:root {
  --text: #2d3640;
  --muted: #586570;
  --bg: #ffffff;
  --bg-muted: rgba(93, 103, 106, 0.1);
  --line: #dde3e8;
  --accent: #6a73da;
  --accent-dark: #5d676a;
  --container: min(1120px, calc(100vw - 2.5rem));
  --radius: 8px;
  --shadow: 0 10px 24px rgba(33, 43, 54, 0.12);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: "Open Sans", sans-serif;
  color: var(--text);
  background: var(--bg);
  line-height: 1.6;
}

.container {
  width: var(--container);
  margin: 0 auto;
}

h1,
h2,
h5 {
  font-family: "Muli", sans-serif;
  margin: 0;
}

h1 {
  font-size: clamp(2.2rem, 6vw, 4rem);
  font-weight: 700;
  letter-spacing: 0.08em;
}

h2 {
  font-size: clamp(1.5rem, 3.2vw, 2.2rem);
  font-weight: 700;
}

h5 {
  font-size: 0.85rem;
  letter-spacing: 0.17em;
  text-transform: uppercase;
  color: var(--accent-dark);
}

p {
  margin: 0;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 30;
  background: rgba(255, 255, 255, 0.96);
  border-bottom: 1px solid var(--line);
}

.header-inner {
  min-height: 74px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.brand {
  text-decoration: none;
  color: var(--text);
  font-family: "Muli", sans-serif;
  font-size: 1.5rem;
  font-weight: 700;
}

.brand span {
  font-weight: 300;
}

.site-nav {
  display: flex;
  gap: 1.25rem;
}

.site-nav a {
  text-decoration: none;
  color: var(--text);
  font-weight: 600;
  font-size: 0.95rem;
}

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

.menu-toggle {
  display: none;
  width: 42px;
  height: 42px;
  border: 1px solid var(--line);
  background: #fff;
  border-radius: 6px;
  padding: 0;
}

.menu-toggle span {
  display: block;
  width: 18px;
  height: 2px;
  margin: 0 auto;
  background: var(--text);
}

.menu-toggle span + span {
  margin-top: 5px;
}

.hero {
  min-height: min(72vh, 620px);
  position: relative;
  display: grid;
  align-items: center;
  background-image: url("assets/images/hero-atlantic.webp");
  background-size: cover;
  background-position: center;
}

.hero-overlay {
  position: absolute;
  inset: 0;
  background: rgba(93, 103, 106, 0.74);
}

.hero-inner {
  position: relative;
  text-align: center;
  max-width: 840px;
  z-index: 1;
}

.hero h1 {
  color: #fff;
}

.hero-lead {
  margin: 0.9rem auto 0;
  max-width: 700px;
  color: rgba(255, 255, 255, 0.92);
  font-size: clamp(1rem, 2.1vw, 1.2rem);
}

.section {
  padding: 5rem 0;
}

.section-muted {
  background: var(--bg-muted);
}

.section-heading {
  max-width: 920px;
  margin: 0 auto;
  text-align: center;
}

.section-heading p {
  margin-top: 0.9rem;
  color: var(--muted);
}

.image-row {
  margin-top: 2rem;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1rem;
}

.image-row img {
  width: 100%;
  height: 240px;
  object-fit: cover;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.equipment-grid {
  margin-top: 2rem;
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 0.8rem;
  align-items: stretch;
}

.equipment-grid article {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  min-height: 82px;
  padding: 1rem;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  font-weight: 600;
  background: #fff;
  line-height: 1.35;
}

.software-grid {
  margin-top: 2rem;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1rem;
}

.software-card {
  border-radius: var(--radius);
  overflow: hidden;
  background: #fff;
  border: 1px solid var(--line);
}

.software-card img {
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
}

.software-card p {
  padding: 0.95rem;
  color: var(--muted);
}

.energy-layout {
  display: grid;
  grid-template-columns: 0.82fr 1.18fr;
  gap: 1.6rem;
  align-items: stretch;
  padding: 0.4rem 0;
}

.energy-image {
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  min-height: 390px;
  max-width: 560px;
  width: 100%;
  margin: 0.55rem auto;
  background-image: url("assets/images/energy-transformer.webp");
  background-size: cover;
  background-position: center;
}

.energy-copy {
  padding: 0.35rem 0;
}

.energy-copy p {
  margin-top: 0.8rem;
  color: var(--muted);
}

.energy-items {
  margin-top: 1rem;
  display: grid;
  gap: 0.7rem;
}

.energy-items article {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 0.9rem;
  background: #fff;
}

.energy-items h5 {
  font-size: 0.95rem;
  letter-spacing: 0.06em;
}

.site-footer {
  border-top: 1px solid var(--line);
  padding: 3rem 0 1.5rem;
  background: #fff;
}

.footer-inner {
  text-align: center;
}

.footer-inner p {
  margin-top: 0.4rem;
}

.footer-inner a {
  color: var(--text);
  text-decoration: none;
}

.footer-bottom {
  margin-top: 1.2rem;
  text-align: center;
  color: #7a8792;
  font-size: 0.9rem;
}

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

.js .reveal-up {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 0.5s ease, transform 0.5s ease;
}

.js .reveal-up.in-view {
  opacity: 1;
  transform: translateY(0);
}

@media (max-width: 980px) {
  .equipment-grid,
  .software-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .energy-layout {
    grid-template-columns: 1fr;
  }

  .energy-image {
    min-height: 320px;
  }
}

@media (max-width: 760px) {
  .hero {
    min-height: min(36vh, 310px);
  }

  .menu-toggle {
    display: inline-block;
  }

  .site-nav {
    position: absolute;
    top: calc(100% + 8px);
    left: 1.25rem;
    right: 1.25rem;
    background: #fff;
    border: 1px solid var(--line);
    border-radius: var(--radius);
    padding: 0.9rem;
    box-shadow: var(--shadow);
    flex-direction: column;
    gap: 0.7rem;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-6px);
    transition: opacity 0.2s ease, transform 0.2s ease, visibility 0.2s ease;
  }

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

  .image-row,
  .equipment-grid,
  .software-grid {
    grid-template-columns: 1fr;
  }

  .section {
    padding: 3.5rem 0;
  }
}