<div class="icon app-store"></div>
html { box-sizing: border-box; }
*, *:before, *:after { box-sizing: inherit; }

html, body { height: 100%; }

body { background: #f2f2f2 linear-gradient(to bottom, rgba(255,255,255,1) 0%, rgba(242,242,242,1) 100%); }

.icon {
  position: absolute;
  top: 50%;
  left: 50%;
  display: block;
  width: 10em;
  height: 10em;
  padding: 1px;
  background: rgba(150,150,150,1);
  border-radius: 35px;
  box-shadow:
    inset 0 7em 10em -5em rgba(255,255,255,0.6),
    0 0.3em 0.5em -0.2em rgba(100,100,100,1),
    0 1em 2em -0.75em rgba(100,100,100,0.75),
    0 1em 3em -0.5em rgba(100,100,100,0.5),
    0 3em 3em -0.25em rgba(100,100,100,0.2);
  transform: translate(-50%,-50%);
}

.app-store {
  background: rgba(53,166,245,1);
  box-shadow:
    inset 0 7em 10em -5em rgba(255,255,255,0.6),
    0 0.3em 0.5em -0.2em rgba(47,131,189,1),
    0 1em 2em -0.75em rgba(47,131,189,0.75),
    0 1em 3em -0.5em rgba(47,131,189,0.5),
    0 3em 3em -0.25em rgba(47,131,189,0.2);
}
.app-store:before {
  content: '';
  position: absolute;
  top: 25%;
  left: 50%;
  display: block;
  width: 2.275em;
  height: 2.275em;
  border: 2px solid rgba(255,255,255,1);
  border-radius: 50%;
  box-shadow:
    inset 0 0.25em 0.25em rgba(53,166,245,1),
    inset 0 0.35em 0.25em rgba(0,0,0,0.1);
  transform: translate(-50%,-50%);
}
.app-store:after {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  display: block;
  width: 2.25em;
  height: 2.275em;
  color: rgb(121,193,244);
  font-size: 220%;
  line-height: 2.5em;
  text-align: center;
  text-shadow:
    0 0.025em rgba(255,255,255,0.5),
    0 -0.025em rgba(6,111,184,0.25);
  background: rgba(255,255,255,1);
  border-radius: 0.25em;
  box-shadow:
    inset 0 -0.025em 0.05em 0em rgba(0,0,0,0.15),
    inset 0 -2.5em 3em -2em rgba(0,0,0,0.2),
    0 0.15em 0.5em 0 rgba(6,111,184,1),
    0 0.75em 0.5em rgba(6,111,184,0.35);
  transform: translate(-50%,-50%);
}

External CSS

This Pen doesn't use any external CSS resources.

External JavaScript

  1. https://cdnjs.cloudflare.com/ajax/libs/jquery/2.1.3/jquery.min.js