Module:Hatnote/styles.css

.hatnote-container {
    display: flex;
    align-items: center;
    padding: 1rem;
    margin-top: 1rem;
    margin-bottom: 2rem;
    background: red;
    border-radius: 2rem;
    color: grey;
    font-size: small;
    line-height: 1;
}

.hatnote-icon img {
    display: block;
    width: 1rem;
    height: auto;
    margin-right: 1rem;
    opacity: 0.5;
    filter: grayscale(70%);
}