/* Hilti Firestop Library — HTML conversion */
:root{
  --bg:#f4f5f7; --panel:#fff; --ink:#1a1d21; --dim:#5b636d; --line:#d7dbe0;
  --accent:#d2051e; --accent-soft:#fdecee; --focus:#2563eb;
  --sheet-max:1100px;
}
@media (prefers-color-scheme:dark){
  :root{ --bg:#14171a; --panel:#1c2024; --ink:#e8eaed; --dim:#9aa3ad; --line:#2f353b;
         --accent:#ff5566; --accent-soft:#2a1518; }
}
:root[data-theme="dark"]{
  --bg:#14171a; --panel:#1c2024; --ink:#e8eaed; --dim:#9aa3ad; --line:#2f353b;
  --accent:#ff5566; --accent-soft:#2a1518;
}
:root[data-theme="light"]{
  --bg:#f4f5f7; --panel:#fff; --ink:#1a1d21; --dim:#5b636d; --line:#d7dbe0;
  --accent:#d2051e; --accent-soft:#fdecee;
}

*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0; background:var(--bg); color:var(--ink);
  font:15px/1.55 -apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Arial,sans-serif;
}
a{color:inherit}
h1,h2{line-height:1.25}

/* ---------------------------------------------------------------- page view */
.bar{
  position:sticky; top:0; z-index:20; display:flex; gap:14px; align-items:center;
  padding:8px 14px; background:var(--panel); border-bottom:1px solid var(--line);
}
.home{
  flex:none; width:34px; height:34px; display:grid; place-items:center;
  border:1px solid var(--line); border-radius:8px; text-decoration:none; font-size:16px;
}
.home:hover{background:var(--accent-soft); border-color:var(--accent)}
.crumb{
  flex:1; min-width:0; color:var(--dim); font-size:13px;
  white-space:nowrap; overflow:hidden; text-overflow:ellipsis;
}
.crumb span:last-child{color:var(--ink); font-weight:600}
.crumb i{opacity:.45; font-style:normal; padding:0 5px}
.pager{flex:none; display:flex; align-items:center; gap:6px}
.nav{
  width:34px; height:34px; display:grid; place-items:center; text-decoration:none;
  border:1px solid var(--line); border-radius:8px; font-size:20px; line-height:1;
}
.nav:hover{background:var(--accent-soft); border-color:var(--accent)}
.nav.off{opacity:.3}
.pno{font-variant-numeric:tabular-nums; color:var(--dim); font-size:13px; white-space:nowrap}
.pno input{
  width:4.2em; padding:4px 6px; text-align:right; font:inherit;
  font-variant-numeric:tabular-nums; color:var(--ink);
  background:var(--bg); border:1px solid var(--line); border-radius:6px;
}

main{max-width:var(--sheet-max); margin:0 auto; padding:18px 14px 40px}
.sheet{margin:0; background:#fff; border:1px solid var(--line); border-radius:6px;
  box-shadow:0 2px 14px rgba(0,0,0,.10); overflow:hidden}
.sheet img{display:block; width:100%; height:auto}

.text{margin:22px 0 0; background:var(--panel); border:1px solid var(--line); border-radius:8px; padding:14px 16px}
.text h2{margin:0 0 8px; font-size:12px; letter-spacing:.09em; text-transform:uppercase; color:var(--dim)}
.text pre{
  margin:0; white-space:pre-wrap; word-wrap:break-word; font:13px/1.5 ui-monospace,
  SFMono-Regular,Consolas,"Liberation Mono",monospace;
}
.text.empty p{margin:0; color:var(--dim); font-size:13.5px}

.foot{
  max-width:var(--sheet-max); margin:0 auto; padding:0 14px 30px;
  display:flex; flex-wrap:wrap; gap:6px 18px; justify-content:space-between;
  color:var(--dim); font-size:12px;
}

/* -------------------------------------------------------------- index view */
.head{background:var(--panel); padding:24px 20px 14px}
.head h1{margin:0; font-size:22px; letter-spacing:-.01em}
.head h1::before{content:""; display:inline-block; width:4px; height:20px; margin-right:10px;
  vertical-align:-3px; background:var(--accent); border-radius:2px}
.sub{margin:5px 0 0 14px; color:var(--dim); font-size:13px}

/* Only the search and the section chips stay pinned; the title scrolls away so a
   35000px contents list is not read through a quarter-height header. */
.stickybar{
  position:sticky; top:0; z-index:30; background:var(--panel);
  border-bottom:1px solid var(--line); padding:10px 20px 9px;
  box-shadow:0 1px 8px rgba(0,0,0,.07);
}
.searchbox{display:flex; gap:10px; align-items:center; margin-left:14px}
.searchbox input{
  flex:1; max-width:640px; padding:10px 13px; font:inherit; color:var(--ink);
  background:var(--bg); border:1px solid var(--line); border-radius:9px;
}
.searchbox input:focus{outline:2px solid var(--focus); outline-offset:1px; border-color:transparent}
#qinfo{color:var(--dim); font-size:12.5px; white-space:nowrap}

.cols{max-width:1180px; margin:0 auto; padding:18px 20px 60px}
.toolbar{display:flex; align-items:baseline; gap:12px; margin:0 0 10px}
.toolbar h2{margin:0; font-size:12px; letter-spacing:.09em; text-transform:uppercase; color:var(--dim)}
.toolbar button{
  font:inherit; font-size:12px; color:var(--dim); background:none;
  border:1px solid var(--line); border-radius:6px; padding:3px 9px; cursor:pointer;
}
.toolbar button:hover{color:var(--ink); border-color:var(--accent)}

/* section jump bar */
.secnav{display:flex; flex-wrap:wrap; gap:5px; margin:8px 0 0 14px}
.secnav a{
  font-size:11.5px; color:var(--dim); text-decoration:none; padding:3px 9px;
  border:1px solid var(--line); border-radius:99px; background:var(--bg);
  max-width:230px; overflow:hidden; text-overflow:ellipsis; white-space:nowrap;
}
.secnav a:hover{color:var(--ink); border-color:var(--accent); background:var(--accent-soft)}
.secnav a.apx{border-color:var(--accent); color:var(--accent)}
.apxleaves{grid-template-columns:repeat(auto-fill,minmax(330px,1fr))}
.apxleaves a{font-size:13.5px}

.hint{color:var(--dim); font-size:11.5px; margin-left:auto}

.key{
  margin:0 0 22px; padding:11px 14px; font-size:12.5px; line-height:1.6;
  color:var(--dim); background:var(--panel);
  border:1px solid var(--line); border-left:3px solid var(--accent); border-radius:7px;
}
.key b{color:var(--ink); font-weight:600}
.key i{font-style:italic}

/* top-level section; --bar is the pinned bar's height, measured in app.js */
.sec{margin:0 0 30px; scroll-margin-top:calc(var(--bar,92px) + 10px)}
.sec>h2{
  display:flex; align-items:baseline; gap:12px; margin:0 0 10px;
  padding:7px 0; border-bottom:2px solid var(--accent); font-size:17px;
  position:sticky; top:var(--bar,92px); z-index:10; background:var(--bg);
}
.sec>h2 .sl{text-decoration:none}
.sec>h2 .sl:hover{color:var(--accent)}
.sec>h2 em{margin-left:auto; font-style:normal; font-weight:400;
  font-size:11.5px; color:var(--dim); font-variant-numeric:tabular-nums}

/* collapsible group */
.grp{margin:0 0 4px}
.grp>summary{
  display:grid; grid-template-columns:auto auto 1fr auto; align-items:baseline;
  column-gap:9px; cursor:pointer; list-style:none;
  padding:4px 8px 5px 20px; border-radius:6px; position:relative;
}
.grp>summary::-webkit-details-marker{display:none}
.grp>summary::before{
  content:"\25BE"; position:absolute; left:7px; top:4px;
  font-size:10px; color:var(--dim); transition:transform .12s;
}
.grp:not([open])>summary::before{transform:rotate(-90deg)}
.grp>summary:hover{background:var(--accent-soft)}
.grp>summary .gt{grid-area:1/1; font-weight:600; font-size:13.5px}

/* the code spelled out letter by letter, on its own line under the heading */
.grp>summary .gd{
  grid-area:2/1/auto/-1; display:flex; flex-wrap:wrap; gap:2px 6px;
  margin-top:2px; font-size:11.5px; line-height:1.45;
}
.lt{display:inline-flex; align-items:baseline; gap:5px; color:var(--dim)}
.lt+.lt::before{content:"\00b7"; color:var(--line); margin-right:1px}
.lt b{
  font:700 11px/1.35 ui-monospace,SFMono-Regular,Consolas,monospace;
  color:var(--accent); background:var(--accent-soft);
  border:1px solid var(--line); border-radius:4px; padding:0 4px;
}
.lt .lm{min-width:0}
.grp>summary .gc{grid-area:1/2; font-style:normal; font-size:11px; color:var(--dim);
  font-variant-numeric:tabular-nums}
.grp>summary .gp{grid-area:1/4; font-size:11px; color:var(--dim);
  text-decoration:none; font-variant-numeric:tabular-nums}
.grp>summary .gp:hover{color:var(--accent); text-decoration:underline}
.grp>.gb{margin-left:11px; padding-left:10px; border-left:1px solid var(--line)}

.grp.d0>summary .gt{font-size:14.5px}
.grp.d2>summary .gt,.grp.d3>summary .gt{font-weight:500; color:var(--dim)}

/* sibling leaves as a scannable grid */
ul.leaves{
  list-style:none; margin:2px 0 8px; padding:0; display:grid; gap:2px 10px;
  grid-template-columns:repeat(auto-fill,minmax(215px,1fr));
}
ul.leaves a{
  display:flex; align-items:baseline; gap:8px; text-decoration:none;
  padding:3px 8px; border-radius:5px; font-size:13px;
}
ul.leaves a:hover{background:var(--accent-soft)}
ul.leaves a span{min-width:0; overflow:hidden; text-overflow:ellipsis; white-space:nowrap}
ul.leaves a em{margin-left:auto; font-style:normal; font-size:11px; color:var(--dim);
  font-variant-numeric:tabular-nums}

#results{margin-bottom:26px}
#results h2{font-size:12px; letter-spacing:.09em; text-transform:uppercase; color:var(--dim); margin:0 0 8px}
#rlist{list-style:none; margin:0; padding:0; display:grid; gap:4px}
#rlist a{
  display:grid; grid-template-columns:minmax(0,1fr) auto; gap:3px 12px;
  text-decoration:none; padding:8px 11px; border-radius:8px;
  background:var(--panel); border:1px solid var(--line);
}
#rlist a:hover{border-color:var(--accent); background:var(--accent-soft)}
#rlist .rt{grid-area:1/1; font-weight:600; font-size:13.5px;
  min-width:0; overflow:hidden; text-overflow:ellipsis; white-space:nowrap}
#rlist .rp{grid-area:1/2; color:var(--dim); font-size:11.5px; font-variant-numeric:tabular-nums}
#rlist .rx{grid-area:2/1/auto/-1; color:var(--dim); font-size:12.5px;
  min-width:0; white-space:nowrap; overflow:hidden; text-overflow:ellipsis}
mark{background:var(--accent); color:#fff; border-radius:2px; padding:0 1px}

/* ------------------------------------------------------------ appendix page */
.apxbar{display:flex; align-items:center; gap:14px}
.apxbar .home{flex:none}
.apxtitle{flex:1; min-width:0; line-height:1.3}
.apxtitle b{display:block; font-size:14px}
.apxtitle span{display:block; font-size:11.5px; color:var(--dim)}
.langs{flex:none; display:flex; gap:4px; flex-wrap:wrap}
.langs a{
  font-size:11.5px; color:var(--dim); text-decoration:none; padding:3px 9px;
  border:1px solid var(--line); border-radius:99px; white-space:nowrap;
}
.langs a:hover{color:var(--ink); border-color:var(--accent)}
.langs a.on{color:#fff; background:var(--accent); border-color:var(--accent)}

.apxhead{padding:26px 20px 16px; max-width:860px; margin:0 auto}
.kicker{margin:0; font-size:11.5px; letter-spacing:.11em; text-transform:uppercase; color:var(--accent)}
.apxhead h1{margin:6px 0 4px; font-size:26px; letter-spacing:-.015em}
.apxhead h1::before{content:none}
.apxhead .sub{margin:0 0 14px; color:var(--dim); font-size:13px}
.onthis{margin-left:0}

main.apx{max-width:860px; margin:0 auto; padding:0 20px 60px}
.applied{
  margin:0 0 26px; padding:11px 14px; font-size:12.5px; line-height:1.55; color:var(--dim);
  background:var(--panel); border:1px solid var(--line);
  border-left:3px solid var(--accent); border-radius:7px;
}
.applied b{color:var(--ink)}

main.apx .sec{margin:0 0 34px; scroll-margin-top:calc(var(--bar,80px) + 12px)}
main.apx .sec>h2{
  position:static; font-size:19px; margin:0 0 12px; padding:0 0 7px;
  border-bottom:2px solid var(--accent);
}
main.apx h3{font-size:15px; margin:22px 0 8px}
main.apx h4{font-size:12px; letter-spacing:.08em; text-transform:uppercase;
  color:var(--dim); margin:0 0 7px}
main.apx p{margin:0 0 11px}
main.apx ul,main.apx ol{margin:0 0 12px; padding-left:22px}
main.apx li{margin:0 0 5px}
main.apx li>ul{margin:6px 0 2px}

/* a provision quoted from the code */
blockquote.rule{
  margin:0 0 14px; padding:11px 15px; background:var(--panel);
  border:1px solid var(--line); border-left:3px solid var(--dim); border-radius:7px;
  font-size:13.5px; font-style:italic; color:var(--dim);
}
blockquote.rule cite{
  display:block; font-style:normal; font-weight:700; font-size:12.5px;
  color:var(--ink); margin-bottom:6px;
}
blockquote.rule p{margin:0 0 8px}
blockquote.rule p:last-child{margin:0}

.sum{margin:0 0 16px; padding:11px 15px; background:var(--accent-soft);
  border:1px solid var(--line); border-radius:7px}
.sum h4{color:var(--accent)}
.sum ul{margin:0; padding-left:20px}
.sum li:last-child{margin-bottom:0}

aside.note{
  margin:0 0 14px; padding:10px 14px; font-size:13px; line-height:1.55;
  background:var(--panel); border:1px dashed var(--line); border-radius:7px;
}

/* system-number decoder */
.decoder{margin:0 0 16px; padding:16px; background:var(--panel);
  border:1px solid var(--line); border-radius:9px}
.dcode{
  display:flex; align-items:center; justify-content:center; gap:3px;
  font:700 30px/1 ui-monospace,SFMono-Regular,Consolas,monospace; flex-wrap:wrap;
}
.dcode .dash{color:var(--dim); padding:0 3px; font-weight:400}
.dc{padding:7px 11px; border-radius:6px; color:#10141a}
.dc.a{background:#8ecae6}
.dc.b{background:#ffd08a}
.dc.c{background:#b8e0a6}
.dc.d{background:#d9c3ec}
.dlegend{list-style:none; margin:15px 0 0; padding:0;
  display:grid; grid-template-columns:repeat(auto-fit,minmax(200px,1fr)); gap:7px 16px}
.dlegend li{display:flex; align-items:baseline; gap:8px; font-size:12.5px; margin:0}
.sw{flex:none; width:12px; height:12px; border-radius:3px; display:inline-block}
.sw.a{background:#8ecae6}.sw.b{background:#ffd08a}
.sw.c{background:#b8e0a6}.sw.d{background:#d9c3ec}

/* letter / digit definition tables */
.dt{margin:0 0 16px}
.dt table{width:100%; border-collapse:collapse; font-size:13.5px}
.dt tr{border-bottom:1px solid var(--line)}
.dt tr:last-child{border-bottom:0}
.dt th{
  width:1%; white-space:nowrap; text-align:left; padding:7px 14px 7px 10px;
  font:700 13.5px/1.4 ui-monospace,SFMono-Regular,Consolas,monospace; color:var(--accent);
  vertical-align:top;
}
.dt td{padding:7px 0; vertical-align:top}

.scanfig{margin:14px 0 0}
.scanfig img,.scangrid img{
  width:100%; display:block; background:#fff;
  border:1px solid var(--line); border-radius:6px;
}
figcaption{margin-top:6px; font-size:12px; color:var(--dim)}
.scangrid{display:grid; grid-template-columns:repeat(auto-fill,minmax(230px,1fr)); gap:16px}
.scangrid figure{margin:0}
.apxfoot{max-width:860px}

@media (max-width:620px){
  .crumb{display:none}
  .apxtitle span{display:none}
  main.apx,.apxhead{padding-left:14px; padding-right:14px}
  .dcode{font-size:22px}
  .head{padding:16px 14px 10px}
  .sub,.searchbox,.secnav{margin-left:0}
  .cols{padding:14px}
  .stickybar{padding:8px 14px}
  /* one swipeable row of chips, instead of six wrapped ones eating the screen */
  .secnav{flex-wrap:nowrap; overflow-x:auto; -webkit-overflow-scrolling:touch;
    scrollbar-width:none; margin-top:7px}
  .secnav::-webkit-scrollbar{display:none}
  .secnav a{flex:none; max-width:none}
  .toolbar .hint{display:none}
}
@media print{
  .bar,.foot,.head,.toolbar{display:none}
  .sheet{border:0; box-shadow:none}
  main{max-width:none; padding:0}
}