Parallax Effect

@import url('https://fonts.googleapis.com/css2?family=Red+Hat+Text:wght@400;700&display=swap');
:root{
--color: #333; 
}
body {
  font-family: 'Red Hat Text', sans-serif;
}
.container {
  text-align: center;
  color: var(--color);
  width: 100%;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  background-image: url(https://images.unsplash.com/photo-1519120944692-1a8d8cfc107f?ixlib=rb-1.2.1&ixid=MnwxMjA3fDB8MHxwaG90by1wYWdlfHx8fGVufDB8fHx8&auto=format&fit=crop&w=872&q=80);
  background-size: cover;
  background-position: center;
  
/*  this is where the magic happens:  */
  background-attachment: fixed;
}
h1 {
  font-weight: 700;
  font-size: 3rem;
}
p {
  max-width: 52ch;
  line-height: 1.5;
  padding: 1em;
}
a {
  display: inline-block;
  padding: 1em 3.5em;
  background-color: var(--color);
  color: white;
  text-decoration: none;
  text-transform: uppercase;
  border-radius: 0.3em;
  font-weight: 700;
  letter-spacing: .5px;
  font-size: .875rem;
}
.blank,
.other {
  width: 100%;
  min-height: 60vh;
  background-color: var(--color);
}
.second {
  background-image:url(https://images.unsplash.com/photo-1514496959998-c01c40915c5f?ixlib=rb-1.2.1&ixid=MnwxMjA3fDB8MHxwaG90by1wYWdlfHx8fGVufDB8fHx8&auto=format&fit=crop&w=1740&q=80);
  background-attachment: fixed;
  height: 1200px;
}
h3 {
  font-weight: 700;
  font-size: 1.6rem;
  margin-top: 1em;
}
.card > a {
  margin-bottom: 2em;
}
.item {
  display: flex;
  max-width: 320px;
  background-color: white;;
  flex-direction: column;
  align-items: center;
  border-radius: .5em;
  -webkit-box-shadow: 0px 29px 38px -15px rgba(0,0,0,0.43);
  -moz-box-shadow: 0px 29px 38px -15px rgba(0,0,0,0.43);
  box-shadow: 0px 29px 38px -15px rgba(0,0,0,0.43);
}
.img {
  width: 90%;
  height: 200px;
  background-color: lightgrey;
  background-size: cover;
  background-position: center;
  margin-top: 20px;
  border-radius: .3em;;
}
.img-first {
  background-image: url(https://images.unsplash.com/photo-1522163182402-834f871fd851?ixlib=rb-1.2.1&ixid=MnwxMjA3fDB8MHxwaG90by1wYWdlfHx8fGVufDB8fHx8&auto=format&fit=crop&w=1606&q=80);
}
.img-second {
  background-image: url(https://images.unsplash.com/photo-1628746404106-4d3843b231b3?ixlib=rb-1.2.1&ixid=MnwxMjA3fDB8MHxzZWFyY2h8NHx8Y2F2aW5nfGVufDB8fDB8fA%3D%3D&auto=format&fit=crop&w=900&q=60);
}
.img-third {
  background-image: url(https://images.unsplash.com/photo-1632853073412-782bf0279d65?ixlib=rb-1.2.1&ixid=MnwxMjA3fDB8MHxwaG90by1wYWdlfHx8fGVufDB8fHx8&auto=format&fit=crop&w=687&q=80);
}
.second {
  flex-direction: row;
  gap: 1.6em;
}