Where would I insert the CSS code below?

where would i insert the following code below?

.form-label-left, .form-label-right, .form-label-top { display:none; }


.form-all {
font-family: "Lucida Grande", sans-serif;
}
.form-all {
width: 690px;
width: 100%;
max-width: 690px;
}
.form-label-left,
.form-label-right {
width: 150px;
}
.form-label {
white-space: normal;
}
.form-label.form-label-auto {
display: inline-block;
float: left;
text-align: left;
width: 150px;
}
.form-label-left {
display: inline-block;
white-space: normal;
float: left;
text-align: left;
}
.form-label-right {
display: inline-block;
white-space: normal;
float: left;
text-align: right;
}
.form-label-top {
white-space: normal;
display: block;
float: none;
text-align: left;
}
.form-all {
font-size: 14px;
}
.form-label {
font-weight: bold;
}
.form-checkbox-item label,
.form-radio-item label {
font-weight: normal;
}
.supernova {
background-color: #ffffff;
background-color: #f5f5f5;
}
.supernova body {
background-color: transparent;
}
/*
@width30: (unit(@formWidth, px) + 60px);
@width60: (unit(@formWidth, px)+ 120px);
@width90: (unit(@formWidth, px)+ 180px);
*/
/* | */
@media screen and (min-width: 480px) {
.supernova .form-all {
border: 1px solid #dcdcdc;
-webkit-box-shadow: 0 3px 9px rgba(0, 0, 0, 0.1);
-moz-box-shadow: 0 3px 9px rgba(0, 0, 0, 0.1);
box-shadow: 0 3px 9px rgba(0, 0, 0, 0.1);
}
}
/* | */
/* | */
@media screen and (max-width: 480px) {
.jotform-form {
padding: 10px 0;
}
}
/* | */
/* | */
@media screen and (min-width: 480px) and (max-width: 768px) {
.jotform-form {
padding: 30px 0;
}
}
/* | */
/* | */
@media screen and (min-width: 480px) and (max-width: 689px) {
.jotform-form {
padding: 30px 0;
}
}
/* | */
/* | */
@media screen and (min-width: 768px) {
.jotform-form {
padding: 60px 0;
}
}
/* | */
/* | */
@media screen and (max-width: 689px) {
.jotform-form {
padding: 0;
}
}
/* | */
.supernova .form-all,
.form-all {
background-color: #ffffff;
border: 1px solid transparent;
}
.form-header-group {
border-color: #e6e6e6;
}
.form-matrix-table tr {
border-color: #e6e6e6;
}
.form-matrix-table tr:nth-child(2n) {
background-color: #f2f2f2;
}
.form-all {
color: #555555;
}
.form-header-group .form-header {
color: #555555;
}
.form-header-group .form-subHeader {
color: #6f6f6f;
}
.form-sub-label {
color: #6f6f6f;
}
.form-label-top,
.form-label-left,
.form-label-right,
.form-html {
color: #555555;
}
.form-checkbox-item label,
.form-radio-item label {
color: #6f6f6f;
}
.form-line.form-line-active {
-webkit-transition-property: all;
-moz-transition-property: all;
-ms-transition-property: all;
-o-transition-property: all;
transition-property: all;
-webkit-transition-duration: 0.3s;
-moz-transition-duration: 0.3s;
-ms-transition-duration: 0.3s;
-o-transition-duration: 0.3s;
transition-duration: 0.3s;
-webkit-transition-timing-function: ease;
-moz-transition-timing-function: ease;
-ms-transition-timing-function: ease;
-o-transition-timing-function: ease;
transition-timing-function: ease;
background-color: #ffffe0;
}
/* ömer */
.form-radio-item,
.form-checkbox-item {
padding-bottom: 0px !important;
}
.form-radio-item:last-child,
.form-checkbox-item:last-child {
padding-bottom: 0;
}
/* ömer */
.form-single-column .form-checkbox-item,
.form-single-column .form-radio-item {
width: 100%;
}
.supernova {
height: 100%;
background-repeat: no-repeat;
background-attachment: scroll;
background-position: center top;
background-repeat: repeat;
}
.supernova {
background-image: none;
}
#stage {
background-image: none;
}
/* | */
.form-all {
background-repeat: no-repeat;
background-attachment: scroll;
background-position: center top;
background-repeat: repeat;
}
.form-header-group {
background-repeat: no-repeat;
background-attachment: scroll;
background-position: center top;
}
.form-line {
margin-top: 12px;
margin-bottom: 12px;
}
.form-line {
padding: 12px 36px;
}
.form-all .qq-upload-button,
.form-all .form-submit-button,
.form-all .form-submit-reset,
.form-all .form-submit-print {
font-size: 1em;
padding: 9px 15px;
font-family: "Lucida Grande", sans-serif;
font-size: 14px;
font-weight: normal;
}
.form-all .form-pagebreak-back,
.form-all .form-pagebreak-next {
font-size: 1em;
padding: 9px 15px;
font-family: "Lucida Grande", sans-serif;
font-size: 14px;
font-weight: normal;
}
/*
& when ( @buttonFontType = google ) {
@import (css) "@{buttonFontLink}";
}
*/
h2.form-header {
line-height: 1.618em;
font-size: 1.714em;
}
h2 ~ .form-subHeader {
line-height: 1.5em;
font-size: 1.071em;
}
.form-header-group {
text-align: left;
}
/*.form-dropdown,
.form-radio-item,
.form-checkbox-item,
.form-radio-other-input,
.form-checkbox-other-input,*/
.form-captcha input,
.form-spinner input,
.form-error-message {
padding: 4px 3px 2px 3px;
}
.form-header-group {
font-family: "Lucida Grande", sans-serif;
}
.form-section {
padding: 0px 0px 0px 0px;
}
.form-header-group {
margin: 12px 36px 12px 36px;
}
.form-header-group {
padding: 24px 0px 24px 0px;
}
.form-textbox,
.form-textarea {
padding: 4px 3px 2px 3px;
}
.form-textbox,
.form-textarea,
.form-radio-other-input,
.form-checkbox-other-input,
.form-captcha input,
.form-spinner input {
background-color: #ffffff;
}
[data-type="control_dropdown"] .form-input,
[data-type="control_dropdown"] .form-input-wide {
width: 150px;
}
.form-label {
font-family: "Lucida Grande", sans-serif;
}
li[data-type="control_image"] div {
text-align: left;
}
li[data-type="control_image"] img {
border: none;
border-width: 0px !important;
border-style: solid !important;
border-color: false !important;
}
.form-line-column {
width: auto;
}
.form-line-error {
overflow: hidden;
-webkit-transition-property: none;
-moz-transition-property: none;
-ms-transition-property: none;
-o-transition-property: none;
transition-property: none;
-webkit-transition-duration: 0.3s;
-moz-transition-duration: 0.3s;
-ms-transition-duration: 0.3s;
-o-transition-duration: 0.3s;
transition-duration: 0.3s;
-webkit-transition-timing-function: ease;
-moz-transition-timing-function: ease;
-ms-transition-timing-function: ease;
-o-transition-timing-function: ease;
transition-timing-function: ease;
background-color: #fff4f4;
}
.form-line-error .form-error-message {
background-color: #ff3200;
clear: both;
float: none;
}
.form-line-error .form-error-message .form-error-arrow {
border-bottom-color: #ff3200;
}
.form-line-error input:not(#coupon-input),
.form-line-error textarea,
.form-line-error .form-validation-error {
border: 1px solid #ff3200;
-webkit-box-shadow: 0 0 3px #ff3200;
-moz-box-shadow: 0 0 3px #ff3200;
box-shadow: 0 0 3px #ff3200;
}
.ie-8 .form-all {
margin-top: auto;
margin-top: initial;
}
.ie-8 .form-all:before {
display: none;
}
/* | */
@media screen and (max-width: 480px), screen and (max-device-width: 768px) and (orientation: portrait), screen and (max-device-width: 415px) and (orientation: landscape) {
.jotform-form {
padding: 0;
}
.form-all {
border: 0;
width: 100% !important;
max-width: initial;
}
.form-sub-label-container {
width: 100%;
margin: 0;
}
.form-input {
width: 100%;
}
.form-label {
width: 100%!important;
}
.form-line {
padding: 2% 5%;
-moz-box-sizing: border-box;
-webkit-box-sizing: border-box;
box-sizing: border-box;
}
input[type=text],
input[type=email],
input[type=tel],
textarea {
width: 100%;
-moz-box-sizing: border-box;
-webkit-box-sizing: border-box;
box-sizing: border-box;
max-width: initial !important;
}
.form-input,
.form-input-wide,
.form-textarea,
.form-textbox,
.form-dropdown {
max-width: initial !important;
}
div.form-header-group {
padding: 24px 0px !important;
margin: 0 12px 2% !important;
margin-left: 5% !important;
margin-right: 5% !important;
-moz-box-sizing: border-box;
-webkit-box-sizing: border-box;
box-sizing: border-box;
}
[data-type="control_button"] {
margin-bottom: 0 !important;
}
.form-buttons-wrapper {
margin: 0!important;
}
.form-buttons-wrapper button {
width: 100%;
}
table {
width: 100%!important;
max-width: initial !important;
}
table td + td {
padding-left: 3%;
}
.form-checkbox-item input,
.form-radio-item input {
width: auto;
}
.form-collapse-table {
margin: 0 5%;
}
}
/* | *//*__INSPECT_SEPERATOR__*/

...

The custom CSS is usually added via Form Designer. Please see the next animation.

However, the process might be different depending on your goal. If you need help with anything specific, please provide us with more information on your inquiry.