:root {
  --ink: #101820;
  --ink-soft: #2d3a45;
  --muted: #63717d;
  --line: #d9e0e4;
  --paper: #ffffff;
  --paper-soft: #f4f7f8;
  --paper-blue: #edf5f7;
  --deep: #07121b;
  --deep-2: #0e2431;
  --hydro: #0b7385;
  --hydro-dark: #075766;
  --copper: #b86b3d;
  --green: #457462;
  --gold: #a9863b;
  --radius: 8px;
  --shadow: 0 18px 48px rgba(9, 24, 35, 0.16);
  color-scheme: light;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: Arial, Helvetica, sans-serif;
  color: var(--ink);
  background: var(--paper);
  line-height: 1.55;
  text-rendering: optimizeLegibility;
}

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

a {
  color: inherit;
}

.skip-link {
  position: absolute;
  left: 16px;
  top: -80px;
  z-index: 20;
  padding: 10px 14px;
  background: var(--paper);
  color: var(--ink);
  border-radius: var(--radius);
  text-decoration: none;
}

.skip-link:focus {
  top: 16px;
}

.container {
  width: min(1120px, calc(100% - 40px));
  margin: 0 auto;
}

.site-header {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  width: min(1180px, calc(100% - 40px));
  margin: 0 auto;
  padding: 22px 0;
  color: #ffffff;
}

.brand {
  display: inline-flex;
  align-items: center;
  flex: 0 0 auto;
  text-decoration: none;
}

.brand img {
  width: 168px;
  height: auto;
}

.primary-nav {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  flex-wrap: wrap;
  gap: 8px;
  font-size: 13px;
  font-weight: 700;
}

.primary-nav a {
  padding: 9px 11px;
  border-radius: 999px;
  color: rgba(255, 255, 255, 0.88);
  text-decoration: none;
}

.primary-nav a:hover,
.primary-nav a:focus-visible {
  color: #ffffff;
  background: rgba(255, 255, 255, 0.12);
}

.primary-nav .nav-cta {
  color: #ffffff;
  background: var(--hydro);
}

.primary-nav .nav-cta:hover,
.primary-nav .nav-cta:focus-visible {
  background: var(--hydro-dark);
}

.hero {
  position: relative;
  min-height: 720px;
  display: grid;
  align-items: end;
  overflow: hidden;
  color: #ffffff;
  background: var(--deep);
}

.hero-media,
.hero-overlay {
  position: absolute;
  inset: 0;
}

.hero-media {
  background-image: url("/assets/foster-hero.jpg");
  background-position: center;
  background-size: cover;
  transform: scale(1.01);
}

.hero-overlay {
  background:
    linear-gradient(90deg, rgba(5, 14, 22, 0.9) 0%, rgba(5, 14, 22, 0.72) 42%, rgba(5, 14, 22, 0.34) 100%),
    linear-gradient(180deg, rgba(5, 14, 22, 0.84) 0%, rgba(5, 14, 22, 0.08) 36%, rgba(5, 14, 22, 0.86) 100%);
}

.hero-content {
  position: relative;
  z-index: 1;
  width: min(780px, calc(100% - 40px));
  margin: 0 auto;
  padding: 160px 0 150px;
}

.hero h1 {
  max-width: 760px;
  margin: 0;
  font-size: 58px;
  line-height: 1.02;
  font-weight: 800;
  letter-spacing: 0;
}

.hero-copy {
  max-width: 690px;
  margin: 24px 0 0;
  color: rgba(255, 255, 255, 0.86);
  font-size: 19px;
}

.eyebrow {
  margin: 0 0 14px;
  color: var(--hydro);
  font-size: 13px;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0;
}

.hero .eyebrow,
.cta-band .eyebrow {
  color: #75d0dc;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 32px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  padding: 12px 18px;
  border: 1px solid transparent;
  border-radius: var(--radius);
  font-size: 14px;
  font-weight: 800;
  text-decoration: none;
}

.button-primary {
  color: #ffffff;
  background: var(--hydro);
}

.button-primary:hover,
.button-primary:focus-visible {
  background: var(--hydro-dark);
}

.button-secondary {
  color: #ffffff;
  background: rgba(255, 255, 255, 0.1);
  border-color: rgba(255, 255, 255, 0.34);
}

.button-secondary:hover,
.button-secondary:focus-visible {
  background: rgba(255, 255, 255, 0.18);
}

.button-dark {
  color: #ffffff;
  background: var(--deep-2);
}

.button-dark:hover,
.button-dark:focus-visible {
  background: var(--ink);
}

.hero-proof {
  position: absolute;
  right: calc((100vw - min(1120px, calc(100vw - 40px))) / 2);
  bottom: 48px;
  z-index: 1;
  width: min(360px, calc(100% - 40px));
  padding: 18px 20px;
  border-left: 3px solid #75d0dc;
  background: rgba(7, 18, 27, 0.72);
  backdrop-filter: blur(10px);
}

.hero-proof span {
  display: block;
  margin-bottom: 5px;
  color: #75d0dc;
  font-size: 12px;
  font-weight: 800;
  text-transform: uppercase;
}

.hero-proof strong {
  display: block;
  font-size: 17px;
  line-height: 1.35;
}

.section {
  padding: 86px 0;
}

.section-intro {
  background: var(--paper);
}

.split-intro {
  display: grid;
  grid-template-columns: minmax(0, 0.92fr) minmax(0, 1.08fr);
  gap: 56px;
  align-items: start;
}

.split-intro h2,
.section-heading h2,
.hydro-panel h2,
.cta-content h2 {
  margin: 0;
  color: var(--ink);
  font-size: 36px;
  line-height: 1.13;
  letter-spacing: 0;
}

.intro-copy {
  color: var(--ink-soft);
  font-size: 18px;
}

.intro-copy p {
  margin: 0 0 18px;
}

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

.section-services {
  background: var(--paper-soft);
}

.section-heading {
  max-width: 760px;
  margin-bottom: 34px;
}

.section-heading.compact {
  max-width: 650px;
}

.service-grid,
.hydro-card-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
}

.service-grid.two-up {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.service-card,
.hydro-card,
.diagnostic-band {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--paper);
}

.service-card,
.hydro-card {
  min-height: 270px;
  padding: 28px;
}

.service-card-featured {
  color: #ffffff;
  background: var(--deep-2);
  border-color: var(--deep-2);
}

.service-card h3,
.hydro-card h4,
.diagnostic-band h3 {
  margin: 9px 0 13px;
  color: inherit;
  font-size: 24px;
  line-height: 1.18;
  letter-spacing: 0;
}

.hydro-card h4 {
  font-size: 21px;
}

.service-card p,
.hydro-card p,
.diagnostic-band p {
  margin: 0;
  color: var(--ink-soft);
}

.service-card-featured p {
  color: rgba(255, 255, 255, 0.78);
}

.card-kicker {
  display: block;
  color: var(--hydro);
  font-size: 12px;
  font-weight: 800;
  text-transform: uppercase;
}

.service-card-featured .card-kicker {
  color: #75d0dc;
}

.text-link {
  display: inline-flex;
  margin-top: 22px;
  color: #ffffff;
  font-weight: 800;
  text-decoration: none;
}

.text-link:hover,
.text-link:focus-visible {
  text-decoration: underline;
}

.section-hydro-preview {
  background: var(--paper);
}

.hydro-preview {
  display: grid;
  grid-template-columns: minmax(0, 0.92fr) minmax(0, 1.08fr);
  gap: 34px;
  align-items: stretch;
}

.hydro-preview.reverse {
  grid-template-columns: minmax(0, 1.04fr) minmax(0, 0.96fr);
}

.hydro-image {
  min-height: 420px;
  overflow: hidden;
  border-radius: var(--radius);
  background: var(--paper-soft);
}

.hydro-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.hydro-panel {
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 44px;
  border-radius: var(--radius);
  background: var(--paper-blue);
}

.hydro-panel p {
  color: var(--ink-soft);
}

.metric-row {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
  margin: 24px 0 28px;
}

.metric-row div {
  min-height: 92px;
  padding: 15px;
  border: 1px solid rgba(11, 115, 133, 0.2);
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.68);
}

.metric-row strong {
  display: block;
  color: var(--hydro-dark);
  font-size: 19px;
  line-height: 1.2;
}

.metric-row span {
  display: block;
  margin-top: 5px;
  color: var(--muted);
  font-size: 13px;
}

.section-clients {
  background: var(--paper-soft);
}

.logo-wall {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 14px;
}

.logo-wall img {
  width: 100%;
  height: 104px;
  object-fit: contain;
  padding: 22px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #ffffff;
  filter: grayscale(1);
  opacity: 0.78;
}

.cta-band {
  padding: 58px 0;
  color: #ffffff;
  background: var(--deep-2);
}

.cta-content {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 30px;
}

.cta-content div {
  max-width: 720px;
}

.cta-content h2 {
  color: #ffffff;
}

.cta-content p {
  margin: 14px 0 0;
  color: rgba(255, 255, 255, 0.74);
}

.site-footer {
  color: rgba(255, 255, 255, 0.78);
  background: var(--deep);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr;
  gap: 48px;
  padding: 56px 0;
}

.footer-logo {
  width: 176px;
  height: auto;
  margin-bottom: 18px;
}

.site-footer h2 {
  margin: 0 0 14px;
  color: #ffffff;
  font-size: 14px;
  text-transform: uppercase;
  letter-spacing: 0;
}

.site-footer p {
  margin: 0 0 12px;
}

.site-footer a {
  display: block;
  margin-bottom: 9px;
  color: rgba(255, 255, 255, 0.86);
  text-decoration: none;
}

.site-footer a:hover,
.site-footer a:focus-visible {
  color: #ffffff;
  text-decoration: underline;
}

.footer-bottom {
  display: flex;
  justify-content: space-between;
  gap: 18px;
  width: min(1120px, calc(100% - 40px));
  margin: 0 auto;
  padding: 18px 0 26px;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  font-size: 13px;
}

.footer-bottom a {
  margin: 0;
}

.diagnostic-band {
  display: grid;
  grid-template-columns: 0.78fr 1.22fr;
  gap: 26px;
  align-items: start;
  margin-bottom: 26px;
  padding: 30px;
  border-left: 4px solid var(--hydro);
}

.tag-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 18px;
}

.tag-row span {
  display: inline-flex;
  align-items: center;
  min-height: 28px;
  padding: 5px 10px;
  border-radius: 999px;
  color: var(--ink-soft);
  background: var(--paper-soft);
  font-size: 12px;
  font-weight: 700;
}

.service-group {
  margin-top: 42px;
}

.group-heading {
  max-width: 720px;
  margin-bottom: 20px;
}

.group-heading h3 {
  margin: 0;
  font-size: 28px;
  line-height: 1.18;
}

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

.hydro-card {
  position: relative;
  overflow: hidden;
}

.hydro-card::before {
  content: "";
  position: absolute;
  inset: 0 0 auto;
  height: 4px;
  background: var(--hydro);
}

.accent-iron::before {
  background: var(--copper);
}

.accent-arsenic::before {
  background: var(--hydro);
}

.accent-hardness::before {
  background: var(--gold);
}

.accent-nitrate::before {
  background: var(--green);
}

@media (max-width: 980px) {
  .site-header {
    align-items: flex-start;
    flex-direction: column;
    gap: 14px;
  }

  .primary-nav {
    justify-content: flex-start;
  }

  .hero {
    min-height: 760px;
  }

  .hero-content {
    padding-top: 190px;
  }

  .hero h1 {
    font-size: 44px;
  }

  .hero-proof {
    position: relative;
    right: auto;
    bottom: auto;
    width: min(760px, calc(100% - 40px));
    margin: -120px auto 36px;
  }

  .split-intro,
  .hydro-preview,
  .hydro-preview.reverse,
  .diagnostic-band {
    grid-template-columns: 1fr;
  }

  .service-grid,
  .service-grid.two-up,
  .hydro-card-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .logo-wall {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

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

@media (max-width: 680px) {
  .container,
  .site-header,
  .footer-bottom {
    width: min(100% - 28px, 1120px);
  }

  .site-header {
    padding-top: 16px;
  }

  .brand img {
    width: 142px;
  }

  .primary-nav {
    gap: 5px;
    font-size: 12px;
  }

  .primary-nav a {
    padding: 7px 8px;
  }

  .hero {
    min-height: 790px;
  }

  .hero-content {
    width: min(100% - 28px, 760px);
    padding: 188px 0 152px;
  }

  .hero h1 {
    font-size: 35px;
    line-height: 1.08;
  }

  .hero-copy,
  .intro-copy {
    font-size: 16px;
  }

  .hero-proof {
    width: min(100% - 28px, 760px);
    margin-top: -116px;
  }

  .section {
    padding: 62px 0;
  }

  .split-intro h2,
  .section-heading h2,
  .hydro-panel h2,
  .cta-content h2 {
    font-size: 29px;
  }

  .service-grid,
  .service-grid.two-up,
  .hydro-card-grid,
  .metric-row,
  .logo-wall,
  .footer-grid {
    grid-template-columns: 1fr;
  }

  .service-card,
  .hydro-card {
    min-height: auto;
    padding: 24px;
  }

  .hydro-panel {
    padding: 28px;
  }

  .hydro-image {
    min-height: 300px;
  }

  .cta-content,
  .footer-bottom {
    align-items: flex-start;
    flex-direction: column;
  }
}