#okno {
        width: 300px;
        height: 50px;
        text-align: center;
        padding: 15px;
        border: 3px solid #0000cc;
        border-radius: 10px;
        color: #0000cc;
        display: none;
        position: absolute;
        top: 0;
        right: 0;
        bottom: 0;
        left: 0;
        margin: auto;
      }
      #okno:target {display: block;}
      .close {
        display: inline-block;
        border: 1px solid #0000cc;
        color: #0000cc;
        padding: 0 12px;
        margin: 10px;
        text-decoration: none;
        background: #f2f2f2;
        font-size: 14pt;
        cursor:pointer;
      }
      .close:hover {background: #e6e6ff;}