.sp{background:var(--ds-surface);color:var(--ds-ink);font-family:var(--ds-font);-webkit-font-smoothing:antialiased;min-height:100vh;font-size:17px;font-weight:400;line-height:1.45}.sp *,.sp :before,.sp :after{box-sizing:border-box}.sp .wrap{max-width:var(--ds-measure);margin:0 auto;padding:0 32px}.sp .col{max-width:var(--ds-measure-text)}.sp h1,.sp h2,.sp h3{font-family:var(--ds-font);letter-spacing:-.03em;color:var(--ds-ink);margin:0;font-weight:600;line-height:1.05}.sp h1{font-size:clamp(2.5rem,6vw,4.25rem)}.sp h2{font-size:clamp(1.85rem,3.8vw,2.75rem)}.sp h3{font-size:1.2rem;font-weight:600}.sp p{margin:0 0 16px}.sp p:last-child{margin-bottom:0}.sp strong{color:var(--ds-ink);font-weight:600}.sp em{font-family:var(--ds-font-accent);color:var(--ds-ink);font-size:1.08em;font-style:italic}.sp .cite{color:var(--ds-ink-muted);margin-top:4px;font-size:.82rem;line-height:1.45;display:block}.sp .lede{color:var(--ds-ink-muted);font-size:1.2rem;line-height:1.5}.sp section{padding:0 0 64px}.sp .sec-head{margin-bottom:32px}.sp .sec-head h2{margin-bottom:16px}.sp .rule{background:var(--ds-line);border:0;height:1px;margin:0 0 64px}.sp .masthead{align-items:center;gap:16px;padding:32px 0 64px;display:flex}.sp .mark-link{color:var(--ds-ink);border-radius:var(--ds-r-sm);align-items:center;gap:16px;text-decoration:none;display:flex}.sp .mark-link:hover{opacity:.6}.sp .mark-link:focus-visible{outline:2px solid var(--ds-ink);outline-offset:4px}.sp .mark{width:auto;height:24px;display:block}.sp .mark-sub{font-family:var(--ds-font-accent);color:var(--ds-ink);border-left:1px solid var(--ds-border);padding-left:16px;font-size:1.05rem;font-style:italic}.sp .hero{--sp-p:0;isolation:isolate;border-radius:0;align-items:center;width:100vw;min-height:100svh;margin-inline:calc(50% - 50vw);padding:64px 0 32px;display:flex;position:relative;overflow:hidden}.sp .hero .heat{z-index:-2;background:var(--ds-surface);opacity:calc(1 - (var(--sp-p) * .55));position:absolute;inset:0}.sp .hero .heat span{filter:blur(.5px);display:block;position:absolute;inset:-32px}.sp .hero .heat-a{transform:translateY(calc(var(--sp-p) * 32px));background:radial-gradient(120% 70% at 50% 108%,#ffa64c8c 0%,#ffa64c2e 42%,#fff0 72%),radial-gradient(90% 55% at 12% 100%,#ffa64c52 0%,#fff0 70%);animation:9s ease-in-out infinite alternate sp-heat}.sp .hero .heat-b{transform:translateY(calc(var(--sp-p) * -16px));background:radial-gradient(80% 60% at 88% 96%,#62116438 0%,#fff0 68%),radial-gradient(70% 50% at 24% 12%,#2563eb1a 0%,#fff0 70%);animation:13s ease-in-out infinite alternate sp-heat-b}.sp .hero .heat-grain{opacity:.5;background:repeating-linear-gradient(#14141409 0 1px,#fff0 1px 4px);-webkit-mask-image:linear-gradient(#0000 40%,#000 100%);mask-image:linear-gradient(#0000 40%,#000 100%)}@keyframes sp-heat{0%{transform:translateY(16px)scale(1)}to{transform:translateY(-16px)scale(1.06)}}@keyframes sp-heat-b{0%{transform:translate(-8px,8px)scale(1.04)}to{transform:translate(8px,-8px)scale(1)}}.sp .lead-curve{opacity:0;width:100%;height:96px;margin-bottom:32px;transition:opacity .9s;display:block}.sp .lead-curve path{stroke-dasharray:460;stroke-dashoffset:460px}.sp #curve.is-near .lead-curve{opacity:1}.sp #curve.is-near .lead-curve path{animation:sp-draw 1.6s var(--ds-ease) forwards}.sp .hero-inner{width:100%;max-width:var(--ds-measure);transform:translateY(calc(var(--sp-p) * -16px));margin:0 auto;padding:0 32px;position:relative}.sp .hero-eyebrow{font-family:var(--ds-font-mono);letter-spacing:.12em;text-transform:uppercase;color:var(--ds-ink-muted);animation:sp-rise .7s var(--ds-ease) both;align-items:center;gap:8px;margin:0 0 16px;font-size:.72rem;animation-delay:2.5s;display:flex}.sp .hero-eyebrow .dot{border-radius:var(--ds-r-xs);background:var(--ds-chart-accent);width:8px;height:8px;animation:2.4s ease-in-out infinite sp-pulse}@keyframes sp-pulse{0%,to{opacity:1;transform:scale(1)}50%{opacity:.45;transform:scale(.8)}}.sp .hero-title{max-width:18ch;margin:0 0 32px}.sp .hero-title .l{animation:sp-rise .9s var(--ds-ease) both;display:block;position:relative}.sp .hero-title .l:first-child{animation-delay:1.9s}.sp .hero-title .l:nth-child(2){animation-delay:2.05s}.sp .hero-title .l:nth-child(3){animation-delay:2.2s}.sp .hero-title{margin-bottom:16px}@keyframes sp-rise{0%{opacity:0;transform:translateY(16px)}to{opacity:1;transform:translateY(0)}}.sp .hero .lede{max-width:46ch;animation:sp-rise .9s var(--ds-ease) 2.7s both;margin-bottom:32px}.sp .hero-actions{animation:sp-rise .9s var(--ds-ease) 2.9s both;flex-wrap:wrap;align-items:center;gap:16px;display:flex}.sp .hero-actions .cta-note{margin-top:0}.sp .scroll-cue{font-family:var(--ds-font-mono);letter-spacing:.12em;text-transform:uppercase;color:var(--ds-ink-muted);opacity:calc(1 - var(--sp-p));animation:sp-rise .9s var(--ds-ease) 3.1s both;align-items:center;gap:8px;margin-top:32px;font-size:.7rem;text-decoration:none;display:inline-flex}.sp .scroll-cue:hover{color:var(--ds-ink)}.sp .scroll-cue:focus-visible{outline:2px solid var(--ds-ink);outline-offset:4px;border-radius:var(--ds-r-xs)}.sp .scroll-cue-line{background:var(--ds-line-strong);transform-origin:0;width:32px;height:1px;animation:2.2s ease-in-out infinite sp-cue}@keyframes sp-cue{0%,to{opacity:.5;transform:scaleX(.4)}50%{opacity:1;transform:scaleX(1)}}.sp .hero-figure{background:var(--ds-surface-blue);border-radius:var(--ds-r-lg);margin:64px 0 0;padding:32px}.sp .hero-figure svg{width:100%;height:auto;display:block}.sp .axis-row{color:var(--ds-ink-muted);justify-content:space-between;margin-top:16px;font-size:.82rem;display:flex}.sp .cta{background:var(--ds-ink);color:var(--ds-ink-inverse);font-family:var(--ds-font);border:1px solid var(--ds-ink);border-radius:var(--ds-r-pill);cursor:pointer;padding:16px 32px;font-size:1rem;font-weight:600;text-decoration:none;transition:opacity .18s,background .18s,color .18s;display:inline-block}.sp .cta:hover{opacity:.82}.sp .cta:focus-visible{outline:2px solid var(--ds-ink);outline-offset:4px}.sp .cta-secondary{background:var(--ds-surface);color:var(--ds-ink);border:1px solid var(--ds-border)}.sp .cta-secondary:hover{background:var(--ds-surface-warm);opacity:1}.sp .cta-note{color:var(--ds-ink-muted);margin-top:16px;font-size:.9rem}.sp .cta-note span{color:var(--ds-ink);font-family:var(--ds-font-accent);font-size:1.08em;font-style:italic}.sp .patterns{grid-template-columns:repeat(4,1fr);gap:16px;margin-top:32px;display:grid}.sp .pattern{background:var(--ds-surface-warm);border-radius:var(--ds-r-lg);padding:32px 16px}.sp .pattern h3{margin-bottom:16px;font-size:1.05rem}.sp .pattern svg{width:100%;height:auto;margin-bottom:16px;display:block}.sp .pattern .what{color:var(--ds-ink);margin-bottom:8px;font-size:.95rem;line-height:1.45}.sp .pattern .report{color:var(--ds-ink-muted);font-size:.92rem;line-height:1.45}.sp .patterns-note{color:var(--ds-ink-muted);max-width:58ch;margin-top:32px;font-size:.95rem}.sp .lab-eyebrow,.sp .lab-rules-title{font-family:var(--ds-font-mono);letter-spacing:.12em;text-transform:uppercase;color:var(--ds-ink-muted);margin-bottom:8px;font-size:.68rem;display:block}.sp .lab-lede{color:var(--ds-ink-muted);max-width:34em;font-size:1rem}.sp .lab-spec{grid-template-columns:repeat(4,minmax(0,1fr));gap:16px;margin-top:32px;display:grid}.sp .lab-spec-item{border:1px solid var(--ds-line);border-radius:var(--ds-r-sm);background:var(--ds-surface);padding:16px;display:block}.sp .lab-spec-item .lab-key{font-family:var(--ds-font-mono);letter-spacing:.1em;text-transform:uppercase;color:var(--ds-ink-muted);margin-bottom:8px;font-size:.62rem;display:block}.sp .lab-spec-item .lab-val{font-size:1rem;font-weight:600;line-height:1.1;display:block}.sp .lab-spec-item .lab-sub{color:var(--ds-ink-muted);margin-top:4px;font-size:.85rem;display:block}.sp .rules{border-top:1px solid var(--ds-line);margin-top:32px;padding-top:16px}.sp .rule-item{border-bottom:1px solid var(--ds-line);grid-template-columns:1fr 2.1fr;gap:32px;padding:32px 0;display:grid}.sp .rule-head{align-items:baseline;gap:8px;display:flex}.sp .rule-id{font-family:var(--ds-font-mono);letter-spacing:.08em;color:var(--ds-ink-muted);border:1px solid var(--ds-line);border-radius:var(--ds-r-xs);padding:4px;font-size:.68rem;line-height:1}.sp .rule-item h3{font-size:1.1rem}.sp .rule-item p{color:var(--ds-ink-muted);font-size:1rem}.sp .cal{border-top:1px solid var(--ds-line);margin-top:32px}.sp .cal-head,.sp .cal-week{grid-template-columns:150px minmax(0,1fr) 220px;align-items:start;gap:16px;display:grid}.sp .cal-head{padding:16px 0 8px}.sp .cal-dows{grid-template-columns:repeat(7,minmax(0,1fr));gap:4px;display:grid}.sp .cal-dow{font-family:var(--ds-font-mono);letter-spacing:.08em;text-transform:uppercase;color:var(--ds-ink-muted);padding-left:8px;font-size:.68rem}.sp .cal-week{border-bottom:1px solid var(--ds-line);padding:16px 0}.sp .cal-label .cal-wk{font-size:1.05rem;font-weight:600;line-height:1.1;display:block}.sp .cal-label .cal-phase{font-family:var(--ds-font-mono);letter-spacing:.08em;text-transform:uppercase;color:var(--ds-ink-muted);margin-top:4px;font-size:.7rem;display:block}.sp .cal-label p{color:var(--ds-ink-muted);margin:8px 0 0;font-size:.9rem}.sp .cal-days{grid-template-columns:repeat(7,minmax(0,1fr));gap:4px;display:grid}.sp .cal-day{border:1px solid var(--ds-line);border-radius:var(--ds-r-sm);background:var(--ds-surface);min-height:88px;padding:8px;position:relative}.sp .cal-day.is-session{background:var(--ds-surface-blue);border-color:#0000}.sp .cal-day.is-rest{background:var(--ds-surface-warm);border-color:#0000}.sp .cal-date{font-family:var(--ds-font-mono);color:var(--ds-ink-muted);font-size:.7rem}.sp .cal-tag{color:var(--ds-ink);margin-top:8px;font-size:.72rem;font-weight:500;display:block}.sp .cal-tag.rest{color:var(--ds-ink-muted)}.sp .cal-out{padding-top:4px}.sp .cal-out p{color:var(--ds-ink-muted);margin:0;font-size:.9rem}.sp .cal-out .cal-read{color:var(--ds-ink);margin-top:8px}.sp .dots{gap:4px;margin-top:8px;display:flex}.sp .dot{border-radius:var(--ds-r-xs);background:var(--ds-chart-accent);width:8px;height:8px}.sp .dot.resp{background:var(--ds-chart-primary)}.sp .tl-key{color:var(--ds-ink-muted);flex-wrap:wrap;gap:32px;margin-top:32px;font-size:.9rem;display:flex}.sp .tl-key span{align-items:center;gap:8px;display:flex}.sp .tl-key i{border-radius:var(--ds-r-xs);width:8px;height:8px;display:block}.sp .reading{border-top:1px solid var(--ds-line);padding:32px 0}.sp .reading h3{margin-bottom:16px}.sp .reading .col{max-width:62ch}.sp .reading-fig{background:var(--ds-surface-warm);border-radius:var(--ds-r-lg);max-width:560px;margin:32px 0 0;padding:32px}.sp .reading-fig svg{width:100%;height:auto;display:block}.sp .reading-lead{grid-template-columns:minmax(0,1fr) minmax(0,1fr);align-items:center;gap:32px;display:grid}.sp .reading-lead .reading-fig{max-width:none;margin:0}.sp .reading-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:16px;margin-top:32px;display:grid}.sp .reading-card{border:1px solid var(--ds-line);border-radius:var(--ds-r-lg);background:var(--ds-surface);padding:32px}.sp .reading-card h3{margin-bottom:16px}.sp .reading-card .reading-fig{max-width:none;margin:0 0 16px;padding:16px}@media (max-width:860px){.sp .reading-lead,.sp .reading-grid{grid-template-columns:minmax(0,1fr)}.sp .reading-lead .reading-fig{margin-top:32px}}.sp .offer{grid-template-columns:1.25fr 1fr;align-items:start;gap:16px;margin-top:32px;display:grid}.sp .plan{border:1px solid var(--ds-border);border-radius:var(--ds-r-lg);background:var(--ds-surface);padding:32px}.sp .plan-main{border:1px solid var(--ds-selected);background:var(--ds-surface-blue)}.sp .price{font-family:var(--ds-font-accent);color:var(--ds-ink);margin-bottom:8px;font-size:3.25rem;font-style:italic;font-weight:400;line-height:1.05}.sp .plan h3{margin-bottom:16px;font-size:1.05rem}.sp .plan p{color:var(--ds-ink-muted);margin-bottom:32px;font-size:.95rem}.sp .plan .cta{text-align:center;width:100%}.sp .plan-alt .cta{background:var(--ds-surface);color:var(--ds-ink);border:1px solid var(--ds-border)}.sp .plan-alt .cta:hover{background:var(--ds-surface-warm);opacity:1}.sp .offer-note{max-width:60ch;color:var(--ds-ink-muted);margin-top:32px;font-size:.97rem}.sp .safety{background:var(--ds-surface-warm);border-radius:var(--ds-r-lg);max-width:62ch;padding:32px}.sp .safety h2{margin-bottom:16px;font-size:1.6rem}.sp .safety p{color:var(--ds-ink-muted);font-size:1rem}.sp details{background:var(--ds-surface);border:1px solid var(--ds-border);border-radius:var(--ds-r-md);padding:32px}.sp summary{cursor:pointer;color:var(--ds-ink);justify-content:space-between;align-items:center;gap:16px;font-size:1rem;font-weight:600;list-style:none;display:flex}.sp summary::-webkit-details-marker{display:none}.sp summary:focus-visible{outline:2px solid var(--ds-ink);outline-offset:4px}.sp .chev{color:var(--ds-ink-muted);font-size:1.3rem;line-height:1.1;transition:transform .2s}.sp details[open] .chev{transform:rotate(45deg)}.sp details p{color:var(--ds-ink-muted);max-width:70ch;margin-top:16px;font-size:.95rem}.sp footer{border-top:1px solid var(--ds-line);color:var(--ds-ink-muted);padding:32px 0 64px;font-size:.88rem}.sp .draw{stroke-dasharray:460;stroke-dashoffset:460px;animation:sp-draw 1.9s var(--ds-ease) .25s forwards}@keyframes sp-draw{to{stroke-dashoffset:0}}.sp .fade-marks{opacity:0;animation:.7s 1.85s forwards sp-fade}@keyframes sp-fade{to{opacity:1}}html{scroll-behavior:smooth;scroll-padding-top:32px}.sp{--sp-progress:0}.sp .sp-progress{z-index:50;pointer-events:none;background:0 0;height:4px;position:fixed;top:0;left:0;right:0}.sp .sp-progress span{width:100%;height:100%;transform:scaleX(var(--sp-progress));transform-origin:0;background:var(--ds-chart-accent);border-radius:0 var(--ds-r-xs) var(--ds-r-xs) 0;display:block}.sp .rv{opacity:0;transition:opacity .7s var(--ds-ease) var(--rv-d,0s), transform .7s var(--ds-ease) var(--rv-d,0s);will-change:opacity, transform;transform:translateY(16px)}.sp .rv.is-in{opacity:1;transform:none}.sp .rv .eli-chart path{transition:opacity .6s .2s}.sp .pattern,.sp .plan,.sp .lab-spec-item,.sp .reading-fig,.sp .safety,.sp details{transition:transform .28s var(--ds-ease), box-shadow .28s var(--ds-ease), border-color .28s ease}.sp .pattern:hover,.sp .lab-spec-item:hover,.sp .plan:hover{box-shadow:var(--ds-shadow);transform:translateY(-4px)}.sp .pattern:hover .eli-chart,.sp .reading-fig:hover .eli-chart{transform:scale(1.02)}.sp .eli-chart{transition:transform .35s var(--ds-ease)}.sp .cta{transition:transform .2s var(--ds-ease), opacity .18s ease, box-shadow .2s ease}.sp .cta:hover{box-shadow:var(--ds-shadow);transform:translateY(-2px)}.sp .cta:active{box-shadow:none;transform:translateY(0)}.sp .cal-day{transition:transform .22s,box-shadow .22s,background .22s}.sp .cal-day.is-session:hover,.sp .cal-day.is-rest:hover{box-shadow:var(--ds-shadow);transform:translateY(-2px)}.sp .rule-item{border-radius:var(--ds-r-sm);transition:background .24s}.sp .rule-item:hover{background:var(--ds-surface-warm)}.sp .mark-link{transition:opacity .2s,transform .2s}.sp .mark-link:hover{transform:translateY(-1px)}.sp details summary .chev{transition:transform .25s var(--ds-ease)}.sp details:hover{border-color:var(--ds-line-strong)}.sp details[open] p{animation:sp-rise .45s var(--ds-ease) both}@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}.sp .draw{stroke-dashoffset:0;animation:none}.sp .fade-marks{opacity:1;animation:none}.sp .cta{transition:none}.sp .rv{opacity:1;transition:none;transform:none}.sp .pattern:hover,.sp .lab-spec-item:hover,.sp .plan:hover,.sp .cal-day:hover,.sp .cta:hover,.sp .mark-link:hover{transform:none}.sp .eli-chart{transition:none}.sp details[open] p,.sp .hero .heat-a,.sp .hero .heat-b,.sp .hero-eyebrow .dot,.sp .scroll-cue-line{animation:none}.sp .hero-eyebrow,.sp .hero-title .l,.sp .hero .lede,.sp .hero-actions,.sp .scroll-cue{opacity:1;animation:none;transform:none}}@media (max-width:900px){.sp .patterns{grid-template-columns:repeat(2,1fr)}.sp .cal-head,.sp .cal-week{grid-template-columns:1fr;gap:8px}.sp .cal-head{display:none}.sp .cal-week{padding:16px 0 32px}.sp .cal-day{min-height:72px}.sp .cal-out{padding-top:8px}.sp .offer{grid-template-columns:1fr}.sp .rule-item{grid-template-columns:1fr;gap:8px}.sp .lab-spec{grid-template-columns:repeat(2,minmax(0,1fr))}}@media (max-width:620px){.sp{font-size:16px}.sp .wrap{padding:0 16px}.sp section{padding:0 0 64px}.sp .rule{margin-bottom:32px}.sp .patterns{grid-template-columns:1fr}.sp .masthead{flex-wrap:wrap;gap:8px;padding:32px 0 16px}.sp .mark-sub{border-left:0;padding-left:0}.sp .hero{min-height:calc(100svh - 96px);padding:32px 0}.sp .hero-inner{padding:0 16px}.sp .hero-title{max-width:100%}.sp .hero .lede{font-size:1.05rem}.sp .hero-actions{gap:8px}.sp .hero-actions .cta{text-align:center;width:100%}.sp .lead-curve{height:64px}.sp .hero-figure,.sp .reading-fig,.sp .safety,.sp details,.sp .plan{padding:16px}.sp .lab-spec{grid-template-columns:1fr;gap:8px}}.sp .eli-chart{width:100%;height:auto;display:block;overflow:visible}@media (max-width:620px){.sp .cal-day{min-height:60px;padding:4px}.sp .cal-tag{margin-top:4px;font-size:.62rem}.sp .cal-date{font-size:.6rem}.sp .cal-days{gap:4px}.sp .cal-day .dots{flex-wrap:wrap;gap:4px;margin-top:4px}}.sp section{padding:0 0 96px;scroll-margin-top:64px}.sp .sec-head{max-width:720px}.sp .sec-head h2{text-wrap:balance}.sp .sec-head>p{color:var(--ds-ink-muted);font-size:1.05rem}.sp .rule{margin:0 0 64px}.sp .patterns{gap:16px}.sp .pattern{flex-direction:column;display:flex}.sp .pattern .report{margin-top:auto}.sp .reading-fig{width:100%}.sp a:focus-visible,.sp summary:focus-visible{outline:2px solid var(--ds-chart-accent);outline-offset:4px}.sp .pattern-viz{margin-bottom:16px}.sp .curve-legend{flex-wrap:wrap;gap:4px 16px;margin:8px 0 0;padding:0;list-style:none;display:flex}.sp .curve-legend li{font-family:var(--ds-font-mono);letter-spacing:.06em;text-transform:uppercase;color:var(--ds-ink-muted);align-items:center;gap:8px;font-size:.66rem;display:flex}.sp .curve-legend .key{border-top:2px solid var(--ds-chart-line);width:16px;height:0}.sp .curve-legend .key-ref{border-top:2px dashed var(--ds-chart-ref)}.sp .sticky-cta{z-index:40;background:var(--ds-surface);border-top:1px solid var(--ds-border);box-shadow:var(--ds-shadow);opacity:0;pointer-events:none;transition:transform .4s var(--ds-ease), opacity .4s ease;position:fixed;bottom:0;left:0;right:0;transform:translateY(100%)}.sp .sticky-cta.is-in{opacity:1;pointer-events:auto;transform:translateY(0)}.sp .sticky-cta-inner{max-width:var(--ds-measure);justify-content:space-between;align-items:center;gap:16px;margin:0 auto;padding:16px 32px;display:flex}.sp .sticky-cta-note{font-family:var(--ds-font-mono);letter-spacing:.08em;text-transform:uppercase;color:var(--ds-ink-muted);margin:0;font-size:.7rem}.sp .sticky-cta-note span{color:var(--ds-ink)}.sp .sticky-cta .cta{padding:8px 32px}@media (max-width:640px){.sp .sticky-cta-inner{gap:8px;padding:8px 16px}.sp .sticky-cta-note{display:none}.sp .sticky-cta .cta{text-align:center;width:100%;padding:16px 32px}}@media (prefers-reduced-motion:reduce){.sp .sticky-cta{transition:none}.sp .lead-curve{opacity:1}.sp .lead-curve path{stroke-dashoffset:0;animation:none}}.sp section.band{padding:64px 0;position:relative}.sp section.band:before{content:"";z-index:-1;width:100vw;margin-inline:calc(50% - 50vw);position:absolute;inset:0}.sp section.band-warm:before{background:var(--ds-surface-warm)}.sp section.band-plain:before{background:var(--ds-surface)}.sp section.band-blue:before{background:var(--ds-surface-blue)}.sp section.band-plain+.band-plain:before,.sp section.band-warm+.band-warm:before{border-top:1px solid var(--ds-line)}@media (max-width:640px){.sp section.band{padding:64px 0}}.sp .masthead{justify-content:space-between}.sp .mast-cta{border:1px solid var(--ds-border);border-radius:var(--ds-r-sm);background:var(--ds-surface);color:var(--ds-ink);align-items:center;gap:8px;padding:8px 16px;font-size:.9rem;text-decoration:none;transition:background .2s,border-color .2s,transform .2s;display:inline-flex}.sp .mast-cta:hover{background:var(--ds-surface-warm);border-color:var(--ds-line-strong);transform:translateY(-1px)}.sp .mast-cta span{transition:transform .2s}.sp .mast-cta:hover span{transform:translate(4px)}.sp .curve-legend .key-delta{border-radius:var(--ds-r-xs);background:var(--ds-chart-accent);opacity:.4;border:0;width:16px;height:8px}.sp .curve-legend .key-ramp{border-top:2px solid var(--ds-chart-line);opacity:.7;width:16px;height:0}.sp.has-sticky footer{padding-bottom:64px}@media (max-width:640px){.sp.has-sticky footer{padding-bottom:64px}}.sp section.band{padding:64px 0}.sp section.band-appendix{padding:32px 0}.sp section.band-warm{--ch-bg:var(--ds-surface-warm)}.sp section.band-plain{--ch-bg:var(--ds-surface)}.sp section.band-blue{--ch-bg:var(--ds-surface-blue)}.sp section.ch-1{--ch-bg:var(--ds-surface-warm)}.sp section.ch-2{--ch-bg:var(--ds-surface)}.sp section.ch-3{--ch-bg:var(--ds-surface-blue)}.sp section.ch-4{--ch-bg:var(--ds-surface-amber)}.sp section.ch-5{--ch-bg:var(--ds-surface-violet)}.sp section.band:before{background:var(--ch-bg)}.sp section.band+section.band:before{border-top:1px solid var(--ds-line)}.sp .chapter{z-index:20;background:var(--ch-bg);margin-top:-16px;margin-bottom:32px;position:sticky;top:0}.sp .chapter-bar{font-family:var(--ds-font-mono);letter-spacing:.12em;text-transform:uppercase;color:var(--ds-ink-muted);align-items:center;gap:16px;padding:16px 0;font-size:.68rem;display:flex}.sp .chapter-n{color:var(--ds-ink)}.sp .chapter-rule{background:var(--ds-line);flex:1;height:1px}.sp .chapter-intro{z-index:40;text-align:center;background:var(--ch-bg);opacity:0;visibility:hidden;pointer-events:none;flex-direction:column;justify-content:center;align-items:center;gap:16px;padding:32px;display:flex;position:fixed;inset:0}.sp .ci-eyebrow{font-family:var(--ds-font-mono);letter-spacing:.32em;text-transform:uppercase;color:var(--ds-ink);font-size:.68rem}.sp .ci-title{max-width:22ch;font-family:var(--ds-font);letter-spacing:-.03em;color:var(--ds-ink);font-size:clamp(1.85rem,3.8vw,2.75rem);font-weight:600;line-height:1.05}.sp .chapter.is-open .chapter-intro{animation:sp-ci-stage 2s var(--ds-ease-out) both}.sp .chapter.is-open .ci-eyebrow{animation:sp-ci-eyebrow 2s var(--ds-ease-out) both}.sp .chapter.is-open .ci-title{animation:sp-ci-title 2s var(--ds-ease-out) both}.sp .chapter.is-open .chapter-bar{animation:.4s 1.6s both sp-ch-bar}@keyframes sp-ci-stage{0%{opacity:0;visibility:visible}6%{opacity:1;visibility:visible}80%{opacity:1;visibility:visible}to{opacity:0;visibility:hidden}}@keyframes sp-ci-eyebrow{0%{opacity:0;letter-spacing:.48em;transform:scale(1.9)}10%{opacity:1}28%{transform:scale(1.9)}46%{opacity:1;letter-spacing:.32em;transform:scale(1)}to{opacity:1;letter-spacing:.32em;transform:scale(1)}}@keyframes sp-ci-title{0%,30%{opacity:0;transform:translateY(16px)}55%{opacity:1;transform:translateY(0)}to{opacity:1;transform:translateY(0)}}@keyframes sp-ch-bar{0%{opacity:0}to{opacity:1}}.sp .chapter-rail{z-index:30;opacity:0;pointer-events:none;transition:opacity .3s;position:fixed;top:50%;left:32px;transform:translateY(-50%)}.sp.has-sticky .chapter-rail{opacity:1;pointer-events:auto}.sp .chapter-rail ol{gap:32px;margin:0;padding:0 0 0 16px;list-style:none;display:grid;position:relative}.sp .chapter-rail ol:before,.sp .chapter-rail ol:after{content:"";background:var(--ds-line-strong);opacity:.35;width:1px;position:absolute;top:4px;bottom:4px;left:4px}.sp .chapter-rail ol:after{height:var(--rail-fill,0%);background:var(--ds-ink);opacity:1;transition:height .4s var(--ds-ease-out);bottom:auto}.sp .chapter-rail li{position:relative}.sp .chapter-rail a{color:var(--ds-ink-muted);font-family:var(--ds-font-mono);letter-spacing:.1em;text-transform:uppercase;align-items:center;gap:8px;font-size:.62rem;text-decoration:none;display:flex}.sp .chapter-rail .rail-dot{border-radius:var(--ds-r-xs);background:var(--ds-surface);width:8px;height:8px;box-shadow:0 0 0 1px var(--ds-line-strong);margin-top:-4px;transition:background .2s,transform .2s,box-shadow .2s;position:absolute;top:50%;left:-16px}.sp .chapter-rail .rail-label{opacity:0;transition:opacity .2s,transform .2s;transform:translate(-4px)}.sp .chapter-rail a:hover .rail-label,.sp .chapter-rail a:focus-visible .rail-label,.sp .chapter-rail li.is-active .rail-label{opacity:1;transform:translate(0)}.sp .chapter-rail li.is-done .rail-dot{background:var(--ds-ink);box-shadow:0 0 0 1px var(--ds-ink)}.sp .chapter-rail li.is-active .rail-dot{background:var(--ds-chart-accent);box-shadow:0 0 0 1px var(--ds-chart-accent);transform:scale(1.4)}.sp .chapter-rail li.is-active a{color:var(--ds-ink)}@media (max-width:1280px){.sp .chapter-rail{display:none}}@media (max-width:640px){.sp .chapter{margin-bottom:16px}.sp .chapter-bar{padding:8px 0;font-size:.62rem}.sp .ci-title{font-size:1.6rem}.sp .ci-eyebrow{letter-spacing:.24em;font-size:.62rem}.sp section.band{padding:64px 0}}@media (prefers-reduced-motion:reduce){.sp .chapter-rail,.sp .chapter-rail *{transition:none}.sp .chapter.is-open .chapter-intro,.sp .chapter.is-open .ci-eyebrow,.sp .chapter.is-open .ci-title{animation:none}.sp .chapter-intro{display:none}.sp .chapter.is-open .chapter-bar{animation:none}}.sp .lab-fig{background:var(--ds-surface-warm);border:1px solid var(--ds-border);border-radius:var(--ds-r-md);margin:32px 0;padding:32px}.sp .lab-fig .eli-chart{width:100%;height:auto;display:block}.sp .lab-readout{flex-wrap:wrap;align-items:baseline;gap:16px;margin-top:16px;display:flex}.sp .lab-readout-v{font-family:var(--ds-font-mono);color:var(--ds-ink);font-variant-numeric:tabular-nums;margin:0;font-size:1.6rem;font-weight:500}.sp .lab-readout-t{color:var(--ds-ink-muted);margin:0;font-size:.9rem}.sp .lab-controls{grid-template-columns:1fr 1fr;gap:32px;margin-top:16px;display:grid}.sp .lab-controls label{gap:8px;display:grid}.sp .lab-controls span{font-family:var(--ds-font-mono);letter-spacing:.1em;text-transform:uppercase;color:var(--ds-ink-muted);font-size:.66rem}.sp .lab-controls b{color:var(--ds-ink);font-weight:500}.sp .lab-controls input[type=range]{appearance:none;border-radius:var(--ds-r-xs);background:var(--ds-border);outline:none;width:100%;height:4px}.sp .lab-controls input[type=range]::-webkit-slider-thumb{appearance:none;border-radius:var(--ds-r-sm);background:var(--ds-chart-accent);border:1px solid var(--ds-ink);cursor:pointer;width:16px;height:16px}.sp .lab-controls input[type=range]::-moz-range-thumb{border-radius:var(--ds-r-sm);background:var(--ds-chart-accent);border:1px solid var(--ds-ink);cursor:pointer;width:16px;height:16px}.sp .lab-controls input[type=range]:focus-visible{outline:2px solid var(--ds-ink);outline-offset:4px}.sp .lab-fig figcaption{color:var(--ds-ink-muted);margin-top:16px;font-size:.82rem;line-height:1.45}@media (max-width:640px){.sp .lab-fig{padding:16px}.sp .lab-controls{grid-template-columns:1fr;gap:16px}}.sp{overflow-x:clip}html:has(.sp){background:var(--ds-surface);--lightningcss-light:initial;--lightningcss-dark: ;color-scheme:light}