body {
    font-family: Arial, sans-serif;
    margin: 0;
    padding: 0;
    background-color: #f4f4f9;
    color: #222;
}

header {
    padding: 20px;
    text-align: center;
    background-color: #e8eaf6;
    border-bottom: 2px solid #888;
}

header h1 {
    margin: 0;
    font-size: 28px;
    font-weight: 600;
}

header h2 {
    margin: 6px 0 0 0;
    font-size: 16px;
    font-weight: 400;
    color: #555;
}

.content-wrapper {
    display: flex;
    gap: 20px;
    padding: 20px;
    align-items: stretch;
}

nav {
    background-color: #fff;
    padding: 10px 20px;
    border: 1px solid #ccc;
    border-radius: 6px;
    box-shadow: 1px 1px 6px rgba(0,0,0,0.05);
}

nav ul {
    list-style: none;
    padding: 0;
    margin: 0;
    display: flex;
    flex-direction: row;
    gap: 20px;
    align-items: center;
}

nav ul li a {
    display: block;
    padding: 8px 12px;
    text-decoration: none;
    color: #333;
    border-radius: 4px;
    text-align: center;
    transition: background-color 0.2s, transform 0.1s;
}

nav ul li a:hover {
    background-color: #d0d0f0;
    transform: translateY(-2px);
}

.paragraph-container {
    flex: 1;
    background-color: #fff;
    border: 1px solid #ccc;
    padding: 20px;
    min-height: 500px;
    border-radius: 6px;
    box-shadow: 0 1px 4px rgba(0,0,0,0.05);
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.book {
    border-radius: 6px;
    padding: 12px;
    border: 1px solid #eee;
}

.book h2 {
    margin: 0 0 4px 0;
    font-size: 18px;
    font-weight: 500;
}

.book p {
    margin: 0;
    font-size: 14px;
    color: #555;
}

.sidebar {
    width: 220px;
    background-color: #fff;
    padding: 15px;
    border: 1px solid #ccc;
    border-radius: 6px;
    box-shadow: 1px 1px 6px rgba(0,0,0,0.05);
    display: flex;
    flex-direction: column;
}

.sidebar h3 {
    margin-top: 0;
    font-size: 16px;
    color: #222;
}

.sidebar ul {
    list-style: none;
    padding: 0;
    margin: 0;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.sidebar a {
    text-decoration: none;
    color: #222;
    transition: color 0.2s;
}

.sidebar a:hover {
    text-decoration: underline;
    color: #4a4aff;
}

footer {
    border-top: 1px solid #ccc;
    padding: 12px;
    text-align: center;
    background-color: #f2f2f2;
    margin-top: 20px;
    font-size: 14px;
}