body {
    font-family: Arial, sans-serif;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    margin: 0;
    background-color: #f0f2f5;
    overflow: hidden;
}

.book-container {
    display: flex;
    gap: 20px;
    perspective: 1000px;
}

.page {
    width: 300px;
    height: 400px;
    background-color: #ffffff;
    border-radius: 15px;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    padding: 20px;
}

.left-page {
    transform: rotateY(-5deg);
    background-color: #fcfcfc;
}

.right-page {
    transform: rotateY(5deg);
}

#character-display {
    font-size: 150px;
    margin: 0;
}

#name-display {
    font-size: 40px;
    color: #555;
}

.recording-controls {
    margin-top: 30px;
    text-align: center;
}

.recording-controls h3 {
    margin-bottom: 15px;
    color: #333;
}

.buttons {
    margin-top: 30px;
    display: flex;
    gap: 15px;
}

button {
    padding: 10px 20px;
    font-size: 16px;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    transition: background-color 0.3s;
}

#speak-button {
    background-color: #28a745;
    color: white;
}

#next-button {
    background-color: #ffc107;
    color: white;
}

#record-button, #stop-button, #play-button {
    padding: 8px 16px;
    font-size: 14px;
    margin: 5px;
}

#record-button { background-color: #dc3545; color: white; }
#stop-button { background-color: #6c757d; color: white; }
#play-button { background-color: #007BFF; color: white; }

button:hover:not(:disabled) {
    filter: brightness(90%);
}

button:disabled {
    cursor: not-allowed;
    opacity: 0.5;
}

/* --- New Keyboard Styles --- */
.keyboard-container {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 10px;
    margin-top: 20px;
    width: 620px; /* Adjust to match the width of the two pages */
}

.key {
    width: 100px;
    height: 60px;
    font-size: 30px;
    background-color: #fff;
    border: 1px solid #ccc;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
    transition: transform 0.1s, box-shadow 0.1s;
}

.key:hover {
    background-color: #e9e9e9;
    transform: translateY(-2px);
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.15);
}

.key:active {
    transform: translateY(0);
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}