body {
      font-family: Arial, sans-serif;
      margin: 0;
      background: #f5f5f5;
      color: #333;
      line-height: 1.6;
    }

    header {
      background: #222;
      color: #fff;
      text-align: center;
      padding: 20px;
    }

    nav {
      display: flex;
      justify-content: center;
      background: #444;
      flex-wrap: wrap;
    }

    nav button {
      background: none;
      border: none;
      color: #fff;
      padding: 15px 20px;
      cursor: pointer;
      transition: background 0.3s;
      font-size: 16px;
    }

    nav button.active,
    nav button:hover {
      background: #666;
    }

    section {
      display: none;
      max-width: 1000px;
      margin: 20px auto;
      background: #fff;
      padding: 20px;
      border-radius: 8px;
      box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
    }

    section.active {
      display: block;
    }

    .accordion {
      background: #eee;
      cursor: pointer;
      padding: 12px;
      margin: 5px 0;
      border-radius: 5px;
      border: 1px solid #ccc;
      transition: all 0.2s ease;
      /* important for soft Animation */
    }

    .accordion.active {
      background: #ddd;
    }

    /* Hover-Animation */
    .accordion:hover {
      background: #ddd;
      /* change color */
      transform: translateY(-2px) scale(1.01);
      /* smoothe up and zoom */
      box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
      /* leichter Schatten */
    }

    a img {
      width: 40%;
      height: auto;
      border-radius: 12px;
      box-shadow: 0 3px 8px rgba(0, 0, 0, 0.1);
      transition: transform 0.45s cubic-bezier(0.25, 0.1, 0.25, 1),
        box-shadow 0.45s cubic-bezier(0.25, 0.1, 0.25, 1);
      display: inline-block;
      cursor: pointer;
    }

    a img:hover {
      transform: translateY(-4px) translateX(2px) scale(1.025);
      box-shadow: 0 8px 16px rgba(0, 0, 0, 0.18);
    }

    .panel {
      display: none;
      padding: 10px 15px;
      border-left: 3px solid #444;
      margin-bottom: 5px;
    }

    .panel.active {
      display: block;
    }

    pre {
      background: #eee;
      padding: 10px;
      overflow-x: auto;
      border-radius: 5px;
    }

    ul {
      padding-left: 20px;
    }

    table {
      border-collapse: collapse;
      width: 100%;
      margin-top: 10px;
    }

    th,
    td {
      border: 1px solid #ccc;
      padding: 8px;
      text-align: center;
    }

    th {
      background-color: #f0f0f0;
    }