* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: Arial, sans-serif;
  background: #0f172a;
  color: white;
  text-align: center;
}

nav {
  display: flex;
  justify-content: flex-end;
  align-items: center;
  padding: 20px 40px;
}

nav a {
  color: white;
  margin-left: 20px;
  text-decoration: none;
  font-weight: bold;
  transition: color 0.2s ease;
}

nav a:hover,
nav a.active {
  color: #22c55e;
}

section {
  padding: 50px 20px;
}

h1,
h2,
h3 {
  color: white;
  margin-top: 0;
}

p {
  color: #cbd5f5;
  line-height: 1.6;
}

.btn {
  display: inline-block;
  margin-top: 20px;
  padding: 12px 24px;
  background: #22c55e;
  color: black;
  text-decoration: none;
  border-radius: 6px;
  font-weight: bold;
  transition: background 0.2s ease, transform 0.2s ease;
}

.btn:hover {
  background: #16a34a;
  transform: translateY(-2px);
}

footer {
  margin-top: 40px;
  padding: 20px;
  color: #94a3b8;
  font-size: 14px;
}

.container {
  max-width: 1000px;
  margin: 0 auto;
  padding: 0 20px;
}

@media (max-width: 768px) {
  nav {
    justify-content: center;
    flex-wrap: wrap;
    padding: 16px 20px;
  }

  nav a {
    margin: 8px 10px;
  }

  section {
    padding: 40px 16px;
  }
}