.header {
      /* layout header */
      display: flex;
      justify-content: space-between;
      align-items: center;
      padding: 6px 10px;
      width: 100%;
      box-sizing: border-box;

      /* glass style */
      background: rgba(255, 255, 255, 0.25);
      backdrop-filter: blur(14px);
      border-top: 2px solid rgba(255, 255, 255, 0.4);
      border-bottom: 2px solid rgba(255, 255, 255, 0.4);

      /* nested element styling */
    }