.modal {
    display: none;              /* 🔥 tämä ratkaisee ongelman */
    position: fixed;
    z-index: 999;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background: rgba(0,0,0,0.7);
}

.modal-content {
    margin: 5% auto;
    width: 90%;
    max-width: 1000px;
    background: white;
    padding: 10px;
}

.modal img {
    width: 100%;
    height: auto;
}