Clean (like delete unused, duplicated) this css code, please.
@import url('https://fonts.googleapis.com/css2?family=Poppins:wght@400;500&display=swap');

body {
  margin: 80px 0 0 0;
  font-family: "Poppins", sans-serif;
  color: #dee1e6;
}

nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
}

.logo-image {
  margin-left: -30px;
}


nav {
  background-color: #101419;
  backdrop-filter: blur(5px);
  height: 80px;
  padding: 0 20px;
  display: flex;
  justify-content: center;
  align-items: center;
  max-width: 100%;
  overflow-x: auto;
}

nav ul {
  display: flex;
  justify-content: center;
  align-items: center;
  list-style: none;
  margin: 0;
  padding: 0;
}

nav ul li {
  margin: 0 10px;
}

nav ul li a {
  color: #dee1e6;
  text-decoration: none;
  padding: 10px;
  transition: all 0.3s ease;
  border-radius: 5px;
}

nav ul li a:hover {
  background-color: #94F7C5;
  color: #101419;
}

nav ul li a.active {
  background-color: #78DBA9;
  color: #101419;
  border-radius: 5px;
}


.hero {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 50px;
  background-color: #101419;
}

.hero-text h1 {
  font-size: 3rem;
}

.hero-text p {
  font-size: 1.5rem;
}

.btn1, .btn2 {
  font-size: 1.2rem;
  padding: 10px 20px;
}


.hero-text {
  width: 50%;
  margin-left: 20px;
}

.hero h1 {
margin: 0;
margin-bottom: 10px;
}

.hero p {
margin: 0;
margin-bottom: 20px;
}

.hero-image img {
width: 100%;
border-radius: 10px;
}

.btn1 {
background-color: #78DBA9;
color: #101419;
padding: 10px 2