:root {
    --green: #568d17;
    --green-dark: #315d08;
    --green-soft: #eef5e7;
    --ink: #111711;
    --muted: #626b62;
    --line: #dfe5da;
    --surface: #f5f7f2;
    --white: #fff;
    --footer: #0c160e;
    --shadow: 0 24px 60px rgba(24, 45, 17, .12);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; color: var(--ink); background: var(--surface); font-family: Arial, Helvetica, sans-serif; -webkit-font-smoothing: antialiased; }
img { max-width: 100%; display: block; }
a { color: inherit; }
button, input, select, textarea { font: inherit; }
button { cursor: pointer; }

.shell { width: min(1180px, calc(100% - 40px)); margin-inline: auto; }
.shell-wide { width: min(1536px, calc(100% - 14px)); margin-inline: auto; }
.visually-hidden { position: absolute !important; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0,0,0,0); white-space: nowrap; border: 0; }
.skip-link { position: fixed; z-index: 9999; top: 8px; left: 8px; padding: 10px 14px; color: #fff; background: #111; transform: translateY(-150%); }
.skip-link:focus { transform: translateY(0); }

.topbar { color: rgba(255,255,255,.78); background: var(--footer); font-size: .76rem; }
.topbar-inner { min-height: 34px; display: flex; align-items: center; justify-content: space-between; gap: 24px; }
.topbar-contact { display: flex; gap: 28px; }
.topbar-contact a { text-decoration: none; }
.topbar-contact a:hover { color: #a7d469; }
.topbar-tagline { color: rgba(255,255,255,.5); letter-spacing: .08em; text-transform: uppercase; }

.site-header { position: sticky; z-index: 1000; top: 0; background: rgba(255,255,255,.97); border-bottom: 1px solid rgba(17,23,17,.08); box-shadow: 0 8px 30px rgba(29,49,21,.05); backdrop-filter: blur(16px); }
.navigation-wrap { min-height: 82px; display: flex; align-items: center; justify-content: space-between; gap: 30px; }
.brand { display: inline-flex; align-items: center; gap: 11px; text-decoration: none; }
.brand img { width: 56px; height: 56px; }
.brand-copy { display: flex; flex-direction: column; line-height: 1; }
.brand-copy > span { font-size: 1.03rem; font-weight: 700; }
.brand-copy strong { color: var(--green-dark); letter-spacing: .08em; }
.brand-copy small { margin-top: 7px; color: #737c73; font-size: .61rem; font-weight: 700; letter-spacing: .08em; text-transform: uppercase; }
.main-nav { display: flex; align-items: center; gap: 4px; }
.main-nav > a, .nav-dropdown-toggle { position: relative; padding: 15px 13px; color: #242b24; background: none; border: 0; text-decoration: none; font-size: .89rem; font-weight: 700; }
.main-nav > a:not(.header-cta)::after, .nav-dropdown-toggle::after { content: ''; position: absolute; left: 13px; right: 13px; bottom: 7px; height: 2px; background: var(--green); transform: scaleX(0); transform-origin: left; transition: .2s; }
.main-nav > a:hover, .main-nav > a.active, .nav-dropdown-toggle:hover, .nav-dropdown-toggle.active { color: var(--green-dark); }
.main-nav > a:hover::after, .main-nav > a.active::after, .nav-dropdown-toggle:hover::after, .nav-dropdown-toggle.active::after { transform: scaleX(1); }
.nav-dropdown { position: relative; }
.nav-dropdown-menu { position: absolute; top: calc(100% + 10px); left: 0; width: 310px; padding: 10px; background: #fff; border: 1px solid var(--line); box-shadow: var(--shadow); opacity: 0; visibility: hidden; transform: translateY(8px); transition: .2s; }
.nav-dropdown:hover .nav-dropdown-menu, .nav-dropdown:focus-within .nav-dropdown-menu { opacity: 1; visibility: visible; transform: none; }
.nav-dropdown-menu a { display: block; padding: 12px; color: #293129; text-decoration: none; font-size: .85rem; font-weight: 600; }
.nav-dropdown-menu a:hover { color: var(--green-dark); background: var(--green-soft); }
.header-cta { margin-left: 10px; color: #fff !important; background: linear-gradient(135deg,#659c1f,#3f710c); box-shadow: 0 10px 24px rgba(66,114,15,.18); }
.header-cta::after { display: none; }
.header-cta:hover { transform: translateY(-2px); }
.menu-toggle { display: none; width: 45px; height: 42px; padding: 8px 10px; background: #fff; border: 1px solid var(--line); }
.menu-toggle span:not(.visually-hidden) { display: block; height: 2px; margin: 5px 0; background: var(--green-dark); }

.home-showcase { display: grid; grid-template-columns: minmax(0,58.3fr) minmax(260px,22.7fr) minmax(275px,19fr); grid-template-rows: 244px 260px 236px; grid-template-areas: 'hero city services' 'hero engineering services' 'features sustainable services'; gap: 8px; padding-top: 7px; }
.mosaic-card { position: relative; overflow: hidden; background: #e6ebe2; }
.mosaic-card img { width: 100%; height: 100%; object-fit: cover; transition: transform .5s; }
.mosaic-card:hover img { transform: scale(1.025); }
.mosaic-hero { grid-area: hero; }
.mosaic-city { grid-area: city; }
.mosaic-engineering { grid-area: engineering; }
.mosaic-sustainable { grid-area: sustainable; }
.image-badge { position: absolute; left: 18px; top: 18px; padding: 8px 11px; color: #fff; background: rgba(4,18,9,.72); font-size: .72rem; font-weight: 700; letter-spacing: .04em; text-transform: uppercase; }
.strengths-panel { grid-area: features; display: grid; grid-template-columns: repeat(4,minmax(0,1fr)); background: #fff; }
.strengths-panel article { position: relative; display: flex; flex-direction: column; align-items: center; justify-content: center; padding: 22px 18px; text-align: center; }
.strengths-panel article:not(:last-child)::after { content: ''; position: absolute; top: 18%; right: 0; width: 1px; height: 64%; background: var(--line); }
.line-icon { width: 56px; height: 56px; display: grid; place-items: center; margin-bottom: 12px; color: var(--green); font-size: 2rem; }
.strengths-panel h2 { margin: 0 0 8px; font-size: .93rem; }
.strengths-panel p { margin: 0; color: var(--muted); font-size: .78rem; line-height: 1.6; }
.home-services-panel { grid-area: services; display: grid; grid-template-rows: repeat(3,1fr); background: #fff; }
.home-services-panel article { display: flex; flex-direction: column; justify-content: center; padding: 32px 33px; border-bottom: 1px solid var(--line); }
.home-services-panel article:last-child { border-bottom: 0; }
.service-symbol { color: var(--green); font-size: 2.1rem; }
.home-services-panel h2 { margin: 13px 0 9px; font-size: 1rem; }
.home-services-panel p { margin: 0 0 18px; color: var(--muted); font-size: .82rem; line-height: 1.65; }
.home-services-panel a { color: var(--green); text-decoration: none; font-size: .82rem; font-weight: 800; }
.sector-strip { display: grid; grid-template-columns: repeat(4, minmax(0,1fr)); gap: 10px; margin-top: 10px; }
.sector-strip a { position: relative; overflow: hidden; aspect-ratio: 1.53/1; min-height: 250px; background: #dfe5da; }
.sector-strip img { width: 100%; height: 100%; object-fit: cover; transition: transform .45s; }
.sector-strip a:hover img { transform: scale(1.025); }

.content-section { padding: 96px 0; background: #fff; }
.muted-section { background: var(--surface); }
.split-layout { display: grid; grid-template-columns: 1fr 1fr; gap: 90px; align-items: center; }
.align-start { align-items: start; }
.eyebrow { margin: 0 0 16px; color: var(--green); font-size: .75rem; font-weight: 800; letter-spacing: .13em; text-transform: uppercase; }
.display-heading { margin: 0; max-width: 620px; font-size: clamp(2.25rem,4.2vw,4.4rem); line-height: 1.06; letter-spacing: -.045em; }
.prose-large { color: #3f493f; font-size: 1.07rem; line-height: 1.85; }
.prose-large p { margin-top: 0; }
.text-link { display: inline-flex; gap: 10px; color: var(--green-dark); text-decoration: none; font-weight: 800; }
.text-link:hover { color: var(--green); }

.page-hero { position: relative; min-height: 490px; display: grid; align-items: end; color: #fff; background-image: linear-gradient(90deg,rgba(5,18,8,.86),rgba(5,18,8,.48) 53%,rgba(5,18,8,.18)), var(--page-hero-image); background-size: cover; background-position: center; }
.page-hero::after { content: ''; position: absolute; inset: auto 0 0; height: 150px; background: linear-gradient(transparent,rgba(3,10,5,.35)); }
.page-hero-inner { position: relative; z-index: 1; padding-top: 110px; padding-bottom: 70px; }
.page-hero .eyebrow { color: #acd477; }
.page-hero h1 { max-width: 880px; margin: 0 0 22px; font-size: clamp(2.8rem,5.7vw,5.8rem); line-height: 1; letter-spacing: -.055em; }
.page-hero p:last-child { max-width: 700px; margin: 0; color: rgba(255,255,255,.84); font-size: 1.12rem; line-height: 1.7; }

.image-story-section { padding: 0 0 96px; background: #fff; }
.image-story-grid { display: grid; grid-template-columns: 1.08fr .92fr; min-height: 600px; }
.image-story-grid figure { margin: 0; }
.image-story-grid img { width: 100%; height: 100%; object-fit: cover; }
.story-card { padding: 70px; display: flex; flex-direction: column; justify-content: center; color: #fff; background: var(--footer); }
.story-card h2 { margin: 0 0 20px; font-size: clamp(2rem,3.4vw,3.5rem); line-height: 1.1; }
.story-card > p:not(.eyebrow) { color: rgba(255,255,255,.7); line-height: 1.8; }
.check-list { list-style: none; padding: 0; margin: 24px 0 0; }
.check-list li { position: relative; padding: 12px 0 12px 32px; border-bottom: 1px solid rgba(255,255,255,.12); line-height: 1.5; }
.check-list li::before { content: '✓'; position: absolute; left: 0; color: #96c65d; font-weight: 900; }
.section-heading.centered { max-width: 760px; margin: 0 auto 52px; text-align: center; }
.value-grid { display: grid; grid-template-columns: repeat(4,1fr); gap: 16px; }
.value-grid article { padding: 34px; background: #fff; border: 1px solid var(--line); }
.value-grid span, .service-number { color: var(--green); font-size: .75rem; font-weight: 800; letter-spacing: .12em; }
.value-grid h3 { margin: 36px 0 12px; font-size: 1.22rem; }
.value-grid p { color: var(--muted); font-size: .9rem; line-height: 1.7; }
.cta-band { padding: 70px 0; color: #fff; background: linear-gradient(135deg,var(--green-dark),#4c7c12); }
.cta-band-inner { display: flex; align-items: center; justify-content: space-between; gap: 50px; }
.cta-band .eyebrow { color: #c7e5a2; }
.cta-band h2 { margin: 0; max-width: 760px; font-size: clamp(2rem,4vw,4rem); line-height: 1.08; }

.services-list-section { padding: 10px 0 96px; background: #fff; }
.services-list { display: grid; gap: 18px; }
.service-row { min-height: 450px; display: grid; grid-template-columns: 1fr 1fr; background: var(--surface); }
.service-row.reverse img { order: 2; }
.service-row > img { width: 100%; height: 100%; object-fit: cover; }
.service-row > div { display: flex; flex-direction: column; justify-content: center; padding: 64px; }
.service-row h2 { margin: 20px 0 16px; font-size: clamp(2rem,3vw,3.2rem); line-height: 1.12; }
.service-row p { color: var(--muted); line-height: 1.8; }
.process-section { padding: 96px 0; color: #fff; background: var(--footer); }
.process-section .eyebrow { color: #9fcd66; }
.process-grid { display: grid; grid-template-columns: repeat(4,1fr); gap: 16px; }
.process-grid article { padding: 34px; background: rgba(255,255,255,.055); border: 1px solid rgba(255,255,255,.1); }
.process-grid span { width: 42px; height: 42px; display: grid; place-items: center; color: #b8dc8b; border: 1px solid rgba(184,220,139,.38); border-radius: 50%; }
.process-grid h3 { margin: 42px 0 12px; }
.process-grid p { margin: 0; color: rgba(255,255,255,.62); font-size: .9rem; line-height: 1.7; }
.process-grid-three { grid-template-columns: repeat(3,1fr); color: var(--ink); }
.process-grid-three article { background: #fff; border-color: var(--line); }
.process-grid-three p { color: var(--muted); }
.service-detail-grid { display: grid; grid-template-columns: 1.1fr .9fr; gap: 80px; align-items: start; }
.service-scope-card { padding: 48px; color: #fff; background: var(--footer); }
.service-scope-card h2 { margin-top: 0; }

.contact-section { padding: 90px 0; background: #fff; }
.contact-grid { display: grid; grid-template-columns: .85fr 1.15fr; gap: 26px; }
.contact-info-card { padding: 55px; color: #fff; background: var(--footer); }
.contact-info-card h2 { margin: 0 0 18px; font-size: clamp(2rem,3.7vw,3.8rem); line-height: 1.08; }
.contact-info-card > p:not(.eyebrow) { color: rgba(255,255,255,.68); line-height: 1.8; }
.contact-detail { display: flex; flex-direction: column; gap: 5px; padding: 18px 0; border-bottom: 1px solid rgba(255,255,255,.12); }
.contact-detail span { color: #91bf59; font-size: .72rem; font-weight: 800; letter-spacing: .1em; text-transform: uppercase; }
.contact-detail a { color: #fff; text-decoration: none; font-weight: 700; }
.contact-image { margin: 34px -22px -22px; height: 220px; overflow: hidden; }
.contact-image img { width: 100%; height: 100%; object-fit: cover; }
.contact-form-card { padding: 55px; background: var(--surface); border: 1px solid var(--line); }
.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 22px; }
.field-wide { grid-column: 1/-1; }
.field-group { display: flex; flex-direction: column; gap: 8px; }
.field-group label { font-size: .8rem; font-weight: 800; }
.field-group input, .field-group select, .field-group textarea { width: 100%; padding: 14px 15px; color: var(--ink); background: #fff; border: 1px solid #cfd8ca; border-radius: 0; outline: none; }
.field-group input:focus, .field-group select:focus, .field-group textarea:focus { border-color: var(--green); box-shadow: 0 0 0 3px rgba(86,141,23,.1); }
.field-group span { min-height: 17px; color: #b3261e; font-size: .75rem; }
.validation-summary { margin-bottom: 20px; color: #b3261e; }
.form-success { margin-bottom: 24px; padding: 15px 18px; color: #264b09; background: #e7f4da; border-left: 4px solid var(--green); }
.form-note { color: var(--muted); font-size: .75rem; line-height: 1.55; }
.form-note code { color: var(--green-dark); }

.button { display: inline-flex; align-items: center; justify-content: center; gap: 12px; min-height: 48px; padding: 13px 21px; border: 0; text-decoration: none; font-weight: 800; transition: transform .2s, box-shadow .2s; }
.button:hover { transform: translateY(-2px); }
.button-primary { color: #fff; background: linear-gradient(135deg,#659c1f,#3f710c); box-shadow: 0 13px 28px rgba(66,114,15,.2); }
.button-light { color: var(--green-dark); background: #fff; }

.site-footer { position: relative; padding: 66px 0 0; color: rgba(255,255,255,.65); background: radial-gradient(circle at 10% 10%,rgba(98,149,39,.14),transparent 32%),linear-gradient(135deg,var(--footer),#08100a); }
.footer-accent { position: absolute; inset: 0 0 auto; height: 4px; background: linear-gradient(90deg,var(--green-dark),#84b937,var(--green-dark)); }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1.35fr 1.2fr; gap: 58px; }
.footer-grid section:not(.footer-intro) { display: flex; flex-direction: column; gap: 12px; }
.footer-grid h2 { margin: 5px 0 9px; color: #fff; font-size: .79rem; letter-spacing: .1em; text-transform: uppercase; }
.footer-grid a { color: rgba(255,255,255,.62); text-decoration: none; font-size: .85rem; }
.footer-grid a:hover { color: #a1ce68; }
.footer-grid span { font-size: .85rem; }
.footer-brand { display: inline-flex; align-items: center; gap: 13px; color: #fff !important; }
.footer-brand img { width: 54px; height: 54px; }
.footer-brand span { display: flex; flex-direction: column; }
.footer-brand strong { font-size: 1rem; }
.footer-brand small { margin-top: 5px; color: #90bd55; font-size: .7rem; letter-spacing: .08em; text-transform: uppercase; }
.footer-intro p { max-width: 440px; line-height: 1.8; }
.footer-contact { display: block; margin-top: 8px; }
.footer-bottom { display: flex; align-items: center; justify-content: space-between; gap: 20px; margin-top: 48px; padding: 22px 0; border-top: 1px solid rgba(255,255,255,.1); }
.footer-bottom p { margin: 0; font-size: .78rem; }
.footer-bottom a { color: #98c65d; text-decoration: none; font-size: .8rem; font-weight: 700; }
.back-to-top { position: fixed; right: 18px; bottom: 18px; z-index: 900; width: 44px; height: 44px; color: #fff; background: var(--green); border: 0; opacity: 0; visibility: hidden; transform: translateY(10px); transition: .2s; }
.back-to-top.visible { opacity: 1; visibility: visible; transform: none; }
.simple-message-section { min-height: 70vh; display: grid; place-items: center; padding: 80px 0; }
.simple-message-card { max-width: 760px; padding: 70px; text-align: center; background: #fff; box-shadow: var(--shadow); }
.simple-message-card h1 { font-size: clamp(2.2rem,5vw,4.5rem); }
.request-id { margin-top: 30px; color: var(--muted); font-size: .8rem; }

@media (max-width: 1100px) {
    .home-showcase { grid-template-columns: repeat(2,1fr); grid-template-rows: auto 260px auto auto; grid-template-areas: 'hero hero' 'city engineering' 'features features' 'sustainable services'; }
    .mosaic-hero { aspect-ratio: 886/513; }
    .mosaic-sustainable, .home-services-panel { min-height: 420px; }
    .home-services-panel article { padding: 22px 25px; }
    .home-services-panel p { display: none; }
    .sector-strip { grid-template-columns: repeat(2,1fr); }
    .value-grid { grid-template-columns: repeat(2,1fr); }
    .footer-grid { grid-template-columns: 1.8fr 1fr 1.3fr; }
    .footer-grid section:last-child { grid-column: 2/4; }
}

@media (max-width: 980px) {
    .topbar { display: none; }
    .navigation-wrap { min-height: 74px; }
    .menu-toggle { display: block; }
    .main-nav { position: absolute; top: 100%; left: 0; right: 0; display: none; padding: 15px 20px 22px; align-items: stretch; flex-direction: column; background: #fff; border-top: 1px solid var(--line); box-shadow: 0 20px 40px rgba(20,40,15,.12); }
    .main-nav.open { display: flex; }
    .main-nav > a, .nav-dropdown-toggle { width: 100%; padding: 13px 4px; text-align: left; border-bottom: 1px solid var(--line); }
    .main-nav > a::after, .nav-dropdown-toggle::after { display: none; }
    .nav-dropdown-menu { position: static; display: none; width: 100%; padding: 4px 0 8px 15px; border: 0; box-shadow: none; opacity: 1; visibility: visible; transform: none; }
    .nav-dropdown.open .nav-dropdown-menu { display: block; }
    .header-cta { margin: 10px 0 0; text-align: center !important; }
    .split-layout, .image-story-grid, .service-detail-grid, .contact-grid { grid-template-columns: 1fr; gap: 45px; }
    .image-story-grid figure { min-height: 480px; }
    .process-grid { grid-template-columns: repeat(2,1fr); }
    .service-row { min-height: 0; grid-template-columns: 1fr; }
    .service-row.reverse img { order: 0; }
    .service-row > img { height: 380px; }
    .service-row > div { padding: 50px; }
}

@media (max-width: 720px) {
    .shell { width: min(100% - 28px,1180px); }
    .shell-wide { width: calc(100% - 10px); }
    .brand-copy small { display: none; }
    .brand img { width: 48px; height: 48px; }
    .home-showcase { display: flex; flex-direction: column; gap: 6px; }
    .mosaic-hero { aspect-ratio: 886/513; }
    .mosaic-city, .mosaic-engineering, .mosaic-sustainable { min-height: 270px; }
    .strengths-panel { grid-template-columns: repeat(2,1fr); }
    .strengths-panel article { min-height: 190px; border-bottom: 1px solid var(--line); }
    .strengths-panel article:nth-child(2)::after, .strengths-panel article:nth-child(4)::after { display: none; }
    .home-services-panel { min-height: 0; }
    .home-services-panel article { min-height: 225px; }
    .home-services-panel p { display: block; }
    .sector-strip { grid-template-columns: 1fr; gap: 6px; }
    .content-section, .contact-section, .process-section { padding: 70px 0; }
    .page-hero { min-height: 430px; }
    .page-hero-inner { padding-bottom: 52px; }
    .story-card { padding: 45px 30px; }
    .value-grid, .process-grid, .process-grid-three { grid-template-columns: 1fr; }
    .cta-band-inner { align-items: flex-start; flex-direction: column; }
    .service-row > img { height: 290px; }
    .service-row > div, .contact-info-card, .contact-form-card, .service-scope-card { padding: 35px 25px; }
    .form-grid { grid-template-columns: 1fr; }
    .field-wide { grid-column: auto; }
    .footer-grid { grid-template-columns: 1fr 1fr; gap: 40px 25px; }
    .footer-intro { grid-column: 1/-1; }
    .footer-grid section:last-child { grid-column: auto; }
    .footer-bottom { align-items: flex-start; flex-direction: column; }
}

@media (max-width: 430px) {
    .brand-copy > span { font-size: .9rem; }
    .strengths-panel { grid-template-columns: 1fr; }
    .strengths-panel article::after { display: none !important; }
    .footer-grid { grid-template-columns: 1fr; }
    .footer-grid section:last-child { grid-column: auto; }
    .simple-message-card { padding: 45px 22px; }
}

/* --------------------------------------------------------------------------
   2026 brand refresh: BTT logo, simplified navigation, About and Contact
   -------------------------------------------------------------------------- */
:root {
    --navy: #082c43;
    --navy-deep: #061f31;
    --navy-soft: #edf3f6;
}

.topbar {
    background: var(--navy-deep);
}

.navigation-wrap {
    min-height: 96px;
}

.brand {
    flex: 0 0 auto;
}

.brand img {
    width: 270px;
    height: auto;
    max-height: 82px;
    object-fit: contain;
}

.site-header {
    border-bottom-color: rgba(8, 44, 67, .1);
}

.main-nav > a:hover,
.main-nav > a.active {
    color: var(--navy);
}

.main-nav > a:not(.header-cta)::after {
    background: var(--green);
}

.header-cta {
    background: linear-gradient(135deg, #173e55, var(--navy));
    box-shadow: 0 10px 24px rgba(8, 44, 67, .18);
}

.footer-brand img {
    width: min(300px, 100%);
    height: auto;
}

.footer-grid-simple {
    grid-template-columns: 2fr 1fr 1.25fr 1.15fr;
}

/* About Us */
.about-page-hero {
    position: relative;
    overflow: hidden;
    padding: 88px 0 82px;
    color: #fff;
    background:
        radial-gradient(circle at 82% 12%, rgba(86, 141, 23, .28), transparent 28%),
        linear-gradient(135deg, var(--navy-deep), var(--navy));
}

.about-page-hero::after {
    content: '';
    position: absolute;
    width: 340px;
    height: 340px;
    right: -130px;
    bottom: -190px;
    border: 1px solid rgba(255, 255, 255, .12);
    border-radius: 50%;
}

.about-page-hero-inner {
    position: relative;
    z-index: 1;
    max-width: 930px;
}

.about-page-hero .eyebrow {
    color: #acd477;
}

.about-page-hero h1 {
    margin: 0 0 22px;
    font-size: clamp(3rem, 6vw, 5.6rem);
    line-height: .98;
    letter-spacing: -.055em;
}

.about-page-hero p:last-child {
    max-width: 820px;
    margin: 0;
    color: rgba(255, 255, 255, .8);
    font-size: 1.15rem;
    line-height: 1.8;
}

.about-page-content {
    padding: 88px 0;
    background: #fff;
}

.about-page-grid {
    display: grid;
    grid-template-columns: .7fr 1.3fr;
    gap: 90px;
    align-items: start;
}

.about-page-heading {
    position: sticky;
    top: 145px;
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    gap: 9px;
}

.about-page-heading span {
    display: inline-block;
    padding: 9px 13px;
    color: var(--navy);
    background: var(--navy-soft);
    border-left: 3px solid var(--green);
    font-size: .78rem;
    font-weight: 800;
    letter-spacing: .04em;
    text-transform: uppercase;
}

.about-page-copy {
    max-width: 780px;
}

.about-page-copy p {
    margin: 0;
    padding: 0 0 30px;
    color: #46525a;
    font-size: 1.08rem;
    line-height: 1.92;
    border-bottom: 1px solid #e5eaed;
}

.about-page-copy p + p {
    padding-top: 30px;
}

.about-page-copy p:last-child {
    padding-bottom: 0;
    border-bottom: 0;
}

.about-mission-band {
    padding: 62px 0;
    color: #fff;
    background: linear-gradient(135deg, #315d08, #568d17);
}

.about-mission-inner {
    display: grid;
    grid-template-columns: 1fr auto;
    gap: 40px;
    align-items: center;
}

.about-mission-inner .eyebrow {
    grid-column: 1 / -1;
    margin-bottom: -24px;
    color: rgba(255, 255, 255, .7);
}

.about-mission-text {
    max-width: 850px;
    margin: 0;
    font-size: clamp(1.5rem, 3vw, 2.4rem);
    font-weight: 700;
    line-height: 1.35;
    letter-spacing: -.025em;
}

/* Legacy contact styles retained for backward compatibility */

@media (max-width: 1100px) {
    .footer-grid-simple {
        grid-template-columns: 1.7fr 1fr 1fr;
    }

    .footer-grid-simple section:last-child {
        grid-column: 2 / 4;
    }
}

@media (max-width: 980px) {
    .navigation-wrap {
        min-height: 84px;
    }

    .brand img {
        width: 225px;
        max-height: 72px;
    }

    .about-page-grid {
        grid-template-columns: 1fr;
        gap: 35px;
    }

    .about-page-heading {
        position: static;
        flex-direction: row;
        flex-wrap: wrap;
    }

    .about-mission-inner {
        grid-template-columns: 1fr;
    }

    .about-mission-inner .eyebrow {
        grid-column: auto;
        margin-bottom: -20px;
    }
}

@media (max-width: 720px) {
    .navigation-wrap {
        min-height: 78px;
    }

    .brand img {
        width: 205px;
        max-height: 68px;
    }

    .about-page-hero {
        padding: 62px 0 58px;
    }

    .about-page-hero h1 {
        font-size: 3rem;
    }

    .about-page-hero p:last-child {
        font-size: 1rem;
    }

    .about-page-content {
        padding: 62px 0;
    }

    .about-page-copy p {
        font-size: 1rem;
    }

    .about-mission-band {
        padding: 52px 0;
    }

    .contact-map {
        margin: 30px -10px -10px;
        height: 230px;
    }

    .footer-grid-simple {
        grid-template-columns: 1fr 1fr;
    }

    .footer-grid-simple .footer-intro {
        grid-column: 1 / -1;
    }

    .footer-grid-simple section:last-child {
        grid-column: auto;
    }
}

@media (max-width: 430px) {
    .brand img {
        width: 178px;
    }

    .about-page-heading {
        flex-direction: column;
    }

    .footer-grid-simple {
        grid-template-columns: 1fr;
    }
}

/* --------------------------------------------------------------------------
   Original BTT logo integration + high-definition media refresh
   The logo asset itself is the exact image provided by the client; CSS only
   controls how it is framed inside the header/footer.
   -------------------------------------------------------------------------- */
:root {
    --brand-navy: #022038;
    --brand-navy-deep: #01182a;
    --brand-green: #78a92f;
}

.site-header {
    background: var(--brand-navy);
    border-bottom-color: rgba(255,255,255,.08);
    box-shadow: 0 12px 32px rgba(0,20,35,.18);
}

.topbar {
    background: var(--brand-navy-deep);
    border-bottom: 1px solid rgba(255,255,255,.06);
}

.topbar-contact,
.topbar-contact a {
    color: rgba(255,255,255,.76);
}

.topbar-tagline {
    color: rgba(255,255,255,.52);
}

.navigation-wrap {
    min-height: 102px;
}

.brand {
    width: 340px;
    height: 86px;
    flex: 0 0 340px;
    overflow: hidden;
    background: var(--brand-navy);
}

.brand img {
    width: 100%;
    height: 100%;
    max-height: none;
    object-fit: cover;
    object-position: center center;
}

.main-nav > a {
    color: rgba(255,255,255,.9);
}

.main-nav > a:hover,
.main-nav > a.active {
    color: #b7da84;
}

.main-nav > a:not(.header-cta)::after {
    background: #8fbd49;
}

.header-cta {
    color: #fff !important;
    background: linear-gradient(135deg,#719f2d,#4f7d18);
    box-shadow: 0 10px 24px rgba(0,0,0,.18);
}

.header-cta:hover {
    background: linear-gradient(135deg,#7fab36,#5c8b20);
}

.menu-toggle {
    background: transparent;
    border-color: rgba(255,255,255,.28);
}

.menu-toggle span:not(.visually-hidden) {
    background: #fff;
}

.site-footer {
    background:
        radial-gradient(circle at 14% 8%, rgba(87,142,25,.15), transparent 30%),
        linear-gradient(135deg,#022038,#011827);
}

.footer-brand {
    width: 360px;
    height: 96px;
    max-width: 100%;
    overflow: hidden;
    background: var(--brand-navy);
}

.footer-brand img {
    width: 100%;
    height: 100%;
    max-height: none;
    object-fit: cover;
    object-position: center center;
}

/* Keep photographic assets crisp in all mosaic sizes. */
.mosaic-card img,
.sector-strip img,
.service-row > img,
.page-hero {
    image-rendering: auto;
}

.mosaic-card img,
.sector-strip img {
    backface-visibility: hidden;
}

@media (max-width: 980px) {
    .main-nav {
        background: var(--brand-navy);
        border-top-color: rgba(255,255,255,.1);
        box-shadow: 0 20px 40px rgba(0,20,35,.26);
    }

    .main-nav > a {
        color: rgba(255,255,255,.92);
        border-bottom-color: rgba(255,255,255,.1);
    }

    .brand {
        width: 300px;
        height: 76px;
        flex-basis: 300px;
    }
}

@media (max-width: 560px) {
    .navigation-wrap {
        min-height: 82px;
    }

    .brand {
        width: 238px;
        height: 68px;
        flex-basis: 238px;
    }

    .footer-brand {
        width: 300px;
        height: 86px;
    }
}


/* --------------------------------------------------------------------------
   Home page consistency fixes
   -------------------------------------------------------------------------- */
.home-showcase,
.sector-strip {
    align-items: stretch;
}

.sector-strip a,
.sector-strip img {
    border-radius: 0;
}

@media (max-width: 1100px) {
    .sector-strip {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }
}

@media (max-width: 720px) {
    .sector-strip {
        grid-template-columns: 1fr;
        gap: 8px;
    }

    .sector-strip a {
        min-height: 220px;
    }
}

/* --------------------------------------------------------------------------
   Modern Contact page refresh
   -------------------------------------------------------------------------- */
.contact-modern-hero {
    position: relative;
    overflow: hidden;
    padding: 92px 0 84px;
    color: #fff;
    background:
        radial-gradient(circle at 85% 15%, rgba(86, 141, 23, .24), transparent 28%),
        linear-gradient(135deg, #061a29, #0b3650 58%, #0a2d45 100%);
}

.contact-modern-hero::after {
    content: '';
    position: absolute;
    inset: auto -70px -110px auto;
    width: 260px;
    height: 260px;
    border: 1px solid rgba(255,255,255,.12);
    border-radius: 50%;
}

.contact-modern-hero-inner {
    position: relative;
    z-index: 1;
    display: grid;
    grid-template-columns: minmax(0, 1.12fr) minmax(320px, .88fr);
    gap: 34px;
    align-items: end;
}

.contact-modern-hero h1 {
    max-width: 760px;
    margin: 0 0 18px;
    font-size: clamp(3rem, 5vw, 5rem);
    line-height: .98;
    letter-spacing: -.055em;
}

.contact-modern-lead {
    max-width: 760px;
    margin: 0;
    color: rgba(255,255,255,.82);
    font-size: 1.08rem;
    line-height: 1.8;
}

.contact-quick-cards {
    display: grid;
    gap: 14px;
}

.contact-quick-cards article {
    padding: 20px 22px;
    background: rgba(255,255,255,.08);
    border: 1px solid rgba(255,255,255,.12);
    backdrop-filter: blur(6px);
}

.contact-quick-cards span,
.contact-detail-item span {
    display: inline-block;
    margin-bottom: 8px;
    color: #a7d469;
    font-size: .74rem;
    font-weight: 800;
    letter-spacing: .12em;
    text-transform: uppercase;
}

.contact-quick-cards a,
.contact-quick-cards strong,
.contact-detail-item a,
.contact-detail-item strong {
    display: block;
    color: #fff;
    text-decoration: none;
    font-size: 1rem;
    font-weight: 700;
    line-height: 1.5;
}

.contact-quick-cards small {
    display: block;
    margin-top: 3px;
    color: rgba(255,255,255,.7);
    font-size: .9rem;
}

.contact-modern-section {
    padding: 86px 0 56px;
    background: #f5f7f2;
}

.contact-modern-grid {
    display: grid;
    grid-template-columns: minmax(320px, .82fr) minmax(0, 1.18fr);
    gap: 30px;
    align-items: start;
}

.contact-modern-aside {
    display: grid;
    gap: 22px;
}

.contact-info-panel,
.contact-mini-panel,
.contact-modern-form-card,
.contact-map-shell {
    background: #fff;
    border: 1px solid #e1e7dc;
    box-shadow: 0 24px 60px rgba(20, 40, 15, .06);
}

.contact-info-panel {
    padding: 42px 40px;
    color: #13200f;
    background: linear-gradient(180deg, #0f2435 0, #0b1f30 58%, #0d2232 100%);
}

.contact-info-panel .eyebrow {
    color: #a7d469;
}

.contact-info-panel h2 {
    margin: 0 0 16px;
    color: #fff;
    font-size: clamp(2rem, 3vw, 3rem);
    line-height: 1.08;
}

.contact-info-panel > p:last-of-type {
    margin: 0 0 24px;
    color: rgba(255,255,255,.76);
    line-height: 1.8;
}

.contact-detail-list {
    display: grid;
    gap: 0;
}

.contact-detail-item {
    padding: 16px 0;
    border-top: 1px solid rgba(255,255,255,.09);
}

.contact-mini-panel {
    padding: 32px 34px;
}

.contact-mini-panel h3 {
    margin: 0 0 16px;
    font-size: 1.2rem;
}

.contact-mini-panel ul {
    margin: 0;
    padding-left: 18px;
    color: #5b6659;
    line-height: 1.9;
}

.contact-modern-form-card {
    padding: 42px 42px 36px;
}

.contact-form-heading {
    margin-bottom: 24px;
}

.contact-form-heading h2 {
    margin: 8px 0 0;
    font-size: clamp(2rem, 3vw, 2.7rem);
    line-height: 1.08;
}

.contact-modern-form-card .form-grid {
    gap: 20px;
}

.contact-modern-form-card .field-group label {
    color: #1c2619;
    font-size: .78rem;
    letter-spacing: .03em;
}

.contact-modern-form-card .field-group input,
.contact-modern-form-card .field-group select,
.contact-modern-form-card .field-group textarea {
    padding: 15px 16px;
    border-radius: 12px;
    border: 1px solid #d5ddd0;
    background: #fbfcfa;
    transition: border-color .2s ease, box-shadow .2s ease, background .2s ease;
}

.contact-modern-form-card .field-group input::placeholder,
.contact-modern-form-card .field-group textarea::placeholder {
    color: #8b9588;
}

.contact-modern-form-card .field-group input:focus,
.contact-modern-form-card .field-group select:focus,
.contact-modern-form-card .field-group textarea:focus {
    background: #fff;
    border-color: #568d17;
    box-shadow: 0 0 0 4px rgba(86, 141, 23, .12);
}

.contact-form-actions {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 18px;
    margin-top: 10px;
}

.contact-form-actions .form-note {
    max-width: 360px;
    margin: 0;
    font-size: .8rem;
}

.contact-map-section {
    padding: 0 0 92px;
    background: #f5f7f2;
}

.contact-map-shell {
    display: grid;
    grid-template-columns: minmax(280px, .75fr) minmax(0, 1.25fr);
    gap: 0;
    overflow: hidden;
}

.contact-map-copy {
    padding: 42px 40px;
}

.contact-map-copy h2 {
    margin: 10px 0 14px;
    font-size: clamp(2rem, 3vw, 2.8rem);
    line-height: 1.08;
}

.contact-map-copy p:last-child {
    margin: 0;
    color: #5f695d;
    line-height: 1.8;
}

.contact-map-frame {
    min-height: 360px;
    background: #dde5e9;
}

.contact-map-frame iframe {
    width: 100%;
    height: 100%;
    border: 0;
    display: block;
}

@media (max-width: 980px) {
    .contact-modern-hero-inner,
    .contact-modern-grid,
    .contact-map-shell {
        grid-template-columns: 1fr;
    }

    .contact-modern-hero {
        padding: 74px 0 66px;
    }

    .contact-modern-section {
        padding: 66px 0 46px;
    }

    .contact-map-section {
        padding-bottom: 68px;
    }
}

@media (max-width: 720px) {
    .contact-modern-hero h1 {
        font-size: 2.8rem;
    }

    .contact-info-panel,
    .contact-mini-panel,
    .contact-modern-form-card,
    .contact-map-copy {
        padding: 30px 24px;
    }

    .contact-form-actions {
        align-items: flex-start;
        flex-direction: column;
    }

    .contact-form-actions .button {
        width: 100%;
    }

    .contact-map-frame {
        min-height: 300px;
    }
}

/* ========================================================================== 
   Simple modern internal pages (no internal photography)
   ========================================================================== */
.internal-hero {
    position: relative;
    overflow: hidden;
    padding: 84px 0 76px;
    color: #fff;
    background:
        radial-gradient(circle at 86% 12%, rgba(105, 158, 45, .20), transparent 30%),
        linear-gradient(135deg, #071c2a 0%, #0a3048 62%, #0e3d56 100%);
}

.internal-hero::after {
    content: '';
    position: absolute;
    width: 300px;
    height: 300px;
    right: -150px;
    bottom: -170px;
    border: 1px solid rgba(255,255,255,.1);
    border-radius: 50%;
}

.internal-hero-inner {
    position: relative;
    z-index: 1;
    max-width: 900px;
    margin-left: max(20px, calc((100% - 1180px) / 2));
    margin-right: auto;
}

.internal-hero .eyebrow {
    color: #abd273;
}

.internal-hero h1 {
    max-width: 850px;
    margin: 0 0 20px;
    color: #fff;
    font-size: clamp(2.8rem, 5vw, 4.8rem);
    line-height: 1.02;
    letter-spacing: -.05em;
}

.internal-hero p:last-child {
    max-width: 760px;
    margin: 0;
    color: rgba(255,255,255,.78);
    font-size: 1.08rem;
    line-height: 1.8;
}

.internal-back-link {
    display: inline-block;
    margin-bottom: 28px;
    color: rgba(255,255,255,.72);
    text-decoration: none;
    font-size: .82rem;
    font-weight: 700;
}

.internal-back-link:hover {
    color: #fff;
}

.internal-section {
    padding: 78px 0;
    background: #fff;
}

.internal-section-soft {
    background: #f5f7f2;
    border-top: 1px solid #e2e7de;
    border-bottom: 1px solid #e2e7de;
}

.section-kicker h2,
.compact-heading h2,
.service-detail-intro h2,
.contact-simple-info h2,
.contact-location-copy h2 {
    margin: 0;
    color: #111711;
    font-size: clamp(2rem, 3.6vw, 3.25rem);
    line-height: 1.1;
    letter-spacing: -.035em;
}

.compact-heading {
    max-width: 700px;
    margin-bottom: 34px;
}

.centered-heading {
    margin-inline: auto;
    text-align: center;
}

.about-modern-grid {
    display: grid;
    grid-template-columns: .82fr 1.18fr;
    gap: 86px;
    align-items: start;
}

.about-modern-copy {
    max-width: 720px;
}

.about-modern-copy p {
    margin: 0 0 23px;
    color: #5f695d;
    font-size: 1.03rem;
    line-height: 1.9;
}

.about-modern-copy p:last-child {
    margin-bottom: 0;
}

.simple-card-grid {
    display: grid;
    gap: 18px;
}

.simple-card-grid.four-columns {
    grid-template-columns: repeat(4, minmax(0, 1fr));
}

.simple-card-grid.three-columns {
    grid-template-columns: repeat(3, minmax(0, 1fr));
}

.simple-card {
    min-height: 220px;
    padding: 28px 26px;
    background: #fff;
    border: 1px solid #dfe5da;
    transition: transform .2s ease, border-color .2s ease, box-shadow .2s ease;
}

.simple-card:hover {
    transform: translateY(-3px);
    border-color: #afc892;
    box-shadow: 0 18px 40px rgba(25, 48, 18, .06);
}

.simple-card-number {
    display: block;
    margin-bottom: 36px;
    color: #568d17;
    font-size: .75rem;
    font-weight: 800;
    letter-spacing: .12em;
}

.simple-card h3 {
    margin: 0 0 12px;
    font-size: 1.08rem;
}

.simple-card p {
    margin: 0;
    color: #626b62;
    font-size: .9rem;
    line-height: 1.72;
}

.internal-cta {
    padding: 58px 0;
    color: #fff;
    background: linear-gradient(135deg, #315d08, #568d17);
}

.internal-cta-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 45px;
}

.internal-cta .eyebrow {
    color: rgba(255,255,255,.72);
}

.internal-cta h2 {
    margin: 0 0 10px;
    color: #fff;
    font-size: clamp(2rem, 3vw, 2.8rem);
    line-height: 1.08;
}

.internal-cta p:last-child {
    max-width: 740px;
    margin: 0;
    color: rgba(255,255,255,.76);
    line-height: 1.7;
}

.service-card-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 18px;
}

.service-modern-card {
    min-height: 260px;
    display: flex;
    flex-direction: column;
    padding: 32px 30px;
    color: #111711;
    background: #fff;
    border: 1px solid #dfe5da;
    text-decoration: none;
    transition: transform .2s ease, border-color .2s ease, box-shadow .2s ease;
}

.service-modern-card:hover {
    transform: translateY(-3px);
    border-color: #afc892;
    box-shadow: 0 18px 40px rgba(25,48,18,.06);
}

.service-modern-card > span {
    margin-bottom: 30px;
    color: #568d17;
    font-size: .74rem;
    font-weight: 800;
    letter-spacing: .12em;
}

.service-modern-card h3 {
    margin: 0 0 12px;
    font-size: 1.35rem;
}

.service-modern-card p {
    margin: 0 0 25px;
    color: #626b62;
    line-height: 1.75;
}

.service-modern-card strong {
    margin-top: auto;
    color: #568d17;
    font-size: .84rem;
}

.service-card-grid .service-modern-card:last-child {
    grid-column: 1 / -1;
}

.service-hero-simple {
    padding-top: 66px;
}

.service-detail-modern {
    display: grid;
    grid-template-columns: 1.08fr .92fr;
    gap: 70px;
    align-items: start;
}

.service-detail-intro > p:not(.eyebrow) {
    max-width: 670px;
    margin: 22px 0 28px;
    color: #616b5f;
    font-size: 1.02rem;
    line-height: 1.85;
}

.service-scope-modern {
    padding: 34px 34px 28px;
    background: #f5f7f2;
    border: 1px solid #dfe5da;
}

.service-scope-modern h2 {
    margin: 0 0 22px;
    font-size: 1.2rem;
}

.service-scope-modern ul {
    list-style: none;
    margin: 0;
    padding: 0;
}

.service-scope-modern li {
    position: relative;
    padding: 14px 0 14px 26px;
    color: #4f5a4d;
    border-top: 1px solid #dfe5da;
    line-height: 1.55;
}

.service-scope-modern li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: #568d17;
    font-weight: 800;
}

/* Contact */
.contact-simple-section {
    padding: 78px 0 58px;
    background: #f5f7f2;
}

.contact-simple-grid {
    display: grid;
    grid-template-columns: .78fr 1.22fr;
    gap: 28px;
    align-items: start;
}

.contact-simple-info,
.contact-simple-form {
    background: #fff;
    border: 1px solid #dfe5da;
}

.contact-simple-info {
    padding: 42px 38px;
}

.contact-simple-info > p:not(.eyebrow) {
    margin: 18px 0 24px;
    color: #616b5f;
    line-height: 1.8;
}

.contact-simple-list {
    display: grid;
}

.contact-simple-list > div {
    padding: 17px 0;
    border-top: 1px solid #e2e7de;
}

.contact-simple-list span {
    display: block;
    margin-bottom: 6px;
    color: #568d17;
    font-size: .72rem;
    font-weight: 800;
    letter-spacing: .1em;
    text-transform: uppercase;
}

.contact-simple-list a,
.contact-simple-list strong {
    color: #172017;
    text-decoration: none;
    font-size: .94rem;
    font-weight: 700;
    line-height: 1.5;
}

.contact-simple-form {
    padding: 42px 40px 36px;
}

.contact-simple-form .compact-heading {
    margin-bottom: 26px;
}

.contact-simple-form .field-group input,
.contact-simple-form .field-group select,
.contact-simple-form .field-group textarea {
    padding: 14px 15px;
    background: #fbfcfa;
    border: 1px solid #d1dacd;
    border-radius: 9px;
}

.contact-simple-form .field-group input:focus,
.contact-simple-form .field-group select:focus,
.contact-simple-form .field-group textarea:focus {
    background: #fff;
    border-color: #568d17;
    box-shadow: 0 0 0 4px rgba(86,141,23,.1);
}

.contact-location-section {
    padding: 0 0 82px;
    background: #f5f7f2;
}

.contact-location-grid {
    display: grid;
    grid-template-columns: .72fr 1.28fr;
    background: #fff;
    border: 1px solid #dfe5da;
    overflow: hidden;
}

.contact-location-copy {
    padding: 40px 38px;
}

.contact-location-copy p:last-child {
    margin: 18px 0 0;
    color: #616b5f;
    line-height: 1.8;
}

.contact-location-map {
    min-height: 350px;
    background: #dde4e7;
}

.contact-location-map iframe {
    width: 100%;
    height: 100%;
    min-height: 350px;
    display: block;
    border: 0;
}

@media (max-width: 980px) {
    .internal-hero-inner {
        margin-inline: auto;
    }

    .about-modern-grid,
    .service-detail-modern,
    .contact-simple-grid,
    .contact-location-grid {
        grid-template-columns: 1fr;
        gap: 34px;
    }

    .simple-card-grid.four-columns {
        grid-template-columns: repeat(2, minmax(0,1fr));
    }

    .internal-cta-inner {
        align-items: flex-start;
        flex-direction: column;
        gap: 28px;
    }
}

@media (max-width: 720px) {
    .internal-hero {
        padding: 60px 0 56px;
    }

    .service-hero-simple {
        padding-top: 48px;
    }

    .internal-hero h1 {
        font-size: 2.75rem;
    }

    .internal-hero p:last-child {
        font-size: 1rem;
    }

    .internal-section,
    .contact-simple-section {
        padding: 58px 0;
    }

    .service-card-grid,
    .simple-card-grid.four-columns,
    .simple-card-grid.three-columns {
        grid-template-columns: 1fr;
    }

    .service-card-grid .service-modern-card:last-child {
        grid-column: auto;
    }

    .simple-card,
    .service-modern-card {
        min-height: 0;
    }

    .contact-simple-info,
    .contact-simple-form,
    .contact-location-copy,
    .service-scope-modern {
        padding: 30px 24px;
    }

    .contact-form-actions {
        align-items: flex-start;
        flex-direction: column;
    }

    .contact-form-actions .button {
        width: 100%;
    }

    .contact-location-section {
        padding-bottom: 58px;
    }

    .contact-location-map,
    .contact-location-map iframe {
        min-height: 290px;
    }
}