<section class="light">
    <div class="circle">
        <p>Submit</p>
    </div>
    <div class="circle long">
      <p>Submit</p>
    </div>
</section>

<section class="dark">
    <div class="circle_black">
        <p>Submit</p>
    </div>
    <div class="circle_black long">      
        <p>Submit</p>
    </div>
</section>

<!--
Inspiration : https://codepen.io/lukemeyrick/pen/OJPdGdO
-->
* {
  padding: 0;
  margin: 0;
  box-sizing: border-box;
  font-family: sans-serif;
  font-size: 20px;
}
body {
  display: flex;
  width: 100vw;
  height: 100vh;
  overflow: hidden;
  flex-direction: row;
  align-items: center;
  justify-content: space-around;
}
section.light,
section.dark {
  display: flex;
  width: 50vw;
  height: 100vh;
  align-items: center;
  justify-content: space-around;
}
section.light {
  background-color: #e0e5ec;
}
section.dark {
  background-color: #131419;
}
div.circle,
div.circle_black {
  position: relative;
  display: flex;
  width: 150px;
  height: 150px;
  border-radius: 150px;
  align-items: center;
  justify-content: center;
}
div.circle:before,
div.circle_black:before {
  position: absolute;
  top: 0;
  right: 0;
  bottom: 0;
  left: 0;
  display: block;
  width: 150px;
  height: 150px;
  content: " ";
  cursor: pointer;
  transition: 0.3s ease-out;
  border-radius: 150px;
  filter: blur(7px);
}
div.circle.long,
div.circle_black.long {
  width: 250px;
  height: 100px;
}
div.circle.long:before,
div.circle_black.long:before {
  position: absolute;
  top: 0;
  right: 0;
  bottom: 0;
  left: 0;
  width: 250px;
  height: 100px;
}
div.circle:before {
  box-shadow: 8px 8px 20px #a9a8b7, -8px -8px 20px #fff;
}
div.circle_black:before {
  box-shadow: 8px 8px 20px rgba(0, 0, 0, 0.5),
    -8px -8px 20px rgba(255, 255, 255, 0.2);
}
div.circle:hover:before {
  box-shadow: 8px 8px 20px #a9a8b7, -8px -8px 20px #fff,
    inset -8px -8px 20px #fff, inset 8px 8px 20px #a9a8b7;
}
div.circle_black:hover:before {
  box-shadow: 8px 8px 20px rgba(0, 0, 0, 0.5),
    -8px -8px 20px rgba(255, 255, 255, 0.2), inset 8px 8px 20px rgba(0, 0, 0, 1),
    inset -8px -8px 20px rgba(255, 255, 255, 0.2);
}
div.circle:hover:before,
div.circle_black:hover:before {
  transition: 0.3s ease-in;
  transform: scale(1.05);
}
div.circle p,
div.circle_black p {
  position: relative;
  z-index: 5;
  user-select: none;
  cursor: pointer;
}
div.circle_black {
  color: white;
}
@media (max-width: 700px) {
  body {
    height: auto;
    flex-direction: column;
  }
  section.light,
  section.dark {
    width: 100vw;
    height: 100vh;
  }
}


/*
CSS FOR JUST ONE BUTTON

section.light {
  background-color: #e0e5ec;
}

div.circle {
  position: relative;
  display: flex;
  width: 150px;
  height: 150px;
  border-radius: 150px;
  align-items: center;
  justify-content: center;
}

div.circle:before {
  position: absolute;
  top: 0;
  right: 0;
  bottom: 0;
  left: 0;
  display: block;
  width: 150px;
  height: 150px;
  content: " ";
  cursor: pointer;
  transition: 0.75s ease-out;
  border-radius: 150px;
  filter: blur(7px);
  box-shadow: 8px 8px 20px #a9a8b7, -8px -8px 20px #fff;
}
div.circle_black:hover:before {
  transition: 0.75s ease-in;
  transform: scale(1.1);
}
/*
Welcome to my pen.

This is a little pen about Neumorphism. I got this idea after seeing this pen :
https://codepen.io/lukemeyrick/pen/OJPdGdO

Why not make this button with
the less CSS lines i can.
I also did a Dark Version, because i usually prefer Dark themes.
*/

External CSS

This Pen doesn't use any external CSS resources.

External JavaScript

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