:root{--color-paper: oklch(97% .012 95);--color-paper-2: oklch(94% .016 95);--color-paper-3: oklch(91% .02 95);--color-ink: oklch(20% .012 250);--color-muted: oklch(43% .018 250);--color-rule: oklch(80% .025 95);--color-accent: oklch(86% .18 95);--color-accent-deep: oklch(67% .16 95);--color-accent-ink: oklch(20% .012 250);--color-accent-shadow: oklch(76% .2 95 / .45);--color-cyan: oklch(80% .1 235);--color-cyan-deep: oklch(48% .13 235);--color-coral: oklch(72% .17 25);--color-coral-soft: oklch(91% .05 25);--color-mint: oklch(84% .09 150);--color-focus: oklch(42% .15 260);--color-error: oklch(52% .2 25);--color-white: oklch(99% .006 95);--color-shadow: oklch(20% .012 250 / .16);--font-body: "Plus Jakarta Sans", "Arial Rounded MT Bold", system-ui, sans-serif;--font-display: "Plus Jakarta Sans", "Arial Rounded MT Bold", system-ui, sans-serif;--font-mono: "JetBrains Mono", ui-monospace, monospace;--space-xs: .25rem;--space-sm: .5rem;--space-md: 1rem;--space-lg: 1.5rem;--space-xl: 2rem;--space-2xl: 3rem;--space-3xl: 4rem;--text-display: clamp(3rem, 8.8vw, 7.2rem);--text-section: clamp(2.5rem, 5vw, 5rem);--radius-card: 20px;--radius-input: 12px;--radius-pill: 999px;--rule-thin: 1px;--dur-short: .14s;--dur-medium: .16s;--ease-out: cubic-bezier(.16, 1, .3, 1);--ease-in: cubic-bezier(.7, 0, .84, 0);--ease-in-out: cubic-bezier(.65, 0, .35, 1);--ease-snap: cubic-bezier(.22, 1, .36, 1);--ease-press: cubic-bezier(.2, .7, .3, 1);--shell: 78rem;--page-gutter: clamp(1rem, 4vw, 3rem);--section-gap: clamp(4.5rem, 9vw, 8rem)}*{box-sizing:border-box}html,body{margin:0;overflow-x:clip}body{background:var(--color-paper);color:var(--color-ink);font-family:var(--font-body);line-height:1.6}a{color:inherit}button{font:inherit}:focus-visible{outline:3px solid var(--color-focus);outline-offset:3px}.shell{width:100%;max-width:var(--shell);margin-inline:auto;padding-inline:var(--page-gutter)}.site-nav{min-height:76px;display:flex;align-items:center;justify-content:space-between;gap:var(--space-md);border-bottom:1px solid var(--color-rule)}.site-nav nav{display:none;gap:var(--space-xl);font-size:.84rem;font-weight:600}.nav-cta,.button{white-space:nowrap}.nav-cta{font-size:.82rem;font-weight:700;text-decoration:none;border-bottom:1px solid var(--color-ink)}.manifest{display:grid;gap:var(--space-2xl);padding-block:clamp(4rem,8vw,7rem) clamp(5.5rem,11vw,9rem);border-bottom:1px solid var(--color-rule)}.manifest__title{min-width:0;max-width:11ch;margin:0;font-size:clamp(3rem,8vw,7rem);line-height:.94;letter-spacing:-.065em;overflow-wrap:anywhere}.manifest__lede{max-width:62ch;margin:0;color:var(--color-muted);font-size:clamp(1.05rem,1.7vw,1.3rem)}.manifest__aside{align-self:end;padding-block-start:var(--space-lg);border-top:1px solid var(--color-ink);font-family:var(--font-mono);font-size:.72rem}.label{display:block;margin-block-end:var(--space-md);font-family:var(--font-mono);font-size:.68rem;letter-spacing:.09em;text-transform:uppercase}.chapter{padding-block:var(--section-gap);border-bottom:1px solid var(--color-rule)}.chapter--tint{background:var(--color-paper-2)}.chapter__head{display:flex;flex-direction:column;gap:var(--space-md);margin-block-end:var(--space-2xl)}.chapter__head h2{min-width:0;max-width:15ch;margin:0;font-size:clamp(2.2rem,5vw,4.6rem);line-height:1;letter-spacing:-.055em;overflow-wrap:anywhere}.chapter__head p{max-width:65ch;margin:0;color:var(--color-muted)}.fact-list{display:grid;border-top:1px solid var(--color-rule)}.fact{display:grid;gap:var(--space-md);padding-block:var(--space-xl);border-bottom:1px solid var(--color-rule)}.fact b{font-family:var(--font-mono);font-size:.7rem;text-transform:uppercase;letter-spacing:.07em}.fact h3{margin:0;font-size:clamp(1.25rem,2vw,1.8rem);letter-spacing:-.03em}.fact p{max-width:65ch;margin:0;color:var(--color-muted)}.guide-index{display:grid;border-top:1px solid var(--color-ink)}.guide{display:grid;gap:var(--space-md);padding-block:var(--space-xl);border-bottom:1px solid var(--color-rule)}.guide__number{font-family:var(--font-mono);font-size:.72rem}.guide h2,.guide h3{min-width:0;margin:0;font-size:clamp(1.6rem,3vw,2.8rem);line-height:1.05;letter-spacing:-.045em;overflow-wrap:anywhere}.guide p{max-width:64ch;margin:0;color:var(--color-muted)}.guide ul{max-width:65ch;margin:0;padding-inline-start:1.2rem}.guide li+li{margin-block-start:var(--space-sm)}.source-note{max-width:68ch;padding:var(--space-lg);border:1px solid var(--color-rule);border-radius:var(--radius-card);background:var(--color-white)}.source-note h3{margin-block-start:0}.source-note p:last-child{margin-block-end:0}.cta-band{padding-block:var(--section-gap);background:var(--color-ink);color:var(--color-paper)}.cta-band__inner{display:grid;gap:var(--space-xl);align-items:end}.cta-band h2{max-width:14ch;margin:0;font-size:clamp(2.3rem,5vw,4.8rem);line-height:1;letter-spacing:-.055em}.cta-band p{max-width:58ch;color:var(--color-paper-3)}.button{display:inline-flex;width:max-content;align-items:center;justify-content:center;min-height:50px;padding:.75rem 1.25rem;border:1px solid var(--color-accent-deep);border-radius:var(--radius-pill);background:var(--color-accent);color:var(--color-accent-ink);font-weight:700;text-decoration:none;transition:transform var(--dur-short) var(--ease-out)}.button:hover{transform:translateY(-2px)}.button:active{transform:translateY(1px)}.button[aria-disabled=true]{opacity:.55;cursor:not-allowed;pointer-events:none}.page-footer{padding-block:var(--space-xl)}.page-footer__line{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:var(--space-md);font-size:.75rem}.page-footer__links{display:flex;flex-wrap:wrap;gap:var(--space-md)}.page-footer a{white-space:nowrap}.brand-logo{text-decoration:none}@media(min-width:40rem){.site-nav nav{display:flex}.manifest{grid-template-columns:minmax(0,1.7fr) minmax(14rem,.5fr)}.manifest__lede{grid-column:1}.manifest__aside{grid-column:2;grid-row:1/3}.fact{grid-template-columns:8rem minmax(0,1fr) minmax(0,1.2fr);align-items:start}.guide{grid-template-columns:4rem minmax(0,.8fr) minmax(0,1.2fr);align-items:start}.cta-band__inner{grid-template-columns:minmax(0,1.4fr) minmax(0,1fr)}}@media(max-width:24rem){.site-nav{align-items:flex-start;padding-block:var(--space-md)}.nav-cta{font-size:.72rem}.manifest__title{font-size:clamp(2.65rem,15vw,3.6rem)}}@media(prefers-reduced-motion:reduce){*,*:before,*:after{animation-duration:.01ms!important;animation-iteration-count:1!important;transition-duration:.01ms!important}}