/* copperandconduit.com. Charcoal steel, copper for accents, safety yellow for warnings only.
   Type: Barlow Condensed (signs, headings, ratings) and IBM Plex Sans (text). */
@font-face{font-family:"Barlow Condensed";font-weight:600;font-style:normal;font-display:swap;src:url(/assets/fonts/barlow-condensed-600.woff2) format("woff2")}
@font-face{font-family:"Barlow Condensed";font-weight:700;font-style:normal;font-display:swap;src:url(/assets/fonts/barlow-condensed-700.woff2) format("woff2")}
@font-face{font-family:"Barlow Condensed";font-weight:800;font-style:normal;font-display:swap;src:url(/assets/fonts/barlow-condensed-800.woff2) format("woff2")}
@font-face{font-family:"IBM Plex Sans";font-weight:400 700;font-style:normal;font-display:swap;src:url(/assets/fonts/ibm-plex-sans-var.woff2) format("woff2")}
:root{
 --steel-900:#1F2428;--steel-800:#2A3036;--steel-700:#3A424A;--steel-500:#5E6A73;--steel-300:#B4BDC4;--steel-200:#D3D9DE;--steel-100:#E6EAED;
 --paper:#F4F6F7;--white:#fff;--ink:#14181B;--copper:#B4622D;--copper-d:#8F4A1C;--copper-l:#D98A4E;--yellow:#FFD100;
 --sign:"Barlow Condensed","Arial Narrow",Arial,sans-serif;--text:"IBM Plex Sans",system-ui,-apple-system,"Segoe UI",Arial,sans-serif;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-padding-top:1rem}
body{margin:0;background:var(--paper);color:var(--ink);font-family:var(--text);font-size:1.04rem;line-height:1.6;font-variant-numeric:tabular-nums lining-nums}
img,svg{max-width:100%;height:auto}
a{color:var(--copper-d);text-decoration-thickness:.08em;text-underline-offset:.16em}
a:hover{color:var(--ink)}
:focus-visible{outline:3px solid var(--copper);outline-offset:2px}
.wrap{max-width:70rem;margin:0 auto;padding:0 1.25rem}
.skip{position:absolute;left:-999px;top:0;background:var(--yellow);color:var(--ink);padding:.5rem .8rem;font-family:var(--sign);font-weight:700}
.skip:focus{left:.5rem;top:.5rem;z-index:5}
h1,h2,h3{font-family:var(--sign);font-weight:700;line-height:1.05;color:var(--steel-900);margin:0}
h1{font-weight:800;font-size:clamp(2.3rem,6vw,3.7rem);line-height:.98;letter-spacing:-.005em;max-width:18em}
h2{font-size:1.9rem;margin:2.8rem 0 1rem;padding-bottom:.28rem;border-bottom:2px solid var(--copper)}
h3{font-size:1.4rem;margin:1.8rem 0 .5rem}
p{margin:0 0 1rem}
.lead{font-size:1.22rem;line-height:1.5;max-width:44rem;margin:1rem 0 1.4rem}
.measure,.prose p,.specpage .wrap>p,.rules{max-width:46rem}

/* top bar */
.top{background:var(--steel-900);border-bottom:5px solid var(--copper)}
.bar{display:flex;align-items:center;justify-content:space-between;gap:1rem;flex-wrap:wrap;padding-top:.7rem;padding-bottom:.7rem}
.brand{display:inline-flex;align-items:center;gap:.55rem;color:#fff;text-decoration:none;font-family:var(--sign);font-weight:800;font-size:1.7rem;line-height:1;letter-spacing:.01em}
.brand i{font-style:normal;color:var(--copper-l)}
.brand svg{flex:none}
.top nav{display:flex;gap:1.3rem;flex-wrap:wrap}
.top nav a{color:var(--steel-100);text-decoration:none;font-family:var(--sign);font-weight:600;font-size:1.2rem;padding:.2rem 0;border-bottom:3px solid transparent}
.top nav a:hover,.top nav a[aria-current]{color:#fff;border-bottom-color:var(--copper-l)}
.top :focus-visible,.hero :focus-visible,.signup :focus-visible,.foot :focus-visible{outline-color:var(--yellow)}

/* hero */
.hero{background:var(--steel-900);color:var(--steel-100);padding:3rem 0 2.2rem}
.hero h1{color:#fff;font-size:clamp(2.7rem,8vw,5.2rem);line-height:.93;max-width:11em}
.hero .lead{color:var(--steel-200)}
.hero a{color:var(--copper-l)}
.hero .cap{font-size:.9rem;color:var(--steel-300);margin:.6rem 0 0}
.block{padding-top:.4rem;padding-bottom:1.2rem}
.block.first,.specpage{padding-top:2.4rem;padding-bottom:2.5rem}
.crumb{font-family:var(--sign);font-weight:600;font-size:1.1rem;margin:0 0 .5rem}

/* face plates */
.plate{display:block;margin:1.4rem 0;text-decoration:none}
.tiles{display:grid;grid-template-columns:repeat(auto-fill,minmax(8.2rem,1fr));gap:0;background:var(--steel-800);border:2px solid var(--steel-700)}
.tile{margin:0;background:var(--steel-800);box-shadow:0 0 0 1px var(--steel-700);padding:.9rem .4rem .7rem;text-align:center;display:flex;flex-direction:column;align-items:center;gap:.35rem}
.tile figcaption{display:flex;flex-direction:column;line-height:1.25}
.tile b{font-family:var(--sign);font-weight:700;font-size:1.4rem;color:#fff;letter-spacing:.01em}
.tile span{font-size:.78rem;color:var(--steel-300)}
.plate>figcaption{font-size:.9rem;color:var(--steel-500);margin-top:.55rem;max-width:46rem}
.plate.pair .tiles{grid-template-columns:repeat(2,minmax(0,1fr));max-width:30rem}
.herofaces .tiles{grid-template-columns:repeat(8,minmax(0,1fr))}
.herofaces:hover .tiles{border-color:var(--copper-l)}
@media (max-width:60rem){.herofaces .tiles{grid-template-columns:repeat(4,minmax(0,1fr))}}
@media (max-width:26rem){.tiles{grid-template-columns:repeat(2,minmax(0,1fr))}}

/* nameplate */
.nameplate{display:grid;grid-template-columns:2.2fr 1fr .8fr 1.1fr;margin:0 0 2rem;background:var(--white);border:2px solid var(--steel-900)}
.nameplate div{padding:.55rem .8rem;border-left:1px solid var(--steel-300)}
.nameplate div:first-child{border-left:0}
.nameplate dt{font-size:.76rem;color:var(--steel-500);line-height:1.2}
.nameplate dd{margin:.1rem 0 0;font-family:var(--sign);font-weight:600;font-size:1.2rem;line-height:1.15}
@media (max-width:46rem){.nameplate{grid-template-columns:1fr 1fr}.nameplate div:nth-child(odd){border-left:0}.nameplate div:nth-child(n+3){border-top:1px solid var(--steel-300)}.nameplate div:first-child{grid-column:1/-1;border-bottom:1px solid var(--steel-300)}.nameplate div:nth-child(2){border-left:0}.nameplate div:nth-child(3){border-left:1px solid var(--steel-300);border-top:0}.nameplate div:nth-child(4){grid-column:1/-1;border-left:0}}

/* tables */
.tw{overflow-x:auto;margin:1.2rem 0 .4rem;background:var(--white);border:1px solid var(--steel-300)}
table.spec{width:100%;border-collapse:collapse;font-size:.96rem;line-height:1.45}
table.spec caption{caption-side:top;text-align:left;padding:.6rem .8rem;font-size:.9rem;color:var(--steel-700);background:var(--white);border-bottom:1px solid var(--steel-300)}
table.spec thead th{background:var(--steel-900);color:#fff;font-family:var(--sign);font-weight:700;font-size:1.12rem;text-align:left;padding:.5rem .8rem;vertical-align:bottom;white-space:nowrap}
table.spec tbody th{font-family:var(--sign);font-weight:700;font-size:1.18rem;text-align:left;line-height:1.2;color:var(--steel-900)}
table.spec th,table.spec td{padding:.55rem .8rem;vertical-align:top;border-bottom:1px solid var(--steel-200)}
table.spec tbody tr:nth-child(even){background:var(--paper)}
table.spec tbody tr:last-child>*{border-bottom:0}
table.gauge td,table.gauge thead th:not(:first-child){text-align:center}
table.gauge td{font-family:var(--sign);font-weight:700;font-size:1.45rem;line-height:1.1;vertical-align:middle}
table.gauge tbody th{white-space:nowrap;vertical-align:middle}
table.versus tbody th,table.keytable tbody th,table.terms tbody th{width:22%}
table.series .des{font-family:var(--sign);font-weight:600;font-size:1.12rem;white-space:normal}
table.series .nt{font-size:.88rem;color:var(--steel-700);min-width:14rem}
table.series td{white-space:nowrap}
table.series td.des,table.series td.nt{white-space:normal}
table.index tbody th a{font-size:1.3rem}
.tfoot{font-size:.9rem;color:var(--steel-700);max-width:50rem;margin:.5rem 0 1.4rem}
.nb{white-space:nowrap}
sup.c{font-size:.68em;line-height:0;margin-left:.12em}
sup.c a{text-decoration:none;font-weight:600;padding:0 .08em}
sup.c a:hover{text-decoration:underline}

/* lists and notes */
.rules{padding-left:1.25rem;margin:0 0 1.2rem}
.rules li{margin:0 0 .55rem;padding-left:.2rem}
.rules li::marker{color:var(--copper);content:"\25A0  ";font-size:.7em}
.note{background:var(--white);border-left:6px solid var(--steel-700);padding:.9rem 1.1rem;margin:1rem 0;max-width:50rem}
.note h3{margin:0 0 .3rem;font-size:1.3rem}
.note p{margin:0}
.stop{background:var(--white);border:2px solid var(--steel-900);margin:2.6rem 0 1rem;max-width:50rem;position:relative;padding:1.9rem 1.2rem 1.1rem}
.stop::before{content:"";position:absolute;left:0;right:0;top:0;height:.9rem;background:repeating-linear-gradient(-45deg,var(--yellow) 0 14px,var(--steel-900) 14px 28px)}
.stop h2{margin:0 0 .4rem;border:0;padding:0;font-size:1.7rem}
.stop p{margin:0}
.next{background:var(--steel-100);padding:.9rem 1.1rem;max-width:50rem;border-left:6px solid var(--copper)}
.how{list-style:none;counter-reset:how;padding:0;margin:0;display:grid;grid-template-columns:repeat(auto-fit,minmax(15rem,1fr));gap:0;border:1px solid var(--steel-300);background:var(--white)}
.how li{counter-increment:how;padding:1rem 1.1rem;border-left:1px solid var(--steel-300);margin-left:-1px}
.how li::before{content:counter(how);font-family:var(--sign);font-weight:800;font-size:2.4rem;line-height:1;color:var(--copper)}
.how h3{margin:.2rem 0 .3rem}
.how p{margin:0;font-size:.95rem}

/* printable sheets */
.sheet{margin:2rem 0;max-width:34rem}
.sheet img{display:block;border:1px solid var(--steel-300);background:#fff}
.sheet figcaption{font-size:.9rem;color:var(--steel-700);margin-top:.5rem}
.sheet.small{max-width:20rem;margin:0}
.packgrid{display:grid;grid-template-columns:1.3fr 1fr;gap:2rem;align-items:start}
@media (max-width:46rem){.packgrid{grid-template-columns:1fr}}
.sheets{padding-left:1.4rem}
.sheets li{margin:0 0 .5rem}
.sheets b{font-family:var(--sign);font-weight:700;font-size:1.2rem;display:block;line-height:1.2}
.sheets span{font-size:.92rem;color:var(--steel-700)}

/* sources */
.sources{margin-top:3rem}
.sources ol{padding-left:1.6rem;font-size:.92rem;line-height:1.5;max-width:54rem}
.sources li{margin:0 0 .45rem;padding-left:.2rem;overflow-wrap:anywhere}
.sources li:target{background:#FFF3B8}
.sources .pub{font-weight:600}
.sources .dt{color:var(--steel-700)}

/* forms and buttons */
.btn,button{display:inline-block;background:var(--copper-l);color:var(--steel-900);font-family:var(--sign);font-weight:700;font-size:1.3rem;line-height:1.1;padding:.7rem 1.2rem;border:0;border-radius:2px;text-decoration:none;cursor:pointer}
.btn:hover,button:hover{background:#fff;color:var(--steel-900);outline:2px solid var(--steel-900);outline-offset:-2px}
.signup{background:var(--steel-900);color:var(--steel-100);border-top:5px solid var(--copper);padding:2.4rem 0;margin-top:1rem}
.signup .wrap{display:grid;grid-template-columns:1.2fr 1fr;gap:2rem;align-items:center}
@media (max-width:50rem){.signup .wrap{grid-template-columns:1fr}}
.signup h2{color:#fff;border:0;margin:0 0 .4rem;padding:0;font-size:2.1rem}
.signup p{margin:0;color:var(--steel-200);max-width:36rem}
label{display:block;font-family:var(--sign);font-weight:600;font-size:1.1rem;margin:.9rem 0 .25rem}
.signup label{margin-top:0;color:#fff}
input,textarea{width:100%;font:inherit;padding:.65rem .7rem;border:2px solid var(--steel-700);border-radius:2px;background:#fff;color:var(--ink)}
.signup .row{display:flex;gap:.5rem;flex-wrap:wrap}
.signup .row input{flex:1 1 13rem;border-color:var(--steel-300)}
.contactform{max-width:36rem}
.contactform button{margin-top:1.2rem}
.hp{position:absolute;left:-9999px;height:0;overflow:hidden}
.product{background:var(--white);border:2px solid var(--copper);padding:.8rem 1rem;margin:.4rem 0;max-width:34rem}
.product .pname{font-family:var(--sign);font-weight:700;font-size:1.25rem;margin:0}
.product .pline{font-size:.9rem;margin:.1rem 0 .6rem}

/* footer */
.foot{background:var(--steel-900);color:var(--steel-300);padding:2rem 0 2.4rem;font-size:.95rem}
.signup+.foot{border-top:1px solid var(--steel-700)}
.foot .pub{color:#fff;font-family:var(--sign);font-weight:600;font-size:1.3rem;margin:0 0 .6rem}
.foot nav{display:flex;flex-wrap:wrap;gap:.4rem 1.3rem;margin:0 0 1rem}
.foot a{color:var(--steel-100)}
.foot a:hover{color:#fff}
.fine{margin:0 0 .3rem;font-size:.86rem}

/* Narrow screens: a wide table scrolls inside its frame; keep its caption at the frame width so it reads without scrolling. */
@media (max-width:46rem){.tw{container-type:inline-size}table.spec caption{max-width:100cqw}}
@media print{
 .top,.foot,.signup,.skip,.crumb,.sheet{display:none}
 body{background:#fff;font-size:10.5pt}
 .tiles{background:#fff;border:1px solid #000}
 .tile{background:#fff;border:.5px solid #999}
 .tile b{color:#000}.tile span{color:#333}
 table.spec thead th{background:#fff;color:#000;border-bottom:2px solid #000}
 h2{break-after:avoid}.tw,.note,.stop,.tile{break-inside:avoid}
 a{color:#000;text-decoration:none}
}