:root{
  --paper:#fbfaf7; --paper-2:#f2f0ea; --line:#e2ded5; --line-2:#cfcabd;
  --fg:#1c1e24; --fg-2:#5c6069; --fg-3:#8b8f98;
  --ink:#1e3f8f; --ink-2:#163070; --ink-soft:#e6ecfa; --ink-on:#fff;
  --rail:#161b2b; --rail-fg:#e9ebf2; --rail-mute:#8d93a8; --rail-line:#262c40; --rail-active:#232a44;
  --ok:#1f6b3a; --ok-soft:#dff2e5; --wait:#8a5a00; --wait-soft:#fbefd6; --err:#9b2c2c; --err-soft:#f9e3e3;
  --display:"Fraunces",Georgia,"Times New Roman",serif; --body:"IBM Plex Sans",system-ui,-apple-system,sans-serif; --mono:"IBM Plex Mono",ui-monospace,monospace;
  --radius:8px; --shadow:0 1px 2px rgba(20,22,30,.06),0 8px 24px -16px rgba(20,22,30,.25);
}
@media (prefers-color-scheme:dark){:root{
  --paper:#15171d; --paper-2:#1c1f27; --line:#2a2e39; --line-2:#3a3f4d; --fg:#ebe9e3; --fg-2:#a4a8b3; --fg-3:#767b88;
  --ink:#8fb0ff; --ink-2:#a9c2ff; --ink-soft:#1e2a48; --ink-on:#0f1424; --rail:#0e1017; --rail-mute:#7d8399; --rail-line:#1e2230; --rail-active:#1b2033;
  --ok:#6fd095; --ok-soft:#163222; --wait:#e9b55a; --wait-soft:#3a2c10; --err:#f08a8a; --err-soft:#3a1a1a; color-scheme:dark}}
*{box-sizing:border-box}
html,body{height:100%}
body{margin:0;background:var(--paper);color:var(--fg);font-family:var(--body);font-size:15px;line-height:1.5;-webkit-font-smoothing:antialiased}
button,input,select,textarea{font:inherit;color:inherit}
a{color:var(--ink)}
:focus-visible{outline:2px solid var(--ink);outline-offset:2px}
h1{font-family:var(--display);font-weight:600;font-size:30px;line-height:1.1;margin:0;letter-spacing:-.01em;text-wrap:balance}
h2{font-family:var(--display);font-weight:600;font-size:22px;margin:0 0 4px}
.lede{color:var(--fg-2);margin:6px 0 0;max-width:60ch}
.app{display:grid;grid-template-columns:248px 1fr;min-height:100%}
.rail{background:var(--rail);color:var(--rail-fg);display:flex;flex-direction:column;padding:22px 16px 16px;position:sticky;top:0;height:100vh}
.brand{display:flex;align-items:center;gap:11px;padding:4px 8px 22px;border-bottom:1px solid var(--rail-line);margin-bottom:14px;text-decoration:none;color:inherit}
.mark{width:36px;height:36px;flex:none}
.wordmark{font-family:var(--display);font-size:22px;font-weight:600;letter-spacing:-.01em;line-height:1}
.wordmark em{font-style:italic;font-weight:500;color:#9fb8ff}
.brand small{display:block;font-family:var(--mono);font-size:10px;letter-spacing:.14em;text-transform:uppercase;color:var(--rail-mute);margin-top:5px}
nav.main{display:grid;gap:2px}
.nav{display:flex;align-items:center;gap:12px;padding:10px 12px;border-radius:var(--radius);background:none;border:0;color:var(--rail-mute);text-align:left;cursor:pointer;font-weight:500;width:100%;text-decoration:none}
.nav svg{width:18px;height:18px;flex:none}
.nav:hover,.nav[aria-current="page"]{color:var(--rail-fg);background:var(--rail-active)}
.nav .count{margin-left:auto;font-family:var(--mono);font-size:11px;background:#3b63d1;color:#fff;padding:1px 7px;border-radius:999px}
.rail-foot{margin-top:auto;padding:14px 8px 0;border-top:1px solid var(--rail-line);font-size:12.5px;color:var(--rail-mute);display:grid;gap:6px}
.rail-foot b{color:var(--rail-fg);font-weight:500}
.rail-foot a{color:var(--rail-mute)}
.pane{min-width:0;padding:28px clamp(16px,4vw,48px) 64px}
.pane-head{display:flex;align-items:flex-end;justify-content:space-between;gap:16px;flex-wrap:wrap;margin-bottom:24px}
.view{display:grid;gap:20px;max-width:880px}
.topbar,.tabbar{display:none}
@media (max-width:860px){
  .app{grid-template-columns:1fr}.rail{display:none}
  .topbar{display:flex;align-items:center;gap:10px;padding:12px 16px;background:var(--rail);color:var(--rail-fg);position:sticky;top:0;z-index:5}
  .topbar .mark{width:28px;height:28px}.topbar .wordmark{font-size:19px}
  .pane{padding:20px 16px 90px}
  .tabbar{display:grid;grid-template-columns:repeat(3,1fr);position:fixed;left:0;right:0;bottom:0;background:var(--rail);border-top:1px solid var(--rail-line);padding:6px 8px 10px;z-index:5}
  .tabbar .nav{flex-direction:column;gap:3px;font-size:11px;padding:6px 4px;justify-content:center;text-align:center;position:relative}
  .tabbar .nav .count{margin:0;position:absolute;transform:translate(14px,-10px)}
}
.card{background:var(--paper);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow)}
.callout{display:grid;grid-template-columns:auto 1fr;gap:14px;padding:16px 18px;background:var(--ink-soft);border-radius:var(--radius)}
.callout svg{width:22px;height:22px;color:var(--ink);margin-top:2px}
.callout.warn{background:var(--wait-soft)}.callout.warn svg{color:var(--wait)}
.callout.err{background:var(--err-soft)}.callout.err svg{color:var(--err)}
.addr{display:inline-flex;align-items:center;gap:8px;flex-wrap:wrap;margin-top:6px}
code{font-family:var(--mono);font-size:13px;background:var(--paper);border:1px solid var(--line);padding:2px 8px;border-radius:5px;overflow-wrap:anywhere}
.btn{display:inline-flex;align-items:center;gap:7px;font-weight:600;font-size:14px;line-height:1.2;color:var(--ink-on);background:var(--ink);border:1px solid transparent;padding:9px 14px;border-radius:7px;cursor:pointer;text-decoration:none;white-space:nowrap}
.btn:hover{background:var(--ink-2)}
.btn.ghost{color:var(--ink);background:transparent;border-color:var(--line-2)}.btn.ghost:hover{background:var(--ink-soft)}
.btn.danger{color:var(--err);background:transparent;border-color:var(--line-2)}
.btn.sm{padding:5px 10px;font-size:13px;font-weight:500}
.btn.big{padding:13px 22px;font-size:16px}
.btn:disabled{opacity:.55;cursor:default}
.btn svg{width:16px;height:16px}
.chip{font-family:var(--mono);font-size:11px;letter-spacing:.08em;text-transform:uppercase;padding:3px 9px;border-radius:999px;white-space:nowrap;font-weight:500}
.chip.ok{color:var(--ok);background:var(--ok-soft)}.chip.wait{color:var(--wait);background:var(--wait-soft)}
.chip.mute{color:var(--fg-2);background:var(--paper-2)}.chip.err{color:var(--err);background:var(--err-soft)}
.toast{position:fixed;left:50%;bottom:24px;transform:translate(-50%,0);background:var(--fg);color:var(--paper);padding:10px 16px;border-radius:8px;font-size:14px;z-index:9;box-shadow:var(--shadow);animation:fade 3s forwards}
@keyframes fade{0%,70%{opacity:1}100%{opacity:0;visibility:hidden}}
.stats{display:grid;grid-template-columns:repeat(3,1fr);gap:12px}
.stat{padding:14px 16px;border:1px solid var(--line);border-radius:var(--radius);background:var(--paper-2)}
.stat .n{font-family:var(--display);font-size:28px;font-weight:600;line-height:1;font-variant-numeric:tabular-nums}
.stat .l{font-size:12px;color:var(--fg-2);margin-top:4px;letter-spacing:.04em;text-transform:uppercase}
.ledger{overflow:hidden}
.doc{display:grid;gap:12px;padding:18px 20px;border-top:1px solid var(--line)}
.doc:first-child{border-top:0}
.doc-head{display:flex;justify-content:space-between;gap:12px;flex-wrap:wrap;align-items:flex-start}
.doc h3{font-family:var(--display);font-weight:500;font-size:20px;margin:0;line-height:1.25}
.doc h3 a{color:inherit;text-decoration:none}.doc h3 a:hover{text-decoration:underline}
.meta{color:var(--fg-2);font-size:13px;margin-top:2px}
.cols{display:grid;grid-template-columns:1fr 1fr;gap:16px}
@media (max-width:560px){.cols{grid-template-columns:1fr}}
.cols h4{font-size:11.5px;letter-spacing:.08em;text-transform:uppercase;color:var(--fg-3);margin:0 0 6px;font-weight:600}
.cols ul{margin:0;padding-left:18px;display:grid;gap:3px;font-size:14px}
.cols li .v{color:var(--fg-2)}
.foot{display:flex;justify-content:space-between;align-items:center;gap:12px;flex-wrap:wrap;border-top:1px dashed var(--line);padding-top:12px}
.inkline{font-size:13px;color:var(--fg-2);display:flex;align-items:center;gap:8px;flex-wrap:wrap}
.swatch{width:11px;height:11px;border-radius:50%;display:inline-block;border:1px solid var(--line-2)}
.actions{display:flex;gap:8px;align-items:center;flex-wrap:wrap}
.empty{padding:48px 20px;text-align:center;display:grid;gap:8px;justify-items:center}
.empty .big{font-family:var(--display);font-size:22px;font-weight:500}
.empty p{margin:0;color:var(--fg-2);max-width:46ch}
.previews{display:grid;gap:12px}
.previews img{width:100%;border:1px solid var(--line);border-radius:6px;background:#fff}
.settings{display:grid;grid-template-columns:200px 1fr;gap:28px;align-items:start}
@media (max-width:860px){.settings{grid-template-columns:1fr;gap:16px}}
.subnav{display:grid;gap:2px;position:sticky;top:16px}
@media (max-width:860px){.subnav{position:static;display:flex;gap:6px;overflow-x:auto;padding-bottom:4px}}
.subnav a{text-align:left;padding:8px 12px;border-radius:6px;color:var(--fg-2);font-weight:500;white-space:nowrap;text-decoration:none}
.subnav a:hover{background:var(--paper-2);color:var(--fg)}
.section{display:grid;gap:18px;scroll-margin-top:20px}
.section-head p{margin:0;color:var(--fg-2);max-width:60ch}
fieldset{border:0;padding:0;margin:0;min-width:0}
.group{padding:18px 20px;display:grid;gap:12px}
.group legend,.group .legend{font-weight:600;font-size:15px;padding:0;margin-bottom:2px}
.group .hint{font-size:13px;color:var(--fg-2);margin:-8px 0 2px}
.radio{display:grid;grid-template-columns:auto 1fr;gap:12px;align-items:start;padding:11px 14px;border:1px solid var(--line);border-radius:7px;cursor:pointer}
.radio:hover{border-color:var(--line-2);background:var(--paper-2)}
.radio:has(input:checked){border-color:var(--ink);background:var(--ink-soft)}
.radio input{appearance:none;width:18px;height:18px;margin:2px 0 0;border:2px solid var(--line-2);border-radius:50%;background:var(--paper);display:grid;place-content:center;cursor:pointer}
.radio input::before{content:"";width:8px;height:8px;border-radius:50%;background:var(--ink);transform:scale(0)}
.radio input:checked{border-color:var(--ink)}.radio input:checked::before{transform:scale(1)}
.radio .t{font-weight:500}.radio .d{font-size:13px;color:var(--fg-2);margin-top:1px}
.field{display:grid;gap:4px}
.field label{font-size:12.5px;color:var(--fg-2);font-weight:500}
.field input,.field textarea,.field select{padding:8px 10px;border:1px solid var(--line-2);border-radius:6px;background:var(--paper);font-size:14px;width:100%}
.grid2{display:grid;grid-template-columns:1fr 1fr;gap:12px}
.grid3{display:grid;grid-template-columns:2fr 1fr 1fr;gap:12px}
@media (max-width:560px){.grid2,.grid3{grid-template-columns:1fr}}
.identity{padding:16px 18px;display:grid;gap:12px;border:1px solid var(--line);border-radius:7px}
.identity:has(.default:checked){border-color:var(--ink)}
.identity-head{display:flex;justify-content:space-between;gap:10px;align-items:center;flex-wrap:wrap}
.identity-head b{font-size:16px}
details.identity summary{cursor:pointer;list-style:none}
details.identity summary::-webkit-details-marker{display:none}
.rules{display:grid;gap:8px;font-size:14px;list-style:none;margin:0;padding:0}
.rules li{display:grid;grid-template-columns:auto 1fr;gap:10px;align-items:start}
.rules svg{width:16px;height:16px;color:var(--ok);margin-top:3px}
.sigbox{display:grid;gap:14px}
.sigpreview{min-height:80px;border:1px dashed var(--line-2);border-radius:6px;display:grid;place-items:center;padding:12px;background:#fff}
.sigpreview img{max-height:90px;max-width:100%}
canvas.pad{width:100%;height:180px;border:1px solid var(--line-2);border-radius:6px;background:#fff;touch-action:none}
.steps .step{display:grid;grid-template-columns:44px 1fr;gap:14px;padding:16px 20px;border-top:1px solid var(--line)}
.steps .step:first-child{border-top:0}
.step .n{font-family:var(--display);font-size:24px;font-weight:600;color:var(--ink);line-height:1.1}
.step b{display:block;font-weight:600;margin-bottom:2px}.step p{margin:0;color:var(--fg-2);font-size:14px}
/* landing */
.land{max-width:960px;margin:0 auto;padding:24px 20px 80px}
.land-head{display:flex;justify-content:space-between;align-items:center;gap:16px;padding:8px 0 40px}
.land-head .wordmark{color:var(--fg)}.land-head .wordmark em{color:var(--ink)}
.hero{display:grid;gap:18px;padding:32px 0 48px;max-width:640px}
.hero h1{font-size:clamp(34px,6vw,56px);line-height:1.05}
.hero p{font-size:18px;color:var(--fg-2);margin:0;max-width:52ch}
.hero .how{font-family:var(--mono);font-size:14px;color:var(--fg-2);display:grid;gap:4px;padding:16px 18px;background:var(--paper-2);border-radius:8px;border:1px solid var(--line)}
.hero .how b{color:var(--ink);font-weight:500}
.feat{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
@media (max-width:700px){.feat{grid-template-columns:1fr}}
.feat div{padding:18px;border:1px solid var(--line);border-radius:8px}
.feat b{display:block;font-family:var(--display);font-size:19px;font-weight:500;margin-bottom:4px}
.feat p{margin:0;color:var(--fg-2);font-size:14px}
.auth{max-width:420px;margin:0 auto;padding:40px 20px;display:grid;gap:20px}
.auth .card{padding:24px;display:grid;gap:14px}