:root {
  --bg: #0d1117;
  --bg-soft: #161b22;
  --text: #e6edf3;
  --muted: #9aa7b3;
  --line: #2a3440;
  --brand: #58a6ff;
  --brand-2: #3fb950;
}

* {
  box-sizing: border-box;
}

html, body {
  margin: 0;
  padding: 0;
  background: radial-gradient(80rem 40rem at 20% -10%, #1f2937 0%, var(--bg) 55%);
  color: var(--text);
  font: 16px/1.6 "Segoe UI", Tahoma, Arial, sans-serif;
}

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

.container {
  width: min(1080px, 92vw);
  margin: 0 auto;
}

.site-header {
  position: sticky;
  top: 0;
  background: rgba(13, 17, 23, 0.85);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--line);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.9rem 0;
}

.brand {
  font-weight: 700;
  letter-spacing: 0.08em;
}

nav {
  display: flex;
  gap: 1.1rem;
}

nav a {
  color: var(--muted);
}

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

.hero {
  padding: 6rem 0 4rem;
}

.kicker {
  color: var(--brand-2);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-weight: 600;
  margin: 0 0 0.75rem;
}

h1 {
  margin: 0;
  font-size: clamp(2rem, 4vw, 3.2rem);
  line-height: 1.15;
}

.lead {
  color: var(--muted);
  max-width: 58ch;
  margin-top: 1rem;
}

.section {
  padding: 3.2rem 0;
  border-top: 1px solid var(--line);
}

.section.alt {
  background: linear-gradient(180deg, rgba(22, 27, 34, 0.45), rgba(22, 27, 34, 0.15));
}

.grid {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 1rem;
}

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

.card {
  border: 1px solid var(--line);
  background: var(--bg-soft);
  border-radius: 12px;
  padding: 1rem;
}

.card h3 {
  margin: 0 0 0.4rem;
}

h2 {
  margin-top: 0;
}

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

.site-footer {
  border-top: 1px solid var(--line);
  padding: 1.2rem 0 2rem;
  color: var(--muted);
}

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

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