/* Barlow and Barlow Condensed, self-hosted (SIL Open Font License, see fonts/OFL.txt). Latin subset. */
@font-face{font-family:"Barlow";font-style:normal;font-weight:400;font-display:swap;src:url(fonts/barlow-latin-400-normal.woff2) format("woff2")}
@font-face{font-family:"Barlow";font-style:normal;font-weight:600;font-display:swap;src:url(fonts/barlow-latin-600-normal.woff2) format("woff2")}
@font-face{font-family:"Barlow Condensed";font-style:normal;font-weight:600;font-display:swap;src:url(fonts/barlow-condensed-latin-600-normal.woff2) format("woff2")}
@font-face{font-family:"Barlow Condensed";font-style:normal;font-weight:700;font-display:swap;src:url(fonts/barlow-condensed-latin-700-normal.woff2) format("woff2")}
/* National Roof Guide. Slate neutrals, verdigris accent, condensed display face. */
:root{
  --bg:#eef1f3; --panel:#ffffff; --ink:#18242c; --muted:#566772; --line:#cfd8dd;
  --accent:#1f7a68; --accent-ink:#ffffff; --roof:#3d4f5a; --flag:#fff6dd; --flag-ink:#5a4406;
  --display:"Barlow Condensed","Arial Narrow",Arial,sans-serif;
  --body:"Barlow","Segoe UI",system-ui,-apple-system,sans-serif;
  color-scheme:light;
}
@media (prefers-color-scheme: dark){ :root:not([data-theme="light"]){
  --bg:#121a1f; --panel:#1b262d; --ink:#e8eef1; --muted:#9fb0ba; --line:#33434d;
  --accent:#4fc2a8; --accent-ink:#08201a; --roof:#9fb3bf; --flag:#3a3013; --flag-ink:#f1dfa4; color-scheme:dark } }
:root[data-theme="dark"]{
  --bg:#121a1f; --panel:#1b262d; --ink:#e8eef1; --muted:#9fb0ba; --line:#33434d;
  --accent:#4fc2a8; --accent-ink:#08201a; --roof:#9fb3bf; --flag:#3a3013; --flag-ink:#f1dfa4; color-scheme:dark }

*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;background:var(--bg);color:var(--ink);font-family:var(--body);font-size:17px;line-height:1.6;padding-inline:16px;padding-block:0 110px}
img{max-width:100%}
a{color:var(--accent)}
:focus-visible{outline:3px solid var(--accent);outline-offset:2px}
@media (prefers-reduced-motion: reduce){*{scroll-behavior:auto!important}}

.wrap{max-width:820px;margin:0 auto;display:flex;flex-direction:column;gap:32px}
.site-head{max-width:820px;margin:0 auto;padding-block:16px 4px;display:flex;justify-content:space-between;align-items:center;gap:12px;flex-wrap:wrap}
.brand{font-family:var(--display);font-weight:700;font-size:1.4rem;letter-spacing:.02em;color:var(--ink);text-decoration:none;display:flex;align-items:center;gap:8px}
.brand svg{width:26px;height:20px;flex:none}
.site-head nav{display:flex;gap:18px;flex-wrap:wrap;font-size:.95rem}
.site-head nav a{color:var(--muted);text-decoration:none}
.site-head nav a:hover{color:var(--accent)}

.crumbs{font-size:.9rem;color:var(--muted)}
.crumbs ol{list-style:none;margin:0;padding:0;display:flex;flex-wrap:wrap;gap:6px}
.crumbs li+li::before{content:"›";margin-right:6px}
.crumbs a{color:var(--muted)}

h1{font-family:var(--display);font-weight:700;font-size:clamp(2.1rem,6.5vw,3.1rem);line-height:1.05;margin:6px 0 0;text-wrap:balance}
h2{font-family:var(--display);font-weight:600;font-size:1.65rem;line-height:1.15;margin:0 0 10px;text-wrap:balance}
h3{margin:0 0 4px;font-size:1.08rem;line-height:1.3}
p{margin:0;max-width:66ch}
section{display:flex;flex-direction:column;gap:12px}
.lede{color:var(--muted);font-size:1.08rem}
.updated{color:var(--muted);font-size:.9rem;margin-top:6px}

.panel{background:var(--panel);border:1px solid var(--line);border-radius:6px;padding:20px;min-width:0;display:flex;flex-direction:column;gap:10px}
.eyebrow{font-family:var(--display);font-weight:600;letter-spacing:.08em;text-transform:uppercase;color:var(--muted);font-size:.9rem}
.big{font-family:var(--display);font-weight:700;font-size:clamp(2.1rem,7vw,3rem);line-height:1;color:var(--accent);font-variant-numeric:tabular-nums}

.cta{background:var(--accent);color:var(--accent-ink);border-radius:6px;padding:18px;display:flex;flex-direction:column;gap:4px}
.cta a{color:var(--accent-ink);font-family:var(--display);font-weight:700;font-size:1.6rem;letter-spacing:.02em;text-decoration:none}
.cta span{font-size:.92rem}

.scroll{overflow-x:auto}
table{border-collapse:collapse;width:100%;font-variant-numeric:tabular-nums;background:var(--panel);border:1px solid var(--line)}
th,td{padding:10px 12px;text-align:right;border-bottom:1px solid var(--line);white-space:nowrap}
th:first-child,td:first-child{text-align:left;white-space:normal}
th{font-size:.85rem;color:var(--muted);font-weight:600}
tbody tr:last-child td{border-bottom:0}
@media (max-width:600px){th,td{white-space:normal;padding:9px 8px}}
.cap{color:var(--muted);font-size:.88rem}

ul.list{margin:0;padding-left:20px;display:flex;flex-direction:column;gap:8px;max-width:66ch}
.rules{display:flex;flex-direction:column;gap:22px}
.rule{display:flex;flex-direction:column;gap:6px;border-top:2px solid var(--roof);padding-top:12px}
.cite{color:var(--muted);font-size:.86rem}
.faq{display:flex;flex-direction:column;gap:16px}
.chips{display:flex;gap:8px;flex-wrap:wrap;margin:0;padding:0;list-style:none}
.chips li{border:1px solid var(--line);background:var(--panel);border-radius:4px;padding:6px 12px}
.chips a{text-decoration:none;font-weight:500}
.chips .plain{color:var(--muted)}
.sources{color:var(--muted);font-size:.9rem;margin:0;padding-left:20px;display:flex;flex-direction:column;gap:4px}

form.calc{display:flex;flex-direction:column;gap:18px}
.row{display:flex;gap:12px;flex-wrap:wrap;align-items:end}
.field{display:flex;flex-direction:column;gap:6px;flex:1;min-width:150px}
label,.lab{font-weight:600;font-size:.95rem}
.hint{color:var(--muted);font-size:.86rem}
input[type=number],select{font:inherit;height:46px;line-height:1.2;color:var(--ink);background:var(--bg);border:1px solid var(--line);border-radius:4px;padding:10px 12px;width:100%}
input[type=range]{width:100%;accent-color:var(--accent)}
.btn{display:inline-block;font:inherit;font-weight:600;background:var(--accent);color:var(--accent-ink);border:0;border-radius:4px;padding:11px 18px;cursor:pointer;text-decoration:none}
.seg{display:flex;gap:8px;flex-wrap:wrap}
.seg label{font-weight:500;border:1px solid var(--line);border-radius:4px;padding:8px 14px;cursor:pointer;background:var(--bg);position:relative}
.seg input{position:absolute;opacity:0;inset:0;margin:0;cursor:pointer}
.seg label:has(input:checked){border-color:var(--accent);color:var(--accent);font-weight:600}
.seg label:has(input:focus-visible){outline:3px solid var(--accent);outline-offset:2px}
.pitch{display:flex;gap:16px;align-items:center;flex-wrap:wrap}
.pitch svg{width:150px;max-width:100%;flex:none}
.pitch .ctl{flex:1;min-width:160px}
.calc-grid{display:grid;grid-template-columns:minmax(0,1.1fr) minmax(0,1fr);gap:24px;align-items:start}
@media (max-width:820px){.calc-grid{grid-template-columns:minmax(0,1fr)}}
.out{position:sticky;top:16px;display:flex;flex-direction:column;gap:16px}
@media (max-width:820px){.out{position:static}}
dl{display:grid;grid-template-columns:1fr auto;gap:8px 16px;margin:0;font-variant-numeric:tabular-nums}
dt{color:var(--muted)} dd{margin:0;font-weight:600;text-align:right}
.dlrow{display:contents}
[hidden]{display:none!important}

.steps{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px;counter-reset:s;margin:0;padding:0;list-style:none}
@media (max-width:700px){.steps{grid-template-columns:minmax(0,1fr)}}
.steps li{counter-increment:s;border-top:2px solid var(--roof);padding-top:10px}
.steps li::before{content:counter(s);font-family:var(--display);font-weight:700;font-size:1.5rem;color:var(--roof);display:block;line-height:1}

.todo{background:var(--flag);color:var(--flag-ink);padding:0 4px;border-radius:3px;font-weight:600}
.legal h2{font-size:1.35rem;margin-top:8px}

.site-foot{max-width:820px;margin:40px auto 0;border-top:1px solid var(--line);padding-top:20px;display:flex;flex-direction:column;gap:12px;color:var(--muted);font-size:.88rem}
.site-foot p{max-width:78ch}
.site-foot nav{display:flex;gap:16px;flex-wrap:wrap}
.site-foot a{color:var(--muted)}

.callbar{position:fixed;left:0;right:0;bottom:0;z-index:5;background:var(--accent);color:var(--accent-ink);padding:10px 16px calc(10px + env(safe-area-inset-bottom,0px));display:flex;justify-content:center;gap:14px;align-items:baseline;flex-wrap:wrap;text-align:center}
.callbar a{color:var(--accent-ink);font-family:var(--display);font-weight:700;font-size:1.4rem;letter-spacing:.02em;text-decoration:none}
.callbar span{font-size:.92rem}