nav#n_nav ul.navs li{
   display: inline-block;
   margin: 10px;
   padding: 3px;
   min-width: calc(50vw / 3);
   border: 2px double gray;
   background-color: #cf9;
   text-align: center;
}
nav#n_nav ul.navs li.current{
   background-color: #0c3;
}

nav#n_nav ul.navs a,
nav#n_nav ul.navs a:visited{
   color: black;
}

ol.head_box li{
   display: inline-block;
   margin:10px;
   padding: 3px;
   min-width: calc(50vw / 3);
   width: calc(100vw / 3);
   vertical-align: top;
   min-height: 3em;
   border: 2px solid silver;
   text-align: center;
}

ol.head_box a,
ol.head_box a:visited{
   color: black;
}

p.cntct{
   margin-left: 15px;
   border: 1px solid silver;
   width: fit-content;
   padding-left: 5px;
   padding-right: 10px;
}