html,
body {
    margin: 0;
    padding: 50px;
    font-family: Arial, Helvetica, sans-serif;
    text-align: center;
}

#modal {
    max-width: 600px;
    height: 200px;
    margin: 0 auto;
    padding: 20px 20px;
    background: #26262c;
    color: whitesmoke;
    position: relative;
    top: 30%;
}

p {
    font-size: 30px; 
}

.btn {
    padding: 10px 20px;
    background: midnightblue;
    color: whitesmoke; 
    font-weight: bold;
    font-size: 20px;
    cursor: pointer;
    border: none;
    border-radius: 5px;
}

#overlay {
    width: 100%;
    height: 100%;;
    display: none;
    position: absolute;
    top: 0;
    left: 0;
    bottom: 0;
    right: 0;
    background: rgba(0, 0, 0, 0.4);
}