:root {
  --ink: #0b2430;
  --ink-soft: #143545;
  --teal: #1a6b74;
  --cyan: #3db8c0;
  --cyan-soft: #7ad4da;
  --mist: #e8f2f3;
  --sand: #f4f0e8;
  --white: #ffffff;
  --muted: rgba(11, 36, 48, 0.68);
  --muted-inv: rgba(255, 255, 255, 0.72);
  --line: rgba(11, 36, 48, 0.12);
  --line-inv: rgba(255, 255, 255, 0.14);
  --font-display: "Figtree", "Segoe UI", sans-serif;
  --font-body: "Source Sans 3", "Segoe UI", sans-serif;
  --max: 1120px;
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font-body);
  color: var(--ink);
  background: var(--white);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

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

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

h1,
h2,
h3 {
  font-family: var(--font-display);
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: -0.02em;
  margin: 0 0 0.8rem;
}

p {
  margin: 0 0 1rem;
}

.wrap {
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 1.4rem;
}

/* Header — overlay only on inner pages with .site-header--overlay */
.site-header {
  position: relative;
  z-index: 30;
  padding: 1.35rem 0 1.1rem;
}

.site-header--overlay {
  position: absolute;
  inset: 0 0 auto;
}

.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
}

.brand {
  display: inline-flex;
  align-items: center;
  flex-shrink: 0;
  padding: 0.35rem 0.55rem;
  margin-left: -0.55rem;
  border-radius: 0.4rem;
  background: rgba(7, 24, 32, 0.45);
}

.brand__mark {
  display: none;
  width: 3.25rem;
  height: 3.25rem;
  object-fit: contain;
}

.brand__wordmark {
  display: block;
  height: 3.6rem;
  width: auto;
  max-width: min(420px, 58vw);
  object-fit: contain;
}

@media (max-width: 900px) {
  .brand__wordmark {
    height: 3rem;
  }
}

@media (max-width: 420px) {
  .brand {
    background: transparent;
    padding: 0;
    margin: 0;
  }

  .brand__mark {
    display: block;
  }

  .brand__wordmark {
    display: none;
  }
}

.nav {
  display: flex;
  gap: 1.35rem;
  flex-wrap: wrap;
  justify-content: flex-end;
}

.nav a {
  font-family: var(--font-display);
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: rgba(255, 255, 255, 0.86);
  transition: color 0.2s var(--ease);
}

.nav a:hover,
.nav a[aria-current="page"] {
  color: var(--cyan-soft);
}

.nav-toggle {
  display: none;
  width: 2.6rem;
  height: 2.6rem;
  border: 1px solid rgba(255, 255, 255, 0.35);
  background: transparent;
  color: var(--white);
  cursor: pointer;
}

.nav-toggle span,
.nav-toggle span::before,
.nav-toggle span::after {
  display: block;
  width: 1rem;
  height: 1px;
  margin: 0 auto;
  background: currentColor;
  position: relative;
}

.nav-toggle span::before,
.nav-toggle span::after {
  content: "";
  position: absolute;
  left: 0;
}

.nav-toggle span::before {
  top: -5px;
}

.nav-toggle span::after {
  top: 5px;
}

/* Hero (inner pages / shared bits) */
.hero {
  position: relative;
  min-height: 100vh;
  min-height: 100dvh;
  display: grid;
  align-items: end;
  color: var(--white);
  overflow: hidden;
  isolation: isolate;
  padding: 8rem 0 4.5rem;
}

.hero__bg {
  position: absolute;
  inset: 0;
  background:
    linear-gradient(120deg, rgba(11, 36, 48, 0.88) 0%, rgba(11, 36, 48, 0.55) 48%, rgba(26, 107, 116, 0.45) 100%),
    url("../images/hydroram-hero.png") center / cover no-repeat;
  transform: scale(1.04);
  animation: drift 24s ease-in-out infinite alternate;
  z-index: -2;
}

.hero__wave {
  position: absolute;
  inset: auto 0 0;
  height: 8rem;
  background: linear-gradient(180deg, transparent, rgba(11, 36, 48, 0.55));
  z-index: -1;
  pointer-events: none;
}

.hero__eyebrow {
  font-family: var(--font-display);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--cyan-soft);
  margin: 0 0 1rem;
  opacity: 0;
  transform: translateY(14px);
  animation: rise 0.9s var(--ease) 0.15s forwards;
}

.hero h1 {
  font-size: clamp(2.2rem, 5vw, 3.6rem);
  max-width: 16ch;
  margin-bottom: 1.1rem;
  opacity: 0;
  transform: translateY(16px);
  animation: rise 0.9s var(--ease) 0.3s forwards;
}

.hero__lead {
  max-width: 38rem;
  font-size: 1.12rem;
  color: var(--muted-inv);
  margin-bottom: 2rem;
  opacity: 0;
  transform: translateY(16px);
  animation: rise 0.9s var(--ease) 0.45s forwards;
}

.cta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.8rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 2.85rem;
  padding: 0.7rem 1.35rem;
  font-family: var(--font-display);
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  border: 1px solid transparent;
  transition: transform 0.2s var(--ease), background 0.2s var(--ease), color 0.2s var(--ease),
    border-color 0.2s var(--ease);
}

.btn:hover {
  transform: translateY(-1px);
}

.btn--primary {
  background: var(--cyan);
  color: var(--ink);
}

.btn--primary:hover {
  background: var(--cyan-soft);
}

.btn--ghost {
  border-color: rgba(255, 255, 255, 0.4);
  color: var(--white);
}

.btn--ghost:hover {
  border-color: var(--cyan-soft);
  color: var(--cyan-soft);
}

.btn--dark {
  background: var(--ink);
  color: var(--white);
}

.btn--dark:hover {
  background: var(--ink-soft);
}

.btn--outline {
  border-color: rgba(11, 36, 48, 0.28);
  color: var(--ink);
}

.btn--outline:hover {
  border-color: var(--teal);
  color: var(--teal);
}

/* Stats */
.stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  margin-top: -2.5rem;
  position: relative;
  z-index: 2;
}

.stats article {
  background: var(--white);
  padding: 1.6rem 1.4rem;
}

.stats strong {
  display: block;
  font-family: var(--font-display);
  font-size: clamp(1.5rem, 3vw, 2rem);
  color: var(--teal);
  margin-bottom: 0.35rem;
}

.stats span {
  font-size: 0.95rem;
  color: var(--muted);
}

/* Sections */
.section {
  padding: 5rem 0;
}

.section--mist {
  background: var(--mist);
}

.section--sand {
  background: var(--sand);
}

.section--ink {
  background: var(--ink);
  color: var(--white);
}

.section--ink .muted,
.section--ink .lede {
  color: var(--muted-inv);
}

.eyebrow {
  font-family: var(--font-display);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--teal);
  margin: 0 0 0.75rem;
}

.section--ink .eyebrow {
  color: var(--cyan-soft);
}

.lede {
  font-size: 1.08rem;
  max-width: 42rem;
  color: var(--muted);
}

.lede a,
.prose a {
  color: var(--teal);
  text-decoration: underline;
  text-underline-offset: 0.16em;
}

.section--ink .lede a,
.section--ink .prose a {
  color: var(--cyan-soft);
}

.split {
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 3rem;
  align-items: center;
}

.split__media {
  min-height: 22rem;
  background: center / cover no-repeat;
}

.list-plain {
  list-style: none;
  margin: 1.8rem 0 0;
  padding: 0;
  border-top: 1px solid var(--line);
}

.list-plain li {
  display: grid;
  grid-template-columns: 4.5rem 1fr;
  gap: 1rem;
  padding: 1.1rem 0;
  border-bottom: 1px solid var(--line);
}

.list-plain .idx {
  font-family: var(--font-display);
  font-size: 0.75rem;
  letter-spacing: 0.14em;
  color: var(--teal);
  padding-top: 0.2rem;
}

.section--ink .list-plain {
  border-top-color: var(--line-inv);
}

.section--ink .list-plain li {
  border-bottom-color: var(--line-inv);
}

.list-plain strong {
  display: block;
  font-family: var(--font-display);
  margin-bottom: 0.2rem;
}

.list-plain p {
  margin: 0;
  color: var(--muted);
  font-size: 0.98rem;
}

.section--ink .list-plain p {
  color: var(--muted-inv);
}

/* Example grid */
.example-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.1rem;
  margin-top: 2rem;
}

.example-grid figure {
  margin: 0;
  background: var(--ink-soft);
  overflow: hidden;
}

.example-grid img {
  width: 100%;
  aspect-ratio: 16 / 10;
  object-fit: cover;
  background: #071820;
}

.example-grid figcaption {
  padding: 0.85rem 1rem 1rem;
  font-family: var(--font-display);
  font-size: 0.78rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--muted-inv);
}

/* Page hero */
.page-hero {
  position: relative;
  min-height: 48vh;
  display: grid;
  align-items: end;
  color: var(--white);
  padding: 8rem 0 3rem;
  overflow: hidden;
  isolation: isolate;
}

.page-hero__bg {
  position: absolute;
  inset: 0;
  background: center / cover no-repeat;
  z-index: -2;
  transform: scale(1.03);
  animation: drift 26s ease-in-out infinite alternate;
}

.page-hero__bg::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(120deg, rgba(11, 36, 48, 0.9), rgba(11, 36, 48, 0.55));
}

.page-hero h1 {
  font-size: clamp(2rem, 4.5vw, 3.1rem);
  opacity: 0;
  transform: translateY(14px);
  animation: rise 0.85s var(--ease) 0.1s forwards;
}

.page-hero p {
  max-width: 40rem;
  color: var(--muted-inv);
  font-size: 1.08rem;
  opacity: 0;
  transform: translateY(14px);
  animation: rise 0.85s var(--ease) 0.25s forwards;
}

.prose {
  max-width: 46rem;
}

.prose--wide {
  max-width: 56rem;
}

.prose h2 {
  margin-top: 2.2rem;
  font-size: 1.45rem;
}

.prose h3 {
  margin-top: 1.4rem;
  font-size: 1.1rem;
}

.prose ul {
  padding-left: 1.15rem;
}

.prose li {
  margin-bottom: 0.45rem;
}

.list-cols {
  columns: 2;
  column-gap: 2.4rem;
}

.list-cols li {
  break-inside: avoid;
}

.meta-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.2rem 2rem;
  margin-top: 1.5rem;
}

.meta-grid dt {
  font-family: var(--font-display);
  font-size: 0.72rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--teal);
  margin: 0 0 0.25rem;
}

.meta-grid dd {
  margin: 0 0 0.9rem;
}

.contact-block a {
  color: var(--teal);
}

.site-footer {
  background: #071820;
  color: var(--muted-inv);
  padding: 2.2rem 0;
}

.site-footer .wrap {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
  align-items: center;
}

.site-footer strong {
  color: var(--white);
  font-family: var(--font-display);
  letter-spacing: 0.1em;
  font-size: 0.82rem;
}

.site-footer a {
  color: var(--cyan-soft);
}

.reveal {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.75s var(--ease), transform 0.75s var(--ease);
}

.reveal.is-visible {
  opacity: 1;
  transform: none;
}

@keyframes rise {
  to {
    opacity: 1;
    transform: none;
  }
}

@keyframes drift {
  from {
    transform: scale(1.04) translate3d(0, 0, 0);
  }
  to {
    transform: scale(1.08) translate3d(0, -1.2%, 0);
  }
}

@media (max-width: 900px) {
  .split,
  .stats,
  .example-grid,
  .meta-grid {
    grid-template-columns: 1fr;
  }

  .list-cols {
    columns: 1;
  }

  .stats {
    margin-top: 0;
  }
}

@media (max-width: 760px) {
  .nav-toggle {
    display: grid;
    place-items: center;
  }

  .nav {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(7, 24, 32, 0.97);
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: 1.4rem;
  }

  body.nav-open .nav {
    display: flex;
  }

  .nav a {
    font-size: 1rem;
  }

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

@media (max-width: 520px) {
  .example-grid {
    grid-template-columns: 1fr;
  }
}