a:focus-visible,button:focus-visible{outline:2px solid currentColor;outline-offset:3px}
img{max-width:100%;height:auto}.social-button,.social-buttons,.twitter-tweet,.hatena-bookmark-button{display:none}.menu>li{position:relative}.menu .sub-menu{position:absolute;top:100%;left:0}a:hover{text-decoration:underline}

#breadcrumbs,#breadcrumbs a,#breadcrumbs li{color:#555}.breadcrumb,#breadcrumb,.breadcrumb a{color:#555}span[style*="ff0000"]{color:#9f1919!important}
.fa{font-family:FontAwesome}.breadcrumb li,.breadcrumb span{color:#555!important}
#totop .fa-angle-double-up:before{content:"↑";font-family:Arial,sans-serif;color:#fff;font-size:24px}