If you are looking to create a floating animation just using CSS, then you are in the right place.

Alternatively, you can visit the CodePen to see the animation in action.

In our example, the key things we need to add are:

transition property to move the element smoothly, over a given duration
@keyframes property which specifies the animation code
animation property which applies an animation between styles
transform property which allows you to move, rotate, scale, and skew elements

In our example, we are using transform: translate([value]); to move the element up and down.

The Code

HTML

<div class="container">
  <div class="logo">
    <a href="https://silvawebdesigns.com/">
      <img src="https://silvawebdesigns.com/silva-circle.png" alt="Silva Web Designs" />
    </a>
  </div>
  <div class="content">
    <h1>Floating CSS Animation</h1>
    <p>Follow Silva Web Designs:</p>
    <p>
      <span><a href="https://twitter.com/silvawebdesigns" target="_blank" rel="noopener noreferrer"><i class="fa fa-twitter"></i></a></span>
      <span><a href="http://instagram.com/silvawebdesigns" target="_blank" rel="noopener noreferrer"><i class="fa fa-instagram"></i></a></span>
      <span><a href="https://www.linkedin.com/company/silvawebdesigns" target="_blank" rel="noopener noreferrer"><i class="fa fa-linkedin"></i></a></span>
    </p>
  </div>
</div>

CSS

@import url('https://fonts.googleapis.com/css2?family=Montserrat:ital,wght@0,500;0,600;1,300&display=swap');

body,
html {
  height: 100%;
  margin: 0;
  padding: 0;
  font-family: "Montserrat", sans-serif;
	background: rgb(71, 71, 181);
	background: -moz-linear-gradient(-45deg, rgba(26, 188, 156, 1) 0%, rgba(71, 71, 181, 1) 100%);
	background: -webkit-linear-gradient(-45deg, rgba(26, 188, 156, 1) 0%, rgba(71, 71, 181, 1) 100%);
	background: linear-gradient(135deg, rgba(26, 188, 156, 1) 0%, rgba(71, 71, 182, 1) 100%);  
  font-weight: 600;
}

h1 {
  font-size: 24px;
  margin: 10px 0 20px 0;
  text-transform: uppercase;
  color: #FFF;
}

p {
  font-size: 16px;
  color: #FFF;
}

span a {
  font-size: 18px;
  color: #FFF;
  text-decoration: none;
  margin: 0 10px;
  transition: all 0.4s ease-in-out;
}

span a:hover {
  color: #FFF;
}

@keyframes float {
	0% {
		box-shadow: 0 5px 15px 0px rgba(0,0,0,0.6);
		transform: translatey(0px);
	}
	50% {
		box-shadow: 0 25px 15px 0px rgba(0,0,0,0.2);
		transform: translatey(-20px);
	}
	100% {
		box-shadow: 0 5px 15px 0px rgba(0,0,0,0.6);
		transform: translatey(0px);
	}
}

.container {
  width: 100%;
  height: 100%;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
}

.logo {
  width: 150px;
  height: 150px;
  box-sizing: border-box;
  border: 5px #20232c solid;
  border-radius: 50%;
  overflow: hidden;
  box-shadow: 0 5px 15px 0px rgba(0, 0, 0, 0.6);
  transform: translatey(0px);
  animation: float 6s ease-in-out infinite;
}

.logo img {
  width: 100%;
  height: auto;
}

.content {
  width: 100%;
  max-width: 600px;
  padding: 20px 40px;
  box-sizing: border-box;
  text-align: center;
}

.fa {
  font-size: 38px;
  margin-top: 20px;
}

And there you have it! A nice, smooth floating animation made purely in CSS. If you need any help, just give us a shout!