header {
    background: #1E1E1E;
    color: #fff;
    padding: 10px 20px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    border-bottom: 2px solid silver;
    flex-wrap: wrap;
    position: relative; 
    z-index: 1000; 
}

header h1 img {
    max-height: 50px;
}

nav {
    display: flex;
    
}

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

nav ul li {
    margin: 0 15px;
}

nav ul li a {
    color: silver;
    text-decoration: none;
    font-size: 1.1em;
    text-transform: uppercase;
    padding: 5px 10px;
    transition: color 0.3s, background-color 0.3s;
}

nav ul li a:hover {
    color: #fff;
    background-color: #333;
    border-radius: 5px;
}

.menu-icon, .dropdown-menu {
    display: none;
}


@media (max-width: 768px) {
    nav {
        display: none; 
    }

    .menu-icon {
        display: block;
        cursor: pointer;
        font-size: 2em;
        color: silver;
        z-index: 1001; 
    }

    .dropdown-menu {
        display: none;
        position: absolute; 
        top: 100%; 
        left: 0;
        background-color: #1E1E1E;
        width: 100%;
        z-index: 1000; 
        border-bottom: 2px solid silver;
    }

    .dropdown-menu ul {
        display: flex;
        flex-direction: column;
        margin: 0;
        padding: 0;
        list-style: none;
    }

    .dropdown-menu ul li {
        margin: 0;
        border-bottom: 1px solid #333;
    }

    .dropdown-menu ul li a {
        display: block;
        padding: 15px;
        color: silver;
        text-decoration: none;
        font-size: 1.2em;
        text-align: center;
    }

    .dropdown-menu ul li a:hover {
        background-color: #333;
    }
}