:root {
    --color-primary: #c2410c;
    --color-primary-strong: #9a3412;
    --color-secondary: #f97316;
    --color-accent: #1d4ed8;
    --color-accent-strong: #1e40af;
    --color-bg: #fffaf5;
    --color-surface: #ffffff;
    --color-soft: #fff1e6;
    --color-text: #0f172a;
    --color-muted: #475569;
    --color-border: #fed7aa;
    --color-dark: #172033;
    --color-success: #166534;
    --shadow-sm: 0 8px 24px rgba(120, 53, 15, .08);
    --shadow-lg: 0 24px 60px rgba(120, 53, 15, .14);
    --radius-sm: .75rem;
    --radius-md: 1.25rem;
    --radius-lg: 2rem;
    --container: 74rem;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 6rem; }
body { margin: 0; min-width: 20rem; background: var(--color-bg); color: var(--color-text); font-family: "Be Vietnam Pro", system-ui, sans-serif; font-size: 1rem; line-height: 1.65; }
body, button, input, textarea, select { font: inherit; }
img { max-width: 100%; height: auto; }
a { color: inherit; text-decoration-thickness: .08em; text-underline-offset: .18em; }
button, a { -webkit-tap-highlight-color: transparent; touch-action: manipulation; }
button { cursor: pointer; }
button:disabled { cursor: wait; opacity: .65; }
h1, h2, h3 { margin: 0 0 .85rem; line-height: 1.16; letter-spacing: -.035em; text-wrap: balance; }
h1 { font-size: clamp(2.35rem, 7vw, 5.4rem); }
h2 { font-size: clamp(1.8rem, 4vw, 3rem); }
h3 { font-size: clamp(1.15rem, 2vw, 1.4rem); }
p { margin: 0 0 1rem; }
.container { width: min(calc(100% - 2rem), var(--container)); margin-inline: auto; }
.narrow { max-width: 50rem; }
.section { padding: clamp(4.5rem, 8vw, 7.5rem) 0; }
.section-soft { background: var(--color-soft); }
.section-dark { background: var(--color-dark); color: #fff; }
.section-heading { max-width: 48rem; margin-bottom: 2.5rem; }
.section-heading p { color: var(--color-muted); }
.split-heading { max-width: none; display: flex; align-items: end; justify-content: space-between; gap: 2rem; }
.eyebrow { display: inline-block; margin-bottom: 1rem; color: var(--color-primary-strong); font-size: .78rem; font-weight: 800; letter-spacing: .14em; text-transform: uppercase; }
.section-dark .eyebrow { color: #fdba74; }
.lead { max-width: 48rem; color: var(--color-muted); font-size: clamp(1.05rem, 2vw, 1.3rem); }
.section-dark p { color: #cbd5e1; }
.skip-link { position: fixed; z-index: 1000; top: .5rem; left: .5rem; transform: translateY(-150%); padding: .75rem 1rem; border-radius: .5rem; background: #fff; color: #000; }
.skip-link:focus { transform: none; }
:focus-visible { outline: 3px solid #2563eb; outline-offset: 3px; }
.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0, 0, 0, 0); white-space: nowrap; border: 0; }
.honeypot { position: absolute !important; left: -9999px !important; }

.topbar { background: var(--color-dark); color: #e2e8f0; font-size: .78rem; }
.topbar-inner { min-height: 2.4rem; display: flex; align-items: center; justify-content: space-between; gap: 1rem; }
.site-header { position: sticky; z-index: 100; top: 0; border-bottom: 1px solid rgba(194, 65, 12, .1); background: rgba(255, 250, 245, .94); backdrop-filter: blur(16px); }
.header-inner { min-height: 5rem; display: flex; align-items: center; justify-content: space-between; gap: 2rem; }
.brand { min-width: 0; display: flex; align-items: center; gap: .75rem; color: var(--color-text); text-decoration: none; }
.brand > span:last-child { display: grid; }
.brand strong { max-width: 18rem; overflow: hidden; font-size: .95rem; text-overflow: ellipsis; white-space: nowrap; }
.brand small { max-width: 18rem; overflow: hidden; color: var(--color-muted); font-size: .68rem; text-overflow: ellipsis; white-space: nowrap; }
.brand-mark { flex: 0 0 auto; width: 2.6rem; height: 2.6rem; border: 6px solid var(--color-primary); border-top-color: #2563eb; border-radius: 50%; box-shadow: inset 0 0 0 4px #fff; }
.primary-nav { display: flex; align-items: center; gap: .15rem; }
.primary-nav a { min-height: 2.75rem; display: inline-flex; align-items: center; padding: .6rem .7rem; border-radius: .7rem; font-size: .85rem; font-weight: 600; text-decoration: none; transition: background-color .2s ease, color .2s ease; }
.primary-nav a:hover { background: #ffedd5; color: var(--color-primary-strong); }
.primary-nav .nav-cta { margin-left: .45rem; background: var(--color-primary); color: #fff; }
.primary-nav .nav-cta:hover { background: var(--color-primary-strong); color: #fff; }
.menu-toggle { width: 2.75rem; height: 2.75rem; display: none; place-content: center; gap: 4px; border: 1px solid var(--color-border); border-radius: .75rem; background: #fff; }
.menu-toggle span { width: 18px; height: 2px; background: var(--color-text); }

.hero { overflow: hidden; padding: clamp(4rem, 8vw, 8rem) 0; background: radial-gradient(circle at 90% 10%, rgba(249,115,22,.18), transparent 34%), linear-gradient(135deg, #fffaf5, #fff 55%, #eff6ff); }
.hero-grid { display: grid; grid-template-columns: 1.08fr .92fr; align-items: center; gap: clamp(3rem, 7vw, 7rem); }
.hero h1 { max-width: 15ch; font-size: clamp(2.7rem, 6.1vw, 5.2rem); }
.hero-copy .lead { max-width: 42rem; }
.button-row { display: flex; flex-wrap: wrap; gap: .75rem; margin-top: 2rem; }
.button { min-height: 3.25rem; display: inline-flex; align-items: center; justify-content: center; padding: .75rem 1.25rem; border: 1px solid transparent; border-radius: .85rem; font-weight: 700; text-decoration: none; transition: transform .2s ease, background-color .2s ease, box-shadow .2s ease; }
.button:hover { transform: translateY(-2px); }
.button:active { transform: translateY(0); }
.button-primary { background: var(--color-accent); color: #fff; box-shadow: 0 10px 26px rgba(37, 99, 235, .2); }
.button-primary:hover { background: var(--color-accent-strong); }
.button-secondary { border-color: #cbd5e1; background: #fff; color: var(--color-text); }
.button-light { background: #fff; color: var(--color-dark); }
.button-block { width: 100%; }
.trust-list { display: flex; flex-wrap: wrap; gap: .8rem 1.5rem; padding: 0; margin: 2rem 0 0; list-style: none; color: var(--color-muted); font-size: .86rem; }
.trust-list li::before { content: ""; width: .5rem; height: .5rem; display: inline-block; margin-right: .5rem; border-radius: 50%; background: var(--color-success); }

.thermal-card { position: relative; min-height: 31rem; display: grid; place-items: center; overflow: hidden; border: 1px solid rgba(249,115,22,.2); border-radius: var(--radius-lg); background: linear-gradient(160deg, #fff7ed, #fff 42%, #dbeafe); box-shadow: var(--shadow-lg); isolation: isolate; }
.thermal-card::before, .thermal-card::after { content: ""; position: absolute; border: 1px solid rgba(249,115,22,.25); border-radius: 50%; }
.thermal-card::before { width: 22rem; height: 22rem; top: -11rem; right: -7rem; box-shadow: 0 0 0 3rem rgba(249,115,22,.05), 0 0 0 6rem rgba(249,115,22,.03); }
.thermal-card::after { width: 18rem; height: 18rem; bottom: -10rem; left: -8rem; background: rgba(37,99,235,.06); }
.sun-core { position: absolute; top: 4.5rem; right: 4rem; width: 6.5rem; height: 6.5rem; display: grid; place-items: center; border-radius: 50%; background: #fb923c; color: #7c2d12; box-shadow: 0 0 0 1.25rem rgba(251,146,60,.15), 0 0 0 2.5rem rgba(251,146,60,.08); font-size: .7rem; font-weight: 800; letter-spacing: .12em; }
.thermal-surface { position: absolute; top: 47%; left: 8%; width: 84%; height: 4.5rem; transform: skewY(-7deg); border-top: 10px solid #f8fafc; border-radius: .6rem; background: linear-gradient(90deg, #94a3b8, #e2e8f0); box-shadow: 0 16px 0 #cbd5e1, 0 30px 40px rgba(15,23,42,.16); }
.thermal-surface span { position: absolute; top: -3rem; left: 1rem; transform: skewY(7deg); color: var(--color-primary-strong); font-size: .75rem; font-weight: 800; text-transform: uppercase; }
.thermal-result { position: absolute; right: 2rem; bottom: 2rem; left: 2rem; z-index: 1; padding: 1.2rem; border: 1px solid rgba(37,99,235,.15); border-radius: 1rem; background: rgba(255,255,255,.9); backdrop-filter: blur(10px); }
.thermal-result { display: grid; gap: .25rem; }
.thermal-result small { color: var(--color-muted); }

.feature-grid, .card-grid, .project-grid, .article-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.25rem; }
.feature-card { position: relative; min-height: 15rem; padding: 2rem; border: 1px solid var(--color-border); border-radius: var(--radius-md); background: #fff; box-shadow: var(--shadow-sm); }
.step-number { display: block; margin-bottom: 3rem; color: var(--color-secondary); font-size: .8rem; font-weight: 800; }
.service-card { overflow: hidden; border: 1px solid var(--color-border); border-radius: var(--radius-md); background: #fff; box-shadow: var(--shadow-sm); transition: transform .25s ease, box-shadow .25s ease; }
.service-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }
.card-visual { height: 10rem; position: relative; overflow: hidden; display: grid; place-items: center; }
.card-visual::before { content: ""; width: 11rem; height: 11rem; position: absolute; border: 2rem solid rgba(255,255,255,.26); border-radius: 50%; }
.card-visual span { position: relative; color: rgba(255,255,255,.95); font-size: 2.5rem; font-weight: 800; }
.visual-1 { background: linear-gradient(145deg, #c2410c, #fb923c); }
.visual-2 { background: linear-gradient(145deg, #1e40af, #60a5fa); }
.visual-3 { background: linear-gradient(145deg, #334155, #94a3b8); }
.card-body { padding: 1.5rem; }
.card-body h2 { font-size: 1.35rem; }
.card-body h3 a, .card-body h2 a, .project-card h3 a, .article-grid h3 a { text-decoration: none; }
.card-body p, .project-card p, .article-grid p { color: var(--color-muted); }
.text-link { color: var(--color-accent-strong); font-weight: 700; text-decoration: none; }
.tag { display: inline-flex; margin-bottom: .8rem; padding: .3rem .55rem; border-radius: 99px; background: #ffedd5; color: #9a3412; font-size: .7rem; font-weight: 800; letter-spacing: .04em; text-transform: uppercase; }

.process-list { display: grid; grid-template-columns: repeat(6, 1fr); padding: 0; margin: 0; list-style: none; }
.process-list li { position: relative; min-height: 13rem; padding: 1.5rem; border-top: 2px solid var(--color-border); }
.process-list li::before { content: counter(list-item, decimal-leading-zero); display: grid; width: 2.5rem; height: 2.5rem; place-items: center; margin: -2.85rem 0 1.5rem; border-radius: 50%; background: var(--color-primary); color: #fff; font-size: .75rem; font-weight: 800; }
.process-list strong, .process-list span { display: block; }
.process-list span { margin-top: .5rem; color: var(--color-muted); font-size: .85rem; }
.value-grid { display: grid; grid-template-columns: 1fr 1fr; align-items: center; gap: clamp(3rem, 8vw, 8rem); }
.value-list { margin: 0; }
.value-list div { display: grid; grid-template-columns: 8rem 1fr; gap: 1rem; padding: 1.2rem 0; border-bottom: 1px solid #334155; }
.value-list dt { color: #fdba74; font-weight: 800; }
.value-list dd { margin: 0; color: #e2e8f0; }

.project-card, .article-grid article { min-height: 14rem; padding: 1.6rem; border: 1px solid var(--color-border); border-radius: var(--radius-md); background: #fff; }
.project-card dl, .project-facts { margin: 1.2rem 0 0; }
.project-card dl div, .project-facts div { display: grid; grid-template-columns: 6rem 1fr; gap: 1rem; padding: .65rem 0; border-top: 1px solid #e2e8f0; }
.project-card dt, .project-facts dt { color: var(--color-muted); font-size: .78rem; font-weight: 700; text-transform: uppercase; }
.project-card dd, .project-facts dd { margin: 0; }
.content-note { max-width: 55rem; margin-top: 1.5rem; padding-left: 1rem; border-left: 3px solid var(--color-primary); color: var(--color-muted); font-size: .85rem; }
.two-columns { display: grid; grid-template-columns: 1.25fr .75fr; gap: clamp(2rem, 6vw, 6rem); }
.faq-list { display: grid; gap: .65rem; }
.faq-list details { border: 1px solid var(--color-border); border-radius: 1rem; background: #fff; }
.faq-list summary { min-height: 3.5rem; display: flex; align-items: center; justify-content: space-between; gap: 1rem; padding: .9rem 1.1rem; cursor: pointer; font-weight: 700; list-style: none; }
.faq-list summary::after { content: "+"; color: var(--color-primary); font-size: 1.5rem; }
.faq-list details[open] summary::after { content: "−"; }
.faq-list summary::-webkit-details-marker { display: none; }
.faq-list details p { padding: 0 1.1rem 1.1rem; color: var(--color-muted); }
.quote-card { align-self: start; padding: 2rem; border-radius: var(--radius-lg); background: var(--color-dark); color: #fff; box-shadow: var(--shadow-lg); }
.quote-card p, .quote-card small { color: #cbd5e1; }
.quote-card small { display: block; margin-top: 1rem; }

.page-hero, .article-hero { padding: clamp(4rem, 8vw, 7rem) 0; border-bottom: 1px solid var(--color-border); background: radial-gradient(circle at 85% 20%, rgba(249,115,22,.15), transparent 30%), #fffaf5; }
.page-hero h1, .article-hero h1 { font-size: clamp(2.4rem, 5vw, 4.5rem); }
.article-shell { max-width: 62rem; }
.breadcrumbs { display: flex; flex-wrap: wrap; gap: .4rem; margin-bottom: 2rem; color: var(--color-muted); font-size: .8rem; }
.breadcrumbs a { color: var(--color-accent-strong); }
.article-meta { margin-top: 1.5rem; color: var(--color-muted); font-size: .82rem; }
.article-layout { display: grid; grid-template-columns: minmax(0, 1fr) 18rem; gap: 4rem; }
.prose { max-width: 48rem; }
.prose h2 { margin-top: 3rem; font-size: clamp(1.65rem, 3vw, 2.25rem); }
.prose h3 { margin-top: 2rem; }
.prose p, .prose li { color: #334155; }
.prose a { color: var(--color-accent-strong); }
.prose img { border-radius: 1rem; }
.prose table { width: 100%; border-collapse: collapse; margin: 1.5rem 0; background: #fff; }
.prose th, .prose td { padding: .8rem; border: 1px solid #cbd5e1; text-align: left; }
.prose blockquote { margin: 1.5rem 0; padding: 1rem 1.2rem; border-left: 4px solid var(--color-primary); background: var(--color-soft); }
.direct-answer { margin-bottom: 2rem; padding: 1.5rem; border: 1px solid #bfdbfe; border-radius: 1rem; background: #eff6ff; }
.direct-answer strong { color: var(--color-accent-strong); }
.direct-answer p { margin: .5rem 0 0; color: var(--color-text); font-size: 1.06rem; }
.article-aside { min-width: 0; }
.toc { position: sticky; top: 7rem; padding: 1.25rem; border: 1px solid var(--color-border); border-radius: 1rem; background: #fff; }
.toc ol { padding-left: 1.15rem; margin: .8rem 0 0; }
.toc li { margin: .55rem 0; color: var(--color-muted); font-size: .8rem; }
.toc li.h3 { margin-left: .75rem; }
.toc a { text-decoration: none; }
.contact-mini { display: grid; gap: .35rem; margin-top: 1rem; padding: 1.25rem; border-radius: 1rem; background: var(--color-dark); color: #fff; }
.contact-mini span { color: #cbd5e1; font-size: .78rem; }
.contact-mini a { color: #fdba74; font-weight: 800; }
.article-cta { display: flex; align-items: center; justify-content: space-between; gap: 2rem; margin: 3rem 0; padding: 2rem; border-radius: var(--radius-md); background: var(--color-soft); }
.article-cta h2 { margin-top: 0; font-size: 1.6rem; }
.related-list { display: grid; gap: .75rem; }
.related-list a { display: grid; padding: 1rem; border: 1px solid var(--color-border); border-radius: .8rem; background: #fff; text-decoration: none; }
.related-list span { color: var(--color-muted); font-size: .85rem; }
.contact-map { width: 100%; max-width: 100%; margin-top: 1.5rem; border: 0; border-radius: 1rem; }

.form-layout { display: grid; grid-template-columns: minmax(0, 1fr) 22rem; gap: 4rem; align-items: start; }
.quote-form { position: relative; padding: clamp(1.2rem, 4vw, 2.5rem); border: 1px solid var(--color-border); border-radius: var(--radius-md); background: #fff; box-shadow: var(--shadow-sm); }
.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 1.2rem; }
.quote-form label { display: grid; gap: .4rem; margin-bottom: 1.2rem; font-weight: 700; }
.quote-form label small { color: var(--color-muted); font-size: .72rem; font-weight: 400; }
.quote-form input, .quote-form select, .quote-form textarea, .search-form input { width: 100%; min-height: 3rem; padding: .7rem .8rem; border: 1px solid #94a3b8; border-radius: .65rem; background: #fff; color: var(--color-text); }
.quote-form textarea { resize: vertical; }
.quote-form .consent { grid-template-columns: auto 1fr; align-items: start; font-weight: 400; }
.consent input { width: 1.2rem; min-height: 1.2rem; margin-top: .2rem; }
.contact-panel { padding: 1.5rem; border-radius: var(--radius-md); background: var(--color-dark); color: #fff; }
.contact-panel dl { margin: 1rem 0 0; }
.contact-panel dl div { padding: .8rem 0; border-top: 1px solid #334155; }
.contact-panel dt { color: #94a3b8; font-size: .72rem; text-transform: uppercase; }
.contact-panel dd { margin: .25rem 0 0; }
.search-form { display: flex; gap: .75rem; margin-top: 2rem; }
.search-results { display: grid; gap: .8rem; margin-top: 2rem; }
.search-results > a { display: grid; padding: 1.2rem; border: 1px solid var(--color-border); border-radius: 1rem; background: #fff; text-decoration: none; }
.search-results strong { font-size: 1.1rem; }
.search-results small { color: var(--color-muted); }
.empty-state, .status-page { text-align: center; }
.empty-state { padding: 4rem 1rem; border: 1px dashed #cbd5e1; border-radius: var(--radius-md); }
.status-page { min-height: 65vh; display: grid; place-items: center; padding: 5rem 0; }
.status-page .button-row { justify-content: center; }
.status-mark { width: 5rem; height: 5rem; display: block; margin: 0 auto 2rem; border: .7rem solid #bbf7d0; border-top-color: #16a34a; border-radius: 50%; }
.sitemap-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 2rem; }
.sitemap-grid section { padding: 1.5rem; border: 1px solid var(--color-border); border-radius: 1rem; background: #fff; }
.sitemap-grid ul { padding-left: 1.2rem; }

.alert { margin-top: 1rem; padding: .9rem 1rem; border-radius: .75rem; }
.alert-success { border: 1px solid #86efac; background: #f0fdf4; color: #14532d; }
.alert-error { border: 1px solid #fecaca; background: #fef2f2; color: #991b1b; }
.site-footer { padding: 4rem 0 6rem; background: #0f172a; color: #fff; }
.footer-grid { display: grid; grid-template-columns: 1.2fr 1fr 1fr; gap: 3rem; }
.site-footer h2 { font-size: 1.1rem; }
.site-footer p, .site-footer li { color: #cbd5e1; font-size: .85rem; }
.footer-links { padding: 0; margin: 0; list-style: none; }
.footer-links li { margin: .5rem 0; }
.footer-links a { color: #fff; }
.footer-bottom { margin-top: 3rem; padding-top: 1.5rem; border-top: 1px solid #334155; color: #94a3b8; font-size: .75rem; }
.mobile-cta { display: none; }

@media (max-width: 64rem) {
    .menu-toggle { display: grid; }
    .primary-nav { position: absolute; top: 100%; right: 1rem; left: 1rem; display: none; padding: .75rem; border: 1px solid var(--color-border); border-radius: 1rem; background: #fff; box-shadow: var(--shadow-lg); }
    .primary-nav.is-open { display: grid; }
    .primary-nav a { padding-inline: 1rem; }
    .primary-nav .nav-cta { margin: .25rem 0 0; justify-content: center; }
    .hero-grid { grid-template-columns: 1fr; }
    .thermal-card { min-height: 24rem; }
    .process-list { grid-template-columns: repeat(3, 1fr); gap: 3rem 0; }
    .article-layout { grid-template-columns: 1fr; }
    .article-aside { display: none; }
}

@media (max-width: 48rem) {
    body { padding-bottom: 4rem; }
    .topbar-inner { min-height: 2rem; justify-content: center; }
    .topbar-inner span:last-child { display: none; }
    .brand strong, .brand small { max-width: 12rem; }
    .hero { padding-top: 3.5rem; }
    .thermal-card { min-height: 21rem; }
    .sun-core { top: 3.5rem; right: 2.5rem; width: 5rem; height: 5rem; }
    .feature-grid, .card-grid, .project-grid, .article-grid, .two-columns, .value-grid, .form-layout, .footer-grid, .sitemap-grid { grid-template-columns: 1fr; }
    .process-list { grid-template-columns: 1fr; gap: 1.5rem; }
    .process-list li { min-height: auto; padding: 1rem 1rem 1rem 4rem; border-top: 0; border-left: 2px solid var(--color-border); }
    .process-list li::before { position: absolute; top: .5rem; left: -1.3rem; margin: 0; }
    .split-heading { align-items: start; flex-direction: column; gap: .5rem; }
    .article-cta { align-items: start; flex-direction: column; }
    .form-grid { grid-template-columns: 1fr; gap: 0; }
    .search-form { align-items: stretch; flex-direction: column; }
    .mobile-cta { position: fixed; z-index: 200; right: 0; bottom: 0; left: 0; display: grid; grid-template-columns: repeat(3, 1fr); min-height: 4rem; padding-bottom: env(safe-area-inset-bottom); border-top: 1px solid #cbd5e1; background: #fff; box-shadow: 0 -10px 30px rgba(15,23,42,.12); }
    .mobile-cta a { min-height: 4rem; display: grid; place-items: center; border-right: 1px solid #e2e8f0; color: var(--color-accent-strong); font-size: .8rem; font-weight: 800; text-decoration: none; }
    .mobile-cta a:last-child { border: 0; background: var(--color-primary); color: #fff; }
}

@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after { scroll-behavior: auto !important; transition-duration: .01ms !important; animation-duration: .01ms !important; animation-iteration-count: 1 !important; }
}