:root{--ink:#15221e;--forest:#1d3e34;--forest-dark:#10251f;--paper:#f4f1e8;--white:#fff;--line:#cbc9bd;--accent:#bf4d26;--lime:#d5ef64;--muted:#5e6863}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--paper);color:var(--ink);font:17px/1.72 Arial,sans-serif}a{color:inherit}.site-header{height:78px;padding:0 max(24px,calc((100% - 1240px)/2));display:flex;align-items:center;gap:34px;border-bottom:1px solid var(--line);background:rgba(244,241,232,.96);position:sticky;top:0;z-index:10}.logo{display:flex;align-items:center;gap:11px;text-decoration:none;font-weight:800;margin-right:auto}.logo span{display:grid;place-items:center;width:40px;height:40px;border-radius:50%;background:var(--forest);color:#fff;font-size:12px}.site-header nav{display:flex;gap:24px}.site-header nav a{text-decoration:none;font-size:14px}.site-header .cta{padding:12px 18px;background:var(--ink);color:#fff;text-decoration:none;font-weight:700;font-size:14px}.breadcrumb{max-width:940px;margin:0 auto;padding:28px 24px 0;color:var(--muted);font-size:13px}.breadcrumb a{text-decoration:none}.article-hero{max-width:940px;margin:0 auto;padding:66px 24px 54px;border-bottom:1px solid var(--line)}.eyebrow{text-transform:uppercase;letter-spacing:.19em;font-size:12px;font-weight:800;color:var(--accent);margin:0 0 18px}.article-hero h1{font:700 clamp(42px,7vw,76px)/.98 Georgia,serif;letter-spacing:-.045em;max-width:900px;margin:0 0 28px}.lead{font:24px/1.5 Georgia,serif;max-width:800px;margin:0}.meta{display:flex;gap:22px;flex-wrap:wrap;margin-top:30px;font-size:13px;color:var(--muted)}.article-layout{max-width:1180px;margin:0 auto;padding:54px 24px 100px;display:grid;grid-template-columns:240px minmax(0,720px);gap:70px;justify-content:center}.toc{position:sticky;top:110px;align-self:start;border-top:3px solid var(--forest);padding-top:17px}.toc strong{display:block;margin-bottom:12px}.toc a{display:block;text-decoration:none;color:var(--muted);font-size:14px;line-height:1.4;padding:7px 0}.article h2{font:700 38px/1.1 Georgia,serif;margin:62px 0 18px;letter-spacing:-.025em}.article h2:first-child{margin-top:0}.article h3{font:700 25px/1.25 Georgia,serif;margin:34px 0 10px}.article p{margin:0 0 20px}.article ul,.article ol{padding-left:24px;margin:0 0 26px}.article li{margin:8px 0}.answer{background:var(--forest);color:#fff;padding:30px 34px;margin:0 0 44px}.answer strong{display:block;color:var(--lime);text-transform:uppercase;letter-spacing:.14em;font-size:12px;margin-bottom:10px}.answer p{font:23px/1.48 Georgia,serif;margin:0}.note{border-left:4px solid var(--accent);background:#ebe7dc;padding:22px 25px;margin:28px 0}.note strong{display:block;margin-bottom:6px}.checks{list-style:none!important;padding:0!important;display:grid;gap:10px}.checks li{background:#fff;padding:15px 18px;margin:0!important;border:1px solid #ddd9cd}.checks li:before{content:'✓';color:var(--forest);font-weight:900;margin-right:12px}.related{margin-top:64px;border-top:1px solid var(--line);padding-top:34px}.related h2{margin-top:0}.related-grid{display:grid;grid-template-columns:1fr 1fr;gap:12px}.related a{background:var(--forest-dark);color:#fff;text-decoration:none;padding:22px;font-weight:700}.sources{margin-top:54px;background:#e9e5d9;padding:28px}.sources h2{font-size:26px;margin:0 0 16px}.sources li{font-size:14px}.site-footer{background:var(--forest-dark);color:#fff;padding:38px max(24px,calc((100% - 1180px)/2));display:flex;justify-content:space-between;gap:24px}.site-footer p{margin:0;color:#c9d1cd}.site-footer a{color:#fff}.guide-index{max-width:1180px;margin:0 auto;padding:76px 24px 100px}.guide-index h1{font:700 clamp(46px,7vw,82px)/1 Georgia,serif;letter-spacing:-.045em;margin:0;max-width:850px}.guide-index>.lead{margin:26px 0 54px}.guide-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}.guide-card{min-height:320px;padding:28px;background:#fff;border-top:4px solid var(--accent);display:flex;flex-direction:column;text-decoration:none}.guide-card small{color:var(--muted);text-transform:uppercase;letter-spacing:.15em;font-weight:700}.guide-card h2{font:700 31px/1.08 Georgia,serif;margin:28px 0 16px}.guide-card p{color:var(--muted);margin:0}.guide-card b{margin-top:auto;padding-top:24px}.next-list{margin-top:64px;padding:34px;background:var(--forest);color:#fff}.next-list h2{font:700 34px Georgia,serif;margin:0 0 20px}.next-list ol{columns:2;gap:50px}.next-list li{margin:9px 0;color:#d9e0dc}@media(max-width:820px){body{font-size:16px}.site-header{height:auto;min-height:68px;padding:12px 18px}.site-header nav{display:none}.site-header .cta{padding:10px 12px}.article-hero{padding-top:42px}.article-layout{display:block;padding-top:32px}.toc{position:static;margin-bottom:40px}.article h2{font-size:32px}.related-grid,.guide-grid{grid-template-columns:1fr}.guide-card{min-height:250px}.next-list ol{columns:1}.site-footer{display:block}.site-footer p{margin-bottom:14px}}

/* Narrow-screen containment: retain readable content and scroll wide tables in place. */
@media screen and (max-width: 820px) {
  .site-header { gap: 10px; }
  .site-header .logo { min-width: 0; flex: 1 1 auto; }
  .site-header .cta { flex: 0 1 auto; max-width: 130px; text-align: center; overflow-wrap: anywhere; }
  .guide-grid { grid-template-columns: minmax(0, 1fr); }
  .guide-card { min-width: 0; overflow-wrap: anywhere; }
  .article-layout, .article, .article-hero { min-width: 0; }
  .article, .article-hero, .guide-index { overflow-wrap: anywhere; }
  .floor-table-wrap, .aqua-table-wrap { max-width: 100%; }
}
@media screen and (max-width: 540px) {
  .article-hero h1 { font-size: clamp(34px, 9vw, 40px); line-height: 1.08; }
  .article-hero .lead { font: 19px/1.55 Arial, sans-serif; }
}