:root{--ink:#12263a;--muted:#4a5b6b;--bg:#f2f5f7;--white:#fff;--teal:#0b6e6e;--teal-d:#084f4f;--line:#cfd8df;--err:#a31d1d}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}}
body{margin:0;font:1rem/1.6 "Segoe UI",system-ui,-apple-system,Roboto,sans-serif;color:var(--ink);background:var(--bg)}
.wrap{max-width:70rem;margin:0 auto;padding:0 1.25rem}
.narrow{max-width:44rem}
h1,h2,h3{margin:0 0 .6rem;line-height:1.15;letter-spacing:-.02em}
h1{font-size:clamp(2.2rem,5.5vw,3.6rem);font-weight:800;max-width:15ch}
h2{font-size:clamp(1.5rem,3vw,2rem);font-weight:750}
h3{font-size:1.05rem}
section{padding:3.5rem 0;border-top:1px solid var(--line)}
.hero{border-top:0}
a{color:var(--teal-d)}
:focus-visible{outline:3px solid #e0a800;outline-offset:2px}
.skip{position:absolute;left:-999px}.skip:focus{left:1rem;top:1rem;background:var(--white);padding:.5rem;z-index:9}
.site-header{background:var(--white);border-bottom:1px solid var(--line)}
.bar{display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:.5rem 1.5rem;padding-top:.8rem;padding-bottom:.8rem}
.brand{display:flex;align-items:center;gap:.6rem;font-weight:700;color:var(--ink);text-decoration:none}
.brand small{font-weight:400;color:var(--muted)}
.mark{display:grid;place-items:center;width:2.2rem;height:2.2rem;background:var(--teal);color:#fff;border-radius:.35rem;font-size:.85rem}
nav a{margin-right:1.2rem;color:var(--ink)}
.lead{font-size:1.15rem;color:var(--muted);max-width:36rem}
.btn{display:inline-block;background:var(--teal);color:#fff;border:0;border-radius:.35rem;padding:.8rem 1.4rem;font:inherit;font-weight:600;text-decoration:none;cursor:pointer}
.btn:hover{background:var(--teal-d)}.btn:disabled{opacity:.6;cursor:not-allowed}
.hero-grid{display:grid;gap:2.5rem;grid-template-columns:1.1fr .9fr;align-items:center}
.ledger{margin:0;background:var(--white);border:1px solid var(--line);border-left:6px solid var(--teal);border-radius:.25rem;padding:1rem}
.ledger figcaption{font-weight:600;margin-bottom:.6rem}
.scroll{overflow-x:auto}
table{width:100%;border-collapse:collapse;font-size:.92rem}
th,td{text-align:left;padding:.55rem .5rem;border-bottom:1px solid var(--line);white-space:nowrap}
.id{font-family:ui-monospace,Consolas,monospace;font-size:.85rem}
.chip{display:inline-block;padding:.1rem .65rem;border-radius:99px;font-size:.85rem;font-weight:600}
.new{background:#d5eeee;color:#084f4f}.quote{background:#e3eaf0;color:#12263a}.follow{background:#fdf0c2;color:#5c4300}
.steps{list-style:none;counter-reset:s;padding:0;margin:1.5rem 0 0;display:grid;gap:1.25rem;grid-template-columns:repeat(auto-fit,minmax(13rem,1fr))}
.steps li{counter-increment:s;border-top:3px solid var(--ink);padding-top:.8rem}
.steps li::before{content:counter(s) ".";font-weight:800;font-size:1.4rem;color:var(--teal)}
.steps p{margin:0;color:var(--muted)}
.caps{margin:1.5rem 0 0;display:grid;gap:0 3rem;grid-template-columns:repeat(auto-fit,minmax(18rem,1fr))}
.caps div{border-left:3px solid var(--line);padding:.2rem 0 .2rem 1rem;margin-bottom:1.2rem}
.caps dt{font-weight:700}.caps dd{margin:0;color:var(--muted)}
.demo{background:var(--white)}
.notice{background:#fdf0c2;border-left:4px solid #e0a800;padding:.8rem 1rem;margin:0 0 1.5rem}
.field{margin-bottom:1.1rem}
label{display:block;font-weight:600;margin-bottom:.25rem}
.hint{font-weight:400;color:var(--muted)}
input,select,textarea{width:100%;font:inherit;color:var(--ink);background:#fff;border:1px solid #8795a1;border-radius:.3rem;padding:.6rem .7rem}
input[aria-invalid="true"],select[aria-invalid="true"],textarea[aria-invalid="true"]{border-color:var(--err);border-width:2px}
.error{color:var(--err);margin:.25rem 0 0;font-size:.92rem;min-height:0}
.hp{position:absolute;left:-9999px}
.status{margin-top:1rem;padding:0}.status:not(:empty){padding:.8rem 1rem;border-left:4px solid var(--muted);background:var(--bg)}
.status.ok{border-color:var(--teal)}.status.bad{border-color:var(--err)}.status.warn{border-color:#e0a800}
.site-footer{background:var(--ink);color:#e6edf2;padding:2rem 0}
.site-footer p{max-width:46rem}.small{font-size:.85rem;opacity:.8}
@media (max-width:820px){.hero-grid{grid-template-columns:1fr}}