body {
    font-family: Arial, sans-serif;
    background-color: #f4f4f4;
    margin: 0;
    display: flex;
    flex-direction: column;
    height: 100vh;
}

header {
    background-color: #333;
    padding: 10px;
    display: flex;
    gap: 10px;
}

button {
    background-color: #555;
    color: white;
    border: none;
    padding: 8px 12px;
    cursor: pointer;
    border-radius: 4px;
}

button:hover {
    background-color: #777;
}

#notepad-text-area {
    flex-grow: 1;
    border: none;
    padding: 20px;
    font-size: 16px;
    resize: none;
    outline: none;
}