body {
    display: flex;
    flex-direction: column; /* Stack children vertically */
    align-items: center; /* Center children horizontally */
    font-family: 'Times New Roman', Times, serif;
}

header {
    width: 100%; /* Ensure header spans the full width */
    display: flex;
    justify-content: center; /* Center the header content */
    flex-wrap: wrap; /* Allow wrapping if the content is too wide */
}

select, button {
    margin: 10px;
    padding: 10px;
    font-size: 1em;
}

#exercise-container {
    margin-top: 20px;
    font-size: 1.5em;
    min-height: 50px;
    text-align: center;
}

#answer {
    display: none;
    margin-top: 1em;
    font-size: 1.5em;
    color: green;
    text-align: center;
}



#info h3 {
    font-family: Verdana, Geneva, Tahoma, sans-serif;
    font-size: 0.6em;
}

#chapters-dropdown-content {
    display: none;
    position: absolute;
    background-color: #f9f9f9;
    z-index: 1;
    padding: 1em;
}


.dropdown.active #chapters-dropdown-content {
    display: block;
}

#info li {
    text-align: left;
}

#info ol {
    list-style-type: decimal;
}

#info ul {
    list-style-type: disc;
}

#info p {
    font-family: Verdana, Geneva, Tahoma, sans-serif;
    font-size: 0.6em;
    font-size: 0.9em;
    color: #971e1e;
    margin-bottom: 0.5em;
}
#info h2 {
    margin-top: 1em;
    font-size: 1em;
    border-bottom: 2px solid #e0e0e0;
    padding-bottom: 0.2em;
}



#info ol li, #info ul li {
    margin: 0.5em;
    font-size: 1em;
    color: #555;
}