:root {
  --bg: #0c0c0c;
  --bg-warm: #141210;
  --surface: #1c1918;
  --surface-2: #242120;
  --text: #f5f2eb;
  --muted: rgba(245, 242, 235, 0.66);
  --muted-2: rgba(245, 242, 235, 0.48);
  --accent: #00c853;
  --accent-hover: #00e676;
  --gold: #c4a265;
  --danger: #ff685f;
  --line: rgba(245, 242, 235, 0.13);
  --line-strong: rgba(245, 242, 235, 0.35);
  --display: "Space Grotesk", sans-serif;
  --body: "Inter", sans-serif;
  --mono: "JetBrains Mono", monospace;
  --serif: Georgia, "Times New Roman", serif;
  --header-h: 72px;
  --max: 1180px;
  --ease: cubic-bezier(0.25, 1, 0.5, 1);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--body);
  -webkit-font-smoothing: antialiased;
  overflow-x: clip;
}
body.menu-open { overflow: hidden; }
a { color: inherit; text-decoration: none; }
img { display: block; max-width: 100%; height: auto; }
button, input, select { font: inherit; }
button { color: inherit; }

.skip-link {
  position: fixed;
  left: 1rem;
  top: -5rem;
  z-index: 5000;
  padding: .75rem 1rem;
  background: var(--accent);
  color: var(--bg);
  font-family: var(--mono);
  font-size: .78rem;
  font-weight: 700;
}
.skip-link:focus { top: 1rem; }

.site-header {
  position: fixed;
  inset: 0 0 auto;
  z-index: 1000;
  height: var(--header-h);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 2rem;
  padding: 0 2rem;
  background: rgba(12, 12, 12, .94);
  border-bottom: 1px solid var(--line-strong);
  backdrop-filter: blur(16px);
}
.brand {
  flex: 0 0 auto;
  font-family: var(--display);
  font-weight: 800;
  letter-spacing: -.025em;
  font-size: 1.12rem;
}
.brand span { color: var(--accent); }
.desktop-nav { display: flex; align-items: center; gap: 1.5rem; margin-left: auto; }
.desktop-nav a,
.nav-shop {
  font-family: var(--mono);
  font-size: .65rem;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--muted);
  transition: color .2s ease;
}
.desktop-nav a:hover,
.desktop-nav a[aria-current="page"],
.nav-shop:hover { color: var(--accent); }
.nav-actions { display: flex; align-items: center; gap: 1.2rem; }
.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: .78rem 1.2rem;
  border: 1px solid var(--line-strong);
  font-family: var(--mono);
  font-size: .68rem;
  font-weight: 700;
  letter-spacing: .09em;
  text-transform: uppercase;
  transition: transform .2s var(--ease), background .2s, border-color .2s, color .2s;
}
.button:hover { transform: translateY(-2px); border-color: var(--text); }
.button-primary { background: var(--accent); color: var(--bg); border-color: var(--accent); }
.button-primary:hover { background: var(--accent-hover); border-color: var(--accent-hover); }
.button-gold { color: var(--gold); border-color: var(--gold); }
.button-gold:hover { background: var(--gold); color: var(--bg); }
.menu-button {
  display: none;
  width: 44px;
  height: 44px;
  border: 1px solid var(--line);
  background: transparent;
  cursor: pointer;
  align-items: center;
  justify-content: center;
}
.menu-button span,
.menu-button::before,
.menu-button::after {
  content: "";
  position: absolute;
  width: 19px;
  height: 2px;
  background: var(--text);
  transition: transform .25s var(--ease), opacity .2s;
}
.menu-button span { transform: translateY(0); }
.menu-button::before { transform: translateY(-6px); }
.menu-button::after { transform: translateY(6px); }
.menu-button[aria-expanded="true"] span { opacity: 0; }
.menu-button[aria-expanded="true"]::before { transform: rotate(45deg); }
.menu-button[aria-expanded="true"]::after { transform: rotate(-45deg); }
.mobile-nav {
  display: none;
  position: fixed;
  inset: var(--header-h) 0 0;
  z-index: 999;
  background: var(--bg);
  padding: 1.5rem 1.25rem 5rem;
  overflow: auto;
}
.mobile-nav.open { display: block; }
.mobile-nav a {
  display: block;
  padding: 1.1rem 0;
  border-bottom: 1px solid var(--line);
  font-family: var(--mono);
  font-size: .83rem;
  letter-spacing: .1em;
  text-transform: uppercase;
}
.mobile-nav .button { margin-top: 1.25rem; width: 100%; }

main { padding-top: var(--header-h); }
.container { width: min(var(--max), calc(100% - 4rem)); margin-inline: auto; }
.eyebrow,
.section-label {
  font-family: var(--mono);
  font-size: .65rem;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--accent);
}
.section-label { color: var(--gold); }

.hero {
  position: relative;
  min-height: 680px;
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(360px, 600px);
  border-bottom: 1px solid var(--line-strong);
}
.hero-copy {
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 7rem 4rem 6rem max(2rem, calc((100vw - var(--max)) / 2));
  background:
    radial-gradient(circle at 22% 38%, rgba(0, 200, 83, .10), transparent 46%),
    var(--bg);
}
/* Width is governed by this inner wrapper, not by the gutter formula, so the
   text measure never collapses on ultrawide displays. */
.hero-copy-inner { display: flex; flex-direction: column; width: min(100%, 42rem); }
.hero-rule {
  width: 3.25rem;
  height: 2px;
  margin-bottom: 1.4rem;
  background: var(--accent);
  transform-origin: left center;
  animation: heroRule .9s var(--ease) both;
}
@keyframes heroRule { from { transform: scaleX(0); opacity: 0; } to { transform: scaleX(1); opacity: 1; } }
.hero h1 {
  margin: 1.15rem 0 1.25rem;
  max-width: 42rem;
  font-family: var(--serif);
  font-size: clamp(2.9rem, 5.4vw, 5.4rem);
  font-weight: 400;
  letter-spacing: -.045em;
  line-height: .98;
  text-wrap: balance;
}
.hero-lede {
  max-width: 38rem;
  margin: 0;
  color: var(--muted);
  font-size: 1.02rem;
  line-height: 1.75;
  text-wrap: pretty;
}
.hero-actions { display: flex; flex-wrap: wrap; gap: .8rem; margin-top: 2rem; }
.hero-facts { display: flex; flex-wrap: wrap; gap: .55rem; margin-top: 1.85rem; }
.hero-fact {
  flex: 1 1 auto;
  min-width: 8rem;
  padding: .8rem .9rem;
  border: 1px solid var(--line-strong);
  background: rgba(245, 242, 235, .022);
}
.hero-fact strong {
  display: block;
  font-family: var(--display);
  font-size: 1rem;
  line-height: 1.12;
  letter-spacing: -.01em;
}
.hero-fact span {
  display: block;
  margin-top: .3rem;
  color: var(--muted-2);
  font-family: var(--mono);
  font-size: .55rem;
  letter-spacing: .1em;
  line-height: 1.45;
  text-transform: uppercase;
}
.hero-fact-fire { border-color: var(--gold); }
.hero-fact-fire strong { color: var(--gold); }
.hero-media {
  position: relative;
  min-height: 540px;
  overflow: hidden;
  background: var(--surface);
  border-left: 1px solid var(--line-strong);
}
.hero-media img { width: 100%; height: 100%; object-fit: cover; }
.hero-media::after {
  content: "";
  position: absolute;
  inset: 0;
  background:
    linear-gradient(90deg, rgba(12,12,12,.4), transparent 26%),
    linear-gradient(0deg, rgba(12,12,12,.62), transparent 42%);
  pointer-events: none;
}
.media-caption {
  position: absolute;
  z-index: 2;
  left: 1rem;
  bottom: 1rem;
  display: inline-flex;
  align-items: center;
  gap: .45rem;
  padding: .45rem .65rem;
  background: rgba(12,12,12,.82);
  border: 1px solid var(--line);
  font-family: var(--mono);
  font-size: .57rem;
  letter-spacing: .12em;
  color: var(--muted);
  text-transform: uppercase;
}
.media-caption::before {
  content: "";
  width: 6px;
  height: 6px;
  background: var(--accent);
}

.fact-row {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  border-bottom: 1px solid var(--line-strong);
  background: var(--surface);
}
.fact { padding: 1.6rem 2rem; border-right: 1px solid var(--line); }
.fact:last-child { border-right: 0; }
.fact strong { display: block; font-family: var(--display); font-size: 1.25rem; margin-bottom: .35rem; }
.fact span { color: var(--muted); font-size: .78rem; line-height: 1.55; }

.section { padding: 6rem 0; border-bottom: 1px solid var(--line); }
.section-alt { background: var(--bg-warm); }
.section-head { display: grid; grid-template-columns: minmax(0, .8fr) minmax(0, 1.2fr); gap: 4rem; align-items: end; margin-bottom: 3rem; }
.section h2 {
  margin: .8rem 0 0;
  font-family: var(--serif);
  font-size: clamp(2.15rem, 4vw, 3.8rem);
  font-weight: 400;
  line-height: 1.04;
  letter-spacing: -.035em;
}
.section-intro { color: var(--muted); line-height: 1.8; max-width: 680px; margin: 0; }
.inline-link { color: var(--accent); border-bottom: 1px solid rgba(0,200,83,.45); }
.inline-link:hover { border-color: var(--accent); }

.card-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 1rem; }
.card {
  background: var(--surface);
  border: 1px solid var(--line);
  padding: 2rem;
  transition: transform .25s var(--ease), border-color .25s;
}
a.card:hover { transform: translateY(-4px); border-color: var(--accent); }
.card-code { font-family: var(--mono); color: var(--gold); font-size: .6rem; letter-spacing: .14em; text-transform: uppercase; }
.card h3 { font-family: var(--display); font-size: 1.3rem; line-height: 1.2; margin: .8rem 0; }
.card p { margin: 0; color: var(--muted); line-height: 1.7; font-size: .9rem; }
.card-link { display: inline-block; margin-top: 1.4rem; color: var(--accent); font-family: var(--mono); font-size: .65rem; letter-spacing: .1em; text-transform: uppercase; }

.product-card { padding: 0; overflow: hidden; }
.product-card img { width: 100%; aspect-ratio: 4 / 3; object-fit: cover; background: var(--surface-2); }
.product-card-body { padding: 1.65rem; }
.product-tag {
  display: inline-flex;
  padding: .3rem .55rem;
  border: 1px solid var(--line-strong);
  color: var(--muted);
  font-family: var(--mono);
  font-size: .56rem;
  letter-spacing: .12em;
  text-transform: uppercase;
}
.product-tag-fire { border-color: var(--gold); color: var(--gold); }

.calculator {
  display: grid;
  grid-template-columns: minmax(0, .9fr) minmax(0, 1.1fr);
  background: var(--surface);
  border: 1px solid var(--line-strong);
}
.calc-form { padding: 2.5rem; border-right: 1px solid var(--line); }
.calc-result { padding: 2.5rem; display: flex; flex-direction: column; justify-content: center; background: linear-gradient(135deg, rgba(0,200,83,.08), transparent 55%); }
.field-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 1rem; }
.field label { display: block; margin-bottom: .45rem; color: var(--muted); font-size: .78rem; }
.field input,
.field select {
  width: 100%;
  min-height: 48px;
  border: 1px solid var(--line-strong);
  background: var(--bg);
  color: var(--text);
  padding: .75rem .8rem;
  border-radius: 0;
}
.field input:focus,
.field select:focus { outline: 2px solid var(--accent); outline-offset: 2px; }
.calc-help { color: var(--muted-2); font-size: .72rem; line-height: 1.6; margin: 1rem 0 0; }
.calc-number { font-family: var(--serif); font-size: clamp(3rem, 6vw, 5.2rem); line-height: 1; margin: .7rem 0; }
.calc-summary { color: var(--muted); line-height: 1.75; margin: 0; }
.calc-result[aria-live] { min-height: 260px; }

.table-wrap { overflow-x: auto; border: 1px solid var(--line-strong); }
table { width: 100%; border-collapse: collapse; min-width: 660px; background: var(--surface); }
th, td { padding: 1rem 1.15rem; text-align: left; border-bottom: 1px solid var(--line); vertical-align: top; }
th { font-family: var(--mono); font-size: .62rem; letter-spacing: .1em; text-transform: uppercase; color: var(--gold); }
td { color: var(--muted); font-size: .88rem; line-height: 1.6; }
tr:last-child td { border-bottom: 0; }

.callout {
  padding: 1.5rem 1.75rem;
  border-left: 3px solid var(--gold);
  background: var(--surface);
  color: var(--muted);
  line-height: 1.75;
}
.callout strong { color: var(--text); }
.callout-danger { border-left-color: var(--danger); }

.checklist { display: grid; gap: .7rem; margin: 1.5rem 0 0; padding: 0; list-style: none; }
.checklist li { position: relative; padding-left: 1.7rem; color: var(--muted); line-height: 1.65; }
.checklist li::before { content: "✓"; position: absolute; left: 0; color: var(--accent); font-weight: 800; }

.faq { max-width: 900px; }
.faq details { border-top: 1px solid var(--line); }
.faq details:last-child { border-bottom: 1px solid var(--line); }
.faq summary {
  cursor: pointer;
  list-style: none;
  padding: 1.3rem 2.4rem 1.3rem 0;
  position: relative;
  font-family: var(--display);
  font-size: 1.05rem;
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: "+"; position: absolute; right: .2rem; color: var(--accent); font-family: var(--mono); }
.faq details[open] summary::after { content: "−"; }
.faq details p { color: var(--muted); line-height: 1.75; margin: 0; padding: 0 0 1.35rem; max-width: 760px; }

.pdp-hero { min-height: 620px; }
.pdp-title { font-size: clamp(2.65rem, 5vw, 5rem) !important; }
.product-facts { display: flex; flex-wrap: wrap; gap: .55rem; margin-top: 1.5rem; }
.product-fact { padding: .45rem .65rem; border: 1px solid var(--line); color: var(--muted); font-family: var(--mono); font-size: .59rem; letter-spacing: .07em; text-transform: uppercase; }
.product-fact-fire { border-color: var(--gold); color: var(--gold); }

.split { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 1rem; }
.split-panel { padding: 2.2rem; border: 1px solid var(--line); background: var(--surface); }
.split-panel h3 { margin: .6rem 0 1rem; font-family: var(--display); font-size: 1.35rem; }
.split-panel p { color: var(--muted); line-height: 1.75; margin: 0; }

.cta-band { padding: 5rem 0; background: var(--accent); color: var(--bg); }
.cta-band-inner { display: grid; grid-template-columns: 1fr auto; gap: 2rem; align-items: center; }
.cta-band h2 { color: var(--bg); margin: 0 0 .6rem; font-size: clamp(2rem, 4vw, 3.5rem); }
.cta-band p { margin: 0; color: rgba(12,12,12,.72); max-width: 720px; line-height: 1.7; }
.cta-band .button { border-color: var(--bg); color: var(--bg); }
.cta-band .button:hover { background: var(--bg); color: var(--text); }

.site-footer { padding: 4rem 0 2rem; background: var(--bg-warm); border-top: 1px solid var(--line-strong); }
.footer-grid { display: grid; grid-template-columns: 1.4fr repeat(3, minmax(0, 1fr)); gap: 2.5rem; }
.footer-title { font-family: var(--display); font-weight: 800; font-size: 1.15rem; margin-bottom: 1rem; }
.footer-title span { color: var(--accent); }
.footer-copy,
.footer-col a,
.footer-col p,
.footer-address { color: var(--muted); font-size: .78rem; line-height: 1.75; font-style: normal; }
.footer-col h3 { font-family: var(--mono); font-size: .62rem; letter-spacing: .13em; text-transform: uppercase; color: var(--gold); margin: 0 0 .8rem; }
.footer-col a { display: block; padding: .25rem 0; }
.footer-col a:hover { color: var(--accent); }
.footer-bottom { margin-top: 3rem; padding-top: 1.25rem; border-top: 1px solid var(--line); display: flex; justify-content: space-between; gap: 1rem; color: var(--muted-2); font-family: var(--mono); font-size: .58rem; letter-spacing: .08em; text-transform: uppercase; }

.m-cta { display: none; }

:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; }

@media (max-width: 1050px) {
  .desktop-nav, .nav-actions { display: none; }
  .menu-button { display: inline-flex; position: relative; }
  .hero { grid-template-columns: 1fr; }
  .hero-copy { padding: 7rem 2rem 4.5rem; }
  .hero-media { min-height: 460px; border-left: 0; border-top: 1px solid var(--line-strong); }
  .fact-row { grid-template-columns: repeat(2, 1fr); }
  .fact:nth-child(2) { border-right: 0; }
  .fact:nth-child(-n+2) { border-bottom: 1px solid var(--line); }
  .section-head { grid-template-columns: 1fr; gap: 1.25rem; }
  .calculator { grid-template-columns: 1fr; }
  .calc-form { border-right: 0; border-bottom: 1px solid var(--line); }
  .footer-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (max-width: 720px) {
  :root { --header-h: 62px; }
  .site-header { padding: 0 1rem; }
  .container { width: min(100% - 2rem, var(--max)); }
  .hero-copy { padding: 6rem 1rem 3.5rem; }
  .hero h1 { font-size: clamp(2.55rem, 13vw, 4.2rem); }
  .hero-media { min-height: 340px; }
  .fact-row, .card-grid, .split, .field-grid { grid-template-columns: 1fr; }
  .fact { border-right: 0; border-bottom: 1px solid var(--line); }
  .fact:last-child { border-bottom: 0; }
  .section { padding: 4.5rem 0; }
  .calculator, .card { border-left: 0; border-right: 0; }
  .calc-form, .calc-result { padding: 1.5rem 1rem; }
  .cta-band { padding: 3.5rem 0 5rem; }
  .cta-band-inner { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
  .footer-bottom { flex-direction: column; }
  .m-cta {
    display: grid;
    position: fixed;
    z-index: 900;
    inset: auto 0 0;
    grid-template-columns: 1fr 1fr;
    border-top: 1px solid var(--line-strong);
  }
  .m-cta a {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 50px;
    padding-bottom: env(safe-area-inset-bottom);
    background: var(--surface);
    font-family: var(--mono);
    font-size: .64rem;
    letter-spacing: .08em;
    text-transform: uppercase;
  }
  .m-cta a:last-child { background: var(--accent); color: var(--bg); }
  body { padding-bottom: calc(50px + env(safe-area-inset-bottom)); }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: .01ms !important; transition-duration: .01ms !important; }
}