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HTML 

              
                <div id="appstore-download">
 
  <svg version="1.1" xmlns="http://www.w3.org/2000/svg" width="22" height="26">
    <g transform="scale(.73)" fill="#292E31">
      <path d="M18.128,13.784 C18.099,10.561 20.767,8.993 20.889,8.92 C19.378,6.717 17.036,6.416 16.213,6.392 C14.246,6.185 12.338,7.569 11.336,7.569 C10.314,7.569 8.771,6.412 7.108,6.446 C4.968,6.479 2.966,7.718 1.868,9.642 C-0.398,13.565 1.292,19.33 3.463,22.501 C4.549,24.054 5.818,25.788 7.479,25.727 C9.104,25.66 9.711,24.691 11.672,24.691 C13.615,24.691 14.185,25.727 15.879,25.688 C17.623,25.66 18.721,24.128 19.769,22.561 C21.024,20.781 21.528,19.028 21.548,18.938 C21.507,18.924 18.161,17.647 18.128,13.784 L18.128,13.784 Z"></path>
      <path d="M14.928,4.306 C15.802,3.213 16.4,1.726 16.234,0.217 C14.969,0.273 13.387,1.092 12.476,2.161 C11.67,3.103 10.95,4.647 11.136,6.099 C12.557,6.205 14.016,5.382 14.928,4.306 L14.928,4.306 Z"></path>
    </g>
  </svg>
    Download <strong>Button</strong>
  
</div>
!

CSS 

              
                body {
  background: #fafbfc;
}

#appstore-download {
  padding: 16px 10px 17px 10px;
  font-size: 16px;
  text-align: center;
  font-family: 'Roboto', sans-serif;
  font-weight: 100;
  text-decoration: none;
  color: #292e31;
  border-radius: 5px;
  box-shadow: inset 0 -2px 6px rgba(218,225,230,.2),0 0 0 1px rgba(90,101,112,.05),0 1px 2px   rgba(90,101,112,.22);
  background: #fff;
  outline: 0;
  position: absolute;
  left: 0;
  right: 0;
  margin: auto;
  top: 50%;
  -webkit-transform: translateY(-50%);
  -ms-transform: translateY(-50%);
  transform: translateY(-50%);
  max-width: 180px;
  cursor: pointer;
}

#appstore-download svg {
  margin: 0 2px -8px 0;
}

#appstore-download:hover g {
  fill: #1fbbdb;
  transition: .3s;
}

#appstore-download:active {
  box-shadow: inset 0 1px 0 rgba(212,220,227,.7),inset 0 0 1px #d4dce3,0 1px 0 #fff;
  background: #f5f7f8;
}
!

JS
!
999px

Console