Started with about page and my cv

src/app/layout/app/app.component.html

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+<app-topbar />
+
+<main class="container app-surface">
+  <router-outlet />
+</main>
+
+<footer class="foot">
+  <small>© {{ currentYear }} Andreas Dahm - {{ `APP.COPYRIGHT` | translate }}</small>
+</footer>

src/app/layout/app/app.component.scss

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+.container { max-width: 1100px; margin: 0 auto; padding: 1rem; }
+.app-surface {
+  background: var(--app-bg);
+  color: var(--app-fg);
+  transition: background-color 220ms ease, color 220ms ease;
+}
+.foot {
+  border-top: 1px solid rgba(0,0,0,.08);
+  padding: 1rem; text-align: center; opacity: .8;
+}

src/app/layout/app/app.component.ts

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+import { Component } from '@angular/core';
+import { RouterOutlet } from '@angular/router';
+import {TopbarComponent} from '../topbar/topbar.component';
+import {TranslatePipe} from '@ngx-translate/core';
+
+
+@Component({
+  selector: 'app-root',
+  standalone: true,
+  imports: [RouterOutlet, TopbarComponent, TranslatePipe],
+  templateUrl: './app.component.html',
+  styleUrl: './app.component.scss'
+})
+export class AppComponent {
+  currentYear = new Date().getFullYear();
+}

src/app/layout/topbar/topbar.component.html

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+<mat-toolbar class="topbar" color="primary" (keydown)="onKeydown($event)">
+  <a class="brand" routerLink="/">
+    <img class="logo-dot"
+         src="{{AssetsConstants.LOGO}}"
+         alt="" aria-hidden="true"
+         draggable="false"
+         oncontextmenu="return false;"
+    >
+    <span class="brand-text">{{ 'APP.TITLE' | translate }}</span>
+  </a>
+
+  <nav class="nav">
+    <a routerLink="/about" mat-button>{{ 'TOPBAR.ABOUT' | translate }}</a>
+    <a routerLink="/projects" mat-button>{{ 'TOPBAR.PROJECTS' | translate }}</a>
+    <a routerLink="/hobbys" mat-button>{{ 'TOPBAR.HOBBY' | translate }}</a>
+    <a routerLink="/contact" mat-button>{{ 'TOPBAR.CONTACT' | translate }}</a>
+  </nav>
+
+  <span class="spacer"></span>
+
+  <!-- Settings: Sprache + Theme -->
+  <button mat-icon-button [matMenuTriggerFor]="settingsMenu" aria-label="Open settings" matTooltip="{{ 'TOPBAR.SETTINGS' | translate }}">
+    <mat-icon>tune</mat-icon>
+  </button>
+
+  <mat-menu #settingsMenu="matMenu" xPosition="before">
+    <div class="menu-section">
+      <div class="menu-title">{{ 'TOPBAR.LANGUAGE' | translate }}</div>
+      <button mat-menu-item (click)="setLang('de')">
+        <img class="flag-icon" src="{{AssetsConstants.FLAG_DE}}" alt="" aria-hidden="true">
+        <span>{{ 'LANG.DE' | translate }}</span>
+        @if (lang.lang() === 'de')
+        {
+          <mat-icon >check</mat-icon>
+        }
+      </button>
+      <button mat-menu-item (click)="setLang('en')">
+        <img class="flag-icon" src="{{AssetsConstants.FLAG_EN}}" alt="" aria-hidden="true">
+        <span>{{ 'LANG.EN' | translate }}</span>
+        @if (lang.lang() === 'en')
+        {
+          <mat-icon>check</mat-icon>
+        }
+      </button>
+    </div>
+    <mat-divider></mat-divider>
+    <div class="menu-section">
+      <div class="menu-title">{{ 'TOPBAR.APPEARANCE' | translate }}</div>
+      <button mat-menu-item (click)="theme.toggle()">
+        <mat-icon>{{ themeIcon() }}</mat-icon>
+        <span>
+          {{ theme.theme() === 'dark' ? ('THEME.LIGHT' | translate) : ('THEME.DARK' | translate) }}
+        </span>
+        <span class="kbd">Ctrl/⌘ + J</span>
+      </button>
+    </div>
+  </mat-menu>
+</mat-toolbar>

src/app/layout/topbar/topbar.component.scss

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+.topbar {
+  position: sticky; top: 0; z-index: 100;
+  backdrop-filter: saturate(1.1) blur(8px);
+  background:
+    color-mix(in oklab, var(--app-bg) 80%, transparent);
+  border-bottom: 1px solid rgba(0,0,0,.08);
+
+  .brand {
+    display:flex; align-items:center; gap:.6rem;
+    color: inherit; text-decoration: none;
+    .logo-dot {
+      width: 48px; height: 48px; border-radius: 50%;
+    }
+    .brand-text { font-weight: 600; letter-spacing:.2px; }
+  }
+
+  .nav { display:flex; gap:.25rem; margin-left:.5rem; }
+
+  .spacer { flex: 1; }
+
+  .flag-icon { width: 18px; height: 18px; border-radius: 2px; margin-right:.5rem; }
+
+  .menu-section { padding:.25rem .5rem .5rem; }
+  .menu-title { font-size:.75rem; opacity:.75; padding:.25rem .75rem .5rem; }
+
+  .kbd {
+    margin-left:auto; font-size:.7rem; opacity:.65; border:1px solid currentColor;
+    border-radius:4px; padding:0 .35rem;
+  }
+}
+
+::ng-deep .mat-mdc-menu-item .mdc-list-item__primary-text {
+  display: flex;
+  align-items: center;
+  gap: .5rem;
+}
+
+::ng-deep .mat-mdc-menu-item .kbd {
+  margin-left: auto;
+  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, "Liberation Mono", monospace;
+  font-size: 11px;
+  line-height: 1.6;
+  padding: 0 .35rem;
+  border: 0px solid currentColor;
+  border-radius: 4px;
+  opacity: .65;
+}
+
+::ng-deep .mat-mdc-menu-item .mat-icon {
+  width: 20px; height: 20px; font-size: 20px;
+}
+
+::ng-deep .mat-mdc-menu-item .flag-icon {
+  width: 20px !important;
+  height: 14px !important;
+  object-fit: cover;
+  border-radius: 2px;
+  margin-right: .5rem;
+  vertical-align: middle;
+}
+
+::ng-deep .mat-mdc-menu-panel {
+  border-radius: 10px !important;
+  border: 1px solid rgba(0,0,0,.14);
+}
+.dark ::ng-deep .mat-mdc-menu-panel {
+  border-color: rgba(255,255,255,.06);
+}
+
+/* Responsive: Collapse navigation to icon if width is smaller than 760px */
+@media (max-width: 760px) {
+  .topbar .nav { display:none; }
+}

src/app/layout/topbar/topbar.component.ts

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+import { Component, computed, inject } from '@angular/core';
+import { RouterLink } from '@angular/router';
+import { MatToolbarModule } from '@angular/material/toolbar';
+import { MatIconModule } from '@angular/material/icon';
+import { MatButtonModule } from '@angular/material/button';
+import { MatMenuModule } from '@angular/material/menu';
+import { MatTooltipModule } from '@angular/material/tooltip';
+import { TranslateModule } from '@ngx-translate/core';
+import { ThemeService } from '../../service/theme.service';
+import { LanguageService } from '../../service/language.service';
+import { MatDivider } from '@angular/material/divider';
+import {AssetsConstants} from '../../constants/AssetsConstants';
+
+@Component({
+  selector: 'app-topbar',
+  standalone: true,
+  imports: [
+    RouterLink,
+    MatToolbarModule, MatIconModule, MatButtonModule, MatMenuModule, MatTooltipModule,
+    TranslateModule, MatDivider
+  ],
+  templateUrl: './topbar.component.html',
+  styleUrl: './topbar.component.scss'
+})
+export class TopbarComponent {
+  readonly theme = inject(ThemeService);
+  readonly lang = inject(LanguageService);
+
+  readonly themeIcon = computed(() =>
+    this.theme.theme() === 'dark' ? 'light_mode' : 'dark_mode'
+  );
+
+  onKeydown(e: KeyboardEvent) {
+    const metaOrCtrl = e.metaKey || e.ctrlKey;
+    if (metaOrCtrl && (e.key.toLowerCase() === 'j')) {
+      e.preventDefault();
+      this.theme.toggle();
+    }
+  }
+
+  setLang(code: 'de' | 'en') { this.lang.use(code); }
+
+  protected readonly AssetsConstants = AssetsConstants;
+}