Remove bottom border from Lightning Card

I have a Lightning Card in a Tabset and I cannot remove the bottom border. Below is the code (I have removed the other tabs for simplicity).
I needed to use a CSS to display the Border in the Card – LWC lightning-card border not shown with slds-card_boundary

HTML

<lightning-tabset>
    <!--OVERVIEW-->
    <lightning-tab label="Overview">   
    <lightning-record-edit-form record-id={recordId} object-api-name="Match__c" onsuccess={handleSuccess}>         
        <lightning-card class="my-card slds-card_boundary" title="Search Details">
            <div class="slds-grid slds-gutters  slds-p-horizontal_small">
                <div class="slds-col slds-size_1-of-2">
                    <lightning-input-field field-name="EmploymentStatus__c" onchange={handleChange}></lightning-input-field>                                      
                </div>
                <div class="slds-col slds-size_1-of-2">
                    <lightning-input-field field-name="JobSearchStatus__c" onchange={handleChange}></lightning-input-field>                                        
                </div>
            </div>  
            <div class="slds-grid slds-gutters slds-p-horizontal_small">
                <div class="slds-col slds-size_1-of-1">
                    <lightning-input-field field-name="InterestRationale__c" onchange={handleChange}></lightning-input-field>
                    <lightning-input-field field-name="ConcurrentProcesses__c" onchange={handleChange}></lightning-input-field>
                </div>
            </div>
        </lightning-card>                 
    </lightning-record-edit-form>   
    </lightning-tab>
</lightning-tabset>      
</template> 

CSS

.my-card {
    display: block;
    margin: 5px 5px 5px 5px;
}
:host {
    --sds-c-textarea-sizing-min-height: 200px;
}