a {
  text-decoration: none;
}
.container {
  font-size: 16px;
  margin: 25px;
  width: 95%;
  margin: 0 auto;
}
.contents {
  width: 95%;
  background-color:#fff;
  /* 水平方向の中央揃え */
  margin: 0 auto;
}
.top_title{
  display: flex;
  border-bottom: double;
  border-color: #2399c4;
  border-width: 3px;
  box-shadow: 0 2px #0a6ea7;
  margin: 5px 0 1px 0;
  padding: 5px 0 0 0;
  font-size: 14px;
}
.top_title div{
  margin-left: auto;
  font-size: 16px;
  font-weight:bold;
  padding: 5px 10px 0 0;
}

.content_title{
  margin: 25px 0;
  text-align: center;
  font-weight:bold;
  font-size:20pt;
  color:#0aa4a9
}

.content_body{
  margin: 0 0 10px 10px; 
  text-align: left;
}

.content_item{
  margin-top: 20px;
  text-align: left;
  font-size: 14px;
  font-weight:bold;
}

.content_input{
  margin-top: 5px;
  text-align: left;
  font-size: 15px;
  padding: 4px;
}

.content_button{
  margin-top: 5px;
  margin-right: 50px;
  font-size: 16px;
  padding: 3px;
}

.navi_area {
  display: flex;
  width: 100%;
  font-size: 12pt;
  font-weight: 500;
  margin-top: 10px;
  margin-bottom: 20px;
  padding: 4px;
}
.navi_area div{
  margin-left: auto;
  font-size: 14pt;
  padding: 5px 10px 0 0;
}