body {
  font-family: Meiryo, Arial, Helvetica, sans-serif;
  width: 1200px;
  max-width: 100%;
  margin: auto;
  font-size: 17px;
  background-color: #5fe8fa;
  background-image: linear-gradient(#0fdaf5 50%, transparent 50%);
  background-size: 10px 10px;
}

div.main {
  background-color: #ffffff;
  border-left: double 5px #4ec4d3;
  border-bottom: double 5px #4ec4d3;
  border-right: double 5px #4ec4d3;
}

div.maincontent {
  padding: 10px;
}


a {
  color: #0000ee;
}

a.anda-kesu {
  text-decoration: none;
}

div.indexlink {
  width: calc(100% - 5px);
  padding: 6px 0 6px 6px;
  margin-bottom: 5px;
  border: 2px solid #daa8f7ab;
  background-color: #e0ffea;
  color: black;
  transition: 0.3s;
}

h2 {
  background: #f4f4f4;
  border-left: solid 6px #5bb7ae;
  box-shadow: 0px 2px 3px rgba(0, 0, 0, 0.33);
  padding: 7px;
  font-weight: bold;
}

h3 {
  background-color: #f4f4f4 ;
  border-bottom: 3px dotted #5bb7ae;
  border-left: 3px dotted #5bb7ae;
  padding: 4px;
  padding-left: 6px;
  text-align: left;
}


::selection {
  background-color: #a8d0f799;
  color:black;
}