Trochu sme pozměnili vlastnosti, pro jistotu to vložím:

.podtext{background-color: rgba(0,0,0,0.7);" align="justify; border: 1px white; border-top-left-radius:10px; border-top-right-radius:0px;
	border-bottom-left-radius:10px;
	border-bottom-right-radius:0px;
	color: white;}
	.pozadi{width: 100%; height: 100%; position: absolute; top: 0; left: 0; z-index: -5000; attachment: fixed}
	body{margin: 10px; padding: 0px; font-family: "arial ce", "helvetica ce", arial, helvetica, sans-serif; font-size: 14px; color: rgb(255,255,255);
		background-color: #FFFFFF; min-wigth 850pxbody; background: url('pozadi.jpg') top center no-repeat; background-attachment: fixed}
	.top{width: 950px; height: 100px}
	.top-banner {width: 468px; height: 200px; margin-top: 5px; margin-left: 320px}
	.column {width: 950px; margin-top: 5px}
	.left-column {text-align: left; float: left; width: 200px; height: 850px; background-color: rgbargb(0, 0, 0) transparent}
	.right-column {float: right; width: 750px; height: auto; min-height: 850px; background-color: rgba(0,0,0,0.7); align="justify; border: 1px white;
		border-top-left-radius:0px; border-top-right-radius:10px; border-bottom-left-radius:10px; border-bottom-right-radius:10px; color:white;}
	.bottom {width: 750px; height: 40px; margin-top: 5px; margin-left: 200px; background-color: background-color: rgbargb(0, 0, 0) transparent; clear: both}

a:link    {color: white}
a:visited    {color: white}
a:active    {color: wihite}
	h1 {color: white; text-align: center;font-size: 2.7em}
	.menupismo {colo: white; font: 14pt Arial; text-align: left}
	nav ul {margin: 0px; list-style-type: none}
	nav ul li {float: left; padding: 0px 25px; margin: 0 5px; font-size: 17px; height: 62px; line-height: 4.3em}
	nav a {color: white; text-decoration: none}


	nav ul li:hover, .aktivni {background-image: -o-linear-gradient(left, rgba(36,129,201,0.6), rgba(80,180,255,0.6));
	background-image: -ms-linear-gradient(left, rgba(36,129,201,0.6), rgba(80,180,255,0.6));
	background-image: -moz-linear-gradient(left, rgba(36,129,201,0.6), rgba(80,180,255,0.6));
	background-image: -webkit-linear-gradient(left, rgba(36,129,201,0.6), rgba(80,180,255,0.6));
	background-image: linear-gradient(left, rgba(36,129,201,0.6), rgba(80,180,255,0.6));

	transition: all 0.25s ease-out;
	-moz-transition: all 0.25s ease-out;
	-o-transition: all 0.25s ease-out;
	-webkit-transition: all0.25s ease-out;

	background-size: 1000px 10px;
	-moz-background-size: 1000px 10px;
	-o-background-size: 1000px 10px;
	-webkit-background-size: 1000px 10px;
	background-size: 1000px 10px;

	width: 100px;
	margin: 0px 10px;
	height: 55px;
	color: black;
	border-top-left-radius:10px;
	border-top-right-radius:0px;
	border-bottom-left-radius:10px;
	border-bottom-right-radius:0px;
	border: 1px white;
	position: relative;
	cursor: pointer;}
button:hover, input[type=button]:hover {
	background-position:-140px;
	width:140px;
	margin: 0px;
	border-top-left-radius:10px;
	border-top-right-radius:0px;
	border-bottom-left-radius:10px;
	border-bottom-right-radius:0px;
	color:white;}
button:active, input[type=button]:hover {color:black; background-position:-140px;
	width:140px;
	margin: 0px;
	border-top-left-radius:10px;
	border-top-right-radius:0px;
	border-bottom-left-radius:10px;
	border-bottom-right-radius:0px;
	color:white;}}