style.css

@import url("https://fonts.googleapis.com/css2?family=Poppins:wght@200;300;400;500;600;700;800;900&display=swap");

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

header {
  z-index: 999;
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  align-items: center;
  padding: 15px 200px;
  transition: 0.5s ease;
}

header #navigation {
  position: relative;
}

header #navigation #navigation-items a {
  position: relative;
  color: #fff;
  font-size: 1em;
  font-weight: 500;
  text-decoration: none;
  margin-left: 30px;
  transition: 0.3s ease;
}

header #navigation #nav-items a:hover:before {
  width: 100%;
}

header #navigation a {
  margin-left: 30px;
}

#home {
  padding: 100px 200px;
}

#home {
  position: relative;
  width: 100%;
  min-height: 100vh;
  display: flex;
  justify-content: center;
  flex-direction: column;
  background: #2696e9;
}

#home:before {
  z-index: 777;
  content: "";
  position: absolute;
  background: rgba(3, 96, 251, 0.3);
  width: 100%;
  height: 100%;
  top: 0;
  left: 0;
}

video {
  z-index: 000;
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

#content {
  z-index: 888;
  color: #fff;
  width: 70%;
  margin-top: 50px;
}

@media (max-width: 560px) {
  #home #content h1 {
    font-size: 3em;
    line-height: 60px;
  }
}