HTML TEMPLATE
<template>
    <lightning-card title="Custom Search Functionality in LWC" icon-name="standard:account">
        <div if:true={errorMsg} style="margin-left: 3%;">
            <p style="color: red;">{errorMsg}</p>
        </div>
        <lightning-layout multiple-rows="true" vertical-align="end">
            <lightning-layout-item size="12" small-device-size="10" medium-device-size="8" large-device-size="6" padding="around-small">
                    <div class="slds-form-element">
                            <div class="slds-form-element__control">
                                    <lightning-input type="text" 
                                                     label="Enter Customer Name" name ="cusName"
                                                     onchange={handleCustomerName} ></lightning-input>
                            </div>
                        </div> 
            </lightning-layout-item>
            <lightning-layout-item size="12" small-device-size="2" medium-device-size="2" large-device-size="2" padding="around-small">
                    <lightning-button label="Search" 
                                      variant="brand" 
                                      onclick={handleSearch}></lightning-button>
                </lightning-layout-item>
            </lightning-layout><br/>
            <template if:true={show}>
                <div class="acc-container">
                    {recordId}
                    <lightning-record-view-form record-id={recordId} object-api-name="Client__c">
                        <div class="slds-grid">
                            <div class="slds-col slds-size_1-of-2">
                                <lightning-output-field field-name="Name"></lightning-output-field>
                                <lightning-output-field field-name="Date_of_Birth__c"></lightning-output-field>
                            </div>
                            <div class="slds-col slds-size_1-of-2">
                                <lightning-output-field field-name="Photo__c"></lightning-output-field>
                                <lightning-output-field field-name="Booking_Date__c"></lightning-output-field>
                            </div>
                        </div>
                    </lightning-record-view-form>
                </div>
            </template>
           
      
    </lightning-card>
</template>

js

import { LightningElement, track } from 'lwc';
import getDetail from '@salesforce/apex/PriceFetch.getDetail';
export default class ClientDefinition extends LightningElement {
    cusName;
    @track show = false;
    @track recordId;
    handleCustomerName(event) {
        this.cusName =  event.target.value;
    }
    handleSearch() {
       /* if(this.cusName.equals('')) {
            this.errorMsg = 'Please enter customer name to search.';
          
            return;
        }*/
        alert(this.cusName);
     
        getDetail({ clientName: this.cusName})
          
        
           .then(result => {
            this.show = true;
            alert(result);
            this.recordId = result;
           })
        
           .catch(error => {
                this.error = error;
                alert("FAILURE" + error);
                 //this.error = error;
           });
            
    }
}

Apex controllr class

public with sharing class PriceFetch {
  
    @AuraEnabled
    public static String getDetail(String clientName) {
       
        String search = '%' + clientName + '%';
       
       List<Client__c> clients = new List<Client__c>();
         clients = [
            SELECT Id, Name, Unit__c, Total_cost__c, Remarks__c, Project__c,Profession__r.Name,Photo__c,PAN__c,Father_Spouse__c,Email_id__c,
            Date_of_Birth__c,Contact_Number__c,Communication_address__c,Booking_Date__c,Booking_Amount__c,Agreement_Date__c,Aadhar_Number__c
            FROM Client__c
            WHERE Name LIKE :search
            LIMIT 1];
            if(clients.size() == 0) {
                 throw new AuraHandledException('exceptionText');
            }
            
           return clients.get(0).Id;
        
    }


 
}

Is there any mistake in my code?
Im not getting the recordId.