:root{--ground:#fafaf7;--surface:#fff;--ink:#111;--on-ink:#fff;--body:#3a3a36;--muted:#5e5e59;--divider:#d6d6cf;--control:#86867f;--accent:#107460;--tint:#a9c9c0;--success:#427a4f;--warning:#b25143;--dark-ground:#111;--dark-surface:#1a1a1a;--dark-ink:#f2f2ee;--dark-muted:#a8a8a2;--dark-divider:#333330;--dark-accent:#b5dfcf;--dark-warning:#f08878;--sans:"Instrument Sans", system-ui, sans-serif;--mono:"IBM Plex Mono", ui-monospace, monospace;--max:1200px}*,:before,:after{box-sizing:border-box}html{-webkit-text-size-adjust:100%}body{background:var(--ground);color:var(--ink);font-family:var(--sans);font-variant-numeric:tabular-nums;-webkit-font-smoothing:antialiased;margin:0;font-size:17px;line-height:1.6}img,svg{max-width:100%}a{color:var(--ink);text-underline-offset:3px}a:hover{color:var(--accent)}:focus-visible{outline:3px solid var(--accent);outline-offset:2px}.wrap{max-width:var(--max);margin:0 auto;padding:0 24px}.mono{font-family:var(--mono)}.eyebrow{font-family:var(--mono);letter-spacing:.06em;text-transform:uppercase;color:var(--muted);margin:0;font-size:13px}.muted{color:var(--muted)}.lead{color:var(--body);max-width:600px;font-size:19px;line-height:1.6}h1,h2,h3{letter-spacing:-.02em;margin:0;font-weight:600;line-height:1.05}h1{letter-spacing:-.03em;font-size:clamp(40px,5.6vw,76px)}h2{font-size:clamp(30px,3.6vw,48px)}h3{letter-spacing:-.01em;font-size:22px;line-height:1.25}.btn{background:var(--ink);color:var(--on-ink);cursor:pointer;border:0;border-radius:8px;padding:14px 22px;font-family:inherit;font-size:16px;font-weight:600;text-decoration:none;display:inline-block}.btn:hover{color:var(--on-ink);background:#2a2a27}.btn-ghost{color:var(--ink);border:1px solid var(--ink);background:0 0}.btn-ghost:hover{background:var(--ink);color:var(--on-ink)}.link-arrow{font-weight:600;text-decoration:none}.link-arrow:after{content:" →"}section{padding:104px 0}.band{background:var(--surface);border-top:1px solid var(--divider);border-bottom:1px solid var(--divider)}.band-dark{background:var(--dark-ground);color:var(--dark-ink)}.band-dark a{color:var(--dark-ink)}.band-dark .muted,.band-dark .eyebrow{color:var(--dark-muted)}.band-dark .lead{color:#c9c9c3}.row{flex-wrap:wrap;gap:56px;display:flex}.row>*{min-width:0}.grow{flex:420px}.grid-3{grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:40px;display:grid}.grid-4{grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:24px;display:grid}.site-header{border-bottom:1px solid var(--divider);background:var(--ground);z-index:10;position:sticky;top:0}.site-header .wrap{flex-wrap:wrap;justify-content:space-between;align-items:center;gap:16px;padding-top:16px;padding-bottom:16px;display:flex}.brand{letter-spacing:-.01em;align-items:center;gap:12px;font-size:22px;font-weight:600;text-decoration:none;display:flex}.nav{flex-wrap:wrap;align-items:center;gap:8px 26px;font-size:15px;display:flex}.nav a{text-decoration:none}.nav .btn{padding:11px 16px;font-size:15px}.site-footer{border-top:1px solid var(--divider);color:var(--muted);padding:56px 0 64px;font-size:14px}.footer-grid{grid-template-columns:repeat(auto-fit,minmax(180px,1fr));gap:32px;display:grid}.footer-grid h4{color:var(--ink);margin:0 0 12px;font-size:14px}.footer-grid ul{gap:8px;margin:0;padding:0;list-style:none;display:grid}.footer-grid a{color:var(--muted);text-decoration:none}.footer-grid a:hover{color:var(--accent)}.row-card{background:var(--surface);border:2px solid var(--ink);border-radius:12px;padding:22px}.row-option{background:var(--surface);border:1px solid var(--divider);color:var(--muted);border-radius:12px;align-items:center;gap:12px;padding:16px 20px;font-size:15px;display:flex}.radio{border:2px solid var(--control);border-radius:50%;flex:none;width:18px;height:18px}.track{background:var(--tint);border-radius:5px;height:10px;margin:26px 0 22px;position:relative}.track .fill{background:var(--accent);border-radius:5px 0 0 5px;position:absolute;inset:0 auto 0 0}.track .handle{background:var(--surface);border:2px solid var(--ink);border-radius:50%;width:24px;height:24px;margin:-12px 0 0 -12px;position:absolute;top:50%}.part-label{color:var(--muted);margin:0 0 6px;font-size:13px}.select{border:1px solid var(--control);border-radius:8px;justify-content:space-between;padding:10px 12px;font-size:15px;display:flex}.amount{margin:10px 0 0;font-size:22px;font-weight:600}.figure{border-top:2px solid var(--ink);padding-top:18px}.band-dark .figure{border-top-color:var(--dark-accent)}.figure .num{letter-spacing:-.03em;font-size:clamp(40px,4.6vw,60px);font-weight:600;line-height:1}.figure p{margin:12px 0 0}.figure cite{color:var(--muted);margin-top:10px;font-size:13px;font-style:normal;display:block}.band-dark .figure cite{color:var(--dark-muted)}.ledger{background:var(--dark-ground);color:var(--dark-ink);font-family:var(--mono);border-radius:10px;padding:28px;font-size:14px;line-height:2;overflow-x:auto}.ledger .t{color:var(--dark-muted);margin-right:20px}.invoice{font-family:var(--mono);font-size:15px}.invoice .line{border-top:1px solid var(--divider);justify-content:space-between;gap:16px;padding:18px 0;display:flex}.invoice .line:first-child{border-top-color:var(--ink)}.invoice .line:last-child{border-bottom:1px solid var(--ink)}.steps .step{border-top:1px solid var(--ink);flex-wrap:wrap;gap:12px 40px;padding:28px 0;display:flex}.steps .step:last-child{border-bottom:1px solid var(--ink)}.steps .k{font-family:var(--mono);color:var(--accent);flex:0 0 130px}.steps h3{flex:300px;font-size:26px}.steps p{color:var(--body);flex:300px;margin:0}pre,.code{background:var(--dark-surface);color:var(--dark-ink);font-family:var(--mono);border-radius:10px;padding:22px;font-size:14px;line-height:1.7;overflow-x:auto}code{font-family:var(--mono);font-size:.92em}:not(pre)>code{background:#efefea;border-radius:4px;padding:2px 6px}.prose{max-width:720px;color:var(--body);font-size:18px;line-height:1.7}.prose h2{color:var(--ink);margin:48px 0 16px;font-size:30px}.prose h3{color:var(--ink);margin:32px 0 12px;font-size:22px}.prose p,.prose ul,.prose ol{margin:0 0 20px}.prose li{margin-bottom:8px}.prose table{border-collapse:collapse;width:100%;margin:0 0 24px;font-size:16px;display:block;overflow-x:auto}.prose th,.prose td{text-align:left;border-bottom:1px solid var(--divider);vertical-align:top;padding:10px 12px}.prose blockquote{border-left:3px solid var(--accent);color:var(--muted);margin:0 0 20px;padding-left:20px}.card{background:var(--surface);border:1px solid var(--divider);border-radius:12px;padding:32px}.post-card{text-decoration:none;display:block}.post-card:hover h3{color:var(--accent)}.badge{font-family:var(--mono);letter-spacing:.06em;text-transform:uppercase;color:var(--warning);background:#fbeae7;border-radius:4px;padding:3px 8px;font-size:12px;display:inline-block}form .field{gap:6px;margin-bottom:18px;display:grid}label{font-size:15px;font-weight:600}input,textarea,select{font:inherit;border:1px solid var(--control);background:var(--surface);color:var(--ink);border-radius:8px;width:100%;padding:12px 14px}textarea{resize:vertical;min-height:140px}.notice{border-radius:8px;margin-bottom:24px;padding:14px 18px}.notice.ok{color:#2f5b39;background:#e6f0e8}.notice.err{color:#8a3a2f;background:#fbeae7}details{border-top:1px solid var(--divider);padding:20px 0}details:last-child{border-bottom:1px solid var(--divider)}summary{cursor:pointer;font-size:18px;font-weight:600}details p{color:var(--body);margin:12px 0 0}@media (width<=640px){section{padding:72px 0}.nav{gap:6px 16px}}