body, html {
    height: 100%;
    margin: 0;
    font-family: Arial, sans-serif;
}

#overlay {
    position: fixed; /* Stay in place */
    display: none; /* Hidden by default */
    width: 100%; /* Full width */
    height: 100%; /* Full height */
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(0,0,0,0.5); /* Black w/ opacity */
    z-index: 2; /* Sit on top */
    cursor: pointer;
}

#modal {
    background-color: #fefefe;
    margin: 15% auto; /* 15% from the top and centered */
    padding: 20px;
    border: 1px solid #888;
    width: 80%; /* Could be more or less, depending on screen size */
    max-width: 500px;
    z-index: 3;
    cursor: default;
    border-radius: 10px;
    text-align: center;
}

input[type=text] {
    width: 90%;
    padding: 12px 20px;
    margin: 8px 0;
    display: inline-block;
    border: 1px solid #ccc;
    box-sizing: border-box;
    border-radius: 5px;
}

button {
    background-color: #4CAF50;
    color: white;
    padding: 14px 20px;
    margin: 8px 0;
    border: none;
    cursor: pointer;
    width: 50%;
    border-radius: 5px;
}

button:hover {
    opacity: 0.8;
}

h2 {
    color: #333;
}

p {
    margin-bottom: 12px;
}