.compose-form__publish-button-wrapper button {
    visibility: hidden;
}

a.hashtag[href="/tags/ElonMusk"]::after {
content: "\1F4A9";
}
a.hashtag[href="/tags/ElongatedMuskrat"]::after {
content: "\1F4A9";
}

.compose-form__publish-button-wrapper button:after {
    visibility: visible;
    content: 'Noot!';
    display: block;
    width: 100%;
    padding: 8px;
    border-radius: 3px;
    background-color: #595aff;
}
.compose-form__publish-button-wrapper button:hover:after {
    background-color: #6362fd;
}