body {
    font-family: Arial, sans-serif;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    margin: 0;
    background-color: #f0f0f0;
}

.container {
    text-align: center;
    background-color: #ffffff;
    padding: 20px;
    border-radius: 10px;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.1);
}

.hiragana {
    font-size: 5rem;
}

.buttons button {
    font-size: 1.5rem;
    margin: 10px;
    padding: 10px 20px;
    border: none;
    border-radius: 5px;
    background-color: #007BFF;
    color: white;
    cursor: pointer;
    -webkit-user-select: none;  /* Safari */
    -moz-user-select: none;     /* Firefox */
    -ms-user-select: none;      /* IE/Edge */
    user-select: none;  
}

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

.romaji {
    font-size: 2rem;
    margin-bottom: 20px;
    color: #333;
}