:root {
    --navy: #000e1f;
    --navy-mid: #001830;
    --blue: #0099cc;
    --blue-light: #e8f4fb;
    --green: #059669;
    --gray-1: #f8fafc;
    --gray-2: #f1f5f9;
    --gray-3: #e2e8f0;
    --gray-4: #94a3b8;
    --gray-5: #64748b;
    --text: #0f172a;
    --text-2: #334155;
    --sidebar-w: 280px;
    --font: 'Inter', system-ui, -apple-system, sans-serif;
  }

  * { box-sizing: border-box; margin: 0; padding: 0; }

  body {
    font-family: var(--font);
    color: var(--text);
    background: var(--gray-1);
    line-height: 1.6;
  }

  /* ── SIDEBAR ── */
  .sidebar {
    position: fixed;
    top: 0; left: 0; bottom: 0;
    width: var(--sidebar-w);
    background: var(--navy);
    overflow-y: auto;
    z-index: 100;
    display: flex;
    flex-direction: column;
  }

  .sidebar-logo {
    padding: 24px 20px 20px;
    border-bottom: 1px solid rgba(255,255,255,0.08);
    flex-shrink: 0;
  }
  .sidebar-logo .logo-text {
    font-size: 22px;
    font-weight: 800;
    color: white;
    letter-spacing: -0.5px;
  }
  .sidebar-logo .logo-text span { color: var(--blue); }
  .sidebar-logo .logo-sub {
    font-size: 11px;
    color: rgba(255,255,255,0.4);
    margin-top: 2px;
    letter-spacing: 0.04em;
    text-transform: uppercase;
  }

  .sidebar-search {
    padding: 12px 16px;
    border-bottom: 1px solid rgba(255,255,255,0.08);
    flex-shrink: 0;
  }
  .sidebar-search input {
    width: 100%;
    background: rgba(255,255,255,0.07);
    border: 1px solid rgba(255,255,255,0.12);
    border-radius: 6px;
    padding: 7px 12px;
    color: white;
    font-size: 13px;
    font-family: var(--font);
    outline: none;
  }
  .sidebar-search input::placeholder { color: rgba(255,255,255,0.35); }
  .sidebar-search input:focus { border-color: var(--blue); background: rgba(255,255,255,0.1); }

  .sidebar-nav { flex: 1; padding: 8px 0 20px; }

  .nav-section {
    padding: 16px 16px 6px;
    font-size: 10px;
    font-weight: 700;
    color: rgba(255,255,255,0.35);
    text-transform: uppercase;
    letter-spacing: 0.08em;
  }

  .nav-link {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 8px 16px;
    color: rgba(255,255,255,0.65);
    text-decoration: none;
    font-size: 13.5px;
    border-left: 3px solid transparent;
    transition: all 0.12s;
  }
  .nav-link:hover { color: white; background: rgba(255,255,255,0.05); }
  .nav-link.active { color: white; background: rgba(0,153,204,0.15); border-left-color: var(--blue); }
  .nav-link .icon { width: 16px; opacity: 0.7; flex-shrink: 0; }
  .nav-link.active .icon { opacity: 1; }

  .nav-sub { padding-left: 42px; }
  .nav-sub .nav-link { font-size: 12.5px; padding: 5px 16px 5px 0; }

  /* ── MAIN ── */
  .main {
    margin-left: var(--sidebar-w);
    min-height: 100vh;
  }

  /* ── TOPBAR ── */
  .topbar {
    background: white;
    border-bottom: 1px solid var(--gray-3);
    padding: 0 48px;
    height: 56px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    position: sticky;
    top: 0;
    z-index: 50;
  }
  .breadcrumb {
    font-size: 13px;
    color: var(--gray-5);
    display: flex;
    align-items: center;
    gap: 6px;
  }
  .breadcrumb span { color: var(--text); font-weight: 500; }
  .topbar-actions { display: flex; align-items: center; gap: 12px; }
  .btn-download {
    display: flex;
    align-items: center;
    gap: 6px;
    background: var(--navy);
    color: white;
    border: none;
    padding: 7px 14px;
    border-radius: 6px;
    font-size: 13px;
    font-family: var(--font);
    cursor: pointer;
    text-decoration: none;
    font-weight: 500;
    transition: background 0.15s;
  }
  .btn-download:hover { background: var(--blue); }

  /* ── CONTENT ── */
  .content {
    max-width: 800px;
    margin: 0 auto;
    padding: 48px 48px 80px;
  }

  /* ── HERO (nur Startseite) ── */
  .hero {
    background: linear-gradient(135deg, var(--navy) 0%, #003050 100%);
    border-radius: 16px;
    padding: 40px 44px;
    margin-bottom: 40px;
    color: white;
  }
  .hero-label {
    font-size: 11px;
    font-weight: 700;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--blue);
    margin-bottom: 12px;
  }
  .hero h1 {
    font-size: 32px;
    font-weight: 800;
    letter-spacing: -0.5px;
    line-height: 1.2;
    margin-bottom: 12px;
  }
  .hero p {
    font-size: 15px;
    color: rgba(255,255,255,0.7);
    line-height: 1.7;
    max-width: 520px;
  }
  .hero-badges {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
    margin-top: 20px;
  }
  .badge {
    background: rgba(255,255,255,0.1);
    border: 1px solid rgba(255,255,255,0.15);
    color: rgba(255,255,255,0.8);
    padding: 4px 12px;
    border-radius: 99px;
    font-size: 12px;
    font-weight: 500;
  }

  /* ── CARDS GRID ── */
  .cards-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 16px;
    margin-bottom: 40px;
  }
  .card {
    background: white;
    border: 1px solid var(--gray-3);
    border-radius: 12px;
    padding: 20px;
    text-decoration: none;
    color: var(--text);
    transition: all 0.15s;
    display: block;
  }
  .card:hover { border-color: var(--blue); box-shadow: 0 4px 16px rgba(0,153,204,0.1); transform: translateY(-1px); }
  .card-icon {
    font-size: 24px;
    margin-bottom: 10px;
    display: block;
  }
  .card h3 { font-size: 14px; font-weight: 600; margin-bottom: 4px; }
  .card p { font-size: 12px; color: var(--gray-5); line-height: 1.5; }

  /* ── ARTIKEL CONTENT ── */
  .article h1 {
    font-size: 28px;
    font-weight: 800;
    letter-spacing: -0.3px;
    color: var(--navy);
    margin-bottom: 8px;
  }
  .article .meta {
    font-size: 12px;
    color: var(--gray-4);
    margin-bottom: 28px;
    padding-bottom: 20px;
    border-bottom: 1px solid var(--gray-3);
  }
  .article h2 {
    font-size: 18px;
    font-weight: 700;
    color: var(--navy);
    margin: 32px 0 12px;
  }
  .article h3 {
    font-size: 15px;
    font-weight: 600;
    color: var(--text);
    margin: 24px 0 8px;
  }
  .article p {
    font-size: 14.5px;
    color: var(--text-2);
    line-height: 1.75;
    margin-bottom: 14px;
  }
  .article ul, .article ol {
    padding-left: 20px;
    margin-bottom: 14px;
  }
  .article li {
    font-size: 14.5px;
    color: var(--text-2);
    line-height: 1.75;
    margin-bottom: 4px;
  }

  /* ── CALLOUTS ── */
  .callout {
    border-radius: 8px;
    padding: 14px 18px;
    margin: 20px 0;
    font-size: 13.5px;
    line-height: 1.6;
    display: flex;
    gap: 12px;
    align-items: flex-start;
  }
  .callout-icon { font-size: 16px; flex-shrink: 0; margin-top: 1px; }
  .callout.info { background: var(--blue-light); border-left: 3px solid var(--blue); color: #0c4a6e; }
  .callout.tip { background: #f0fdf4; border-left: 3px solid var(--green); color: #14532d; }
  .callout.warn { background: #fefce8; border-left: 3px solid #eab308; color: #713f12; }

  /* ── STEPS ── */
  .steps { margin: 20px 0; }
  .step {
    display: flex;
    gap: 16px;
    margin-bottom: 16px;
    align-items: flex-start;
  }
  .step-num {
    width: 28px;
    height: 28px;
    border-radius: 50%;
    background: var(--navy);
    color: white;
    font-size: 13px;
    font-weight: 700;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    margin-top: 2px;
  }
  .step-content h4 { font-size: 14px; font-weight: 600; margin-bottom: 4px; }
  .step-content p { font-size: 13.5px; color: var(--text-2); line-height: 1.6; margin: 0; }

  /* ── SCREENSHOT PLACEHOLDER ── */
  .screenshot {
    background: var(--gray-2);
    border: 1px solid var(--gray-3);
    border-radius: 10px;
    padding: 60px 20px;
    text-align: center;
    margin: 20px 0;
    color: var(--gray-4);
    font-size: 13px;
  }
  .screenshot-label {
    display: inline-block;
    background: var(--navy);
    color: white;
    font-size: 11px;
    padding: 4px 10px;
    border-radius: 4px;
    margin-bottom: 8px;
  }

  /* ── NAVIGATION BOTTOM ── */
  .page-nav {
    display: flex;
    justify-content: space-between;
    margin-top: 48px;
    padding-top: 24px;
    border-top: 1px solid var(--gray-3);
    gap: 16px;
  }
  .page-nav-btn {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 10px 16px;
    border: 1px solid var(--gray-3);
    border-radius: 8px;
    text-decoration: none;
    color: var(--text);
    font-size: 13px;
    background: white;
    transition: all 0.12s;
    flex: 1;
  }
  .page-nav-btn:hover { border-color: var(--blue); color: var(--blue); }
  .page-nav-btn.next { justify-content: flex-end; text-align: right; }
  .page-nav-btn .nav-label { font-size: 11px; color: var(--gray-4); display: block; }
  .page-nav-btn .nav-title { font-weight: 600; display: block; }

  /* ── SECTION TAG ── */
  .section-tag {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    background: var(--blue-light);
    color: var(--blue);
    font-size: 11px;
    font-weight: 700;
    padding: 3px 10px;
    border-radius: 99px;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    margin-bottom: 12px;
  }

  /* ── ROLE BADGES ── */
  .roles {
    display: flex;
    gap: 6px;
    flex-wrap: wrap;
    margin: 12px 0 24px;
  }
  .role-badge {
    font-size: 11px;
    padding: 3px 10px;
    border-radius: 99px;
    font-weight: 600;
    border: 1px solid;
  }
  .role-fk { background: #f0fdf4; color: #166534; border-color: #bbf7d0; }
  .role-leitung { background: #eff6ff; color: #1e40af; border-color: #bfdbfe; }
  .role-sb { background: #fdf4ff; color: #7e22ce; border-color: #e9d5ff; }
  .role-all { background: var(--gray-2); color: var(--gray-5); border-color: var(--gray-3); }

  @media (max-width: 768px) {
    .sidebar { transform: translateX(-100%); }
    .main { margin-left: 0; }
    .content { padding: 24px 20px 60px; }
    .topbar { padding: 0 20px; }
  }