.sec-navi-outer{position:relative;width:auto;height:auto;margin-top:100px;border-bottom:solid 1px rgb(43,46,51);}
.sec-navi-center{width:auto;margin:0 auto;height:50px;}
.sec-navi-inner{width:280px;height:50px;margin:0 auto;}
#back-btn, #overview, #forward-btn, #back-btn-none, #forward-btn-none{width:33.3333%;height:50px;float:left;background-repeat:no-repeat;background-position:center;}
#back-btn-none,#forward-btn-none{opacity:0.25;}
#back-btn, #back-btn-none{background-image:url(../../images/icons/main/back-btn.svg);}
#overview{background-image:url(../../images/icons/main/galerie-back.svg);}
#forward-btn, #forward-btn-none{background-image:url(../../images/icons/main/forward-btn.svg);}
a #back-btn:hover, #overview:hover, #forward-btn:hover{background-color:rgba(43,46,51,1);-webkit-transition:background-color .3s ease;-moz-transition:background-color .3s ease;-o-transition:background-color .3s ease;transition:background-color .3s eas}
a #back-btn:hover{background-image:url(../../images/icons/main/back-btn-hover.svg);}
a #overview:hover{background-image:url(../../images/icons/main/galerie-back-hover.svg);}
a #forward-btn:hover{background-image:url(../../images/icons/main/forward-btn-hover.svg);}
#firm{width:100%;margin-top:-100px;}
.referencebox-outer{margin:0em 0em 3em 0em;width:70vw;height:65vh;border:solid 1px rgb(43,46,51);}
@media only screen and (min-width:0em) and (max-width:40em){.sec-navi-outer{margin-top:100px;padding-bottom:20px;}
.sec-navi-inner{width:100%;}
a #back-btn:hover, #overview:hover, #forward-btn:hover{background-color:rgba(43,46,51,0);}
a #back-btn:hover{background-image:url(../../images/icons/main/back-btn.svg);}
a #overview:hover{background-image:url(../../images/icons/main/galerie-back.svg);}
a #forward-btn:hover{background-image:url(../../images/icons/main/forward-btn.svg);}
.positionbox-center{display:block;margin:1em;}
.referencebox-outer{width:100%;}
#firm{margin-top:-70px;}
}