.modal {
    display: none;

    position: fixed;
    z-index: 9999;

    left: 0;
    top: 0;

    width: 100%;
    height: 100%;

    background: rgba(0,0,0,0.5);

}

.modal-content {
    background: white;

    width: 80%;
    max-width: 900px;

    margin: 50px auto;
    padding: 20px;

    border:2px solid #020202;
}

.modal-close {
    float: right;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 30px;
    width: 32px;
    height: 32px;
    cursor: pointer;
    border: 2px solid #020202;
}

.modal-close:hover {
    background: #fe1d1d;
    color: white;
}

.simulation-block {
    margin-bottom: 30px;
    padding: 20px;
    background: #f7f7f7;
    border-left: 4px solid #333;
}

.simulation-block h2 {
    margin-top: 0;
}

.simulation-block ul {
    margin: 10px 0 0 20px;
}