:root {
  --atc-green: #146b49;
  --atc-green-dark: #073b2c;
  --atc-green-deep: #042a20;
  --atc-lime: #a7d64f;
  --atc-mint: #e9f4ee;
  --atc-paper: #ffffff;
  --atc-ink: #14231d;
  --atc-muted: #58675f;
  --atc-line: #d6e3db;
  --atc-shadow: 0 18px 42px rgba(4, 42, 32, .16);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; font-family: Barlow, Arial, sans-serif; color: var(--atc-ink); background: var(--atc-paper); line-height: 1.65; }
img { max-width: 100%; display: block; }
.shell { width: min(1400px, calc(100% - 48px)); margin: 0 auto; }
.eyebrow { margin: 0 0 12px; color: var(--atc-green); font-size: 13px; font-weight: 800; letter-spacing: 0; text-transform: uppercase; }
h1, h2, h3 { margin-top: 0; letter-spacing: 0; }
h1 { font-size: clamp(46px, 6vw, 82px); line-height: 1.02; }
h2 { font-size: clamp(34px, 4vw, 54px); line-height: 1.08; }
p { margin: 0 0 20px; }

.site-header {
  min-height: 92px;
  padding: 0 max(24px, calc((100vw - 1400px) / 2));
  display: flex;
  align-items: center;
  gap: 32px;
  color: #fff;
  background: var(--atc-green-dark);
  border-bottom: 1px solid rgba(255, 255, 255, .13);
  position: sticky;
  top: 0;
  z-index: 40;
}
.brand { display: flex; align-items: center; min-width: 210px; color: #fff; text-decoration: none; }
.brand img { width: 210px; height: 68px; object-fit: contain; object-position: left center; }
.site-header nav { margin-left: auto; display: flex; align-items: center; gap: 28px; }
.site-header nav a, footer a { color: inherit; text-decoration: none; }
.site-header nav a { font-weight: 700; }
.site-header nav a:hover { color: var(--atc-lime); }
.header-call, .button {
  min-height: 50px;
  padding: 0 22px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 2px solid var(--atc-green);
  border-radius: 3px;
  color: #fff;
  background: var(--atc-green);
  text-decoration: none;
  font-weight: 800;
  transition: transform .2s ease, background .2s ease;
}
.header-call { border-color: var(--atc-lime); background: var(--atc-lime); color: var(--atc-green-deep); }
.button:hover, .header-call:hover { transform: translateY(-2px); }
.button--lime { background: var(--atc-lime); border-color: var(--atc-lime); color: var(--atc-green-deep); }
.button--outline { background: transparent; border-color: rgba(255,255,255,.7); }
.button--ghost { background: #fff; color: var(--atc-green-dark); }
.actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 30px; }
.menu-button { display: none; }

.home-hero {
  min-height: 690px;
  position: relative;
  display: grid;
  align-items: center;
  overflow: hidden;
  color: #fff;
  background: var(--atc-green-deep);
}
.home-hero__media { position: absolute; inset: 0 0 0 42%; }
.home-hero__media::after { content: ""; position: absolute; inset: 0; background: linear-gradient(90deg, var(--atc-green-deep) 0%, rgba(4,42,32,.84) 28%, rgba(4,42,32,.12) 80%); }
.home-hero__media img { width: 100%; height: 100%; object-fit: cover; }
.home-hero__content { position: relative; z-index: 2; padding: 90px 0 120px; }
.home-hero__content > * { max-width: 780px; }
.home-hero .eyebrow { color: var(--atc-lime); }
.home-hero h1 { max-width: 830px; margin-bottom: 24px; }
.home-hero__content > p:not(.eyebrow) { font-size: 21px; max-width: 700px; color: #e6f1eb; }
.home-hero__stamp {
  position: absolute;
  z-index: 3;
  right: max(24px, calc((100vw - 1400px) / 2));
  bottom: 32px;
  width: 260px;
  padding: 24px;
  color: var(--atc-green-deep);
  background: var(--atc-lime);
}
.home-hero__stamp strong, .home-hero__stamp span { display: block; }
.home-hero__stamp strong { font-size: 28px; line-height: 1; }
.home-hero__stamp span { margin-top: 7px; font-weight: 700; }

.metric-strip { background: var(--atc-green); color: #fff; }
.metric-strip__grid { display: grid; grid-template-columns: repeat(3, 1fr); }
.metric-strip__grid > div { padding: 25px 30px; border-right: 1px solid rgba(255,255,255,.18); }
.metric-strip strong, .metric-strip span { display: block; }
.metric-strip strong { font-size: 24px; }
.metric-strip span { color: #dff1e7; }

.home-intro, .home-services, .home-gallery, .content-section, .service-band, .faq { padding: 84px 0; }
.home-intro__grid { display: grid; grid-template-columns: minmax(0, .9fr) minmax(0, 1.1fr); gap: 76px; align-items: center; }
.home-intro__image { position: relative; min-height: 520px; background: var(--atc-green-dark); }
.home-intro__image img { width: 100%; height: 520px; object-fit: cover; }
.home-intro__image span { position: absolute; left: 0; bottom: 0; padding: 18px 24px; background: var(--atc-green); color: #fff; font-weight: 800; }
.home-intro p:not(.eyebrow) { color: var(--atc-muted); font-size: 18px; }
.text-link { color: var(--atc-green-dark); font-weight: 800; text-underline-offset: 5px; }

.home-services { background: var(--atc-mint); }
.section-heading { margin-bottom: 36px; display: flex; justify-content: space-between; align-items: end; gap: 24px; }
.section-heading h2 { margin-bottom: 0; }
.home-service-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.home-service-card { min-height: 390px; position: relative; overflow: hidden; color: #fff; background: var(--atc-green-dark); text-decoration: none; box-shadow: var(--atc-shadow); }
.home-service-card::after { content: ""; position: absolute; inset: 0; background: linear-gradient(180deg, transparent 32%, rgba(4,42,32,.94) 100%); }
.home-service-card img { width: 100%; height: 100%; object-fit: cover; transition: transform .35s ease; }
.home-service-card:hover img { transform: scale(1.04); }
.home-service-card span { position: absolute; z-index: 2; left: 24px; right: 24px; bottom: 24px; display: flex; flex-direction: column; }
.home-service-card small { color: var(--atc-lime); font-weight: 800; text-transform: uppercase; }
.home-service-card strong { font-size: 28px; line-height: 1.1; }
.home-service-card em { margin-top: 8px; font-style: normal; font-weight: 700; }

.home-gallery { background: #fff; }
.gallery-grid { display: grid; grid-template-columns: 1.25fr .75fr .75fr; grid-template-rows: 260px 260px; gap: 14px; }
.gallery-grid figure { margin: 0; position: relative; overflow: hidden; background: var(--atc-green-dark); }
.gallery-grid figure:first-child { grid-row: 1 / 3; }
.gallery-grid figure:last-child { grid-column: 2 / 4; }
.gallery-grid img { width: 100%; height: 100%; object-fit: cover; }
.gallery-grid figcaption { position: absolute; left: 0; bottom: 0; padding: 10px 16px; color: #fff; background: var(--atc-green-dark); font-weight: 700; }

.page-hero { padding: 76px 0; background: linear-gradient(100deg, #f4faf6 0 70%, var(--atc-mint) 70%); }
.page-hero__grid { display: grid; grid-template-columns: minmax(0, 1.15fr) minmax(360px, .85fr); gap: 64px; align-items: center; }
.page-hero h1 { font-size: clamp(44px, 5vw, 70px); margin: 12px 0 22px; }
.hero-copy { max-width: 780px; color: var(--atc-muted); font-size: 19px; }
.page-hero__image { min-height: 390px; position: relative; overflow: hidden; box-shadow: var(--atc-shadow); }
.page-hero__image img { width: 100%; height: 390px; object-fit: cover; }
.page-hero__image span { position: absolute; left: 18px; right: 18px; bottom: 18px; padding: 14px 16px; color: #fff; background: rgba(7,59,44,.94); font-weight: 700; }
.breadcrumbs { display: flex; gap: 10px; margin-bottom: 28px; color: var(--atc-muted); font-size: 14px; }
.breadcrumbs a { color: var(--atc-green); }

.service-band { background: var(--atc-green-dark); color: #fff; }
.service-band .eyebrow { color: var(--atc-lime); }
.service-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.service-card { min-height: 150px; display: grid; grid-template-columns: 120px 1fr; overflow: hidden; color: var(--atc-ink); background: #fff; text-decoration: none; transition: transform .2s ease; }
.service-card:hover { transform: translateY(-3px); }
.service-card img { width: 100%; height: 100%; object-fit: cover; }
.service-card span { padding: 18px; display: flex; flex-direction: column; justify-content: center; }
.service-card small { color: var(--atc-green); font-weight: 800; text-transform: uppercase; }
.service-card strong { font-size: 21px; line-height: 1.15; }

.content-section:nth-of-type(even) { background: #f5f9f6; }
.content-section--home:nth-of-type(odd) { background: var(--atc-mint); }
.content-grid { display: grid; grid-template-columns: 86px minmax(0, 1060px); gap: 34px; }
.section-number { color: var(--atc-green); font-size: 56px; font-weight: 800; line-height: 1; }
.prose { max-width: 1060px; }
.prose p, .prose li { color: #35483e; font-size: 18px; }
.prose ul { padding-left: 24px; }

.faq { background: var(--atc-green-deep); color: #fff; }
.faq .eyebrow { color: var(--atc-lime); }
.faq-list { display: grid; grid-template-columns: repeat(2, 1fr); gap: 14px; }
.faq details { padding: 18px; border: 1px solid rgba(255,255,255,.25); }
.faq summary { font-weight: 800; cursor: pointer; }
.cta { padding: 58px 0; background: var(--atc-lime); }
.cta .shell { display: flex; justify-content: space-between; align-items: center; gap: 28px; }
.cta h2 { margin: 0; max-width: 900px; font-size: 38px; }
.cta .eyebrow { color: var(--atc-green-dark); }

footer { padding: 60px 0 92px; color: #fff; background: var(--atc-green-deep); }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr; gap: 50px; }
.footer-grid > div { display: flex; flex-direction: column; align-items: flex-start; gap: 8px; }
.footer-grid img { width: 220px; }
.mobile-call { display: none; }

@media (max-width: 980px) {
  .site-header { min-height: 74px; padding: 0 18px; }
  .brand img { width: 165px; height: 54px; }
  .site-header nav, .site-header > .header-call { display: none; }
  .menu-button { display: block; margin-left: auto; padding: 10px 14px; border: 1px solid rgba(255,255,255,.4); color: #fff; background: transparent; }
  .site-header nav.is-open { display: flex; position: absolute; top: 74px; left: 0; right: 0; padding: 22px; flex-direction: column; align-items: flex-start; background: var(--atc-green-dark); }
  .home-hero { min-height: 650px; }
  .home-hero__media { inset: 0; opacity: .38; }
  .home-hero__media::after { background: rgba(4,42,32,.62); }
  .home-hero__content { padding: 80px 0 150px; }
  .home-hero__stamp { left: 24px; right: auto; }
  .metric-strip__grid, .home-service-grid, .service-grid, .faq-list { grid-template-columns: 1fr; }
  .metric-strip__grid > div { border-right: 0; border-bottom: 1px solid rgba(255,255,255,.18); }
  .home-intro__grid, .page-hero__grid { grid-template-columns: 1fr; }
  .home-intro__image, .home-intro__image img { min-height: 360px; height: 360px; }
  .gallery-grid { grid-template-columns: 1fr 1fr; grid-template-rows: repeat(3, 250px); }
  .gallery-grid figure:first-child { grid-row: auto; grid-column: 1 / 3; }
  .gallery-grid figure:last-child { grid-column: 1 / 3; }
  .content-grid { grid-template-columns: 1fr; }
  .section-number { font-size: 38px; }
  .cta .shell, .footer-grid { display: grid; grid-template-columns: 1fr; }
  body { padding-bottom: 76px; }
  .mobile-call { display: block; position: fixed; left: 12px; right: 12px; bottom: 12px; z-index: 60; opacity: 0; pointer-events: none; transform: translateY(calc(100% + 20px)); transition: opacity .18s ease, transform .18s ease; }
  .mobile-call.is-visible { opacity: 1; pointer-events: auto; transform: translateY(0); }
  .mobile-call a { display: flex; justify-content: center; padding: 15px; color: #fff; background: var(--atc-green-dark); text-decoration: none; font-weight: 900; box-shadow: var(--atc-shadow); }
}

@media (max-width: 620px) {
  .shell { width: min(100% - 30px, 1400px); }
  h1 { font-size: 43px; }
  h2 { font-size: 34px; }
  .home-hero__content > p:not(.eyebrow), .hero-copy { font-size: 18px; }
  .home-intro, .home-services, .home-gallery, .content-section, .service-band, .faq { padding: 58px 0; }
  .section-heading { display: block; }
  .section-heading .text-link { display: inline-block; margin-top: 14px; }
  .home-service-card { min-height: 330px; }
  .gallery-grid { display: grid; grid-template-columns: 1fr; grid-template-rows: repeat(4, 240px); }
  .gallery-grid figure:first-child, .gallery-grid figure:last-child { grid-column: auto; }
  .service-card { grid-template-columns: 100px 1fr; }
}