/* Navigácia */
nav {
    background: #34495e;
    min-width: 250px;
    position: relative;
}

.menu-toggle {
    display: none;
    background: none;
    border: none;
    color: white;
    font-size: 1.5rem;
    cursor: pointer;
    padding: 10px;
    width: 100%;
    text-align: left;
}

.nav-menu {
    list-style: none;
    padding: 1rem 0;
}

.nav-item {
    position: relative;
}

.nav-link {
    display: block;
    padding: 12px 20px;
    color: white;
    text-decoration: none;
    transition: all 0.3s ease;
    border-left: 3px solid transparent;
}

.nav-link:hover {
    background: #2c3e50;
    border-left-color: #3498db;
}

.dropdown-menu {
    list-style: none;
    background: #2c3e50;
    display: none;
    animation: slideDown 0.3s ease;
}

.dropdown.active > .dropdown-menu {
    display: block;
}

.dropdown-menu .dropdown-menu {
    background: #273747;
    margin-left: 10px;
}

.dropdown-menu .nav-link {
    padding-left: 30px;
}

.dropdown-menu .dropdown-menu .nav-link {
    padding-left: 45px;
}

/* Responzívny dizajn pre navigáciu */
@media (max-width: 768px) {
    .menu-toggle {
        display: block;
    }

    .nav-menu {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: #34495e;
        z-index: 1000;
        box-shadow: 0 5px 15px rgba(0,0,0,0.2);
    }

    .nav-menu.active {
        display: block;
        animation: slideDown 0.3s ease;
    }

    .nav-item {
        width: 100%;
    }

    .dropdown-menu {
        position: static;
        display: none;
        box-shadow: none;
        animation: none;
    }

    .dropdown.active > .dropdown-menu {
        display: block;
    }

    .dropdown-menu .dropdown-menu {
        margin-left: 20px;
    }
}

@keyframes slideDown {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}