:root {
  --ink: #123145;
  --muted: #517080;
  --blue: #126b9a;
  --teal: #17b6b3;
  --green: #5f8f75;
  --sand: #d8c7a3;
  --bg: #f7fafc;
  --panel: #ffffff;
  --line: #d8e6eb;
  --soft: #e8f7f5;
  --shadow: 0 18px 45px rgba(18, 49, 69, .11);
  --radius: 8px;
  --header-height: 82px;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: var(--header-height);
  overflow-x: hidden;
}

body {
  margin: 0;
  color: var(--ink);
  background: var(--bg);
  line-height: 1.6;
  overflow-x: hidden;
}

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

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

button,
input,
textarea {
  font: inherit;
}

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

.section {
  padding: 92px 0;
}

.skip-link {
  position: fixed;
  left: 16px;
  top: 16px;
  z-index: 20;
  transform: translateY(-150%);
  padding: 10px 14px;
  background: var(--ink);
  color: #fff;
  border-radius: var(--radius);
}

.skip-link:focus {
  transform: translateY(0);
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  min-height: var(--header-height);
  background: rgba(247, 250, 252, .92);
  border-bottom: 1px solid rgba(216, 230, 235, .8);
  backdrop-filter: blur(18px);
}

.nav {
  min-height: var(--header-height);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.brand img {
  width: 220px;
  height: auto;
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: 6px;
}

.nav-menu a {
  min-height: 42px;
  display: inline-flex;
  align-items: center;
  padding: 0 14px;
  border-radius: var(--radius);
  color: var(--muted);
  font-weight: 700;
  font-size: .95rem;
}

.nav-menu a:hover,
.nav-menu a:focus-visible {
  color: var(--ink);
  background: var(--soft);
  outline: 0;
}

.nav-toggle {
  display: none;
  width: 44px;
  height: 44px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #fff;
  padding: 10px;
}

.nav-toggle span {
  display: block;
  height: 2px;
  margin: 5px 0;
  background: var(--ink);
  transition: transform .2s ease, opacity .2s ease;
}

.nav-open .nav-toggle span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

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

.nav-open .nav-toggle span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

.hero {
  padding: 86px 0 92px;
  background:
    linear-gradient(115deg, rgba(232, 247, 245, .95), rgba(247, 250, 252, .78) 46%, rgba(221, 239, 232, .72)),
    radial-gradient(circle at 85% 18%, rgba(23, 182, 179, .16), transparent 34%);
  overflow: hidden;
}

.hero-grid,
.two-column,
.overview-grid,
.capability-grid,
.contact-grid,
.trust-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: 56px;
  align-items: center;
}

.eyebrow {
  margin: 0 0 14px;
  color: var(--blue);
  font-size: .82rem;
  font-weight: 800;
  letter-spacing: .12em;
  text-transform: uppercase;
}

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

h1 {
  max-width: 760px;
  margin-bottom: 22px;
  font-size: clamp(2.55rem, 6vw, 4.15rem);
  line-height: .98;
  letter-spacing: 0;
}

h2 {
  margin-bottom: 18px;
  font-size: clamp(2rem, 4vw, 3.15rem);
  line-height: 1.06;
  letter-spacing: 0;
}

h3 {
  margin-bottom: 10px;
  font-size: 1.12rem;
  line-height: 1.25;
}

.hero-text,
.overview-grid p,
.rich-text p,
.capability-grid > div > p,
.contact-copy p {
  color: var(--muted);
  font-size: 1.08rem;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 32px;
}

.button {
  min-height: 48px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0 20px;
  border: 1px solid transparent;
  border-radius: var(--radius);
  font-weight: 800;
  cursor: pointer;
  transition: transform .2s ease, box-shadow .2s ease, background .2s ease;
}

.button:hover,
.button:focus-visible {
  transform: translateY(-1px);
  outline: 0;
}

.button-primary {
  background: var(--blue);
  color: #fff;
  box-shadow: 0 14px 30px rgba(18, 107, 154, .25);
}

.button-primary:hover,
.button-primary:focus-visible {
  background: #0d5d88;
}

.button-secondary {
  background: #fff;
  color: var(--ink);
  border-color: var(--line);
}

.hero-visual {
  min-height: 480px;
  display: grid;
  place-items: center;
}

.system-map {
  position: relative;
  width: min(100%, 500px);
  aspect-ratio: 1 / 1;
  border: 1px solid rgba(18, 107, 154, .15);
  border-radius: 50%;
  background:
    linear-gradient(160deg, rgba(255, 255, 255, .9), rgba(232, 247, 245, .6)),
    repeating-linear-gradient(90deg, transparent 0 38px, rgba(18, 107, 154, .06) 38px 39px),
    repeating-linear-gradient(0deg, transparent 0 38px, rgba(18, 107, 154, .06) 38px 39px);
  box-shadow: var(--shadow);
}

.system-map::before {
  content: "";
  position: absolute;
  inset: 12%;
  border: 28px solid rgba(18, 107, 154, .08);
  border-radius: 50%;
}

.node,
.flow,
.reservoir,
.plant,
.supply {
  position: absolute;
}

.node {
  width: 18px;
  height: 18px;
  border: 4px solid #fff;
  border-radius: 50%;
  background: var(--teal);
  box-shadow: 0 8px 22px rgba(18, 49, 69, .18);
}

.node-a { left: 24%; top: 24%; }
.node-b { right: 20%; top: 30%; background: var(--green); }
.node-c { left: 30%; bottom: 22%; background: var(--blue); }
.node-d { right: 26%; bottom: 28%; background: var(--sand); }

.flow {
  height: 14px;
  border-radius: 999px;
  background: linear-gradient(90deg, var(--blue), var(--teal));
  opacity: .35;
  transform-origin: left center;
}

.flow-one {
  width: 230px;
  left: 26%;
  top: 32%;
  transform: rotate(12deg);
}

.flow-two {
  width: 250px;
  left: 27%;
  top: 57%;
  transform: rotate(-18deg);
}

.flow-three {
  width: 165px;
  left: 48%;
  top: 49%;
  transform: rotate(82deg);
}

.reservoir,
.plant,
.supply {
  width: 128px;
  min-height: 82px;
  display: grid;
  place-items: center;
  padding: 16px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(255, 255, 255, .92);
  color: var(--ink);
  font-weight: 800;
  box-shadow: 0 12px 30px rgba(18, 49, 69, .12);
}

.reservoir { left: 8%; top: 39%; }
.plant { right: 12%; top: 42%; }
.supply { left: 38%; bottom: 8%; }

.overview,
.services,
.trust {
  background: #fff;
}

.highlight-grid,
.service-grid,
.principles {
  display: grid;
  gap: 18px;
}

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

.highlight,
.service-card,
.principles article,
.contact-form {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--panel);
}

.highlight,
.service-card,
.principles article {
  padding: 26px;
}

.highlight p,
.service-card p,
.principles p,
.capability-item p {
  margin-bottom: 0;
  color: var(--muted);
}

.icon {
  display: inline-grid;
  place-items: center;
  width: 42px;
  height: 42px;
  margin-bottom: 20px;
  border-radius: 50%;
  background: var(--soft);
  color: var(--blue);
  font-weight: 900;
}

.about {
  background:
    linear-gradient(90deg, rgba(232, 247, 245, .8), rgba(247, 250, 252, .95)),
    linear-gradient(180deg, #fff, #f7fafc);
}

.rich-text {
  padding-left: 34px;
  border-left: 4px solid var(--teal);
}

.section-heading {
  max-width: 780px;
  margin-bottom: 34px;
}

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

.service-card {
  min-height: 210px;
  transition: transform .2s ease, box-shadow .2s ease;
}

.service-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow);
}

.capabilities {
  background: linear-gradient(135deg, #123145, #145a73);
  color: #fff;
}

.capabilities .eyebrow,
.capabilities p {
  color: #d8f2ef;
}

.capability-list {
  display: grid;
  gap: 16px;
}

.capability-item {
  display: grid;
  grid-template-columns: 22px 1fr;
  gap: 16px;
  align-items: start;
  padding: 20px;
  border: 1px solid rgba(255, 255, 255, .18);
  border-radius: var(--radius);
  background: rgba(255, 255, 255, .07);
}

.capability-item span {
  width: 22px;
  height: 22px;
  margin-top: 3px;
  border-radius: 50%;
  background: var(--teal);
  box-shadow: inset 0 0 0 6px rgba(255, 255, 255, .36);
}

.trust-grid {
  align-items: start;
}

.contact {
  background:
    linear-gradient(180deg, rgba(232, 247, 245, .55), rgba(247, 250, 252, 1));
}

address {
  display: grid;
  gap: 8px;
  margin-top: 30px;
  font-style: normal;
  color: var(--muted);
}

address strong {
  color: var(--ink);
}

.contact-form {
  display: grid;
  gap: 16px;
  padding: 28px;
  box-shadow: var(--shadow);
}

.form-note,
.form-status {
  margin-bottom: 0;
  color: var(--muted);
  font-size: .94rem;
}

.contact-form label {
  display: grid;
  gap: 7px;
  color: var(--ink);
  font-weight: 800;
}

.contact-form input,
.contact-form textarea {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #fbfdfe;
  color: var(--ink);
  padding: 12px 14px;
  resize: vertical;
}

.contact-form input:focus,
.contact-form textarea:focus {
  border-color: var(--blue);
  outline: 3px solid rgba(23, 182, 179, .2);
}

.contact-form .invalid input,
.contact-form .invalid textarea {
  border-color: #b42318;
}

.error-message {
  display: none;
  color: #b42318;
  font-size: .88rem;
  font-weight: 700;
}

.invalid .error-message {
  display: block;
}

.site-footer {
  padding: 28px 0;
  border-top: 1px solid var(--line);
  background: #fff;
}

.footer-grid {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.footer-brand img {
  width: 190px;
}

.site-footer p {
  max-width: 560px;
  margin: 0;
  color: var(--muted);
  font-size: .92rem;
}

@media (max-width: 900px) {
  .section {
    padding: 72px 0;
  }

  .hero-grid,
  .two-column,
  .overview-grid,
  .capability-grid,
  .contact-grid,
  .trust-grid {
    grid-template-columns: 1fr;
    gap: 34px;
  }

  .hero {
    padding: 70px 0 76px;
  }

  .hero-visual {
    min-height: 390px;
  }

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

  .rich-text {
    padding-left: 24px;
  }
}

@media (max-width: 720px) {
  :root {
    --header-height: 74px;
  }

  .wrap {
    width: min(calc(100% - 28px), 1120px);
  }

  .brand img {
    width: 184px;
  }

  .nav-toggle {
    display: block;
  }

  .nav-menu {
    position: absolute;
    left: 14px;
    right: 14px;
    top: calc(100% + 8px);
    display: grid;
    gap: 4px;
    padding: 12px;
    border: 1px solid var(--line);
    border-radius: var(--radius);
    background: #fff;
    box-shadow: var(--shadow);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-8px);
    transition: opacity .2s ease, transform .2s ease, visibility .2s ease;
  }

  .nav-open .nav-menu {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
  }

  .nav-menu a {
    min-height: 48px;
  }

  .hero {
    padding: 42px 0 58px;
  }

  .eyebrow {
    font-size: .74rem;
    overflow-wrap: anywhere;
  }

  h1 {
    font-size: 2.45rem;
  }

  h2 {
    font-size: 2rem;
  }

  .hero-actions,
  .button {
    width: 100%;
  }

  .hero-visual {
    min-height: 320px;
  }

  .system-map {
    width: min(100%, 340px);
  }

  .reservoir,
  .plant,
  .supply {
    width: 104px;
    min-height: 68px;
    padding: 12px;
    font-size: .86rem;
  }

  .flow-one {
    width: 155px;
  }

  .flow-two {
    width: 165px;
  }

  .flow-three {
    width: 110px;
  }

  .highlight-grid,
  .service-grid,
  .principles {
    grid-template-columns: 1fr;
  }

  .service-card {
    min-height: auto;
  }

  .contact-form {
    padding: 20px;
  }

  .footer-grid {
    display: grid;
  }
}