Angular 2: Styling router-outlet to have width < 100%

Question

I'm building an Angular 2 app which would have a side nav bar for screens wider than 500, and a bottom nav bar for screens less wide than 500. For now I was trying to assign a 20% width to the side bar, 80% to app content.

The problem that I have is that the router-outlet content (i.e. the actual app) takes up the full width of the page instead of just 80%. It seems to be ignoring any styling I try to give it. Are we not supposed to style router-outlet directly? Or perhaps there is a better way that I'm overlooking?

app.component.ts

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

@Component({
  selector: 'my-app',
  template: `
    <div class="container-fluid">
      <nav *ngIf="this.window.innerWidth > 500"></nav>
      <router-outlet style="width:80%;float:right;"></router-outlet>
      <nav *ngIf="this.window.innerWidth < 500"></nav>
  `,
  styleUrls: ['app/app.component.css']
})
export class AppComponent {
  window = [];

  ngOnInit(): void {
    this.window.innerWidth = window.innerWidth;
  }

  @HostListener('window:resize', ['$event'])
  onResize(event) {
    this.window.innerWidth = event.target.innerWidth;
    console.log(this.window.innerWidth);
  }
}

Answer 1

By using :host we can modify the style while loading the component.

:host(selector) { width:70% }

Following is the component:

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

@Component({
  selector: 'test-selector',
  templateUrl: './test.component.html',
  styleUrls: ['./test.component.css']
})
export class TestComponent{
}

//test.component.css content
:host(test-selector) { width:70% } will reduce the width to 70%

Answer 2

Use host:{'style':'width:70%'} within @Component({}) in the component file to set the width of child