/* Home Cost Pulse - one stylesheet, no framework.
   Motif: the utility bill. A meter-style readout for the headline price, receipt-style
   results, everything else quiet. */

:root {
  --paper: #F2F4F3;
  --surface: #FFFFFF;
  --ink: #1D2733;
  --ink-2: #4A5664;
  --rule: #D3D9DF;
  --field: #8E9AA6;
  --wire: #1F5FA8;
  --volt: #F4C21B;
  --low: #1D7357;
  --high: #B3261E;
  --cell: #1D2733;
  --cell-text: #FFFFFF;
  --font-body: "Public Sans", system-ui, -apple-system, "Segoe UI", Roboto, Arial, sans-serif;
  --font-display: "Barlow Condensed", "Roboto Condensed", "Arial Narrow", system-ui, sans-serif;
  color-scheme: light;
}

@media (prefers-color-scheme: dark) {
  :root {
    --paper: #151C24;
    --surface: #1C252F;
    --ink: #E5EAEF;
    --ink-2: #A7B2BD;
    --rule: #33404D;
    --field: #5D6B79;
    --wire: #86B6EE;
    --low: #5CC79F;
    --high: #F1897F;
    --cell: #2C3947;
    --cell-text: #FFFFFF;
    color-scheme: dark;
  }
}

*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 1.0625rem;
  line-height: 1.6;
  font-variant-numeric: lining-nums;
}
img, svg { max-width: 100%; }
a { color: var(--wire); text-underline-offset: 0.18em; text-decoration-thickness: 1px; }
a:hover { text-decoration-thickness: 2px; }
:focus-visible { outline: 3px solid var(--wire); outline-offset: 2px; border-radius: 2px; }

.wrap { max-width: 1120px; margin: 0 auto; padding: 0 16px; }
.skip { position: absolute; left: -9999px; }
.skip:focus { left: 16px; top: 8px; z-index: 10; background: var(--surface); padding: 0.5rem 0.75rem; }

h1, h2 { font-family: var(--font-display); font-weight: 600; line-height: 1.05; letter-spacing: -0.005em; }
h1 { font-size: clamp(2.2rem, 6vw, 3.5rem); margin: 0.2em 0 0.35em; max-width: 22ch; }
h2 { font-size: clamp(1.6rem, 3.6vw, 2.1rem); margin: 2.2rem 0 0.6rem; }
h3 { font-size: 1.08rem; margin: 1.4rem 0 0.4rem; }
p, li { max-width: 72ch; }
.lede { font-size: 1.15rem; color: var(--ink-2); margin-top: 0; }
.muted { color: var(--ink-2); }
.small { font-size: 0.9rem; }
.num { font-variant-numeric: tabular-nums; white-space: nowrap; }
.up { color: var(--high); }
.down { color: var(--low); }

/* header */
.site-header { background: #1D2733; color: #fff; }
.header-row { display: flex; align-items: center; justify-content: space-between; gap: 1rem; min-height: 60px; flex-wrap: wrap; }
.brand { display: inline-flex; align-items: center; gap: 0.55rem; color: #fff; text-decoration: none; font-family: var(--font-display); font-weight: 700; font-size: 1.45rem; letter-spacing: 0.01em; }
.brand svg { width: 30px; height: 30px; flex: none; }
.site-header nav { display: flex; gap: 1.1rem; flex-wrap: nowrap; overflow-x: auto; padding: 0.4rem 0; max-width: 100%; scrollbar-width: none; }
.site-header nav::-webkit-scrollbar { display: none; }
.site-header nav a { color: #E7ECF1; text-decoration: none; font-size: 0.98rem; white-space: nowrap; }
.nav-short { display: none; }
@media (max-width: 720px) {
  .nav-long { display: none; }
  .nav-short { display: inline; }
}
@media (max-width: 520px) {
  .header-row { min-height: 0; padding: 0.5rem 0 0.2rem; }
  .site-header nav { gap: 0.9rem; width: 100%; }
  .site-header nav a { font-size: 0.92rem; }
}
.site-header nav a:hover, .site-header nav a[aria-current="page"] { color: #fff; text-decoration: underline; text-decoration-color: var(--volt); text-decoration-thickness: 3px; }

.crumbs { font-size: 0.9rem; color: var(--ink-2); margin: 1.1rem 0 0; }
.crumbs a { color: var(--ink-2); }
.crumbs span[aria-hidden] { padding: 0 0.35rem; }

main { padding-bottom: 3rem; }

/* meter readout: the one loud element */
.meter { display: inline-flex; align-items: flex-end; flex-wrap: wrap; gap: 0.15rem 0.5rem; margin: 0.2rem 0 0.8rem; }
.meter-digits { display: inline-flex; align-items: stretch; font-family: var(--font-display); font-weight: 700; font-size: clamp(3.2rem, 11vw, 5.4rem); line-height: 1; }
.meter-digits .d {
  display: inline-block; min-width: 0.6em; text-align: center; padding: 0.07em 0.06em 0.05em;
  margin-right: 0.06em; border-radius: 4px; background: var(--cell); color: var(--cell-text);
  box-shadow: inset 0 0.07em 0 rgba(0, 0, 0, 0.35), inset 0 -0.05em 0 rgba(255, 255, 255, 0.10);
}
.meter-digits .d.dec { background: var(--volt); color: #1D2733; }
.meter-digits .sep { align-self: flex-end; padding: 0 0.05em 0.02em; color: var(--ink); }
.meter-unit { font-family: var(--font-display); font-weight: 600; font-size: 1.35rem; color: var(--ink-2); padding-bottom: 0.25rem; }
.meter-sm .meter-digits { font-size: clamp(2.4rem, 8vw, 3.4rem); }

/* home hero */
.hero { display: grid; gap: 1.5rem 3rem; padding: 2rem 0 0.5rem; align-items: end; }
@media (min-width: 900px) { .hero { grid-template-columns: minmax(0, 1.25fr) minmax(0, 1fr); } }
.hero h1 { max-width: 15ch; }
.picker { display: flex; flex-wrap: wrap; gap: 0.6rem; align-items: center; margin: 1.2rem 0 0.4rem; }
.picker label { width: 100%; font-weight: 600; }
.picker select { flex: 1 1 14rem; }
.reading { border-left: 6px solid var(--ink); padding: 0.2rem 0 0.2rem 1.1rem; }
.reading p { margin: 0.1rem 0; }

/* buttons and fields */
button, .btn {
  font: inherit; font-weight: 600; cursor: pointer; border-radius: 6px; border: 2px solid var(--ink);
  background: var(--ink); color: var(--paper); padding: 0.55rem 1.1rem; min-height: 44px; text-decoration: none; display: inline-flex; align-items: center;
}
button:hover, .btn:hover { background: var(--wire); border-color: var(--wire); color: #fff; }
input, select, textarea {
  font: inherit; color: var(--ink); background: var(--surface); border: 1px solid var(--field);
  border-radius: 6px; padding: 0.5rem 0.7rem; min-height: 44px; width: 100%;
}
input[type="checkbox"] { width: 1.2rem; min-height: 1.2rem; height: 1.2rem; accent-color: var(--ink); }

/* calculators */
.calc-layout { display: grid; gap: 1.5rem 2.5rem; margin-top: 1.2rem; align-items: start; }
@media (min-width: 880px) {
  .calc-layout { grid-template-columns: minmax(0, 1fr) minmax(0, 0.95fr); }
  .calc-layout .receipt { position: sticky; top: 1rem; }
}
.calc .field { margin: 0 0 1rem; }
.calc label { display: block; font-weight: 600; margin-bottom: 0.3rem; }
.calc .check { display: flex; align-items: center; gap: 0.6rem; font-weight: 600; }
.input-unit { display: flex; }
.input-unit input { border-top-right-radius: 0; border-bottom-right-radius: 0; }
.input-unit .unit {
  display: inline-flex; align-items: center; white-space: nowrap; padding: 0 0.75rem; color: var(--ink-2);
  border: 1px solid var(--field); border-left: 0; border-radius: 0 6px 6px 0; background: var(--paper); font-size: 0.95rem;
}
.help { font-size: 0.88rem; color: var(--ink-2); margin: 0.3rem 0 0; }

/* receipt: results and the state bill box */
.receipt { background: var(--surface); border: 1px solid var(--rule); border-top: 8px solid var(--ink); padding: 1rem 1.2rem 1.1rem; border-radius: 2px 2px 6px 6px; }
.receipt-head { display: flex; justify-content: space-between; gap: 1rem; flex-wrap: wrap; align-items: baseline; margin-bottom: 0.3rem; }
.receipt-head strong { font-family: var(--font-display); font-size: 1.35rem; font-weight: 600; }
.receipt-head span { font-size: 0.85rem; color: var(--ink-2); }
.lines { margin: 0; }
.line { display: flex; justify-content: space-between; align-items: baseline; gap: 1rem; padding: 0.42rem 0; border-bottom: 1px dotted var(--rule); }
.line dt { color: var(--ink-2); }
.line dd { margin: 0; font-weight: 600; font-variant-numeric: tabular-nums; text-align: right; white-space: nowrap; }
.total { display: flex; justify-content: space-between; align-items: baseline; gap: 1rem; margin: 0.5rem 0 0.2rem; padding-top: 0.55rem; border-top: 3px double var(--ink); }
.total strong { font-family: var(--font-display); font-size: clamp(1.7rem, 5vw, 2.1rem); font-weight: 700; font-variant-numeric: tabular-nums; text-align: right; }
.extra .line { border-bottom-style: solid; }
.extra .line:last-child { border-bottom: 0; }
.note { font-size: 0.88rem; color: var(--ink-2); margin: 0.7rem 0 0; }

/* tables */
.table-wrap { overflow-x: auto; -webkit-overflow-scrolling: touch; margin: 0.6rem 0 1rem; border: 1px solid var(--rule); border-radius: 6px; background: var(--surface); }
table.data { width: 100%; border-collapse: collapse; font-size: 0.97rem; }
table.data th, table.data td { padding: 0.55rem 0.75rem; border-bottom: 1px solid var(--rule); text-align: left; vertical-align: baseline; }
table.data thead th { font-weight: 600; color: var(--ink-2); background: var(--surface); position: sticky; top: 0; }
table.data td.r, table.data th.r { text-align: right; font-variant-numeric: tabular-nums; white-space: nowrap; }
table.data tr:last-child td { border-bottom: 0; }
table.data tr.is-current td { background: color-mix(in srgb, var(--volt) 22%, transparent); font-weight: 600; }
th[data-sort] button { all: unset; cursor: pointer; text-decoration: underline dotted; text-underline-offset: 0.2em; }
th[data-sort] button:focus-visible { outline: 3px solid var(--wire); }
th[aria-sort="ascending"] button::after { content: " \2191"; }
th[aria-sort="descending"] button::after { content: " \2193"; }

/* ranked bars */
.bars { list-style: none; padding: 0; margin: 0.4rem 0 1rem; }
.bars li { display: grid; grid-template-columns: minmax(7.5rem, 11rem) 1fr auto; gap: 0.7rem; align-items: center; padding: 0.3rem 0; max-width: none; }
.bars .bar { height: 0.7rem; border-radius: 0 3px 3px 0; background: var(--wire); min-width: 2px; }
.bars.low .bar { background: var(--low); }
.bars.high .bar { background: var(--high); }
.bars .v { font-variant-numeric: tabular-nums; font-weight: 600; }

.split { display: grid; gap: 0 2.5rem; }
@media (min-width: 800px) { .split { grid-template-columns: 1fr 1fr; } }

/* charts */
.chart { max-width: 680px; margin: 0.5rem 0 0.4rem; background: var(--surface); border: 1px solid var(--rule); border-radius: 6px; padding: 0.6rem 0.6rem 0.2rem; }
.chart svg { display: block; width: 100%; height: auto; overflow: visible; }
.chart .axis { stroke: var(--rule); stroke-width: 1; }
.chart .grid { stroke: var(--rule); stroke-width: 1; stroke-dasharray: 2 4; }
.chart .series { fill: none; stroke: var(--wire); stroke-width: 2.5; stroke-linejoin: round; stroke-linecap: round; }
.chart .series-us { fill: none; stroke: var(--ink-2); stroke-width: 1.5; stroke-dasharray: 5 4; }
.chart .pt { fill: var(--wire); stroke: var(--surface); stroke-width: 2; }
.chart text { fill: var(--ink-2); font-family: var(--font-body); font-size: 13px; }
.chart .label-strong { fill: var(--ink); font-weight: 700; font-size: 14px; }
.legend { display: flex; gap: 1.2rem; flex-wrap: wrap; font-size: 0.88rem; color: var(--ink-2); margin: 0.3rem 0 0; }
.legend i { display: inline-block; width: 1.4rem; height: 0; border-top: 2.5px solid var(--wire); vertical-align: middle; margin-right: 0.35rem; }
.legend i.us { border-top: 1.5px dashed var(--ink-2); }

/* calculator index and link lists */
.calc-list { list-style: none; padding: 0; margin: 0.4rem 0 1.4rem; border-top: 1px solid var(--rule); }
.calc-list li { padding: 0.75rem 0; border-bottom: 1px solid var(--rule); max-width: none; display: grid; gap: 0.1rem; }
@media (min-width: 720px) { .calc-list li { grid-template-columns: 17rem 1fr; gap: 1rem; } }
.calc-list a { font-weight: 600; }
.calc-list span { color: var(--ink-2); }
.states-grid { columns: 2 11rem; column-gap: 1.5rem; list-style: none; padding: 0; margin: 0.4rem 0 1.2rem; }
.states-grid li { break-inside: avoid; padding: 0.18rem 0; display: flex; justify-content: space-between; gap: 0.5rem; max-width: none; }

.facts { display: grid; gap: 0.2rem 2rem; margin: 0.6rem 0 0; }
@media (min-width: 700px) { .facts { grid-template-columns: repeat(3, minmax(0, 1fr)); } }
.facts div { border-top: 3px solid var(--ink); padding-top: 0.45rem; }
.facts strong { display: block; font-family: var(--font-display); font-size: 1.9rem; font-weight: 700; line-height: 1.1; font-variant-numeric: tabular-nums; }
.facts span { color: var(--ink-2); font-size: 0.95rem; }

.state-top { display: grid; gap: 1.2rem 3rem; align-items: start; margin-top: 0.4rem; }
@media (min-width: 900px) { .state-top { grid-template-columns: minmax(0, 1.2fr) minmax(0, 1fr); } }

details { margin: 0.6rem 0 1rem; }
summary { cursor: pointer; font-weight: 600; }
.faq dt { font-weight: 600; margin-top: 1rem; }
.faq dd { margin: 0.25rem 0 0; color: var(--ink); max-width: 72ch; }
.sources { font-size: 0.9rem; color: var(--ink-2); border-top: 1px solid var(--rule); margin-top: 2.5rem; padding-top: 1rem; }
.sources p { margin: 0.3rem 0; }
.callout { border-left: 6px solid var(--volt); background: var(--surface); padding: 0.8rem 1rem; margin: 1rem 0; border-radius: 0 6px 6px 0; }
.callout p { margin: 0.2rem 0; }

.ad-slot { margin: 1.5rem auto; text-align: center; max-width: 100%; overflow: hidden; }

/* footer */
.site-footer { border-top: 1px solid var(--rule); background: var(--surface); padding: 1.6rem 0 2.2rem; font-size: 0.92rem; color: var(--ink-2); }
.site-footer nav { display: flex; flex-wrap: wrap; gap: 0.4rem 1.2rem; margin-bottom: 0.7rem; }
.site-footer p { margin: 0.3rem 0; max-width: 90ch; }

@media print {
  .site-header nav, .ad-slot, .site-footer nav { display: none; }
  body { background: #fff; }
}

/* contact form */
.contact-form { max-width: 44rem; margin: 1.4rem 0; display: grid; gap: 1rem; }
.contact-form .cf-row { display: grid; gap: 1rem; }
@media (min-width: 640px) { .contact-form .cf-row { grid-template-columns: 1fr 1fr; } }
.contact-form label { display: block; font-weight: 600; margin-bottom: 0.3rem; }
.contact-form .opt { font-weight: 400; color: var(--ink-2); }
.contact-form textarea { resize: vertical; min-height: 9rem; line-height: 1.5; }
.contact-form .hint { margin: 0.35rem 0 0; font-size: 0.9rem; color: var(--ink-2); }
.contact-form .cf-send { display: flex; flex-wrap: wrap; align-items: center; gap: 0.8rem 1rem; }
.contact-form button[disabled] { opacity: 0.6; cursor: default; }
.cf-status { margin: 0; font-weight: 600; }
.cf-status.ok { color: var(--low); }
.cf-status.err { color: var(--high); }