl-workbench .erl-plan{padding-top:10px}}
@media(max-width:1023px){.erl #erl-workbench .erl-secondary{justify-content:flex-start}.erl #erl-workbench #erl-svg{height:clamp(288px,calc(42svh + 38px),408px)}}
/* Educational illustration only: no workbench selectors. */
.erl .es-scene{margin:24px 0 14px;background:#161714;border:1px solid #454434;border-radius:5px;overflow:hidden}
.erl .es-scene svg{display:block;width:100%;height:auto;max-height:none}
.erl .es-scene figcaption{padding:10px 18px;font:12px/1.5 sans-serif;color:#b8b4a9}
.erl .es-layers{display:flex;flex-wrap:wrap;gap:8px;margin:12px 0}
.erl .es-layers button{font-size:12px;padding:9px 14px;min-height:40px}
.erl .es-layers button[aria-pressed=true]{background:#c6b277;color:#171812;border-color:#c6b277}
.erl .es-explanation{padding:16px 20px;border-left:2px solid #c6b277;background:#181914;min-height:136px}
.erl .es-explanation h3{font-size:24px;margin:0 0 8px}
.erl .es-explanation p{font-size:15px;line-height:1.65;margin:0;max-width:90ch}
.erl .es-notes{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:28px;margin:32px 0}
.erl .es-notes h3{font-size:25px;line-height:1.25;margin:10px 0}
.erl .es-notes p{font-size:14px;line-height:1.7}
.erl .es-formula{color:#d4c398}
@media(max-width:767px){.erl .es-notes{grid-template-columns:1fr;gap:12px}.erl .es-explanation{min-height:0;padding:14px}.erl .es-explanation h3{font-size:21px}.erl .es-layers{display:grid;grid-template-columns:repeat(2,minmax(0,1fr))}.erl .es-layers button{padding:8px;font-size:11px}.erl .es-scene{margin-left:-6px;margin-right:-6px}.erl .es-scene figcaption{font-size:10px;padding:8px 10px}}
/* Compact, single-frame explanation. Workbench remains unchanged. */
.erl .es-compact{padding:0;margin:0 0 24px}
.erl .es-compact>.erl-eyebrow{margin:0 0 6px;font-size:10px}
.erl .es-compact>h2{font-size:32px;line-height:1.15;margin:0 0 8px}
.erl .es-intro{font-size:14px;line-height:1.45;margin:0 0 16px}
.erl .es-overview{display:grid;grid-template-columns:minmax(0,2.5fr) minmax(270px,1fr);gap:22px;align-items:center}
.erl .es-compact .es-scene{margin:0}
.erl .es-compact .es-scene figcaption{font-size:10px;line-height:1.4;padding:7px 10px}
.erl .es-guide{display:grid;gap:15px}
.erl .es-guide h3{font-size:19px;line-height:1.2;margin:0 0 5px;display:flex;gap:8px;align-items:center}
.erl .es-guide p{font-size:12px;line-height:1.5;margin:0}
.erl .es-guide i{width:20px;border-top:2px solid var(--key);display:inline-block}
.erl .es-legend{display:flex;flex-wrap:wrap;gap:4px 12px;margin-bottom:7px!important}
.erl .es-legend span{display:inline-flex;align-items:center;gap:5px;font-size:10px}
.erl .es-legend span:before{content:'';width:16px;border-top:2px dashed var(--key)}
.erl .es-guide .es-next{color:#c6b277;font-size:11px;padding-top:8px;border-top:1px solid #454434}
@media(max-width:767px){.erl .es-compact>h2{font-size:23px}.erl .es-intro{font-size:12px;margin-bottom:10px}.erl .es-overview{grid-template-columns:1fr;gap:12px}.erl .es-guide{gap:10px}.erl .es-guide h3{font-size:16px;margin-bottom:3px}.erl .es-guide p{font-size:11px;line-height:1.4}.erl .es-compact .es-scene figcaption{font-size:9px;padding:5px 8px}.erl .es-compact{margin-bottom:20px}}
@media(min-width:768px){.erl .es-compact>h2{font-size:26px}.erl .es-compact .es-overview{grid-template-columns:minmax(0,1.8fr) minmax(330px,1fr);gap:18px}.erl .es-compact .es-scene svg{height:clamp(170px,calc(100svh - 455px),290px)}.erl .es-compact .es-guide{gap:9px}.erl .es-compact .es-guide h3{font-size:17px;margin-bottom:3px}.erl .es-compact .es-guide p{font-size:11px;line-height:1.4}.erl .es-compact .es-intro{margin-bottom:10px}.erl .es-compact .es-scene figcaption{font-size:9px}.erl .es-compact .es-guide .es-next{padding-top:5px}}
@media(max-width:767px){.erl .es-compact>.erl-eyebrow{display:none}.erl .es-compact .es-scene svg{height:125px}.erl .es-compact .es-guide{gap:7px}.erl .es-compact .es-intro{margin-bottom:6px}}
/* Large illustration with six practical steps underneath. */
.erl .es-compact .es-overview{display:block}
.erl .es-compact .es-scene{max-width:100%;margin:0 auto 24px}
.erl .es-compact .es-scene svg{height:clamp(340px,calc(200svh - 910px),580px);width:100%}
.erl .es-setup header h3{font-size:26px;line-height:1.25;margin:0 0 8px}
.erl .es-setup header p{font-size:14px;line-height:1.6;margin:0 0 22px;max-width:85ch}
.erl .es-setup ol{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:22px 32px;list-style:none;padding:0;margin:0 0 22px;counter-reset:setup}
.erl .es-setup li{counter-increment:setup;border-top:1px solid #454434;padding-top:12px}
.erl .es-setup li:before{content:'0' counter(setup);font:11px/1.5 sans-serif;letter-spacing:.12em;color:#c6b277}
.erl .es-setup h4{font-family:inherit;font-size:18px;line-height:1.3;margin:7px 0}
.erl .es-setup li p{font-size:13px;line-height:1.65;margin:0}
.erl .es-reference{font-size:10px;line-height:1.5;color:#aaa79e;margin-top:10px}
.erl .es-reference a{color:#c6b277}
@media(max-width:1023px){.erl .es-setup ol{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media(max-width:767px){.erl .es-compact .es-scene svg{height:250px}.erl .es-setup ol{grid-template-columns:1fr;gap:16px}.erl .es-setup header h3{font-size:22px}.erl .es-setup h4{font-size:18px}.erl .es-setup li p{font-size:13px}}
/* User-supplied panoramic crop; preserve all six steps below it. */
.erl .es-compact .es-scene{margin-bottom:18px}
.erl .es-compact .es-scene svg{height:auto;width:100%;aspect-ratio:1672/688;display:block}
.erl .es-setup header p{margin-bottom:16px}
.erl .es-setup ol{gap:16px 28px}
/* First-screen overview: illustration and six concise steps together. */
.erl .es-compact{margin-bottom:20px}
.erl .es-compact>.erl-eyebrow{display:none}
.erl .es-compact>h2{font-size:23px;margin:0 0 4px;line-height:1.2}
.erl .es-compact .es-intro{font-size:12px;margin:0 0 8px;line-height:1.35}
.erl .es-compact .es-scene{margin:0 auto 10px;border:0;background:transparent}
.erl .es-compact .es-scene svg{width:100%;height:clamp(130px,calc(100svh - 525px),350px);aspect-ratio:auto}
.erl .es-compact .es-scene figcaption{font-size:9px;line-height:1.2;padding:3px 0;text-align:center}
.erl .es-setup ol{grid-template-columns:repeat(3,minmax(0,1fr));gap:9px 22px;margin:0;padding:0}
.erl .es-setup li{padding-top:6px}
.erl .es-setup li:before{display:none}
.erl .es-setup h4{font-size:14px;line-height:1.2;margin:0 0 4px;color:#ded3b6}
.erl .es-setup li p{font-size:11px;line-height:1.4;margin:0}
@media(min-width:768px){.erl .es-compact{margin-top:-35px}}
@media(max-width:767px){.erl .es-compact>h2{font-size:19px}.erl .es-compact .es-intro{font-size:11px}.erl .es-compact .es-scene svg{height:130px}.erl .es-setup ol{grid-template-columns:repeat(2,minmax(0,1fr));gap:8px 12px}.erl .es-setup h4{font-size:12px}.erl .es-setup li p{font-size:10px;line-height:1.35}.erl .es-compact{margin-top:-20px}}
.erl .es-compact .es-setup ol{gap:6px 22px}.erl .es-compact .es-setup li p{line-height:1.3}
@media(min-width:768px){.erl .es-compact{margin-top:-45px}}

/* One full introductory screen below the sticky navigation. */
@media(min-width:768px){
 .erl .es-compact{display:flex;flex-direction:column;box-sizing:border-box;height:calc(100dvh - var(--es-header-height,72px));min-height:500px;padding:16px 0 24px;margin:0 0 24px;scroll-margin-top:var(--es-header-height,72px)}
 .erl .es-compact>h2{flex:none;font-size:26px}
 .erl .es-compact .es-intro{flex:none;font-size:13px;margin-bottom:10px}
 .erl .es-compact .es-overview{display:flex;flex-direction:column;flex:1;min-height:0;gap:12px}
 .erl .es-compact .es-scene{display:flex;flex-direction:column;flex:1;min-height:0;width:100%;margin:0}
 .erl .es-compact .es-scene svg{flex:1;min-height:0;height:0;width:100%;aspect-ratio:auto}
 .erl .es-compact .es-scene figcaption{flex:none;font-size:10px;padding:4px 0}
 .erl .es-compact .es-setup{flex:none}
 .erl .es-compact .es-setup ol{gap:12px 26px;margin:0}
 .erl .es-compact .es-setup h4{font-size:15px}
 .erl .es-compact .es-setup li p{font-size:12px;line-height:1.4}
}