body {
  background: url(./parts/back.gif);
  background-attachment:fixed;
}
.waku{
  background-color:black;
  padding: 30px 40px;
  border-radius: 25px;
}

.btn {
  cursor: pointer;
  text-decoration: none;
  margin-left:50px;
  margin-top:10px;
  width: 200px;
}

.btn:hover{
  filter: brightness(50%);
}

.mainicon{
  margin-left:10%;
  width: 40%;
  float: left;  /* 回り込み */
}

#licon{
  max-width: 250px;
  min-width: 100px;
  width: 50%;
}
#icon{
  max-width: 400px;
  min-width: 150px;
  width: 70%;
  border-width : 1px;
  border-color : #ffffff;
}

.maintab{
  float: left;  /* 回り込み */
  margin-left:5%;
  width: 25%;
}

.tab{
  width: 70%; 
}

#ticon{
  cursor: pointer;
  width: 100%;
}
#ticon:hover{
  filter: brightness(50%);
}

.waku_t{
  width:230px;
}