:root{font-family:Candara,'Segoe UI',sans-serif;color:#243b36;background:#edf1ed;font-size:14px;--ink:#243b36;--muted:#576961;--line:#cdd5ce;--panel:#f5f7f3;--accent:#365c4d;--gold:#a08043}*{box-sizing:border-box}body{margin:0}button,input,select{font:inherit}button,select{color:inherit}button{cursor:pointer;border:1px solid #bdc8be;background:transparent;border-radius:5px;padding:8px 12px;transition:background .15s}button:hover{background:#e0e8de}button:disabled{opacity:.45;cursor:default}button.primary,.play{background:var(--accent);color:#fff;border-color:var(--accent)}button.primary:hover,.play:hover{background:#274d3e}.quiet{border-color:transparent}.text-button{padding:0;border:0;border-radius:0;text-align:left;text-decoration:underline;text-underline-offset:3px;font-size:12px}.small{font-size:12px;color:var(--muted)}button:focus-visible,input:focus-visible,select:focus-visible,[tabindex]:focus-visible,a:focus-visible{outline:3px solid #93732b;outline-offset:3px}input[type=checkbox]{accent-color:var(--accent);width:15px;height:15px;vertical-align:middle;margin:0 6px 0 0}input[type=range]{accent-color:var(--accent)}.sr-only{position:absolute;width:1px;height:1px;overflow:hidden;clip-path:inset(50%)}[hidden]{display:none!important}.skip{position:fixed;top:-80px;left:20px;background:white;padding:15px;z-index:10}.skip:focus{top:8px}.masthead{min-height:88px;display:flex;align-items:center;justify-content:space-between;padding:16px 28px;gap:25px;background:var(--panel);border-bottom:1px solid var(--line)}.brand{display:flex;align-items:center;gap:13px;min-width:295px}.brand svg{width:37px;fill:none;stroke:var(--accent);stroke-width:1.2}.brand strong{font-size:19px;font-weight:600;display:block}.brand span{display:block;font-size:12px;color:var(--muted);margin-top:4px}nav{display:flex;background:#e3e9e2;padding:4px;border-radius:7px;gap:3px}nav button{border:0;min-width:100px;font-size:14px}nav button[aria-pressed=true]{background:var(--panel);box-shadow:0 1px 5px #233b3619}nav button[aria-pressed=true]::before{content:'●';font-size:8px;margin-right:8px;color:var(--accent)}.header-actions{display:flex;align-items:center;gap:14px}.header-actions>span{font-size:11px;color:var(--muted)}main{display:grid;grid-template-columns:219px minmax(400px,1fr) 292px;grid-template-rows:minmax(600px,calc(100vh - 225px)) auto;max-width:1920px;margin:auto}.manifest{background:var(--panel);border-right:1px solid var(--line);overflow:auto;padding:23px 19px 16px}.calibre h1{font:34px/1.02 Georgia,serif;font-weight:normal;margin:12px 0}.calibre p{font-size:12px;color:var(--muted);margin:8px 0 16px}.spec-line{display:flex;gap:12px;font-size:11px;border-top:1px solid var(--line);padding-top:12px}.list-heading{display:flex;align-items:center;justify-content:space-between;margin:25px 0 10px}.list-heading h2,.list-heading h3{font-size:13px;margin:0;font-weight:600}.list-heading span{font-size:11px;color:var(--muted)}#part-tree details{margin:0 0 5px}summary{font-size:12px;color:var(--muted);padding:8px 0;cursor:pointer}.part-row{width:100%;display:flex;align-items:center;text-align:left;gap:7px;padding:7px 8px;border:0;border-radius:3px;font-size:12px;margin:1px 0}.part-row .part-symbol{width:15px;color:#806532;font-size:13px}.part-row .part-state{margin-left:auto;font-size:10px}.part-row[aria-pressed=true]{background:#dde7dc;box-shadow:inset 2px 0 var(--accent)}.part-row.in-tray .part-state{color:#685b28}.manifest-foot{display:flex;gap:10px;border-top:1px solid var(--line);margin-top:22px;padding-top:14px;font-size:11px;line-height:1.5;color:var(--muted)}.manifest-foot p{margin:0}.jewel-mark{color:#8a4159;font-size:19px}.work-area{position:relative;display:flex;flex-direction:column;background:#dce2de;min-width:0}.view-toolbar{display:flex;justify-content:space-between;align-items:center;padding:15px 17px;gap:9px;z-index:1}.view-toolbar button{font-size:11px;padding:7px 9px;background:#eef2ece6}.view-buttons{display:flex;gap:4px;flex-wrap:wrap}#stage{flex:1;position:relative;min-height:335px;overflow:hidden;outline-offset:-4px}canvas{display:block;width:100%;height:100%;touch-action:none}#loading{position:absolute;top:45%;left:0;width:100%;text-align:center;z-index:2}.stage-label{position:absolute;left:20px;top:2px;display:flex;align-items:center;gap:7px;font-size:11px;pointer-events:none}.round-dot{height:6px;width:6px;border-radius:50%;background:#395b49}.tray-label{position:absolute;right:26px;top:38px;font-size:12px;pointer-events:none}.tray-label span{display:block;font-size:10px;color:var(--muted);margin-top:5px}.camera-help{position:absolute;bottom:7px;left:20px;font-size:10px;color:#455d52;pointer-events:none}.camera-help span{margin:0 6px}#part-tag{position:absolute;background:#f5f7f3f0;border:1px solid #b5c2b6;padding:6px 10px;border-radius:4px;font-size:11px;pointer-events:none;max-width:160px}#dial-inset{position:absolute;bottom:22px;right:18px;width:104px;pointer-events:none;text-align:center}#dial-inset svg{width:100%;filter:drop-shadow(0 2px 5px #20372d20)}#dial-inset span{font-size:9px;color:#3f574b}.dial-face{fill:#f1f3e9;stroke:#a5b09f;stroke-width:2}.seconds-face{fill:none;stroke:#b4bfaf;stroke-width:.7}#dial-inset text{text-anchor:middle;font:8px Candara,sans-serif;fill:#526556}#dial-ticks line{stroke:#637560;stroke-width:1}#hour-hand{stroke:#243b36;stroke-width:3;stroke-linecap:round}#minute-hand{stroke:#243b36;stroke-width:1.7;stroke-linecap:round}#second-hand{stroke:#8b4e37;stroke-width:1}.view-options{display:flex;align-items:center;gap:17px;padding:13px 20px;background:#d4ddd4;border-top:1px solid #c0cec1;font-size:11px;flex-wrap:wrap}.view-options label{display:flex;align-items:center;white-space:nowrap}.explode-label{margin-left:auto;gap:8px}.explode-label input{width:90px;max-width:100%}.explode-label output{font-size:10px;min-width:27px}#power-path{padding:9px 17px;background:#e3e9df;display:flex;align-items:center;gap:4px;flex-wrap:wrap}#power-path button{font-size:10px;padding:4px 5px;border:0}#power-path button.cut{border-bottom:2px dashed #945738}#power-path span{font-size:10px}.transport{display:flex;align-items:center;justify-content:space-between;padding:17px 19px 8px;gap:15px;background:#edf1e9}.timing{display:flex;gap:7px;align-items:center;flex-wrap:wrap}.timing button{font-size:11px;padding:9px 11px}.timing select{font-size:11px;border:0;background:transparent;max-width:148px;padding:6px 0}.reserve{width:190px;min-width:140px}.reserve>div:first-child{display:flex;justify-content:space-between;font-size:10px;gap:10px}.reserve strong{font-weight:600;white-space:nowrap}.reserve meter{display:block;height:8px;width:100%;margin:4px 0}meter::-webkit-meter-bar{background:#c8d4c2;border:0}meter::-webkit-meter-optimum-value{background:#486a50}.wind-buttons{display:flex;gap:7px;justify-content:flex-end}.wind-buttons button{font-size:10px;padding:4px 7px}.time-note{font-size:10px;display:flex;justify-content:space-between;padding:7px 20px 12px;color:var(--muted);background:#edf1e9;gap:15px}.inspector{padding:22px 22px 14px;background:var(--panel);border-left:1px solid var(--line);overflow:auto}.inspector-top{display:flex;justify-content:space-between;align-items:center}.location{font-size:10px;border:1px solid var(--line);padding:4px 8px;border-radius:15px}.part-sketch{height:85px;display:flex;align-items:center;justify-content:center;margin:5px 0 12px}.part-sketch svg{height:76px;width:110px}.inspector h2{font:25px/1.1 Georgia,serif;font-weight:normal;margin:10px 0 14px}.inspector p{font-size:12px;line-height:1.6;color:#455d50;margin:10px 0 16px}dl{display:grid;grid-template-columns:1fr 1fr;font-size:11px;border-top:1px solid var(--line);padding-top:11px;gap:8px;margin:15px 0}dt{color:var(--muted)}dd{text-align:right;margin:0}#relationships{font-size:11px;color:#526557;margin:12px 0;line-height:1.6}#relationships button{font-size:11px;padding:2px 4px;border:0;text-decoration:underline;text-underline-offset:2px}.wide{width:100%;font-size:12px;margin:5px 0}#dependency-note{font-size:11px;margin:5px 0}#mode-content{border-top:1px solid var(--line);margin-top:21px;padding-top:5px}#mode-content h3{font-size:13px;margin:12px 0 7px}#mode-content label{font-size:11px;display:block;margin:10px 0 5px}#mode-content select{width:100%;padding:8px 4px;font-size:11px;border:1px solid var(--line);border-radius:4px;background:transparent}#mode-content button{font-size:11px;margin:6px 4px 0 0}.case-buttons{display:flex;gap:3px}.case-buttons button{flex:1}.case-buttons button[aria-pressed=true]{background:#dde7dc;border-color:#4b7158}.simulation-label{display:inline-block;font-size:10px;background:#e7eadc;padding:4px 6px;border-radius:3px;margin-top:10px}.tray-list{border-top:1px solid var(--line);margin-top:20px}.tray-list .list-heading{margin:14px 0 7px}.tray-list button{display:flex;justify-content:space-between;width:100%;font-size:11px;border:0;border-bottom:1px solid #e1e6dd;padding:7px 0;text-align:left}.history{display:flex;flex-wrap:wrap;gap:4px;border-top:1px solid var(--line);padding-top:14px;margin-top:18px}.history button{font-size:10px;padding:6px 7px}#reset{margin-left:auto}.muted{color:var(--muted);font-size:11px}.lesson{grid-column:1/-1;display:flex;gap:25px;align-items:center;background:#e7ecdf;padding:19px 28px;border-block:1px solid #c3cdbb;min-height:100px}.lesson-heading{min-width:154px;font-size:12px}.lesson-heading>span{display:block;font-size:11px;color:var(--muted);margin:8px 0 0 24px}.lesson-body{display:flex;gap:19px;align-items:center;flex:1}.lesson-number{font:38px Georgia,serif;color:#748465}.lesson h2{font-size:15px;margin:0 0 6px;font-weight:600}.lesson p{font-size:12px;line-height:1.4;color:#506048;margin:0;max-width:650px}.lesson-actions{display:flex;gap:7px;flex-shrink:0}.lesson-actions button{font-size:12px}#feedback{min-height:36px;font-size:11px;padding:10px 29px;color:#405a49;background:#f5f7f3;border-bottom:1px solid var(--line)}dialog{border:1px solid var(--line);border-radius:12px;background:var(--panel);color:var(--ink);max-width:650px;width:calc(100% - 40px);max-height:85vh;padding:36px;box-shadow:0 16px 80px #142d3650}dialog::backdrop{background:#193b325a}dialog h2{font:31px Georgia,serif;margin:13px 0 20px}dialog h3{font-size:15px;margin:24px 0 10px}dialog p{line-height:1.65;font-size:13px}dialog a{color:#345e45}.dialog-close{position:absolute;right:12px;top:9px;font-size:24px;border:0;padding:3px 10px}body.scene-failed #loading{padding:20px;font-size:14px}.lesson.off .lesson-body,.lesson.off .lesson-actions{display:none}.lesson.off{min-height:55px;padding-block:12px}.lesson.off .lesson-heading>span{display:none}
@media(min-width:1550px){main{grid-template-columns:240px minmax(550px,1fr) 320px}.manifest{padding-inline:24px}.inspector{padding-inline:28px}.calibre h1{font-size:28px;white-space:nowrap}.part-row{padding-block:8px;font-size:13px}}
@media(max-width:1150px){.header-actions>span{display:none}.masthead{padding:14px 18px;gap:14px}.brand{min-width:220px}.brand strong{font-size:16px}nav button{min-width:78px}main{grid-template-columns:180px minmax(330px,1fr) 245px}.manifest{padding-inline:12px}.inspector{padding-inline:15px}.view-toolbar{padding:12px 10px;align-items:flex-start}.view-toolbar>button{max-width:80px}.view-options{gap:10px;padding-inline:12px}.explode-label{margin-left:0}.transport{align-items:flex-start;padding-inline:12px}.timing select{width:100%;font-size:10px}.time-note{padding-inline:12px;font-size:9px}.lesson{gap:17px;padding-inline:19px}.lesson-heading{min-width:130px}.lesson-actions{flex-direction:column}}
@media(max-width:850px){.masthead{flex-wrap:wrap;min-height:110px}.brand{flex:1}.header-actions{order:2}.header-actions button{font-size:11px;padding:5px}nav{order:3;width:100%;justify-content:center}nav button{flex:1}.brand span{font-size:11px}main{grid-template-columns:175px minmax(0,1fr);grid-template-rows:620px auto auto}.manifest{grid-column:1;grid-row:1}.work-area{grid-column:2;grid-row:1}.inspector{grid-column:1/-1;display:grid;grid-template-columns:1fr 1fr;gap:22px;padding:20px}.inspector #selection{grid-row:1/3}.inspector #mode-content{margin:0;padding:0}.inspector .history{grid-column:1/-1;margin:0}.tray-list{margin:0}.part-sketch{height:70px}.lesson{grid-row:3;padding:16px}.lesson-heading{min-width:115px}.lesson-number{display:none}.lesson-actions{min-width:100px}.view-buttons{max-width:225px}.view-toolbar>button{font-size:10px}.transport{flex-wrap:wrap;gap:8px}.reserve{width:100%;display:grid;grid-template-columns:1fr 1fr;align-items:center;gap:4px 10px}.reserve>div:first-child{grid-column:1}.reserve meter{grid-column:1}.wind-buttons{grid-column:2;grid-row:1/3}.timing{width:100%}.timing select{width:auto}.camera-help{font-size:8px}.tray-label{font-size:10px;right:15px}#dial-inset{width:85px}}
@media(max-width:540px){main{display:flex;flex-direction:column}.work-area{order:0;min-height:640px}.manifest{order:2;border-top:1px solid var(--line);padding:18px}.manifest .calibre{display:none}#part-tree{display:grid;grid-template-columns:1fr 1fr;gap:10px}.manifest-foot{display:none}.manifest .list-heading{margin-top:0}.inspector{order:3;display:block}.lesson{order:1;gap:10px;align-items:flex-start}.lesson-heading{min-width:90px;font-size:11px}.lesson-body{gap:0}.lesson p{font-size:11px}.lesson-actions{min-width:75px}.lesson-actions button{font-size:10px;padding:7px}.brand strong{font-size:16px}.masthead{gap:10px}.brand svg{width:30px}.header-actions{display:flex}#stage{min-height:365px}#mode-content{margin-top:20px!important}.history{margin-top:20px!important}.tray-list{margin-top:20px}.view-toolbar button{font-size:10px}.view-options{font-size:10px;gap:12px}.explode-label input{width:80px}.camera-help{font-size:9px}#dial-inset{bottom:28px}.tray-label{top:30px}.stage-label{font-size:10px}#feedback{padding-inline:18px}dialog{padding:25px}}
.stage-label,.tray-label,.camera-help,#dial-inset>span{background:#edf1e9;color:#40584b;padding:4px 6px;border-radius:3px}#dial-inset>span{display:block}.stage-label{top:2px}
.view-toolbar{flex-wrap:wrap}.view-buttons{flex:1}.lighting-label{display:flex;align-items:center;gap:6px;font-size:11px;color:#455d50}.lighting-label select{max-width:140px;font-size:11px;padding:6px 4px;border:1px solid #bdc8be;border-radius:4px;background:#eef2ec}.escape-phase{position:absolute;left:20px;top:30px;font-size:10px;color:#40584b;background:#edf1e9;padding:4px 6px;border-radius:3px;pointer-events:none}.lighting-label select:focus-visible{outline:3px solid #93732b;outline-offset:2px}
@media(prefers-reduced-motion:reduce){*{transition:none!important;scroll-behavior:auto!important}}

.reference-link{color:inherit;text-decoration:none;padding:9px 12px;border:1px solid #b8c7b1;border-radius:4px;font-size:13px;white-space:nowrap}.reference-link:hover{background:#e2ead9}.reference-link:focus-visible{outline:3px solid #8b762f;outline-offset:3px}

.masthead #modes{flex-wrap:wrap}.masthead #modes>*{flex-shrink:0}