:root{--paper:#f4f6f7;--white:#fff;--ink:#1c2b34;--muted:#52616b;--rule:#ced6db;--accent:#a84f31;--soft:#f4e9e1;--field:#f8fafb;--dark:#102834;--focus:#285dcb;--gold:#90631c;--teal:#15696e;--radius:3px;color-scheme:light;font-family:Arial,Helvetica,sans-serif;font-size:16px}
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transparent;font-size:12px}.mode-switch input:checked+span{background:var(--ink);color:var(--white);box-shadow:0 2px 6px #0002}.mode-switch input:focus-visible+span,.metal-options input:focus-visible+span{outline:3px solid var(--focus);outline-offset:3px}.metal-picker legend,.field-legend{font:10px 'Courier New',monospace;color:var(--accent);margin-bottom:12px;letter-spacing:1px}.field-legend span,.metal-picker legend span{font:600 13px Arial,Helvetica,sans-serif;color:var(--ink);letter-spacing:0;margin-left:12px}.metal-options{display:grid;grid-template-columns:repeat(4,1fr);gap:8px}.metal-options span{border:1px solid var(--rule);display:flex;flex-direction:column;align-items:center;justify-content:center;min-height:75px;font-size:10px;background:var(--field)}.metal-options b{font:24px Georgia,serif;line-height:1.2}.metal-options label:nth-child(2) b{color:var(--gold)}.metal-options label:nth-child(3) b{color:#715ab8}.metal-options label:nth-child(4) 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var(--rule);background:var(--white);color:var(--ink);max-width:540px;width:calc(100% - 32px);padding:34px;box-shadow:0 24px 80px #0005}dialog::backdrop{background:#102834b5;backdrop-filter:blur(3px)}dialog h2{font-size:30px;line-height:1.2;margin:18px 0}dialog p{font-size:13px;color:var(--muted);margin:12px 0}dialog .eyebrow{font-size:9px;padding-right:15px}dialog .share-warning{font-size:11px;background:var(--paper);padding:12px}dialog input,dialog textarea{font:11px 'Courier New',monospace}dialog details{font-size:12px;border-top:1px solid var(--rule);margin-top:18px;padding-top:10px}dialog textarea{margin-bottom:10px}.dialog-close{position:absolute;right:10px;top:7px;width:44px;border:0;background:transparent;font-size:24px}.sr-only{position:absolute!important;width:1px!important;height:1px!important;padding:0!important;margin:-1px!important;overflow:hidden!important;clip:rect(0,0,0,0)!important;white-space:nowrap!important;border:0!important}[hidden]{display:none!important}
html[data-theme=dark]{--paper:#101922;--white:#192731;--ink:#e4edf3;--muted:#b3c3cd;--rule:#475966;--accent:#e3a383;--soft:#433127;--field:#14212b;--dark:#0b1c26;--focus:#8db4ff;--gold:#edc477;--teal:#8bcac5;color-scheme:dark}html[data-theme=dark] body{background-image:radial-gradient(ellipse at 92% 8%,#2e293188,transparent 40%)}html[data-theme=dark] .brand img{filter:brightness(0) invert(1)}html[data-theme=dark] .calculate-button{background:#a84f31;border-color:#ca8262}html[data-theme=dark] .mode-switch input:checked+span{background:#c9dbe7;color:#14212b}html[data-theme=dark] .metal-options label:nth-child(3) b{color:#b7a1f0}
html:not([data-effects=on]) *,html:not([data-effects=on]) *:before,html:not([data-effects=on]) *:after{transition:none!important;animation:none!important;scroll-behavior:auto!important}html[data-effects=on] .calculate-button,html[data-effects=on] .share-button{transition:background .18s,filter .18s}
html[data-embed=true] .masthead,html[data-embed=true] .intro,html[data-embed=true] footer,html[data-embed=true] .scene{display:none}html[data-embed=true] main{max-width:960px;padding:0}html[data-embed=true] .instrument{grid-template-columns:1fr;border:0;box-shadow:none}html[data-embed=true] .workbench{padding:24px}html[data-embed=true] .result-sheet{padding:24px}html[data-embed=true] .method{display:block;padding:24px}html[data-embed=true] .method-title{margin-bottom:25px}html[data-embed=true] .method h2{font-size:30px}
@media(min-width:1401px){main,.masthead,footer{max-width:1200px}}@media(max-width:1400px){main,.masthead,footer{margin-left:44px;margin-right:44px}}@media(max-width:1000px){main,.masthead,footer{margin-left:28px;margin-right:28px}.workbench{padding:28px}.scene{padding:28px}.intro-note{min-width:210px;padding-left:20px}.intro{gap:30px}h1{font-size:58px}.instrument{grid-template-columns:.75fr 1.25fr}.bench-top h2{font-size:21px}.year-label{align-items:flex-start;flex-wrap:wrap}.method{grid-template-columns:.75fr 1.25fr;gap:28px}.result-sheet{padding:28px}}
@media(max-width:760px){main,.masthead,footer{margin-left:20px;margin-right:20px}.masthead{min-height:85px}.brand img{width:176px}.masthead-right{gap:12px}.prototype{font-size:8px;max-width:64px;line-height:1.4}.intro{padding:35px 0 28px;display:block}.intro-note{display:none}h1{font-size:48px;letter-spacing:-1.5px;margin-top:15px}.intro-copy{font-size:15px;max-width:450px}.instrument{display:flex;flex-direction:column}.workbench{order:1;padding:25px}.result-sheet{order:2;padding:25px}.scene{order:3;min-height:0;padding:22px 25px;display:grid;grid-template-columns:1fr 1fr;gap:0 10px}.scene-top{grid-column:1/-1}.token-scene{grid-column:2;grid-row:2/4;margin:0 -25px 0 -25px;padding:10px 0}.art-caption{grid-column:1/-1;margin:15px 0 0;max-width:none;font-size:9px;text-align:left}.time-display{grid-column:1;grid-row:2/4;border:0;padding:25px 0 0;justify-content:center}.year-big{font-size:72px;letter-spacing:-3px}.time-caption{font-size:8px;letter-spacing:1px}.year-sub{font-size:10px;max-width:140px}.scene-bottom{display:none}.method{display:block;padding:40px 0}.method-title{margin-bottom:30px}.method h2{font-size:34px}.method h2 br{display:none}.method h2 em{margin-left:6px}.method-content{padding:0}.result-main{gap:15px;align-items:flex-start}.big-value{font-size:45px;letter-spacing:-1.5px}.change-block{padding-left:15px;max-width:170px}.change-block strong{font-size:27px}.change-block>span{font-size:8px}.result-foot{display:block}.share-button{margin-top:16px}.result-status{font-size:8px}.result-heading .eyebrow{font-size:9px;letter-spacing:1px}.empty-result{grid-template-columns:48px 1fr;gap:6px 12px}.empty-result h2{font-size:23px}.empty-result p{font-size:12px}.empty-dash{font-size:42px}footer{display:block;font-size:8px}footer>div{margin-top:12px;justify-content:space-between}.manual-grid{gap:10px}.year-label{align-items:center}.no-script{padding:20px}}
@media(max-width:420px){main,.masthead,footer{margin-left:16px;margin-right:16px}.brand img{width:154px}.masthead-right{gap:8px}.prototype{font-size:7px;max-width:60px}.icon-button{width:40px;height:40px}.intro .eyebrow{font-size:8px;letter-spacing:1.2px}h1{font-size:42px}.workbench,.result-sheet{padding:22px 18px}.bench-top h2{font-size:21px}.currency{font-size:8px}.metal-options{gap:5px}.quantity-row{grid-template-columns:.8fr 1.2fr;gap:9px}.quantity-row select{font-size:12px}.year-label{gap:10px}.year-input input{width:56px}.year-input button{width:28px}.field-legend span{font-size:12px;margin-left:7px}.result-main{display:block}.change-block{border:0;padding:18px 0 0;max-width:none}.change-block strong{display:inline-block;margin-right:10px}.change-block>span{display:block}.change-block p:first-of-type{display:inline-block}.result-status{max-width:120px;text-align:center}.scene{padding:20px 18px}.year-big{font-size:64px}.method h2{font-size:30px}.manual-grid{grid-template-columns:1fr}.bar-label{font-size:11px}.result-heading{gap:8px}dialog{padding:28px 22px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*:before,*:after{animation:none!important;transition:none!important;scroll-behavior:auto!important}}
@media(forced-colors:active){body{background:Canvas}.scene{background:Canvas;color:CanvasText}.scene:before,.token-scene{display:none}.scene *{color:CanvasText}.scene{border:1px solid CanvasText}.bar{background:Highlight!important;border:1px solid CanvasText}.bar-track{border:1px solid CanvasText}.metal-options input:checked+span,.mode-switch input:checked+span{outline:2px solid Highlight}.brand img{filter:none!important}.time-track{background:CanvasText}}
@media print{.masthead-right,form,footer,dialog,.share-button,.scene{display:none!important}.instrument{display:block;box-shadow:none}.result-sheet{border:0}.method{display:block}.method-title{margin-bottom:20px}main,.masthead{margin:0}.intro{padding:20px 0}.intro-note{display:none}.result-content{display:block}body{background:white;color:black}}

.sample-note{font-size:10px;color:var(--muted);margin:-12px 0 18px}
.year-input button{width:44px;min-height:44px}.year-input input{min-height:44px}@media(max-width:420px){.icon-button{width:44px;height:44px}.year-input button{width:44px}.year-label{flex-wrap:wrap}.year-input{margin-left:auto}}

.arrow-icon{width:16px;height:16px;fill:none;stroke:currentColor;stroke-width:1.5;vertical-align:middle}.calculate-button .arrow-icon{width:20px;height:20px}.share-button .arrow-icon,.intro-note .arrow-icon{margin-left:18px}

.text-button{font-size:10px;border:0;background:transparent;padding:8px 0;color:var(--muted);text-decoration:underline;text-underline-offset:3px;min-height:44px}.big-value,.change-block strong,.bar-label strong,.calculation-detail p{overflow-wrap:anywhere}.result-main>div{min-width:0}

/* Production integration: static original artwork, no coin animation or motion controls. */
.tool-nav{display:flex;align-items:center;gap:20px;font-size:12px}.tool-nav a{text-decoration:none}.tool-nav a:hover{text-decoration:underline}.history-art{margin:28px -34px 14px;position:relative}.history-art picture,.history-art img{display:block;width:100%;height:auto}.history-art figcaption{padding:12px 34px 0;color:#b8ceda;font-size:10px;line-height:1.5}.metal-symbol{font:42px Georgia,serif;color:#d8b99c;margin:3px 0 20px}.scene{min-height:740px}.scene .time-display{margin-top:auto}.masthead .brand img{max-width:212px;width:100%}footer>div{display:flex;gap:20px}.sample-note{line-height:1.6}
@media(max-width:700px){.masthead{padding:16px 0;gap:15px;flex-wrap:wrap}.masthead-right{gap:16px}.tool-nav{gap:14px;font-size:11px}.history-art{margin:20px -22px 12px}.history-art figcaption{padding-inline:22px}.scene .metal-symbol{margin-bottom:12px}.scene{min-height:0}.scene .time-display{padding-top:20px}footer>div{flex-wrap:wrap;gap:14px}}

.tool-explore{display:flex;flex-wrap:wrap;justify-content:center;gap:14px 24px;max-width:1200px;margin:30px auto 0;padding:20px 24px;border-block:1px solid var(--rule);font-size:11px}.tool-explore a{text-decoration:none}.tool-explore a:hover{text-decoration:underline}html[data-embed=true] .tool-explore{display:none}

/* Section titles stand on their own, without decorative step numbers. */
.method-item{display:block}.field-legend span,.metal-picker legend span{margin-left:0}