* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: Arial, sans-serif;
}

html {
  scroll-behavior: smooth; /* Smooth scrolling */
}

/* Navbar */
nav {
  position: fixed;
  top: 0;
  width: 100%;
  padding: 15px 30px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  background: transparent;
  transition: 0.3s;
  z-index: 1000;
}

nav.scrolled {
  background: #1e3c72;
  box-shadow: 0 4px 8px rgba(0,0,0,0.3);
}

.logo {
  color: white;
  font-size: 24px;
  font-weight: bold;
}

/* Nav Links */
.nav-links {
  list-style: none;
  display: flex;
}

.nav-links li {
  margin-left: 25px;
}

.nav-links a {
  color: white;
  text-decoration: none;
  font-size: 18px;
  transition: 0.3s;
}

.nav-links a:hover,
.nav-links a.active {
  color: #ffd700;
  border-bottom: 2px solid #ffd700;
}

/* Hamburger */
.hamburger {
  display: none;
  flex-direction: column;
  cursor: pointer;
}

.hamburger span {
  height: 3px;
  width: 25px;
  background: white;
  margin: 4px 0;
}

/* Sections */
.hero {
  height: 100vh;
  background: linear-gradient(to right, #1e3c72, #2a5298);
  color: white;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  padding-top: 80px;
}

.section {
  height: 100vh;
  padding: 80px 40px;
  background: #f4f4f4;
}

/* Responsive */
@media (max-width: 768px) {
  .hamburger {
    display: flex;
  }

  .nav-links {
    position: absolute;
    top: 65px;
    right: 0;
    background: #1e3c72;
    flex-direction: column;
    width: 200px;
    display: none;
  }

  .nav-links.show {
    display: flex;
  }

  .nav-links li {
    margin: 15px 0;
    text-align: center;
  }
}