CodePen

HTML

            
              <div class="rss">
  
  <input type="checkbox" id="buttonThree" />
  <label for="buttonThree"> <!-- class="attention" -->
    <i></i>
  </label>
  
</div><!-- /rss -->
            
          
!

↑ Insert the most common viewport meta tag

CSS

            
              *,
*:after,
*:before {
  -webkit-box-sizing: border-box;
  -moz-box-sizing: border-box;
  box-sizing: border-box;
  padding: 0;
  margin: 0;
}

/* Styles */
body {
	background-color: #ddd;
	font-family: Helvetica,Helvetica Neue,Arial;
	color: #757575;
	font-size: 14px;
	line-height: 1;
}
.clear {
	clear: both;
}
.rss {
	width: 400px;
	height: 300px;
	display: block;
	position: absolute;
	top: 50%;
	left: 50%;
	margin: -150px 0 0 -200px;
	background: #d4d5d6;
	background: -webkit-linear-gradient(top, #d4d5d6 0%, #d2d3d4 22%, #c8c9ca 68%, #c8c9ca 100%);
	background: -moz-linear-gradient(top, #d4d5d6 0%, #d2d3d4 22%, #c8c9ca 68%, #c8c9ca 100%);
	background: -o-linear-gradient(top, #d4d5d6 0%, #d2d3d4 22%, #c8c9ca 68%, #c8c9ca 100%);
	background: -ms-linear-gradient(top, #d4d5d6 0%, #d2d3d4 22%, #c8c9ca 68%, #c8c9ca 100%);
	background: linear-gradient(top, #d4d5d6 0%, #d2d3d4 22%, #c8c9ca 68%, #c8c9ca 100%);
	box-shadow: 0 2px 10px 0 rgba(0, 0, 0, 0.5);
	text-align: center;
	overflow: hidden;
}

.rss:before {
	content: "";
	background: -webkit-radial-gradient(center, ellipse cover, rgba(254,254,254,1) 0%, rgba(254,254,254,0) 50%, rgba(254,254,254,0) 100%);
	background: -moz-radial-gradient(center, ellipse cover, rgba(254,254,254,1) 0%, rgba(254,254,254,0) 50%, rgba(254,254,254,0) 100%);
	background: -o-radial-gradient(center, ellipse cover, rgba(254,254,254,1) 0%, rgba(254,254,254,0) 50%, rgba(254,254,254,0) 100%);
	background: -ms-radial-gradient(center, ellipse cover, rgba(254,254,254,1) 0%, rgba(254,254,254,0) 50%, rgba(254,254,254,0) 100%);
	background: radial-gradient(center, ellipse cover, rgba(254,254,254,1) 0%, rgba(254,254,254,0) 50%, rgba(254,254,254,0) 100%);
	width: 600px;
	height: 600px;
	display: block;
	position: absolute;
	top: -300px;
	left: 50%;
	margin-left: -300px;
	-ms-filter: "progid:DXImageTransform.Microsoft.Alpha(Opacity=70)";
	filter: alpha(opacity=70);
	opacity: 0.8;
}

label {
	width: 90px;
	height: 30px;
	display: inline-block;
	margin-top: 100px;
	position: relative;
	border-radius: 14px;
	-webkit-background-clip: padding-box;
	-moz-background-clip: padding-box;
	background-clip: padding-box;
	background: rgb(138,138,138);
	background: -webkit-linear-gradient(top, rgba(138,138,138,1) 0%, rgba(140,140,140,1) 14%, rgba(159,159,159,1) 72%, rgba(164,164,164,1) 100%);
	background: -moz-linear-gradient(top, rgba(138,138,138,1) 0%, rgba(140,140,140,1) 14%, rgba(159,159,159,1) 72%, rgba(164,164,164,1) 100%);
	background: -o-linear-gradient(top, rgba(138,138,138,1) 0%, rgba(140,140,140,1) 14%, rgba(159,159,159,1) 72%, rgba(164,164,164,1) 100%);
	background: -ms-linear-gradient(top, rgba(138,138,138,1) 0%, rgba(140,140,140,1) 14%, rgba(159,159,159,1) 72%, rgba(164,164,164,1) 100%);
	background: linear-gradient(top, rgba(138,138,138,1) 0%, rgba(140,140,140,1) 14%, rgba(159,159,159,1) 72%, rgba(164,164,164,1) 100%);
	box-shadow: inset 0 2px 5px 0 rgba(0, 0, 0, 0.1), inset 0 -1px 0 0 rgba(0, 0, 0, 0.1);
	line-height: 30px;
	font-style: normal;
	color: #fff;
	text-shadow: 0 1px 1px rgba(0,0,0,0.1);
	font-weight: bold;
	-webkit-box-reflect: below 0px
		-webkit-gradient(linear, left top, left bottom,
		color-stop(0.5, transparent),
		to(rgba(255, 255, 255, 0.3)));
	-moz-transition: all 1s ease-in;
	-webkit-transition: all 1s ease-in;
	-o-transition: all 1s ease-in;
	transition: all 1s ease-in;
	cursor: pointer;
}

label.attention:hover {
	background: rgb(238,159,7);
	background: -moz-linear-gradient(top,  rgba(238,159,7,1) 0%, rgba(240,171,8,1) 45%, rgba(243,182,15,1) 100%);
	background: -webkit-gradient(linear, left top, left bottom, color-stop(0%,rgba(238,159,7,1)), color-stop(45%,rgba(240,171,8,1)), color-stop(100%,rgba(243,182,15,1)));
	background: -webkit-linear-gradient(top,  rgba(238,159,7,1) 0%,rgba(240,171,8,1) 45%,rgba(243,182,15,1) 100%);
	background: -o-linear-gradient(top,  rgba(238,159,7,1) 0%,rgba(240,171,8,1) 45%,rgba(243,182,15,1) 100%);
	background: -ms-linear-gradient(top,  rgba(238,159,7,1) 0%,rgba(240,171,8,1) 45%,rgba(243,182,15,1) 100%);
	background: linear-gradient(to bottom,  rgba(238,159,7,1) 0%,rgba(240,171,8,1) 45%,rgba(243,182,15,1) 100%);
	filter: progid:DXImageTransform.Microsoft.gradient( startColorstr='#ee9f07', endColorstr='#f3b60f',GradientType=0 );
}
label.attention:hover:before {
	content: "☢"; /* &#9762; */
	font-size: 22px
}
input[type=checkbox]:checked ~ label.attention:hover:before  {
	content: "on";
	font-size: 14px
}


label i {
	position: absolute;
	top: -4px;
	right:60px;
	width: 36px;
	height: 36px;
	display: block;
	border-radius: 36px;
	background: rgb(255,255,255);
	background: -webkit-linear-gradient(top, rgba(255,255,255,1) 0%, rgba(252,252,252,1) 11%, rgba(228,228,228,1) 50%, rgba(221,221,221,1) 53%, rgba(205,205,205,1) 97%, rgba(191,191,191,1) 100%);
	background: -moz-linear-gradient(top, rgba(255,255,255,1) 0%, rgba(252,252,252,1) 11%, rgba(228,228,228,1) 50%, rgba(221,221,221,1) 53%, rgba(205,205,205,1) 97%, rgba(191,191,191,1) 100%);
	background: -o-linear-gradient(top, rgba(255,255,255,1) 0%, rgba(252,252,252,1) 11%, rgba(228,228,228,1) 50%, rgba(221,221,221,1) 53%, rgba(205,205,205,1) 97%, rgba(191,191,191,1) 100%);
	background: -ms-linear-gradient(top, rgba(255,255,255,1) 0%, rgba(252,252,252,1) 11%, rgba(228,228,228,1) 50%, rgba(221,221,221,1) 53%, rgba(205,205,205,1) 97%, rgba(191,191,191,1) 100%);
	background: linear-gradient(top, rgba(255,255,255,1) 0%, rgba(252,252,252,1) 11%, rgba(228,228,228,1) 50%, rgba(221,221,221,1) 53%, rgba(205,205,205,1) 97%, rgba(191,191,191,1) 100%);
	box-shadow: inset 0 -3px 3px 0 rgba(0, 0, 0, 0.1), inset 0 -1px 1px 0 rgba(255, 255, 255, 0.4), 0 2px 0 0 rgba(0, 0, 0, 0.2);
	-webkit-transition: all 200ms ease;
	-moz-transition: all 200ms ease;
	-o-transition: all 200ms ease;
	-ms-transition: all 200ms ease;
	transition: all 200ms ease;
}

label i:before {
	content: "";
	display: block;
	position: absolute;
	top: 50%;
	left: 50%;
	width: 18px;
	height: 18px;
	margin: -9px 0 0 -9px;
	border-radius: 18px;
	background: rgb(239,239,239);
	background: -webkit-linear-gradient(top, rgba(239,239,239,1) 0%, rgba(225,225,225,1) 6%, rgba(225,225,225,1) 24%, rgba(229,229,229,1) 94%, rgba(242,242,242,1) 100%);
	background: -moz-linear-gradient(top, rgba(239,239,239,1) 0%, rgba(225,225,225,1) 6%, rgba(225,225,225,1) 24%, rgba(229,229,229,1) 94%, rgba(242,242,242,1) 100%);
	background: -o-linear-gradient(top, rgba(239,239,239,1) 0%, rgba(225,225,225,1) 6%, rgba(225,225,225,1) 24%, rgba(229,229,229,1) 94%, rgba(242,242,242,1) 100%);
	background: -ms-linear-gradient(top, rgba(239,239,239,1) 0%, rgba(225,225,225,1) 6%, rgba(225,225,225,1) 24%, rgba(229,229,229,1) 94%, rgba(242,242,242,1) 100%);
	background: linear-gradient(top, rgba(239,239,239,1) 0%, rgba(225,225,225,1) 6%, rgba(225,225,225,1) 24%, rgba(229,229,229,1) 94%, rgba(242,242,242,1) 100%);
	box-shadow: inset 0 1px 0 0 rgba(0, 0, 0, 0.1);
}
label:hover i {
	box-shadow: inset 0 -3px 3px 0 rgba(0, 0, 0, 0.1), inset 0 -1px 1px 0 rgba(255, 255, 255, 0.4), 0 2px 0 0 rgba(0, 0, 0, 0.3);
}
label:active i:before {
	box-shadow: inset 0 1px 0 0 rgba(0, 0, 0, 0.3);
}

label:before {
	content: "off";
	margin-left: 30px;
	text-transform: uppercase;
	-webkit-transition: all 200ms ease;
	-moz-transition: all 200ms ease;
	-o-transition: all 200ms ease;
	-ms-transition: all 200ms ease;
	transition: all 200ms ease;
}

label:after {
	content: "dont't turn me";
	right: 85px;
	width: 150px;

	text-transform: uppercase;
	font-size: 10px;
	font-weight: bold;
	color: #999;
	text-shadow: 0 1px 1px rgba(255,255,255,0.5), 0 -1px 1px rgba(0,0,0,0.1);
	position: absolute;
	top: 0;
}

input[type=checkbox]:checked ~ label:before {
	content: "on";
	text-transform: uppercase;
	margin-right: 30px;
	margin-left: 0;
}

input[type=checkbox]:checked ~ label:after {
	content: "to bed";
	right: -130px;
}

input[type=checkbox]:checked ~ label{
	background: rgb(141,173,51);
	background: -webkit-radial-gradient(center, ellipse cover, rgba(141,173,51,1) 0%, rgba(146,178,55,1) 24%, rgba(157,187,64,1) 55%, rgba(166,194,78,1) 100%);
	background: -moz-radial-gradient(center, ellipse cover, rgba(141,173,51,1) 0%, rgba(146,178,55,1) 24%, rgba(157,187,64,1) 55%, rgba(166,194,78,1) 100%);
	background: -o-radial-gradient(center, ellipse cover, rgba(141,173,51,1) 0%, rgba(146,178,55,1) 24%, rgba(157,187,64,1) 55%, rgba(166,194,78,1) 100%);
	background: -ms-radial-gradient(center, ellipse cover, rgba(141,173,51,1) 0%, rgba(146,178,55,1) 24%, rgba(157,187,64,1) 55%, rgba(166,194,78,1) 100%);
	background: radial-gradient(center, ellipse cover, rgba(141,173,51,1) 0%, rgba(146,178,55,1) 24%, rgba(157,187,64,1) 55%, rgba(166,194,78,1) 100%);
}

input[type=checkbox]:checked ~ label i {
	right: -6px;
}

/* you can hide leter */
input:before {
	content: "Logic:";
	margin-left: -35px;
	font-size: 10px;
	color: #333;
}
input {
	position: absolute;
	bottom: 5px;
	left: 50%;
	margin-left: 10px;
	opacity: .1;
  -webkit-transition: all 0.3s ease-out; 
     -moz-transition: all 0.3s ease-out; 
       -o-transition: all 0.3s ease-out; 
          transition: all 0.3s ease-out; 
} 
input:hover {
	opacity: 1;
}
            
          
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JS

            
              /***
This is a pure-CSS3 button switch example. NO JS!

Design: 
  Fernando Maclen 
  http://drbl.in/dMpc

Front-End: 
  Riza Selcuk Saydam 
  http:/webmagazin.co

***/
            
          
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