:root{--ink:#111827;--muted:#4b5563;--line:#e5e7eb;--violet:#6d28d9;--mint:#059669;--paper:#fff;--soft:#f8f9fa}*{box-sizing:border-box}body{margin:0;background:var(--paper);color:var(--ink);font:16px/1.75 Inter,Arial,sans-serif}.article-nav{position:sticky;top:0;display:flex;align-items:center;justify-content:space-between;padding:14px max(24px,calc((100% - 800px)/2));border-bottom:1px solid var(--line);background:#ffffffed}.brand{font:700 20px "Space Grotesk",Arial,sans-serif;color:var(--ink);text-decoration:none}.article-nav>a:last-child{font-size:13px;color:var(--violet)}.article{max-width:800px;margin:0 auto;padding:24px 24px 72px}.crumb,.meta{font-size:13px;color:var(--muted)}.crumb a{color:var(--violet)}.article-head{padding:28px 0;border-bottom:1px solid var(--line)}.article-head h1{font:700 clamp(32px,5vw,46px)/1.15 "Space Grotesk",Arial,sans-serif;margin:10px 0 14px}.label{font-size:12px;letter-spacing:.12em;text-transform:uppercase;color:var(--violet);font-weight:700}.summary{background:#f4f3ff;border-left:4px solid var(--violet);padding:18px 22px;margin:24px 0;border-radius:4px}.toc{background:var(--soft);padding:20px 24px;border:1px solid var(--line);border-radius:12px;margin:26px 0}.toc ol{margin:10px 0 0;padding-left:22px}.toc a,.article a{color:var(--violet)}.article section{scroll-margin-top:80px}.article h2{font:700 26px/1.25 "Space Grotesk",Arial,sans-serif;margin:42px 0 14px;padding-top:14px;border-top:1px solid var(--line)}.cmp{width:100%;border-collapse:collapse;font-size:14px;margin:22px 0;border:1px solid var(--line)}.cmp th,.cmp td{padding:12px;text-align:left;vertical-align:top;border-bottom:1px solid var(--line)}.cmp th{background:var(--soft);font-size:12px}.article h3{font:600 19px/1.3 "Space Grotesk",Arial,sans-serif;margin:26px 0 10px}.article p{color:var(--muted);margin:0 0 16px}.article ul,.article ol{padding-left:24px;color:var(--muted);margin:0 0 18px}.article li{padding:3px 0}.method-note{font-size:13px;background:var(--soft);padding:14px 16px;border-radius:8px}.site-footer{border-top:1px solid var(--line);padding:28px 20px;text-align:center;color:var(--muted);font-size:13px}.site-footer a{color:var(--violet)}.site-footer p{margin:10px 0 0}@media(max-width:600px){.article-nav{gap:12px}.article-nav>a:last-child{font-size:12px}.article{padding:18px 20px 56px}}

.cost-tool{margin:28px 0;padding:22px;border:1px solid var(--line);border-radius:12px;background:var(--soft)}.cost-tool h2{margin:0 0 12px;padding:0;border:0}.cost-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px;margin:20px 0}.cost-grid label{display:grid;gap:6px;color:var(--ink);font-size:14px;font-weight:600}.cost-grid input{width:100%;min-height:44px;padding:10px 12px;border:1px solid #9ca3af;border-radius:7px;background:#fff;color:var(--ink);font:inherit}.cost-grid input:focus{outline:3px solid #c4b5fd;outline-offset:1px}.cost-hint,.cost-status{font-size:14px}.cost-status{font-weight:600;color:var(--ink)!important}.cost-results{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:10px;margin:18px 0}.cost-results[hidden]{display:none}.cost-results div{padding:12px 14px;border:1px solid var(--line);border-radius:8px;background:#fff}.cost-results dt{font-size:13px;color:var(--muted)}.cost-results dd{margin:4px 0 0;font-size:20px;font-weight:700;color:var(--ink)}.cost-tool .method-note{margin-top:18px}@media(max-width:600px){.cost-grid,.cost-results{grid-template-columns:1fr}}

.ab-plans{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px}.ab-plan{min-width:0;padding:16px;border:1px solid var(--line);border-radius:10px;background:var(--paper)}.ab-plan h3{margin-top:0}.ab-comparison{font-weight:700;color:var(--ink)!important;margin-top:12px!important}@media(max-width:700px){.ab-plans{grid-template-columns:1fr}}