@font-face{font-family:DM Sans;font-style:normal;font-display:swap;font-weight:400;src:url(/assets/dm-sans-latin-ext-400-normal-BtiwyxMk.woff2)format("woff2"),url(/assets/dm-sans-latin-ext-400-normal-BjWJ59Pq.woff)format("woff");unicode-range:U+100-2BA,U+2BD-2C5,U+2C7-2CC,U+2CE-2D7,U+2DD-2FF,U+304,U+308,U+329,U+1D00-1DBF,U+1E00-1E9F,U+1EF2-1EFF,U+2020,U+20A0-20AB,U+20AD-20C0,U+2113,U+2C60-2C7F,U+A720-A7FF}@font-face{font-family:DM Sans;font-style:normal;font-display:swap;font-weight:400;src:url(/assets/dm-sans-latin-400-normal-CW0RaeGs.woff2)format("woff2"),url(/assets/dm-sans-latin-400-normal-BwCSEQnW.woff)format("woff");unicode-range:U+??,U+131,U+152-153,U+2BB-2BC,U+2C6,U+2DA,U+2DC,U+304,U+308,U+329,U+2000-206F,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD}@font-face{font-family:DM Sans;font-style:normal;font-display:swap;font-weight:500;src:url(/assets/dm-sans-latin-ext-500-normal-BJfUCQsA.woff2)format("woff2"),url(/assets/dm-sans-latin-ext-500-normal-DR84L5F-.woff)format("woff");unicode-range:U+100-2BA,U+2BD-2C5,U+2C7-2CC,U+2CE-2D7,U+2DD-2FF,U+304,U+308,U+329,U+1D00-1DBF,U+1E00-1E9F,U+1EF2-1EFF,U+2020,U+20A0-20AB,U+20AD-20C0,U+2113,U+2C60-2C7F,U+A720-A7FF}@font-face{font-family:DM Sans;font-style:normal;font-display:swap;font-weight:500;src:url(/assets/dm-sans-latin-500-normal-B9HHJjqV.woff2)format("woff2"),url(/assets/dm-sans-latin-500-normal-Dr3UlScf.woff)format("woff");unicode-range:U+??,U+131,U+152-153,U+2BB-2BC,U+2C6,U+2DA,U+2DC,U+304,U+308,U+329,U+2000-206F,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD}@font-face{font-family:Instrument Serif;font-style:normal;font-display:swap;font-weight:400;src:url(/assets/instrument-serif-latin-ext-400-normal-C2je3j2s.woff2)format("woff2"),url(/assets/instrument-serif-latin-ext-400-normal-CFCUzsTy.woff)format("woff");unicode-range:U+100-2BA,U+2BD-2C5,U+2C7-2CC,U+2CE-2D7,U+2DD-2FF,U+304,U+308,U+329,U+1D00-1DBF,U+1E00-1E9F,U+1EF2-1EFF,U+2020,U+20A0-20AB,U+20AD-20C0,U+2113,U+2C60-2C7F,U+A720-A7FF}@font-face{font-family:Instrument Serif;font-style:normal;font-display:swap;font-weight:400;src:url(/assets/instrument-serif-latin-400-normal-DnYpCC2O.woff2)format("woff2"),url(/assets/instrument-serif-latin-400-normal-BVbkICAY.woff)format("woff");unicode-range:U+??,U+131,U+152-153,U+2BB-2BC,U+2C6,U+2DA,U+2DC,U+304,U+308,U+329,U+2000-206F,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD}@font-face{font-family:Instrument Serif;font-style:italic;font-display:swap;font-weight:400;src:url(/assets/instrument-serif-latin-ext-400-italic-C9HzH3YL.woff2)format("woff2"),url(/assets/instrument-serif-latin-ext-400-italic-D7-lnxEk.woff)format("woff");unicode-range:U+100-2BA,U+2BD-2C5,U+2C7-2CC,U+2CE-2D7,U+2DD-2FF,U+304,U+308,U+329,U+1D00-1DBF,U+1E00-1E9F,U+1EF2-1EFF,U+2020,U+20A0-20AB,U+20AD-20C0,U+2113,U+2C60-2C7F,U+A720-A7FF}@font-face{font-family:Instrument Serif;font-style:italic;font-display:swap;font-weight:400;src:url(/assets/instrument-serif-latin-400-italic-DKMiL14s.woff2)format("woff2"),url(/assets/instrument-serif-latin-400-italic-u__WvvIK.woff)format("woff");unicode-range:U+??,U+131,U+152-153,U+2BB-2BC,U+2C6,U+2DA,U+2DC,U+304,U+308,U+329,U+2000-206F,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD}:root{color:#e8e9e3;font-synthesis:none;--muted:#9aa5a7;--line:#2a3439;--accent:#d1e4ac;--warm:#e9c897;background:#0b1014;font-family:DM Sans,sans-serif}*{box-sizing:border-box}body{margin:0}a{color:inherit;text-decoration:none}button,input,select,textarea{font:inherit}button,a,input,select,textarea{outline-offset:5px}button:focus-visible,a:focus-visible,input:focus-visible,select:focus-visible,textarea:focus-visible{outline:2px solid var(--accent)}button{cursor:pointer;color:inherit;border:1px solid var(--line);background:0 0;border-radius:3px;min-height:42px;padding:9px 15px}button:hover,a:hover{color:var(--accent)}a,button{transition:color .2s,background .2s}button.selected{color:var(--accent);background:#1c291e;border-color:#708466}input[type=range]{accent-color:var(--accent);width:100%;min-height:30px}input[type=checkbox]{accent-color:var(--accent)}.site-header{border-bottom:1px solid var(--line);align-items:center;gap:45px;max-width:1512px;height:105px;margin:auto;padding:0 5%;display:flex}.wordmark{letter-spacing:3px;align-items:center;gap:20px;font-size:27px;font-weight:600;display:flex}.wordmark span{letter-spacing:1.2px;max-width:125px;color:var(--muted);font-size:9px;font-weight:400;line-height:1.8}nav{gap:32px;margin-left:auto;font-size:13px;display:flex}button.language{border:0;border-left:1px solid var(--line);border-radius:0;padding-left:26px;font-size:12px}main{max-width:1512px;margin:auto;padding:0 5%}.home-intro{grid-template-columns:1.2fr .65fr;align-items:end;column-gap:12%;padding:55px 0 47px;display:grid;position:relative}.eyebrow{color:#bac3ba;letter-spacing:1.4px;grid-column:1/-1;align-items:center;gap:12px;margin-bottom:25px;font-size:11px;display:flex}.little-cross{color:var(--accent);font-size:22px}h1{letter-spacing:-2.5px;margin:0;font-family:Instrument Serif,serif;font-size:clamp(50px,6.4vw,91px);font-weight:400;line-height:1.02}h1 em{color:var(--accent);font-weight:400}.intro-side p{color:#acb4b5;max-width:350px;margin:0 0 24px;font-size:14px;line-height:1.9}.text-link{color:var(--accent);border-bottom:1px solid #65705d;justify-content:space-between;padding:0 0 12px;font-size:13px;display:flex}.orbital-instrument{background:#0c1319;border:1px solid #344047;position:relative}.instrument-bar{letter-spacing:1.5px;color:#9cabaf;border-bottom:1px solid #243139;justify-content:space-between;align-items:center;padding:16px 23px;font-size:10px;display:flex}.status-dot{background:var(--accent);border-radius:50%;width:5px;height:5px;margin-right:10px;display:inline-block}.scene-wrap{background:radial-gradient(at 42% 45%,#18242c44,#0000 62%);height:440px;position:relative;overflow:hidden}.orbit-canvas{width:100%;height:100%}.orbit-canvas canvas{display:block}.scene-caption{pointer-events:none;flex-direction:column;gap:8px;display:flex;position:absolute;top:25px;left:25px}.scene-caption span{letter-spacing:1px;color:#bec9c9;font-size:10px}.scene-caption small{color:#7f949e;font-family:monospace;font-size:11px}.scene-scale{color:#81919a;letter-spacing:1px;font-size:9px;position:absolute;bottom:24px;left:25px}.view-controls{gap:5px;display:flex;position:absolute;bottom:17px;right:20px}.view-controls button{background:#0c1319bb;min-height:33px;padding:7px 10px;font-size:10px}.telemetry{border-top:1px solid #243139;grid-template-columns:repeat(4,1fr);padding:19px 0;display:grid}.telemetry>div{border-right:1px solid #28333a;padding:0 25px}.telemetry>div:last-child{border:0}.telemetry small{color:#8f9da5;letter-spacing:1px;margin-bottom:8px;font-size:9px;display:block}.telemetry strong{font-family:monospace;font-size:21px;font-weight:400}.telemetry em{color:#81919a;font-size:11px;font-style:normal}.transport{border-top:1px solid #243139;align-items:center;gap:10px;padding:12px 23px;display:flex}.transport button{border:0;font-size:11px}.transport .round{width:36px;min-height:36px;color:var(--accent);border:1px solid #526051;border-radius:50%;padding:0}.check{align-items:center;gap:6px;font-size:11px;display:flex}.rate{color:var(--muted);align-items:center;gap:10px;margin-left:auto;font-size:11px;display:flex}select{color:#e5e8df;border:1px solid var(--line);background:#111b22;padding:8px}.below-scene{grid-template-columns:1fr 1.1fr 1fr;align-items:start;gap:45px;padding:43px 0 65px;display:grid}.below-scene>p:first-child{letter-spacing:1px;color:var(--muted);font-size:9px}h2{margin:0 0 20px;font-family:Instrument Serif,serif;font-size:29px;font-weight:400;line-height:1.35}.below-scene>p{color:var(--muted);margin:0;font-size:13px;line-height:1.9}.below-scene>a{color:var(--accent);grid-column:3;font-size:12px}footer{border-top:1px solid var(--line);align-items:center;gap:30px;padding:30px 0;font-size:12px;display:flex}footer span{color:var(--muted)}footer a{color:#c7d4be;margin-left:auto}.control-grid{border-top:1px solid var(--line);grid-template-columns:repeat(3,1fr);gap:24px;padding:24px;display:grid}.slider-label{color:#b4c0c4;font-size:12px;display:block}.slider-label span{justify-content:space-between;gap:10px;min-height:35px;display:flex}.slider-label output{color:var(--warm);font-family:monospace}.readings{border-top:1px solid var(--line);padding:20px 24px}summary{cursor:pointer;font-size:13px}table{border-collapse:collapse;width:100%;margin-top:18px;font-size:12px}td,th{text-align:left;border-bottom:1px solid var(--line);padding:10px}.model-note{color:var(--muted);padding:0 24px 16px;font-size:11px;line-height:1.8}.fallback{text-align:center;position:absolute;inset:0}.fallback svg{width:100%;height:85%}.fallback p{font-size:12px}.scene-loading{color:var(--muted);padding:50px}.page-heading{padding:55px 0 35px}.page-heading h1{font-size:60px}.page-heading p{max-width:670px;color:var(--muted);font-size:15px;line-height:1.9}.skip{z-index:20;color:#111;background:#d1e4ac;padding:14px;position:absolute;top:-80px;left:15px}.skip:focus{top:10px}.lab-layout{grid-template-columns:minmax(0,1fr) 310px;gap:28px;display:grid}.lesson-index{border-top:1px solid var(--line)}.lesson-index button{border:0;border-bottom:1px solid var(--line);text-align:left;width:100%;padding:20px 12px;line-height:1.8;display:block}.lesson-index button small{color:var(--muted);font-size:10px;display:block}.lesson-index button.selected{background:#18221d}.lesson-panel{padding:28px 0}.lesson-panel h2{font-size:24px}.lesson-panel p,.lesson-panel li{color:#b7c0c1;font-size:14px;line-height:1.9}.lesson-panel textarea,.search-input,.note-input{width:100%;color:inherit;background:#111b22;border:1px solid #3b494f;border-radius:3px;padding:14px;line-height:1.8}.lesson-panel textarea{min-height:95px}.pill{color:var(--accent);letter-spacing:1px;font-size:10px}.explanation{grid-template-columns:1.35fr 1fr;gap:65px;padding:50px 0;display:grid}.explanation p,.explanation li{color:#aebbbf;font-size:14px;line-height:1.95}.explanation h3{margin-top:28px;font-size:16px;font-weight:500}.equation{border-left:2px solid var(--accent);color:#e6dec6;background:#141f25;margin:24px 0;padding:24px;font-family:Instrument Serif,serif;font-size:31px}.source-link{color:var(--accent);margin:10px 0;font-size:12px;line-height:1.8;display:block}.feedback{border-left:2px solid var(--accent);background:#1b2922;padding:15px;font-size:13px;line-height:1.8}.quiz-options{flex-direction:column;gap:8px;display:flex}.quiz-options button{text-align:left}.lab-actions{flex-wrap:wrap;gap:10px;margin-top:18px;display:flex}.catalogue{margin-bottom:60px}.environment-row{border-top:1px solid var(--line);grid-template-columns:85px 1fr 1.4fr;gap:30px;padding:35px 0;display:grid}.environment-row .number{color:#758382;font-family:Instrument Serif;font-size:42px}.environment-row p{color:var(--muted);font-size:13px;line-height:1.9}.experiment-list a{border-bottom:1px solid #243039;padding:13px 0;font-size:14px;line-height:1.6;display:block}.experiment-list a span{float:right;color:var(--accent)}.search-input{max-width:650px;margin:0 0 35px}.path-row{border-top:1px solid var(--line);grid-template-columns:1fr 2fr;gap:40px;padding:30px 0;display:grid}.path-row a{color:#c9d9bd;padding:12px 0;font-size:14px;display:block}.notebook-entry{border:1px solid var(--line);margin:20px 0;padding:24px}.notebook-entry p{white-space:pre-wrap;color:var(--muted);line-height:1.9}.error{color:#f1ae94}.source-record{border-top:1px solid var(--line);padding:25px 0}.source-record p{color:var(--muted);max-width:850px;font-size:13px;line-height:1.8}.source-record a{color:var(--accent);font-size:14px}.glossary-grid{grid-template-columns:1fr 1fr;gap:0 50px;margin-bottom:50px;display:grid}.glossary-grid article{border-top:1px solid var(--line);padding:20px 0}.glossary-grid p{color:var(--muted);font-size:13px;line-height:1.9}.plot{background:#0c141b;width:100%;height:390px;display:block}.plot text{fill:#9aadb4;font-family:monospace;font-size:11px}.plot line,.plot path{vector-effect:non-scaling-stroke}.plot-controls{grid-template-columns:repeat(2,1fr);gap:22px;padding:22px;display:grid}.field-charge-controls{border-top:1px solid var(--line);flex-wrap:wrap;gap:10px;padding:20px;font-size:12px;display:flex}.data-summary{color:#d5dfcd;border-top:1px solid var(--line);padding:20px;font-family:monospace;font-size:12px;line-height:1.9}.intro-rule{border-top:1px solid var(--line);color:var(--muted);justify-content:space-between;padding:20px 0;font-size:12px;display:flex}@media (width>=1500px){.scene-wrap{height:500px}}@media (width<=1000px){.wordmark span{display:none}.site-header,nav{gap:20px}.home-intro{grid-template-columns:1.1fr .8fr;column-gap:6%}.lab-layout{grid-template-columns:1fr}.lesson-index{grid-template-columns:repeat(2,1fr);display:grid}.explanation{gap:35px}.below-scene{gap:25px}}@media (width<=650px){.site-header{flex-wrap:wrap;gap:15px;height:auto;min-height:85px;padding:20px 6%}.wordmark{font-size:23px}.language{margin-left:auto}nav{order:3;justify-content:space-between;gap:10px;width:100%;font-size:11px}.site-header button.language{border:0;padding:5px}main{padding:0 6%}.home-intro{padding:35px 0 30px;display:block}.eyebrow{margin-bottom:18px;font-size:9px}h1{letter-spacing:-1px;font-size:57px}.intro-side{margin-top:25px}.intro-side p{max-width:none;margin-bottom:18px;font-size:13px}.scene-wrap{height:360px}.instrument-bar{padding:14px 12px;font-size:8px}.scene-caption{top:18px;left:14px}.scene-scale{font-size:8px;bottom:66px;left:14px;right:15px}.view-controls{bottom:14px;left:12px;right:auto}.telemetry{grid-template-columns:1fr 1fr;gap:20px 0}.telemetry>div{padding:0 14px}.telemetry>div:nth-child(2){border:0}.telemetry strong{font-size:19px}.transport{flex-wrap:wrap;gap:4px;padding:12px 10px}.transport button{padding:8px}.transport .check,.rate{font-size:10px}.below-scene{padding:30px 0 40px;display:block}.below-scene h2{margin:15px 0;font-size:27px}.below-scene>a{margin-top:20px;display:block}footer{flex-wrap:wrap;gap:15px;font-size:10px}footer a{width:100%;margin-left:0}.control-grid{grid-template-columns:1fr;padding:20px}.page-heading{padding:35px 0 25px}.page-heading h1{font-size:46px}.explanation{padding-top:30px;display:block}.explanation>section{margin-bottom:35px}.environment-row{grid-template-columns:35px 1fr;gap:20px;padding:25px 0}.environment-row .number{font-size:28px}.experiment-list{grid-column:2}.environment-row h2{font-size:25px}.path-row,.glossary-grid{display:block}.plot{height:320px}.plot-controls{grid-template-columns:1fr}.lesson-index button{padding:14px 8px;font-size:12px}.equation{font-size:24px;overflow:auto}.plot-controls .slider-label{min-width:0}}@media (prefers-reduced-motion:reduce){*{scroll-behavior:auto!important;transition:none!important}}.note-label{color:#b3bec1;margin-top:20px;font-size:13px;display:block}.note-input{min-height:85px;margin-top:10px;display:block}.search-label{color:var(--muted);font-size:13px;display:block}.search-input{margin-top:12px;display:block}.file-label{flex-wrap:wrap;align-items:center;gap:12px;font-size:13px;display:flex}.file-label input{max-width:250px}.lesson-index{gap:0;margin:0}.lesson-panel label{color:#bdc8ca;font-size:13px}.scene-wrap:after{content:"";pointer-events:none;position:absolute;inset:0;box-shadow:inset 0 0 80px #0b111855}.spectrum{border-top:1px solid var(--line)}.interference-map{border-bottom:1px solid var(--line);margin:0}.interference-map canvas{image-rendering:auto;width:100%;height:auto;display:block}.interference-map figcaption{color:var(--muted);padding:14px 20px;font-size:11px;line-height:1.8}.lesson-panel h3{font-size:14px}button:disabled{opacity:.4;cursor:default}.lesson-index button{min-height:80px}.plot-controls input[type=range]{touch-action:pan-y}.lesson-index{margin-left:0;display:block}.lesson-index button{font-size:13px}.transport button,.view-controls button{min-height:44px}.scene-wrap .view-controls{bottom:12px}@media (width<=1000px){.lesson-index{grid-template-columns:1fr 1fr;display:grid}}@media (width<=650px){.view-controls button{font-size:10px}.scene-scale{bottom:72px}.lesson-index button small{font-size:9px}.lesson-index button{font-size:12px}}.home-speed{border-top:1px solid var(--line);max-width:100%;padding:16px 24px}.home-speed .slider-label{max-width:540px}.phenomena{flex-direction:column;display:flex}.phenomena>.instrument-bar{order:0}.phenomena>.plot,.phenomena>.interference-map{order:1}.phenomena>.transport{order:2}.phenomena>.data-summary{order:3}.phenomena>.plot-controls{order:4}.phenomena>.field-charge-controls{order:5}.phenomena>.model-note{order:6}.data-summary{overflow-wrap:anywhere}.slider-label span{gap:15px;line-height:1.8}.page-heading h1{overflow-wrap:anywhere}.instrument-bar,.telemetry small,.scene-caption span,.scene-scale{font-size:11px}.site-header nav{font-size:14px}.lesson-index button small{font-size:10px}.view-controls button{font-size:11px}@media (width<=650px){.site-header nav{font-size:12px}.instrument-bar,.scene-scale{font-size:9px}.scene-caption span{font-size:10px}.view-controls{gap:3px}.view-controls button{padding:7px;font-size:10px}.fallback p{padding:0 12px;font-size:11px}}.spatial-field{order:1;width:100%;height:390px;position:relative}.spatial-field canvas{display:block}@media (width<=650px){.plot text{font-size:20px}.spatial-field{height:320px}}@media (width>=651px){.home-intro{padding-top:34px;padding-bottom:30px}.home-intro .eyebrow{margin-bottom:18px}.compact .scene-wrap{height:360px}}