.green-box {
    border: 3px solid #5f8328;
    background: #c0e9a1;
    padding: 1em 2em;
    margin: 2em 0;
}
.green-box h1,
.green-box h2,
.green-box h3,
.green-box h4,
.green-box h5,
.green-box h6 {
    color: var(--dark-blue) !important;
}