:root {
  --bg: #0b0b0b;
  --bg-soft: #121212;
  --text: #e5e7eb;
  --muted: #9ca3af;
  --accent: #22d3ee;
  --light: #f5f7fa;
  --dark-text: #0e0e0e;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: Inter, system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, sans-serif;
  background: #fff;
  color: var(--dark-text);
  line-height: 1.6;
}

a {
  color: inherit;
  text-decoration: underline;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 28px;
}

.container.narrow {
  max-width: 760px;
}

/* HERO */

.hero {
  position: relative;
  height: 36vh;
  min-height: 280px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg);
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(700px 300px at 50% -10%, rgba(34,211,238,0.15), transparent),
    linear-gradient(#0b0b0b, #050505);
}

.hero-content {
  position: relative;
  text-align: center;
  z-index: 1;
}

.logo-svg {
  max-width: 360px;
  width: 100%;
  height: auto;
}

.tagline {
  margin-top: 16px;
  font-size: 13px;
  color: var(--muted);
}

/* SECTIONS */

.section {
  padding: 100px 0;
}

.section.dark {
  background: var(--bg-soft);
  color: var(--text);
}

.section.contact {
  background: var(--light);
}

h2 {
  margin: 0 0 32px;
  font-size: 32px;
}

h3 {
  margin: 0 0 12px;
}

h4 {
  margin: 0 0 6px;
  font-size: 17px;
}

p {
  font-size: 16px;
  margin: 0;
}

/* SPLIT */

.split-grid {
  display: grid;
  grid-template-columns: 1fr 2fr;
  gap: 48px;
}

.split-left h2 {
  position: sticky;
  top: 100px;
}

/* CARDS */

.cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 40px;
  margin-top: 56px;
}

.card {
  position: relative;
  background: #0f0f0f;
  padding: 44px;
  border: 1px solid #1f2933;
}

.card-index {
  position: absolute;
  top: 16px;
  right: 20px;
  font-size: 12px;
  color: var(--muted);
  letter-spacing: 0.12em;
}

/* OPERATIONS */

.ops-block {
  display: grid;
  gap: 28px;
}

.ops-item {
  padding-left: 18px;
  border-left: 2px solid var(--accent);
}

/* FOOTER */

footer {
  padding: 36px 0;
  text-align: center;
  font-size: 13px;
  color: #6b7280;
  border-top: 1px solid #e5e7eb;
}

/* RESPONSIVE */

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

  .split-left h2 {
    position: static;
  }

  .section {
    padding: 80px 0;
  }

  .hero {
    height: 48vh;
  }
}