body {
    background-color: lightblue;
    background: linear-gradient(135deg, #1F9FFF, white 65%, #1F9FFF); /* pozadi s sikmym linearnim gradientem */
    margin: 0px;
    padding: 0px;
    font-family: Verdana, sans-serif;
    font-size: 1.0em;
    line-height: 1.5;
}

main {
    width: 1050px;
    margin: 2em auto;
    border: 1px solid gray;
    background-color: #ffffff;
    border-radius: 30px; /* zaoblene rohy */
    box-shadow: 0px 0px 20px gray; /* stin boxu */
}

header {
    padding: 20px;
    text-align: center;
    border-bottom: solid 1px gray;
}

nav {
    float: left;
    width: 160px;
    padding: 20px;
    margin: 0px;
    text-align: center;
}

section {
    margin-left: 200px; /* okraj praveho panelu je dan souctem sirky leveho panelu a jeho vnitrnich mezer */
    padding: 20px;
    border-left: solid 1px gray;
    text-align: justify;
}

footer {
    padding: 20px;
    text-align: center;
    border-top: solid 1px gray;
    clear: both; /* vypnuti obtekani leveho panelu s navigaci */
}

li {
    list-style-type: none;
    margin-left: -30px
}

img.hamburger, ul ul {
    display: none;
}