/*
 * Book Detail Page Styles
 * Imperial Restitution Press
 */

/* ═══════════════════════════════════════════════════════════════
   BOOK HERO
   ═══════════════════════════════════════════════════════════════ */

.book-hero {
    padding: calc(var(--space-5xl) + 80px) 0 var(--space-5xl);
    position: relative;
    overflow: hidden;
}

.book-hero-bg {
    position: absolute;
    inset: 0;
    background:
        radial-gradient(ellipse at 30% 20%, rgba(201, 162, 39, 0.05) 0%, transparent 50%),
        linear-gradient(180deg, var(--obsidian) 0%, var(--obsidian-light) 100%);
}

.book-hero-grid {
    display: grid;
    grid-template-columns: 400px 1fr;
    gap: var(--space-4xl);
    align-items: start;
    position: relative;
}

/* Book Cover 3D Effect */
.book-hero-cover {
    position: sticky;
    top: 120px;
}

.book-cover-3d {
    position: relative;
    perspective: 1000px;
    transform-style: preserve-3d;
}

.book-cover-front {
    position: relative;
    transform: rotateY(-15deg);
    transform-origin: left center;
    box-shadow:
        10px 10px 30px rgba(0, 0, 0, 0.4),
        2px 2px 10px rgba(0, 0, 0, 0.3);
    transition: transform var(--duration-slow) var(--ease-out);
}

.book-cover-3d:hover .book-cover-front {
    transform: rotateY(-5deg);
}

.book-cover-front img {
    display: block;
    width: 100%;
    height: auto;
}

.book-cover-spine {
    position: absolute;
    top: 0;
    left: 0;
    width: 30px;
    height: 100%;
    background: linear-gradient(90deg, #1a1a1a 0%, #2a2a2a 50%, #1a1a1a 100%);
    transform: rotateY(90deg) translateX(-15px);
    transform-origin: left center;
}

.book-cover-shadow {
    position: absolute;
    bottom: -20px;
    left: 20px;
    right: 20px;
    height: 40px;
    background: radial-gradient(ellipse at center, rgba(0, 0, 0, 0.4) 0%, transparent 70%);
    filter: blur(10px);
}

/* Book Content */
.book-hero-content {
    padding-top: var(--space-xl);
}

.book-category-tag {
    display: inline-block;
    font-family: var(--font-display);
    font-size: var(--text-xs);
    font-weight: 500;
    letter-spacing: 0.2em;
    text-transform: uppercase;
    color: var(--gold);
    padding: var(--space-xs) var(--space-md);
    border: 1px solid var(--gold-muted);
    margin-bottom: var(--space-lg);
}

.book-hero-title {
    font-family: var(--font-display);
    font-size: var(--text-5xl);
    font-weight: 500;
    letter-spacing: 0.03em;
    color: var(--ivory);
    line-height: 1.1;
    margin-bottom: var(--space-sm);
}

.book-hero-subtitle {
    font-family: var(--font-heading);
    font-size: var(--text-2xl);
    font-weight: 300;
    font-style: italic;
    color: var(--parchment);
    margin-bottom: var(--space-lg);
}

.book-hero-author {
    font-family: var(--font-body);
    font-size: var(--text-base);
    color: var(--sand);
    margin-bottom: var(--space-2xl);
}

.book-hero-author strong {
    color: var(--ivory);
    font-weight: 500;
}

.author-separator {
    margin: 0 var(--space-sm);
    color: var(--pewter);
}

/* Meta Information */
.book-hero-meta {
    display: flex;
    gap: var(--space-2xl);
    padding: var(--space-lg) 0;
    border-top: 1px solid var(--charcoal);
    border-bottom: 1px solid var(--charcoal);
    margin-bottom: var(--space-2xl);
}

.meta-item {
    display: flex;
    flex-direction: column;
    gap: var(--space-xs);
}

.meta-label {
    font-size: var(--text-xs);
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--pewter);
}

.meta-value {
    font-family: var(--font-display);
    font-size: var(--text-lg);
    color: var(--ivory);
}

.meta-value.rating {
    color: var(--gold);
    letter-spacing: 2px;
}

/* Pricing */
.book-hero-pricing {
    display: flex;
    align-items: flex-start;
    gap: var(--space-3xl);
}

.pricing-direct {
    flex: 1;
}

.price-label {
    display: block;
    font-size: var(--text-xs);
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--pewter);
    margin-bottom: var(--space-sm);
}

.price-row {
    display: flex;
    align-items: baseline;
    gap: var(--space-md);
    margin-bottom: var(--space-xs);
}

.price-current {
    font-family: var(--font-display);
    font-size: var(--text-4xl);
    font-weight: 600;
    color: var(--ivory);
}

.price-original {
    font-size: var(--text-lg);
    color: var(--pewter);
    text-decoration: line-through;
}

.price-badge {
    font-family: var(--font-display);
    font-size: var(--text-xs);
    font-weight: 500;
    letter-spacing: 0.1em;
    color: var(--obsidian);
    background: var(--gold);
    padding: var(--space-xs) var(--space-sm);
}

.price-bonus {
    font-size: var(--text-sm);
    font-style: italic;
    color: var(--gold-muted);
}

.pricing-actions {
    display: flex;
    flex-direction: column;
    gap: var(--space-lg);
}

.btn-purchase {
    display: inline-flex;
    align-items: center;
    gap: var(--space-md);
    font-family: var(--font-display);
    font-size: var(--text-sm);
    font-weight: 500;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    color: var(--obsidian);
    background: var(--gold);
    padding: var(--space-lg) var(--space-2xl);
    border: none;
    cursor: pointer;
    transition: all var(--duration-fast) var(--ease-out);
}

.btn-purchase:hover {
    background: var(--gold-light);
    transform: translateY(-2px);
    box-shadow: 0 4px 20px rgba(201, 162, 39, 0.3);
}

.btn-purchase svg {
    width: 18px;
    height: 18px;
}

.btn-purchase-lg {
    font-size: var(--text-base);
    padding: var(--space-lg) var(--space-3xl);
}

.alt-purchase {
    font-size: var(--text-sm);
    color: var(--pewter);
}

.alt-link {
    color: var(--sand);
    border-bottom: 1px solid transparent;
    margin-left: var(--space-sm);
    transition: all var(--duration-fast) var(--ease-out);
}

.alt-link:hover {
    color: var(--ivory);
    border-bottom-color: var(--gold-muted);
}

/* ═══════════════════════════════════════════════════════════════
   BOOK DESCRIPTION
   ═══════════════════════════════════════════════════════════════ */

.book-description {
    padding: var(--space-5xl) 0;
    background: var(--obsidian);
}

.section-title-sm {
    font-family: var(--font-display);
    font-size: var(--text-sm);
    font-weight: 500;
    letter-spacing: 0.3em;
    text-transform: uppercase;
    color: var(--gold);
    margin-bottom: var(--space-2xl);
}

.description-grid {
    display: grid;
    grid-template-columns: 1fr 380px;
    gap: var(--space-4xl);
}

.description-text {
    font-size: var(--text-lg);
    color: var(--sand);
    line-height: 1.8;
}

.description-text .lead {
    font-family: var(--font-heading);
    font-size: var(--text-2xl);
    font-weight: 400;
    color: var(--parchment);
    margin-bottom: var(--space-xl);
}

.description-text p {
    margin-bottom: var(--space-lg);
}

.description-quote {
    margin: var(--space-2xl) 0;
    padding: var(--space-xl);
    background: rgba(201, 162, 39, 0.03);
    border-left: 2px solid var(--gold-muted);
}

.description-quote p {
    font-family: var(--font-heading);
    font-size: var(--text-xl);
    font-style: italic;
    color: var(--parchment);
    margin-bottom: var(--space-md);
}

.description-quote cite {
    font-family: var(--font-display);
    font-size: var(--text-sm);
    font-style: normal;
    letter-spacing: 0.1em;
    color: var(--gold);
}

/* Sidebar */
.description-sidebar {
    display: flex;
    flex-direction: column;
    gap: var(--space-2xl);
}

.sidebar-card {
    padding: var(--space-xl);
    background: var(--obsidian-lighter);
    border: 1px solid var(--charcoal);
}

.sidebar-title {
    font-family: var(--font-display);
    font-size: var(--text-sm);
    font-weight: 500;
    letter-spacing: 0.2em;
    text-transform: uppercase;
    color: var(--gold-muted);
    margin-bottom: var(--space-lg);
    padding-bottom: var(--space-md);
    border-bottom: 1px solid var(--charcoal);
}

.feature-list {
    list-style: none;
}

.feature-list li {
    display: flex;
    align-items: flex-start;
    gap: var(--space-md);
    padding: var(--space-md) 0;
    border-bottom: 1px solid rgba(61, 61, 61, 0.5);
}

.feature-list li:last-child {
    border-bottom: none;
}

.feature-icon {
    font-family: var(--font-display);
    font-size: var(--text-sm);
    color: var(--gold);
    width: 24px;
    flex-shrink: 0;
}

.feature-list span:last-child {
    font-size: var(--text-sm);
    color: var(--sand);
    line-height: 1.5;
}

.audience-tags {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-sm);
}

.audience-tag {
    font-size: var(--text-xs);
    color: var(--parchment);
    padding: var(--space-xs) var(--space-md);
    border: 1px solid var(--charcoal);
    transition: all var(--duration-fast) var(--ease-out);
}

.audience-tag:hover {
    border-color: var(--gold-muted);
    color: var(--ivory);
}

/* ═══════════════════════════════════════════════════════════════
   TABLE OF CONTENTS
   ═══════════════════════════════════════════════════════════════ */

.book-toc {
    padding: var(--space-5xl) 0;
    background: var(--obsidian-light);
}

.toc-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-lg);
}

.toc-chapter {
    display: flex;
    gap: var(--space-lg);
    padding: var(--space-lg);
    background: var(--obsidian);
    border: 1px solid var(--charcoal);
    transition: all var(--duration-normal) var(--ease-out);
}

.toc-chapter:hover {
    border-color: var(--gold-muted);
    transform: translateX(4px);
}

.chapter-number {
    font-family: var(--font-display);
    font-size: var(--text-2xl);
    font-weight: 400;
    color: var(--gold);
    width: 40px;
    flex-shrink: 0;
}

.chapter-content h4 {
    font-family: var(--font-heading);
    font-size: var(--text-lg);
    font-weight: 500;
    color: var(--ivory);
    margin-bottom: var(--space-xs);
}

.chapter-content p {
    font-size: var(--text-sm);
    color: var(--pewter);
}

/* ═══════════════════════════════════════════════════════════════
   CALL TO ACTION
   ═══════════════════════════════════════════════════════════════ */

.book-cta {
    padding: var(--space-5xl) 0;
    background: var(--obsidian);
    border-top: 1px solid var(--charcoal);
}

.cta-inner {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: var(--space-4xl);
    max-width: 1000px;
    margin: 0 auto;
}

.cta-title {
    font-family: var(--font-display);
    font-size: var(--text-3xl);
    font-weight: 400;
    letter-spacing: 0.03em;
    color: var(--ivory);
    margin-bottom: var(--space-md);
}

.cta-text {
    font-size: var(--text-lg);
    color: var(--sand);
    max-width: 500px;
}

.cta-action {
    display: flex;
    flex-direction: column;
    align-items: flex-end;
    gap: var(--space-lg);
}

.cta-price {
    text-align: right;
}

.cta-price-label {
    display: block;
    font-size: var(--text-xs);
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--pewter);
}

.cta-price-value {
    font-family: var(--font-display);
    font-size: var(--text-3xl);
    font-weight: 600;
    color: var(--gold);
}

/* ═══════════════════════════════════════════════════════════════
   RELATED BOOKS
   ═══════════════════════════════════════════════════════════════ */

.related-books {
    padding: var(--space-5xl) 0;
    background: var(--obsidian-light);
}

.related-books .section-title-sm {
    text-align: center;
    margin-bottom: var(--space-3xl);
}

.related-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-xl);
}

.related-card {
    display: flex;
    flex-direction: column;
    background: var(--obsidian);
    border: 1px solid var(--charcoal);
    overflow: hidden;
    transition: all var(--duration-normal) var(--ease-out);
}

.related-card:hover {
    border-color: var(--gold-muted);
    transform: translateY(-8px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.4);
}

.related-cover {
    position: relative;
    overflow: hidden;
    background: var(--obsidian);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--space-lg);
}

.related-cover img {
    width: 100%;
    height: auto;
    max-height: 280px;
    object-fit: contain;
    transition: transform var(--duration-slow) var(--ease-out);
}

.related-card:hover .related-cover img {
    transform: scale(1.05);
}

.related-cover::after {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(180deg, transparent 50%, rgba(10, 10, 10, 0.9) 100%);
    opacity: 0;
    transition: opacity var(--duration-normal) var(--ease-out);
}

.related-card:hover .related-cover::after {
    opacity: 1;
}

.related-info {
    padding: var(--space-lg);
    text-align: center;
}

.related-info h4 {
    font-family: var(--font-display);
    font-size: var(--text-lg);
    font-weight: 500;
    letter-spacing: 0.03em;
    color: var(--ivory);
    margin-bottom: var(--space-xs);
    transition: color var(--duration-fast) var(--ease-out);
}

.related-card:hover .related-info h4 {
    color: var(--gold);
}

.related-info p {
    font-family: var(--font-body);
    font-size: var(--text-sm);
    color: var(--pewter);
    font-style: italic;
}

/* ═══════════════════════════════════════════════════════════════
   MODAL
   ═══════════════════════════════════════════════════════════════ */

.modal {
    position: fixed;
    inset: 0;
    z-index: 2000;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    transition: all var(--duration-normal) var(--ease-out);
}

.modal.active {
    opacity: 1;
    visibility: visible;
}

.modal-backdrop {
    position: absolute;
    inset: 0;
    background: rgba(0, 0, 0, 0.8);
    backdrop-filter: blur(4px);
}

.modal-content {
    position: relative;
    width: 90%;
    max-width: 500px;
    background: var(--obsidian-lighter);
    border: 1px solid var(--charcoal);
    padding: var(--space-2xl);
    transform: translateY(20px);
    transition: transform var(--duration-normal) var(--ease-out);
}

.modal.active .modal-content {
    transform: translateY(0);
}

.modal-close {
    position: absolute;
    top: var(--space-lg);
    right: var(--space-lg);
    font-size: var(--text-2xl);
    color: var(--pewter);
    background: none;
    border: none;
    cursor: pointer;
    transition: color var(--duration-fast);
}

.modal-close:hover {
    color: var(--ivory);
}

.modal-title {
    font-family: var(--font-display);
    font-size: var(--text-2xl);
    font-weight: 500;
    color: var(--ivory);
    margin-bottom: var(--space-sm);
}

.modal-text {
    font-size: var(--text-base);
    color: var(--sand);
    margin-bottom: var(--space-xl);
}

.modal-options {
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
}

.modal-option {
    display: grid;
    grid-template-columns: 1fr auto;
    grid-template-rows: auto auto;
    gap: var(--space-xs) var(--space-lg);
    padding: var(--space-lg);
    background: var(--obsidian);
    border: 1px solid var(--charcoal);
    transition: all var(--duration-fast) var(--ease-out);
}

.modal-option:hover {
    border-color: var(--gold-muted);
    background: rgba(201, 162, 39, 0.03);
}

.option-name {
    font-family: var(--font-display);
    font-size: var(--text-base);
    font-weight: 500;
    color: var(--ivory);
}

.option-price {
    font-family: var(--font-display);
    font-size: var(--text-xl);
    font-weight: 600;
    color: var(--gold);
    text-align: right;
}

.option-note {
    grid-column: 1 / -1;
    font-size: var(--text-sm);
    color: var(--pewter);
}

/* ═══════════════════════════════════════════════════════════════
   RESPONSIVE
   ═══════════════════════════════════════════════════════════════ */

@media (max-width: 1100px) {
    .book-hero-grid {
        grid-template-columns: 320px 1fr;
        gap: var(--space-3xl);
    }

    .book-hero-title {
        font-size: var(--text-4xl);
    }
}

@media (max-width: 900px) {
    .book-hero-grid {
        grid-template-columns: 1fr;
        max-width: 600px;
    }

    .book-hero-cover {
        position: relative;
        top: 0;
        max-width: 300px;
        margin: 0 auto;
    }

    .description-grid {
        grid-template-columns: 1fr;
    }

    .toc-grid {
        grid-template-columns: 1fr;
    }

    .cta-inner {
        flex-direction: column;
        text-align: center;
    }

    .cta-action {
        align-items: center;
    }

    .related-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: var(--space-lg);
    }
}

@media (max-width: 500px) {
    .related-grid {
        grid-template-columns: 1fr;
        max-width: 280px;
        margin: 0 auto;
    }
}

@media (max-width: 600px) {
    .book-hero-pricing {
        flex-direction: column;
        gap: var(--space-xl);
    }

    .book-hero-meta {
        flex-wrap: wrap;
        gap: var(--space-lg);
    }

    .price-current {
        font-size: var(--text-3xl);
    }
}