*{
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

nav{
    position: absolute;
    top: 50px;
    left: 0;
    width: 100%;
    z-index: 1000;
    margin: 0;
    padding: 0;
    background-color: #333;
    color:white;
}

nav ul {
    margin: 0;
    padding: 0;
    list-style-type: none;
    justify-content: center;
    display: flex;
}

nav ul li{
    margin: 0;
    padding: 0;
}

nav ul li a{
    display: block;
    color: white;
    text-decoration: none;
    padding: 1em 2em;
}

nav ul li a:hover {
    background-color: gray;
}

nav ul li a.active{
    background-color: grey;
    color: #333;
    font-weight: bold;
}

.menu-hamburger{
    display: none;
}

@media (max-width: 1000px) {
    nav ul {
        display: none;
        flex-direction:column;
        }
    .menu-hamburger{
        display: block;
        background-color: #333;
        color: white;
        text-align: center;
        padding: 1em;
        cursor: pointer;
        }
    .menu-otvorit ul{
        display: flex;
    }
}