body {
   display: flex;
   align-items: center;
   justify-content: center;
   height: 100vh;
      }
p {
   font-size: 2rem;
}

button {
    padding: 7px;
    border: none;
    border-radius: 4px;
    cursor: pointer;
}

button.blue {
    background-color: #3498db;
}

button.green {
    background-color: #2ecc71;
}

button.orange {
   background-color: orangered;
}