* {
box-sizing: border-box;
font-family: "Noto Sans JP", sans-serif;
}

body {
  margin: 0;
  font-family: "Noto Sans JP", sans-serif;
  background-color: #222831;
}

.topnav {
  overflow: hidden;
  background-color: #31363F;
}

.topnav a {
  float: left;
  display: block;
  text-align: center;
  padding: 14px 16px;
  text-decoration: none;
}

.topnav a:hover {
  background-color: #76ABAE;
  color: #31363F;
}

.content {
  color: #EEEEEE;
  padding: 20px;
}

.footer {
  background-color: #31363F;
  color: #76ABAE;
  padding: 10px;
  text-align: center;
}
img{
  max-width:100%;
  height:auto;
}

a:link, a:visited {
  color: #76ABAE;
}

table{
  border: 1px solid #76ABAE;
  border-collapse: collapse;
}

th, td{
  border: 1px solid #76ABAE;
  text-align: center;
}

.footer a{
  padding: 50px;
}