om/node_modules/buefy/src/scss/components/_message.scss

.message,
.notification {
    .media {
        padding-top: 0;
        border: 0;
    }
}

// Fix for Bulma 0.6.1
.notification > .delete {
    right: 0.5rem !important;
    top: 0.5rem !important;
}