.container_logo {
  position: relative;
  width: 100%;
  max-width: 400px;
}

.container_logo img {
  width: 60%;
  height: auto;
}

.container_logo .btn {
  position: absolute;
  top: 87%;
  left: 50%;
  transform: translate(-50%, -50%);
  -ms-transform: translate(-50%, -50%);
  background-color: green;
  color: white;
  font-size: 20px;
  padding: 3px 15px;
  border: 2px solid white!important;
  cursor: pointer;
  border-radius: 50px;
  text-align: center;
}

.container_logo .btn:hover {
  background-color: white!important;
  color: darkgreen!important;
}