:root{color-scheme:dark;--optica-bg:#10191e;--optica-panel:#172329;--optica-build:#101c22;--optica-ink:#e9f0f0;--optica-ink2:#9bafb7;--optica-accent:#a5ecd1;--optica-ok:#a5ecd1;--ink2:#9bafb7;--mint:#a5ecd1;--line:#2c3b42;--muted:#aabac2;--bg:#10191e;--red:#ff786e;--violet:#b596ff;--blue:#73baff;--green:#86efac;--yellow:#fff0a2;--orange:#ffb579}
*{box-sizing:border-box}html,body{margin:0;background:var(--bg);color:#e9f0f0;font-family:Inter,'Segoe UI',sans-serif;height:100%;font-size:16px;overflow:auto}button,input,select,textarea{font:inherit}button,a,input,select,textarea{touch-action:manipulation}button{cursor:pointer}button:disabled{opacity:.4;cursor:default}button:focus-visible,a:focus-visible,input:focus-visible,textarea:focus-visible,summary:focus-visible,canvas:focus-visible{outline:2px solid var(--mint);outline-offset:4px}button:hover:not(:disabled){border-color:var(--mint)!important}a{color:inherit}h1,h2,p{margin-top:0}[hidden]{display:none!important}.skip-link{position:absolute;top:-80px;z-index:99;background:var(--mint);color:#123;padding:12px}.skip-link:focus{top:0}#optica-root{min-height:100%;height:auto;background:var(--bg)}.optica-shell{border:0;border-radius:0;background:var(--bg);height:auto;min-height:100dvh;font-family:inherit}.optica-shell button{font-size:14px;font-weight:500;padding:9px 12px;min-height:36px;border:1px solid var(--line);background:#1c2a30;border-radius:6px;color:#deeaed;box-shadow:none}.optica-shell button.primary{background:var(--mint);color:#142d25;border-color:var(--mint);font-weight:650}.app-header{height:78px;display:flex;align-items:center;justify-content:space-between;padding:0 32px;border-bottom:1px solid var(--line);gap:20px}.brand{display:flex;align-items:center;gap:11px;font-size:25px;letter-spacing:4px;text-decoration:none;font-weight:720}.brand-symbol{font-size:35px;color:var(--mint);letter-spacing:0}.brand-label{font-family:monospace;font-size:12px;letter-spacing:2px;color:var(--muted);border-left:1px solid var(--line);padding-left:17px;margin-left:8px}.app-header nav{display:flex;align-self:stretch;gap:22px}.optica-shell .nav-tab{background:none;border:0;border-radius:0;font-size:14px;color:var(--muted);padding:0 4px;border-bottom:2px solid transparent}.optica-shell .nav-tab.active{outline:0;color:var(--mint);border-bottom-color:var(--mint)}.workspace-heading{display:flex;justify-content:space-between;align-items:center;padding:28px 32px 25px;gap:20px}.eyebrow,.section-label{font-family:Consolas,monospace;font-size:12px;letter-spacing:1.5px;color:var(--muted);font-weight:500}.eyebrow{color:var(--mint);margin-bottom:9px}h1{font-size:30px;font-weight:550;letter-spacing:-1px;margin-bottom:0}.heading-actions{display:flex;gap:8px}.optica-shell #wrap{grid-template-columns:205px minmax(0,1fr) 280px;gap:0;padding:0 24px 24px;background:var(--bg);flex:1}.journey{padding:15px 23px 10px 7px}.journey-progress{display:flex;justify-content:space-between;font-size:12px;margin-top:22px;color:var(--muted)}.journey-progress strong{font-weight:500;color:#d9e5e9}progress{width:100%;height:4px;margin:12px 0 25px;border:0;border-radius:5px;accent-color:var(--mint)}progress::-webkit-progress-bar{background:#2c3b42;border-radius:5px}progress::-webkit-progress-value{background:var(--mint);border-radius:5px}.chapter-title{font-size:12px;color:var(--muted);margin:15px 0 8px}.optica-shell .journey-level{display:flex;align-items:center;gap:9px;text-align:left;width:100%;background:transparent;border:1px solid transparent;padding:10px 8px;margin:3px 0;font-size:14px;line-height:1.35}.level-number{font-family:monospace;color:var(--muted);font-size:12px;width:19px;flex-shrink:0}.optica-shell .journey-level.active{background:#21372f;outline:0;border-color:#355747;color:var(--mint)}.journey-level.done .level-number{color:var(--mint)}.journey-note{border-top:1px solid var(--line);margin-top:28px;padding-top:22px;color:var(--muted);font-size:13px;line-height:1.6}.journey-note span{color:var(--mint);font-size:25px;display:block;margin-bottom:10px}.journey-note strong{color:#cfdbdf;font-weight:500}.journey-note p{margin-top:6px}
.optica-shell #left{display:flex;flex-direction:column;min-width:0;border:1px solid var(--line);border-radius:11px;overflow:hidden;background:#132027;align-items:stretch;justify-content:flex-start}.experiment-bar{display:flex;align-items:center;justify-content:space-between;padding:15px 19px;border-bottom:1px solid var(--line);font-family:monospace;font-size:12px;color:var(--muted);letter-spacing:1px}.live-dot{display:inline-block;width:6px;height:6px;border-radius:50%;background:var(--mint);margin-right:7px}.view-switch{display:flex;background:#0f191e;border:1px solid var(--line);padding:3px;border-radius:6px}.optica-shell .view-switch button{min-height:27px;font-size:12px;padding:4px 13px;border:0;background:none;color:var(--muted)}.optica-shell .view-switch button[aria-pressed=true]{background:#2a3b43;color:#edf8fa}.objective{display:flex;align-items:center;gap:12px;padding:17px 20px;min-height:77px}.objective-icon{font-size:25px;color:var(--mint)}.objective p{font-size:14px;line-height:1.55;margin:0;flex:1;color:#cbd9df}.objective button{font-size:12px;white-space:nowrap}.canvas-toolbar{display:flex;justify-content:space-between;gap:8px;padding:0 15px 10px}.canvas-toolbar>div{display:flex;gap:5px}.optica-shell .canvas-toolbar button{font-size:12px;min-height:32px;padding:5px 9px;background:transparent}.optica-shell .canvas-toolbar button[aria-pressed=true]{background:#263d3a;border-color:#47675c;color:var(--mint)}.optica-shell #canvasWrap{display:flex;align-items:center;justify-content:center;min-height:280px;height:clamp(330px,46vh,570px);background:#0b161c;box-shadow:none;border-radius:0;padding:12px;overflow:hidden;flex:none}.optica-shell canvas{background:none!important;box-shadow:none;border-radius:0;touch-action:none;max-width:100%;cursor:default}.tray-heading{display:flex;justify-content:space-between;align-items:center;gap:10px;padding:19px 18px 10px;border-top:1px solid var(--line)}#toolInstruction{font-size:12px;color:var(--muted);text-align:right}.optica-shell #palette{display:flex;flex-wrap:wrap;gap:7px;padding:0 16px 16px;background:transparent;min-height:68px;margin:0}.optica-shell .tool-card{display:flex;align-items:center;gap:9px;min-height:48px;padding:8px 11px;background:#1b2c33;outline:0;font-size:14px}.tool-glyph{font-family:monospace;font-size:24px;color:#bee9df}.tool-card small{font-size:12px;color:var(--muted);display:block;margin-top:2px}.optica-shell .tool-card.active{outline:0;border-color:var(--mint);background:#2a443b;color:var(--mint)}.optica-shell .palette-select{max-width:230px;min-height:48px;font-size:14px;background:#1b2c33}.workbench-footer{padding:12px 18px;border-top:1px solid var(--line);display:flex;justify-content:space-between;gap:10px;font-size:12px;color:var(--muted);margin-top:auto}
.optica-shell #right{background:transparent;border:0;overflow:visible;padding:0 0 0 17px;color:#d9e6e9;max-height:none}.inspector-section{padding:19px 13px 20px;border-bottom:1px solid var(--line);font-size:14px}.inspector-section .section-label{margin-bottom:18px}.optica-shell #right details{border:0;border-bottom:1px solid var(--line);border-radius:0;background:transparent;margin:0}.optica-shell #right summary{font-size:14px;font-weight:500;padding:0;color:var(--muted)}.inspector-section h2{font-size:17px;margin-bottom:12px;font-weight:550}.muted,.inspector-section p{color:var(--muted);font-size:14px;line-height:1.65}.session-stats{display:flex;gap:16px;font-size:12px;color:var(--muted);margin-top:18px}.session-stats strong{display:block;color:#e2ebef;font-size:14px;margin-top:5px;font-weight:500}.detector-card{display:flex;align-items:center;gap:10px;padding:10px 0;font-size:14px}.detector-light{border:1px solid #637c89;border-radius:50%;width:21px;height:21px;display:grid;place-items:center;color:var(--muted);font-size:12px}.detector-card.lit .detector-light{border-color:var(--mint);background:#a5ecd122;color:var(--mint)}.detector-card small{display:block;font-size:12px;margin-top:5px;color:var(--muted)}#statusMsg{font-size:13px;line-height:1.6;margin:12px 0 0;color:var(--muted)}#statusMsg.win{color:var(--mint)}#statusMsg.fail{color:#ffb579}.equation{font-family:Georgia,serif;font-style:italic;font-size:25px;letter-spacing:1px;padding:18px 0;color:#c5f3e4}.optica-shell .text-button{border:0;background:none;padding:0;color:var(--mint);font-size:13px}.property-title{display:flex;justify-content:space-between;align-items:center;margin-bottom:15px}.property-title h2{margin:0;font-size:18px}.lock-badge{font-size:12px;padding:4px 6px;border:1px solid var(--line);border-radius:4px;color:var(--muted)}.property-field{display:block;margin:14px 0}.property-field>span{display:flex;justify-content:space-between;color:var(--muted);font-size:14px;margin-bottom:8px}.property-field output{color:#dfebed;font-family:monospace}.optica-shell input:not([type=checkbox]),.optica-shell select,.optica-shell textarea{color:#dce9ed;background:#0f1a20;border:1px solid #3b4b53;padding:8px;font-size:14px;max-width:100%;border-radius:5px}.property-field input:not([type=checkbox]),.property-field select{width:100%}.optica-shell input[type=range]{padding:0;accent-color:var(--mint);height:22px;border:0;background:transparent}.position-fields{display:flex;gap:10px}.position-fields>*{min-width:0;flex:1}.property-buttons{display:flex;gap:6px;margin-top:17px}.property-buttons button{font-size:12px}.property-check{display:flex;gap:8px;font-size:13px;line-height:1.5;color:var(--muted);margin:12px 0}input[type=checkbox]{accent-color:var(--mint)}#measurements{font-family:monospace;font-size:12px;line-height:1.8;margin-bottom:10px;color:var(--mint)}#objectList{margin-top:14px;display:grid;gap:5px}#objectList button{text-align:left;font-size:13px;background:transparent}#editorRules>label{font-size:14px;color:var(--muted);display:block;margin:15px 0 6px}#editorRules>input,#editorRules>textarea{width:100%}.editor-actions{display:flex;gap:6px;flex-wrap:wrap;margin-top:16px}.editor-actions button{font-size:12px}
.hint-card,.success-card{position:absolute;z-index:3;bottom:15px;left:20px;right:20px;padding:16px 20px;border:1px solid #466d5b;background:#182f29f5;border-radius:8px;font-size:14px;line-height:1.6;box-shadow:0 8px 40px #0004}.hint-card button{float:right;margin-left:15px}.success-card{display:flex;align-items:center;justify-content:space-between;gap:14px}.success-card strong{font-size:18px;display:block;color:var(--mint);margin-bottom:3px}.success-card p{margin:0;color:#bfd5ce}.success-card button{white-space:nowrap}.success-actions{display:flex;gap:5px}.hint-card{bottom:auto;top:15px}dialog{background:#16232a;color:#edf4f4;border:1px solid #3a4c55;border-radius:14px;padding:26px;width:min(860px,calc(100vw - 32px));max-height:86dvh;box-shadow:0 25px 100px #0008}dialog::backdrop{background:#040b10cc;backdrop-filter:blur(5px)}.dialog-top{display:flex;align-items:center;justify-content:space-between;gap:15px;margin-bottom:24px}.dialog-top h2{font-size:24px;font-weight:500;margin:0}.dialog-top button,dialog button{background:#25373f;color:#e4edef;border:1px solid #455b65;border-radius:6px;min-height:36px;padding:8px 12px}.dialog-top button{font-size:24px;padding:0 11px}.level-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px}.level-tile{display:flex;flex-direction:column;text-align:left;min-height:152px;padding:19px!important;background:#1a2c33!important;border-color:#34474f!important;gap:9px}.level-tile:hover{border-color:var(--mint)!important}.level-tile small{font-family:monospace;font-size:12px;letter-spacing:1px;color:var(--mint)}.level-tile strong{font-size:17px;font-weight:500}.level-tile p{font-size:13px;line-height:1.6;color:var(--muted);margin:0}.level-tile .stars{color:var(--mint);font-size:12px;margin-top:auto}.dialog-section{font-size:13px;letter-spacing:1px;color:var(--muted);margin:26px 0 12px}.help-copy{font-size:16px;line-height:1.8;color:#bacbd3}.help-copy h3{font-weight:550;color:#ecf6f8}.help-copy a{color:var(--mint)}.help-copy kbd{background:#2f424b;padding:2px 5px;border-radius:4px;color:#fff;font-size:12px}.saved-row{display:flex;align-items:center;gap:10px;flex-wrap:wrap;border-bottom:1px solid var(--line);padding:17px 0}.saved-row>div{flex:1;min-width:160px}.saved-row strong{display:block}.saved-row small{color:var(--muted)}.saved-row button{font-size:12px}.empty-experiments{text-align:center;padding:30px 20px;color:var(--muted)}#toast{position:fixed;bottom:24px;left:50%;transform:translateX(-50%);max-width:calc(100vw - 30px);z-index:100;padding:14px 20px;border:1px solid #647d72;background:#243c33;color:#e7fff4;border-radius:8px;box-shadow:0 10px 35px #0007;font-size:14px}.spectrum{height:3px;background:linear-gradient(90deg,#a797ff,#80c4ff,#99edb4,#ffe592,#ffa06e);border-radius:3px;margin:18px 0}
@media(min-width:1500px){.optica-shell #wrap{grid-template-columns:230px minmax(0,1fr) 310px;max-width:1800px;width:100%;margin:auto}.optica-shell #canvasWrap{height:55vh;max-height:700px}}
@media(max-width:1150px){.brand-label{display:none}.optica-shell #wrap{grid-template-columns:minmax(0,1fr) 260px}.journey{display:none}.app-header{padding:0 22px}.workspace-heading{padding:24px}.app-header nav{gap:15px}.optica-shell #canvasWrap{height:44vh;min-height:320px}}
@media(max-width:750px){.app-header{height:auto;min-height:72px;padding:14px 16px;flex-wrap:wrap;gap:9px}.brand{font-size:22px}.app-header nav{order:3;width:100%;justify-content:space-around;gap:5px}.optica-shell .nav-tab{padding:11px 4px}.brand-symbol{font-size:30px}#helpButton span{display:none}.workspace-heading{padding:20px 16px;align-items:flex-start;gap:12px}h1{font-size:23px;letter-spacing:-.5px}.heading-actions{flex-wrap:wrap;justify-content:flex-end}.heading-actions button{font-size:12px;padding:7px 9px}.eyebrow{font-size:12px}.optica-shell #wrap{display:flex;flex-direction:column;padding:0 12px 20px}.optica-shell #right{padding:10px 0 0;display:grid;grid-template-columns:1fr 1fr;gap:0 10px}.optica-shell #canvasWrap{height:58vw;min-height:230px;max-height:460px;padding:6px}.objective{padding:14px 12px;gap:8px}.objective p{font-size:14px}.experiment-bar{padding:12px;letter-spacing:0}.canvas-toolbar{padding:0 9px 10px;gap:4px;flex-wrap:wrap}.optica-shell .canvas-toolbar button{padding:5px 7px;font-size:12px}.tray-heading{padding:14px 12px 9px}#toolInstruction{max-width:145px}.optica-shell #palette{padding:0 10px 12px}.workbench-footer{padding:10px}.inspector-section{padding:17px 10px}.level-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.level-tile{min-height:150px;padding:13px!important}.success-card{padding:12px;left:10px;right:10px;bottom:10px;flex-wrap:wrap}.success-card strong{font-size:16px}.success-card button{font-size:12px}.hint-card{left:10px;right:10px;padding:12px}.property-title h2{font-size:16px}}
@media(max-width:420px){.optica-shell #right{display:block}.heading-actions{max-width:130px}.level-grid{grid-template-columns:1fr}.workbench-footer #rayCount{display:none}}
@media(prefers-reduced-motion:reduce){*,*::before,*::after{animation:none!important;transition:none!important;scroll-behavior:auto!important}}
/* Keep the document as the single scrolling surface; fit the inspector beside the board. */
html{height:auto;min-height:100%;overflow-x:hidden;overflow-y:auto}body{height:auto;min-height:100dvh;overflow:visible}
.optica-shell #wrap{align-items:start}.optica-shell #left{align-self:start}.optica-shell #right{max-height:calc(100dvh - 215px);min-height:600px;overflow:auto;scrollbar-width:thin;scrollbar-color:#4b655d transparent}.optica-shell #palette .tool-card{background:#1b2c33;border-color:var(--line);color:#deeaed;font-weight:500}.optica-shell #palette .tool-card.active{background:#2a443b;border-color:var(--mint)}.optica-shell #statusMsg{text-align:left;font-weight:400;padding:0;color:var(--muted)}.optica-shell #statusMsg.win{color:var(--mint)}.optica-shell #statusMsg.fail{color:#ffb579}.optica-shell .detlist span{font-weight:400}.optica-shell .detlist .detector-light{display:grid;margin:0}
@media(max-width:750px){.optica-shell #right{min-height:0;max-height:none;overflow:visible}.optica-shell #left{align-self:stretch}}
.optica-shell #right details summary{background:transparent;font-weight:500;color:var(--muted);padding:5px 0;font-size:14px}
.app-header a.nav-tab{display:flex;align-items:center;text-decoration:none}

.draft-status{font-size:12px;padding:8px 18px;color:var(--mint)}.draft-status.error{color:#ffb579}@media(max-width:750px){.app-header nav{flex-wrap:wrap}.optica-shell .nav-tab{font-size:12px;white-space:nowrap}}