.popup-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    display: none;
    z-index: 999;
    opacity: 0;
    transition: opacity 0.5s ease-in-out;
}
.popup {
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 90%;
    max-width: 900px;
    height: auto;
    max-height: 70vh; overflow-y: auto;
    background: #002147;
    box-shadow: 0px 4px 10px rgba(0, 0, 0, 0.3);
    padding: 20px;
    display: none;
    border-radius: 10px;
    z-index: 1000;
    opacity: 0;
    transition: opacity 0.5s ease-in-out;
    color: white;
    display: none;
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
    border: 1px solid white;
    position: fixed;
}
.popup-content {
    flex: 1;
    padding: 20px;
    text-align: left;font-size: 150%;
}
.popup img.illustration {
    width: 35%; max-width: 300px;
    max-width: 350px;
    height: auto;
    border-radius: 10px;
}
.popup-close {
    position: absolute;
    top: 10px;
    right: 10px;
    cursor: pointer;
    width: 50px;
    height: 50px;
}
.popup button {
    background-color: #FFC107;
    color: black;
    padding: 15px 30px;
    border: none;
    cursor: pointer;
    margin-top: 15px;
    border-radius: 5px;
    font-weight: bold;
    font-size: 20px;
}
.popup h2 {
    font-size: 160%;
    text-align: left;
    color: #fff;
}
.popup h2 span {
    display: block;
}
.popup h2 .highlight {
    color: #fff;
}
@media (max-width: 600px) {
    .popup {
        width: 80%;
        max-width: 400px;
        padding: 10px;
    }
    .popup-content {
        text-align: center;
        font-size: 90%;
    }
    .popup img.illustration {
        width: 70%;
        max-width: 250px;
        margin-top: 10px;
    }
    .popup h2 {
        font-size: 120%;
        text-align: center;
    }
    .popup button {
        font-size: 16px;
        padding: 10px 20px;
    }
    .popup {
        flex-direction: column;
        width: 95%;
        padding: 15px;
    }
    .popup-content {
        text-align: center;
    }
    .popup img.illustration {
        width: 80%;
        max-width: 300px;
        margin-top: 15px;
    }
    .popup h2 {
        font-size: 130%;
        text-align: center;
    }
    .popup button {
        font-size: 18px;
    }
}