nav {
    background-color: black;
    padding: 15px;
}

nav ul {
    list-style-type: none;
    display: flex;
    justify-content: center;
    gap: 20px;
    margin: 0;
    padding: 0;
}

nav li {
    font-size: 18px;
}

nav a {
    color: white;
    text-decoration: none;
    padding: 12px 18px;
    display: block;
}

nav a:hover {
    background-color: red;
    border-radius: 5px;
}

nav a.aktivna {
    background-color: red;
    color: white;
    font-weight: bold;
    border-radius: 5px;