:root{--c-ink: #1a1a1a;--c-ink-soft: #4a4a4a;--c-mute: #9a9a9a;--c-paper: #f8f6f1;--c-hairline: #e4e0d8;--c-sink: #2f4159;--c-cooperative: #2c5f4f;--c-adversarial: #8b3a2f;--c-faucet: #c8924a;--brand-page-bg: var(--c-paper);--brand-body-text: var(--c-ink);--brand-accent: #1f4e5f;--brand-accent-hover: #15384a;--brand-accent-muted: rgba(31, 78, 95, .1);--brand-accent-ring: rgba(31, 78, 95, .35);--brand-prose-maxw: 640px;--brand-figure-maxw: 1100px;--brand-topbar-h: 56px;--font-display: "Source Serif 4", "Charter", "Georgia", "Times New Roman", serif;--font-body: "Source Serif 4", "Charter", "Georgia", "Times New Roman", serif;--font-sans: "Inter", "Helvetica Neue", "Arial", system-ui, sans-serif;--font-mono: "JetBrains Mono", ui-monospace, "SF Mono", Menlo, Consolas, monospace;--fs-display-xl: 2.5rem;--fs-display-lg: 2rem;--fs-display-md: 1.5rem;--fs-display-sm: 1.25rem;--fs-body-lg: 1.125rem;--fs-body: 1.0625rem;--fs-body-sm: .9375rem;--fs-caption: .8125rem;--fs-chrome: .875rem;--fs-h1: var(--fs-display-lg);--fs-h2: var(--fs-display-md);--fs-small: var(--fs-body-sm);--lh-tight: 1.2;--lh-display: 1.15;--lh-body: 1.7;--motion-ease-standard: cubic-bezier(.4, 0, .2, 1);--motion-ease-out-soft: cubic-bezier(0, 0, .2, 1);--motion-dur-quick: .12s;--motion-dur-annotate: .22s;--motion-dur-reveal: .4s;--space-1: 4px;--space-2: 8px;--space-3: 12px;--space-4: 16px;--space-5: 24px;--space-6: 32px;--space-8: 48px;--space-10: 64px;--radius-sm: 4px;--radius-md: 8px;--scrolly-step-border-w: 2px;--scrolly-step-active-bg: rgba(31, 78, 95, .06)}*{box-sizing:border-box}html,body{margin:0;padding:0;background:var(--brand-page-bg);color:var(--brand-body-text);font-family:var(--font-body);font-size:var(--fs-body);line-height:var(--lh-body);-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility}a{color:var(--brand-accent);text-decoration:underline;text-underline-offset:.15em;text-decoration-thickness:.075em;text-decoration-color:var(--c-hairline);transition:color var(--motion-dur-quick) var(--motion-ease-standard),text-decoration-color var(--motion-dur-quick) var(--motion-ease-standard)}a:hover{color:var(--brand-accent-hover);text-decoration-color:var(--brand-accent)}a:focus-visible{outline:2px solid var(--brand-accent);outline-offset:2px;border-radius:var(--radius-sm)}h1,h2,h3{font-family:var(--font-display);font-weight:600;letter-spacing:-.01em;line-height:var(--lh-display);margin:0 0 .5em}h1{font-size:var(--fs-display-xl)}h2{font-size:var(--fs-display-lg);margin-top:1.5em}h3{font-size:var(--fs-display-md);margin-top:1.2em}p{margin:0 0 1em;max-width:var(--brand-prose-maxw)}code,.num{font-family:var(--font-mono);font-variant-numeric:tabular-nums}.placeholder-note{display:inline-block;margin:.25em 0;padding:.15em .5em;background:#9a9a9a1f;border:1px dashed var(--c-mute);font-family:var(--font-mono);font-size:var(--fs-caption);color:var(--c-ink-soft);border-radius:3px}.page{max-width:var(--brand-figure-maxw);margin:0 auto;padding:3rem 1.5rem 6rem}.eyebrow{font-family:var(--font-mono);font-size:var(--fs-caption);letter-spacing:.08em;text-transform:uppercase;color:var(--c-mute);margin-bottom:.75rem}.lede{font-size:var(--fs-body-lg);color:var(--c-ink-soft);max-width:var(--brand-prose-maxw);margin-bottom:2.5rem;line-height:1.55}.scrolly{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1.3fr);gap:2.5rem;margin:3rem 0;align-items:start}.scrolly__prose{display:flex;flex-direction:column;gap:70vh;padding-top:25vh;padding-bottom:25vh}.scrolly__step{min-height:30vh;padding:1.25rem 1.5rem;border-left:var(--scrolly-step-border-w) solid var(--c-hairline);background:#e4e0d82e;transition:border-color var(--motion-dur-reveal) var(--motion-ease-standard),background var(--motion-dur-reveal) var(--motion-ease-standard)}.scrolly__step.is-active{border-left-color:var(--brand-accent);background:var(--scrolly-step-active-bg)}.scrolly__sticky{position:sticky;top:8vh;height:84vh;display:flex;flex-direction:column}@media(max-width:800px){.scrolly{grid-template-columns:1fr}.scrolly__sticky{position:relative;top:0;height:auto;order:-1}.scrolly__prose{gap:2rem;padding-top:0;padding-bottom:0}.scrolly__step{min-height:0}}@media(prefers-reduced-motion:reduce){*,*:before,*:after{transition-duration:.01ms!important;animation-duration:.01ms!important;animation-iteration-count:1!important}}.control{display:flex;flex-direction:column;gap:.4rem;padding:1rem 1.25rem;background:var(--c-paper);border:1px solid var(--c-hairline);border-radius:var(--radius-sm);margin-top:1rem}.control__label{font-family:var(--font-mono);font-size:var(--fs-caption);color:var(--c-ink-soft);display:flex;justify-content:space-between;align-items:baseline}.control__label strong{font-weight:600;color:var(--c-ink)}.control__hint{font-size:var(--fs-caption);color:var(--c-mute)}input[type=range]{-webkit-appearance:none;appearance:none;width:100%;height:4px;background:var(--c-hairline);border-radius:2px;outline:none;margin:.5rem 0}input[type=range]::-webkit-slider-thumb{-webkit-appearance:none;appearance:none;width:18px;height:18px;background:var(--brand-accent);border-radius:50%;cursor:pointer;transition:transform var(--motion-dur-quick) var(--motion-ease-out-soft)}input[type=range]:focus-visible::-webkit-slider-thumb,input[type=range]:hover::-webkit-slider-thumb{transform:scale(1.15)}input[type=range]::-moz-range-thumb{width:18px;height:18px;background:var(--brand-accent);border:none;border-radius:50%;cursor:pointer}input[type=range]:focus-visible{outline:2px solid var(--brand-accent-ring);outline-offset:4px;border-radius:2px}.caption{font-family:var(--font-sans);font-style:italic;font-size:var(--fs-caption);color:var(--c-mute);margin-top:.5rem}.topbar{border-bottom:1px solid var(--c-hairline);padding:.875rem 1.5rem;display:flex;justify-content:space-between;align-items:baseline;font-family:var(--font-sans);font-size:var(--fs-chrome);color:var(--c-ink-soft);letter-spacing:.02em;min-height:var(--brand-topbar-h)}.topbar__brand{color:var(--c-ink);font-family:var(--font-display);font-weight:600;font-size:1.125rem;letter-spacing:-.01em;text-transform:none}.topbar__right{font-family:var(--font-sans);font-size:var(--fs-caption);color:var(--c-mute);letter-spacing:.04em}