// Place all the styles related to the Activities controller here.
// They will automatically be included in application.css.
// You can use Sass (SCSS) here: http://sass-lang.com/
.activity-overview {
  padding-bottom: 20px;
}

.activity-form {
  label {
    font-weight: bold;
  }
}

trix-editor {
  min-height: 320px !important;
}

trix-toolbar .button_groups {
  button.code {
    display: none;
  }
  button.strike {
    display: none;
  }
  button.increase {
    display: none;
  }
  button.decrease {
    display: none;
  }
}
// Place all the styles related to the Activities controller here.
// They will automatically be included in application.css.
// You can use Sass (SCSS) here: http://sass-lang.com/
.activity-overview {
  padding-bottom: 20px;
}

.activity-form {
  label {
    font-weight: bold;
  }
}

trix-editor {
  min-height: 320px !important;
}

trix-toolbar .button_groups {
  button.code {
    display: none;
  }
  button.strike {
    display: none;
  }
  button.increase {
    display: none;
  }
  button.decrease {
    display: none;
  }
}

.activity-form trix-toolbar {
  .trix-button--icon {
    width: 3.6em;
    height: 2.6em;
  }

  .trix-button {
    background: white;
  }
}

Make buttons bigger and white background
Make buttons bigger and white background
