body {
  font: 16px 'Helvetica Neue',Helvetica,Arial,'ヒラギノ角ゴ ProN W3','Hiragino Kaku Gothic ProN','メイリオ',Meiryo,sans-serif;
}
h1 {
  text-decoration: underline;
}
#container {
  width: 980px;
  margin: 0 auto;
}

#calendar {
  width: 320px;
  color: #616B76;
  text-align: center;
  background-color: #fff; }

  #calendar table {
    padding: 0;
    margin: 0; }

    th:first-child, td:first-child {
      border-left: 1px solid #A2ADBC;
    }

    th, td {
      margin: 0;
      border-right: 1px solid #A2ADBC;
      border-bottom: 1px solid #A2ADBC;
    }

    th {
      font-weight: bold;
      background: #D9E2E1;
      border-top: 1px solid #A2ADBC;
    }

    td {
      width: 40px;
      height: 40px;
    }