Form controls have some default styling without using any special classes.
However labels and controls can be wrapped in .form-group tags for optimum spacing.
<form>
<div class="form-group">
<label for="input-email">Email address</label>
<...
Add the readonly attribute to prevent user input. A readonly field can't be edited
<input class="form-control" type="text" placeholder="Readonly input here…" readonly>
Add the disabled attribute to disable an input field. A disbled field can't be edited either...