*:before, *:after{
    box-sizing: border-box;
}
html {
    background-image: none;
}

.background{
    top: 0; left: 0; width: 100%; height: 100%; position: absolute; z-index: -100; background-image: url(../img/patapon1_3840x2160.jpg); background-repeat: no-repeat; background-size: cover;
    opacity: 0.9;
}
#log{
    z-index: 0;
    /*background-image: url(../img/leuchtturm-720x720px.png);*/
    background-repeat: no-repeat;
    background-size: cover;
    width: 240px;
    height: 240px;
    position: center center;
    margin-top: 13px;
    margin-left: 13px;
    /*border: 1px solid black;*/
    border: 1px solid gray;
    border-radius: 10px;
    opacity: 0.9;
}
#ueberschrift{
    margin-left: 15px;
    color: white;
    font-family: sans-serif;
}
#eingabefeld {
    margin-left: 10px;
    height: 30px;
    width: 212px;
    border-radius: 5px;
    opacity: 0.7;
}
#btn_login{
    /* display: block;
    float: left; */
    margin-left: 10px;
    /* margin-top: 30px; */
    width: 100px;
    height: 30px;
    border-radius: 5px;
    opacity: 0.7;
}
#btn_abmelden{
    background-color: black;
    display: block; 
    width: 100px;
    height: 28px;
    margin-left: 125px;
    margin-top: -30px;
    
    /*color: orangered;*/
    color: #f3326c;
    /*color: #63ee2f;*/
    font-size: 14px;
    font-weight: bold;
    text-decoration-line: none;
    line-height: 28px;
    border: 1px solid black;
    border-radius: 5px;
    opacity: 0.7;
}
a{
    /* Link "Logout" im Abmelde-Button */
    color: red;
    font-family: sans-serif;
    line-height: 1.2em;
    text-align: center;
}
#footer {
	/* Footer */
    background-color: #657979;
	position: absolute;
	bottom: 0;
	width: 100%;
	height: 40px;
    text-align: center;
	
	/* Schrift: */
	line-height: 40px;
	font-size: 1.2em; /* entspr. 1.2 x 16px = 19.2px */
	/*font-size: 90%; */
	color: white;
}
#htmref {
	margin-left: 15px;
    color: #ff3000;
}


@media only screen(max-width: 2560px) and (orientation: portrait){
    .scale{
        height: 100%;
        width: auto;
    }
}