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

html {
  scroll-behavior: smooth;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  background-color: #0b1220;
  color: #ffffff;
  line-height: 1.6;
}

a {
  text-decoration: none;
  color: inherit;
}

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

.header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 24px 0;
}

.logo {
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: 1px;
}

.header nav {
  display: flex;
  gap: 24px;
}

.header nav a {
  color: #cbd5e1;
  font-size: 0.95rem;
  transition: color 0.2s ease;
}

.header nav a:hover {
  color: #ffffff;
}

.hero {
  padding: 110px 0 100px;
  text-align: center;
  background: linear-gradient(to bottom, #0b1220, #111827);
}

.hero h2 {
  font-size: clamp(2.5rem, 6vw, 4.5rem);
  line-height: 1.1;
  margin-bottom: 20px;
}

.hero p {
  max-width: 680px;
  margin: 0 auto 32px;
  color: #cbd5e1;
  font-size: 1.1rem;
}

.btn {
  display: inline-block;
  background-color: #ffffff;
  color: #0b1220;
  padding: 14px 28px;
  border-radius: 999px;
  font-weight: 700;
  transition: transform 0.2s ease, opacity 0.2s ease;
}

.btn:hover {
  transform: translateY(-2px);
  opacity: 0.95;
}

.section {
  padding: 90px 0;
}

.section h3 {
  text-align: center;
  font-size: 2rem;
  margin-bottom: 20px;
}

.section > .container > p {
  text-align: center;
  max-width: 700px;
  margin: 0 auto;
  color: #cbd5e1;
  font-size: 1.05rem;
}

.features {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-top: 45px;
}

.card {
  background-color: #1e293b;
  padding: 28px;
  border-radius: 18px;
  border: 1px solid rgba(255, 255, 255, 0.06);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.18);
}

.card h4 {
  font-size: 1.15rem;
  margin-bottom: 12px;
}

.card p {
  color: #cbd5e1;
  font-size: 0.98rem;
}

.footer {
  padding: 28px 0 40px;
  text-align: center;
  color: #94a3b8;
  font-size: 0.9rem;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
}

@media (max-width: 768px) {
  .header {
    flex-direction: column;
    gap: 16px;
  }

  .header nav {
    gap: 16px;
    flex-wrap: wrap;
    justify-content: center;
  }

  .hero {
    padding: 80px 0 70px;
  }

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

  .section {
    padding: 70px 0;
  }
}