:root {
    --ink: #101412;
    --ink-soft: #19201c;
    --paper: #f5f5ef;
    --white: #ffffff;
    --lime: #b9f227;
    --lime-dark: #8fbe13;
    --muted: #677068;
    --line: #d9ded7;
    --max: 1180px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
    margin: 0;
    background: var(--paper);
    color: var(--ink);
    font-family: Arial, Helvetica, sans-serif;
    line-height: 1.6;
}
a { color: inherit; }
img { max-width: 100%; display: block; }
.container { width: min(calc(100% - 40px), var(--max)); margin-inline: auto; }
.narrow { max-width: 820px; }
.sr-only { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0,0,0,0); }

.utility-bar { background: var(--lime); color: var(--ink); font-size: .84rem; font-weight: bold; }
.utility-inner { min-height: 34px; display: flex; align-items: center; justify-content: space-between; gap: 20px; }
.utility-inner a { text-decoration: none; }

.site-header { background: rgba(16,20,18,.97); color: var(--white); position: sticky; top: 0; z-index: 50; }
.nav-wrap { min-height: 84px; display: flex; align-items: center; justify-content: space-between; gap: 24px; }
.brand { display: inline-flex; align-items: center; gap: 12px; color: var(--white); text-decoration: none; }
.brand-copy { display: grid; line-height: 1.05; }
.brand-copy strong { letter-spacing: .06em; }
.brand-copy small { margin-top: 6px; color: #bac3bc; font-size: .68rem; }
.brand-mark { position: relative; width: 44px; height: 38px; display: block; }
.house-roof { position: absolute; left: 4px; top: 10px; width: 34px; height: 24px; border-left: 4px solid var(--lime); border-top: 4px solid var(--lime); transform: rotate(45deg); border-radius: 2px; }
.brand-dot { position: absolute; left: 18px; top: 17px; width: 10px; height: 10px; background: var(--lime); border-radius: 50%; }

.main-nav { display: flex; align-items: center; gap: 22px; }
.main-nav a { color: #e8eee9; text-decoration: none; font-size: .92rem; }
.main-nav a:hover, .main-nav a.active { color: var(--lime); }
.main-nav .nav-cta { padding: 11px 18px; background: var(--lime); color: var(--ink); border-radius: 7px; font-weight: bold; }
.menu-toggle { display: none; background: transparent; border: 0; padding: 8px; }
.menu-toggle span:not(.sr-only) { display: block; width: 28px; height: 3px; margin: 5px 0; background: var(--white); }

.hero {
    overflow: hidden;
    background:
        radial-gradient(circle at 80% 25%, rgba(185,242,39,.14), transparent 25%),
        linear-gradient(115deg, #0e1210 0%, #171e1a 70%, #101412 100%);
    color: var(--white);
}
.hero-grid { min-height: 650px; display: grid; grid-template-columns: 1.05fr .95fr; align-items: center; gap: 60px; padding-block: 80px; }
.eyebrow { display: inline-block; color: var(--lime-dark); font-weight: bold; text-transform: uppercase; letter-spacing: .12em; font-size: .76rem; }
.hero .eyebrow, .section-dark .eyebrow, .cta-section .eyebrow { color: var(--lime); }
h1, h2, h3 { margin-top: 0; line-height: 1.08; }
h1 { font-size: clamp(2.8rem, 6vw, 5.5rem); margin-bottom: 24px; max-width: 850px; letter-spacing: -.04em; }
h2 { font-size: clamp(2rem, 4vw, 3.5rem); margin-bottom: 18px; letter-spacing: -.03em; }
h3 { font-size: 1.35rem; margin-bottom: 10px; }
.hero-lead { max-width: 650px; color: #d5ddd7; font-size: 1.15rem; }
.hero-actions, .page-actions, .cta-actions { display: flex; align-items: center; flex-wrap: wrap; gap: 14px; margin-top: 32px; }
.button { display: inline-flex; align-items: center; justify-content: center; min-height: 48px; padding: 12px 22px; border: 2px solid transparent; border-radius: 7px; text-decoration: none; font-weight: bold; cursor: pointer; font-size: .95rem; }
.button-primary { background: var(--lime); color: var(--ink); }
.button-primary:hover { background: #c8ff3d; }
.button-secondary { border-color: #778078; color: var(--white); background: transparent; }
.button-dark { background: var(--ink); color: var(--white); }
.dark-outline { color: var(--ink); border-color: var(--ink); }
.trust-row { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 35px; }
.trust-row span { border: 1px solid #39433d; border-radius: 999px; padding: 7px 12px; color: #cbd3cd; font-size: .82rem; }

.hero-visual { position: relative; min-height: 470px; }
.visual-glow { position: absolute; inset: 12% 8% 14%; border-radius: 50%; background: rgba(185,242,39,.12); filter: blur(25px); }
.house-scene { position: absolute; left: 8%; right: 8%; top: 16%; bottom: 12%; }
.house-body { position: absolute; left: 15%; right: 8%; bottom: 12%; height: 58%; background: #2c352f; border: 1px solid #56615a; border-radius: 4px; }
.house-roof-large { position: absolute; left: 9%; right: 2%; top: 6%; height: 42%; background: #222a25; transform: skewY(-16deg); border-top: 3px solid #657168; }
.window { position: absolute; top: 25%; width: 20%; height: 28%; background: rgba(185,242,39,.5); border: 4px solid #151a17; }
.window-one { left: 15%; }
.window-two { left: 43%; }
.door { position: absolute; right: 10%; bottom: 0; width: 18%; height: 56%; background: #151a17; border: 2px solid #5f6a62; }
.mitigation-pipe { position: absolute; right: -7%; bottom: 8%; width: 18px; height: 120%; background: #dce3dd; border-radius: 10px; }
.fan-unit { position: absolute; right: -11%; top: 3%; width: 48px; height: 74px; background: #e7ece8; border-radius: 20px; }
.ground-line { position: absolute; left: 2%; right: 0; bottom: 10%; height: 3px; background: #727d75; }
.radon-particles i { position: absolute; width: 11px; height: 11px; border-radius: 50%; background: var(--lime); opacity: .8; }
.radon-particles i:nth-child(1) { left: 4%; bottom: 6%; }
.radon-particles i:nth-child(2) { left: 22%; bottom: 2%; }
.radon-particles i:nth-child(3) { left: 42%; bottom: 8%; }
.radon-particles i:nth-child(4) { left: 60%; bottom: 3%; }
.radon-particles i:nth-child(5) { left: 78%; bottom: 7%; }
.visual-badge { position: absolute; left: 0; bottom: 0; max-width: 280px; background: var(--white); color: var(--ink); padding: 18px 20px; border-left: 5px solid var(--lime); border-radius: 4px; }
.visual-badge strong, .visual-badge span { display: block; }
.visual-badge span { color: var(--muted); font-size: .85rem; margin-top: 3px; }

.proof-strip { background: var(--white); border-bottom: 1px solid var(--line); }
.proof-grid { display: grid; grid-template-columns: repeat(4, 1fr); }
.proof-grid div { padding: 24px 20px; border-right: 1px solid var(--line); }
.proof-grid div:last-child { border-right: 0; }
.proof-grid strong, .proof-grid span { display: block; }
.proof-grid strong { font-size: 1.25rem; }
.proof-grid span { color: var(--muted); font-size: .86rem; }

.section { padding-block: 90px; }
.section-heading { margin-bottom: 44px; }
.section-heading.centered { text-align: center; max-width: 780px; margin-inline: auto; margin-bottom: 44px; }
.section-heading p { color: var(--muted); }
.card-grid { display: grid; gap: 24px; }
.card-grid.three { grid-template-columns: repeat(3, 1fr); }
.service-card, .product-card { background: var(--white); border: 1px solid var(--line); padding: 30px; border-radius: 10px; }
.service-card.featured { background: var(--ink); color: var(--white); border-color: var(--ink); }
.service-card p, .product-card p { color: var(--muted); }
.service-card.featured p { color: #cbd3cd; }
.service-card a { color: var(--lime-dark); font-weight: bold; text-decoration: none; }
.icon-box { display: inline-grid; place-items: center; width: 46px; height: 46px; margin-bottom: 25px; background: var(--lime); color: var(--ink); border-radius: 8px; font-weight: bold; }

.section-dark { background: var(--ink); color: var(--white); }
.split-section { display: grid; grid-template-columns: 1fr 1fr; gap: 80px; align-items: center; }
.section-dark p { color: #cbd3cd; }
.check-list { list-style: none; padding: 0; margin: 28px 0 34px; }
.check-list li { position: relative; padding-left: 30px; margin: 12px 0; }
.check-list li::before { content: '✓'; position: absolute; left: 0; color: var(--lime); font-weight: bold; }
.process-panel { border: 1px solid #37413b; border-radius: 12px; padding: 30px; }
.process-step { display: grid; grid-template-columns: 52px 1fr; gap: 18px; padding: 24px 0; border-bottom: 1px solid #37413b; }
.process-step:last-child { border-bottom: 0; }
.process-step > span { width: 42px; height: 42px; display: grid; place-items: center; border-radius: 50%; background: var(--lime); color: var(--ink); font-weight: bold; }
.process-step p { margin: 4px 0 0; }

.realtor-banner { background: var(--lime); padding: 45px; border-radius: 12px; display: flex; align-items: center; justify-content: space-between; gap: 40px; }
.realtor-banner p { max-width: 720px; margin-bottom: 0; }
.realtor-banner .eyebrow { color: var(--ink); }

.cta-section { background: #202923; color: var(--white); padding-block: 60px; }
.cta-inner { display: flex; align-items: center; justify-content: space-between; gap: 40px; }
.cta-inner h2 { margin-bottom: 0; }
.text-link { color: var(--lime); font-size: 1.1rem; font-weight: bold; text-decoration: none; }

.page-hero { padding-block: 100px 70px; background: var(--ink); color: var(--white); }
.page-hero h1 { font-size: clamp(2.7rem, 5vw, 4.7rem); }
.page-hero p { color: #cbd3cd; font-size: 1.1rem; }
.placeholder-box, .paypal-placeholder { border: 2px dashed #aeb7b0; border-radius: 10px; padding: 28px; background: var(--white); }
.product-image { aspect-ratio: 4 / 3; margin-bottom: 24px; border-radius: 8px; }
.placeholder-image { display: grid; place-items: center; background: #e5e9e4; color: #748078; font-weight: bold; }
.product-meta { display: grid; gap: 2px; margin: 24px 0; }
.product-meta strong { font-size: 1.4rem; }
.product-meta span { color: var(--muted); font-size: .85rem; }
.paypal-placeholder { padding: 18px; text-align: center; background: #fff8dc; border-color: #d6b94c; font-size: .86rem; }

.contact-form { display: grid; gap: 22px; }
.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.contact-form label { display: grid; gap: 7px; font-weight: bold; }
.contact-form input, .contact-form textarea { width: 100%; border: 1px solid #b9c1bb; border-radius: 7px; padding: 13px 14px; font: inherit; background: var(--white); }
.honeypot { position: absolute; left: -9999px; }

.site-footer { background: #0b0e0c; color: #cbd3cd; padding-top: 65px; }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr; gap: 60px; }
.footer-grid h3 { color: var(--white); font-size: 1rem; }
.footer-grid a { display: block; color: #cbd3cd; text-decoration: none; margin: 9px 0; }
.footer-brand { color: var(--lime); font-weight: bold; letter-spacing: .08em; }
.footer-bottom { margin-top: 55px; padding-block: 20px; border-top: 1px solid #28302b; display: flex; justify-content: space-between; gap: 20px; font-size: .82rem; }

@media (max-width: 900px) {
    .menu-toggle { display: block; }
    .main-nav { display: none; position: absolute; left: 0; right: 0; top: 118px; background: var(--ink); padding: 24px 20px 30px; flex-direction: column; align-items: stretch; gap: 10px; border-top: 1px solid #343e38; }
    .main-nav.open { display: flex; }
    .main-nav a { padding: 10px; }
    .hero-grid, .split-section { grid-template-columns: 1fr; }
    .hero-grid { padding-block: 65px; }
    .hero-visual { min-height: 390px; }
    .card-grid.three { grid-template-columns: 1fr; }
    .proof-grid { grid-template-columns: repeat(2, 1fr); }
    .proof-grid div:nth-child(2) { border-right: 0; }
    .realtor-banner, .cta-inner { align-items: flex-start; flex-direction: column; }
    .footer-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 600px) {
    .container { width: min(calc(100% - 28px), var(--max)); }
    .utility-inner span { display: none; }
    .utility-inner { justify-content: flex-end; }
    .brand-copy small { display: none; }
    h1 { font-size: 2.65rem; }
    .hero-grid { min-height: auto; }
    .hero-visual { min-height: 330px; }
    .proof-grid { grid-template-columns: 1fr; }
    .proof-grid div { border-right: 0; border-bottom: 1px solid var(--line); }
    .section { padding-block: 65px; }
    .realtor-banner { padding: 28px; }
    .form-grid, .footer-grid { grid-template-columns: 1fr; }
    .footer-bottom { flex-direction: column; }
}