body { 
  width: 400px; 
  margin: 100px auto; 
  background-color: #f5f5f5; 
}
.file-upload{display:block;text-align:center;font-family: Helvetica, Arial, sans-serif;font-size: 12px;}
.file-upload .file-select{display:block;border: 2px solid #dce4ec;color: #34495e;cursor:pointer;height:40px;line-height:40px;text-align:left;background:#FFFFFF;overflow:hidden;position:relative;}
.file-upload .file-select .file-select-button{background:#dce4ec;padding:0 10px;display:inline-block;height:40px;line-height:40px;}
.file-upload .file-select .file-select-name{line-height:40px;display:inline-block;padding:0 10px;}
.file-upload .file-select:hover{border-color:#34495e;transition:all .2s ease-in-out;-moz-transition:all .2s ease-in-out;-webkit-transition:all .2s ease-in-out;-o-transition:all .2s ease-in-out;}
.file-upload .file-select:hover .file-select-button{background:#34495e;color:#FFFFFF;transition:all .2s ease-in-out;-moz-transition:all .2s ease-in-out;-webkit-transition:all .2s ease-in-out;-o-transition:all .2s ease-in-out;}
.file-upload.active .file-select{border-color:#3fa46a;transition:all .2s ease-in-out;-moz-transition:all .2s ease-in-out;-webkit-transition:all .2s ease-in-out;-o-transition:all .2s ease-in-out;}
.file-upload.active .file-select .file-select-button{background:#3fa46a;color:#FFFFFF;transition:all .2s ease-in-out;-moz-transition:all .2s ease-in-out;-webkit-transition:all .2s ease-in-out;-o-transition:all .2s ease-in-out;}
.file-upload .file-select input[type=file]{z-index:100;cursor:pointer;position:absolute;height:100%;width:100%;top:0;left:0;opacity:0;filter:alpha(opacity=0);}
.file-upload .file-select.file-select-disabled{opacity:0.65;}
.file-upload .file-select.file-select-disabled:hover{cursor:default;display:block;border: 2px solid #dce4ec;color: #34495e;cursor:pointer;height:40px;line-height:40px;margin-top:5px;text-align:left;background:#FFFFFF;overflow:hidden;position:relative;}
.file-upload .file-select.file-select-disabled:hover .file-select-button{background:#dce4ec;color:#666666;padding:0 10px;display:inline-block;height:40px;line-height:40px;}
.file-upload .file-select.file-select-disabled:hover .file-select-name{line-height:40px;display:inline-block;padding:0 10px;}
.button {
  position: relative;
  padding: 8px 16px;
  background: #3FA46A;
  border: none;
  outline: none;
  border-radius: 2px;
  cursor: pointer;
}

.button:active {
  background: #007a63;
}

.button__text {
  font: bold 20px "Quicksand", san-serif;
  color: #ffffff;
  transition: all 0.2s;
}

.button--loading .button__text {
  visibility: hidden;
  opacity: 0;
}

.button--loading::after {
  content: "";
  position: absolute;
  width: 16px;
  height: 16px;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  margin: auto;
  border: 4px solid transparent;
  border-top-color: #ffffff;
  border-radius: 50%;
  animation: button-loading-spinner 1s ease infinite;
}

@keyframes button-loading-spinner {
  from {
    transform: rotate(0turn);
  }

  to {
    transform: rotate(1turn);
  }
}