/* Layout: one reading column with a two-pane calculator (inputs | results). Cost breakdown is set
   like a panel-door circuit directory: odd circuit numbers down the left, loads and amounts across. */
:root {
  --bg: #F2F3EF;
  --surface: #FFFFFF;
  --ink: #1B2127;
  --muted: #59626B;
  --line: #D3D8D1;
  --copper: #A9511F;
  --on-copper: #FFFFFF;
  --good: #2D6A48;
  --gas: #6F7A84;
  --display: "Anybody", "Arial Narrow", "Roboto Condensed", sans-serif;
  --body: "Hanken Grotesk", "Helvetica Neue", Arial, sans-serif;
  --mono: "JetBrains Mono", ui-monospace, "SF Mono", Menlo, Consolas, monospace;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #121619; --surface: #1A2025; --ink: #E6E9E5; --muted: #9AA3AB; --line: #2D353C;
    --copper: #E38D5C; --on-copper: #1B1209; --good: #79C39B; --gas: #8C979F; color-scheme: dark;
  }
}
:root[data-theme="dark"] {
  --bg: #121619; --surface: #1A2025; --ink: #E6E9E5; --muted: #9AA3AB; --line: #2D353C;
  --copper: #E38D5C; --on-copper: #1B1209; --good: #79C39B; --gas: #8C979F; color-scheme: dark;
}
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body { margin: 0; background: var(--bg); color: var(--ink); font: 400 17px/1.6 var(--body); -webkit-font-smoothing: antialiased; }
img, svg { max-width: 100%; }
[hidden] { display: none !important; }
a { color: var(--copper); text-underline-offset: 3px; }
a:focus-visible, button:focus-visible, input:focus-visible, select:focus-visible, textarea:focus-visible { outline: 3px solid var(--copper); outline-offset: 2px; }
.wrap { max-width: 1120px; margin: 0 auto; padding-left: max(16px, env(safe-area-inset-left, 0px)); padding-right: max(16px, env(safe-area-inset-right, 0px)); }
.narrow { max-width: 760px; }
h1, h2, h3 { font-family: var(--display); font-stretch: 75%; font-weight: 800; line-height: 1.02; text-wrap: balance; margin: 0; letter-spacing: -.005em; }
h1 { font-size: clamp(36px, 5.6vw, 60px); }
h2 { font-size: clamp(28px, 3.6vw, 38px); }
h3 { font-size: 22px; }
p { margin: 0; }
.eyebrow, .label { font: 600 12px/1.3 var(--mono); letter-spacing: .06em; text-transform: uppercase; color: var(--muted); }
.lede { font-size: 19px; max-width: 40em; color: var(--ink); }
.muted { color: var(--muted); }
.num, .tab { font-variant-numeric: tabular-nums; }
.stack { display: grid; gap: 14px; }

/* header / footer */
.site-head { border-bottom: 1px solid var(--line); background: var(--surface); }
.site-head .wrap { display: flex; justify-content: space-between; align-items: center; gap: 10px 24px; flex-wrap: wrap; padding-block: 12px; }
.logo { display: flex; align-items: center; gap: 10px; color: var(--ink); text-decoration: none; font: 800 21px/1 var(--display); font-stretch: 80%; }
.logo svg { width: 26px; height: 26px; flex: none; }
.nav { display: flex; gap: 4px 18px; flex-wrap: wrap; font-size: 15px; }
.nav a { color: var(--ink); text-decoration: none; padding: 4px 0; border-bottom: 2px solid transparent; }
.nav a:hover, .nav a[aria-current="page"] { border-bottom-color: var(--copper); }
.site-foot { margin-top: 80px; border-top: 1px solid var(--line); background: var(--surface); font-size: 14px; color: var(--muted); }
.site-foot .wrap { padding-block: 28px 36px; display: grid; gap: 18px; }
.state-links { display: grid; grid-template-columns: repeat(auto-fill, minmax(150px, 1fr)); gap: 4px 16px; font-size: 14px; }
.state-links a { color: var(--muted); text-decoration: none; }
.state-links a:hover { color: var(--copper); text-decoration: underline; }

/* page sections */
.page-head { padding-block: 44px 28px; display: grid; gap: 16px; }
.section { padding-block: 48px 0; display: grid; gap: 20px; }

/* calculator */
.calc { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); border: 1px solid var(--line); background: var(--surface); border-radius: 6px; overflow: hidden; }
.calc form { padding: 22px; display: grid; gap: 20px; border-right: 1px solid var(--line); align-content: start; }
.results { padding: 22px; display: grid; gap: 22px; align-content: start; min-width: 0; }
fieldset { border: 0; padding: 0; margin: 0; min-width: 0; display: grid; gap: 8px; }
legend { padding: 0; margin-bottom: 8px; font-weight: 700; }
.field { display: grid; gap: 6px; min-width: 0; }
.field > span:first-child { font-weight: 700; font-size: 15px; }
.hint { font-size: 13px; color: var(--muted); }
select, input[type="number"], input[type="text"], input[type="email"], input[type="tel"], textarea {
  font: inherit; font-size: 16px; color: var(--ink); background: var(--bg); border: 1px solid var(--line); border-radius: 4px; padding: 9px 10px; width: 100%; min-width: 0;
}
textarea { resize: vertical; }
.choices { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 8px; }
.choice { position: relative; display: block; }
.choice input { position: absolute; opacity: 0; inset: 0; margin: 0; cursor: pointer; }
.choice span { display: grid; gap: 2px; height: 100%; padding: 10px 12px; border: 1px solid var(--line); border-radius: 4px; font-size: 14px; line-height: 1.35; }
.choice span b { font-size: 15px; }
.choice input:checked + span { border-color: var(--copper); box-shadow: inset 0 0 0 1px var(--copper); background: color-mix(in srgb, var(--copper) 7%, var(--surface)); }
.choice input:focus-visible + span { outline: 3px solid var(--copper); outline-offset: 2px; }
.check { display: flex; gap: 10px; align-items: center; font-size: 15px; }
.check input { width: 18px; height: 18px; accent-color: var(--copper); }
input[type="range"] { width: 100%; accent-color: var(--copper); }
.range-row { display: flex; justify-content: space-between; align-items: baseline; gap: 10px; }
.range-row output { font: 600 15px var(--mono); }
.row2 { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 12px; }
.row3 { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 12px; }
details.more summary { cursor: pointer; font-weight: 700; }
details.more[open] summary { margin-bottom: 12px; }

.big { display: grid; gap: 4px; }
.big b { font: 800 clamp(48px, 7vw, 72px)/.95 var(--display); font-stretch: 85%; color: var(--copper); font-variant-numeric: tabular-nums; }
.schedule { width: 100%; border-collapse: collapse; font-size: 15px; }
.schedule caption { text-align: left; padding-bottom: 8px; }
.schedule th { font: 600 11px/1 var(--mono); letter-spacing: .06em; text-transform: uppercase; color: var(--muted); text-align: left; padding: 6px 8px; border-bottom: 2px solid var(--ink); }
.schedule td { padding: 7px 8px; border-bottom: 1px solid var(--line); vertical-align: top; }
.schedule .ckt { font: 600 13px var(--mono); color: var(--muted); width: 2.6em; }
.schedule .num, .schedule th.num { text-align: right; white-space: nowrap; }
.compare { display: grid; gap: 8px; }
.bar-row { display: grid; grid-template-columns: 5.5em minmax(0, 1fr) 4.2em; gap: 10px; align-items: center; font-size: 14px; }
.bar-track { height: 14px; background: var(--bg); border-radius: 2px; overflow: hidden; }
.bar-fill { height: 100%; background: var(--copper); border-radius: 2px; transition: width .25s ease; }
.bar-fill.gas { background: var(--gas); }
.facts { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 1px; background: var(--line); border: 1px solid var(--line); margin: 0; border-radius: 4px; overflow: hidden; }
.facts div { background: var(--surface); padding: 12px 14px; min-width: 0; }
.facts dt { font: 600 11px/1.3 var(--mono); letter-spacing: .06em; text-transform: uppercase; color: var(--muted); }
.facts dd { margin: 4px 0 0; font-weight: 700; font-size: 18px; font-variant-numeric: tabular-nums; }
.facts dd small { display: block; font-weight: 400; font-size: 13px; color: var(--muted); }
.callout { border-left: 4px solid var(--copper); background: var(--surface); padding: 16px 18px; display: grid; gap: 8px; border-radius: 0 4px 4px 0; }
.btn { display: inline-block; background: var(--copper); color: var(--on-copper); font: 700 16px/1 var(--body); padding: 13px 18px; border-radius: 4px; text-decoration: none; border: 0; cursor: pointer; }
.btn:hover { filter: brightness(1.08); }

/* tables */
.table-wrap { overflow-x: auto; border: 1px solid var(--line); border-radius: 4px; background: var(--surface); }
.data { width: 100%; border-collapse: collapse; font-size: 15px; min-width: 560px; }
.data th { font: 600 11px/1.2 var(--mono); letter-spacing: .06em; text-transform: uppercase; color: var(--muted); text-align: left; padding: 10px 12px; border-bottom: 2px solid var(--ink); white-space: nowrap; }
.data td { padding: 8px 12px; border-bottom: 1px solid var(--line); font-variant-numeric: tabular-nums; }
.data .num { text-align: right; }
.data tr:last-child td { border-bottom: 0; }
.up { color: var(--copper); }
.down { color: var(--good); }

/* charts */
.chart { width: 100%; height: auto; display: block; }
.chart text { fill: var(--muted); font: 11px var(--mono); }
.chart .bar { fill: var(--copper); }
.chart .grid { stroke: var(--line); stroke-width: 1; }
.chart .val { fill: var(--ink); font-weight: 600; }
.hbars { display: grid; gap: 8px; }
.hbar { display: grid; grid-template-columns: minmax(7em, 11em) minmax(0, 1fr) 3.5em; gap: 10px; align-items: center; font-size: 15px; }

/* FAQ */
.faq { border-top: 2px solid var(--ink); }
.faq details { border-bottom: 1px solid var(--line); }
.faq summary { cursor: pointer; padding: 14px 0; font-weight: 700; list-style: none; display: flex; justify-content: space-between; gap: 16px; }
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: "+"; font: 600 18px/1 var(--mono); color: var(--copper); }
.faq details[open] summary::after { content: "−"; }
.faq details p { padding-bottom: 16px; max-width: 46em; }

.products { display: grid; grid-template-columns: repeat(auto-fill, minmax(220px, 1fr)); gap: 12px; }
.product { background: var(--surface); border: 1px solid var(--line); border-radius: 4px; padding: 14px 16px; display: grid; gap: 6px; }
.quote-form { display: grid; gap: 14px; background: var(--surface); border: 1px solid var(--line); border-radius: 6px; padding: 22px; }
.prose { display: grid; gap: 14px; max-width: 46em; }
.prose h2 { margin-top: 18px; }
.prose ul { margin: 0; padding-left: 1.2em; display: grid; gap: 6px; }

@media (max-width: 880px) {
  .calc { grid-template-columns: minmax(0, 1fr); }
  .calc form { border-right: 0; border-bottom: 1px solid var(--line); }
  .facts { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (max-width: 480px) {
  .choices, .row3 { grid-template-columns: minmax(0, 1fr); }
  .calc form, .results { padding: 16px; }
  .hbar { grid-template-columns: minmax(0, 1fr) 3.5em; }
  .hbar .bar-track { grid-column: 1 / -1; grid-row: 2; }
}
@media (prefers-reduced-motion: reduce) { .bar-fill { transition: none; } }