styling an angular component – Twitter API

I’m still very new to angular. I’ve created a component named header via the cli. I have added the html for the navbar i want to use. I also have some css i want to add. I put it in the scss file but it doesnt seem to be working.
here’s my css:

html,
body,
header,
.view {
    height: 100%;
}
/* Navigation*/

.navbar {
    background-color: transparent;
}

.top-nav-collapse {
    background-color: #4285F4;
}
@media only screen and (max-width: 768px) {
    .navbar {
        background-color: #4285F4;
    }
}
/*Intro*/
.view {
    background: url("https://mdbootstrap.com/img/Photos/Horizontal/Nature/12-col/img%20(54).jpg")no-repeat center center fixed;
    -webkit-background-size: cover;
    -moz-background-size: cover;
    -o-background-size: cover;
    background-size: cover;
}

here’s my html:

<navbar SideClass="navbar navbar-toggleable-md navbar-dark introZindex fixed-top">
    <logo>
        <a class="logo navbar-brand">Navbar</a>
    </logo>
    <links>
        <ul class="navbar-nav mr-auto">
            <li class="nav-item active">
                <a class="nav-link">Home <span class="sr-only">(current)</span></a>
            </li>
            <li class="nav-item">
                <a class="nav-link">Features</a>
            </li>
            <li class="nav-item">
                <a class="nav-link">Pricing</a>
            </li>
        </ul>
        <ul class="navbar-nav nav-flex-icons">
            <li class="nav-item">
                <a class="nav-link"><i class="fa fa-facebook"></i></a>
            </li>
            <li class="nav-item">
                <a class="nav-link"><i class="fa fa-twitter"></i></a>
            </li>
            <li class="nav-item">
                <a class="nav-link"><i class="fa fa-instagram"></i></a>
            </li>
        </ul>
    </links>
</navbar>
<!-- Main -->
<div class="view hm-black-strong">
    <div class="full-bg-img flex-center">
        <div class="container">
            <div class="white-text text-center wow fadeInUp">
                <h2>This Navbar is fixed and transparent</h2>
                <br>
                <h5>It will always stay visible on the top, even when you scroll down</h5>
                <br>
                <p>Full page intro with background image will be always displayed in full screen mode, regardless of device </p>
            </div>
        </div>
    </div>
</div>
<!-- /.Main -->
<main class="text-center py-5 mt-3">
    <div class="container">
        <div class="row">
            <div class="col-md-12">
                <p align="justify">Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur. Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum.</p>
            </div>
        </div>
    </div>
</main>

here is the ts file:

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

@Component({
  selector: 'app-header',
  templateUrl: './header.component.html',
  styleUrls: ['./header.component.scss']
})
export class HeaderComponent implements OnInit {

  constructor() { }

  ngOnInit() {
  }

}

here is my app.module.ts file:

import { BrowserModule } from '@angular/platform-browser';
import { BrowserAnimationsModule } from '@angular/platform-browser/animations';
import { NgModule, NO_ERRORS_SCHEMA } from '@angular/core';
import { FormsModule } from '@angular/forms';
import { HttpModule } from '@angular/http';

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

import { MDBBootstrapModule } from './typescripts/angular-bootstrap-md/free';
import { MDBBootstrapModulePro } from './typescripts/angular-bootstrap-md/pro';
import { AgmCoreModule } from '@agm/core';
import { HeaderComponent } from './header/header.component';

@NgModule({
  declarations: [
    AppComponent,
    HeaderComponent
  ],
  imports: [
    BrowserModule,
    BrowserAnimationsModule,
    FormsModule,
    HttpModule,
    MDBBootstrapModule.forRoot(),
    MDBBootstrapModulePro.forRoot(),
    // https://developers.google.com/maps/documentation/javascript/get-api-key?hl=en#key
    // AgmCoreModule.forRoot({
    //   apiKey: 'google_maps_api_key'
    // })
  ],
  providers: [],
  bootstrap: [AppComponent],
  schemas: [NO_ERRORS_SCHEMA]
})
export class AppModule { }

Can anyone give me advice as to what I’m doing wrong here? the only thing in my app.component.html is which is the tag for the above mentioned component.