header {
      /* background-color: #a5e8e8; */
      /* background-color: #4682b4; */
      /* background-color: #778899; */
      display: flex;
      justify-content: space-between;
      align-items: center;
      /* vertikální zarovnání do středu */
      background-color: #a4ccc8;
      text-align: left;
      font-family: cursive;
      height: 30px;
      position: sticky;
      top: 0;
      border-radius: 0 0 10px 10px;
      font-size: 10px;
      z-index: 1000;
  }

  header h1 {
      margin: 0;
      padding: 0;
      font-size: 15px;
      line-height: 30px;
      margin-left: 10px;
      color: #ffffff;
      display: inline-block;
  }

  .header-right{
      margin-top: 26px;
      cursor: pointer;
      font-size: 24px;
  }

  .header-right span {
      /* margin-left: 15px; */
      cursor: pointer;
      font-size: 24px;
  }

  header button {
        background-color: #a4ccc8;
        color: white;
        border: none;
        /* padding: 10px 20px; */
        font-size: 18px;
        border-radius: 5px;
        cursor: pointer;
        display: inline-block;
    }
 header button:hover {
        background-color: #3367D6;
    }
  /* .headerNav {
      background-color: #f0f0f0;
      padding: 10px;
      text-align: center;
      width: 100%;
  } */
  #google-signin-button {
      width: 220px;
      position: absolute;
      right: 6px;
      top: 10px;
  }

  /* Fixed panel s tlačítky */
  .fixed-panel {
      position: fixed;
      top: 20px;
      right: 20px;
      display: flex;
      /* flex-direction: column; */
      gap: 12px;
      z-index: 1000;
  }

  .panel-btn {
      width: 50px;
      height: 50px;
      border-radius: 50%;
      border: none;
      background: white;
      box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
      cursor: pointer;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 20px;
      transition: all 0.3s ease;
      color: #2c3e50;
  }

  .panel-btn:hover {
      transform: translateY(-3px);
      box-shadow: 0 6px 15px rgba(0, 0, 0, 0.2);
  }

  /* Konkrétní barvy pro tlačítka */
  .btn-home {
      background: #3498db;
      color: white;
  }

  .btn-search {
      background: #2ecc71;
      color: white;
  }

  .btn-settings {
      background: #8dc48b;
      color: white;
  }

  /* Tooltipy */
  .tooltip {
      position: relative;
  }

  .tooltip::after {
      content: attr(data-tooltip);
      position: absolute;
      right: 60px;
      top: 50%;
      transform: translateY(-50%);
      background: rgba(0, 0, 0, 0.8);
      color: white;
      padding: 5px 12px;
      border-radius: 4px;
      font-size: 14px;
      white-space: nowrap;
      opacity: 0;
      visibility: hidden;
      transition: all 0.3s ease;
  }

  .tooltip:hover::after {
      opacity: 1;
      visibility: visible;
  }

  /* Responzivita */
  @media (max-width: 600px) {
      .fixed-panel {
          top: 10px;
          right: 10px;
      }

      .panel-btn {
          width: 45px;
          height: 45px;
          font-size: 18px;
      }
  }