.btn {
    display: block;
    width: 200px;
    padding: 10px 20px;
    background-color: #5865f2;
    color: #fff; 
    text-align: center;
    text-decoration: none;
    border: none;
    border-radius: 5px;
    font-size: 16px;
    cursor: pointer;
    margin: 0 auto;
    position: absolute;
    top: 50%;
    left: 50%; 
    transform: translate(-50%, -50%);
}


#modal{
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
  }

#changing-text {
    font-size: 24px;
    margin-top: 40px;
    text-align: center;
}