header {
    background-color: darkgrey;
    /*margin:10px;*/
    padding: 100px;
}


nav{
    background-color: #f8f9fa;

}
section{
    background-color: #f8f9fa;


}
aside{
    background-color: #f8f9fa;
}
footer{
    background-color: lightgrey;
}
.btn_margin{
    margin-top:5px;
    margin-bottom: 5px;
    /*margin-left: 1px;*/
    /*margin-right: 1px;*/
}
/*.header_margin{
    margin-top:60px;
    margin-bottom: 60px;
}*/
.margin_horizontal{
    margin-right: 50px;
}
.header_padding{
    padding:25px;
    text-align: center;
    font-size: 30px;
    color:black;

}
/*vlozenie bloku textu*/
.container {
    position: relative;
}
/*vlozenie bloku textu*/
.text-block {
    position: absolute;
    bottom: -50px;
    right: -80px;
    background-color: rgba(0,0,0,0.5);
    color: white;
    padding-left: 20px;
    padding-right: 20px;
    padding-top: 10px;
    text-align: right;
}

/*
div.gallery {
    margin: 5px;
    border: 1px solid #ccc;
    float: left;
    width: 180px;
}

div.gallery:hover {
    border: 1px solid #777;
}

div.gallery img {
    width: 100%;
    height: auto;
}

div.desc {
    padding: 15px;
    text-align: center;
}*/