.blog-categories {
      display: flex;
      gap: 16px;
      justify-content: center;
      margin-bottom: 40px;
      flex-wrap: wrap;
    }
    .blog-category-btn {
      background: #1F2933;
      color: #3B82F6;
      border: 2px solid #3B82F6;
      border-radius: 8px;
      padding: 8px 22px;
      font-weight: 600;
      cursor: pointer;
      font-size: 1rem;
      transition: all 0.2s;
    }
    .blog-category-btn.active,
    .blog-category-btn:hover {
      background: #3B82F6;
      color: #fff;
      border-color: #1F2933;
    }
    .blog-cards {
      display: flex;
      gap: 32px;
      flex-wrap: wrap;
      justify-content: center;
    }
    .blog-card {
      background: #F9FAFB;
      border-radius: 24px;
      box-shadow: 0 4px 24px rgba(31,41,51,0.07);
      overflow: hidden;
      width: 355px;
      display: flex;
      flex-direction: column;
      margin-bottom: 32px;
      transition: box-shadow 0.2s, transform 0.2s;
    }
    .blog-card:hover {
      box-shadow: 0 10px 40px rgba(59,130,246,0.14);
      transform: translateY(-6px) scale(1.025);
    }
    .blog-card-img {
      width: 100%;
      height: 200px;
      object-fit: cover;
      display: block;
    }
    .blog-card-content {
      padding: 24px 22px 22px 22px;
      display: flex;
      flex-direction: column;
      flex-grow: 1;
    }
    .blog-card-date {
      font-size: 0.93rem;
      color: #64748B;
      margin-bottom: 6px;
    }
    .blog-card-category {
      text-transform: uppercase;
      font-size: 0.95rem;
      font-weight: 600;
      color: #3B82F6;
      margin-bottom: 5px;
      letter-spacing: 0.03em;
    }
    .blog-card-title {
      font-size: 1.23rem;
      font-weight: bold;
      color: #0F172A;
      margin-bottom: 10px;
      line-height: 1.23;
      min-height: 42px;
      /* Für einheitliche Höhe */
    }
    .blog-card-text {
      font-size: 1rem;
      color: #334155;
      margin-bottom: 16px;
      flex-grow: 1;
      overflow: hidden;
    }
    .blog-card-link {
      margin-top: auto;
      align-self: flex-start;
      background: #3B82F6;
      color: #fff;
      padding: 10px 20px;
      border-radius: 8px;
      text-decoration: none;
      font-weight: 600;
      transition: background 0.2s;
    }
    .blog-card-link:hover {
      background: #1D4ED8;
    }

    .blog-card-img {
      width: 100%;
      height: 200px;
      object-fit: cover;
      display: block;
    }

    .summary-box, .toc-box {
      background: #232c36;
      color: #f2f6fa;
      border-radius: 12px;
      padding: 18px 20px;
      margin: 0 auto 32px auto;
      max-width: 700px;
      box-shadow: 0 4px 18px rgba(0,0,0,0.07);
    }
    .summary-box {
      border-left: 4px solid #3b82f6; /* kleine blaue Markierung links */
    }
    .toc-box ul {
      padding-left: 20px;
    }
    .toc-box li {
      margin-bottom: 8px;
    }
    .toc-box a {
      color: #60a5fa;
      text-decoration: none;
    }
    .toc-box a:hover {
      text-decoration: underline;
    }

    .blog-image {
      display: block;
      margin: 24px auto 32px auto;
      max-width: 800px;
      width: 100%;
      border-radius: 18px;
      box-shadow: 0 6px 24px rgba(0,0,0,0.10);
      height: auto;
    }

    .blog-image:hover {
      box-shadow: 0 12px 32px rgba(0,0,0,0.16);
      transition: box-shadow 0.3s;
    }


    @media (max-width: 600px) {
      .blog-image {
        max-width: 98%;
        margin: 16px auto 24px auto;
        border-radius: 12px;
      }
    }

    @media (max-width: 900px) {
      .blog-cards {
        flex-direction: column;
        align-items: center;
        gap: 24px;
      }
      .blog-card {
        width: 95%;
        max-width: 400px;
      }
    }

    @media (max-width: 900px) {
      .blog-card-img {
        height: 170px;
      }
    }
    @media (max-width: 600px) {
      .blog-card-img {
        height: 120px;
      }
    }