body {
    font-family: sans-serif;
    margin: 0;
    background-color: #f4f4f4;
    color: #333;
}

header {
    background-color: #3498db;
    color: white;
    padding: 1rem;
    text-align: center;
}

.nav {
    margin-top: 1rem;
}

.nav button {
    background-color: #2980b9;
    color: white;
    border: none;
    padding: 0.5rem 1rem;
    margin: 0 0.5rem;
    border-radius: 5px;
    cursor: pointer;
}

main {
    padding: 1rem;
}

#wordList {
    list-style: none;
    padding: 0;
}

#wordList li {
    background-color: white;
    padding: 1rem;
    margin-bottom: 0.5rem;
    border-radius: 5px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

#flashcardContainer {
    background-color: white;
    padding: 2rem;
    margin-top: 2rem;
    border-radius: 10px;
    box-shadow: 0 4px 8px rgba(0,0,0,0.1);
    text-align: center;
}

#flashcardWord {
    font-size: 2rem;
    margin-bottom: 1rem;
}

#flashcardMeaning {
    font-size: 1.2rem;
    color: #555;
    margin-bottom: 2rem;
}