/* Grid units */
.u1,
.u2,
.u3,
.u4 {
    float: left;
    margin: 6px; /*3px;*/
}
.u1 {
    width: 80px; /*40px;*/
}
.u2 {
    width: 172px; /*86px;*/
}
.u3 {
    width: 132px;
}
.u4 {
    width: 356px; /*178px;*/
}

.calculator {
	-moz-border-radius: 5px;
	-webkit-border-radius: 5px;
	border-radius: 5px;
	-moz-box-shadow: inset 0px 1px #7b839b;
	-webkit-box-shadow: inset 0px 1px #7b839b;
	box-shadow: inset 0px 1px #7b839b;
	background-color: #3C4150;
	border: 1px solid #181A20;
	xfloat: left;
	padding: 12px; /*6px;*/
	width: 395px; /*184px;*/
	margin: 15px auto 0px auto;
	overflow:hidden;
}

.display {
	-moz-border-radius: 3px;
	-webkit-border-radius: 3px;
	border-radius: 3px;
	-moz-box-shadow: inset 0 1px 1px #0A0B0D, 0px 1px #5E6370;
	-webkit-box-shadow: inset 0 1px 1px #0A0B0D, 0px 1px #5E6370;
	box-shadow: inset 0 1px 1px #0A0B0D, 0px 1px #5E6370;
	-webkit-box-sizing: border-box;
    -moz-box-sizing: border-box;
    box-sizing: border-box;
	background-color: #17181E;
	border: 1px solid #181A20;
	padding: 0 10px;
	text-align: right;
	min-height: 90px;
}
.display-text {
	color: #fff;
	font-size: 44px; /*22px;*/
	line-height: 84px; /*42px;*/
	overflow: hidden;
	unicode-bidi: embed;
	width: 1000px;
    float: right;
}
.display-inner {
    width: 312px; /*156px;*/
    overflow: hidden;
}
.button {
	-moz-border-radius: 3px;
	-webkit-border-radius: 3px;
	border-radius: 3px;
	-webkit-touch-callout: none;
	-webkit-user-select: none;
	-khtml-user-select: none;
	-moz-user-select: none;
	-ms-user-select: none;
	user-select: none;
	border: 1px solid #181A20;
	color: #fff;
	cursor: pointer;
	float: left;
	font-family: Arial, Helvetica, sans-serif;
	font-size: 24px; /*12px;*/
	font-weight: bold;
	line-height: 50px; /*25px;*/
	padding: 0 8px;
	text-align: center;
	text-decoration: none;
	vertical-align: middle;
}
.button:active,
.button-active {
	position: relative;
	top: 1px;
}
.button:active,
.button:focus {
	outline: 0;
}
/* Mozilla fix */
button::-moz-focus-inner {
	padding: 0;
	border: 0;
}

/* Buttons styling exceptions */
.button-backspace {
	font-size: 34px; /*17px;*/
	font-weight: normal;
}


/* Button skins */
.button-gray {
	-moz-box-shadow: inset 0px 1px #9498A3, 0 1px 1px #323643;
	-webkit-box-shadow: inset 0px 1px #9498A3, 0 1px 1px #323643;
	box-shadow: inset 0px 1px #9498A3, 0 1px 1px #323643;
	background-color: #595E6B;
	background-image: -webkit-gradient(linear, 0 0, 0 100%, from(#656976), to(#4B505E));
	background-image: -webkit-linear-gradient(top, #656976, #4B505E);
	background-image: -o-linear-gradient(top, #656976, #4B505E);
	background-image: linear-gradient(to bottom, #656976, #4B505E);
	background-image: -moz-linear-gradient(top, #656976, #4B505E);
	background-repeat: repeat-x;
	filter: progid:dximagetransform.microsoft.gradient(startColorstr='#ff656976', endColorstr='#ff4B505E', GradientType=0);
	text-shadow: 0px -1px #181A20;
}
	.button-gray:hover {
		background-color: #666B78;
		background-image: -webkit-gradient(linear, 0 0, 0 100%, from(#757985), to(#545867));
		background-image: -webkit-linear-gradient(top, #757985, #545867);
		background-image: -o-linear-gradient(top, #757985, #545867);
		background-image: linear-gradient(to bottom, #757985, #545867);
		background-image: -moz-linear-gradient(top, #757985, #545867);
		background-repeat: repeat-x;
		filter: progid:dximagetransform.microsoft.gradient(startColorstr='#ff757985', endColorstr='#ff545867', GradientType=0);
	}
	.button-gray.active,
	.button-gray:active {
		-webkit-box-shadow: inset 0 1px 1px #14171E, 0px 1px #5E6370;
		-moz-box-shadow: inset 0 1px 1px #14171E, 0px 1px #5E6370;
		box-shadow: inset 0 1px 1px #14171E, 0px 1px #5E6370;
		background-color: #292D3A;
		background-image: none;
		filter: progid:dximagetransform.microsoft.gradient(enabled=false);
	}
.button-red {
	-moz-box-shadow: inset 0px 1px #CA9883, 0 1px 1px #323643;
	-webkit-box-shadow: inset 0px 1px #CA9883, 0 1px 1px #323643;
	box-shadow: inset 0px 1px #CA9883, 0 1px 1px #323643;
	background-color: #965F48;
	background-image: -webkit-gradient(linear, 0 0, 0 100%, from(#A46E57), to(#844D37));
	background-image: -webkit-linear-gradient(top, #A46E57, #844D37);
	background-image: -o-linear-gradient(top, #A46E57, #844D37);
	background-image: linear-gradient(to bottom, #A46E57, #844D37);
	background-image: -moz-linear-gradient(top, #A46E57, #844D37);
	background-repeat: repeat-x;
	filter: progid:dximagetransform.microsoft.gradient(startColorstr='#ffA46E57', endColorstr='#ff844D37', GradientType=0);
	text-shadow: 0px -1px #58372A;
}
	.button-red:hover {
		background-color: #A26B55;
		background-image: -webkit-gradient(linear, 0 0, 0 100%, from(#B4806A), to(#915740));
		background-image: -webkit-linear-gradient(top, #B4806A, #915740);
		background-image: -o-linear-gradient(top, #B4806A, #915740);
		background-image: linear-gradient(to bottom, #B4806A, #915740);
		background-image: -moz-linear-gradient(top, #B4806A, #915740);
		background-repeat: repeat-x;
		filter: progid:dximagetransform.microsoft.gradient(startColorstr='#ffB4806A', endColorstr='#ff915740', GradientType=0);
	}
	.button-red.active,
	.button-red:active {
		-webkit-box-shadow: inset 0 1px 1px #2A130C, 0px 1px #5E6370;
		-moz-box-shadow: inset 0 1px 1px #2A130C, 0px 1px #5E6370;
		box-shadow: inset 0 1px 1px #2A130C, 0px 1px #5E6370;
		background-color: #472619;
		background-image: none;
		filter: progid:dximagetransform.microsoft.gradient(enabled=false);
	}
	
.button-blue {
	-moz-box-shadow: inset 0px 1px #BCD6FF, 0 1px 1px #323643;
	-webkit-box-shadow: inset 0px 1px #BCD6FF, 0 1px 1px #323643;
	box-shadow: inset 0px 1px #BCD6FF, 0 1px 1px #323643;
	background-color: #598FE9;
	background-image: -webkit-gradient(linear, 0 0, 0 100%, from(#6DA1F8), to(#427BD8));
	background-image: -webkit-linear-gradient(top, #6DA1F8, #427BD8);
	background-image: -o-linear-gradient(top, #6DA1F8, #427BD8);
	background-image: linear-gradient(to bottom, #6DA1F8, #427BD8);
	background-image: -moz-linear-gradient(top, #6DA1F8, #427BD8);
	background-repeat: repeat-x;
	filter: progid:dximagetransform.microsoft.gradient(startColorstr='#ff6DA1F8', endColorstr='#ff427BD8', GradientType=0);
	text-shadow: 0px -1px #2C4E88;
}
	.button-blue:hover {
		background-color: #6E9EED;
		background-image: -webkit-gradient(linear, 0 0, 0 100%, from(#83B0FC), to(#578ADE));
		background-image: -webkit-linear-gradient(top, #83B0FC, #578ADE);
		background-image: -o-linear-gradient(top, #83B0FC, #578ADE);
		background-image: linear-gradient(to bottom, #83B0FC, #578ADE);
		background-image: -moz-linear-gradient(top, #83B0FC, #578ADE);
		background-repeat: repeat-x;
		filter: progid:dximagetransform.microsoft.gradient(startColorstr='#ff83B0FC', endColorstr='#ff578ADE', GradientType=0);
	}
	.button-blue.active,
	.button-blue:active {
		-webkit-box-shadow: inset 0 1px 1px #0E192E, 0px 1px #5E6370;
		-moz-box-shadow: inset 0 1px 1px #0E192E, 0px 1px #5E6370;
		box-shadow: inset 0 1px 1px #0E192E, 0px 1px #5E6370;
		background-color: #1E3357;
		background-image: none;
		filter: progid:dximagetransform.microsoft.gradient(enabled=false);
	}

@media only screen and (max-width: 479px) {
	.u1,.u2,.u3,.u4 {margin: 3px;}
	.u1 {width: 60px;}
	.u2 {width: 125px;}
	.u3 {width: 198px;}
	.u4 {width: 267px;}
	
	.calculator {
		padding: 9px;
		width: 285px;
	}

	.display {
		min-height:65px;
	}
	
	.display-text {
		font-size: 33px;
		line-height: 63px;
	}
	.display-inner {
    	width: 234px;
	}
	.button {
		font-size: 16px;
		line-height: 37px;	
	}
}