table.os{
  border-collapse: collapse;
  width: 80%;
}

/*タブ切り替え全体のスタイル*/
.tabs {
  margin-top: 50px;
  padding-bottom: 40px;
  background-color: #fff;
  box-shadow: 0 0 10px rgba(0, 0, 0, 0.2);
  width: 90%;
  margin: 0 auto;
}

/*タブのスタイル*/
.tab_item {
  width: calc(100%/3);
  height: 50px;
  border-bottom: 3px solid #0081cd;
  background-color: #d9d9d9;
  line-height: 50px;
  font-size: 16px;
  text-align: center;
  color: #565656;
  display: block;
  float: left;
  text-align: center;
  font-weight: bold;
  transition: all 0.2s ease;
}
.tab_item:hover {
  opacity: 0.75;
}

/*ラジオボタンを全て消す*/
input[name="tab_item"] {
  display: none;
}

/*タブ切り替えの中身のスタイル*/
.tab_content {
  display: none;
  padding: 40px 40px 0;
  clear: both;
  overflow: hidden;
}


/*タブのスタイル*/
.tab_item2 {
  width: calc(100%/2);
  height: 50px;
  border-bottom: 3px solid #0081cd;
  background-color: #d9d9d9;
  line-height: 50px;
  font-size: 16px;
  text-align: center;
  color: #565656;
  display: block;
  float: left;
  text-align: center;
  font-weight: bold;
  transition: all 0.2s ease;
}
.tab_item2:hover {
  opacity: 0.75;
}

/*ラジオボタンを全て消す*/
input[name="tab_item2"] {
  display: none;
}

/*選択されているタブのコンテンツのみを表示*/
#intro:checked ~ #intro_content,
#setup:checked ~ #setup_content,
#commondemo:checked ~ #commondemo_content,
#device:checked ~ #device_content,
#individual:checked ~ #individual_content,
#startkit:checked ~ #startkit_content {
  display: block;
}

/*選択されているタブのスタイルを変える*/
.tabs input:checked + .tab_item {
  background-color: #0081cd;
  color: #fff;
}

.btn-flat-simple {
  position: relative;
  display: block;
  font-weight: bold;
  padding: 0.5em 0.5em;
  text-decoration: none;
  color: white;
  background: #0081cd;
  transition: .4s;
  font-size: xx-large;
  text-align: center;
  border-style: solid;
}

.btn-flat-simple:hover {
  background: white;
  color: #0081cd;
  border-style: solid;
}

.btn_select {
  position: relative;
  display: inline-block;
  font-weight: bold;
  padding: 0.1em 0.5em;
  text-decoration: none;
  background: white;
  color: #0081cd;
  transition: .4s;
  font-size: xx-large;
  text-align: center;
  border-style: solid;
	margin : 0.1em
}

.btn_select:hover {
  background: #0081cd;
  color: white;
  border-style: solid;
}

#pageTop {
  position: fixed;
  bottom: 20px;
  right: 20px;
}
#pageTop i {
  padding-top: 6px
}

#pageTop a {
  content: 'PAGE TOP';
  font-size: 13px;
  color: #fffff;
  background-color:#0081cd;
  padding: 0;
  margin: auto;
  text-align: center;
  width: 70px;
  height: 70px;
  text-align: center;
  display: inline-block;
  border-radius: 50%;
}
#pageTop a:hover {
  text-decoration: none;
  opacity: 0.7;
}

#intro_content{
	font-size:15px;
}
#opst_content{
	font-size:15px;
}
img {
	max-width: 100%;
	height: auto;
}

@media(max-width: 200px){
  .grid {
  display: grid;
    grid-template-columns: 1fr;
  }
}



@media (min-width: 1024px) {
 .grid {
 display: grid;
 grid-template-columns: 1fr 1fr 1fr 1fr;
 align-items: start;
 }
 .grid-item {
 display: grid;
 grid-template-rows: 1fr;
 align-items: start;
 }
 .grid-item > * {
 align-self: start; /* 子要素も明示的に上揃い */
 }
}



h1 {
  color: #6594e0;/*文字色*/
  /*線の種類（点線）2px 線色*/
  border-bottom: dashed 1px #6594e0;
  font-size: 15px;
  height: 30px;
}

h3 {
  background: #6594e0; /*背景色*/
  padding: 0.5em;/*文字周りの余白*/
  color: white;/*文字を白に*/
  border-radius: 0.5em;/*角の丸み*/
  font-size: 20px;
}

table{
  width: 100%;
  border-collapse:separate;
  border-spacing: 0;
}

table th:first-child{
  border-radius: 5px 0 0 0;
}

table th:last-child{
  border-radius: 0 5px 0 0;
  border-right: 1px solid #3c6690;
}

table th{
  text-align: center;
  color:white;
  background: linear-gradient(#829ebc,#225588);
  border-left: 1px solid #3c6690;
  border-top: 1px solid #3c6690;
  border-bottom: 1px solid #3c6690;
  box-shadow: 0px 1px 1px rgba(255,255,255,0.3) inset;
  width: 20%;
  padding: 10px 0;
}

table td{
  text-align: center;
  border-left: 1px solid #a8b7c5;
  border-bottom: 1px solid #a8b7c5;
  border-top:none;
  box-shadow: 0px -3px 5px 1px #eee inset;
  width: 20%;
  padding: 10px 0;
}

table td:last-child{
  border-right: 1px solid #a8b7c5;
}

table tr:last-child td:first-child {
  border-radius: 0 0 0 5px;
}

table tr:last-child td:last-child {
  border-radius: 0 0 5px 0;
}


table.member {
  width: 100%;
  border-collapse:separate;
  border-spacing: 0;
}
.member th:first-child{
  border-radius: 5px 0 0 0;
}

.member th:last-child{
  border-radius: 0 5px 0 0;
  border-right: 1px solid #3c6690;
}

.member td {
  text-align: center;
  border-left: 1px solid #a8b7c5;
  border-bottom: 1px solid #a8b7c5;
  border-top:none;
  box-shadow: 0px -3px 5px 1px #eee inset;
  width: 15%;
  padding: 10px 0;
}
.member th {
  text-align: center;
  color:white;
  background: linear-gradient(#829ebc,#225588);
  border-left: 1px solid #3c6690;
  border-top: 1px solid #3c6690;
  border-bottom: 1px solid #3c6690;
  box-shadow: 0px 1px 1px rgba(255,255,255,0.3) inset;
  width: 15%;
  padding: 10px 0;
}
.member td:last-child{
  border-right: 1px solid #a8b7c5;
}

.member tr:last-child td:first-child {
  border-radius: 0 0 0 5px;
}

.member tr:last-child td:last-child {
  border-radius: 0 0 5px 0;
}