body {
    font-family: Arial, sans-serif;
    text-align: center;
    margin: 50px;
}

#sentence-input {
    width: 300px;
    padding: 8px;
    font-size: 16px;
}

#check-btn {
    padding: 10px 20px;
    font-size: 16px;
    cursor: pointer;
}

#result {
    margin-top: 20px;
    font-size: 18px;
}

.valid-word {
    background-color: yellow;
    padding: 2px;
    border-radius: 3px;
}