/* Accents from the paper’s plots/colours.gnuplot; neutral backgrounds and readable tints. */
@font-face{font-family:Lab;src:url('../src/fonts/NotoSansDisplay-Regular.ttf') format('truetype');font-display:swap}
:root{--paper:#F5F4F8;--ink:#27243B;--accent:#785EF0;--line:#D9D6E3;--muted:#767084;--mono:'Courier New',monospace;--panel:#FDFCFF;--panel-border:#9990B0;--shadow:#E2DDEC;--selection:#EDE8FD;--track:#DFDCE8;--secondary:#716780;--control-border:#C7C0D6;--selected-ink:#FFFFFF;--selected-shadow:#D2C8F8;color-scheme:light}
*{box-sizing:border-box}body{margin:0;background:var(--paper);color:var(--ink);font-family:Lab,Arial,sans-serif}button,input{font:inherit}button{cursor:pointer;color:inherit;border-radius:0;touch-action:manipulation}button:focus-visible,input:focus-visible{outline:3px solid #FE6100;outline-offset:4px}@media(hover:hover) and (pointer:fine){button:hover{filter:brightness(.93)}}
.sandbox{width:min(100% - 64px,1000px);margin:auto;padding:45px 0 40px}.title{text-align:center;margin-bottom:30px}h1{font:700 clamp(30px,4.5vw,53px)/1.08 var(--mono);letter-spacing:-2.5px;margin:0}h1>span:first-of-type{color:var(--accent)}.spark{font-size:.55em;vertical-align:top;margin-left:10px;color:#FFB000}.title p{font-size:14px;color:var(--muted);margin:14px 0 0;letter-spacing:.3px}
.chip-panel{border:1px solid var(--panel-border);background:var(--panel);box-shadow:5px 5px 0 var(--shadow)}.chip-toolbar{display:flex;align-items:center;gap:10px;padding:12px 18px}.paint-tools{display:flex;gap:6px;align-items:center}.paint-tools>span{font:11px var(--mono);margin-right:6px;color:var(--muted)}.paint-tools button{display:flex;align-items:center;gap:7px;background:transparent;border:1px solid var(--line);font:11px var(--mono);padding:9px 12px;min-height:40px}.paint-tools button.selected{border-color:var(--accent);background:var(--selection)}.swatch{width:8px;height:8px;display:block}.swatch.app{background:#009E73}.swatch.network{background:#648FFF}.paint-hint{margin-left:auto;color:var(--muted);font:10px var(--mono)}.icon-button{background:transparent;border:1px solid var(--line);font:16px var(--mono);width:40px;height:40px;position:relative;flex-shrink:0}#play{font-size:0}#play::before,#play::after{content:'';position:absolute;top:13px;width:4px;height:12px;background:var(--ink)}#play::before{left:13px}#play::after{left:22px}#play.is-paused::before{background:none;width:0;height:0;border-left:11px solid var(--ink);border-top:7px solid transparent;border-bottom:7px solid transparent;left:15px;top:12px}#play.is-paused::after{display:none}
.power-strip{display:flex;align-items:center;gap:16px;padding:12px 20px;font:11px var(--mono);border-top:1px solid var(--line)}.power-strip>span{width:150px;flex-shrink:0}.power-track{flex:1;height:11px;background:var(--track)}.power-track i{display:block;height:100%;width:0;background:var(--accent)}.power-strip strong{min-width:74px;text-align:right;font-weight:normal;font-variant-numeric:tabular-nums}.temperature-strip #temperature{background:#648FFF}.temperature-strip #temperature.warm{background:#FFB000}.temperature-strip #temperature.limited{background:#DC267F}
.chip-stage{position:relative;background:#1D1C30}canvas{display:block;width:100%;height:auto;image-rendering:pixelated}.core-buttons{position:absolute;inset:0}.core-button{position:absolute;background:transparent;border:2px solid transparent;padding:0;min-width:0}@media(hover:hover) and (pointer:fine){.core-button:hover{border-color:#C9BAFF;background:#785EF014;filter:none}}.core-button:focus-visible{outline:3px solid #FFB000;outline-offset:1px}
.metrics{display:grid;grid-template-columns:repeat(3,1fr);padding:23px 0 24px}.metrics>div{padding:0 26px;border-right:1px solid var(--line)}.metrics>div:last-child{border:0}.metrics h2{font-size:12px;font-weight:400;color:var(--secondary);margin:0 0 9px}.metrics p{margin:0;display:flex;align-items:baseline;gap:10px}.metrics strong{font:700 32px var(--mono);letter-spacing:-1.5px;font-variant-numeric:tabular-nums}.metrics p>span{font:9px var(--mono);color:var(--muted)}
.controls{display:grid;grid-template-columns:2fr 1fr;gap:36px;margin-top:30px}fieldset{border:0;padding:0;margin:0;min-width:0}legend{font-size:12px;padding:0;margin-bottom:12px;color:var(--secondary)}.rectangles{display:grid;grid-template-columns:repeat(4,1fr);gap:6px}.rectangles button{min-height:44px;border:1px solid var(--control-border);background:transparent;padding:10px 7px;font:11px var(--mono);white-space:nowrap}.rectangles button.selected{background:var(--accent);border-color:var(--accent);color:var(--selected-ink);box-shadow:2px 2px 0 var(--selected-shadow)}.burst-control input{width:100%;accent-color:var(--accent);margin:4px 0 0;min-height:30px;cursor:pointer}.range-labels{display:flex;justify-content:space-between;color:var(--muted);font:10px var(--mono);margin-top:2px}.range-labels span.active{color:var(--accent);font-weight:bold}.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}
@media(max-width:800px){.sandbox{width:calc(100% - 36px);padding-top:30px}.controls{gap:24px;grid-template-columns:1fr}.paint-hint{font-size:9px}.metrics>div{padding:0 18px}.metrics h2{font-size:11px}.metrics strong{font-size:27px}.metrics p{gap:6px}.metrics p>span{font-size:8px}.chip-toolbar{padding:10px 12px}}
@media(max-width:520px){.sandbox{width:calc(100% - 24px);padding-top:25px}h1{font-size:clamp(24px,6.5vw,34px);letter-spacing:-1.5px}.title{margin-bottom:23px}.title p{font-size:12px;margin-top:12px}.spark{margin-left:5px}.chip-toolbar{flex-wrap:wrap;gap:6px;padding:10px}.paint-tools{gap:4px}.paint-tools>span{font-size:10px;margin-right:3px}.paint-tools button{font-size:10px;padding:8px 9px}.paint-hint{order:3;width:100%;margin:2px 0 0;font-size:9px}.chip-toolbar>.icon-button:first-of-type{margin-left:auto}.power-strip{font-size:9px;padding:11px 10px;gap:10px}.power-strip>span{width:120px}.power-strip .power-track{height:10px}.power-strip strong{min-width:59px}.metrics{padding:18px 0}.metrics>div{padding:0 10px}.metrics h2{font-size:10px;line-height:1.4;min-height:28px;margin-bottom:5px}.metrics strong{font-size:25px;letter-spacing:-1px}.metrics p{gap:4px;flex-wrap:wrap}.metrics p>span{font-size:8px}.controls{gap:20px;margin-top:24px}legend{margin-bottom:10px;font-size:12px}.rectangles{grid-template-columns:1fr 1fr;gap:8px}.rectangles button{font-size:12px}.burst-control input{min-height:35px}}

.title{position:relative}.help-button{position:absolute;right:0;top:5px;border:1px solid var(--line);background:transparent;color:var(--accent);padding:10px 12px;min-height:40px;font:11px var(--mono)}
dialog{width:min(600px,calc(100% - 28px));max-height:85vh;overflow:auto;border:1px solid var(--panel-border);background:var(--paper);color:var(--ink);padding:24px 28px;box-shadow:6px 6px 0 #241B3D55}dialog::backdrop{background:#18142BD1}.help-heading{display:flex;justify-content:space-between;align-items:center;gap:20px;margin-bottom:16px}.help-heading h2{font:700 24px var(--mono);letter-spacing:-1px;margin:0}dialog p,dialog dd{font-size:13px;line-height:1.6}dialog p{margin:12px 0}.strategy-guide{margin:18px 0}.strategy-guide>div{border-top:1px solid var(--line);padding:12px 0}.strategy-guide dt{font:700 12px var(--mono);color:var(--accent);margin-bottom:5px}.strategy-guide dd{margin:0}.help-note{color:var(--muted)}.help-done{border:1px solid var(--accent);background:var(--accent);color:var(--selected-ink);padding:11px 20px;margin-top:6px;font:12px var(--mono)}
@media(max-width:800px){.help-button{position:static;display:block;margin:0 0 16px auto}.title{margin-top:-10px}}@media(max-width:520px){dialog{padding:18px}.help-heading h2{font-size:21px}dialog p,dialog dd{font-size:12px}.help-button{font-size:10px;padding:9px 12px}}

.help-section h3{font:700 15px var(--mono);margin:22px 0 10px;color:var(--ink)}.help-section .strategy-guide{margin:0 0 18px}.help-section p{margin:8px 0 14px}

/* Phone controls: generous hit areas, readable readouts, no sticky touch hover. */
@media(max-width:520px){
 .chip-toolbar{display:grid;grid-template-columns:minmax(0,1fr) 44px 44px;align-items:center;gap:8px}
 .paint-tools>span{display:none}.paint-tools button{min-height:44px;font-size:11px}.paint-tools{gap:6px}
 .icon-button{width:44px;height:44px}.chip-toolbar>.icon-button:first-of-type{margin-left:0}
 #play::before,#play::after{top:15px}#play::before{left:15px}#play::after{left:24px}
 #play.is-paused::before{left:17px;top:14px}
 .paint-hint{grid-column:1/-1;order:initial;font-size:11px;line-height:1.4;margin:2px 0 0}
 .help-button,.help-done{min-height:44px;font-size:12px}

 .metrics h2{font-size:11px;min-height:32px}.metrics p{display:block}.metrics strong{font-size:27px;line-height:1.3}
 .metrics p>span{display:block;font-size:10px;line-height:1.5;margin-top:3px}
 .power-strip{font-size:10px}.power-strip>span{width:120px}.power-strip strong{min-width:60px}
 legend{font-size:13px}.burst-control input{min-height:44px}.range-labels{font-size:12px}
 dialog{max-height:calc(100vh - 24px);max-height:calc(100dvh - 24px);overscroll-behavior:contain}
 .help-heading{position:sticky;top:0;background:var(--paper);z-index:2;padding:8px 0;box-shadow:0 -20px 0 var(--paper);border-bottom:1px solid var(--line)}
 dialog p,dialog dd{font-size:14px;line-height:1.55}.help-section h3{font-size:16px}.strategy-guide dt{font-size:14px}
 .sandbox{padding-bottom:max(32px,env(safe-area-inset-bottom))}
}
html:has(dialog[open]){overflow:hidden}
/* Keep help dismissible in short landscape viewports too. */
.help-heading{position:sticky;top:0;background:var(--paper);z-index:2;padding:8px 0;box-shadow:0 -28px 0 var(--paper);border-bottom:1px solid var(--line)}
@media(pointer:coarse){
 .icon-button{width:44px;height:44px}.paint-tools button,.help-button,.help-done{min-height:44px}
 #play::before,#play::after{top:15px}#play::before{left:15px}#play::after{left:24px}
 #play.is-paused::before{left:17px;top:14px}.burst-control input{min-height:44px}
}
button{-webkit-tap-highlight-color:transparent}
@media(max-width:520px){
 .chip-toolbar .paint-tools{grid-column:1;grid-row:1}
 .chip-toolbar #play{grid-column:2;grid-row:1}
 .chip-toolbar #reset{grid-column:3;grid-row:1}
 .chip-toolbar .paint-hint{grid-row:2}
}

.swatch.free{background:#817995}
@media(max-width:520px){.paint-tools{gap:3px}.paint-tools>span{display:none}.paint-tools button{font-size:10px;padding:8px 6px}.chip-toolbar{gap:4px;padding:8px}.chip-toolbar>.icon-button{min-width:44px}.paint-hint:empty{display:none}}
@media(max-width:520px){.paint-tools{flex:0 0 100%;display:flex}.paint-tools button{flex:1;min-height:44px}.chip-toolbar{flex-wrap:wrap}.chip-toolbar>.icon-button:first-of-type{margin-left:auto}}
@media(max-width:520px){.chip-toolbar .paint-tools{grid-column:1 / -1;grid-row:1}.chip-toolbar #play{grid-column:2;grid-row:2}.chip-toolbar #reset{grid-column:3;grid-row:2}}

/* Plum neutrals echo the chip canvas; brighter lavender keeps small text legible. */
:root[data-theme="dark"]{color-scheme:dark;--paper:#171622;--panel:#242232;--ink:#F0EDF7;--accent:#BAA8FF;--line:#4D475F;--muted:#B9B1C9;--panel-border:#696078;--shadow:#100F19;--selection:#39314F;--track:#494258;--secondary:#C2B9D1;--control-border:#6B617D;--selected-ink:#211A34;--selected-shadow:#413456}
.title-actions{display:flex;flex-wrap:wrap;justify-content:flex-end;align-items:center;gap:8px;margin-bottom:18px}
.title-actions .help-button{position:static;margin:0}
.guide-actions{display:flex;align-items:center;gap:8px}
.theme-toggle{display:inline-flex;align-items:center;justify-content:center;color:var(--accent)}
.theme-sun{display:none}
[data-theme="dark"] .theme-sun{display:block}
[data-theme="dark"] .theme-moon{display:none}

.paper-reference{display:inline-flex;align-items:center;gap:6px;margin-right:auto;min-height:44px;color:var(--accent);font:11px var(--mono);text-decoration:underline;text-underline-offset:3px}
.paper-reference:hover{color:var(--ink)}
.paper-reference:focus-visible{outline:3px solid #FE6100;outline-offset:4px}

/* Turt's small RPG dialogue: readable labels outside the pixel illustration. */
#tutorial{width:min(560px,calc(100% - 28px));max-width:calc(100% - 28px);padding:14px 18px;border:3px solid var(--ink);outline:3px solid var(--paper);box-shadow:6px 6px 0 #14142655;max-height:calc(100dvh - 32px)}
#tutorial::backdrop{background:#18142BA6}
.tutorial-heading,.tutorial-footer,.tutorial-footer>div,.help-footer{display:flex;align-items:center;justify-content:space-between;gap:12px}
.tutorial-heading>span{font:700 11px var(--mono);color:var(--accent);letter-spacing:1px}
.tutorial-secondary{min-height:44px;padding:8px 10px;border:1px solid var(--control-border);background:transparent;font:12px var(--mono);color:var(--secondary)}
.tutorial-secondary:disabled{opacity:.4;cursor:default}
.tutorial-example{width:100%;max-width:360px;margin:10px auto 14px;background:#1D1C30;border:1px solid var(--panel-border);box-shadow:3px 3px 0 var(--shadow)}
.tutorial-example-heading{display:flex;justify-content:space-between;align-items:center;gap:12px;padding:12px 12px 4px;font:10px/1.4 var(--mono);color:#C8BFDA}
#tutorial-state{text-align:right;color:#DED2FF}
#tutorial-state[data-state="hot"]{color:#FF91B4}#tutorial-state[data-state="cool"]{color:#BCD0FF}
.tutorial-example canvas{width:100%;aspect-ratio:5/2;image-rendering:pixelated}
.tutorial-example-meter{display:flex;align-items:center;justify-content:space-between;gap:10px;padding:8px 12px 12px;min-height:34px;color:#D6CDE6;font:11px/1.5 var(--mono)}
.tutorial-heat-track{flex:0 0 70px;height:6px;background:#494258}
.tutorial-heat-track[hidden]{display:none}
.tutorial-heat-track i{display:block;height:100%;background:#FFB000}
#tutorial-heat[data-state="hot"]{background:#DC267F}#tutorial-heat[data-state="cool"]{background:#A3B7EA}
.tutorial-example figcaption{background:var(--selection);border-top:1px solid var(--panel-border);padding:10px 12px;font:10px/1.5 var(--mono);color:var(--secondary);text-align:center;text-wrap:balance}
.tutorial-dialogue{display:grid;grid-template-columns:80px minmax(0,1fr);column-gap:16px;grid-template-rows:min-content 1fr;align-items:start;padding:0 0 14px}
.turtle-guide{grid-row:1 / 3;text-align:center;padding-top:3px}
.turtle-guide>span{display:inline-block;margin-top:8px;padding:4px 8px;background:var(--selection);font:700 10px/1 var(--mono);color:var(--accent);letter-spacing:1.5px}
.turtle-sprite{position:relative;width:80px;height:64px;isolation:isolate;animation:turtle-walk .8s steps(1,end) infinite}
.turtle-sprite canvas{position:absolute;inset:0;width:80px;height:64px;image-rendering:pixelated}
#turtle-a{animation:turtle-frame-a .8s steps(1,end) infinite}
#turtle-b{animation:turtle-frame-b .8s steps(1,end) infinite}
#tutorial-title{margin:0;font:700 18px/1.35 var(--mono);letter-spacing:-.5px;text-wrap:balance}
#tutorial-text{font-size:14px;line-height:1.5;margin:8px 0 0;grid-column:2}
.tutorial-footer{border-top:1px solid var(--line);padding-top:10px}
#tutorial-progress{font:12px var(--mono);color:var(--secondary);font-variant-numeric:tabular-nums;white-space:nowrap}
#tutorial-next{min-height:44px;min-width:112px;margin:0;font-weight:bold}
.help-footer{justify-content:flex-start;flex-wrap:wrap;margin-top:18px}
.help-footer .help-done{margin:0}
@keyframes turtle-frame-a{0%{visibility:visible}50%{visibility:hidden}}
@keyframes turtle-frame-b{0%{visibility:hidden}50%{visibility:visible}}
@keyframes turtle-walk{0%{transform:translateY(0)}50%{transform:translateY(-2px)}}
@media(max-height:720px){
 .tutorial-example-heading{padding:8px 10px 2px}
 .tutorial-example-meter{padding:6px 10px 8px;min-height:28px}
 .tutorial-example figcaption{display:none}
}
@media(max-width:520px){
 #tutorial{padding:12px 14px;scrollbar-gutter:auto}
 .tutorial-heading{gap:6px}.tutorial-heading>span{font-size:10px;letter-spacing:.5px}
 .tutorial-example{margin:12px 0 16px}
 .tutorial-example-heading{font-size:9px;padding:10px 10px 4px;gap:8px}
 .tutorial-example-meter{font-size:10px;padding:6px 10px 10px;min-height:32px}
 .tutorial-example figcaption{font-size:9px;padding:8px 10px}
 .tutorial-heat-track{flex-basis:44px}
 .tutorial-dialogue{grid-template-rows:auto auto;column-gap:14px;row-gap:8px;min-height:0;padding-bottom:16px;align-items:center}
 .turtle-guide{grid-row:1;padding-top:0}.turtle-guide>span{margin-top:4px}
 #tutorial-title{font-size:17px}#tutorial-text{grid-column:1 / -1;font-size:14px;line-height:1.5;margin:0}
 .tutorial-footer,.tutorial-footer>div{gap:8px}
 .tutorial-footer{padding-top:12px}.tutorial-secondary{font-size:11px}#tutorial-next{min-width:104px}
}
@media(max-height:520px) and (min-width:560px){
 #tutorial{width:min(820px,calc(100% - 32px));padding:12px 18px}
 #tutorial[open]{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);column-gap:22px;align-items:center}
 .tutorial-heading,.tutorial-footer{grid-column:1 / -1}
 .tutorial-example{width:100%;max-width:310px;justify-self:center;margin:8px 0 10px}
 .tutorial-example-heading{font-size:9px;padding:8px 10px 2px}
 .tutorial-example-meter{font-size:10px;padding:4px 10px 8px;min-height:28px}
 .tutorial-example figcaption{font-size:9px;padding:6px 10px}
 .tutorial-dialogue{grid-template-columns:80px minmax(0,1fr);grid-template-rows:auto auto;column-gap:12px;row-gap:8px;align-items:center;min-height:0;padding:10px 0}
 .turtle-guide{grid-row:1}.turtle-guide>span{margin-top:4px}
 #tutorial-title{font-size:16px}#tutorial-text{grid-column:1 / -1;font-size:13px;line-height:1.5;margin:0}
 .tutorial-footer{padding-top:10px}
}
@media(max-width:520px) and (max-height:700px){
 .tutorial-example{margin:10px 0 12px}.tutorial-example figcaption{display:none}
 .tutorial-dialogue{padding-bottom:12px}
}
@media(max-height:360px) and (min-width:560px){
 #tutorial{padding:10px 14px}
 #tutorial[open]{grid-template-columns:minmax(0,.8fr) minmax(0,1.2fr);column-gap:16px}
 .tutorial-example figcaption{display:none}
 .tutorial-example{margin:6px 0}
 .tutorial-example-heading{font-size:8px;padding:6px 8px 2px}
 .tutorial-example-meter{font-size:9px;padding:4px 8px 6px}
 .tutorial-dialogue{grid-template-columns:40px minmax(0,1fr);padding:6px 0;row-gap:6px;column-gap:10px}
 .turtle-sprite,.turtle-sprite canvas{width:40px;height:32px}
 .turtle-guide>span{font-size:8px;padding:3px 5px;letter-spacing:1px}
 #tutorial-title{font-size:15px}#tutorial-text{font-size:12px;line-height:1.45}
 .tutorial-footer{padding-top:8px}
}
@media(prefers-reduced-motion:reduce){
 .turtle-sprite,#turtle-a,#turtle-b{animation:none}#turtle-b{display:none}
}