ul {
    list-style: none;
    margin: 0;
    padding: 0;
}

a {
    text-decoration: none; 
    color: #333;
    display: block;
    padding: 10px 15px;
    transition: background-color 0.3s;
}

.hlavni-navigace {
    background-color: #376c36; 
}

.prvni > li {
    position: relative; 
}
.prvni > li > a {
    color: white;
    font-weight: bold;
}
.prvni > li > a:hover {
    background-color: #36be66;
}

.druhy {
    display: none; 
    background-color: #ecf0f1;
}
.druhy a:hover {
    background-color: #bdc3c7;
}

#menu-toggle {
    display: none;
}

.menu-icon {
    display: block;
    font-size: 30px;
    padding: 10px 15px;
    cursor: pointer;
    text-align: right;
    color: white;
    user-select: none;
}

.prvni {
    display: none;
    width: 100%;
}

#menu-toggle:checked ~ .prvni {
    display: block;
}

#menu-toggle:checked ~ .prvni .druhy {
    display: block;
    position: static; 
}

#menu-toggle:checked + .menu-icon {
    font-size: 0; 
}
#menu-toggle:checked + .menu-icon::before {
    content: "\2716"; 
    font-size: 30px; 
}

@media (min-width: 768px) {
    .menu-icon, #menu-toggle {
        display: none; 
    }
    
    .prvni {
        display: flex !important; 
        width: auto;
    }

    .prvni > li:hover > .druhy {
        display: block;
        
        position: absolute; 
        top: 100%;       
        left: 0;         
        min-width: 200px; 
        
        border: 1px solid #ccc;
        z-index: 1000; 
    }
    
    .druhy {
        display: none; 
    }
}