.flex {
  display: flex;
  align-items: center;
  justify-content: center;
}

.app-btn {
  width: 50%;
  max-width: 190px;
  color: #fff;
  margin: 20px 10px;
  text-align: left;
  border-radius: 5px;
  text-decoration: none;
  font-family: "Lucida Grande", sans-serif;
  font-size: 10px;
  text-transform: uppercase;
}
.app-btn.blu {
  background-color: #000;
}
.app-btn.blu:hover {
  background-color: #071a52;
  color: #ffffff;
  border-radius: 5px;
  -webkit-transition: all 0.3s;
  transition: all 0.3s;
  outline: 2px solid #000;
  transition: background-color 0.25s linear;
}
.app-btn i {
  width: 20%;
  text-align: center;
  font-size: 28px;
  margin-right: 7px;
}
.app-btn .big-txt {
  font-size: 17px;
  text-transform: capitalize;
}