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

.container {
    width: 90%;
    max-width: 600px;
    background: white;
    padding: 20px;
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
    border-radius: 8px;
    text-align: center;
}

.editable-text {
    border: 1px solid #ddd;
    border-radius: 4px;
    padding: 10px;
    min-height: 100px;
    background-color: white;
    margin: 10px 0;
    overflow-y: auto;
}

.editable-text[placeholder]:empty:before {
    content: attr(placeholder);
    color: grey;
}

button {
    padding: 10px 20px;
    background-color: #007bff;
    color: white;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    transition: background-color 0.3s ease;
}

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

#result, .common-words {
    margin-top: 20px;
    padding: 10px;
    background-color: #e9ecef;
    border-radius: 4px;
}

.highlight {
    background-color: yellow;
}