body {
    font-family: sans-serif;
    background-color: #f4f4f4;
    color: #333;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    margin: 0;
}

.container {
    text-align: center;
    background-color: #fff;
    padding: 2rem;
    border-radius: 8px;
    box-shadow: 0 4px 8px rgba(0,0,0,0.1);
}

.sentence {
    font-size: 1.5rem;
    margin-bottom: 1.5rem;
}

button {
    background-color: #007bff;
    color: white;
    border: none;
    padding: 0.8rem 1.5rem;
    font-size: 1rem;
    cursor: pointer;
    border-radius: 4px;
    transition: background-color 0.3s;
}

button:hover {
    background-color: #0056b3;
}

.add-word-form {
    margin-top: 2rem;
    border-top: 1px solid #ddd;
    padding-top: 1.5rem;
}

.add-word-form h2 {
    margin-bottom: 1rem;
}

.add-word-form select,
.add-word-form input {
    padding: 0.5rem;
    font-size: 1rem;
    border: 1px solid #ccc;
    border-radius: 4px;
}

.add-word-form button {
    margin-left: 0.5rem;
}

.buttons {
    display: flex;
    justify-content: center;
    gap: 1rem;
    margin-bottom: 2rem;
}

#copy-button {
    background-color: #6c757d;
}

#copy-button:hover {
    background-color: #5a6268;
}