html,
body {
    background-color: #142B3D;
}
.main {
    margin: auto;
    height: 3437px;
    width: 1220px;
    background: url(../src/20_21/bg.jpg) no-repeat center;
    align-content: center;
    color: white;
    font-weight: bold;
    font-family: sans-serif, arial;
    font-size: 15px;
    text-align: center;
}
.header {
    padding-top: 80px;
    margin-left: auto;
    margin-right: auto;
    font-size: 25px;
    text-align: center;
    line-height: 55px;
    color: white;
}
.podnadpis {
    padding-top: 20px;
    color: rgb(255, 128, 0);
    line-height: 2pt;
    letter-spacing: 1.5pt;
    font-weight: normal;
}
.podnadpis h2 {
    font-size: 35px;
    word-spacing: 2pt;
    text-transform: uppercase;
    letter-spacing: 2pt;
    font-weight: bold;
    color: white;
}
.kapitola {
    font-family: sans-serif, arial;
    font-size: 20px;
    color: white;    
    font-weight: normal;
}
.text {
    color: white;
    font-size: 21px;
    font-family: "Arial", arial, sans-serif;
}
.napis {
    font-weight: bold;
    color: #FFFFFF;
    letter-spacing: 1pt;
    word-spacing: 2pt;
    font-size: 34px;
    text-align: center;
    font-family: arial, helvetica, sans-serif;
    line-height: 1;
    color: white;
}
.mysl {
    font-weight: normal;
    color: #FFFFFF;
    letter-spacing: 1pt;
    word-spacing: 2pt;
    font-size: 32px;
    color: white;
    text-align: center;
    font-family: arial, helvetica, sans-serif;
    line-height: 1;
}
.pdf img {
    position: relative;
    top: -2620px;
    left: 400px;
    width: 200px;
    height: auto;
}
.pdf img:hover {
    filter: invert(1);
}
.pdf2 img {
    position: relative;
    top: -1570px;
    left: 350px;
    width: 150px;
    height: auto;
}
.pdf2 img:hover {
    filter: invert(1);
}

.pecet img {
    position: relative;
    width: 100px;
    height: auto;
    top: -2734px;
    left: -500px;
}
.gall img {
    position: relative;
    width: 1200px;
    height: 250px;
    top: -2370px;
    left: 0px;
    opacity: 0;
}
.gall2 img {
    position: relative;
    width: 890px;
    height: 270px;
    top: -630px;
    left: 0px;
    opacity: 0;
}