:root {
  color-scheme: dark;
  --bg: #06151c;
  --bg-soft: #0b222b;
  --surface: #102c35;
  --line: rgba(194, 238, 226, 0.16);
  --text: #f1fbf8;
  --muted: #a8c3bf;
  --green: #63b84b;
  --cyan: #28a8df;
  --blue: #0b6faf;
  --shadow: 0 24px 80px rgba(0, 0, 0, 0.36);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: "Inter", Arial, sans-serif;
  background:
    radial-gradient(circle at 78% 16%, rgba(40, 168, 223, 0.18), transparent 28rem),
    radial-gradient(circle at 12% 34%, rgba(99, 184, 75, 0.16), transparent 24rem),
    var(--bg);
  color: var(--text);
  line-height: 1.6;
}

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

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 1rem clamp(1rem, 4vw, 4rem);
  background: rgba(6, 21, 28, 0.76);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(18px);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  font-size: 1.05rem;
  font-weight: 800;
  letter-spacing: 0;
}

.brand-mark {
  display: grid;
  width: 2.25rem;
  height: 2.25rem;
  place-items: center;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--green), var(--cyan));
  color: #031016;
  font-weight: 800;
}

.nav {
  display: flex;
  gap: clamp(0.75rem, 2vw, 2rem);
  color: var(--muted);
  font-size: 0.95rem;
  font-weight: 600;
}

.nav a:hover {
  color: var(--text);
}

.header-cta,
.btn {
  display: inline-flex;
  min-height: 2.75rem;
  align-items: center;
  justify-content: center;
  border-radius: 0.5rem;
  font-weight: 800;
  transition: transform 180ms ease, border-color 180ms ease, background 180ms ease;
}

.header-cta {
  padding: 0.65rem 1rem;
  background: rgba(99, 184, 75, 0.14);
  border: 1px solid rgba(99, 184, 75, 0.5);
  color: #d9ffd4;
}

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

.hero {
  display: grid;
  grid-template-columns: minmax(0, 0.95fr) minmax(18rem, 0.8fr);
  gap: clamp(2rem, 6vw, 5rem);
  align-items: center;
  min-height: calc(100vh - 5rem);
  padding: clamp(3rem, 8vw, 7rem) clamp(1rem, 4vw, 4rem) clamp(2rem, 5vw, 4rem);
}

.hero-content {
  max-width: 48rem;
}

.eyebrow,
.section-kicker {
  margin: 0 0 1rem;
  color: #92ec8f;
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

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

h1 {
  margin-bottom: 1rem;
  font-size: clamp(3.8rem, 12vw, 9rem);
  line-height: 0.86;
  letter-spacing: 0;
  background: linear-gradient(95deg, #79c75d 12%, #32b5ef 58%, #effffb 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.hero-lead {
  max-width: 42rem;
  color: #d1e8e3;
  font-size: clamp(1.08rem, 2.2vw, 1.35rem);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.85rem;
  margin-top: 2rem;
}

.btn {
  padding: 0.85rem 1.15rem;
  border: 1px solid transparent;
}

.btn-primary {
  background: linear-gradient(135deg, var(--green), var(--cyan));
  color: #041117;
  box-shadow: 0 16px 50px rgba(40, 168, 223, 0.24);
}

.btn-secondary {
  border-color: rgba(168, 195, 191, 0.32);
  background: rgba(255, 255, 255, 0.05);
}

.hero-media {
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 0.5rem;
  background: var(--surface);
  box-shadow: var(--shadow);
}

.hero-media img {
  width: 100%;
  aspect-ratio: 0.72;
  object-fit: cover;
  object-position: center;
}

.section {
  padding: clamp(3.5rem, 8vw, 7rem) clamp(1rem, 4vw, 4rem);
}

.intro {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(0, 1fr);
  gap: clamp(1rem, 5vw, 4rem);
  align-items: end;
  border-block: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.03);
}

h2 {
  margin-bottom: 1rem;
  font-size: clamp(2rem, 5vw, 4.25rem);
  line-height: 1.02;
  letter-spacing: 0;
}

.intro p:last-child,
.contact-copy p {
  color: var(--muted);
  font-size: 1.08rem;
}

.section-heading {
  max-width: 54rem;
  margin-bottom: 2rem;
}

.product-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1rem;
}

.product-card {
  min-height: 19rem;
  padding: clamp(1.25rem, 3vw, 2rem);
  border: 1px solid var(--line);
  border-radius: 0.5rem;
  background: linear-gradient(180deg, rgba(16, 44, 53, 0.92), rgba(10, 31, 39, 0.92));
}

.product-card h3 {
  margin: 1.4rem 0 0.75rem;
  font-size: 1.55rem;
}

.product-card p {
  color: var(--muted);
}

.icon {
  display: block;
  width: 3.5rem;
  height: 3.5rem;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--green), var(--cyan));
  position: relative;
}

.icon::after {
  position: absolute;
  inset: 1rem;
  border: 2px solid #06151c;
  border-radius: 50% 50% 50% 0;
  content: "";
  transform: rotate(-45deg);
}

.tank::after {
  inset: 0.85rem 1.05rem;
  border-radius: 0.8rem;
  transform: none;
}

.split {
  display: grid;
  grid-template-columns: minmax(16rem, 0.8fr) minmax(0, 1fr);
  gap: clamp(2rem, 6vw, 5rem);
  align-items: center;
  background: #081a22;
}

.split-media {
  overflow: hidden;
  border-radius: 0.5rem;
  border: 1px solid var(--line);
}

.split-media img {
  width: 100%;
  aspect-ratio: 1;
  object-fit: cover;
  object-position: 68% center;
}

.feature-list {
  display: grid;
  gap: 1rem;
  padding: 0;
  margin: 2rem 0 0;
  list-style: none;
  color: #d8ece8;
}

.feature-list li {
  display: flex;
  gap: 0.85rem;
  align-items: flex-start;
}

.feature-list span {
  flex: 0 0 auto;
  width: 0.8rem;
  height: 0.8rem;
  margin-top: 0.45rem;
  border-radius: 50%;
  background: var(--cyan);
  box-shadow: 0 0 0 0.35rem rgba(40, 168, 223, 0.13);
}

.contact {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(18rem, 0.8fr);
  gap: clamp(2rem, 6vw, 5rem);
  align-items: center;
}

.contact-panel {
  display: grid;
  gap: 1rem;
}

.contact-row {
  display: grid;
  gap: 0.35rem;
  padding: 1.25rem;
  border: 1px solid var(--line);
  border-radius: 0.5rem;
  background: rgba(255, 255, 255, 0.05);
}

.contact-row span {
  color: var(--muted);
  font-size: 0.85rem;
  font-weight: 800;
  text-transform: uppercase;
}

.contact-row strong {
  overflow-wrap: anywhere;
  font-size: clamp(1rem, 3vw, 1.3rem);
}

.site-footer {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  padding: 1.5rem clamp(1rem, 4vw, 4rem);
  border-top: 1px solid var(--line);
  color: var(--muted);
}

@media (max-width: 860px) {
  .site-header {
    align-items: flex-start;
  }

  .nav {
    display: none;
  }

  .hero,
  .intro,
  .split,
  .contact {
    grid-template-columns: 1fr;
  }

  .hero {
    min-height: auto;
  }

  .hero-media img {
    aspect-ratio: 1.05;
    object-position: center 32%;
  }

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

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

  .site-footer {
    flex-direction: column;
  }
}

@media (max-width: 520px) {
  .site-header {
    padding-inline: 1rem;
  }

  .brand {
    font-size: 0.95rem;
  }

  .header-cta {
    min-height: 2.4rem;
    padding-inline: 0.75rem;
    font-size: 0.85rem;
  }

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