@import url('https://fonts.googleapis.com/css2?family=DM+Sans:wght@400;500;600;700;800&family=Space+Grotesk:wght@400;500;600;700&display=swap');
:root{color-scheme:dark;--bg:#090e18;--ink:#eff5fa;--muted:#91a0af;--soft:#b7c5d0;--line:#25303f;--line2:#1e2a37;--card:#111b29;--card2:#131f2e;--cyan:#67e4da;--amber:#ffbb84;--good:#95e9b4;--danger:#ffad93;--max:1250px}
*{box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:92px}
body{margin:0;background:var(--bg);color:var(--ink);font:16px/1.6 'DM Sans',system-ui,sans-serif;overflow-x:hidden}
button,select,input{font:inherit}button{cursor:pointer}a{color:inherit;text-decoration:none}
a:focus-visible,button:focus-visible,input:focus-visible,select:focus-visible{outline:2px solid var(--cyan);outline-offset:3px}
button:disabled{opacity:.5;cursor:not-allowed}
.skip-link{position:fixed;top:-60px;left:20px;background:var(--cyan);color:#08101b;z-index:50;padding:10px;border-radius:6px}.skip-link:focus{top:15px}
::selection{background:#3daea5;color:#09131a}
.ambient{position:absolute;pointer-events:none;border-radius:50%;filter:blur(100px);z-index:-1;opacity:.24}.ambient-one{width:480px;height:450px;background:#115a68;top:90px;right:-190px}.ambient-two{width:600px;height:350px;background:#383656;top:800px;left:-230px;opacity:.18}
.section-wrap{width:min(calc(100% - 70px),var(--max));margin-inline:auto}
.site-header{height:92px;padding:0 max(35px,calc((100vw - var(--max))/2));display:flex;align-items:center;justify-content:space-between;gap:28px;border-bottom:1px solid #202c3c;background:#090f1bdd;backdrop-filter:blur(16px);position:sticky;top:0;z-index:20}
.brand{display:flex;align-items:center;gap:12px;min-width:225px}.brand-mark{font:bold 17px/1 'Space Grotesk',sans-serif;display:inline-flex;align-items:center;justify-content:center;min-width:44px;height:44px;border:1px solid #355269;border-radius:12px;background:#101e2e;color:var(--cyan);letter-spacing:-1px}.brand-mark span{color:var(--amber);padding:0 1px}.brand-mark.mini{height:31px;min-width:31px;font-size:11px;border-radius:8px;margin-right:8px}.brand-label{font:700 14px/1.1 'Space Grotesk',sans-serif;letter-spacing:.045em;display:flex;flex-direction:column}.brand-label>span{color:var(--cyan);display:inline}.brand-label small{color:var(--muted);font:600 9px/1.6 'DM Sans',sans-serif;letter-spacing:.17em;margin-top:3px}
.site-header nav{display:flex;gap:29px;align-items:center}.site-header nav a,.header-link{font-size:13px;color:#aab8c6;font-weight:700;transition:color .2s}.site-header nav a:hover,.header-link:hover,.footer a:hover{color:var(--cyan)}.header-link{border:1px solid #364657;padding:10px 15px;border-radius:9px;color:#edf3f8;white-space:nowrap}.header-link span{color:var(--cyan);margin-left:9px}
.hero{padding:111px 0 100px;display:grid;grid-template-columns:1.1fr .9fr;gap:55px;align-items:center;min-height:550px}
.eyebrow,.section-index,.card-overline{font-size:10px;letter-spacing:.175em;font-weight:800;color:var(--cyan);display:flex;align-items:center;gap:9px}
.live-dot,.status-dot{width:7px;height:7px;background:var(--cyan);border-radius:50%;box-shadow:0 0 12px #4be4d877;display:inline-block;flex:none}.eyebrow-line{height:1px;width:28px;background:#426070}
h1,h2,h3,h4,p{margin-top:0}h1,h2,h3,h4{font-family:'Space Grotesk',sans-serif;letter-spacing:-.045em}
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.hero-lead{font-size:17px;max-width:600px;color:var(--soft);line-height:1.85}.hero-lead strong{color:#f9fdff;font-weight:700}
.hero-actions{display:flex;align-items:center;gap:29px;margin:33px 0 49px;flex-wrap:wrap}.primary-button{border:1px solid var(--cyan);border-radius:9px;display:inline-flex;justify-content:space-between;gap:30px;align-items:center;background:var(--cyan);color:#082129;font-size:13px;font-weight:800;padding:15px 21px;transition:transform .18s,background .18s}.primary-button:hover{background:#98f6ee;transform:translateY(-2px)}.primary-button span{font-size:20px;line-height:1}.subtle-link{font-size:13px;color:#d9e5eb;font-weight:700;white-space:nowrap}.subtle-link:hover{color:var(--cyan)}
.hero-meta{display:flex;gap:18px;flex-wrap:wrap;color:#9aaab8;font-size:11px;font-weight:700}.meta-glyph{color:var(--cyan);margin-right:5px}
.hero-visual{height:360px;border:1px solid #26394b;border-radius:16px;background:radial-gradient(ellipse at center,#1b3440 0%,#101e2a 44%,#0d1522 100%);position:relative;box-shadow:inset 0 0 80px #08111b,0 30px 100px #060b13aa;overflow:hidden;padding:20px 24px;display:flex;flex-direction:column;justify-content:space-between}
.hero-visual:before{content:"";position:absolute;inset:0;background-image:linear-gradient(#ffffff07 1px,transparent 1px),linear-gradient(90deg,#ffffff07 1px,transparent 1px);background-size:26px 26px;mask-image:linear-gradient(to bottom,transparent,black,transparent)}
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.experiment-grid{display:grid;grid-template-columns:minmax(290px,360px) minmax(0,1fr);gap:18px;align-items:stretch}
.control-panel,.experiment-display{background:#111a28;border:1px solid #2b3a4c;border-radius:15px;padding:27px}
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.control-buttons{display:flex;gap:10px;align-items:stretch}.run-button{flex:1;white-space:nowrap}.reset-button{border:1px solid #3e4f61;background:#1a2837;color:#dce5ef;border-radius:9px;font-size:12px;font-weight:700;padding:10px 15px}.reset-button:hover{background:#263849}.keyboard-hint{font-size:11px;color:#8497a6;line-height:1.7;margin:15px 0 0}
.experiment-display{padding:27px 29px}.display-toolbar{margin-bottom:10px}.display-toolbar span:first-child{display:flex;gap:9px;align-items:center}.readout-intro h3{font-size:27px;line-height:1.3;margin:13px 0 3px}.readout-intro h3 em{color:var(--amber)}.readout-intro p{color:var(--muted);font-size:12px;margin-bottom:21px}.readout-states{display:grid;grid-template-columns:1fr 1fr;gap:12px}.state-card{background:#0b1522;border:1px solid #283b4c;padding:18px 17px 13px;border-radius:12px;min-width:0}.state-card-heading{font-size:10px;font-weight:800;letter-spacing:.09em;color:#eff9fc;display:flex;align-items:center;gap:7px;flex-wrap:wrap}.state-card-heading small{color:#718899;font-size:9px;margin-left:auto}.label-dot{width:8px;height:8px;background:var(--cyan);border-radius:2px;display:inline-block}.code-state .label-dot{background:var(--amber)}.response-track{height:93px;position:relative;display:flex;align-items:center;margin-top:10px}.track-line{height:1px;position:absolute;left:0;right:0;background:linear-gradient(90deg,transparent,#5a7186,transparent)}.zero-marker{position:absolute;left:50%;height:16px;width:1px;background:#526578}.state-orb{height:33px;width:33px;border-radius:50%;position:absolute;left:50%;top:30px;transform:translateX(-50%);transition:left .38s cubic-bezier(.16,.74,.33,1);z-index:2}.orb-true{background:radial-gradient(circle at 32% 32%,#b8fff8,var(--cyan) 45%,#239a97);box-shadow:0 0 25px #59e6d37a}.orb-code{background:radial-gradient(circle at 32% 32%,#ffe7ce,var(--amber) 48%,#c2743b);box-shadow:0 0 25px #ffbb8469}.response-value{display:flex;justify-content:space-between;gap:8px;align-items:center;flex-wrap:wrap}.response-value span{color:#8e9fae;font-size:11px}.response-value strong{font:700 17px 'Space Grotesk';font-variant-numeric:tabular-nums}.true-state .response-value strong{color:var(--cyan)}.code-state .response-value strong{color:var(--amber)}
.difference-bar{margin:14px 0 16px;padding:15px 18px;border:1px solid #2b3f50;border-radius:10px;display:flex;align-items:center;justify-content:space-between;gap:10px}.difference-bar>div{display:flex;align-items:center;gap:15px;flex-wrap:wrap}.difference-bar>div span{color:#91a4b4;font-size:10px;letter-spacing:.1em;font-weight:800}.difference-bar strong{font:700 19px 'Space Grotesk';color:var(--ink);font-variant-numeric:tabular-nums}.difference-pill{padding:7px 11px;background:#18352f;color:#8eeabb;border-radius:20px;font-size:9px;font-weight:800;letter-spacing:.08em}.difference-pill.broken{background:#39271c;color:var(--amber)}
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.lab-message{margin-top:18px;padding:12px 14px;border-left:2px solid var(--cyan);background:#13272c;color:#a3c7c6;font-size:11px;line-height:1.7}.lab-message.warning{border-color:var(--amber);background:#2a241e;color:#f4c8a6}
.instrument-note,.limits{font-size:12px;color:#90a3b2;line-height:1.85;margin:16px 0 0}.instrument-note strong,.limits strong{color:#d1e0e7}
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.validation{display:flex;justify-content:space-between;flex-wrap:wrap;gap:10px;border:1px solid #314251;border-radius:11px;background:#111d2b;padding:17px 24px;margin-top:18px}.validation span{color:#9caebd;font-size:12px}.validation strong{color:var(--cyan);font-family:'Space Grotesk';font-size:18px;margin-right:5px}
.roadmap{display:flex;align-items:stretch;gap:8px}.roadmap article{flex:1;min-width:0;padding:27px;background:#121d2a;border:1px solid #30404f;border-radius:12px}.step-id{font-size:10px;color:var(--cyan);letter-spacing:.15em;font-weight:800}.roadmap-icon{margin:18px 0;color:var(--cyan);font-size:36px;line-height:1}.roadmap h3{font-size:20px;margin:9px 0}.roadmap p{font-size:12px;line-height:1.8;color:#9caebc;margin:0}.roadmap-chevron{display:flex;align-items:center;color:var(--cyan);font-size:26px}.next-question{margin-top:20px;display:flex;justify-content:space-between;align-items:center;gap:18px;padding:28px 34px;border:1px solid #53726b;border-radius:12px;background:linear-gradient(110deg,#15332f,#101e29)}.next-question span{color:var(--cyan);font-size:10px;letter-spacing:.14em;font-weight:800}.next-question h3{margin:7px 0;font-size:22px}.next-question p{margin:0;color:#a1bfb9;font-size:12px;line-height:1.8}.outline-button{border:1px solid #69c5b5;padding:13px 16px;color:#b1f6e9;font-size:12px;border-radius:9px;white-space:nowrap;font-weight:800}.outline-button:hover{background:#294a48}
.footer{margin-top:116px;padding:27px 0 45px;border-top:1px solid #2a3847;display:flex;align-items:center;justify-content:space-between;gap:20px;color:#879aaa;font-size:11px}.footer>span{display:flex;align-items:center}.footer>div{display:flex;gap:20px;flex-wrap:wrap}
@media(max-width:1100px){.site-header nav{gap:16px}.hero{gap:20px}.hero-orbit{height:120px;width:120px}.hero-visual{height:310px}.hero-meta{gap:10px}.experiment-grid{grid-template-columns:310px minmax(0,1fr)}.control-panel,.experiment-display{padding:20px}.state-card{padding:13px}.response-value{font-size:10px}}
@media(max-width:850px){.site-header{padding:0 20px;height:76px}.site-header nav{display:none}.section-wrap{width:min(calc(100% - 38px),var(--max))}.hero{grid-template-columns:1fr;gap:36px;padding:70px 0}.hero-visual{max-width:580px;width:100%;margin:auto}.experiment-grid{grid-template-columns:1fr}.control-panel{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:0 22px}.panel-topline,.control-buttons,.keyboard-hint{grid-column:1/-1}.control-panel .control-group{margin-bottom:23px}.section-heading{align-items:start}.section-heading>.subtle-link{align-self:end}.stat-band{padding:28px 5px}.stat-number{font-size:34px}.principle-grid{grid-template-columns:1fr}.result-cards{gap:10px}.result-card{padding:19px}.roadmap article{padding:20px}}
@media(max-width:570px){.site-header{gap:10px}.header-link{font-size:11px;padding:8px}.brand{min-width:0}.brand-label{font-size:12px}.brand-label small{font-size:8px}.hero{padding:62px 0}.hero h1{font-size:clamp(47px,14vw,72px)}.eyebrow{font-size:9px;flex-wrap:wrap}.hero-visual{height:265px;padding:15px}.hero-orbit{height:103px;width:103px}.hero-world{gap:12px}.hero-equals{font-size:24px}.hero-actions{margin:27px 0 35px}.hero-meta{font-size:10px}.stat-band{display:grid;grid-template-columns:1fr 1fr;gap:23px 12px}.stat-sep{display:none}.stat-number{font-size:36px}.stat-caption{font-size:9px}.experiment-section,.principle-section,.evidence-section,.next-section{padding-top:78px}.section-heading{flex-direction:column;gap:16px}.section-heading h2{font-size:36px}.control-panel{display:block}.readout-intro h3{font-size:22px}.readout-states{grid-template-columns:1fr;gap:10px}.response-track{height:65px}.state-orb{top:17px}.difference-bar>div{gap:7px}.chart-key{gap:8px}.twin-row{gap:5px}.twin-row strong{font-size:17px}.twin-row small{font-size:9px}.twin-arrow{font-size:18px}.result-cards{grid-template-columns:1fr}.result-card{min-height:225px}.result-number{margin:13px 0 5px}.validation{display:grid;grid-template-columns:1fr 1fr}.roadmap{flex-direction:column}.roadmap-chevron{justify-content:center;transform:rotate(90deg)}.next-question{padding:20px;flex-direction:column;align-items:start}.footer{flex-direction:column;align-items:start}.footer>div{gap:12px}.formula-card{padding:21px}.equation,.small-equation{font-size:clamp(18px,5vw,29px)}}
@media(prefers-reduced-motion:reduce){*,*:before,*:after{scroll-behavior:auto!important;animation:none!important;transition:none!important}}


/* Learned v2 comparison: experimental measurements, distinct from v1 browser toy */
.learned-section{padding-top:112px}
.measured-pill{color:#a7efe6;border-color:#356f64;background:#153b37}
.learned-layout{display:grid;grid-template-columns:minmax(0,1.35fr) minmax(300px,.75fr);gap:19px;align-items:stretch}
.learned-chart-panel{padding:31px;background:#111b29;border:1px solid #314455;border-radius:15px}
.learned-controls{display:flex;align-items:center;gap:15px;flex-wrap:wrap}
.learned-controls label{display:flex;flex-direction:column;gap:7px;flex:1;min-width:190px;color:#a7bfca;font-size:10px;letter-spacing:.12em;font-weight:800;text-transform:uppercase}
.learned-controls select{height:47px;background:#091625;border-color:#385062;font-size:13px;letter-spacing:0;font-weight:600}
.learned-chart-key{font-size:12px;color:#96aebc;margin:24px 0 25px}
.learned-chart-key strong{color:var(--cyan)}
.learned-bars{display:flex;flex-direction:column;gap:26px}
.learned-bar-item{min-width:0}
.learned-bar-heading{display:flex;justify-content:space-between;align-items:baseline;gap:10px;margin-bottom:10px}
.learned-bar-heading span{font-size:13px;color:#cfdee6;font-weight:700}
.learned-bar-heading strong{font:700 20px 'Space Grotesk',sans-serif;font-variant-numeric:tabular-nums;letter-spacing:-.04em;color:#e3eff4}
.learned-track{height:12px;border-radius:99px;background:#0a1421;overflow:hidden;border:1px solid #283c4d}
.learned-bar{height:100%;border-radius:99px;transition:width .32s ease}
.learned-bar.focus{background:linear-gradient(90deg,#298f86,#68e6da)}
.learned-bar.regular{background:linear-gradient(90deg,#3b738c,#7cbbd2)}
.learned-bar.alternate{background:linear-gradient(90deg,#715642,#d19d73)}
.learned-chart-bottom{display:flex;align-items:center;justify-content:space-between;gap:12px;flex-wrap:wrap;border-top:1px solid #2b3c4a;margin-top:27px;padding-top:18px;color:#88a0af;font-size:11px}
.learned-chart-bottom a{color:var(--cyan);font-weight:700}
.learned-description{padding:31px 26px;border:1px solid #344b52;border-radius:15px;background:linear-gradient(160deg,#193335,#10212c)}
.learned-description h3{margin:22px 0 16px;font-size:clamp(24px,3vw,35px);line-height:1.25}
.learned-description h3 em{color:var(--amber)}
.learned-description>p{font-size:13px;line-height:1.9;color:#b1c8cc}
.learned-fact{border-top:1px solid #365052;display:flex;gap:17px;align-items:center;padding-top:15px;margin-top:16px}
.learned-fact strong{font:700 27px 'Space Grotesk';color:var(--cyan);white-space:nowrap}
.learned-fact span{font-size:11px;color:#a4c2c2;line-height:1.65}
.learned-caution{border-color:#6a4e40;background:#292321}
.learned-caution .insight-icon{color:var(--amber)}
.learned-caution p{color:#d0b9a5}
.learned-caution strong{color:#ffdfbf}
@media(max-width:850px){.learned-section{padding-top:78px}.learned-layout{grid-template-columns:1fr}.learned-controls label{min-width:160px}}
@media(max-width:570px){.learned-chart-panel,.learned-description{padding:20px}.learned-controls{flex-direction:column;align-items:stretch}.learned-controls label{min-width:0}.learned-bar-heading span{font-size:12px}.learned-chart-bottom{font-size:10px}}