/* ===============================
   BOOK PAGE - PROFESSIONAL STYLE
================================ */

/* Banner */
.book-banner {
    background: #f3f4f6;
    padding: 90px 0 60px;
    text-align: center;
}

.book-banner h1 {
    font-size: 32px;
    font-weight: 700;
    color: #111827;
    margin-bottom: 15px;
}

.book-banner .subtitle {
    font-size: 16px;
    color: #4b5563;
}

/* Intro Section */
.book-intro {
    padding: 80px 0;
    background: #ffffff;
}

.book-intro h2 {
    font-size: 24px;
    font-weight: 700;
    margin-bottom: 25px;
    color: #111827;
}

.book-intro p {
    font-size: 15px;
    line-height: 1.9;
    color: #4b5563;
    margin-bottom: 18px;
}

/* Book Cover */
.book-cover {
    background: #ffffff;
    padding: 25px;
    border-radius: 8px;
    box-shadow: 0 15px 40px rgba(0, 0, 0, 0.05);
}

.book-cover img {
    width: 100%;
    max-width: 280px;
    border-radius: 6px;
    margin-bottom: 20px;
}

/* Download Button */
.download-btn {
    display: inline-block;
    padding: 10px 26px;
    background: #111827;
    color: #fff;
    font-size: 14px;
    font-weight: 600;
    border-radius: 4px;
    text-decoration: none;
    transition: all 0.3s ease;
}

.download-btn:hover {
    background: #1f2937;
    color: #fff;
}

/* Preview Section */
.book-preview {
    background: #f9fafb;
    padding: 80px 0;
}

.book-preview .section-title {
    font-size: 22px;
    font-weight: 600;
    margin-bottom: 40px;
}

.preview-box {
    background: #ffffff;
    border: 1px solid #e5e7eb;
    border-radius: 8px;
    padding: 40px;
    text-align: center;
    color: #6b7280;
    font-size: 15px;
}

/* Responsive */
@media (max-width: 992px) {
    .book-intro {
        text-align: center;
    }

    .book-intro p {
        text-align: left;
    }

    .book-cover {
        margin-top: 40px;
    }
}