body {background-color: #424242;
 }

.waku {width: 95%; 
 margin:0 auto;
 background-color:#f4f4f4;
 font-size: 16px;
 border-radius: 8px; 
  }

.header {
  width: 100%; 
  height: 100px;
  margin: 0px 10px 50px 10px;
  display: flex;
  justify-content: space-between;
 }
 
.fb1{
  margin: 2px;
  padding: 8px;
 }
 .fb2{
  margin: 15px;
  padding: 8px;
 }
 
 .nakami{width: 95%;
  margin:10px;  padding: 8px; 
  display:flex; 
  flex-direction: column; 
  background-color:#f4f4f4;  
}
 
.navi  {
padding: 0.4em 10em;/*文字の上下 左右の余白*/
  color: #494949;/*文字色*/
  background: #fff;/*背景色*/
  border-left: solid 1px #DF013A;/*左線*/
  border-bottom: solid 5px #DF013A;/*下線*/
  border-top: solid 1px #DF013A;
  border-right: solid 5px #DF013A;
  text-align: center;