body {
  margin: 0;
  font-family: Arial, sans-serif;
  background: #050b12;
  color: white;
}

header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 22px 28px;
  border-bottom: 1px solid #1a2430;
  position: sticky;
  top: 0;
  background: rgba(5, 11, 18, 0.95);
  backdrop-filter: blur(8px);
  z-index: 100;
}

.logo {
  font-size: 22px;
  font-weight: 700;
  color: #22c55e;
}

nav a {
  margin-left: 24px;
  color: #a7b4c2;
  text-decoration: none;
  font-size: 15px;
}

nav a:hover {
  color: white;
}

.hero {
  padding: 90px 24px 70px;
  text-align: center;
}

.hero h1 {
  font-size: 60px;
  line-height: 1.05;
  max-width: 900px;
  margin: 0 auto 18px;
}

.hero p {
  color: #9fb0c0;
  font-size: 22px;
  margin: 0;
}

.section {
  padding: 20px 24px 50px;
}

.section h2 {
  margin: 0 0 22px;
  font-size: 24px;
}

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 18px;
}

.card {
  background: linear-gradient(180deg, #0b1730 0%, #0a1427 100%);
  border: 1px solid #14233a;
  padding: 24px 18px;
  border-radius: 16px;
  min-height: 180px;
  box-sizing: border-box;
  transition: transform 0.18s ease, border-color 0.18s ease, box-shadow 0.18s ease;
}

.card:hover {
  transform: translateY(-4px);
  border-color: #1f8f53;
  box-shadow: 0 10px 24px rgba(0, 0, 0, 0.28);
}

.card h3 {
  font-size: 18px;
  line-height: 1.3;
  margin: 0 0 18px;
}

.card p {
  color: #9fb0c0;
  font-size: 14px;
  margin: 0 0 16px;
}

.card a {
  color: #22c55e;
  text-decoration: none;
  font-weight: 600;
}

.card a:hover {
  text-decoration: underline;
}

footer {
  text-align: center;
  padding: 34px 20px;
  border-top: 1px solid #1a2430;
  color: #728195;
  margin-top: 20px;
}

@media (max-width: 900px) {
  .hero h1 {
    font-size: 44px;
  }

  .hero p {
    font-size: 18px;
  }
}

@media (max-width: 640px) {
  header {
    flex-direction: column;
    align-items: flex-start;
    gap: 14px;
  }

  nav a {
    margin-left: 0;
    margin-right: 18px;
  }

  .hero {
    padding: 64px 20px 50px;
  }

  .hero h1 {
    font-size: 34px;
  }

  .hero p {
    font-size: 16px;
  }
}