.modal {
    display: none;
    position: fixed;
    z-index: 1000;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
}

.modal-content {
    background: #fff;
    margin: 10% auto;
    padding: 20px;
    border-radius: 8px;
    width: 60%;
    position: relative;
}

.modal-close {
    position: absolute;
    top: 10px;
    right: 10px;
    border: none;
    background: transparent;
    font-size: 1.5em;
    cursor: pointer;
}

.hidden {
    display: none;
}