body {
    font-family: Arial, sans-serif;
    background-color: #f4f4f4;
    margin: 0;
    padding: 10px;
    box-sizing: border-box;
}

.container {
    max-width: 800px;
    margin: 0 auto;
    padding: 20px;
    background-color: #fff;
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
    border-radius: 8px;
}

h1 {
    text-align: center;
    font-size: 24px;
    font-weight: bold;
    margin-bottom: 20px;
}

.menu {
    list-style: none;
    padding: 0;
    margin: 0;
}

.menu > li {
    margin-bottom: 10px;
}

.menu a {
    text-decoration: none;
    color: #333;
    display: block;
    padding: 10px;
    border-radius: 4px;
    transition: background-color 0.3s;
}

.menu a:hover {
    background-color: #f0f0f0;
}

.dropdown-toggle {
    cursor: pointer;
    position: relative;
    text-decoration: none;
    color: #333;
}


.dropdown-menu {
    display: none;
    position: absolute;
    background-color: #f9f9f9;
    border: 1px solid #ccc;
    padding: 10px;
}

.dropdown-menu.show {
    display: block;
}

.expanded {
    height: auto;
}

.expanded >.dropdown-menu {
    position: static;
}


@media (max-width: 600px) {
    h1 {
        font-size: 20px;
    }

    .menu a {
        padding: 8px;
        font-size: 14px;
    }

    .dropdown-menu {
        padding-left: 15px;
    }
}

@media (min-width: 601px) and (max-width: 1024px) {
    h1 {
        font-size: 22px;
    }

    .menu a {
        padding: 9px;
        font-size: 16px;
    }

    .dropdown-menu {
        padding-left: 18px;
    }
}