Gravity Forms Twitter Bootstrap CSS Styles Turn OFF Gravity Forms CSS.

gravity-forms_bootstrap

/* ------------------------------------
Gravity Forms
---------------------------------------*/

.gform_wrapper ul {
  padding-left: 0;
  list-style: none
}

.gform_wrapper li {
  margin-bottom: 15px
}

.gform_wrapper form {
  margin-bottom: 0
}

.gform_wrapper .gfield_required {
  padding-left: 1px;
  color: #b94a48
}

.ginput_container input, .ginput_container select, .ginput_container textarea {
  display: block;
  width: 100%;
  height: 34px;
  padding: 6px 12px;
  font-size: 14px;
  line-height: 1.428571429;
  color: #555;
  vertical-align: middle;
  background-color: #fff;
  border: 1px solid #ccc;
  border-radius: 4px;
  box-shadow: inset 0 1px 1px rgba(0,0,0,0.075);
  transition: border-color ease-in-out .15s, box-shadow ease-in-out .15s
}

.ginput_container input[type="radio"] {
  height: auto;
}

.ginput_container input:-moz-placeholder, .ginput_container select:-moz-placeholder, .ginput_container textarea:-moz-placeholder {
  color: #999
}

.ginput_container input::-moz-placeholder, .ginput_container select::-moz-placeholder, .ginput_container textarea::-moz-placeholder {
  color: #999
}

.ginput_container input:-ms-input-placeholder, .ginput_container select:-ms-input-placeholder, .ginput_container textarea:-ms-input-placeholder {
  color: #999
}

.ginput_container input::-webkit-input-placeholder, .ginput_container select::-webkit-input-placeholder, .ginput_container textarea::-webkit-input-placeholder {
  color: #999
}

.ginput_container input:focus, .ginput_container select:focus, .ginput_container textarea:focus {
  border-color: #66afe9;
  outline: 0;
  box-shadow: inset 0 1px 1px rgba(0,0,0,0.075), 0 0 8px rgba(102,175,233,0.6)
}

.ginput_container input[disabled], .ginput_container select[disabled], .ginput_container textarea[disabled], .ginput_container input[readonly], .ginput_container select[readonly], .ginput_container textarea[readonly], fieldset[disabled] .ginput_container input, fieldset[disabled] .ginput_container select, fieldset[disabled] .ginput_container textarea {
  cursor: not-allowed;
  background-color: #eee
}

textarea.ginput_container input, textarea.ginput_container select, textarea.ginput_container textarea {
  height: auto
}

.ginput_container textarea {
  height: auto
}

.gform_button {
  display: inline-block;
  padding: 6px 12px;
  margin-bottom: 0;
  font-size: 14px;
  font-weight: normal;
  line-height: 1.428571429;
  color: #fff;
  text-align: center;
  white-space: nowrap;
  vertical-align: middle;
  cursor: pointer;
  background-color: #428bca;
  border: 1px solid transparent;
  border-color: #357ebd;
  border-radius: 4px;
  user-select: none
}

.gform_button:focus {
  outline: thin dotted #333;
  outline: 5px auto -webkit-focus-ring-color;
  outline-offset: -2px
}

.gform_button:hover, .gform_button:focus {
  color: #333;
  text-decoration: none
}

.gform_button:active, .gform_button.active {
  background-image: none;
  outline: 0;
  -webkit-box-shadow: inset 0 3px 5px rgba(0,0,0,0.125);
  box-shadow: inset 0 3px 5px rgba(0,0,0,0.125)
}

.gform_button.disabled, .gform_button[disabled], fieldset[disabled] .gform_button {
  pointer-events: none;
  cursor: not-allowed;
  opacity: .65;
  filter: alpha(opacity=65);
  -webkit-box-shadow: none;
  box-shadow: none
}

.gform_button:hover, .gform_button:focus, .gform_button:active, .gform_button.active, .open .dropdown-toggle.gform_button {
  color: #fff;
  background-color: #3276b1;
  border-color: #285e8e
}

.gform_button:active, .gform_button.active, .open .dropdown-toggle.gform_button {
  background-image: none
}

.gform_button.disabled, .gform_button[disabled], fieldset[disabled] .gform_button, .gform_button.disabled:hover, .gform_button[disabled]:hover, fieldset[disabled] .gform_button:hover, .gform_button.disabled:focus, .gform_button[disabled]:focus, fieldset[disabled] .gform_button:focus, .gform_button.disabled:active, .gform_button[disabled]:active, fieldset[disabled] .gform_button:active, .gform_button.disabled.active, .gform_button[disabled].active, fieldset[disabled] .gform_button.active {
  background-color: #428bca;
  border-color: #357ebd
}

.gform_wrapper .gfield_error .gfield_label {
  color: #b94a48
}

.gform_wrapper .gfield_error input, .gform_wrapper .gfield_error select, .gform_wrapper .gfield_error textarea {
  color: #b94a48;
  background-color: #f2dede;
  border-color: #eed3d7
}

.gform_wrapper .gfield_error input:focus, .gform_wrapper .gfield_error select:focus, .gform_wrapper .gfield_error textarea:focus {
  border-color: #b94a48;
  outline: 0;
  -webkit-box-shadow: inset 0 1px 1px rgba(0,0,0,0.075), 0 0 8px rgba(185,74,72,0.6);
  box-shadow: inset 0 1px 1px rgba(0,0,0,0.075), 0 0 8px rgba(185,74,72,0.6)
}

.validation_error {
  padding: 15px;
  margin-bottom: 20px;
  color: #b94a48;
  background-color: #f2dede;
  border: 1px solid transparent;
  border-color: #eed3d7;
  border-radius: 4px
}

.validation_error h4 {
  margin-top: 0;
  color: inherit
}

.validation_error .alert-link {
  font-weight: bold
}

.validation_error>p, .validation_error>ul {
  margin-bottom: 0
}

.validation_error>p+p {
  margin-top: 5px
}

.validation_error hr {
  border-top-color: #e6c1c7
}

.validation_error .alert-link {
  color: #953b39
}

#gforms_confirmation_message {
  padding: 15px;
  margin-bottom: 20px;
  border: 1px solid transparent;
  border-radius: 4px
}

#gforms_confirmation_message h4 {
  margin-top: 0;
  color: inherit
}

#gforms_confirmation_message .alert-link {
  font-weight: bold
}

#gforms_confirmation_message>p, #gforms_confirmation_message>ul {
  margin-bottom: 0
}

#gforms_confirmation_message>p+p {
  margin-top: 5px
}

Removed some vendor prefixes (handled by Autoprefixer), added height: auto for type=radio and beautified.