:root {
  --bg: #061a2d;
  --surface: #0d2b46;
  --surface-light: #133a5c;
  --primary: #0f5f9f;
  --primary-strong: #0d78c9;
  --accent: #4eb5eb;
  --text: #f2f8ff;
  --muted: #b8cbde;
  --line: rgba(176, 205, 229, 0.25);
}

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

html,
body {
  margin: 0;
  padding: 0;
}

body {
  font-family: "Montserrat", Arial, sans-serif;
  background: radial-gradient(circle at top, #123a5c, var(--bg) 55%);
  color: var(--text);
  line-height: 1.6;
  overflow-x: hidden;
}

.container {
  width: min(1100px, 92%);
  margin: 0 auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 25;
  backdrop-filter: blur(10px);
  background: rgba(6, 26, 45, 0.82);
  border-bottom: 1px solid var(--line);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.75rem 0;
}

.brand img {
  height: 56px;
  width: auto;
}

.main-nav {
  display: flex;
  gap: 1.2rem;
}

.main-nav a {
  color: var(--muted);
  text-decoration: none;
  font-weight: 600;
  transition: color 0.2s ease;
}

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

.section {
  padding: 5.5rem 0;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.25fr 1fr;
  gap: 2.5rem;
  align-items: center;
}

.eyebrow {
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--accent);
  font-weight: 700;
  margin: 0 0 0.8rem;
  font-size: 0.84rem;
}

h1,
h2 {
  font-family: "Oswald", Arial, sans-serif;
  margin: 0;
  line-height: 1.1;
  letter-spacing: 0.02em;
}

h1 {
  font-size: clamp(2rem, 5vw, 3.5rem);
  margin-bottom: 1rem;
}

.hero-description {
  color: var(--muted);
  margin-bottom: 1.75rem;
  max-width: 60ch;
}

.hero-cta {
  display: flex;
  gap: 0.9rem;
  flex-wrap: wrap;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  text-decoration: none;
  border-radius: 999px;
  padding: 0.82rem 1.25rem;
  font-weight: 700;
  border: 1px solid transparent;
  transition: all 0.2s ease;
}

.btn-primary {
  background: linear-gradient(135deg, var(--primary), var(--primary-strong));
  color: white;
}

.btn-primary:hover {
  transform: translateY(-1px);
  filter: brightness(1.06);
}

.btn-secondary {
  color: var(--text);
  border-color: var(--line);
}

.btn-secondary:hover {
  border-color: var(--accent);
  color: var(--accent);
}

.hero-card {
  background: linear-gradient(
    145deg,
    rgba(27, 67, 99, 0.8),
    rgba(10, 33, 55, 0.92)
  );
  border: 1px solid var(--line);
  border-radius: 22px;
  padding: 1.8rem 1.5rem;
}

.hero-card h2 {
  margin-bottom: 1rem;
  font-size: 1.7rem;
}

.hero-card ul {
  padding-left: 1rem;
  margin: 0;
  display: grid;
  gap: 0.55rem;
  color: var(--muted);
}

.section-title {
  font-size: clamp(1.7rem, 3.2vw, 2.3rem);
  margin-bottom: 0.8rem;
}

.section-subtitle {
  color: var(--muted);
  margin-top: 0;
  margin-bottom: 2rem;
}

.services-grid,
.systems-grid,
.steps {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1rem;
}

.card {
  background: rgba(13, 43, 70, 0.65);
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 1.2rem;
}

.card h3 {
  margin-top: 0;
  margin-bottom: 0.5rem;
  font-size: 1.1rem;
}

.card p {
  margin: 0;
  color: var(--muted);
}

.section-accent {
  background: linear-gradient(
    180deg,
    rgba(6, 26, 45, 0.2),
    rgba(6, 26, 45, 0.5) 15%,
    rgba(11, 45, 72, 0.65),
    rgba(6, 26, 45, 0.4)
  );
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.site-footer {
  border-top: 1px solid var(--line);
  background: rgba(2, 12, 22, 0.72);
  padding: 3rem 0 3.3rem;
}

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

.footer-grid p {
  color: var(--muted);
}

.contact-links {
  display: grid;
  gap: 0.55rem;
}

.contact-links a {
  color: var(--text);
  text-decoration: none;
  font-weight: 600;
}

.contact-links a:hover {
  color: var(--accent);
}

.snow-layer {
  pointer-events: none;
  position: fixed;
  inset: 0;
  z-index: -1;
  overflow: hidden;
}

.snowflake {
  position: absolute;
  top: -10vh;
  color: rgba(206, 235, 255, 0.85);
  animation-name: fall, sway;
  animation-timing-function: linear, ease-in-out;
  animation-iteration-count: infinite, infinite;
  user-select: none;
}

@keyframes fall {
  from {
    transform: translateY(-12vh);
  }
  to {
    transform: translateY(112vh);
  }
}

@keyframes sway {
  0%,
  100% {
    margin-left: 0;
  }
  50% {
    margin-left: 20px;
  }
}

@media (max-width: 900px) {
  .hero-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 680px) {
  .brand img {
    height: 46px;
  }

  .main-nav {
    gap: 0.7rem;
    font-size: 0.92rem;
  }

  .section {
    padding: 4.2rem 0;
  }
}