/* WattCost. Fonts: Public Sans and Source Serif Pro, both SIL Open Font License 1.1, self-hosted. */
@font-face{font-family:"Public Sans";src:url(publicsans.woff2) format("woff2");font-weight:100 900;font-style:normal;font-display:swap}
@font-face{font-family:"Public Sans";src:url(publicsans-italic.woff2) format("woff2");font-weight:100 900;font-style:italic;font-display:swap}
@font-face{font-family:"Source Serif";src:url(sourceserif-600.woff2) format("woff2");font-weight:600;font-style:normal;font-display:swap}
:root{
  --ink:#15202b;--text:#26313b;--muted:#5b6670;--faint:#8a939b;
  --line:#dde1e5;--line2:#c9ced4;--bg:#fff;--panel:#f5f5f2;--panel2:#eef0ec;
  --blue:#1d4f91;--blue-d:#163d71;--amber:#f2b33d;--amber-l:#fdf3dd;
  --up:#b42318;--down:#067647;
  --sans:"Public Sans",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
  --serif:"Source Serif",Georgia,"Times New Roman",serif;
  --mono:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;font:400 17px/1.6 var(--sans);color:var(--text);background:var(--bg);font-variant-numeric:lining-nums}
.wrap{max-width:1080px;margin:0 auto;padding:0 24px}
.measure{max-width:720px}
a{color:var(--blue);text-decoration-thickness:1px;text-underline-offset:2px}
a:hover{color:var(--blue-d);text-decoration-thickness:2px}
h1,h2,h3{color:var(--ink);font-family:var(--serif);font-weight:600;letter-spacing:-.005em}
h1{font-size:clamp(1.85rem,4vw,2.6rem);line-height:1.15;margin:8px 0 12px;max-width:26ch}
h2{font-size:1.45rem;line-height:1.25;margin:48px 0 12px}
h3{font-size:1.1rem;margin:24px 0 6px;font-family:var(--sans);font-weight:650}
p{margin:0 0 14px}
small,.small{font-size:.85rem}
.muted{color:var(--muted)}
strong,b{font-weight:650;color:var(--ink)}
.num,td,.stat b{font-variant-numeric:tabular-nums}

/* header / nav */
.top{border-bottom:1px solid var(--line);background:var(--bg)}
.top .wrap{display:flex;align-items:center;gap:28px;min-height:64px;flex-wrap:wrap}
.brand{display:flex;align-items:center;gap:9px;text-decoration:none;color:var(--ink);font-size:1.2rem;letter-spacing:-.01em}
.brand:hover{color:var(--ink)}
.brand svg{width:28px;height:28px;flex:none}
.brand b{font-weight:750}.brand span{font-weight:450}
.nav{display:flex;gap:22px;font-size:.93rem;margin-left:auto;overflow-x:auto;scrollbar-width:none}
.nav::-webkit-scrollbar{display:none}
.nav a{color:var(--text);text-decoration:none;white-space:nowrap;padding:4px 0;border-bottom:2px solid transparent}
.nav a:hover,.nav a[aria-current]{color:var(--ink);border-bottom-color:var(--amber)}

/* page head */
.crumbs{font-size:.85rem;color:var(--muted);margin:28px 0 6px}
.crumbs a{color:var(--muted)}
.crumbs span{margin:0 6px;color:var(--faint)}
.dek{font-size:1.15rem;line-height:1.5;color:var(--text);max-width:62ch;margin-bottom:14px}
.meta{display:flex;flex-wrap:wrap;gap:4px 18px;font-size:.85rem;color:var(--muted);padding:10px 0 0;border-top:1px solid var(--line);margin:18px 0 0;max-width:720px}
.meta b{color:var(--text);font-weight:600}

/* two-column article */
.layout{display:grid;grid-template-columns:minmax(0,1fr) 260px;gap:56px;align-items:start}
.side{position:sticky;top:20px;font-size:.9rem;margin-top:40px}
.side h4{font:600 .75rem/1.2 var(--sans);text-transform:uppercase;letter-spacing:.06em;color:var(--muted);margin:0 0 8px}
.side ol{list-style:none;padding:0;margin:0 0 24px;border-left:2px solid var(--line)}
.side li a{display:block;padding:4px 0 4px 12px;color:var(--text);text-decoration:none}
.side li a:hover{color:var(--blue)}
.trust{background:var(--panel);padding:14px 16px;border-radius:6px}
.trust p{margin:0 0 8px}.trust p:last-child{margin:0}

/* key figures */
.stats{display:grid;grid-template-columns:repeat(4,1fr);border:1px solid var(--line);border-radius:8px;margin:28px 0 18px;overflow:hidden}
.stat{padding:14px 16px;border-right:1px solid var(--line)}
.stat:last-child{border-right:0}
.stat b{display:block;font:650 1.6rem/1.15 var(--sans);color:var(--ink);letter-spacing:-.01em}
.stat span{display:block;font-size:.8rem;color:var(--muted);margin-top:4px;line-height:1.35}
.stat.key{background:var(--amber-l)}
.lede{font-size:1.06rem}

/* calculator */
.calc{border:1px solid var(--line2);border-radius:10px;padding:20px 22px 16px;margin:32px 0;background:var(--bg)}
.calc h2{margin:0 0 4px;font-size:1.25rem}
.calc .sub{color:var(--muted);font-size:.9rem;margin:0 0 16px}
.fields{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}
.fields label{font-size:.82rem;font-weight:600;color:var(--text);display:flex;flex-direction:column;gap:6px}
.field{display:flex;align-items:stretch;border:1px solid var(--line2);border-radius:6px;background:#fff}
.field:focus-within{border-color:var(--blue);box-shadow:0 0 0 3px rgba(29,79,145,.15)}
.field input,.field select{font:500 1.1rem var(--sans);font-variant-numeric:tabular-nums;padding:10px 12px;border:0;background:transparent;width:100%;min-width:0;color:var(--ink);outline:none}
.field i{font-style:normal;color:var(--muted);font-size:.85rem;padding:0 12px;display:flex;align-items:center;background:var(--panel);border-left:1px solid var(--line);border-radius:0 6px 6px 0;white-space:nowrap}
.presets{margin:12px 0 0;display:flex;gap:8px;flex-wrap:wrap;align-items:center;font-size:.82rem;color:var(--muted)}
.presets button{font:500 .82rem var(--sans);padding:5px 10px;border-radius:5px;border:1px solid var(--line2);background:#fff;color:var(--text);cursor:pointer}
.presets button:hover{border-color:var(--blue);color:var(--blue)}
.out{display:grid;grid-template-columns:repeat(4,1fr);margin:18px 0 12px;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.out div{padding:12px 4px}
.out span{display:block;font:650 1.4rem/1.2 var(--sans);font-variant-numeric:tabular-nums;color:var(--ink)}
.out small{font-size:.8rem;color:var(--muted)}
.out .big span{font-size:1.75rem;color:var(--blue)}
.note{color:var(--muted);font-size:.85rem;line-height:1.5}

/* prose bits */
.formula{font:500 .98rem/1.5 var(--mono);background:var(--panel);color:var(--ink);padding:12px 14px;border-radius:6px;overflow-x:auto;border-left:3px solid var(--amber)}
.tips{padding-left:1.2em}.tips li{margin-bottom:12px;padding-left:4px}
.tips li strong{display:block}
.callout{border-left:3px solid var(--up);background:#fdf4f3;padding:10px 14px;font-size:.93rem;margin:16px 0;border-radius:0 6px 6px 0}
.callout b{color:var(--up)}

/* tables */
.tablewrap{overflow-x:auto;-webkit-overflow-scrolling:touch;margin:8px 0}
table.cost{border-collapse:collapse;width:100%;min-width:560px;font-size:.92rem}
.cost th,.cost td{padding:9px 10px;text-align:right;vertical-align:top;border-bottom:1px solid var(--line)}
.cost thead th{font:600 .78rem/1.3 var(--sans);color:var(--muted);text-transform:none;border-bottom:2px solid var(--ink);vertical-align:bottom}
.cost thead th small{display:block;font-weight:400;color:var(--faint)}
.cost thead th:first-child,table.states thead th:nth-child(2){text-align:left}
table.states td:first-child{color:var(--muted)}
.cost tbody th{text-align:left;font-weight:500;color:var(--ink)}
.cost tbody th small{display:block;color:var(--muted);font-weight:400}
.cost td small{color:var(--muted)}
.cost .yr{display:block;color:var(--muted);font-size:.8rem}
.cost tbody tr:hover{background:var(--panel)}
.cost tr.hl{background:var(--amber-l)}
.cost tr.us th,.cost tr.us td{font-weight:650;border-top:2px solid var(--ink)}
.cost .up{color:var(--up)}.cost .down{color:var(--down)}
table.states td,table.states th{white-space:nowrap}
.bar{display:inline-block;height:8px;background:var(--blue);opacity:.75;border-radius:1px;vertical-align:middle;margin-right:8px}

/* lists of links */
.peers{list-style:none;padding:0;margin:0;border-top:1px solid var(--line)}
.peers li{display:flex;justify-content:space-between;gap:12px;padding:8px 0;border-bottom:1px solid var(--line);font-variant-numeric:tabular-nums}
.peers li span{color:var(--muted)}
.faq details{border-bottom:1px solid var(--line);padding:12px 0}
.faq details:first-of-type{border-top:1px solid var(--line)}
.faq summary{cursor:pointer;font-weight:600;color:var(--ink);list-style:none;display:flex;justify-content:space-between;gap:16px}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";color:var(--muted);font-weight:400;font-size:1.2rem;line-height:1}
.faq details[open] summary::after{content:"−"}
.faq details p{margin:8px 0 2px}
.sources ol{padding-left:1.3em;font-size:.9rem}
.sources li{margin-bottom:6px}

/* home */
.home-hero{padding:48px 0 8px;max-width:760px}
.home-hero h1{font-size:clamp(2rem,4.6vw,3rem);max-width:none}
.search{display:flex;border:1px solid var(--line2);border-radius:8px;margin:22px 0 6px;max-width:560px}
.search:focus-within{border-color:var(--blue);box-shadow:0 0 0 3px rgba(29,79,145,.15)}
#q{flex:1;font:inherit;padding:13px 14px;border:0;background:transparent;outline:none;min-width:0}
.ratebar{display:flex;flex-wrap:wrap;gap:6px 22px;font-size:.88rem;color:var(--muted);margin:18px 0 0}
.ratebar b{color:var(--ink)}
.section-h{display:flex;justify-content:space-between;align-items:baseline;gap:16px;border-bottom:2px solid var(--ink);margin:52px 0 0;padding-bottom:8px}
.section-h h2{margin:0;font-size:1.3rem}
.section-h a{font-size:.9rem}
ul.dir{list-style:none;padding:0;margin:0;display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:0 32px}
ul.dir li{border-bottom:1px solid var(--line)}
ul.dir a{display:flex;justify-content:space-between;align-items:baseline;gap:12px;padding:14px 0;text-decoration:none;color:var(--ink)}
ul.dir a strong{font-weight:600}
ul.dir a:hover strong{color:var(--blue);text-decoration:underline}
ul.dir span{font-size:.88rem;color:var(--muted);text-align:right;font-variant-numeric:tabular-nums;white-space:nowrap}
.soonlist{list-style:none;padding:0;margin:12px 0 0;display:flex;flex-wrap:wrap;gap:8px}
.soonlist li{font-size:.85rem;color:var(--muted);border:1px dashed var(--line2);border-radius:4px;padding:3px 9px}
.grid3{display:grid;grid-template-columns:repeat(3,1fr);gap:32px;margin-top:20px}
.grid3 h3{margin-top:0;font-family:var(--serif);font-weight:600;font-size:1.1rem}
.grid3 p{font-size:.94rem;color:var(--text)}
.statelist{columns:4;column-gap:24px;list-style:none;padding:0;margin:16px 0 0;font-size:.92rem}
.statelist li{display:flex;justify-content:space-between;padding:3px 0;break-inside:avoid;font-variant-numeric:tabular-nums}
.statelist li span{color:var(--muted)}

/* product box (our kit) */
.kit{display:grid;grid-template-columns:120px 1fr;gap:20px;align-items:center;border:1px solid var(--line);border-radius:10px;padding:18px 20px;margin:40px 0;background:var(--panel)}
.kit img{width:120px;height:auto;border-radius:3px;box-shadow:0 1px 2px rgba(0,0,0,.12),0 4px 12px rgba(0,0,0,.08)}
.kit .tag{font:600 .72rem/1 var(--sans);text-transform:uppercase;letter-spacing:.07em;color:var(--muted);margin:0 0 8px}
.kit h3{margin:0 0 4px;font-family:var(--serif);font-size:1.15rem}
.kit p{margin:0 0 10px;font-size:.93rem}
.btn{display:inline-block;background:var(--ink);color:#fff;text-decoration:none;font:600 .92rem var(--sans);padding:9px 16px;border-radius:6px;border:0;cursor:pointer}
.btn:hover{background:#000;color:#fff;text-decoration:none}
.btn.ghost{background:#fff;color:var(--ink);border:1px solid var(--line2)}
.btn.ghost:hover{border-color:var(--ink)}
.embedbox{border-top:1px solid var(--line);border-bottom:1px solid var(--line);padding:16px 0;margin:40px 0;font-size:.95rem;display:flex;gap:16px;align-items:baseline;flex-wrap:wrap;justify-content:space-between}
.embedbox p{margin:0;max-width:60ch}

/* data page */
.findings{padding-left:1.1em}.findings li{margin:8px 0}
.grid2{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:0 40px}
.grid2 h2{font-size:1.1rem;margin-top:32px;font-family:var(--sans);font-weight:650}
.grid2 ol{padding-left:1.3em;font-size:.94rem;font-variant-numeric:tabular-nums}
.cite{border-top:2px solid var(--ink);margin-top:48px;padding-top:4px}
.cite .formula{white-space:normal;border-left-color:var(--blue);font-size:.88rem}
dl.facts{display:grid;grid-template-columns:max-content 1fr;gap:6px 20px;font-size:.93rem;margin:12px 0 20px}
dl.facts dt{color:var(--muted)}dl.facts dd{margin:0;color:var(--ink)}

/* footer */
footer.site{border-top:1px solid var(--line);margin-top:72px;padding:36px 0 48px;color:var(--muted);font-size:.87rem;background:var(--panel)}
.foot{display:grid;grid-template-columns:1.4fr 1fr 1fr;gap:32px}
.foot h4{font:600 .75rem/1.2 var(--sans);text-transform:uppercase;letter-spacing:.06em;color:var(--ink);margin:0 0 10px}
.foot ul{list-style:none;padding:0;margin:0}.foot li{margin:0 0 6px}
.foot a{color:var(--text)}
.foot .brand{margin-bottom:10px;font-size:1.05rem}
.fine{border-top:1px solid var(--line);margin-top:28px;padding-top:16px;font-size:.8rem}
[hidden]{display:none!important}

@media (max-width:900px){
  .layout{grid-template-columns:minmax(0,1fr);gap:0}
  .side{position:static;margin-top:8px;order:2}
  .side .toc{display:none}
  .grid3{grid-template-columns:1fr;gap:8px}
  .statelist{columns:2}
  .foot{grid-template-columns:1fr 1fr}
  .foot>div:first-child{grid-column:1/-1}
}
@media (max-width:640px){
  body{font-size:16px}
  .wrap{padding:0 16px}
  .top .wrap{gap:8px;padding-top:10px;padding-bottom:6px;min-height:0}
  .nav{margin-left:0;width:100%;gap:14px;font-size:.84rem}
  .stats{grid-template-columns:1fr 1fr}
  .stat:nth-child(2){border-right:0}
  .stat:nth-child(-n+2){border-bottom:1px solid var(--line)}
  .fields{grid-template-columns:1fr 1fr}
  .fields label:last-child{grid-column:1/-1}
  .out{grid-template-columns:1fr 1fr}
  .calc{padding:16px 14px 12px}
  .grid2{grid-template-columns:1fr}
  .kit{grid-template-columns:72px 1fr;gap:14px;padding:14px}
  .kit img{width:72px}
  ul.dir{grid-template-columns:1fr}
  .statelist{columns:2;column-gap:18px;font-size:.88rem}
}

.sheet-preview{display:block;max-width:100%;height:auto;border:1px solid var(--line);border-radius:4px}