/* Refrigerators House — EnergyGuide-label inspired theme */
:root{
  --frost:#F2F6F8; --paper:#FFFFFF; --ink:#13212A; --muted:#566771;
  --coolant:#1D6A86; --coolant-dark:#134C61; --line:#D3DFE5; --label:#F5C518;
  --sans:"Archivo",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
  --serif:"Source Serif 4",Georgia,"Times New Roman",serif;
  --measure:68ch;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;background:var(--frost);color:var(--ink);font:400 1.125rem/1.7 var(--serif);text-rendering:optimizeLegibility}
img{max-width:100%;height:auto;display:block}
a{color:var(--coolant)}
a:hover{color:var(--coolant-dark)}
:focus-visible{outline:3px solid var(--label);outline-offset:2px}
.skip{position:absolute;left:-999px;top:0;background:var(--ink);color:#fff;padding:.5rem 1rem;z-index:10}
.skip:focus{left:0}
.wrap{max-width:1180px;margin:0 auto;padding:0 20px}
.narrow{max-width:820px}
h1,h2,h3,h4{font-family:var(--sans);line-height:1.15;color:var(--ink);font-weight:750;letter-spacing:-.01em}

/* header */
.site-head{background:var(--ink);color:#fff;border-bottom:6px solid var(--label)}
.head-row{display:flex;align-items:center;gap:24px;min-height:68px}
.brand{display:flex;align-items:center;gap:10px;color:inherit;text-decoration:none;font:800 1.2rem/1 var(--sans);font-stretch:85%}
.logo-mark{width:22px;height:28px;color:var(--label)}
.site-nav{margin-left:auto}
.site-nav ul{list-style:none;margin:0;padding:0;display:flex;gap:4px}
.site-nav a{display:block;padding:10px 12px;color:#DCE7EC;text-decoration:none;font:600 .95rem/1 var(--sans);border-radius:4px}
.site-nav a:hover,.site-nav a[aria-current]{color:#fff;background:rgba(255,255,255,.1)}
.nav-toggle{display:none;margin-left:auto;background:none;border:2px solid #fff;color:#fff;font:700 .9rem var(--sans);padding:6px 12px;border-radius:4px;cursor:pointer}

/* article layout */
.article-layout{display:grid;grid-template-columns:minmax(0,1fr) 280px;gap:48px;padding-top:28px;padding-bottom:64px}
.article{min-width:0}
.crumbs{font:500 .9rem var(--sans);color:var(--muted);margin:0 0 14px}
.crumbs a{color:var(--muted)}

/* the label: the one loud element */
.label{background:var(--label);border-top:10px solid var(--ink);border-bottom:3px solid var(--ink);padding:26px 28px 18px;margin:0 0 28px}
.label h1{font-size:clamp(1.9rem,4.2vw,2.9rem);font-stretch:82%;font-weight:800;margin:0 0 18px;max-width:22ch}
.label-meta{display:grid;grid-template-columns:repeat(4,auto);gap:0;margin:0;border-top:2px solid var(--ink);font-family:var(--sans)}
.label-meta div{padding:10px 16px 2px 0}
.label-meta dt{font-size:.78rem;font-weight:600;color:#4b4214}
.label-meta dd{margin:0;font-weight:700;font-size:.98rem}
.label-meta a{color:var(--ink)}
.hero-img{margin:0 0 28px}
.hero-img img{width:100%;max-height:440px;object-fit:cover}

/* prose */
.prose{max-width:var(--measure)}
.prose>*:first-child{margin-top:0}
.prose h2{font-size:1.65rem;margin:2.2em 0 .6em;padding-top:.6em;border-top:2px solid var(--ink)}
.prose h3{font-size:1.25rem;margin:1.8em 0 .5em}
.prose h4{font-size:1.05rem;margin:1.5em 0 .4em}
.prose p,.prose ul,.prose ol{margin:0 0 1.1em}
.prose li{margin:.25em 0}
.prose img{margin:1.4em 0;border:1px solid var(--line);background:#fff}
.prose blockquote{margin:1.5em 0;padding:.2em 0 .2em 1.2em;border-left:4px solid var(--coolant);color:var(--muted)}
.table-wrap{overflow-x:auto;margin:1.5em 0;border:1px solid var(--line);background:var(--paper)}
table.data{border-collapse:collapse;width:100%;font:500 .95rem/1.45 var(--sans)}
table.data th,table.data td{padding:10px 12px;border-bottom:1px solid var(--line);text-align:left;vertical-align:top}
table.data th,table.data thead td{background:var(--ink);color:#fff;font-weight:700}
table.data img{margin:0;border:0;max-width:110px}

/* notes */
.note{margin:2em 0;padding:20px 22px;background:var(--paper);border:2px solid var(--ink);border-left-width:10px;max-width:var(--measure)}
.note h3{margin:0 0 .4em;font-size:1.15rem}
.note p{margin:0}
.note-ref{border-color:var(--coolant)}

/* sidebar */
.side{position:relative}
.toc{position:sticky;top:20px;background:var(--paper);border-top:6px solid var(--ink);padding:16px 18px;font-family:var(--sans)}
.toc h2{font-size:1rem;margin:0 0 8px}
.toc ol{margin:0;padding-left:1.2em;font-size:.9rem;line-height:1.4}
.toc li{margin:.45em 0}
.toc a{color:var(--ink);text-decoration:none}
.toc a:hover{color:var(--coolant);text-decoration:underline}

/* card lists */
.card-list{list-style:none;margin:0;padding:0;display:grid;gap:0}
.card-list li{border-top:1px solid var(--line)}
.card-list a{display:block;padding:14px 0;text-decoration:none;color:inherit}
.cl-title{display:block;font:700 1.08rem/1.25 var(--sans);color:var(--ink)}
.cl-desc{display:block;margin-top:4px;font-size:.95rem;line-height:1.5;color:var(--muted)}
.card-list a:hover .cl-title{color:var(--coolant);text-decoration:underline}
.card-list.grid{grid-template-columns:repeat(auto-fill,minmax(300px,1fr));column-gap:36px}
.related{margin-top:56px;max-width:var(--measure)}
.related h2{font-size:1.4rem;border-top:6px solid var(--ink);padding-top:14px;margin:0 0 6px}

/* hubs */
.hub-label{margin-top:4px}
.hub-label h1{max-width:26ch}
.hub-intro{max-width:var(--measure);font-size:1.08rem}
.hub-intro p{margin:0 0 .7em}
.hub-count{font:700 .95rem var(--sans);margin:12px 0 0;padding-top:10px;border-top:2px solid var(--ink)}
main.wrap{padding-top:28px;padding-bottom:64px}

/* home */
.home-hero{background:var(--ink);color:#fff;padding:56px 0 60px}
.hero-grid{display:grid;grid-template-columns:minmax(0,1.3fr) minmax(0,1fr);gap:56px;align-items:center}
.home-hero h1{color:#fff;font-size:clamp(2.2rem,5vw,3.6rem);font-stretch:80%;font-weight:800;margin:0 0 18px;max-width:16ch}
.lede{font-size:1.2rem;color:#C9D7DE;max-width:44ch;margin:0 0 26px}
.btn{display:inline-block;background:var(--label);color:var(--ink);font:700 1rem var(--sans);padding:12px 18px;text-decoration:none;border-radius:3px;margin:0 8px 8px 0}
.btn:hover{background:#fff;color:var(--ink)}
.btn-quiet{background:transparent;color:#fff;box-shadow:inset 0 0 0 2px #fff}
.btn-quiet:hover{background:#fff;color:var(--ink)}
.thermo{margin:0;background:var(--label);color:var(--ink);border-top:10px solid #fff;padding:18px 22px}
.t-row{display:flex;align-items:baseline;gap:18px;padding:10px 0;border-bottom:2px solid var(--ink);font-family:var(--sans)}
.t-num{font-size:clamp(2.6rem,6vw,4rem);font-weight:800;font-stretch:75%;line-height:1;min-width:3.2ch}
.t-lab{font-weight:700;line-height:1.25}
.t-lab small{font-weight:500;font-size:.85rem}
.thermo figcaption{font:500 .92rem/1.4 var(--sans);padding-top:12px}
.thermo figcaption a{color:var(--ink);font-weight:700}
.home-sec{padding:44px 0 8px}
.sec-head{display:flex;align-items:baseline;justify-content:space-between;gap:16px;border-top:6px solid var(--ink);padding-top:14px;margin-bottom:6px;flex-wrap:wrap}
.sec-head h2{margin:0;font-size:1.6rem;font-stretch:88%}
.more{font:700 .95rem var(--sans)}
.home-about{padding-bottom:64px}

/* footer */
.site-foot{background:var(--ink);color:#B9C9D1;padding:44px 0 28px;font:400 .95rem/1.5 var(--sans)}
.site-foot a{color:#E3ECF0;text-decoration:none}
.site-foot a:hover{text-decoration:underline}
.foot-grid{display:grid;grid-template-columns:1.2fr repeat(4,1fr);gap:28px}
.foot-grid h2{font-size:1rem;margin:0 0 8px;color:#fff}
.foot-grid h2 a{color:var(--label)}
.foot-grid ul{list-style:none;margin:0;padding:0}
.foot-grid li{margin:.35em 0;font-size:.88rem}
.foot-about p{margin:12px 0 0;max-width:30ch}
.foot-legal{margin:32px 0 6px;padding-top:16px;border-top:1px solid #2E4350;display:flex;flex-wrap:wrap;gap:18px}
.foot-copy{margin:0;font-size:.85rem}

/* responsive */
@media (max-width:980px){
  .article-layout{grid-template-columns:1fr}
  .side{display:none}
  .hero-grid{grid-template-columns:1fr;gap:32px}
  .foot-grid{grid-template-columns:1fr 1fr}
}
@media (max-width:760px){
  .nav-toggle{display:block}
  .site-nav{display:none;position:absolute;left:0;right:0;top:74px;background:var(--ink);z-index:5;border-bottom:6px solid var(--label)}
  .site-head{position:relative}
  .site-nav.open{display:block}
  .site-nav ul{flex-direction:column;padding:8px 12px 14px}
  .site-nav a{padding:12px 8px;font-size:1.05rem}
  body{font-size:1.06rem}
  .label{padding:20px 18px 12px;margin-left:-20px;margin-right:-20px}
  .label-meta{grid-template-columns:1fr 1fr}
  .card-list.grid{grid-template-columns:1fr}
  .foot-grid{grid-template-columns:1fr}
  .home-hero{padding:36px 0 40px}
}
@media (prefers-reduced-motion:reduce){*{scroll-behavior:auto!important;transition:none!important}}