:root{color-scheme:dark;font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif;--background:#0a0a0b;--foreground:#f2f2f3;--muted:#a0a0a9;--card:#141416;--line:#26262b;--line-strong:#3c3c43;--accent:#f2f2f3;--accent-contrast:#0a0a0b;--focus:#f2f2f3;--accent-soft:#232326;background:var(--background);color:var(--foreground)}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0}button,a{-webkit-tap-highlight-color:transparent}a{color:inherit}a:focus-visible,button:focus-visible{outline:2px solid var(--focus);outline-offset:3px}.skip-link{position:fixed;top:0;left:1rem;z-index:20;transform:translateY(-150%);padding:.8rem 1rem;background:var(--card)}.skip-link:focus-visible{transform:translateY(0)}.site-header,.site-footer{display:flex;justify-content:space-between;align-items:center;gap:1rem;max-width:1200px;margin:auto;padding:1.25rem 2rem}.site-header{min-height:5rem;border-bottom:1px solid var(--line)}.wordmark{font-size:1.2rem;font-weight:750;letter-spacing:-.06em;text-decoration:none}.wordmark span{color:var(--muted)}.site-header nav{display:flex;gap:1.5rem}.site-header nav a,.site-footer a{font-size:.9rem;text-decoration:none}.site-header nav a:hover,.site-footer a:hover{text-decoration:underline}main{max-width:1200px;margin:auto;padding:0 2rem}.intro{max-width:53rem;padding:6rem 0 5rem}.eyebrow{margin:0 0 1rem;color:var(--muted);font-size:.75rem;font-weight:700;letter-spacing:.1em;text-transform:uppercase}.intro h1{font-size:clamp(3rem,8vw,6.5rem);letter-spacing:-.075em;line-height:1;margin:0 0 2rem}.lede{max-width:45rem;font-size:clamp(1.18rem,2.4vw,1.7rem);line-height:1.55;margin:0}.intro-actions{display:flex;flex-wrap:wrap;gap:.75rem;margin:2rem 0}.btn{display:inline-flex;align-items:center;justify-content:center;min-height:44px;padding:.65rem 1.1rem;border:1px solid var(--line-strong);border-radius:0;font-size:.92rem;font-weight:600;font-family:inherit;text-decoration:none;cursor:pointer}.btn:disabled{opacity:.5;cursor:not-allowed}.btn-primary{background:var(--accent);color:var(--accent-contrast);border-color:var(--accent)}.btn-secondary{background:var(--card);color:var(--foreground)}.btn:hover:not(:disabled){opacity:.88}.disclaimer,.about-note{max-width:45rem;color:var(--muted);line-height:1.6}.simulator-section,.about-section{border-top:1px solid var(--line);padding:4rem 0 5rem;scroll-margin-top:1rem}.section-heading{max-width:49rem}h2{font-size:clamp(1.8rem,4vw,3rem);letter-spacing:-.05em;margin:0 0 1rem}.section-heading>p:last-child{color:var(--muted);line-height:1.7;margin:0}.eeg-sim{margin-top:2.5rem}.eeg-sim-toolbar,.eeg-sim-actions{display:flex;flex-wrap:wrap;gap:.75rem}.eeg-sim-status{margin:1.5rem 0 1rem;color:var(--muted)}.eeg-sim-plots{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:1rem}.card{background:var(--card)}.eeg-sim-plot{min-width:0;padding:1.25rem}.eeg-sim-plot-heading{display:flex;justify-content:space-between;align-items:baseline;flex-wrap:wrap;gap:.5rem;margin-bottom:1rem}.eeg-sim-plot-heading h3{margin:0;font-size:1.1rem}.eeg-sim-plot-heading span,.eeg-sim-axis,.eeg-sim-detail,.eeg-sim-note{color:var(--muted)}.eeg-sim-plot svg{display:block;width:100%;height:auto}.eeg-sim-grid{fill:none;stroke:var(--line-strong);stroke-width:1}.eeg-sim-trace{fill:none;stroke:var(--foreground);stroke-width:2;stroke-linejoin:round}.eeg-sim-axis{display:flex;justify-content:space-between;margin-top:.5rem}.eeg-sim-readings{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:1rem;margin-top:1rem}.eeg-sim-readings>div{min-width:0;padding:1rem;border:1px solid var(--line)}.eeg-sim-readings span,.eeg-sim-readings strong{display:block}.eeg-sim-readings span{color:var(--muted);margin-bottom:.5rem}.eeg-sim-readings strong{overflow-wrap:anywhere}.eeg-sim-detail{margin:1.5rem 0;line-height:1.7}.eeg-sim-note{margin:1.5rem 0 0;line-height:1.6}.about-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:1.5rem;margin:2rem 0}.about-grid>div{border-top:1px solid var(--line-strong);padding-top:1.2rem}.about-grid h3{margin:0 0:.75rem}.about-grid p{color:var(--muted);line-height:1.65;margin:0}.site-footer{border-top:1px solid var(--line);color:var(--muted);font-size:.9rem;padding-block:2rem}@media(max-width:800px){.eeg-sim-plots,.about-grid{grid-template-columns:1fr}.eeg-sim-readings{grid-template-columns:repeat(2,minmax(0,1fr))}}@media(max-width:600px){.site-header,.site-footer{padding-inline:1rem}.site-header nav{gap:.75rem}.site-header nav a{font-size:.75rem}main{padding-inline:1rem}.intro{padding:4rem 0}.simulator-section,.about-section{padding:3rem 0}.eeg-sim-toolbar .btn{flex:1 1 100%}}@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}}