:root {
  --bg-dark: #0b1220;
  --bg-card: #121a2f;
  --primary: #3b82f6;
  --primary-soft: #60a5fa;
  --text-main: #e5e7eb;
  --text-soft: #9ca3af;
  --border: #1f2a44;
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: Inter, system-ui, Arial, sans-serif;
  background: linear-gradient(180deg, #0b1220, #020617);
  color: var(--text-main);
  line-height: 1.6;
}

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

header {
  background: rgba(2, 6, 23, 0.9);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 1000;
}

.nav {
  max-width: 1200px;
  margin: auto;
  padding: 16px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav ul {
  list-style: none;
  display: flex;
  gap: 18px;
}

.nav a {
  color: var(--text-soft);
  font-size: 14px;
}

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

.hero {
  padding: 90px 20px;
  background:
    linear-gradient(to bottom, rgba(2,6,23,.85), rgba(2,6,23,.95)),
    url("../img/hero.png") center/cover no-repeat;
}

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

.hero h1 {
  font-size: 42px;
  max-width: 720px;
}

.hero p {
  margin-top: 14px;
  max-width: 650px;
  color: var(--text-soft);
}

.section {
  padding: 70px 20px;
}

.cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 20px;
}

.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  padding: 22px;
  border-radius: 14px;
}

.card h3 {
  margin-bottom: 10px;
}

.card p, .card li {
  color: var(--text-soft);
  font-size: 14px;
}

footer {
  border-top: 1px solid var(--border);
  text-align: center;
  padding: 30px;
  font-size: 13px;
  color: var(--text-soft);
}