:root{--ink:#1d2733;--muted:#5b6675;--line:#dbe0e6;--paper:#fbfcfd;--card:#ffffff;
--navy:#2f4f6f;--navy-dark:#223a52;--accent:#2f6f5f;--warn-bg:#fdf6ec;--warn-line:#e5c988;}
*{box-sizing:border-box}html{-webkit-text-size-adjust:100%}
body{margin:0;font-family:'Source Sans 3',system-ui,-apple-system,Segoe UI,Roboto,sans-serif;color:var(--ink);background:var(--paper);line-height:1.65}
a{color:var(--navy)}a:hover{color:var(--navy-dark)}
.wrap{max-width:900px;margin:0 auto;padding:0 20px}
.skip-link{position:absolute;left:-9999px}.skip-link:focus{left:8px;top:8px;background:#fff;padding:8px 12px;z-index:10}
.site-header{background:var(--navy);color:#fff}
.site-header .wrap{display:flex;align-items:center;justify-content:space-between;padding-top:.9rem;padding-bottom:.9rem;flex-wrap:wrap;gap:.6rem}
.brand{color:#fff;text-decoration:none;font-weight:700;font-size:1.15rem;letter-spacing:.2px}
.brand em{font-style:normal;opacity:.85;font-weight:400}
.site-nav a{color:#e8eef4;text-decoration:none;margin-left:1.1rem;font-size:.95rem}
.site-nav a:hover,.site-nav a[aria-current=page]{color:#fff;text-decoration:underline}
main{padding-block:clamp(1.8rem,4vw,3rem)}
h1,h2,h3{font-family:'Source Serif 4',Georgia,serif;line-height:1.25;color:var(--navy-dark)}
h1{font-size:clamp(1.6rem,3.4vw,2.2rem);margin:.2rem 0 .9rem}
h2{font-size:1.35rem;margin-top:2rem}
h3{font-size:1.1rem;margin-top:1.5rem}
.crumbs{font-size:.85rem;color:var(--muted);margin-bottom:1rem}
.crumbs a{color:var(--muted)}
.article p{margin:.7rem 0}
.article ul,.article ol{padding-left:1.3rem}
.article li{margin:.35rem 0}
.callout{background:var(--card);border:1px solid var(--line);border-left:4px solid var(--accent);border-radius:8px;padding:1rem 1.2rem;margin:1.4rem 0}
.callout p{margin:.4rem 0}
.callout h2,.callout h3{margin-top:.2rem}
.warn{background:var(--warn-bg);border:1px solid var(--warn-line);border-left:4px solid #b8860b;border-radius:8px;padding:1rem 1.2rem;margin:1.4rem 0}
table{border-collapse:collapse;width:100%;margin:1.2rem 0;background:var(--card);font-size:.97rem}
th,td{border:1px solid var(--line);padding:.55rem .8rem;text-align:left;vertical-align:top}
th{background:#eef2f6;font-family:'Source Sans 3',sans-serif}
.toc{background:var(--card);border:1px solid var(--line);border-radius:8px;padding:1rem 1.2rem;margin:1.2rem 0}
.toc p{margin:.3rem 0;font-size:.95rem}
.btn{display:inline-block;background:var(--navy);color:#fff !important;text-decoration:none;padding:.6rem 1.1rem;border-radius:6px;font-weight:600}
.btn:hover{background:var(--navy-dark)}
.essentials{background:var(--card);border:1px solid var(--line);border-radius:8px;padding:1rem 1.2rem;margin:1.2rem 0}
.essentials h2{margin-top:.1rem;font-size:1.15rem}
.essentials-grid{display:grid;grid-template-columns:1fr;gap:.55rem}
.ess-item{display:flex;gap:.7rem}
.ess-item .k{min-width:170px;font-weight:600;color:var(--navy-dark)}
@media(min-width:640px){.essentials-grid{grid-template-columns:1fr}.ess-item .k{min-width:200px}}
.checker-list{list-style:none;padding-left:0}
.checker-list li{background:var(--card);border:1px solid var(--line);border-radius:8px;padding:.8rem 1rem;margin:.6rem 0}
.checker-list .what{color:var(--muted);font-size:.92rem}
.review-line{font-size:.85rem;color:var(--muted);border-top:1px solid var(--line);margin-top:2rem;padding-top:.8rem}
.site-footer{background:var(--navy-dark);color:#cdd8e2;margin-top:3rem}
.site-footer .wrap{padding-top:2rem;padding-bottom:1.2rem}
.site-footer h4{color:#fff;margin:.2rem 0 .5rem;font-size:.95rem}
.site-footer ul{list-style:none;padding:0;margin:0}
.site-footer li{margin:.3rem 0}
.site-footer a{color:#cdd8e2}
.foot-legal{border-top:1px solid rgba(255,255,255,.15);margin-top:1.5rem;padding-top:1rem;font-size:.82rem;color:#a9b8c6}
.foot-cols{display:flex;gap:3rem;flex-wrap:wrap}
.saas-cta{background:var(--card);border:1px solid var(--line);border-radius:8px;padding:1rem 1.2rem;margin:1.6rem 0}
.saas-cta p{margin:.4rem 0}
@media print{.site-header,.site-footer,.saas-cta{display:none}}