Ce este astrofizica și la ce folosește?

#iguru_soc_icon_wrap_6717164479428 a{ background: transparent; }#iguru_soc_icon_wrap_6717164479428 a:hover{ background: transparent; border-color: #7cbc61; }#iguru_soc_icon_wrap_6717164479428 a{ color: #7cbc61; }#iguru_soc_icon_wrap_6717164479428 a:hover{ color: #ffffff; }.iguru_module_social #soc_icon_67171644794501{ color: #ffffff; }.iguru_module_social #soc_icon_67171644794501:hover{ color: #7cbc61; }.iguru_module_social #soc_icon_67171644794501{ background: rgba(255,255,255,0.01); }.iguru_module_social #soc_icon_67171644794501:hover{ background: rgba(255,255,255,0.01); }.iguru_module_social #soc_icon_67171644794642{ color: #ffffff; }.iguru_module_social #soc_icon_67171644794642:hover{ color: #7cbc61; }.iguru_module_social #soc_icon_67171644794642{ background: rgba(255,255,255,0.01); }.iguru_module_social #soc_icon_67171644794642:hover{ background: rgba(255,255,255,0.01); }