      display: flex;
      justify-content: space-between;
      align-items: center;
    }

    .panel-header h3 {
      font-size: 18px;
      font-weight: 600;
      margin: 0;
    }

    .close-btn {
      background: rgba(255, 255, 255, 0.2);
      border: none;
      color: white;
      width: 32px;
      height: 32px;
      border-radius: 50%;
      cursor: pointer;
      font-size: 16px;
      display: flex;
      align-items: center;
      justify-content: center;
      transition: all 0.2s;
    }
