:root{--ink:#14181f;--slate:#4a5568;--muted:#6b7280;--line:#e6e8ec;--paper:#fff;--paper-2:#f7f8fa;--accent:#1f3a5f;--accent-soft:#eef2f7;--maxw:44rem;--maxw-wide:64rem;--font-serif:"Iowan Old Style", "Palatino Linotype", Palatino, "Book Antiqua", Georgia, serif;--font-sans:-apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;--step--1:clamp(.83rem, .8rem + .15vw, .92rem);--step-0:clamp(1rem, .96rem + .2vw, 1.12rem);--step-1:clamp(1.2rem, 1.1rem + .5vw, 1.4rem);--step-2:clamp(1.5rem, 1.3rem + 1vw, 2rem);--step-3:clamp(1.9rem, 1.5rem + 2vw, 2.9rem);--step-4:clamp(2.3rem, 1.7rem + 3vw, 3.6rem)}*,:before,:after{box-sizing:border-box}html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}body{font-family:var(--font-sans);font-size:var(--step-0);color:var(--ink);background:var(--paper);text-rendering:optimizelegibility;-webkit-font-smoothing:antialiased;margin:0;line-height:1.65}h1,h2,h3,h4{font-family:var(--font-serif);color:var(--ink);letter-spacing:-.01em;font-weight:600;line-height:1.15}h1{font-size:var(--step-4);margin:0 0 .4em}h2{font-size:var(--step-2);margin:2.4em 0 .6em}h3{font-size:var(--step-1);margin:1.8em 0 .4em}p,ul,ol{margin:0 0 1.1em}a{color:var(--accent);text-underline-offset:.18em;text-decoration:none}a:hover{text-decoration:underline}strong{font-weight:600}hr{border:0;border-top:1px solid var(--line);margin:3rem 0}.wrap{width:100%;max-width:var(--maxw);margin-inline:auto;padding-inline:1.4rem}.wrap--wide{max-width:var(--maxw-wide)}main{display:block}section{padding-block:2rem}.lead{font-size:var(--step-1);color:var(--slate);line-height:1.5}.eyebrow{font-family:var(--font-sans);text-transform:uppercase;letter-spacing:.14em;font-size:var(--step--1);color:var(--muted);margin:0 0 .8rem;font-weight:600}.muted{color:var(--muted)}.site-header{border-bottom:1px solid var(--line);backdrop-filter:saturate(180%)blur(8px);z-index:10;background:#ffffffe6;position:sticky;top:0}.site-header__inner{flex-wrap:wrap;justify-content:space-between;align-items:center;gap:1rem;padding-block:.9rem;display:flex}.brand{font-family:var(--font-serif);color:var(--ink);letter-spacing:-.01em;font-size:1.15rem;font-weight:600}.brand:hover{text-decoration:none}.brand small{font-family:var(--font-sans);letter-spacing:.03em;color:var(--muted);text-transform:none;font-size:.72rem;font-weight:400;display:block}.site-nav{font-size:var(--step--1);flex-wrap:wrap;gap:1.3rem;display:flex}.site-nav a{color:var(--slate);font-weight:500}.site-nav a[aria-current=page]{color:var(--ink);text-decoration:underline;text-decoration-color:var(--accent)}.site-header__end{flex-wrap:wrap;align-items:center;gap:1.3rem;display:flex}.lang-switch{font-size:var(--step--1);color:var(--slate);border:1px solid var(--line);letter-spacing:.02em;border-radius:999px;padding:.15rem .6rem;font-weight:600;line-height:1.4}.lang-switch:hover{color:var(--ink);border-color:var(--accent);text-decoration:none}.site-footer{border-top:1px solid var(--line);color:var(--muted);font-size:var(--step--1);margin-top:4rem;padding-block:2.4rem}.site-footer__inner{flex-wrap:wrap;justify-content:space-between;gap:1rem;display:flex}.site-footer a{color:var(--slate)}.hero{padding-block:clamp(3rem,8vw,6rem) 1rem}.hero h1{max-width:18ch}.hero .lead{max-width:42ch;margin-top:1.2rem}.btn{font-family:var(--font-sans);font-size:var(--step--1);letter-spacing:.01em;border:1px solid var(--accent);border-radius:4px;padding:.7em 1.3em;font-weight:600;transition:background-color .15s,color .15s;display:inline-block}.btn--primary{background:var(--accent);color:#fff}.btn--primary:hover{background:#16293f;text-decoration:none}.btn--ghost{color:var(--accent);background:0 0}.btn--ghost:hover{background:var(--accent-soft);text-decoration:none}.btn-row{flex-wrap:wrap;gap:.8rem;margin-top:1.8rem;display:flex}.cards{grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:1.2rem;margin:1.5rem 0 0;padding:0;list-style:none;display:grid}.card{border:1px solid var(--line);background:var(--paper);border-radius:6px;padding:1.3rem 1.4rem}.card h3{font-size:var(--step-0);margin-top:0}.card p{color:var(--slate);font-size:var(--step--1);margin-bottom:0}.callout{border-left:3px solid var(--accent);background:var(--accent-soft);border-radius:0 6px 6px 0;margin:1.6rem 0;padding:1.1rem 1.4rem}.callout p:last-child{margin-bottom:0}.callout strong{color:var(--accent)}.attributes{counter-reset:attr;grid-template-columns:repeat(auto-fit,minmax(250px,1fr));gap:1rem;margin:1.5rem 0;padding:0;list-style:none;display:grid}.attributes li{border:1px solid var(--line);border-radius:6px;padding:1.1rem 1.2rem 1.1rem 3rem;position:relative}.attributes li:before{counter-increment:attr;content:counter(attr);font-family:var(--font-serif);color:var(--accent);font-size:1.1rem;font-weight:600;position:absolute;top:1.05rem;left:1rem}.attributes strong{display:block}.attributes span{color:var(--slate);font-size:var(--step--1)}.posts{margin:1.5rem 0 0;padding:0;list-style:none}.posts li{border-bottom:1px solid var(--line);padding:1.3rem 0}.posts li:first-child{border-top:1px solid var(--line)}.post-meta{font-size:var(--step--1);color:var(--muted);flex-wrap:wrap;gap:.7rem;margin-bottom:.3rem;display:flex}.post-title{font-size:var(--step-1);margin:.1rem 0 .3rem}.post-title a{color:var(--ink)}.tag{letter-spacing:.04em;text-transform:uppercase;color:var(--accent);background:var(--accent-soft);border-radius:3px;padding:.15em .6em;font-size:.72rem;font-weight:600;display:inline-block}.prose{max-width:var(--maxw)}.prose h2{margin-top:2.2em}.prose blockquote{border-left:3px solid var(--line);color:var(--slate);margin:1.6rem 0;padding-left:1.2rem;font-style:italic}.article-diagram{width:min(var(--maxw-wide), calc(100vw - 2.8rem));border:1px solid var(--line);background:var(--paper);-webkit-overflow-scrolling:touch;border-radius:6px;margin:2rem 50%;padding:1rem;overflow-x:auto;transform:translate(-50%)}.article-diagram img{width:100%;min-width:48rem;height:auto;display:block}.identity-proof-grid{width:min(var(--maxw-wide), calc(100vw - 2.8rem));border-top:1px solid var(--line);border-bottom:1px solid var(--line);grid-template-columns:repeat(4,minmax(0,1fr));margin:1.8rem 50% 2.2rem;padding:0;list-style:none;display:grid;transform:translate(-50%)}.identity-proof-grid li{border-right:1px solid var(--line);min-width:0;padding:1.25rem}.identity-proof-grid li:last-child{border-right:0}.identity-proof-grid__number{color:var(--accent);margin-bottom:.7rem;font-size:.72rem;font-weight:700;display:block}.identity-proof-grid strong{font-family:var(--font-serif);font-size:var(--step-0);margin-bottom:.4rem;display:block}.identity-proof-grid li>span:last-child{color:var(--slate);font-size:var(--step--1);line-height:1.5;display:block}.permission-model{width:min(var(--maxw-wide), calc(100vw - 2.8rem));border-left:4px solid var(--accent);background:var(--accent-soft);margin:1.8rem 50% 2.2rem;padding:1.4rem;transform:translate(-50%)}.permission-model__result{font-family:var(--font-serif);font-size:var(--step-1);color:var(--accent);margin:0 0 1rem;font-weight:600}.permission-model__result:after{content:" =";color:var(--ink)}.permission-model__factors{grid-template-columns:repeat(5,minmax(0,1fr));gap:1.7rem;display:grid}.permission-model__factors span{background:var(--paper);min-height:4.25rem;color:var(--ink);font-size:var(--step--1);text-align:center;border:1px solid #cbd5e1;place-items:center;padding:.75rem;font-weight:600;line-height:1.35;display:grid;position:relative}.permission-model__factors span:not(:first-child):before{content:"∩";color:var(--accent);font-family:var(--font-serif);font-size:1.35rem;font-weight:600;position:absolute;top:50%;left:-1.15rem;transform:translate(-50%,-50%)}@media (width<=760px){.identity-proof-grid{grid-template-columns:1fr}.identity-proof-grid li{border-right:0;border-bottom:1px solid var(--line);padding:1rem .2rem 1rem 2.7rem;position:relative}.identity-proof-grid li:last-child{border-bottom:0}.identity-proof-grid__number{position:absolute;top:1.2rem;left:.2rem}.permission-model{padding:1.1rem}.permission-model__factors{grid-template-columns:1fr;gap:1.6rem}.permission-model__factors span{min-height:3.5rem}.permission-model__factors span:not(:first-child):before{top:-.85rem;left:50%}}.prose code{background:var(--paper-2);border-radius:3px;padding:.1em .4em;font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-size:.9em}.prose table{border-collapse:collapse;width:100%;max-width:100%;font-size:var(--step--1);-webkit-overflow-scrolling:touch;margin:1.6rem 0;display:block;overflow-x:auto}.prose th,.prose td{border:1px solid var(--line);text-align:left;vertical-align:top;min-width:9rem;padding:.7rem .8rem}.prose th{color:var(--ink);background:var(--paper-2);font-weight:650}.skip-link{background:var(--ink);color:#fff;z-index:100;padding:.6em 1em;position:absolute;top:0;left:-999px}.skip-link:focus{top:.5rem;left:.5rem}:focus-visible{outline:2px solid var(--accent);outline-offset:2px}@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}*{transition:none!important}}