nav {
  background: #ffffff;
  padding: 15px;
  text-align: center;
  position: sticky;
  top: 0;
  box-shadow: 0 2px 8px rgba(0,0,0,0.1);
}

body {
  background-color: #f4f6f8;
  color: #222;
}

header {
  background-color: #1f2937;
  color: white;
}

section {
  background-color: white;
}

nav a {
  color: #111827;
  text-decoration: none;
  margin: 0 15px;
  font-weight: bold;
}

nav a:hover {
  text-decoration: underline;
}

.service-card {
  background: #f8f8f8;
  padding: 20px;
  margin: 15px 0;
  border-radius: 8px;
}

footer {
  background: #111827;
  color: white;
  text-align: center;
  padding: 25px;
}

html {
  scroll-behavior: smooth;
}