angular-test-repo/src/app/components/page-main/page-main.component.scss

.my-header {
    display: flex;

    .start  {
        flex-grow: 0;
        h1 {
            margin: 0;
        }
    }

    .space {
        flex: 1;
    }

    .settings {
        flex-grow: 0;
    }
}