/* Homestead — Volt brand. Tokens mirror the Homestead design system. */
:root {
  --bg: #0B1020;
  --surface: #131A2E;
  --line: #1E2740;
  --line-strong: #2A3552;
  --ink: #F2F4F8;
  --muted: #9AA6BF;
  --volt: #C8F94A;
  --on-volt: #0B1020;
  --sky: #8FB4FF;
  --warn: #FFE2A8;
  --on-warn: #5A3A00;
  --font-display: "Space Grotesk", system-ui, sans-serif;
  --font-sans: Inter, system-ui, sans-serif;
  --font-mono: "JetBrains Mono", ui-monospace, monospace;
  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 20px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}
img, svg { display: block; max-width: 100%; }
a { color: var(--volt); }
a:hover { color: #DBFB85; }
:focus-visible { outline: 2px solid var(--volt); outline-offset: 3px; border-radius: 4px; }

.wrap { max-width: 1200px; margin: 0 auto; padding: 0 24px; }
.wrap-narrow { max-width: 900px; margin: 0 auto; padding: 0 24px; }
.section { padding: 96px 0; }
.band { background: var(--surface); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.stack { display: flex; flex-direction: column; }
.row { display: flex; flex-wrap: wrap; gap: 16px; }
.row > * { flex: 1 1 260px; min-width: 0; }

/* Logo */
.logo {
  font-family: var(--font-display);
  font-weight: 600;
  letter-spacing: -0.045em;
  line-height: 1;
  color: var(--ink);
  text-decoration: none;
  white-space: nowrap;
}
.logo .node {
  display: inline-block;
  width: 0.52em;
  height: 0.52em;
  border-radius: 999px;
  background: var(--volt);
  margin: 0 0.03em;
  vertical-align: baseline;
}
.logo .node.air { background: var(--sky); }
.logo .line { color: var(--muted); font-weight: 500; }
.blueprint { font-family: var(--font-display); font-weight: 700; letter-spacing: -0.05em; line-height: 0.9; }
.blueprint .outline { color: transparent; -webkit-text-stroke: 2px var(--volt); }

/* Type */
.eyebrow { margin: 0; font-family: var(--font-mono); font-size: 13px; letter-spacing: 0.12em; text-transform: uppercase; color: var(--volt); }
.eyebrow.sky { color: var(--sky); }
.label { font-family: var(--font-mono); font-size: 11px; letter-spacing: 0.12em; text-transform: uppercase; color: var(--muted); }
.mono { font-family: var(--font-mono); }
h1, h2, h3 { margin: 0; font-family: var(--font-display); font-weight: 600; text-wrap: balance; }
h1 { font-size: clamp(40px, 6.5vw, 76px); line-height: 1.02; letter-spacing: -0.04em; }
h2 { font-size: clamp(32px, 4.2vw, 48px); line-height: 1.06; letter-spacing: -0.03em; }
h3 { font-size: 22px; letter-spacing: -0.02em; }
p { margin: 0; text-wrap: pretty; }
.lead { font-size: 19px; line-height: 1.6; color: var(--muted); max-width: 580px; }
.muted { color: var(--muted); }
.small { font-size: 13px; color: var(--muted); }
.section-head { gap: 12px; max-width: 680px; margin-bottom: 40px; }

/* Buttons */
.btns { display: flex; flex-wrap: wrap; gap: 12px; }
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  min-height: 52px; padding: 0 26px; border-radius: 999px;
  font-weight: 600; font-size: 16px; text-decoration: none;
  border: 1px solid transparent; transition: transform .12s ease, background .12s ease;
}
.btn:hover { transform: translateY(-1px); }
.btn-primary { background: var(--volt); color: var(--on-volt); }
.btn-primary:hover { background: #DBFB85; color: var(--on-volt); }
.btn-ghost { border-color: var(--line-strong); color: var(--ink); }
.btn-ghost:hover { border-color: var(--muted); color: var(--ink); }
.btn-sky { background: var(--sky); color: var(--bg); }
.btn-sky:hover { background: #B5CDFF; color: var(--bg); }
.btn-dark { background: var(--bg); color: var(--ink); }
.btn-dark:hover { color: var(--volt); }
.btn-sm { min-height: 44px; padding: 0 20px; font-size: 15px; }

/* Header */
.site-header { border-bottom: 1px solid var(--line); }
.nav { display: flex; flex-wrap: wrap; align-items: center; gap: 16px 32px; padding-top: 18px; padding-bottom: 18px; }
.nav .logo { font-size: 30px; }
.nav-links { display: flex; flex-wrap: wrap; align-items: center; gap: 8px 28px; margin-left: auto; }
.nav-links a:not(.btn) { color: var(--muted); text-decoration: none; font-size: 15px; }
.nav-links a:not(.btn):hover { color: var(--ink); }

/* Hero */
.hero { display: flex; flex-wrap: wrap; gap: 56px; align-items: center; padding-top: 88px; padding-bottom: 80px; }
.hero-copy { flex: 1 1 520px; min-width: 0; gap: 26px; }
.hero-side { flex: 1 1 360px; min-width: 0; max-width: 460px; gap: 12px; }

/* Cards */
.card { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius-lg); padding: 26px; gap: 12px; }
.card-dark { background: var(--bg); border: 1px solid var(--line); border-radius: var(--radius-lg); padding: 30px; gap: 14px; }
.card-volt { border: 2px solid var(--volt); }
.card-sky { border-color: var(--sky); }
.card ul, .card-dark ul { margin: 0; padding-left: 18px; color: var(--muted); font-size: 15px; display: flex; flex-direction: column; gap: 6px; }
.step-num { font-family: var(--font-mono); font-size: 13px; color: var(--volt); }
.step-num.sky { color: var(--sky); }
.topline { padding: 26px 0 0; border-top: 2px solid var(--line-strong); gap: 10px; }
.topline.on { border-top-color: var(--volt); }
.push { margin-top: auto; }

/* Readings and meters */
.score { font-family: var(--font-display); font-weight: 600; font-size: 80px; line-height: 1; letter-spacing: -0.05em; }
.reading { font-family: var(--font-mono); font-size: 26px; line-height: 1.1; }
.reading-lg { font-family: var(--font-mono); font-size: 64px; line-height: 1; letter-spacing: -0.03em; }
.volt-text { color: var(--volt); }
.sky-text { color: var(--sky); }
.meter { height: 10px; border-radius: 999px; background: var(--line); overflow: hidden; }
.meter.thin { height: 8px; }
.meter > span { display: block; height: 100%; background: var(--volt); border-radius: 999px; }
.meter.sky > span { background: var(--sky); }
.meter-row { display: flex; align-items: center; gap: 10px; }
.meter-row .label { width: 70px; flex-shrink: 0; }
.meter-row .meter { flex: 1; }
.meter-row .val { width: 28px; text-align: right; font-family: var(--font-mono); font-size: 13px; }
.chip-warn { padding: 4px 10px; border-radius: var(--radius-sm); background: var(--warn); color: var(--on-warn); font-size: 12px; font-weight: 600; }
.scale { position: relative; height: 10px; border-radius: 999px; background: var(--line); }
.scale .fill { position: absolute; left: 0; top: 0; height: 10px; border-radius: 999px; background: var(--ink); }
.scale .tick { position: absolute; top: -5px; width: 2px; height: 20px; background: var(--muted); }
.scale-labels { position: relative; height: 16px; font-family: var(--font-mono); font-size: 10px; color: var(--muted); }
.scale-labels span { position: absolute; }
.mini { flex: 1 1 120px; padding: 18px; gap: 6px; }

/* Lines list */
.line-row { display: flex; flex-wrap: wrap; align-items: baseline; gap: 6px 12px; padding: 18px 20px; background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius-md); }
.line-row .logo { font-size: 22px; }
.line-row .note { margin-left: auto; font-size: 13px; color: var(--muted); }

/* Facts */
.facts { display: flex; flex-wrap: wrap; gap: 32px; padding-top: 40px; padding-bottom: 40px; }
.facts > div { flex: 1 1 260px; gap: 8px; }
.fact-num { font-family: var(--font-mono); font-size: 36px; }
.fact-num small { font-size: 18px; color: var(--muted); }

/* Pricing */
.price { font-family: var(--font-mono); font-size: 40px; line-height: 1.1; }
.price small { font-size: 16px; color: var(--muted); }
.credit { margin-top: 16px; padding: 18px 22px; border-radius: var(--radius-md); background: var(--bg); border: 1px solid var(--line-strong); font-size: 16px; }
.credit .mono { font-size: 12px; letter-spacing: 0.1em; color: var(--volt); margin-right: 10px; }

/* FAQ */
.faq { gap: 0; }
.faq details { border-bottom: 1px solid var(--line); padding: 22px 0; }
.faq summary { cursor: pointer; list-style: none; font-family: var(--font-display); font-weight: 600; font-size: 20px; display: flex; justify-content: space-between; gap: 16px; }
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: "+"; color: var(--volt); font-family: var(--font-mono); }
.faq details[open] summary::after { content: "–"; }
.faq details p { margin-top: 10px; color: var(--muted); font-size: 16px; line-height: 1.6; }

/* CTA band */
.cta { background: var(--volt); color: var(--on-volt); }
.cta-inner { display: flex; flex-wrap: wrap; gap: 24px; align-items: center; justify-content: space-between; padding-top: 72px; padding-bottom: 72px; }
.cta h2 { max-width: 660px; }
.cta p { color: #26330F; font-size: 17px; margin-top: 10px; }

/* Footer */
.site-footer { display: flex; flex-wrap: wrap; gap: 24px 48px; padding-top: 48px; padding-bottom: 48px; }
.site-footer .logo { font-size: 28px; }
.site-footer a { color: var(--ink); text-decoration: none; }
.site-footer a:hover { color: var(--volt); }
.footer-col { gap: 8px; font-size: 14px; }

/* Blueprint band */
.blueprint-band { overflow: hidden; padding: 88px 0; }
.blueprint-band .blueprint { font-size: clamp(64px, 14vw, 200px); }
.blueprint-band p { margin-top: 20px; font-size: 20px; color: var(--muted); }

@media (max-width: 640px) {
  .section { padding: 64px 0; }
  .hero { padding-top: 48px; padding-bottom: 56px; gap: 40px; }
  .nav-links { margin-left: 0; width: 100%; }
  .score { font-size: 64px; }
  .reading-lg { font-size: 52px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .btn { transition: none; }
  .btn:hover { transform: none; }
}