Babylon.js/inspector/src/components/sceneExplorer/sceneExplorer.scss

#scene-explorer-host {
    position: absolute;
    left: 0px;
    top:0px;
    bottom: 0px;

    &:focus {
        outline: none;
    }
}

#__resizable_base__ {
    display: none;
}

.context-menu {
    background: #222222;

    .react-contextmenu-item {
        padding: 10px;
        cursor: pointer;

        &:hover {
            background: #555555;
        }
    }
}

.react-contextmenu.context-menu.react-contextmenu--visible {
    z-index: 99;
    transform: scale(1);
}

#sceneExplorer {
    background: #333333;
    height: 100%;
    margin: 0;
    padding: 0;
    display: grid;
    grid-template-rows: auto 1fr;
    font: 14px "Arial";

    &:focus {
        outline: none;
    }

    #header {
        height: 30px;
        font-size: 16px;
        color: white;
        background: #222222;
        grid-row: 1;
        text-align: center;
        display: grid;
        grid-template-columns: 30px 1fr 50px;        
        -webkit-user-select: none; 
        -moz-user-select: none;   
        -ms-user-select: none;    
        user-select: none;                

        #logo {
            position: relative;
            grid-column: 1; 
            width: 24px;
            height: 24px;
            display: flex;
            align-self: center;   
            justify-self: center;
        }        

        #title {
            grid-column: 2; 
            display: grid;
            align-items: center;   
            text-align: center;
        }

        #commands {
            grid-column: 3; 
            display: grid;
            align-items: center;  
            grid-template-columns: 1fr 1fr;   
            
            .expand {
                grid-column: 1;
                display: grid;
                align-items: center;   
                justify-items: center;
                cursor: pointer;     
            }

            .close {
                grid-column: 2;
                display: grid;
                align-items: center;   
                justify-items: center;
                cursor: pointer;     
            }            
        }
    }

    #tree {
       grid-row: 2; 

       overflow-x: hidden;
       overflow-y: auto;
    }

    .filter {
        display: flex;
        align-items: stretch;

        input {
            width: 100%;
            margin: 10px 40px 5px 40px;
            display: block;
            border: none;
            padding: 0;
            border-bottom: solid 1px rgb(51, 122, 183);
            background: linear-gradient(to bottom, rgba(255, 255, 255, 0) 96%, rgb(51, 122, 183) 4%);
            background-position: -1000px 0;
            background-size: 1000px 100%;
            background-repeat: no-repeat;  
            color:white;    
        }

        input:focus  {
            box-shadow: none;
            outline: none;
            background-position: 0 0;
        }
    }

    .groupContainer {
        margin-left: 0px;
        color: white;
        margin-top: 0px;
        margin-bottom: 0px;
        height: 24px;    

        -webkit-user-select: none; 
        -moz-user-select: none;   
        -ms-user-select: none;    
        user-select: none;    
        
        align-self: center;     
        display: grid;
        align-items: center;           

        &:hover {
            background: #444444;
        }

        .expandableHeader {
            display: grid;
            grid-template-columns: 1fr 20px;

            .text {
                grid-column: 1;
                display: grid;
                grid-template-columns: 20px 1fr;

                .arrow {
                    grid-column: 1;
                    margin-left: 0px;
                    color: white;
                    cursor: pointer;
                    display: inline-block;
                    margin-right: 6px;
                    opacity: 0.5;
                }

                .text-value {
                    grid-column: 2;
                    display: flex;
                    align-items: center;
                }
            }

            .expandAll {                
                opacity: 0.5;
                grid-column: 2;
                margin-right: 10px;  
            }
        }
        

    }

    .icon {
        display: grid;
        align-items: center;   
        justify-items: center;
        cursor: pointer;
    }

    .itemContainer {
        margin-left: 0px;
        color: white;
        margin-top: 0px;
        margin-bottom: 0px;
        height: 24px;   
        -webkit-user-select: none; 
        -moz-user-select: none;   
        -ms-user-select: none;    
        user-select: none;         
        display: grid;
        grid-template-columns: 20px 1fr;

        &:hover {
            background: #444444;
        }

        &.selected{
            background: #bbbbbb;
            color: black;
        }
        
        .isNotActive {
            opacity: 0.3;
        }

        .arrow {
            grid-column: 1;
            color: white;
            opacity: 0.6;
        }

        .popup {
            width: 200px;
            visibility: hidden;
            background-color: #444444;
            color: #fff;
            border: 1px solid rgba(255, 255, 255, 0.5);
            position: absolute;
            z-index: 1;
            margin-left: -180px;
            box-sizing: border-box;

            &.show {
                visibility: visible;
            }

            &:focus {
                outline: none;
            }

            .popupMenu {
                padding: 6px 5px 5px 10px;
                overflow: hidden;
                white-space: nowrap;
                text-overflow: ellipsis;
                height: 18px;
                

                &:hover {
                    background: white;
                    color: #333333;
                }
            }
        }

        .sceneNode {
            grid-column: 2;
            margin-left: -10px;
            display: grid;
            grid-template-columns: 1fr 20px 20px 20px 20px 10px 20px 20px auto 5px;
            align-items: center;
            cursor: pointer;         

            .sceneTitle {
                grid-column: 1;
                margin-right: 5px;     
                display: flex;
                align-items: center;   
                height: 24px;       
            }            

            .translation {
                grid-column: 2;
                opacity: 0.6;
               
                &.selected {
                    opacity: 1;
                }    
            }

            .rotation {
                grid-column: 3;
                opacity: 0.6;

                &.selected {
                    opacity: 1;
                }    
            }

            .scaling {
                grid-column: 4;
                opacity: 0.6;
                &.selected {
                    opacity: 1;
                }    
            }
            
            .bounding {
                grid-column: 5;
                opacity: 0.6;
                &.selected {
                    opacity: 1;
                }    
            }

            .separator {
                grid-column: 6;
                margin-left: 5px;    
                width: 5px;
                display: flex;
                align-items: center;   
                height: 18px;           
                border-left: solid 1px rgb(51, 122, 183);
            }

            .pickingMode {
                grid-column: 7;
                opacity: 0.6;

                &.selected {
                    opacity: 1;
                }
            }

            .refresh {
                grid-column: 8;
            }

            .extensions {
                width: 20px;
                grid-column: 9;
            }
        }

        .animationGroupTools {
            grid-column: 2;
            width: 100%;
            display: grid;
            grid-template-columns: 1fr auto 5px;
            align-items: center;
            min-width: 0;
           
            .extensions {
                width: 20px;
                grid-column: 2;
            }
        }

        .meshTools {
            grid-column: 2;
            width: 100%;
            display: grid;
            grid-template-columns: 1fr 20px 20px auto 5px;
            align-items: center;
            min-width: 0;

            .bounding-box {
                grid-column: 2;    
                opacity: 0.5;
                
                &.selected {
                    opacity: 1;
                }
            }

            .visibility {
                grid-column: 3;          
            }        
            
            .extensions {
                width: 20px;
                grid-column: 4;
            }
        }

        .cameraTools {
            grid-column: 2;
            display: grid;
            grid-template-columns: 1fr 20px auto 5px;
            align-items: center;

            .activeCamera {
                grid-column: 2;
            }

            .extensions {
                width: 20px;
                grid-column: 3;
            }
        }

        .lightTools {
            grid-column: 2;
            display: grid;
            grid-template-columns: 1fr 20px 20px auto 5px;
            align-items: center;

            .enableLight {
                grid-column: 2;
            }

            .extensions {
                width: 20px;
                grid-column: 3;
            }
        }

        .materialTools {
            grid-column: 2;
            display: grid;
            grid-template-columns: 1fr auto 5px;
            align-items: center;

            .extensions {
                width: 20px;
                grid-column: 2;
            }
        }

        .postProcessTools {
            grid-column: 2;
            display: grid;
            grid-template-columns: 1fr auto 5px;
            align-items: center;

            .extensions {
                width: 20px;
                grid-column: 2;
            }
        }

        .renderingPipelineTools {
            grid-column: 2;
            display: grid;
            grid-template-columns: 1fr auto 5px;
            align-items: center;

            .extensions {
                width: 20px;
                grid-column: 2;
            }
        }

        .textureTools {
            grid-column: 2;
            display: grid;
            grid-template-columns: 1fr auto 5px;
            align-items: center;

            .extensions {
                width: 20px;
                grid-column: 2;
            }
        }      

        .adtextureTools {
            grid-column: 2;
            display: grid;
            grid-template-columns: 1fr 20px auto 5px;
            align-items: center;
            
            .pickingMode {
                grid-column: 2;
                opacity: 0.6;

                &.selected {
                    opacity: 1;
                }
            }

            .extensions {
                width: 20px;
                grid-column: 3;
            }
        }         

        .controlTools {
            grid-column: 2;
            display: grid;
            grid-template-columns: 1fr 20px 20px auto 5px;
            align-items: center;

            .highlight {
                grid-column: 2;
            }

            .visibility {
                grid-column: 3;
            }

            .extensions {
                width: 20px;
                grid-column: 4;
            }
        }   
        
        .transformNodeTools {
            grid-column: 2;
            display: grid;
            grid-template-columns: 1fr auto 5px;
            align-items: center;

            .extensions {
                width: 20px;
                grid-column: 2;
            }
        }    

        .skeletonTools {
            grid-column: 2;
            display: grid;
            grid-template-columns: 1fr auto 5px;
            align-items: center;

            .extensions {
                width: 20px;
                grid-column: 2;
            }
        }  

        .title {
            grid-column: 1;
            background: transparent;
            white-space: nowrap;
            overflow: hidden;
            min-width: 0;
            margin-right: 5px;     
            display: grid;
            align-items: center;  
            grid-template-columns: 25px 1fr; 
            height: 24px;
            cursor: pointer;

            .titleIcon {
                grid-column: 1;
                display: grid;
                align-items: center; 
                justify-items: center;
            }

            .titleText {
                grid-column: 2;
                white-space: nowrap;
                text-overflow: ellipsis;
                overflow: hidden;                
            }
        }
    }
}