.popup {
    display: none; /* Hidden by default */
    position: fixed; /* Stay in place */
    z-index: 1000; /* Sit on top */
    left: 0;
    top: 0;
    width: 100%; /* Full width */
    height: 100%; /* Full height */
    overflow: auto; /* Enable scroll if needed */
    background-color: rgba(0,0,0,0.5); /* Black w/ opacity */
}

.popup-content {
    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;
    border-radius: 10px;
    text-align: center;
    position: relative;
}

.close-button {
    color: #aaa;
    position: absolute;
    top: 10px;
    right: 20px;
    font-size: 28px;
    font-weight: bold;
}

.close-button:hover,
.close-button:focus {
    color: black;
    text-decoration: none;
    cursor: pointer;
}

#popup-confirm-button {
    background-color: #007BFF;
    color: white;
    padding: 12px 24px;
    text-decoration: none;
    font-size: 1.1rem;
    border-radius: 8px;
    transition: all 0.3s;
    border: none;
    text-transform: uppercase;
    font-weight: bold;
    cursor: pointer;
    margin-top: 15px;
}

#popup-confirm-button:hover {
    background-color: #0056b3;
    transform: translateY(-2px);
    box-shadow: 0 2px 4px rgba(0,0,0,0.2);
}