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.breadcrumb ol{display:flex;flex-wrap:wrap;list-style:none;gap:8px;padding:0;margin:0 0 30px;font-size:.76rem;color:var(--c-muted)}.breadcrumb li+li:before{content:'/';margin-inline-end:8px}.page-head{max-width:950px;margin-block:15px 35px}.page-head .eyebrow{margin-block-end:12px}.meta{font-size:.78rem;color:var(--c-muted)}.page-head .meta{margin-block-start:24px}.intro-split{display:grid;grid-template-columns:1.2fr 1fr;gap:55px;align-items:start}.intro-split img{width:100%;aspect-ratio:4/3;object-fit:cover}.prose{max-width:73ch;min-width:0;overflow-wrap:anywhere}.prose p{margin-block:0 1.3em}.prose h2{margin-block:2em .7em}.prose h3{font-size:1.35rem;margin-block:1.6em .6em}.prose li{margin-block:8px}.cover{margin-block:35px 45px}.cover img{width:100%;height:390px;object-fit:cover}.article-layout{display:grid;grid-template-columns:230px minmax(0,1fr);gap:65px}.toc{position:sticky;inset-block-start:25px;font-size:.8rem;border-block-start:3px solid var(--c-accent);padding-block-start:18px}.toc h2{font:600 .75rem/1.6 var(--font-body);text-transform:uppercase;letter-spacing:.08em;margin-block-end:13px}.toc ol{padding-inline-start:17px;margin:0}.toc li{padding-block:5px}.toc a{color:var(--c-muted);text-decoration:none}.toc a:hover{text-decoration:underline}.callout,blockquote{margin:24px 0;background:#e7eddd;padding:22px;border-inline-start:3px solid var(--c-primary)}.related-tool{margin-block-start:45px;background:#e7eddd;padding:32px}.related-tool h2{font-size:1.8rem}.figure{margin-block:30px}.figure img{width:100%}
.table-wrap{overflow:auto;margin-block:24px;max-width:100%;border-block-end:1px solid #aeb9ab}table{width:100%;border-collapse:collapse;font-size:.87rem;background:#fff}th,td{text-align:start;vertical-align:top;padding:16px 18px;border-block-end:1px solid #d8ded0;line-height:1.6}th{background:var(--c-primary);color:#fff;font-size:.75rem;letter-spacing:.03em}tbody tr:nth-child(even){background:#f0f2e9}th .sort{border:0;color:inherit;background:transparent;text-align:start;font:inherit;padding:0;min-height:28px}th[aria-sort=ascending] .sort:after{content:' ↑'}th[aria-sort=descending] .sort:after{content:' ↓'}.table-tools{display:flex;gap:15px;align-items:center;flex-wrap:wrap}.table-tools input{max-width:320px}.hint,.note{font-size:.8rem;color:var(--c-muted)}
.tool-panel{border:1px solid var(--c-primary);border-block-start:5px solid var(--c-primary);background:#fff;padding:32px;margin-block-end:45px}.fields{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:22px 35px}.field label{display:block;font-size:.87rem;font-weight:600;margin-block-end:7px}.input-unit{display:flex;border:1px solid #788b7a;min-width:0;background:#fff}.input-unit input{border:0;padding:12px 14px;min-width:0;width:100%;background:transparent;font-variant-numeric:tabular-nums;color:var(--c-text)}.input-unit:focus-within{outline:2px solid var(--c-accent);outline-offset:2px}.input-unit input:focus{outline:none}.unit{align-self:center;padding-inline:10px;white-space:nowrap;color:var(--c-muted);font:12px/1.5 Consolas,monospace}input[type=search],select{width:100%;border:1px solid #788b7a;padding:13px;background:#fff;color:var(--c-text)}.actions{margin-block:25px}.results{padding-block-start:20px;border-block-start:1px solid var(--c-soft)}.results dl{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:22px;margin:0}.result-row{padding:18px;background:#edf1e6;border-block-start:2px solid var(--c-primary);min-width:0}.result-row dt{font-size:.77rem;color:var(--c-muted)}.result-row dd{margin:5px 0 0;font:600 clamp(1.2rem,2.5vw,1.9rem)/1.3 Consolas,monospace;letter-spacing:-.04em;overflow-wrap:anywhere}.results .note{margin-block:22px 0}.calc-error{color:#922e16;font-weight:600}.calc-error:empty{display:none}.checklist{list-style:none;padding:0}.checklist li{display:flex;align-items:start;gap:15px;padding-block:14px;border-block-end:1px solid var(--c-soft)}.checklist input{flex-shrink:0;width:23px;height:23px;margin-block-start:4px;accent-color:var(--c-primary)}.checklist label{cursor:pointer}.checklist input:checked+label{text-decoration:line-through;color:var(--c-muted)}.progress{font:600 1rem/1.6 Consolas,monospace}
.faq{max-width:900px}.faq details{padding-block:19px;border-block-end:1px solid #b8c3b0}.faq summary{font-size:1rem;font-weight:600;cursor:pointer;padding-block:4px}.faq details div{padding-block:15px 0;max-width:70ch;color:var(--c-muted)}.disclosure{font-size:.85rem;color:var(--c-muted)}.disclosure h2{font-size:1.5rem;color:var(--c-text)}.link-list,.search-results{padding:0;list-style:none}.link-list li,.search-results li{padding-block:20px;border-block-end:1px solid #b8c3b0}.link-list a,.search-results a{font-family:var(--font-head);font-size:1.5rem;text-decoration:none}.link-list p,.search-results p{font-size:.9rem;color:var(--c-muted);margin-block:8px 0}.search-form{max-width:750px}.site-footer{padding-block:55px 30px;background:var(--c-primary);color:#e8ede3}.site-footer .wrap{display:grid;grid-template-columns:1.2fr .8fr 1fr;gap:35px}.footer-brand strong{font:2rem/1.1 var(--font-head);letter-spacing:-.05em}.footer-brand p{font-size:.8rem;max-width:25ch;margin-block:15px 0}.site-footer ul{list-style:none;margin:0;padding:0}.site-footer li{margin-block-end:7px}.site-footer a{color:#e8ede3;text-decoration:none;font-size:.85rem}.site-footer nav:last-of-type ul{columns:2}.footer-note,.copyright{grid-column:1/-1;font-size:.75rem;margin:0;color:#d0dacb}.footer-note{border-block-start:1px solid #567167;padding-block-start:25px}.copyright{font:11px/1.7 Consolas,monospace}
@media(min-width:1100px){.home .guides .guide-card:first-child{grid-row:span 2}.home .guides .guide-card:first-child .card-media img{aspect-ratio:5/4}.home .guides .guide-card:not(:first-child) p:not(.eyebrow):not(.meta){display:none}}
@media(max-width:1100px){.site-nav ul{gap:15px}.brand{font-size:1.5rem}.wrap{padding-inline:30px}.hero{gap:30px}.bill-strip{flex-wrap:wrap;gap:12px 18px}.bill-strip a{margin-inline-start:0}.tool-card{grid-template-columns:85px 1fr;padding:18px;gap:15px}.article-layout{gap:35px}.home .guides .guide-card:not(:first-child){display:block}.home .guides .guide-card:not(:first-child) .card-media img{aspect-ratio:16/9}.home .guides .guide-card:not(:first-child) .card-body{padding-block:20px}.home .guides .guide-card:first-child h3{font-size:1.7rem}}
@media(max-width:900px){.header-inner{min-height:78px;flex-wrap:wrap;gap:0}.nav-toggle{display:block;margin-inline-start:auto}.site-nav{display:none;width:100%;margin:0}.nav-open .site-nav{display:block}.site-nav ul{display:block;border-block-start:1px solid var(--c-soft);padding-block:10px}.site-nav a{display:block;padding-block:10px}.hero h1{font-size:3.7rem}.hero-media img{height:480px}.article-layout{grid-template-columns:1fr}.toc{position:static}.intro-split{gap:30px}.cover img{height:320px}}
@media(max-width:650px){body{font-size:16px}.wrap{padding-inline:21px}main{padding-block:24px 55px}.hero{grid-template-columns:1fr;gap:28px}.home main>section.hero{padding-block:28px}.edition{font-size:.6rem;letter-spacing:.07em;margin-block-end:25px}.hero h1{font-size:3.65rem;max-width:11ch}.hero .lead{font-size:1.05rem}.hero-points{margin-block:17px;font-size:.8rem}.cta{gap:9px}.btn,.btn-secondary,button[type=submit]{padding:12px 14px;font-size:.8rem}.hero-media img{height:290px}.hero-media:before{inset-block-start:17px;font-size:10px}.bill-strip{padding:22px;gap:11px}.bill-strip>span{width:100%;max-width:none;font-size:10px}.bill-strip strong{font-size:.78rem}.bill-strip a{width:100%;margin-block-start:7px}.grid{grid-template-columns:1fr;gap:24px}main>section{margin-block-start:45px;padding-block-start:22px}h2{font-size:1.8rem}.cat-card{grid-template-columns:92px 1fr;gap:18px;padding-block:18px}.cat-card .card-media img{aspect-ratio:1}.cat-card h3{font-size:1.4rem}.cat-card p{font-size:.8rem}.cat-card .card-body{padding-inline-end:0}.cat-card .meta,.cat-card .card-body:after{display:none}.tools{gap:0}.tool-card{grid-template-columns:80px 1fr;gap:16px;padding:20px 17px}.tool-card h3{font-size:1.35rem}.tool-card p{font-size:.8rem}.home .guides .guide-card:first-child .card-media img{aspect-ratio:16/9}.home .guides .guide-card:first-child .card-body{padding:20px}.home .guides .guide-card:not(:first-child){display:grid;grid-template-columns:90px 1fr;gap:16px}.home .guides .guide-card:not(:first-child) .card-media img{aspect-ratio:1}.home .guides .guide-card:not(:first-child) .card-body{padding-block:0 18px}.home .guides .guide-card:not(:first-child) h3{font-size:1.3rem}.home .guides .guide-card:not(:first-child) .eyebrow{font-size:.6rem}.table-wrap table{min-width:600px}th,td{padding:12px 14px}.intro-split{grid-template-columns:1fr}.intro-split img{aspect-ratio:16/9}.page-head h1{font-size:2.6rem}.breadcrumb ol{font-size:.7rem;margin-block-end:25px}.page-head .lead{font-size:1rem}.cover{margin-block:28px}.cover img{height:230px}.toc ol{columns:2;gap:20px}.toc li{break-inside:avoid}.article-layout{gap:15px}.prose h2{font-size:1.7rem}.tool-panel{padding:20px 17px}.fields{grid-template-columns:1fr;gap:18px}.results dl{grid-template-columns:1fr;gap:14px}.result-row dd{font-size:1.7rem}.related-tool{padding:24px}.site-footer .wrap{grid-template-columns:1fr 1fr;gap:30px}.footer-brand{grid-column:1/-1}.site-footer nav:last-of-type ul{columns:1}.site-footer{padding-block-start:40px}.search-results a,.link-list a{font-size:1.3rem}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}}@media print{.site-header,.site-footer,.toc,.related-tool,.cta{display:none}.wrap{max-width:none;padding:0}.article-layout{display:block}body{background:#fff;color:#000}.cover img{height:180px}.prose{max-width:none}a{color:#000}}

/* Watt & Ledger home photo rail */
.home .hero-media{min-width:0}.home .energy-photo-rail{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:11px;margin-block-start:18px}.home .energy-photo-rail figure{margin:0;min-width:0}.home .energy-photo-rail img{display:block;width:100%;height:auto;aspect-ratio:1.3;object-fit:cover;border-radius:2px}.home .energy-photo-rail figcaption{font-size:.59rem;line-height:1.25}.home .hero-media>img{aspect-ratio:1.45;object-fit:cover}
@media(max-width:650px){.home .hero-media>img{aspect-ratio:4/3}.home .energy-photo-rail{gap:8px;margin-block-start:13px}.home .energy-photo-rail img{aspect-ratio:1}.home .energy-photo-rail figcaption{font-size:.52rem}}

/* Homepage energy reading desk, November 2026. */
.home .grid.cats{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px}.home .cat-card{display:flex;flex-direction:column;gap:0;padding:0;background:var(--c-surface,#fffdf7);border:1px solid var(--line)}.home .cat-card .card-media{inline-size:100%}.home .cat-card .card-media img{inline-size:100%;aspect-ratio:4/3;object-fit:cover}.home .cat-card .card-body{padding:24px;min-inline-size:0}.home .cat-card h3{font-size:1.8rem}.home .cat-card .card-body:after{display:none}
.home .tools{gap:24px}.home .tools .tool-card{display:flex;flex-direction:column;gap:0;padding:24px;min-inline-size:0}.home .tools .tool-card .card-media img{inline-size:100%;aspect-ratio:16/10;object-fit:cover}.home .tools .tool-card .card-body{padding-block-start:22px}
@media(max-width:900px){.home .grid.cats{gap:18px}.home .cat-card .card-body{padding:19px}.home .cat-card h3{font-size:1.5rem}}
@media(max-width:650px){.home .grid.cats{grid-template-columns:minmax(0,1fr);gap:28px}.home .cat-card .card-media img{aspect-ratio:16/10}.home .cat-card h3{font-size:1.8rem}.home .cat-card .card-body{padding:24px}.home .cat-card p{font-size:.95rem}.home .guides .guide-card:not(:first-child){display:flex;flex-direction:column;gap:0}.home .guides .guide-card:not(:first-child) .card-media img{inline-size:100%;aspect-ratio:16/10}.home .guides .guide-card:not(:first-child) .card-body{padding-block:22px}.home .guides .guide-card:not(:first-child) h3{font-size:1.6rem}.home .tools .tool-card h3{font-size:1.6rem}.home .tools .tool-card p{font-size:.95rem}}