@font-face{font-family:'Public Sans';font-style:normal;font-weight:100 900;font-display:swap;src:url(/assets/fonts/PublicSans.woff2) format('woff2');unicode-range:U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD}
@font-face{font-family:'Public Sans';font-style:italic;font-weight:400;font-display:swap;src:url(/assets/fonts/PublicSans-italic.woff2) format('woff2');unicode-range:U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD}
@font-face{font-family:'Source Serif 4';font-style:normal;font-weight:600 700;font-display:swap;src:url(/assets/fonts/SourceSerif4.woff2) format('woff2');unicode-range:U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD}
/* Cover for Work — trade reference. Light by use scene (phones, daylight). */
:root{
  --paper:#ffffff;
  --surface:#f2f5f5;
  --surface-2:#e6ecec;
  --ink:#13222a;
  --ink-2:#3e5059;
  --muted:#5b6b73;
  --line:#d6dfe0;
  --accent:#0b5c6b;      /* workwear teal: links, structure */
  --accent-ink:#083f4a;
  --accent-soft:#e3f0f1;
  --hivis:#f26b1d;       /* safety stripe: marks only, never text */
  --serif:"Source Serif 4", Georgia, "Times New Roman", serif;
  --sans:"Public Sans", system-ui, -apple-system, "Segoe UI", Roboto, Arial, sans-serif;
  --measure:68ch;
  --r:10px;
  color-scheme:light;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;text-size-adjust:100%;scroll-padding-top:24px}
body{margin:0;background:var(--paper);color:var(--ink);font:400 1rem/1.6 var(--sans);font-kerning:normal;-webkit-font-smoothing:antialiased}
img{max-width:100%;height:auto;display:block}
::selection{background:#ffd9c2;color:var(--ink)}
a{color:var(--accent);text-decoration-thickness:1px;text-underline-offset:.18em}
a:hover{color:var(--accent-ink);text-decoration-thickness:2px}
:focus-visible{outline:3px solid var(--hivis);outline-offset:2px;border-radius:3px}
.wrap{max-width:1180px;margin:0 auto;padding-left:max(20px,env(safe-area-inset-left));padding-right:max(20px,env(safe-area-inset-right))}
.skip{position:absolute;left:-999px;top:8px;background:var(--ink);color:#fff;padding:8px 14px;border-radius:6px;z-index:10}
.skip:focus{left:12px}
.ico{width:1em;height:1em;vertical-align:-.12em}

/* Header */
.site-header{border-bottom:1px solid var(--line);background:var(--paper)}
.header-row{display:flex;align-items:center;justify-content:space-between;gap:16px;min-height:64px}
.brand{white-space:nowrap;display:inline-flex;align-items:center;gap:10px;color:var(--ink);text-decoration:none;font:700 1.12rem/1 var(--sans);letter-spacing:-.01em}
.brand:hover{color:var(--ink)}
.logo-mark{width:28px;height:28px;color:var(--accent);flex:none}
.main-nav{display:flex;gap:4px;flex-wrap:wrap}
.main-nav a{color:var(--ink-2);text-decoration:none;font-weight:600;font-size:.95rem;padding:8px 10px;border-radius:8px}
.main-nav a:hover{background:var(--surface);color:var(--ink)}

/* Type */
h1,h2,h3,h4{font-family:var(--serif);font-weight:700;color:var(--ink);text-wrap:balance;letter-spacing:-.01em}
h1{font-size:clamp(2rem,1.4rem + 2.6vw,3.05rem);line-height:1.1;margin:0 0 .45em}
h2{font-size:clamp(1.45rem,1.2rem + 1vw,1.85rem);line-height:1.2;margin:0}
h3{font-size:1.25rem;line-height:1.3;font-weight:600}
.lede{font-size:clamp(1.06rem,1rem + .35vw,1.2rem);line-height:1.55;color:var(--ink-2);max-width:60ch;margin:0}
.byline{color:var(--muted);font-size:.92rem;margin:1rem 0 0}
.crumbs{display:flex;flex-wrap:wrap;gap:8px;font-size:.88rem;color:var(--muted);margin-bottom:18px}
.crumbs a{color:var(--muted)}

/* Home */
.hero{padding:clamp(36px,6vw,72px) 0 clamp(28px,4vw,48px);border-bottom:1px solid var(--line)}
.hero-grid{display:grid;grid-template-columns:minmax(0,1.15fr) minmax(0,.85fr);gap:clamp(24px,4vw,56px);align-items:center}
.hero-copy h1{max-width:18ch}
.hero-copy .lede{margin-top:4px}
.trust-row{list-style:none;padding:0;margin:24px 0 0;display:flex;flex-wrap:wrap;gap:8px 22px;font-size:.92rem;color:var(--ink-2);font-weight:600}
.trust-row li{display:flex;align-items:center;gap:8px}
.trust-row li::before{content:"";width:14px;height:3px;border-radius:2px;background:var(--hivis)}
.hero-figure{margin:0;border-radius:var(--r);overflow:hidden;background:var(--surface);aspect-ratio:4/3}
.hero-figure img{width:100%;height:100%;object-fit:cover}

.section{padding-top:clamp(40px,5vw,64px)}
.section-head{display:flex;align-items:baseline;justify-content:space-between;gap:16px;margin-bottom:18px}
.more{font-weight:600;text-decoration:none;white-space:nowrap}
.trade-index{list-style:none;margin:0;padding:0;display:grid;grid-template-columns:repeat(3,minmax(0,1fr));border-top:1px solid var(--line)}
.trade-index li{position:relative;border-bottom:1px solid var(--line)}
.trade-index li:not(:nth-child(3n+1)){border-left:1px solid var(--line)}
.trade-index a{display:flex;flex-direction:column;gap:4px;padding:18px 18px 20px;text-decoration:none;height:100%;transition:background-color .15s ease}
.trade-index a:hover{background:var(--surface)}
.trade-name{font:600 1.08rem/1.3 var(--sans);color:var(--ink)}
.trade-short{font-size:.9rem;color:var(--muted);line-height:1.45}
.trade-count{position:absolute;top:19px;right:16px;font-size:.78rem;font-weight:600;color:var(--accent);font-variant-numeric:tabular-nums}

.guide-list{list-style:none;margin:0;padding:0;border-top:1px solid var(--line)}
.guide-item{border-bottom:1px solid var(--line);padding:18px 0}
.guide-link{display:block;text-decoration:none;color:inherit}
.guide-title{display:block;font:600 1.12rem/1.35 var(--sans);color:var(--ink);letter-spacing:-.005em}
.guide-link:hover .guide-title{color:var(--accent);text-decoration:underline;text-underline-offset:.18em}
.guide-desc{display:block;color:var(--ink-2);margin-top:4px;max-width:75ch;font-size:.97rem}
.guide-meta{display:block;margin-top:8px;font-size:.84rem;color:var(--muted)}
.guide-meta a{color:var(--muted)}
.empty{color:var(--muted);padding:18px 0;border-top:1px solid var(--line);margin:0}

.method{margin-top:clamp(48px,6vw,80px);background:var(--surface);border-top:1px solid var(--line);border-bottom:1px solid var(--line);padding:clamp(36px,5vw,60px) 0}
.method-grid{display:grid;grid-template-columns:minmax(0,.8fr) minmax(0,2fr);gap:clamp(20px,4vw,56px)}
.method dl{margin:0;display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:24px 36px}
.method dt{font-weight:700;margin-bottom:4px}
.method dd{margin:0;color:var(--ink-2);font-size:.97rem}

/* Page head */
.page-head{padding-top:clamp(28px,4vw,48px);padding-bottom:8px}

/* Article */
.article-head{padding-top:clamp(24px,4vw,44px)}
.article-head>*{max-width:860px}
.article-head h1{max-width:22ch}
.article-hero{margin-top:24px}
.article-hero img{border-radius:var(--r);width:100%;max-height:520px;object-fit:cover;background:var(--surface)}
.article-grid{display:grid;grid-template-columns:minmax(0,1fr) 260px;gap:56px;margin-top:28px}
.article-body{min-width:0;max-width:var(--measure)}
.quick-answer{background:var(--accent-soft);border-radius:var(--r);padding:20px 22px 22px;margin-bottom:28px;position:relative;overflow:hidden}
.quick-answer::before{content:"";position:absolute;left:0;top:0;right:0;height:4px;background:repeating-linear-gradient(-45deg,var(--hivis) 0 10px,#ffb48a 10px 20px)}
.quick-answer h2{font:700 .82rem/1.2 var(--sans);text-transform:uppercase;letter-spacing:.08em;color:var(--accent-ink);margin:4px 0 8px}
.quick-answer p{margin:0;font-size:1.1rem;line-height:1.6;color:var(--ink)}

.toc ol{margin:0;padding-left:1.2em}
.toc li{margin:.35em 0;font-size:.93rem;line-height:1.4}
.toc a{color:var(--ink-2);text-decoration:none}
.toc a:hover{color:var(--accent);text-decoration:underline}
.toc-inline{display:none;border:1px solid var(--line);border-radius:var(--r);padding:12px 16px;margin-bottom:24px}
.toc-inline summary{font-weight:700;cursor:pointer}
.toc-rail{min-width:0}
.toc-rail .toc{position:sticky;top:24px;border-top:1px solid var(--line);padding-top:14px}
.toc-title{font:700 .78rem/1 var(--sans);text-transform:uppercase;letter-spacing:.08em;color:var(--muted);margin:0 0 10px}

.prose{font-size:1.125rem;line-height:1.7}
.prose>*{margin-top:0;margin-bottom:1.1em}
.prose h2{margin-top:2em;margin-bottom:.6em;scroll-margin-top:20px}
.prose h3{margin-top:1.6em;margin-bottom:.45em}
.prose ul,.prose ol{padding-left:1.3em}
.prose li{margin:.35em 0}
.prose li::marker{color:var(--accent)}
.prose strong{font-weight:700;color:var(--ink)}
.prose figure{margin:1.6em 0}
.prose figure img{border-radius:var(--r);width:100%;background:var(--surface)}
.prose figcaption{font-size:.88rem;color:var(--muted);margin-top:8px}
.prose hr{border:0;border-top:1px solid var(--line);margin:2em 0}
.prose-page{max-width:var(--measure);padding-bottom:24px}

.table-wrap{overflow-x:auto;margin:1.5em 0;border:1px solid var(--line);border-radius:var(--r);-webkit-overflow-scrolling:touch}
.table-wrap table{border-collapse:collapse;width:100%;min-width:520px;font-size:.97rem;line-height:1.5;font-variant-numeric:tabular-nums}
.table-wrap th,.table-wrap td{padding:11px 14px;text-align:left;vertical-align:top;border-bottom:1px solid var(--line)}
.table-wrap thead th{background:var(--ink);color:#fff;font:600 .84rem/1.3 var(--sans);letter-spacing:.02em}
.table-wrap tbody th{font-weight:600;background:var(--paper);position:sticky;left:0}
.table-wrap tbody tr:nth-child(even) td,.table-wrap tbody tr:nth-child(even) th{background:var(--surface)}
.table-wrap tbody tr:last-child>*{border-bottom:0}

.callout{background:var(--surface);border-radius:var(--r);padding:16px 20px;margin:1.6em 0;font-size:1.03rem}
.callout>p:last-child{margin-bottom:0}
.callout-example{background:#fff4ec;box-shadow:inset 0 0 0 1px #f7cdb2}
.callout-note{background:var(--accent-soft)}

.faq{margin-top:2.4em}
.faq h2{margin-bottom:.6em}
.faq details{border-top:1px solid var(--line);padding:14px 0}
.faq details:last-child{border-bottom:1px solid var(--line)}
.faq summary{font-weight:700;cursor:pointer;font-size:1.05rem;list-style-position:outside}
.faq details p{margin:.6em 0 0;color:var(--ink-2);font-size:1.03rem}

.sources{margin-top:2.4em;font-size:.95rem}
.sources h2{margin-bottom:.6em}
.sources ol{padding-left:1.4em;margin:0}
.sources li{margin:.5em 0;overflow-wrap:anywhere}
.src-pub{color:var(--muted)}
.disclaimer-box{margin-top:2.2em;padding:16px 20px;border:1px solid var(--line);border-radius:var(--r);font-size:.93rem;color:var(--ink-2)}
.disclaimer-box p{margin:0}
.how-written{font-size:.9rem;color:var(--muted);margin-top:16px}
.related{padding-top:clamp(40px,5vw,64px)}
.related h2{margin-bottom:16px}
.preview-bar{background:var(--hivis);color:#1b0d03;font-weight:700;text-align:center;padding:8px;font-size:.9rem}

/* Footer */
.site-footer{margin-top:clamp(56px,7vw,96px);background:var(--ink);color:#c9d4d7;padding:48px 0 28px}
.site-footer a{color:#e8eef0;text-decoration:none}
.site-footer a:hover{text-decoration:underline;color:#fff}
.footer-grid{display:grid;grid-template-columns:minmax(0,1.6fr) minmax(0,1fr) minmax(0,1fr);gap:32px}
.brand-footer{color:#fff}
.brand-footer .logo-mark{color:#2c8796}
.footer-about p{max-width:46ch;font-size:.93rem;margin:14px 0 0}
.footer-col h2{font:700 .78rem/1 var(--sans);text-transform:uppercase;letter-spacing:.08em;color:#8fa4aa;margin:6px 0 14px}
.footer-col ul{list-style:none;padding:0;margin:0;display:grid;gap:8px;font-size:.93rem}
.footer-legal{border-top:1px solid #2b3d45;margin-top:36px;padding-top:20px;font-size:.84rem;color:#9fb0b5}
.footer-legal p{margin:0 0 8px;max-width:95ch}

@media (max-width:1060px){
  .article-grid{grid-template-columns:minmax(0,1fr)}
  .toc-rail{display:none}
  .toc-inline{display:block}
}
@media (max-width:860px){
  .hero-grid{grid-template-columns:1fr}
  .hero-figure{aspect-ratio:16/9;order:-1}
  .trade-index{grid-template-columns:repeat(2,minmax(0,1fr))}
  .trade-index li:not(:nth-child(3n+1)){border-left:0}
  .trade-index li:nth-child(even){border-left:1px solid var(--line)}
  .method-grid{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr 1fr}
  .footer-about{grid-column:1/-1}
}
@media (max-width:560px){
  .trade-index{grid-template-columns:1fr}
  .trade-index li:nth-child(even){border-left:0}
  .method dl{grid-template-columns:1fr}
  .main-nav a{padding:8px 7px;font-size:.9rem}
  .main-nav .nav-wide{display:none}
  .header-row{min-height:58px}
  .brand span{font-size:1rem}
  .prose{font-size:1.07rem}
}
@media (prefers-reduced-motion:reduce){*{transition:none!important;scroll-behavior:auto!important}}
@media print{.site-header,.site-footer,.toc-rail,.toc-inline{display:none}}

/* Contact form */
.contact-form{display:grid;gap:16px;max-width:560px;margin-top:1.4em}
.contact-form label{display:grid;gap:6px;font-weight:600;font-size:1rem}
.contact-form input,.contact-form textarea{font:400 1rem/1.5 var(--sans);padding:11px 13px;border:1px solid #b9c6c8;border-radius:8px;background:#fff;color:var(--ink)}
.contact-form input:focus,.contact-form textarea:focus{outline:3px solid var(--hivis);outline-offset:1px;border-color:var(--accent)}
.contact-form button{justify-self:start;font:700 1rem/1 var(--sans);padding:13px 22px;border-radius:8px;border:0;background:var(--accent);color:#fff;cursor:pointer}
.contact-form button:hover{background:var(--accent-ink)}
.contact-form .hp{position:absolute;left:-9999px;width:1px;height:1px;overflow:hidden}