CSS not loading when I call a div to print

I have a div that I would like to print, but when I call it, the CSS doesn’t apply. I got the JS from here. It’s supposed to print just the table, which it does, but It doesn’t apply the styles for the table, and it ends up unformatted.

Expected result

Actual result

This is my code:

HTML:

            <div id="printableArea">
                <h3 class="table-heading" contenteditable="true">My PC Setup</h3>
                <table spellcheck="false">
                    <tr>
                        <!--https://pcbuilder.net/rigs/aK6rMH/-->
                        <th>Part</th>
                        <th>Name</th>
                        <th>Price</th>
                        <th>Notes</th>
                    </tr>
                    <tr>
                        <td>Processor</td>
                        <td contenteditable="true" onclick="document.execCommand('selectAll',false,null)">AMD Ryzen 9
                            7950X
                        </td>
                        <td contenteditable="true" onclick="document.execCommand('selectAll',false,null)" class="price">
                            747</td>
                        <td contenteditable="true" onclick="document.execCommand('selectAll',false,null)">
                            32-Thread<br>16-Core<br>4.5GHz</td>
                    </tr>
                    <tr>
                        <td>Motherboard</td>
                        <td contenteditable="true" onclick="document.execCommand('selectAll',false,null)">GIGABYTE X670E
                            AORme
                            Master</td>
                        <td contenteditable="true" onclick="document.execCommand('selectAll',false,null)" class="price">
                            542.84</td>
                        <td contenteditable="true" onclick="document.execCommand('selectAll',false,null)">Socket:
                            AM5<br>RAM
                            Slots: 4<br>Chipset: AMD X670E</td>
                    </tr>
                    <tr>
                        <td>CPU Cooler</td>
                        <td contenteditable="true" onclick="document.execCommand('selectAll',false,null)">Cooler Master
                            Hyper
                            212 EVO V2</td>
                        <td contenteditable="true" onclick="document.execCommand('selectAll',false,null)" class="price">
                            90</td>
                        <td contenteditable="true" onclick="document.execCommand('selectAll',false,null)">Side Panel:
                            Tempered
                            Glass, Steel<br>Cabinet Type: ATX Full Tower</td>
                    </tr>
                    <tr>
                    <tr>
                        <td>Case</td>
                        <td contenteditable="true" onclick="document.execCommand('selectAll',false,null)">NZXT H510 -
                            CA-H510B-B1</td>
                        <td contenteditable="true" onclick="document.execCommand('selectAll',false,null)" class="price">
                            1,584.90</td>
                        <td contenteditable="true" onclick="document.execCommand('selectAll',false,null)">Memory:
                            24GB<br>Chipset: GeForce RTX 3090 Ti<br>Interface: PCIe 4.0 x16</td>
                    </tr>
                    <tr>
                        <td>Graphics card</td>
                        <td contenteditable="true" onclick="document.execCommand('selectAll',false,null)">Nvidia RTX
                            3090 TI
                            Founders Edition</td>
                        <td contenteditable="true" onclick="document.execCommand('selectAll',false,null)" class="price">
                            51.44</td>
                        <td contenteditable="true" onclick="document.execCommand('selectAll',false,null)">Fan Speed:
                            650RPM-1800RPM<br>Noise Level: 8-27dBA</td>
                    </tr>
                    <tr>
                        <td>RAM</td>
                        <td contenteditable="true" onclick="document.execCommand('selectAll',false,null)">G.Skill
                            Trident Z5
                            RGB
                            Series 32GB 2 x 16GB (x2)</td>
                        <td contenteditable="true" onclick="document.execCommand('selectAll',false,null)" class="price">
                            564.42</td>
                        <td contenteditable="true" onclick="document.execCommand('selectAll',false,null)">RAM Size:
                            64GB<br>RAM
                            Type: DDR5</td>
                    </tr>
                    <tr>
                        <td>Storage (SSD)</td>
                        <td contenteditable="true" onclick="document.execCommand('selectAll',false,null)">Samsung EVO
                            970
                            1TB
                        </td>
                        <td contenteditable="true" onclick="document.execCommand('selectAll',false,null)" class="price">
                            167.99</td>
                        <td contenteditable="true" onclick="document.execCommand('selectAll',false,null)">Capacity: 1
                            TB<br>Type: SSD<br>Cache Memory: 1024 MB</td>
                    </tr>
                    <tr>
                        <td>Storage (HDD)</td>
                        <td contenteditable="true" onclick="document.execCommand('selectAll',false,null)">Seagate
                            BarraCuda
                            2TB
                        </td>
                        <td contenteditable="true" onclick="document.execCommand('selectAll',false,null)" class="price">
                            53.49</td>
                        <td contenteditable="true" onclick="document.execCommand('selectAll',false,null)">Capacity: 2
                            TB<br>Type: HDD<br>RPM: 7200 RPM<br>Interface: SATA 6 Gb/s<br>Cache Memory: 256 MB</td>
                    </tr>
                    <tr>
                        <td>Case Cooler</td>
                        <td contenteditable="true" onclick="document.execCommand('selectAll',false,null)">ARCTIC P12
                        </td>
                        <td contenteditable="true" onclick="document.execCommand('selectAll',false,null)" class="price">
                            5.73</td>
                        <td contenteditable="true" onclick="document.execCommand('selectAll',false,null)">Fan RPM: 1800
                            RPM<br>Airflow: 56.3 CFM<br>Noise Level: N/A</td>
                    </tr>
                    <tr>
                        <td>Power Supply</td>
                        <td contenteditable="true" onclick="document.execCommand('selectAll',false,null)">Thermaltake
                            Smart
                            430W
                        </td>
                        <td contenteditable="true" onclick="document.execCommand('selectAll',false,null)" class="price">
                            98.95</td>
                        <td contenteditable="true" onclick="document.execCommand('selectAll',false,null)">Power:
                            430W<br>Efficiency: 80+</td>
                    </tr>
                    <tr>
                        <td>Monitor</td>
                        <td contenteditable="true" onclick="document.execCommand('selectAll',false,null)">Acer SB220Q Bi
                            21.5
                        </td>
                        <td contenteditable="true" onclick="document.execCommand('selectAll',false,null)" class="price">
                            170</td>
                        <td contenteditable="true" onclick="document.execCommand('selectAll',false,null)">Screen Size:
                            21.5"<br>Response Time: 4ms<br>Resolution: 1920 x 1080<br>Refresh Rate: 75 Hz</td>
                    </tr>
                    <tr>
                        <td class="total1"><b>Total</b></td>
                        <td class="total1"></td>
                        <td class="total1"></td>
                        <td contenteditable="true" onclick="document.execCommand('selectAll',false,null)" class="price">
                            <b>4,077</b>
                        </td>
                    </tr>
                </table>
            </div>
            <br>
            <input type="button" onclick="printDiv('printableArea')" value="Print your setup" />

JavaScript:

function printDiv(divName) {
var printContents = document.getElementById(divName).innerHTML;
var originalContents = document.body.innerHTML;

document.body.innerHTML = printContents;

window.print();

document.body.innerHTML = originalContents;
}

CSS:

.table-container {
display: grid;
grid-template-columns: auto;
justify-content: center;
}

table {
font-family: arial, sans-serif;
border-collapse: collapse;
width: 100%;
background-color: white;
color: black;
border: 2px solid black;
}

td,
th {
border: 1px solid black;
padding: 10px 20px;
}

th {
font-size: 20px;
}

td {
font-size: 15px;
}

tr:nth-child(even) {
background-color: #dddddd;
}

.total1 {
border: none;
}

.pc-border-title {
text-align: center;
}

.intro-heading {
font-size: 25px;
text-align: center;
color: #ffffff;
}

.pcbuilder-link {
color: #cecece;
}

.pcbuilder-link:hover {
color: #adadad;
}

.table-heading {
font-size: 50px;
text-align: center;
color: #000000;
margin-bottom: 10px;
margin-top: 0px;
border: 2px solid #000000;
}

#printableArea {
padding: 10px;
background-color: #ffffff;
border-radius: 10px;
}

.table-container {
display: grid;
grid-template-columns: auto;
justify-content: center;
}

table {
font-family: arial, sans-serif;
border-collapse: collapse;
width: 100%;
background-color: white;
color: black;
border: 2px solid black;
}

td,
th {
border: 1px solid black;
padding: 10px 20px;
}

th {
font-size: 20px;
}

td {
font-size: 15px;
}

tr:nth-child(even) {
background-color: #dddddd;
}

.total1 {
border: none;
}

.pc-border-title {
text-align: center;
}

.intro-heading {
font-size: 25px;
text-align: center;
color: #ffffff;
}

.pcbuilder-link {
color: #cecece;
}

.pcbuilder-link:hover {
color: #adadad;
}

.table-heading {
font-size: 50px;
text-align: center;
color: #000000;
margin-bottom: 10px;
margin-top: 0px;
border: 2px solid #000000;
}

#printableArea {
padding: 10px;
background-color: #ffffff;
border-radius: 10px;
}

How can I fix this? Thanks