:root {
  --paper: #f1eadc;
  --paper-light: #f8f4eb;
  --ink: #18241d;
  --ink-soft: #4f594f;
  --ember: #db4f2f;
  --ember-dark: #a92e19;
  --moss: #315747;
  --char: #14231d;
  --line: rgba(24, 36, 29, 0.22);
  --mono: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
  --sans: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --serif: Iowan Old Style, Baskerville, "Times New Roman", serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}

a { color: inherit; text-underline-offset: 0.2em; }
button, input, select { font: inherit; }

.skip-link {
  position: fixed;
  top: 1rem;
  left: 1rem;
  z-index: 100;
  padding: 0.7rem 1rem;
  background: var(--paper-light);
  transform: translateY(-200%);
}
.skip-link:focus { transform: none; }

.site-header {
  position: relative;
  z-index: 10;
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  gap: 2rem;
  padding: 1.1rem clamp(1.25rem, 4vw, 4.5rem);
  border-bottom: 1px solid var(--line);
  background: rgba(241, 234, 220, 0.92);
}

.wordmark { display: inline-flex; align-items: center; gap: 0.7rem; text-decoration: none; font-weight: 600; }
.wordmark-mark {
  display: inline-grid;
  width: 2.35rem;
  aspect-ratio: 1;
  place-items: center;
  border-radius: 50%;
  color: var(--paper-light);
  background: var(--ember);
  font: 500 0.7rem var(--mono);
}
.site-header nav { display: flex; gap: 1.5rem; font-size: 0.84rem; }
.site-header nav a, .lab-link { text-decoration: none; }
.site-header nav a:hover, .lab-link:hover { color: var(--ember-dark); }
.lab-link { justify-self: end; font: 500 0.7rem var(--mono); letter-spacing: 0.04em; text-transform: uppercase; }

.hero {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(320px, 0.65fr);
  gap: clamp(3rem, 8vw, 9rem);
  min-height: 720px;
  padding: clamp(5rem, 10vw, 9rem) clamp(1.25rem, 7vw, 8rem) clamp(4rem, 8vw, 7rem);
  overflow: hidden;
}
.hero::before {
  position: absolute;
  inset: 0;
  z-index: -1;
  content: "";
  background:
    radial-gradient(circle at 76% 32%, rgba(219, 79, 47, 0.16), transparent 17rem),
    repeating-linear-gradient(90deg, transparent 0 79px, rgba(24, 36, 29, 0.035) 80px);
}
.hero-copy { max-width: 860px; }
.eyebrow {
  margin: 0 0 1.2rem;
  color: var(--ember-dark);
  font: 500 0.72rem var(--mono);
  letter-spacing: 0.14em;
  text-transform: uppercase;
}
h1, h2, h3, p { margin-top: 0; }
h1, h2 { font-family: var(--serif); font-weight: 400; line-height: 0.96; letter-spacing: -0.035em; }
h1 { max-width: 920px; margin-bottom: 2rem; font-size: clamp(4rem, 8.7vw, 8.8rem); }
h1 em { color: var(--ember); font-weight: 400; }
.lede { max-width: 710px; color: var(--ink-soft); font-size: clamp(1.1rem, 1.8vw, 1.4rem); }
.hero-actions { display: flex; align-items: center; flex-wrap: wrap; gap: 1.4rem; margin-top: 2.5rem; }
.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 3.2rem;
  padding: 0.8rem 1.15rem;
  border: 1px solid transparent;
  border-radius: 0;
  cursor: pointer;
  font: 500 0.74rem var(--mono);
  letter-spacing: 0.06em;
  text-decoration: none;
  text-transform: uppercase;
}
.button-primary { color: var(--paper-light); background: var(--ember); }
.button-primary:hover { background: var(--ember-dark); }
.text-link { font: 500 0.76rem var(--mono); text-transform: uppercase; }

.project-ticket {
  align-self: center;
  padding: 1.4rem;
  color: var(--paper-light);
  background: var(--char);
  box-shadow: 20px 20px 0 rgba(49, 87, 71, 0.16);
  transform: rotate(1.2deg);
}
.project-ticket::before { display: block; height: 0.35rem; margin: -1.4rem -1.4rem 1.35rem; content: ""; background: var(--ember); }
.ticket-top, .ticket-total, .ticket-installed { display: flex; align-items: baseline; justify-content: space-between; gap: 1rem; }
.ticket-top { padding-bottom: 1rem; border-bottom: 1px dashed rgba(248,244,235,.4); font: 0.64rem var(--mono); letter-spacing: .1em; text-transform: uppercase; }
.ticket-total { padding: 2rem 0 1.3rem; }
.ticket-total strong { font: 400 2.2rem var(--serif); }
.ticket-additions { display: grid; grid-template-columns: auto repeat(2, 1fr); gap: 1rem; padding: 1.2rem 0; border-top: 1px dashed rgba(248,244,235,.25); }
.ticket-additions > span { grid-row: span 2; align-self: center; color: var(--ember); font-size: 2rem; }
.ticket-additions div { display: flex; flex-direction: column; }
.ticket-additions small { color: rgba(248,244,235,.62); font: .6rem var(--mono); text-transform: uppercase; }
.ticket-additions b { font-size: .9rem; }
.ticket-installed { padding: 1.3rem 0 .8rem; border-top: 1px solid rgba(248,244,235,.65); }
.ticket-installed strong { color: #ff7a55; font: 400 3rem var(--serif); }
.project-ticket > p { margin: 1rem 0 0; color: rgba(248,244,235,.68); font-size: .75rem; }

.signal-strip { display: grid; grid-template-columns: repeat(4, 1fr); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.signal-strip span { padding: 1rem clamp(1rem, 3vw, 2.5rem); border-right: 1px solid var(--line); font: .69rem var(--mono); letter-spacing: .04em; text-transform: uppercase; }
.signal-strip span:last-child { border-right: 0; }
.signal-strip b { margin-right: .8rem; color: var(--ember); }

.section { padding: clamp(5rem, 9vw, 9rem) clamp(1.25rem, 7vw, 8rem); }
.section-heading { display: grid; grid-template-columns: minmax(0, 1.2fr) minmax(260px, .55fr); gap: 3rem; align-items: end; margin-bottom: 4rem; }
.section-heading h2 { max-width: 880px; margin-bottom: 0; font-size: clamp(3rem, 6vw, 6.2rem); }
.section-heading > p { max-width: 470px; margin-bottom: .4rem; color: var(--ink-soft); }

.calculator-section { background: var(--paper-light); }
.calculator-shell { display: grid; grid-template-columns: minmax(0, .9fr) minmax(360px, .75fr); border: 1px solid var(--line); }
.calculator-controls { display: grid; grid-template-columns: repeat(2, 1fr); gap: 0; }
.calculator-controls label { display: flex; flex-direction: column; gap: .65rem; padding: 1.25rem; border-right: 1px solid var(--line); border-bottom: 1px solid var(--line); font: .7rem var(--mono); letter-spacing: .04em; text-transform: uppercase; }
.money-input { display: flex; align-items: center; gap: .35rem; font: 400 1.8rem var(--serif); }
.money-input input { width: 100%; padding: 0; border: 0; outline: 0; color: var(--ink); background: transparent; font: inherit; }
.range-field { grid-column: 1 / -1; }
.range-field > span { display: flex; justify-content: space-between; }
input[type="range"] { width: 100%; accent-color: var(--ember); }
.reset-button { grid-column: 1 / -1; padding: 1rem; border: 0; border-right: 1px solid var(--line); background: transparent; cursor: pointer; color: var(--ink-soft); font: .66rem var(--mono); text-transform: uppercase; }
.reset-button:hover { color: var(--ember-dark); background: rgba(219,79,47,.06); }
.calculator-result { display: flex; flex-direction: column; min-height: 500px; padding: clamp(2rem, 5vw, 4.5rem); color: var(--paper-light); background: var(--moss); }
.result-label { margin-bottom: .25rem; font: .7rem var(--mono); letter-spacing: .1em; text-transform: uppercase; }
#project-total { font: 400 clamp(4rem, 7vw, 7rem) var(--serif); line-height: 1; }
.range-line { display: flex; justify-content: space-between; gap: 1rem; margin-top: 1.2rem; padding-top: 1rem; border-top: 1px solid rgba(248,244,235,.3); font-size: .8rem; }
.cost-bars { display: grid; gap: .7rem; margin: 3rem 0; }
.bar-row { display: grid; grid-template-columns: 7rem 1fr auto; gap: .8rem; align-items: center; font: .64rem var(--mono); text-transform: uppercase; }
.bar-row progress { width: 100%; height: .5rem; border: 0; border-radius: 0; background: rgba(248,244,235,.14); }
.bar-row progress::-webkit-progress-bar { background: rgba(248,244,235,.14); }
.bar-row progress::-webkit-progress-value { background: #ff7753; }
.bar-row progress::-moz-progress-bar { background: #ff7753; }
.result-note { margin: auto 0 0; color: rgba(248,244,235,.72); font-size: .78rem; }

.compare-section { border-top: 1px solid var(--line); }
.filter-bar { display: grid; grid-template-columns: repeat(3, 1fr) auto; align-items: end; gap: 1px; margin-bottom: 2.5rem; background: var(--line); border: 1px solid var(--line); }
.filter-bar label { display: grid; gap: .55rem; min-height: 5.2rem; padding: .8rem 1rem; background: var(--paper); font: .62rem var(--mono); letter-spacing: .06em; text-transform: uppercase; }
.filter-bar select { border: 0; color: var(--ink); background: transparent; font: .9rem var(--sans); }
#result-count { align-self: stretch; display: grid; place-items: center; min-width: 8rem; padding: 1rem; color: var(--paper-light); background: var(--char); font: .65rem var(--mono); text-transform: uppercase; }
.product-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1px; background: var(--line); border: 1px solid var(--line); }
.product-card { min-width: 0; padding: 1.4rem; background: var(--paper); }
.product-card[hidden] { display: none; }
.product-meta { display: flex; justify-content: space-between; gap: 1rem; margin-bottom: 2.8rem; color: var(--ink-soft); font: .61rem var(--mono); text-transform: uppercase; }
.heat-tag { color: var(--ember-dark); }
.product-card h3 { min-height: 3.4rem; margin-bottom: .6rem; font: 400 1.75rem/1.05 var(--serif); }
.product-brand { color: var(--ink-soft); font-size: .78rem; }
.product-price { display: block; margin: 2rem 0 1rem; font: 400 2.35rem var(--serif); }
.product-price small { display: block; color: var(--ink-soft); font: .58rem var(--mono); letter-spacing: .03em; text-transform: uppercase; }
.product-specs { display: grid; grid-template-columns: 1fr 1fr; margin: 1.2rem 0 1.5rem; border-top: 1px solid var(--line); border-left: 1px solid var(--line); }
.product-specs div { min-height: 4.2rem; padding: .65rem; border-right: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.product-specs small { display: block; margin-bottom: .25rem; color: var(--ink-soft); font: .55rem var(--mono); text-transform: uppercase; }
.product-specs b { font-size: .78rem; }
.product-caveat { min-height: 3.6rem; color: var(--ink-soft); font-size: .72rem; }
.product-link { display: inline-flex; margin-top: 1rem; color: var(--ember-dark); font: .68rem var(--mono); text-transform: uppercase; }
.comparison-caveat { display: grid; grid-template-columns: .3fr 1fr; gap: 2rem; margin-top: 2rem; padding: 1.25rem 0; border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); font-size: .8rem; }
.comparison-caveat p { margin: 0; color: var(--ink-soft); }

.quote-section { color: var(--paper-light); background: var(--char); }
.section-heading-light .eyebrow { color: #ff7753; }
.section-heading-light > p { color: rgba(248,244,235,.65); }
.brief-grid { display: grid; grid-template-columns: repeat(4, 1fr); border-top: 1px solid rgba(248,244,235,.22); border-left: 1px solid rgba(248,244,235,.22); }
.brief-grid label { display: flex; align-items: flex-start; gap: .8rem; min-height: 8rem; padding: 1rem; border-right: 1px solid rgba(248,244,235,.22); border-bottom: 1px solid rgba(248,244,235,.22); font-size: .82rem; cursor: pointer; }
.brief-grid input { width: 1rem; height: 1rem; margin: .12rem 0 0; accent-color: var(--ember); }
.button-paper { margin-top: 2rem; color: var(--char); background: var(--paper-light); }
.button-paper:hover { background: #fff; }
.copy-status { margin-left: 1rem; color: #ff7753; font: .66rem var(--mono); }

.installer-list { border-top: 1px solid var(--line); }
.installer-list article { display: grid; grid-template-columns: .9fr 1fr auto; align-items: center; gap: 2rem; padding: 1.4rem 0; border-bottom: 1px solid var(--line); }
.installer-list article > div { display: flex; align-items: baseline; gap: 1rem; }
.installer-list span { color: var(--ember); font: .62rem var(--mono); }
.installer-list h3 { margin: 0; font: 400 1.45rem var(--serif); }
.installer-list p { margin: 0; color: var(--ink-soft); font-size: .8rem; }
.installer-list a { font: .65rem var(--mono); text-transform: uppercase; }
.submission-callout { display: grid; grid-template-columns: 1fr auto; align-items: center; gap: 3rem; margin-top: 3rem; padding: 2rem; border: 1px solid var(--ink); }
.submission-callout h3 { margin-bottom: .35rem; font: 400 2rem var(--serif); }
.submission-callout p:last-child { margin: 0; color: var(--ink-soft); font-size: .78rem; }
.button-outline { border-color: var(--ink); }
.button-outline:hover { color: var(--paper-light); background: var(--ink); }

.evidence-section { background: #e8dfcf; }
.evidence-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1px; background: var(--line); border: 1px solid var(--line); }
.evidence-card { position: relative; min-height: 390px; padding: 1.5rem; background: #e8dfcf; }
.evidence-card::before { display: block; width: 3rem; height: .35rem; margin-bottom: 4rem; content: ""; background: var(--ember); }
.evidence-card.evidence-moderate::before { background: #b8771c; }
.evidence-card.evidence-limited::before { background: #826c52; }
.evidence-grade { font: .62rem var(--mono); letter-spacing: .05em; text-transform: uppercase; }
.evidence-card h3 { margin: 1rem 0; font: 400 2rem/1.05 var(--serif); }
.evidence-card p { color: var(--ink-soft); font-size: .84rem; }
.evidence-card a { position: absolute; bottom: 1.5rem; left: 1.5rem; font: .64rem var(--mono); text-transform: uppercase; }
.safety-note { display: grid; grid-template-columns: .3fr 1fr; gap: 2rem; margin-top: 2rem; padding-top: 1.5rem; border-top: 1px solid var(--line); font-size: .8rem; }
.safety-note p { margin: 0; color: var(--ink-soft); }

.method-section { display: grid; grid-template-columns: .7fr 1fr; gap: clamp(3rem, 8vw, 9rem); }
.method-section h2 { font-size: clamp(3rem, 5vw, 5.2rem); }
.method-section ol { margin: 0; padding: 0; counter-reset: method; list-style: none; border-top: 1px solid var(--line); }
.method-section li { display: grid; grid-template-columns: .65fr 1fr; gap: 1.5rem; padding: 1.2rem 0; border-bottom: 1px solid var(--line); counter-increment: method; }
.method-section li::before { grid-row: span 2; content: "0" counter(method); color: var(--ember); font: .62rem var(--mono); }
.method-section li b { font-size: .85rem; }
.method-section li span { color: var(--ink-soft); font-size: .78rem; }

.disclosure-band { padding: 1.25rem clamp(1.25rem, 7vw, 8rem); color: var(--paper-light); background: var(--ember-dark); }
.disclosure-band p { max-width: 1100px; margin: 0; font-size: .78rem; }
footer { display: grid; grid-template-columns: 1fr 1fr auto; align-items: center; gap: 2rem; padding: 3rem clamp(1.25rem, 7vw, 8rem); color: var(--paper-light); background: #0b1511; }
footer > div:first-child { display: flex; align-items: center; gap: .8rem; }
footer p { margin: 0; color: rgba(248,244,235,.62); font-size: .76rem; }
.footer-links { display: flex; gap: 1rem; font: .65rem var(--mono); text-transform: uppercase; }

@media (max-width: 1000px) {
  .site-header { grid-template-columns: 1fr auto; }
  .site-header nav { display: none; }
  .hero { grid-template-columns: 1fr; min-height: auto; }
  .project-ticket { max-width: 620px; transform: none; }
  .section-heading, .calculator-shell, .method-section { grid-template-columns: 1fr; }
  .product-grid { grid-template-columns: repeat(2, 1fr); }
  .brief-grid { grid-template-columns: repeat(2, 1fr); }
  .installer-list article { grid-template-columns: 1fr 1fr; }
  .installer-list article a { grid-column: 2; }
}

@media (max-width: 680px) {
  .site-header { gap: .8rem; padding-inline: 1rem; }
  .wordmark > span:last-child { font-size: .85rem; }
  .lab-link { max-width: 9rem; text-align: right; font-size: .55rem; }
  .hero { padding-top: 4rem; }
  h1 { font-size: clamp(3.4rem, 17vw, 5.2rem); }
  .signal-strip { grid-template-columns: repeat(2, 1fr); }
  .signal-strip span:nth-child(2) { border-right: 0; }
  .signal-strip span:nth-child(-n+2) { border-bottom: 1px solid var(--line); }
  .section-heading { gap: 1.5rem; }
  .section-heading h2 { font-size: 3.2rem; }
  .calculator-controls, .product-grid, .evidence-grid { grid-template-columns: 1fr; }
  .calculator-controls label { border-right: 0; }
  .filter-bar { grid-template-columns: 1fr; }
  #result-count { min-height: 3rem; }
  .comparison-caveat, .safety-note { grid-template-columns: 1fr; gap: .7rem; }
  .brief-grid { grid-template-columns: 1fr; }
  .brief-grid label { min-height: 5rem; }
  .installer-list article { grid-template-columns: 1fr; gap: .6rem; }
  .installer-list article a { grid-column: auto; }
  .submission-callout { grid-template-columns: 1fr; }
  .method-section li { grid-template-columns: 1fr; gap: .4rem; }
  .method-section li::before { grid-row: auto; }
  footer { grid-template-columns: 1fr; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { scroll-behavior: auto !important; transition-duration: 0.01ms !important; animation-duration: 0.01ms !important; }
}