/* Fullscreen layout to simulate book pages */
body {
    margin: 0;
    font-family: 'Georgia', serif;
    background: #fdfaf6;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
}

/* === Book Cover Styling === */
#cover-page {
    display: flex;
    justify-content: center;
    align-items: center;
    background: linear-gradient(to bottom right, #f9f6f0, #dcd2c8);
    font-family: 'Georgia', serif;
}

.cover-content {
    text-align: center;
    padding: 2rem;
    border: 2px solid #444;
    background: rgba(255, 255, 255, 0.95);
    box-shadow: 0 0 15px rgba(0,0,0,0.2);
    border-radius: 0.5rem;
}

.book-title {
    font-size: 2.5rem;
    font-weight: bold;
    margin-bottom: 1rem;
}

.book-subtitle {
    font-style: italic;
    margin-bottom: 2rem;
    font-size: 1.25rem;
}

.book-author {
    margin-bottom: 3rem;
    font-size: 1rem;
    font-weight: 500;
}

.open-book-btn {
    padding: 0.75em 1.5em;
    font-size: 1.1rem;
    background-color: #444;
    color: white;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    transition: background-color 0.3s ease;
}

    .open-book-btn:hover {
        background-color: #222;
    }

/* Book container */
.book-container {
    position: relative;
    width: 90%;
    max-width: 800px;
    height: 80vh;
    background: #f3f0e9;
    border-radius: 8px;
    box-shadow: 0 0 20px rgba(0,0,0,0.15);
    overflow: hidden;
    padding: 2em 1em;
}

/* Page layout */
.page {
    position: absolute;
    width: 100%;
    height: 100%;
    top: 0;
    left: 0;
    opacity: 0;
    transform: translateX(100%);
    transition: transform 0.6s ease, opacity 0.6s ease;
    z-index: 0;
    padding: 2rem;
    box-sizing: border-box;
}

    .page.active {
        opacity: 1;
        transform: translateX(0%);
        z-index: 1;
    }

/* Controls */
.pagination-controls {
    margin-top: 2rem;
}

button {
    padding: 0.6em 1.2em;
    font-size: 1rem;
    background-color: #333;
    color: #fff;
    border: none;
    margin: 0 1em;
    border-radius: 5px;
    cursor: pointer;
}

    button:disabled {
        background-color: #bbb;
        cursor: not-allowed;
    }


.toc-list {
    list-style: none;
    padding: 1rem 0;
}

    .toc-list li {
        margin: 0.75rem 0;
    }

    .toc-list button {
        font-size: 1.2rem;
        background: none;
        border: none;
        color: #2a2a2a;
        cursor: pointer;
        text-align: left;
        transition: color 0.3s;
    }

.toc-list button:hover {
            color: #007acc;
            text-decoration: underline;
        }

img {
    max-width: 2em;
    height: auto;
    display: block;
    margin: 1rem auto;
    border-radius: 5px;
    box-shadow: 0 0 10px rgba(0,0,0,0.5);
}