Form builder:
tpl:
templates/YOUR_TPL_SET/system/box_default/box_form.tpl template
line 8
Code:
<div class="box_title_holder"><div class="box_title"><vte:value select="{form.title}" /></div></div>
you can perhaps add different class (these are vivvo box defaults) i.e.
form_title_holder instead of
box_title_holder, and
form_title instead of
box_title.
css:
themes/YOUR_THEME/css/plugin_form_builder.css
style for textarea:
line 15
Code:
textarea.form_builder_textarea {width: 90%;}
change it to some pixel width, 250px for example.
As for the title styles, you can place them here and style it to suite your needs
Code:
.form_title_holder {}
.form_title {}
As for the attachments header, edit
templates/YOUR_TPL_SET/box/plugin_multiple_attachments.tpl template, and remove
Code:
<h3 class="box_title title_gray"><vte:value select="{LNG_ATTACHMENTS}" /></h3>