Need to fix error not found in module - Angular

I'm practicing angular, but received this error while compiling my code:

Module not found: Error: Can't resolve './app.component.css' in 'D:\hello-world-app\src\app'
i ｢wdm｣: Failed to compile.

My app.component.html

<h1>Angular</h1>
<courses></courses>

My courses.component.ts

// tslint:disable-next-line: import-spacing
import{Component} from '@angular/core';


@Component({
  selector: 'courses', //<courses>
  template: '<h2>Courses</h2>'
})
export class CoursesComponent {

}

My app.component.ts

import { Component } from '@angular/core';

@Component({
  selector: 'app-root',
  templateUrl: './app.component.html',
  styleUrls: ['./app.component.css']
})
export class AppComponent {
  title = 'hello-world-app';
}

My app.module.ts

import { BrowserModule } from '@angular/platform-browser';
import { NgModule } from '@angular/core';

import { AppComponent } from './app.component';
import { CoursesComponent } from './courses.component';

@NgModule({
  declarations: [
    AppComponent,
    CoursesComponent
  ],
  imports: [
    BrowserModule
  ],
  providers: [],
  bootstrap: [AppComponent]
})
export class AppModule { }