body{background-color:#000;margin:0;color:#fff}*{box-sizing:border-box}.stack-component{width:480px}.stack{width:200px;display:flex;flex-direction:column}.stack-item{background-color:gray;padding:5px;border:1px solid white}.stack-item:hover{background-color:#d3d3d3;color:#000}.stack-top-item{background-color:#90ee90;color:#000}.stack-delimitation-line{width:200px;background-color:red;height:5px}.heap{width:300px;display:flex;flex-direction:column}.heap-pair{width:200px;display:flex;flex-direction:row}.heap-pair:hover,.heap-pair-hover{background-color:#d3d3d3;color:#000}.heap-item{width:200px;padding:5px;border:1px solid white}.heap-pointer{padding:5px;border:1px solid white}.controls{width:300px}.controls-push-input{width:40px}.errors{width:300px}.program-state{flex-direction:column}.program-state-first-row{flex-direction:row;display:flex}