Navbar animation on scroll and active slider using HTML, CSS, JS

<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>Document</title>
    <link rel="stylesheet" href="./style.css" />
  </head>
  <body>
    <nav id="navbar">
      <div class="logo" id="navlogo">Navbar</div>
      <div class="links">
        <div id="line"></div>
        <a href="#">Home</a>
        <a href="#">Mountains</a>
        <a href="#">Travel</a>
      </div>
    </nav>
    <section id="home">
      <p class="intothe">Into The</p>
      <p class="mountains">Mountains</p>
    </section>
    <section id="mountains">
      <p class="mountaintitle">Mountains</p>
    </section>
    <section id="travel">
      <p class="traveltitle">Travel</p>
    </section>
  </body>
  <script src="./script.js"></script>
</html>

@import url("https://fonts.googleapis.com/css2?family=Galada&display=swap");
@import url("https://fonts.googleapis.com/css2?family=Galada&family=Paytone+One&display=swap");
* {
  margin: 0;
  padding: 0;
  font-family: sans-serif;
}
#navbar {
  height: 10vh;
  width: 100%;
  display: flex;
  justify-content: space-around;
  align-items: center;
  position: fixed;
  top: 0px;
}
.logo {
  font-family: "Paytone One", sans-serif;
  font-size: 2.5rem;
  color: white;
}
.links {
  position: relative;
  display: flex;
  align-items: center;
  height: 100%;
}
.links a {
  text-decoration: none;
  margin-left: 70px;
  font-size: 1.1rem;
  width: 100px;
  text-align: center;
  color: white;
}
#line {
  position: absolute;
  bottom: 0;
  height: 3px;
  width: 100px;
  background-color: white;
  transition: all 0.3s ease;
  transform: translateX(70px);
}
#home,
#mountains,
#travel {
  height: 100vh;
  width: 100%;
}
#home {
  background: url("./images//mountain.jpg");
  background-position: center;
  background-size: cover;
  display: flex;
  justify-content: center;
  align-items: center;
  color: rgba(255, 255, 255, 0.436);
}
#home p {
  font-family: "Galada", cursive;
  font-weight: 400;
  font-size: normal;
  margin-top: 80px;
  font-size: 4rem;
}
.intothe {
  margin-left: 180px;
  letter-spacing: 5px;
  margin-right: 160px;
}
#mountains,
#travel {
  display: flex;
  justify-content: center;
  align-items: center;
  flex-direction: column;
}
#mountains {
  background: url("./images/mountain3.jpg");
  background-position: center;
  background-size: cover;
}
#travel {
  background: url("./images/mountain2.jpg");
  background-position: center;
  background-size: cover;
}
.mountaintitle,
.traveltitle {
  font-size: 5rem;
  color: rgb(255, 255, 255);
  font-weight: bold;
  font-family: "Galada", cursive;
}

const navbar = document.getElementById("navbar");
const links = document.querySelectorAll(".links a");
const line = document.getElementById("line");
const navlogo = document.getElementById("navlogo");

const homeBottomPixel =
  document.getElementById("home").getBoundingClientRect().bottom - 300;
const mountainsBottomPixel =
  document.getElementById("mountains").getBoundingClientRect().bottom - 300;
const travelBottomPixel =
  document.getElementById("travel").getBoundingClientRect().bottom - 300;

window.addEventListener("scroll", () => {
  let currentScrollPixel = window.scrollY;
  //navbar
  // change navbar
  if (currentScrollPixel > 150) {
    line.style.backgroundColor = "black";
    navbar.style.backgroundColor = "rgba(255,255,255,.7)";
    navlogo.style.color = "black";

    // set all links to color white/black
    links.forEach((link) => {
      link.style.color = "black";
    });
  }
  //   default navbar
  else {
    navbar.style.backgroundColor = "rgba(255,255,255,0)";
    navlogo.style.color = "white";
    links.forEach((link) => {
      link.style.color = "white";
    });
    line.style.backgroundColor = "white";
  }

  // line slider
  if (currentScrollPixel < homeBottomPixel) {
    line.style.transform = "translateX(70px)";
  } else if (
    currentScrollPixel > homeBottomPixel &&
    currentScrollPixel < mountainsBottomPixel
  ) {
    line.style.transform = "translateX(242px)";
  } else {
    line.style.transform = "translateX(415px)";
  }
});