.bt-menu,.bt-overlay{position:absolute;width:100%}.bt-menu{top:0;right:0;background-color:transparent;-webkit-backface-visibility:hidden;-webkit-transition:border-width .3s,background-color .3s,height 0s .3s;transition:border-width .3s,background-color .3s,height 0s .3s}.bt-menu-close{display:none}.bt-menu.bt-menu-open{height:100%;border-width:30px 30px 30px 90px;background-color:rgba(0,0,0,.8);-webkit-transition:border-width .3s,background-color .3s;transition:border-width .3s,background-color .3s;z-index:9}.bt-menu-trigger span,.bt-menu-trigger.black span{background-color:#000}.bt-menu-open .bt-overlay{height:100%}.bt-menu-trigger{position:relative;top:10px;display:block;width:30px;height:30px;cursor:pointer;float:right;z-index:100;right:20px}.bt-menu-trigger span{position:absolute;top:90%;left:0;display:block;width:100%;height:4px;margin-top:-2px;font-size:0;-webkit-touch-callout:none;-webkit-user-select:none;-khtml-user-select:none;-moz-user-select:none;-ms-user-select:none;user-select:none;-webkit-transition:background-color .3s;transition:background-color .3s}.bt-menu-trigger span.open{background-color:transparent}.bt-menu-trigger span:after,.bt-menu-trigger span:before{position:absolute;left:0;width:100%;height:100%;background:#000;content:'';-webkit-transition:-webkit-transform .3s;transition:transform .3s}.bt-menu-trigger.black span:after,.bt-menu-trigger.black span:before{background:#000}.bt-menu-trigger span.open:after,.bt-menu-trigger span.open:before{background:#fff!important}.bt-menu-trigger span:before{-webkit-transform:translateY(-250%);transform:translateY(-250%)}.bt-menu-trigger span:after{-webkit-transform:translateY(250%);transform:translateY(250%)}.bt-menu-trigger span.open:before{-webkit-transform:translateY(0) rotate(45deg);transform:translateY(0) rotate(45deg)}.bt-menu-trigger span.open:after{-webkit-transform:translateY(0) rotate(-45deg);transform:translateY(0) rotate(-45deg)}