.main {
  display: grid;
  grid-template-columns: 1fr;
  line-height: 30px;
}

.center {
  text-align: center;
}

.margin {
  margin: 0 30px;
}

.tenbai {
  color: green;
}

.demuc {
  color: red;
}

.border {
  border: solid 2px blue;
  /* max-width: 300px;  */
  margin: auto 50px;
  line-height: 0px;
  border-radius: 25px 25px 25px 25px;
  background-color: gray;
  text-align: center;
}

@media only screen and (max-width: 46.1875em) {
  .border {
    border: solid 2px blue;
    margin: 0px 0px;
    line-height: 0px;
    border-radius: 25px 25px 25px 25px;
    background-color: gray;
    text-align: center;
  }

  .margin {
    margin: 0 10px;
  }
}

@media only screen and (min-width: 46.25em) and (max-width: 63.9375em) {
  .border {
    border: solid 2px blue;
    margin: 0px 0px;
    line-height: 0px;
    border-radius: 25px 25px 25px 25px;
    background-color: gray;
    text-align: center;
  }

  .margin {
    margin: 0 10px;
  }
}
