html,body {
    padding:0;
    margin:0;
    height:100%;
}

body {
    width:100%;
}

.row {
    width:100%;
    height:50%;
}

.row div {
    width:33%;
    height:100%;
    float:left;
}

button.calcbutton {
	display: inline-block;
	position: relative;
	padding: 0;
	line-height: normal;
	cursor: pointer;
	vertical-align: middle;
	text-align: center;
	overflow: visible; /* removes extra width in IE */
	width:24%;
	height:24%;
}

button.calcbutton2 {
	display: inline-block;
	position: relative;
	padding: 0;
	line-height: normal;
	cursor: pointer;
	vertical-align: middle;
	text-align: center;
	overflow: visible; /* removes extra width in IE */
	width:24%;
	height:24%;
}

button.calcbutton3 {
	display: inline-block;
	position: relative;
	padding: 0;
	line-height: normal;
	cursor: pointer;
	vertical-align: middle;
	text-align: center;
	font-size:120%;
	overflow: visible; /* removes extra width in IE */
	width:12%;
	height:24%;
}

button.actionbutton {
	display: inline-block;
	position: relative;
	padding: 0;
	line-height: normal;
	cursor: pointer;
	vertical-align: middle;
	text-align: center;
	overflow: visible; /* removes extra width in IE */
	width:32%;
	height:32%;
}

div.wrapper{
	float:left; /* important */
	position:relative; /* important(so we can absolutely position the description div */
	width:21.5%;
	height:23%;
	margin:1%;
	border: 0.1em solid;
	box-shadow: 3px 3px 2px #888;
	text-align: center;
}

div.wrapper2{
	float:left; /* important */
	position:relative; /* important(so we can absolutely position the description div */
	width:10.2%;
	height:23%;
	margin-top:0.5%;
	margin-bottom:0.5%;
	margin-left:0.5%;
	margin-right:0.5%;
	border: 0.1em solid;
	box-shadow: 3px 3px 2px #888;
	text-align: center;
}

div.description{
	position:absolute; /* absolute position (so we can position it where we want)*/
	bottom:0px; /* position will be on bottom */
	left:0px;
	width:100%;
	/* styling bellow */
	background-color:black;
	font-family: 'tahoma';
	color:white;
	opacity:0.8; /* transparency */
	filter:alpha(opacity=80); /* IE transparency */
	text-align:center;
}

@media only screen and (max-aspect-ratio: 6/4) {
	div.description{
	min-height:20%;
	}
}

p.description_content{
	padding:10px;
	margin:0px;

}

@media screen and (min-width: 892px) {
	.calcbutton{
		font-size: 18px;
	}
	.calcbutton2{
		font-size: 14px;
	}
	.actionbutton{
		font-size: 13px;
	}
	div.description{
		font-size: 15px;
	}
	.invoice{
		font-size: 14px;
	}
}

@media (max-width: 891px) and (min-width: 386px) {
	.calcbutton{
		font-size: 12px;
	}
	.calcbutton2{
		font-size: 9px;
	}
	.actionbutton{
		font-size: 12px;
	}
	div.description{
		font-size: 13px;
	}
	.invoice{
		font-size: 12px;
	}
}

@media screen and (max-width: 385px){
	.calcbutton{
		font-size: 8px;
	}
	.calcbutton2{
		font-size: 7px;
	}
	.actionbutton{
		font-size: 10px;
	}
	div.description{
		font-size: 11px;
	}
	.invoice{
		font-size: 10px;
	}
}