html {
  box-sizing: border-box;
}

*, *::before, *::after {
  box-sizing: inherit; /* [1] */
  margin: 0;
  padding: 0;
}

body {
  font-family: -apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Oxygen-Sans,Ubuntu,Cantarell,"Helvetica Neue",sans-serif; /* [2] */
}

.header {
  width: 100%;
  display: flex;
  justify-content: center;
  align-items: center;
  height: 80px;
  background-color: #525286;
  color: #FFFFFF;
  margin-bottom: 50px;
}

.container {
  width: 960px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  grid-gap: 20px;
}

.socket {
  text-align: center;
  margin-bottom: 5px;
}

.button-off {
	background-color:#fc0000;
	-moz-border-radius:28px;
	-webkit-border-radius:28px;
	border-radius:28px;
	border:1px solid #000000;
	display:inline-block;
	cursor:pointer;
	color:#ffffff;
	font-family:Arial;
	font-size:17px;
	padding:16px 31px;
	text-decoration:none;
	text-shadow:0px 1px 0px #000000;
}
.button-off:hover {
	background-color:red;
}
.button-off:active {
	position:relative;
	top:1px;
}

.button-on {
	background-color:#44c767;
	-moz-border-radius:28px;
	-webkit-border-radius:28px;
	border-radius:28px;
	border:1px solid black;
	display:inline-block;
	cursor:pointer;
	color:#ffffff;
	font-family:Arial;
	font-size:17px;
	padding:16px 31px;
	text-decoration:none;
	text-shadow:0px 1px 0px #2f6627;
}
.button-on:hover {
	background-color:#5cbf2a;
}
.button-on:active {
	position:relative;
	top:1px;
}