.popup {
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    background-color: white;
    padding: 20px;
    border: 1px solid black;
    border-radius: 5px;
    z-index: 1000;
}
   
.popup h2 {
    margin: 0;
}
   
.popup p {
    margin: 20px 0;
}
   
.popup input, .popup select, .popup textarea {
    width: 100%;
    margin-bottom: 20px;
}
   
.popup button {
    display: block;
    margin: 0 auto;
}
   
.popup button:hover {
    background-color: lightgray;
}
   
.popup button:active {
    background-color: darkgray;
}
   
.popup button:focus {
    outline: none;
}