:root {
  --ink: #111312;
  --muted: #626763;
  --paper: #f7f4ee;
  --paper-strong: #fffdfa;
  --charcoal: #171b1e;
  --charcoal-2: #22282b;
  --line: rgba(17, 19, 18, 0.14);
  --line-dark: rgba(255, 255, 255, 0.14);
  --green: #25851f;
  --radius: 8px;
  --shadow: 0 24px 70px rgba(17, 19, 18, 0.18);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: Manrope, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

img {
  display: block;
  max-width: 100%;
}

a {
  color: inherit;
  text-decoration: none;
}

.nowrap {
  white-space: nowrap;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 14px clamp(18px, 4vw, 56px);
  background: rgba(247, 244, 238, 0.86);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(18px);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 14px;
  min-width: max-content;
}

.brand img {
  width: auto;
  height: clamp(46px, 5vw, 62px);
}

.brand small {
  display: block;
}

.brand small {
  color: var(--muted);
  font-size: 0.75rem;
  font-weight: 800;
  letter-spacing: 0.02em;
  text-transform: uppercase;
}

.nav {
  display: flex;
  align-items: center;
  gap: clamp(14px, 2vw, 30px);
  color: #3b403c;
  font-size: 0.92rem;
  font-weight: 700;
}

.nav a {
  padding: 8px 0;
}

.menu-toggle {
  display: none;
  width: 46px;
  height: 46px;
  flex: 0 0 46px;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 5px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--paper-strong);
  color: var(--ink);
  cursor: pointer;
}

.menu-toggle span {
  display: block;
  width: 20px;
  height: 2px;
  border-radius: 999px;
  background: currentColor;
  transition: transform 180ms ease, opacity 180ms ease;
}

.site-header.menu-open .menu-toggle span:first-child {
  transform: translateY(7px) rotate(45deg);
}

.site-header.menu-open .menu-toggle span:nth-child(2) {
  opacity: 0;
}

.site-header.menu-open .menu-toggle span:last-child {
  transform: translateY(-7px) rotate(-45deg);
}

.header-call {
  min-width: max-content;
  padding: 11px 16px;
  border: 1px solid var(--ink);
  border-radius: 999px;
  font-weight: 800;
}

.section-dark {
  background: var(--charcoal);
  color: var(--paper-strong);
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.02fr) minmax(340px, 0.98fr);
  gap: clamp(28px, 5vw, 78px);
  align-items: center;
  padding: clamp(34px, 4.2vw, 54px) clamp(18px, 5vw, 72px);
}

.hero-copy {
  display: flex;
  flex-direction: column;
  justify-content: center;
  max-width: 760px;
}

.eyebrow,
.section-kicker {
  margin: 0 0 18px;
  color: var(--green);
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

h1,
h2,
h3,
p {
  margin-top: 0;
}

h1,
h2 {
  font-family: Manrope, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-weight: 800;
  letter-spacing: 0;
}

h1 {
  max-width: 620px;
  margin-bottom: 24px;
  font-size: clamp(2.35rem, 4vw, 4.25rem);
  line-height: 1.05;
}

h2 {
  margin-bottom: 20px;
  font-size: clamp(1.8rem, 3.4vw, 3.5rem);
  line-height: 1.08;
}

h3 {
  margin-bottom: 12px;
  font-size: clamp(1.15rem, 1.7vw, 1.42rem);
  line-height: 1.22;
}

.hero-lead {
  max-width: 560px;
  color: rgba(255, 253, 250, 0.76);
  font-size: clamp(1.04rem, 1.45vw, 1.18rem);
  line-height: 1.55;
}

.hero-actions,
.contact-links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 18px;
}

.btn {
  display: inline-flex;
  min-height: 48px;
  align-items: center;
  justify-content: center;
  padding: 14px 20px;
  border-radius: 999px;
  font-weight: 800;
  transition: transform 180ms ease, background 180ms ease, border-color 180ms ease;
}

.btn:hover {
  transform: translateY(-2px);
}

.btn-primary {
  background: var(--green);
  color: #fff;
}

.btn-secondary {
  border: 1px solid rgba(255, 255, 255, 0.26);
  color: var(--paper-strong);
}

.trust-strip {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 14px;
  margin: 0;
  padding: clamp(20px, 3vw, 34px) clamp(18px, 5vw, 72px);
  background: var(--charcoal);
}

.trust-strip div {
  min-height: 132px;
  padding: clamp(20px, 2.7vw, 32px);
  border: 1px solid var(--line-dark);
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.05);
}

.trust-strip dt {
  color: var(--paper-strong);
  font-size: clamp(1.12rem, 1.5vw, 1.45rem);
  font-weight: 800;
}

.trust-strip dd {
  margin: 8px 0 0;
  color: rgba(255, 253, 250, 0.68);
  font-size: clamp(0.94rem, 1.1vw, 1.05rem);
  line-height: 1.45;
}

.hero-media {
  position: relative;
  height: clamp(380px, 42vw, 520px);
  overflow: hidden;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.hero-media::after {
  position: absolute;
  inset: 0;
  content: "";
  background: linear-gradient(180deg, rgba(17, 19, 18, 0.02), rgba(17, 19, 18, 0.42));
}

.hero-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.hero-card {
  position: absolute;
  right: 22px;
  bottom: 22px;
  z-index: 2;
  width: min(320px, calc(100% - 44px));
  padding: 20px;
  border: 1px solid rgba(255, 255, 255, 0.22);
  border-radius: var(--radius);
  background: rgba(17, 19, 18, 0.78);
  color: #fff;
  backdrop-filter: blur(16px);
}

.hero-card span,
.hero-card strong {
  display: block;
}

.hero-card span {
  color: rgba(255, 255, 255, 0.66);
  font-size: 0.9rem;
}

.hero-card strong {
  margin-top: 6px;
  font-size: 1.35rem;
}

.intro,
.services,
.gallery,
.expert-section,
.fgas-info,
.case-studies,
.quote,
.contact,
.work-principles,
.process {
  padding: clamp(56px, 8vw, 110px) clamp(18px, 5vw, 72px);
}

.intro-grid {
  display: grid;
  grid-template-columns: minmax(260px, 0.82fr) minmax(280px, 1fr);
  gap: clamp(24px, 5vw, 70px);
  align-items: start;
}

.intro p,
.expert-copy p,
.fgas-head p,
.fgas-card p,
.contact-copy p {
  color: var(--muted);
  font-size: clamp(1rem, 1.35vw, 1.14rem);
  line-height: 1.65;
}

.work-principles .section-head h2 {
  color: var(--paper-strong);
}

.proof-band {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
  margin-top: clamp(28px, 4vw, 46px);
}

.proof-band article {
  min-height: 250px;
  padding: clamp(24px, 3.2vw, 40px);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--paper-strong);
}

.proof-band h3 {
  color: var(--charcoal);
}

.number {
  display: inline-block;
  margin-bottom: 24px;
  color: var(--green);
  font-weight: 800;
}

.proof-band p,
.service-card p,
.process-list p,
figcaption {
  color: var(--muted);
  line-height: 1.55;
}

.section-head {
  display: grid;
  grid-template-columns: minmax(220px, 0.58fr) minmax(280px, 1fr);
  gap: clamp(20px, 4vw, 60px);
  align-items: end;
  margin-bottom: clamp(30px, 5vw, 56px);
}

.section-head .eyebrow {
  align-self: start;
}

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

.service-card {
  display: flex;
  min-height: 220px;
  flex-direction: column;
  justify-content: flex-end;
  padding: clamp(22px, 3vw, 34px);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--paper-strong);
}

.service-card-featured {
  grid-column: span 1;
  grid-row: span 1;
  gap: 24px;
  justify-content: space-between;
}

.service-card-featured img {
  height: min(34vw, 430px);
  border-radius: calc(var(--radius) - 2px);
  object-fit: cover;
  object-position: center;
}

.service-card-climate img {
  object-position: center 42%;
}

.related-services {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 1px;
  margin-top: 18px;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
}

.related-services article {
  min-height: 210px;
  padding: clamp(20px, 2.5vw, 28px);
  background: var(--paper-strong);
}

.related-services p {
  color: var(--muted);
  line-height: 1.55;
}

.process {
  border-top: 1px solid var(--line-dark);
}

.process .section-head h2,
.process h3,
.contact h2 {
  color: var(--paper-strong);
}

.process-list {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 1px;
  margin: 0;
  padding: 0;
  list-style: none;
  background: var(--line-dark);
}

.process-list li {
  min-height: 260px;
  padding: clamp(22px, 3vw, 34px);
  background: var(--charcoal);
}

.process-list span {
  display: grid;
  width: 40px;
  height: 40px;
  margin-bottom: 42px;
  place-items: center;
  border: 1px solid rgba(255, 255, 255, 0.22);
  border-radius: 50%;
  color: var(--green);
  font-weight: 800;
}

.process-list strong {
  display: block;
  margin-bottom: 10px;
  color: #fff;
  font-size: 1.1rem;
}

.process-list p {
  color: rgba(255, 253, 250, 0.66);
}

.gallery-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 16px;
}

figure {
  margin: 0;
  overflow: hidden;
  border-radius: var(--radius);
  background: var(--paper-strong);
  box-shadow: 0 1px 0 var(--line);
}

figure.wide {
  grid-column: span 2;
}

figure.portrait {
  grid-row: span 2;
}

figure img {
  width: 100%;
  height: 330px;
  object-fit: cover;
}

figure.wide img {
  height: 430px;
}

figure.portrait img {
  height: 610px;
  object-position: center;
}

figcaption {
  padding: 16px 18px 18px;
  font-size: 0.95rem;
}

.expert-section {
  display: grid;
  grid-template-columns: minmax(300px, 0.9fr) minmax(320px, 1.1fr);
  gap: clamp(28px, 5vw, 78px);
  align-items: center;
  background: var(--paper-strong);
  border-top: 1px solid var(--line);
}

.expert-image {
  min-height: clamp(360px, 42vw, 560px);
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 8px;
  overflow: hidden;
}

.expert-image img {
  width: 100%;
  height: 100%;
  min-height: inherit;
  object-fit: cover;
  object-position: center;
  display: block;
}

.expert-copy {
  max-width: 720px;
}

.expert-copy h2 {
  max-width: 700px;
}

.expert-quote {
  margin: 22px 0 18px;
  color: var(--anthracite);
  font-size: clamp(1.22rem, 2vw, 1.7rem);
  font-weight: 650;
  line-height: 1.34;
}

.fgas-info {
  display: block;
}

.fgas-head h2,
.fgas-card h3 {
  color: var(--paper-strong);
}

.fgas-head {
  max-width: 860px;
}

.fgas-head p,
.fgas-card p {
  color: rgba(255, 255, 255, 0.7);
}

.authority-link {
  display: inline-flex;
  min-height: 48px;
  align-items: center;
  justify-content: center;
  margin-top: 10px;
  padding: 13px 18px;
  border: 1px solid rgba(255, 255, 255, 0.28);
  border-radius: 8px;
  color: var(--paper-strong);
  font-weight: 800;
  transition: border-color 180ms ease, background 180ms ease, transform 180ms ease;
}

.authority-link:hover {
  transform: translateY(-2px);
  border-color: rgba(255, 255, 255, 0.48);
  background: rgba(255, 255, 255, 0.06);
}

.fgas-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
  margin-top: clamp(30px, 4vw, 52px);
}

.fgas-card {
  min-height: 260px;
  padding: clamp(22px, 2.6vw, 34px);
  border: 1px solid rgba(255, 255, 255, 0.18);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.045);
}

.fgas-card span {
  display: inline-block;
  margin-bottom: 46px;
  color: var(--green);
  font-size: 0.9rem;
  font-weight: 850;
}

.fgas-card h3 {
  margin-bottom: 14px;
  font-size: clamp(1.16rem, 1.55vw, 1.5rem);
  line-height: 1.2;
}

.case-studies {
  background: var(--paper);
}

.case-grid {
  display: grid;
  grid-template-columns: minmax(320px, 1.4fr) minmax(220px, 0.8fr) minmax(220px, 0.8fr);
  gap: 16px;
}

.case-card,
.case-note {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--paper-strong);
}

.case-card a {
  display: grid;
  height: 100%;
  grid-template-columns: 0.95fr 1fr;
}

.case-card img {
  width: 100%;
  height: 100%;
  min-height: 360px;
  object-fit: cover;
}

.case-card div,
.case-note {
  padding: clamp(22px, 3vw, 34px);
}

.case-meta {
  margin-bottom: 18px;
  color: var(--green);
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.text-link {
  display: inline-block;
  margin-top: 18px;
  color: var(--green);
  font-weight: 800;
}

.case-note {
  min-height: 300px;
}

.quote {
  background: var(--paper-strong);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.quote blockquote {
  max-width: 980px;
  margin: 0 auto;
  color: var(--charcoal);
  font-size: clamp(1.8rem, 3.9vw, 4rem);
  font-weight: 800;
  line-height: 1.06;
  text-align: center;
}

.contact {
  display: grid;
  grid-template-columns: minmax(280px, 0.9fr) minmax(320px, 0.82fr);
  gap: clamp(28px, 6vw, 86px);
  align-items: start;
}

.contact-copy p {
  color: rgba(255, 253, 250, 0.72);
}

.contact-links a {
  padding: 13px 16px;
  border: 1px solid var(--line-dark);
  border-radius: 999px;
  color: #fff;
  font-weight: 800;
}

.contact-form {
  display: grid;
  gap: 14px;
  padding: clamp(20px, 3vw, 30px);
  border: 1px solid var(--line-dark);
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.05);
}

label {
  display: grid;
  gap: 8px;
  color: rgba(255, 253, 250, 0.78);
  font-size: 0.88rem;
  font-weight: 800;
}

input,
textarea {
  width: 100%;
  border: 1px solid rgba(255, 255, 255, 0.18);
  border-radius: 6px;
  background: rgba(255, 255, 255, 0.06);
  color: #fff;
  font: inherit;
  padding: 13px 13px;
  outline: none;
}

textarea {
  resize: vertical;
}

input:focus,
textarea:focus {
  border-color: var(--green);
}

::placeholder {
  color: rgba(255, 255, 255, 0.42);
}

.form-submit {
  display: inline-flex;
  width: fit-content;
  min-height: 52px;
  align-items: center;
  justify-content: center;
  gap: 14px;
  margin-top: 10px;
  padding: 14px 18px 14px 22px;
  border: 1px solid rgba(255, 255, 255, 0.24);
  border-left: 4px solid var(--green);
  border-radius: 6px;
  background: rgba(255, 255, 255, 0.08);
  color: var(--paper-strong);
  cursor: pointer;
  font: inherit;
  font-weight: 800;
  transition: background 180ms ease, border-color 180ms ease, transform 180ms ease;
}

.form-submit:hover {
  border-color: rgba(255, 255, 255, 0.36);
  background: rgba(255, 255, 255, 0.12);
  transform: translateY(-1px);
}

.form-submit span:last-child {
  display: grid;
  width: 28px;
  height: 28px;
  place-items: center;
  border-radius: 50%;
  background: var(--green);
  color: #fff;
}

.footer {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 12px;
  padding: 26px clamp(18px, 5vw, 72px);
  background: #0f1112;
  color: rgba(255, 253, 250, 0.68);
  font-size: 0.9rem;
}

.article-page {
  background: var(--paper);
}

.article-hero {
  display: grid;
  grid-template-columns: minmax(280px, 1fr) minmax(320px, 0.82fr);
  gap: clamp(28px, 5vw, 72px);
  align-items: center;
  padding: clamp(48px, 7vw, 100px) clamp(18px, 5vw, 72px);
}

.article-hero h1 {
  max-width: 820px;
}

.article-hero img {
  width: 100%;
  height: min(55vw, 620px);
  border-radius: var(--radius);
  object-fit: cover;
}

.back-link {
  display: inline-block;
  margin-bottom: 28px;
  color: rgba(255, 253, 250, 0.72);
  font-size: 0.9rem;
  font-weight: 800;
}

.article-content {
  display: grid;
  grid-template-columns: minmax(240px, 0.35fr) minmax(320px, 0.72fr);
  gap: clamp(28px, 5vw, 72px);
  align-items: start;
  padding: clamp(48px, 7vw, 96px) clamp(18px, 5vw, 72px);
}

.article-facts {
  position: sticky;
  top: 120px;
  padding: 24px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--paper-strong);
}

.article-facts h2 {
  font-size: 1.4rem;
}

.article-facts dl {
  display: grid;
  gap: 18px;
  margin: 0;
}

.article-facts dt {
  color: var(--muted);
  font-size: 0.82rem;
  font-weight: 800;
  text-transform: uppercase;
}

.article-facts dd {
  margin: 4px 0 0;
  font-weight: 800;
}

.article-body {
  max-width: 860px;
}

.article-body h2 {
  margin-top: 44px;
  font-size: clamp(1.6rem, 3vw, 2.6rem);
}

.article-body h2:first-child {
  margin-top: 0;
}

.article-body p {
  color: var(--muted);
  font-size: 1.1rem;
  line-height: 1.72;
}

.article-image {
  margin: 42px 0;
}

.article-image img {
  height: 520px;
}

.article-cta {
  margin-top: 54px;
  padding: clamp(24px, 4vw, 42px);
  border-radius: var(--radius);
  background: var(--charcoal);
  color: var(--paper-strong);
}

.article-cta h2 {
  margin-top: 0;
  color: var(--paper-strong);
}

.reveal {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 600ms ease, transform 600ms ease;
}

.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

@media (max-width: 980px) {
  .site-header {
    align-items: center;
    flex-wrap: wrap;
    gap: 12px;
  }

  .nav {
    display: none;
    order: 4;
    width: 100%;
    padding: 10px 0 2px;
    border-top: 1px solid var(--line);
  }

  .site-header.menu-open .nav {
    display: grid;
    gap: 2px;
  }

  .nav a {
    padding: 13px 0;
    border-bottom: 1px solid rgba(17, 19, 18, 0.08);
  }

  .menu-toggle {
    display: inline-flex;
    margin-left: auto;
  }

  .header-call {
    padding: 10px 13px;
    font-size: 0.9rem;
  }

  .hero,
  .intro-grid,
  .section-head,
  .service-grid,
  .expert-section,
  .fgas-info,
  .contact,
  .case-grid,
  .case-card a,
  .article-hero,
  .article-content {
    grid-template-columns: 1fr;
  }

  .fgas-grid {
    grid-template-columns: 1fr;
  }

  .service-card-featured {
    grid-column: span 1;
    grid-row: span 1;
  }

  .hero {
    min-height: auto;
  }

  .hero-media {
    height: 430px;
  }

  .proof-band,
  .process-list,
  .trust-strip,
  .related-services {
    grid-template-columns: 1fr 1fr;
  }

  .gallery-grid {
    grid-template-columns: 1fr 1fr;
  }

  .article-facts {
    position: static;
  }
}

@media (max-width: 1360px) {
  .header-call {
    display: none;
  }
}

@media (max-width: 640px) {
  .site-header {
    padding: 12px 16px;
  }

  .brand {
    gap: 8px;
  }

  .brand img {
    height: 42px;
  }

  h1 {
    font-size: clamp(2.05rem, 9.4vw, 2.75rem);
    line-height: 1.08;
  }

  h2 {
    font-size: clamp(1.65rem, 8vw, 2.35rem);
    line-height: 1.12;
  }

  .hero {
    padding-top: 30px;
  }

  .hero-media {
    height: 320px;
  }

  .trust-strip,
  .proof-band,
  .process-list,
  .gallery-grid,
  .related-services {
    grid-template-columns: 1fr;
  }

  .trust-strip div,
  .proof-band article,
  .process-list li {
    min-height: auto;
  }

  .number,
  .process-list span {
    margin-bottom: 28px;
  }

  figure.wide {
    grid-column: span 1;
  }

  figure.portrait {
    grid-row: span 1;
  }

  figure img,
  figure.wide img,
  figure.portrait img {
    height: 310px;
  }
}