.main {
    margin: 20% auto;
    background-color: aqua;
    width: 60%;
    padding: 5%;
    border-radius: 5vmin;
}

.group-link {
    background-color: #00BDBD;
    margin: 3% auto;
    padding: 5%;
    border-radius: 3vmin;
    border-color: #005858;
    text-align: left;
}

.group-link h4 {
    margin-block-end: 0.5em;
    margin-block-start: 0.5em;
}


@media all and (max-width: 500px) {
    .main {
        margin: 2%;
        width: 85%;
    }
}