/* Proof21 v1.1 — e-paper, aluminum, ink, signal. No framework runtime. */
@import url('./tokens.css');
:root{--paper:var(--p21-paper);--ink:var(--p21-ink);--muted:var(--p21-muted);--line:var(--p21-line);--orange:var(--p21-signal);--orange-ink:var(--p21-signal-ink);--sans:Inter,-apple-system,BlinkMacSystemFont,'Segoe UI',sans-serif;--mono:'IBM Plex Mono',ui-monospace,SFMono-Regular,Consolas,monospace}
*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:104px}body{margin:0;color:var(--ink);background:var(--paper);font-family:var(--sans);font-size:16px;line-height:1.6;-webkit-font-smoothing:antialiased}a{color:inherit;text-decoration-thickness:1px;text-underline-offset:4px}a:hover{color:var(--orange-ink)}button,input,select{font:inherit}button,a{-webkit-tap-highlight-color:transparent}button{cursor:pointer}button:disabled{cursor:default}a:focus-visible,button:focus-visible,input:focus-visible,summary:focus-visible{outline:2px solid var(--orange-ink);outline-offset:5px}button{color:inherit}img,svg{max-width:100%}::selection{background:#ef5b2a30}h1,h2,h3,h4{line-height:1.15;letter-spacing:-.045em;font-weight:550;margin:0 0 20px}h1{font-size:clamp(42px,5.5vw,76px)}h2{font-size:clamp(30px,3.3vw,46px)}h3{font-size:23px;letter-spacing:-.025em}p{margin:0 0 20px}hr{border:0;border-top:1px solid var(--line);margin:30px 0}code,kbd,pre{font-family:var(--mono);font-variant-ligatures:none}code{font-size:.86em;background:#e9ebe6;padding:2px 5px;border-radius:4px;overflow-wrap:anywhere}pre{position:relative;border:1px solid var(--line);border-radius:12px;background:#eeefeb;padding:22px;line-height:1.65;font-size:12px;overflow:auto}pre code{background:transparent;padding:0;white-space:pre;overflow-wrap:normal;font-size:inherit}blockquote{border-left:2px solid var(--orange);padding:2px 0 2px 22px;margin:26px 0;color:var(--muted)}table{border-collapse:collapse;width:100%;font-size:14px;line-height:1.55}td,th{border-bottom:1px solid var(--line);text-align:left;padding:14px 16px;vertical-align:top}th{font-size:11px;font-family:var(--mono);letter-spacing:.04em;background:#e9ebe6;text-transform:uppercase}ul,ol{padding-left:24px}li{margin:8px 0}.table-scroll{overflow:auto;max-width:100%;border:1px solid var(--line);border-radius:10px;margin:26px 0}.table-scroll table{min-width:540px}.table-scroll tr:last-child td{border-bottom:0}.wrap{max-width:1280px;padding:0 40px;margin:auto}.skip{position:absolute;left:20px;top:-90px;background:var(--paper);padding:12px;z-index:100}.skip:focus{top:12px}.topbar{position:sticky;top:0;background:#f5f5f3f5;backdrop-filter:blur(14px);z-index:30;border-bottom:1px solid var(--line)}.header{max-width:1510px;margin:auto;padding:23px 40px;display:flex;align-items:center;gap:36px}.wordmark{font-size:29px;font-weight:600;letter-spacing:-1.6px;text-decoration:none;line-height:1}.wordmark span{color:var(--orange)}.desktop-nav{display:flex;gap:26px;margin-left:auto;align-items:center;font-size:13px}.desktop-nav a{text-decoration:none}.desktop-nav a[aria-current=page]{border-bottom:2px solid var(--orange);padding-bottom:5px}.header-tools{display:flex;gap:14px;align-items:center}.search-open{display:flex;align-items:center;gap:24px;border:1px solid var(--line);border-radius:8px;background:transparent;color:var(--muted);font-size:12px;padding:8px 12px}.search-open kbd{font-size:10px;border:1px solid var(--line);border-radius:4px;padding:1px 4px}.mobile-nav{display:none}.status-label{font:10px var(--mono);letter-spacing:.09em;text-transform:uppercase;display:flex;gap:8px;align-items:center;color:var(--muted)}.status-label:before{content:'';background:var(--orange);width:6px;height:6px;border-radius:50%}.eyebrow{font:10px var(--mono);text-transform:uppercase;letter-spacing:.13em;color:var(--muted);margin:0 0 24px;line-height:1.7}.eyebrow .signal{display:inline-block;width:6px;height:6px;background:var(--orange);border-radius:50%;margin-right:8px}.hero{display:grid;grid-template-columns:1.1fr 1fr;gap:60px;padding:78px 0 66px;align-items:center}.hero h1{letter-spacing:-.065em;line-height:1.02;margin-bottom:28px}.hero h1 span{color:var(--muted)}.lead{font-size:19px;line-height:1.65;color:var(--muted);max-width:580px}.actions{display:flex;align-items:center;gap:12px;flex-wrap:wrap;margin:32px 0 22px}.button{display:inline-flex;align-items:center;justify-content:center;gap:22px;border:1px solid var(--muted);padding:12px 18px;border-radius:8px;text-decoration:none;font-size:13px;min-height:46px;background:transparent;line-height:1.5;transition:transform .15s,border-color .15s}.button:hover{transform:translateY(-1px);border-color:var(--orange-ink)}.button.primary{background:var(--orange);border-color:var(--orange);color:var(--ink);font-weight:550}.button.dark{background:var(--ink);color:var(--paper);border-color:var(--ink)}.small{font-size:12px;color:var(--muted)}.instrument{position:relative;padding:26px 28px;border:1px solid #bfc2bb;border-radius:24px;background:linear-gradient(135deg,#fdfdfb 0%,#e6e8e2 100%);box-shadow:inset 0 0 0 5px #ffffff80,0 14px 28px #181a1808}.instrument:after{content:'';position:absolute;right:-5px;top:128px;width:4px;height:28px;border-radius:4px;background:var(--orange);box-shadow:1px 1px 2px #181a1830}.instrument-top{display:flex;justify-content:space-between;gap:20px;border-bottom:1px solid #c6c9c1;padding-bottom:15px;align-items:center}.instrument .eyebrow{margin:0;font-size:9px}.dot-display{width:100%;height:162px;margin:18px 0 4px;display:block}.instrument-caption{font-size:12px;color:var(--muted);border-top:1px solid #c6c9c1;padding-top:18px}.instrument-row{display:flex;align-items:center;justify-content:space-between;gap:20px;padding:12px 0;border-top:1px solid #c6c9c1;font:11px var(--mono)}.instrument-row span:last-child{color:var(--muted)}.instrument-bottom{display:flex;align-items:center;justify-content:space-between;padding-top:16px;gap:15px}.motion-control{font:11px var(--mono);padding:6px 10px;border:1px solid var(--muted);border-radius:6px;background:transparent}.tiny-link{font-size:12px}.scope-strip{display:flex;gap:25px;align-items:center;padding:22px 0;border-top:1px solid var(--line);border-bottom:1px solid var(--line);font:11px var(--mono);color:var(--muted);flex-wrap:wrap}.scope-strip .label{font-size:9px;letter-spacing:.06em;text-transform:uppercase;margin-right:auto}.scope-strip a{text-decoration:none}.section{padding:70px 0;border-bottom:1px solid var(--line)}.section-header{display:flex;justify-content:space-between;align-items:flex-end;gap:40px;margin-bottom:35px}.section-header h2{margin:0}.section-header p{margin:0;max-width:430px;font-size:15px;color:var(--muted)}.feature-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}.feature-card{padding:28px;border:1px solid var(--line);border-radius:12px;background:#ffffff45;min-height:240px;position:relative}.feature-card:first-child{border-top:2px solid var(--orange)}.card-number{font:11px var(--mono);color:var(--orange-ink);letter-spacing:.06em}.feature-card h3{margin:28px 0 14px}.feature-card p{color:var(--muted);font-size:14px;max-width:32em}.feature-card a{text-decoration:none;font-size:12px}.feature-card a:after{content:' ↗';color:var(--orange-ink)}.feature-card .badge{position:absolute;top:22px;right:20px}.badge{font:9px var(--mono);border:1px solid var(--line);border-radius:20px;color:var(--muted);padding:4px 9px;white-space:nowrap;display:inline-block}.badge.orange{border-color:#dfaa91;color:var(--orange-ink)}.two-columns{display:grid;grid-template-columns:1fr 1fr;gap:65px}.principle{padding:26px 0;border-top:1px solid var(--line)}.principle p{font-size:14px;color:var(--muted);margin-bottom:0}.principle h3{font-size:20px}.principle .card-number{margin-right:12px}.diagram{border:1px solid var(--line);padding:22px;border-radius:12px;background:#fafbf8;margin:30px 0;overflow:hidden}.diagram img{width:100%;height:auto;display:block}.diagram figcaption{font-size:12px;color:var(--muted);margin-top:18px}.diagram details{margin-top:12px}.diagram summary{font:11px var(--mono);color:var(--muted);cursor:pointer}.diagram a{font:11px var(--mono);display:inline-block;margin-top:10px}.diagram pre{white-space:pre;max-width:100%;font-size:11px}.cta-panel{background:#e9ebe5;border:1px solid var(--line);border-radius:14px;padding:42px;display:flex;align-items:center;justify-content:space-between;gap:40px}.cta-panel h2{font-size:34px;margin-bottom:12px}.cta-panel p{color:var(--muted);margin:0;max-width:600px}.page-hero{padding:62px 0 45px;border-bottom:1px solid var(--line)}.page-hero h1{max-width:900px}.page-hero p.lead{max-width:730px}.notice{font-size:13px;color:var(--muted);border-left:2px solid var(--orange);padding:0 0 0 16px;margin:24px 0}.integration-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}.integration-card{border:1px solid var(--line);border-radius:12px;padding:26px;background:#ffffff45;display:flex;flex-direction:column;gap:12px}.integration-card h3{font-size:21px;margin:0}.integration-card p{font-size:14px;color:var(--muted);margin:0;flex:1}.integration-card .eyebrow{margin:0;font-size:9px}.integration-card a{font-size:12px}.article-list{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}.journal-card{border-top:1px solid var(--line);padding:22px 0}.journal-card a{text-decoration:none}.journal-card h3{font-size:24px;line-height:1.3;margin:20px 0}.journal-card p{font-size:14px;color:var(--muted)}.article-layout{display:grid;grid-template-columns:minmax(0,760px) 200px;gap:80px;max-width:1080px;margin:auto;padding:50px 40px 75px}.prose{min-width:0;font-size:16px;line-height:1.8}.prose>h1{font-size:38px;margin-top:0}.prose h2{font-size:27px;margin-top:48px;line-height:1.25}.prose h3{font-size:20px;margin-top:32px}.prose p{margin-bottom:20px}.prose a{color:var(--orange-ink);overflow-wrap:anywhere}.prose strong{font-weight:600}.prose .heading-anchor{font-size:.7em;color:var(--muted);text-decoration:none;margin-left:9px;opacity:0}.prose h2:hover .heading-anchor,.prose .heading-anchor:focus{opacity:1}.prose .diagram{margin-left:0;margin-right:0}.prose ul{margin:18px 0}.toc{font-size:12px;color:var(--muted);position:sticky;top:112px;align-self:start;max-height:calc(100vh - 140px);overflow:auto}.toc h2{font:10px var(--mono);letter-spacing:.1em;text-transform:uppercase;margin-bottom:20px}.toc a{display:block;padding:7px 0;text-decoration:none;border-left:1px solid var(--line);padding-left:15px;line-height:1.5}.toc a:hover{border-color:var(--orange)}.toc .sub{font-size:11px;padding-left:26px}.doc-shell{max-width:1540px;margin:auto;display:grid;grid-template-columns:245px minmax(0,810px) 200px;gap:46px;padding:0 34px}.doc-sidebar{border-right:1px solid var(--line);padding:30px 24px 60px 0;position:sticky;top:88px;align-self:start;max-height:calc(100vh - 88px);overflow:auto;scrollbar-width:thin}.doc-sidebar>summary{display:none}.doc-sidebar section{margin:22px 0}.doc-sidebar h2{font:9px var(--mono);color:var(--muted);letter-spacing:.08em;text-transform:uppercase;margin:26px 0 10px;line-height:1.5}.doc-sidebar a{display:block;padding:7px 10px;font-size:12px;line-height:1.5;text-decoration:none;border-radius:6px;margin:2px 0}.doc-sidebar a.active{background:#e7e9e2;border-left:2px solid var(--orange);padding-left:8px;color:var(--ink)}.doc-sidebar a:hover{background:#eceee7}.doc-sidebar .sidebar-title{font-size:19px;letter-spacing:-.04em;font-weight:550;display:block;margin-bottom:15px}.doc-main{padding:35px 0 80px;min-width:0}.doc-main>h1{font-size:40px;line-height:1.15;letter-spacing:-.05em;margin:20px 0 16px}.doc-meta{display:flex;gap:15px;justify-content:space-between;align-items:center;color:var(--muted);font:10px var(--mono)}.doc-tools{display:flex;align-items:center;gap:14px;flex-wrap:wrap;border-bottom:1px solid var(--line);padding:8px 0 24px;margin-bottom:26px}.doc-tools button,.doc-tools a{font-size:11px;background:transparent;border:0;padding:0;line-height:1.7;text-decoration:underline;text-underline-offset:4px;color:var(--muted)}.doc-shell>.toc{padding-top:41px}.doc-pager{border-top:1px solid var(--line);margin-top:50px;padding-top:22px;display:grid;grid-template-columns:1fr 1fr;gap:20px}.doc-pager a{text-decoration:none;font-size:13px;color:var(--ink)}.doc-pager a:last-child{text-align:right}.doc-pager span{display:block;font:9px var(--mono);text-transform:uppercase;color:var(--muted);margin-bottom:6px}.copy-code{position:absolute;right:8px;top:8px;border:1px solid var(--line);border-radius:5px;background:var(--paper);font:10px var(--mono);padding:4px 8px}.file-list{display:grid;gap:10px}.file-list a{display:flex;align-items:center;justify-content:space-between;gap:20px;border:1px solid var(--line);border-radius:8px;padding:16px 18px;text-decoration:none;font-size:14px}.file-list a small{color:var(--muted);font:10px var(--mono)}.footer{max-width:1280px;margin:auto;padding:40px;display:grid;grid-template-columns:1fr 1fr;gap:35px}.footer-links{display:flex;justify-content:flex-end;gap:20px;flex-wrap:wrap;align-items:center;font-size:12px}.footer-links a{display:flex;align-items:center;gap:6px;text-decoration:none}.icon{height:16px;width:16px;flex-shrink:0;vertical-align:middle}.footer .wordmark{font-size:23px}.footer .small{margin:18px 0 0;font-size:11px}.footer .legal{font:10px var(--mono);color:var(--muted);grid-column:1/-1;display:flex;justify-content:space-between;border-top:1px solid var(--line);padding-top:24px;gap:15px}.footer .unconfigured{font-size:10px;color:var(--muted);grid-column:1/-1;text-align:right}.search-dialog{padding:0;border:1px solid var(--line);border-radius:14px;background:var(--paper);width:min(690px,calc(100vw - 32px));max-height:80vh;margin:12vh auto auto;color:var(--ink);box-shadow:0 20px 80px #0003}.search-dialog::backdrop{background:#181a184f;backdrop-filter:blur(4px)}.search-head{display:flex;gap:12px;align-items:center;padding:20px;border-bottom:1px solid var(--line)}.search-head label{position:absolute;clip-path:inset(50%);width:1px;height:1px;overflow:hidden}.search-head input{min-width:0;flex:1;border:0;background:transparent;font-size:18px;outline:none;color:var(--ink)}.search-head button{background:transparent;border:1px solid var(--line);border-radius:5px;font:10px var(--mono);padding:6px}.search-results{padding:15px 20px;max-height:55vh;overflow:auto}.search-results a{display:block;padding:16px 10px;border-bottom:1px solid var(--line);text-decoration:none}.search-results strong{font-size:15px;display:block}.search-results p{font-size:12px;color:var(--muted);margin:6px 0 0}.search-results small{font:9px var(--mono);color:var(--orange-ink)}.search-note{font:10px var(--mono);color:var(--muted);padding:12px 20px;border-top:1px solid var(--line)}.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}.diagram-strip{display:grid;grid-template-columns:repeat(2,1fr);gap:22px}.diagram-strip .diagram{margin:0}.figure-tag{display:flex;justify-content:space-between;font:10px var(--mono);margin-bottom:12px;color:var(--muted)}.live-off{padding:15px 18px;border:1px solid var(--line);border-radius:8px;font:12px var(--mono);color:var(--muted);background:#eeefea}.schema-method{font:11px var(--mono);color:var(--orange-ink);margin-right:12px}.api-operation{padding:22px 0;border-top:1px solid var(--line)}.api-operation h3{font-family:var(--mono);font-size:15px;letter-spacing:0;overflow-wrap:anywhere}.motion-dot{transition:opacity .25s,fill .25s}.is-playing .motion-dot{animation:dotPulse 3.6s ease-in-out both;animation-delay:var(--delay,0s)}.is-playing .trace-dot{animation:tracePulse 3.6s ease-in-out both;animation-delay:var(--delay,0s)}@keyframes dotPulse{0%,100%{opacity:1}25%{opacity:.15}50%{opacity:1;fill:var(--orange)}75%{opacity:1}}@keyframes tracePulse{0%,100%{opacity:.25}40%{opacity:1;fill:var(--orange)}}
@media(min-width:1500px){.doc-shell{grid-template-columns:250px minmax(0,840px) 210px;gap:60px}}@media(max-width:1150px){.desktop-nav{gap:18px}.header{gap:22px}.search-open span{display:none}.search-open{gap:8px}.hero{gap:32px}.hero h1{font-size:61px}.doc-shell{grid-template-columns:210px minmax(0,1fr);gap:36px}.doc-shell>.toc{display:none}.article-layout{gap:40px}.status-label{display:none}}
@media(max-width:900px){.header{padding:20px 24px}.desktop-nav{display:none}.header-tools{margin-left:auto}.mobile-nav{display:block}.mobile-nav summary{font-size:12px;cursor:pointer;list-style:none;padding:8px}.mobile-nav nav{position:absolute;left:16px;right:16px;top:76px;padding:20px;background:var(--paper);border:1px solid var(--line);border-radius:10px;box-shadow:0 12px 30px #0001}.mobile-nav nav a{display:block;padding:12px;font-size:15px;text-decoration:none}.wrap{padding:0 26px}.hero{padding:52px 0 44px;gap:38px;grid-template-columns:1fr}.hero h1{font-size:clamp(43px,7vw,64px)}.hero .lead{max-width:610px}.instrument{max-width:590px;width:100%}.feature-grid,.integration-grid{grid-template-columns:repeat(2,1fr)}.section{padding:50px 0}.section-header{display:block}.section-header p{margin-top:20px;max-width:650px}.two-columns{grid-template-columns:1fr;gap:25px}.article-list{grid-template-columns:1fr}.journal-card{display:grid;grid-template-columns:180px 1fr;gap:24px}.journal-card h3{margin-top:0}.article-layout{grid-template-columns:1fr;padding:36px 26px 60px}.article-layout>.toc{display:none}.doc-shell{display:block;padding:0 26px}.doc-sidebar{position:static;border:1px solid var(--line);padding:16px;margin:20px 0;max-height:none;border-radius:8px}.doc-sidebar>summary{display:block;font:12px var(--mono);cursor:pointer;list-style:none}.doc-sidebar>summary:after{content:' +';float:right;color:var(--orange-ink)}.doc-sidebar[open]>summary:after{content:' −'}.doc-sidebar .sidebar-title{display:none}.doc-sidebar nav{max-height:55vh;overflow:auto;padding-top:12px}.doc-main{padding-top:10px}.doc-main>h1{font-size:35px}.cta-panel{padding:30px;display:block}.cta-panel .actions{margin-bottom:0}.footer{padding:30px 26px}.diagram-strip{grid-template-columns:1fr}.scope-strip{gap:18px}}
@media(max-width:560px){.header{padding:20px}.wrap{padding:0 20px}.wordmark{font-size:27px}.header-tools>.button{display:none}.hero{padding:38px 0}.hero h1{font-size:44px}.lead{font-size:17px}.actions{gap:10px}.actions .button{padding:12px 14px;gap:12px}.instrument{padding:22px;border-radius:19px}.dot-display{height:138px;margin-top:12px}.feature-grid,.integration-grid{grid-template-columns:1fr}.feature-card{min-height:0;padding:24px}.feature-card h3{margin-top:22px}.scope-strip{font-size:10px;gap:16px}.scope-strip .label{flex-basis:100%;margin:0}.section{padding:42px 0}.page-hero{padding:38px 0 28px}.page-hero h1{font-size:42px}.journal-card{display:block}.journal-card h3{margin-top:16px}.footer{grid-template-columns:1fr;padding:30px 20px}.footer-links{justify-content:flex-start;gap:18px}.footer .legal{flex-direction:column}.footer .unconfigured{text-align:left}.doc-shell{padding:0 20px}.doc-meta{flex-wrap:wrap;font-size:9px}.doc-main>h1{font-size:32px}.doc-tools{gap:20px}.prose{font-size:15px}.prose h2{font-size:25px}.article-layout{padding:32px 20px 54px}.prose pre{padding:18px;font-size:11px}.diagram{padding:13px}.toc{display:none}.cta-panel{padding:26px}.cta-panel h2{font-size:29px}.doc-pager{gap:12px}.table-scroll table{min-width:480px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*{animation:none!important;transition:none!important}.button:hover{transform:none}}
@media print{.topbar,.footer,.doc-sidebar,.toc,.doc-tools,.doc-pager,.search-dialog,.motion-control,.copy-code,.actions,.notice.preview-note{display:none!important}.wrap,.article-layout,.doc-shell{display:block;max-width:none;padding:0}.doc-main{padding:0}.prose{font-size:11pt}.prose h2{break-after:avoid}body{background:white;color:black}.diagram,pre,table{break-inside:avoid}.table-scroll{overflow:visible}a{color:inherit!important}.page-hero{padding:0 0 25px}h1{font-size:30pt}.section{padding:25px 0}}

.hero h1{font-size:clamp(44px,4.7vw,66px)}.search-open,[data-motion],[data-copy-markdown],[data-print]{display:none}.js .search-open{display:flex}.js [data-motion],.js [data-copy-markdown],.js [data-print]{display:inline-flex}@media(max-width:560px){.hero h1{font-size:42px}}