.addons-modal {
    display: none;
    position: fixed;
    top: 0; left: 0;
    width: 100%; height: 100%;
    background: rgba(0,0,0,0.5);
    z-index: 9999;
}

.addons-list {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 15px;
    margin-top: 20px;
}
.addon-item {
    border: 1px solid #ddd;
    padding: 10px;
    text-align: center;
}
.addon-item img {
    max-width: 100%;
    height: auto;
}
.addons-summary {
    margin-top: 20px;
}
.addons-continue {
    margin-top: 10px;
    padding: 10px 20px;
    background: red;
    color: #fff;
    border: none;
    cursor: pointer;
}
.addons-close {
    float: right;
    font-size: 20px;
    cursor: pointer;
}