.ol-popup {  
        position: absolute;  
        background-color: white;  
        -webkit-filter: drop-shadow(0 1px 4px rgba(0,0,0,0.2));  
        filter: drop-shadow(0 1px 4px rgba(0,0,0,0.2));  
        padding: 15px;  
        border-radius: 10px;  
        border: 1px solid #cccccc;  
        bottom: 12px;  
        left: -50px;  
      }  
      .ol-popup:after, .ol-popup:before {  
        top: 100%;  
        border: solid transparent;  
        content: " ";  
        height: 0;  
        width: 0;  
        position: absolute;  
        pointer-events: none;  
      }  
      .ol-popup:after {  
        border-top-color: white;  
        border-width: 10px;  
        left: 48px;  
        margin-left: -10px;  
      }  
      .ol-popup:before {  
        border-top-color: #cccccc;  
        border-width: 11px;  
        left: 48px;  
        margin-left: -11px;  
      }  
      .ol-popup-closer1 {  
        text-decoration: none;  
        position: absolute;  
        top: 2px;  
        right: 8px;  
      }  
      .ol-popup-closer1:after {  
        content: "✖";  
      }