@import url('https://fonts.googleapis.com/css2?family=Cormorant+Garamond:ital,wght@0,300;0,400;0,500;0,600;0,700;1,400&family=Inter:wght@300;400;500;600;700&display=swap');

:root {
    /* Color Palette */
    --color-bg: #fdfbf7;           /* Warm paper background */
    --color-bg-alt: #f5f0e6;       /* Slightly darker paper */
    --color-text: #1a1e1b;         /* Charcoal ink */
    --color-text-muted: #5e6560;   /* Muted grey */
    --color-accent: #a94a2b;       /* Terracotta clay */
    --color-accent-hover: #89371d;  /* Darker terracotta */
    --color-accent-green: #233e33; /* Forest green */
    --color-border: #e6dfd5;       /* Paper-colored borders */
    --color-card-bg: #ffffff;
    --color-shadow: rgba(43, 39, 35, 0.06);
    --color-shadow-hover: rgba(43, 39, 35, 0.12);
    
    /* Fonts */
    --font-serif: 'Cormorant Garamond', 'Georgia', serif;
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    
    /* Layout */
    --max-width: 1200px;
    --transition-smooth: all 0.35s cubic-bezier(0.25, 0.8, 0.25, 1);
}

/* Reset & Base Styles */
* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html, body {
    overflow-x: hidden;
    width: 100%;
    overflow-wrap: break-word;
}

body {
    background-color: var(--color-bg);
    color: var(--color-text);
    font-family: var(--font-sans);
    font-size: 16px;
    line-height: 1.6;
}

a {
    color: inherit;
    text-decoration: none;
    transition: var(--transition-smooth);
}

button {
    font-family: var(--font-sans);
    cursor: pointer;
    border: none;
    background: none;
    transition: var(--transition-smooth);
}

/* Container */
.container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 2rem;
}

/* Header & Navigation */
header {
    border-bottom: 1px solid var(--color-border);
    background-color: rgba(253, 251, 247, 0.85);
    backdrop-filter: blur(10px);
    position: sticky;
    top: 0;
    z-index: 100;
    transition: var(--transition-smooth);
}

.nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 90px;
}

.logo-link {
    display: flex;
    align-items: center;
    gap: 12px;
}

.logo-img {
    height: 50px;
    width: auto;
    object-fit: contain;
}

.logo-text-img {
    height: 25px;
    width: auto;
    object-fit: contain;
    display: none; /* fallback display if needed */
}

.logo-title {
    font-family: var(--font-serif);
    font-weight: 700;
    font-size: 1.8rem;
    letter-spacing: 0.05em;
    color: var(--color-text);
}

.logo-title span {
    font-size: 0.8rem;
    display: block;
    font-family: var(--font-sans);
    font-weight: 500;
    letter-spacing: 0.2em;
    color: var(--color-accent);
    margin-top: -4px;
}

nav ul {
    display: flex;
    list-style: none;
    gap: 2.5rem;
}

nav a {
    font-size: 0.95rem;
    font-weight: 500;
    letter-spacing: 0.05em;
    text-transform: uppercase;
    position: relative;
    padding: 5px 0;
}

nav a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 1px;
    background-color: var(--color-accent);
    transition: var(--transition-smooth);
}

nav a:hover, nav a.active {
    color: var(--color-accent);
}

nav a:hover::after, nav a.active::after {
    width: 100%;
}

.nav-actions {
    display: flex;
    align-items: center;
    gap: 1.5rem;
}

.cart-btn {
    position: relative;
    padding: 8px;
    border-radius: 50%;
    background-color: var(--color-bg-alt);
    color: var(--color-text);
}

.cart-btn:hover {
    background-color: var(--color-accent);
    color: white;
}

.cart-count {
    position: absolute;
    top: -4px;
    right: -4px;
    background-color: var(--color-accent);
    color: white;
    font-size: 0.75rem;
    font-weight: 700;
    width: 18px;
    height: 18px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

/* Page Sections (SPA container) */
.page-section {
    display: none;
    min-height: calc(100vh - 170px);
    animation: fadeIn 0.6s cubic-bezier(0.16, 1, 0.3, 1) forwards;
    padding: 4rem 0;
}

.page-section.active {
    display: block;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(15px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Home Page */
.hero-section {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
    margin-bottom: 5rem;
}

.hero-content h1 {
    font-family: var(--font-serif);
    font-size: 3.5rem;
    line-height: 1.1;
    margin-bottom: 1.5rem;
    font-weight: 700;
}

.hero-content .subtitle {
    font-size: 1.1rem;
    color: var(--color-accent);
    font-weight: 600;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    margin-bottom: 1rem;
}

.hero-content p {
    font-size: 1.1rem;
    color: var(--color-text-muted);
    margin-bottom: 2rem;
    max-width: 500px;
}

.hero-cta {
    display: flex;
    gap: 1.5rem;
}

.btn {
    display: inline-block;
    padding: 0.9rem 2rem;
    font-size: 0.9rem;
    font-weight: 600;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    border-radius: 4px;
    text-align: center;
}

.btn-primary {
    background-color: var(--color-accent-green);
    color: white;
}

.btn-primary:hover {
    background-color: var(--color-accent);
    box-shadow: 0 4px 12px rgba(169, 74, 43, 0.15);
    transform: translateY(-2px);
}

.btn-secondary {
    border: 1px solid var(--color-border);
    color: var(--color-text);
}

.btn-secondary:hover {
    background-color: var(--color-bg-alt);
    border-color: var(--color-text);
    transform: translateY(-2px);
}

.hero-visual {
    display: flex;
    justify-content: center;
    position: relative;
}

.hero-logo-frame {
    width: 380px;
    height: 380px;
    border: 1px solid var(--color-border);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: var(--color-bg-alt);
    box-shadow: inset 0 0 20px rgba(0,0,0,0.02);
    position: relative;
    animation: rotateSlow 20s linear infinite;
}

.hero-logo-frame img {
    width: 65%;
    height: auto;
    object-fit: contain;
    animation: counterRotateSlow 20s linear infinite;
}

@keyframes rotateSlow {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

@keyframes counterRotateSlow {
    from { transform: rotate(360deg); }
    to { transform: rotate(0deg); }
}

/* Featured Publications */
.featured-header {
    text-align: center;
    margin-bottom: 3.5rem;
}

.featured-header h2 {
    font-family: var(--font-serif);
    font-size: 2.6rem;
    margin-bottom: 0.5rem;
}

.featured-header p {
    color: var(--color-accent);
    text-transform: uppercase;
    font-size: 0.85rem;
    font-weight: 600;
    letter-spacing: 0.2em;
}

.books-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 3rem;
}

/* Book Card */
.book-card {
    background-color: var(--color-card-bg);
    border: 1px solid var(--color-border);
    padding: 2.5rem 2rem 2rem 2rem;
    border-radius: 8px;
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    transition: var(--transition-smooth);
    box-shadow: 0 4px 10px var(--color-shadow);
    position: relative;
    overflow: hidden;
}

.book-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background-color: var(--color-accent-green);
    transition: var(--transition-smooth);
}

.book-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 12px 30px var(--color-shadow-hover);
    border-color: rgba(169, 74, 43, 0.2);
}

.book-card:hover::before {
    background-color: var(--color-accent);
}

.book-cover-container {
    width: 100%;
    height: 300px;
    margin-bottom: 2rem;
    perspective: 1000px;
    display: flex;
    justify-content: center;
    align-items: center;
}

.book-cover-wrapper {
    width: 200px;
    height: 280px;
    position: relative;
    transform-style: preserve-3d;
    transition: transform 0.6s cubic-bezier(0.4, 0.0, 0.2, 1);
    box-shadow: 3px 6px 18px rgba(0,0,0,0.15);
}

/* We will implement a flip container so users can see the back cover on hover */
.book-card:hover .book-cover-wrapper.has-back {
    transform: rotateY(-180deg);
}

.book-cover-side {
    position: absolute;
    width: 100%;
    height: 100%;
    backface-visibility: hidden;
    border-radius: 2px 4px 4px 2px;
    overflow: hidden;
}

.book-cover-front {
    background-color: var(--color-bg-alt);
}

.book-cover-back {
    background-color: var(--color-bg-alt);
    transform: rotateY(180deg);
    border-left: 2px solid rgba(0,0,0,0.1);
}

.book-cover-side img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.book-card h3 {
    font-family: var(--font-serif);
    font-size: 1.6rem;
    margin-bottom: 0.3rem;
    font-weight: 700;
}

.book-author {
    font-size: 0.85rem;
    color: var(--color-accent);
    text-transform: uppercase;
    font-weight: 600;
    letter-spacing: 0.1em;
    margin-bottom: 0.8rem;
}

.book-artist {
    font-size: 0.85rem;
    color: var(--color-text-muted);
    margin-bottom: 1rem;
    font-style: italic;
}

.book-card .price {
    font-size: 1.25rem;
    font-family: var(--font-serif);
    font-weight: 700;
    color: var(--color-accent-green);
    margin-bottom: 1.5rem;
}

.book-card-actions {
    display: flex;
    gap: 0.8rem;
    width: 100%;
    margin-top: auto;
}

.book-card-actions .btn {
    flex: 1;
    padding: 0.75rem 1rem;
    font-size: 0.75rem;
}

/* About Us Section (Quiénes Somos) */
.about-grid {
    display: grid;
    grid-template-columns: 3fr 2fr;
    gap: 5rem;
    align-items: start;
}

.about-text h2 {
    font-family: var(--font-serif);
    font-size: 3rem;
    line-height: 1.1;
    margin-bottom: 2rem;
}

.about-text p {
    font-size: 1.1rem;
    color: var(--color-text-muted);
    margin-bottom: 1.8rem;
    text-align: justify;
}

/* Dropped Capital Letter (Letra Capital) */
.about-text p.manifesto-lead::first-letter {
    font-family: var(--font-serif);
    font-size: 4.8rem;
    float: left;
    line-height: 0.8;
    padding-right: 12px;
    padding-top: 4px;
    font-weight: 700;
    color: var(--color-accent);
}

.about-visual {
    background-color: var(--color-bg-alt);
    border: 1px solid var(--color-border);
    padding: 3rem;
    border-radius: 8px;
    text-align: center;
    position: sticky;
    top: 130px;
}

.about-visual img {
    width: 100%;
    max-width: 250px;
    height: auto;
    margin-bottom: 2rem;
}

.about-badge {
    display: inline-block;
    border: 1px solid var(--color-accent);
    color: var(--color-accent);
    padding: 0.5rem 1.2rem;
    font-size: 0.8rem;
    font-weight: 600;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    border-radius: 20px;
}

/* Book Detail Page */
.detail-container {
    display: grid;
    grid-template-columns: 5fr 7fr;
    gap: 5rem;
}

.detail-visual {
    position: sticky;
    top: 130px;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 2rem;
}

.detail-cover-view {
    perspective: 1200px;
    width: 100%;
    display: flex;
    justify-content: center;
}

.detail-cover-wrapper {
    width: 320px;
    height: 450px;
    position: relative;
    transform-style: preserve-3d;
    transition: transform 0.8s cubic-bezier(0.2, 0.8, 0.2, 1);
    box-shadow: 5px 10px 30px rgba(0,0,0,0.18);
}

.detail-cover-wrapper.flipped {
    transform: rotateY(-180deg);
}

.detail-cover-side {
    position: absolute;
    width: 100%;
    height: 100%;
    backface-visibility: hidden;
    border-radius: 4px;
    overflow: hidden;
}

.detail-cover-front {
    background-color: var(--color-bg-alt);
}

.detail-cover-back {
    background-color: var(--color-bg-alt);
    transform: rotateY(180deg);
    border-left: 2px solid rgba(0,0,0,0.1);
}

.detail-cover-side img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.detail-cover-controls {
    display: flex;
    gap: 1rem;
}

.detail-cover-btn {
    border: 1px solid var(--color-border);
    padding: 0.5rem 1.2rem;
    font-size: 0.8rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    border-radius: 4px;
    background-color: var(--color-bg);
}

.detail-cover-btn.active, .detail-cover-btn:hover {
    background-color: var(--color-accent-green);
    color: white;
    border-color: var(--color-accent-green);
}

.detail-info h2 {
    font-family: var(--font-serif);
    font-size: 3.2rem;
    line-height: 1.1;
    margin-bottom: 0.5rem;
}

.detail-meta-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1.5rem;
    border-top: 1px solid var(--color-border);
    border-bottom: 1px solid var(--color-border);
    padding: 1.5rem 0;
    margin: 2rem 0;
}

.meta-item {
    font-size: 0.95rem;
}

.meta-label {
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--color-text-muted);
    margin-bottom: 0.2rem;
}

.meta-val {
    font-weight: 600;
}

.detail-price-box {
    display: flex;
    align-items: center;
    justify-content: space-between;
    background-color: var(--color-bg-alt);
    padding: 1.5rem 2rem;
    border-radius: 6px;
    margin-bottom: 2.5rem;
    border: 1px solid var(--color-border);
}

.detail-price-box .price-label {
    font-size: 0.9rem;
    color: var(--color-text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.detail-price-box .price-val {
    font-family: var(--font-serif);
    font-size: 2.2rem;
    font-weight: 700;
    color: var(--color-accent-green);
}

.detail-description {
    margin-bottom: 3.5rem;
}

.detail-description h3 {
    font-family: var(--font-serif);
    font-size: 1.8rem;
    margin-bottom: 1rem;
    border-bottom: 1px solid var(--color-border);
    padding-bottom: 0.5rem;
}

.detail-description p {
    font-size: 1.05rem;
    color: var(--color-text-muted);
    line-height: 1.7;
    margin-bottom: 1rem;
    text-align: justify;
}

/* User Reviews Section */
.reviews-section {
    border-top: 1px solid var(--color-border);
    padding-top: 3.5rem;
}

.reviews-section h3 {
    font-family: var(--font-serif);
    font-size: 2rem;
    margin-bottom: 2rem;
}

.reviews-summary {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: 3rem;
    align-items: center;
    background-color: var(--color-bg-alt);
    padding: 2rem;
    border-radius: 8px;
    border: 1px solid var(--color-border);
    margin-bottom: 3rem;
}

.rating-avg-box {
    text-align: center;
    border-right: 1px solid var(--color-border);
    padding-right: 3rem;
}

.rating-avg-num {
    font-family: var(--font-serif);
    font-size: 3.8rem;
    font-weight: 700;
    line-height: 1;
    color: var(--color-accent);
}

.stars {
    color: #e2a02b;
    font-size: 1.1rem;
    margin: 0.5rem 0;
}

.stars-large {
    font-size: 1.4rem;
}

.rating-count {
    font-size: 0.85rem;
    color: var(--color-text-muted);
}

.add-review-box h4 {
    font-family: var(--font-serif);
    font-size: 1.3rem;
    margin-bottom: 1rem;
}

.review-form {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 0.3rem;
}

.form-group label {
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    font-weight: 600;
}

.form-group input, .form-group textarea, .form-group select {
    border: 1px solid var(--color-border);
    padding: 0.7rem 1rem;
    border-radius: 4px;
    font-family: var(--font-sans);
    font-size: 0.9rem;
    background-color: white;
    outline: none;
    transition: var(--transition-smooth);
}

.form-group input:focus, .form-group textarea:focus, .form-group select:focus {
    border-color: var(--color-accent);
    box-shadow: 0 0 0 3px rgba(169, 74, 43, 0.08);
}

.star-rating-select {
    display: flex;
    gap: 0.4rem;
    margin-top: 0.2rem;
}

.star-rating-select span {
    font-size: 1.6rem;
    color: #ccc;
    cursor: pointer;
    transition: var(--transition-smooth);
}

.star-rating-select span.selected, .star-rating-select span:hover, .star-rating-select span:hover ~ span {
    color: #e2a02b;
}

.reviews-list {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.review-item {
    background-color: var(--color-card-bg);
    border: 1px solid var(--color-border);
    padding: 1.8rem;
    border-radius: 6px;
    box-shadow: 0 2px 5px var(--color-shadow);
}

.review-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
}

.reviewer-name {
    font-weight: 600;
    font-size: 1rem;
}

.review-date {
    font-size: 0.8rem;
    color: var(--color-text-muted);
}

.review-comment {
    color: var(--color-text-muted);
    font-size: 0.95rem;
    line-height: 1.6;
}

/* Cart Drawer (Carrito) */
.cart-drawer {
    position: fixed;
    top: 0;
    right: -450px;
    width: 450px;
    height: 100vh;
    background-color: var(--color-bg);
    box-shadow: -5px 0 30px rgba(0,0,0,0.15);
    z-index: 1000;
    transition: right 0.4s cubic-bezier(0.16, 1, 0.3, 1);
    display: flex;
    flex-direction: column;
    border-left: 1px solid var(--color-border);
}

.cart-drawer.open {
    right: 0;
}

.cart-drawer-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100vh;
    background-color: rgba(26, 30, 27, 0.4);
    backdrop-filter: blur(4px);
    z-index: 999;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition-smooth);
}

.cart-drawer-overlay.open {
    opacity: 1;
    visibility: visible;
}

.cart-header {
    padding: 2rem;
    border-bottom: 1px solid var(--color-border);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.cart-header h3 {
    font-family: var(--font-serif);
    font-size: 1.8rem;
}

.close-cart-btn {
    font-size: 1.5rem;
    color: var(--color-text-muted);
    padding: 5px;
}

.close-cart-btn:hover {
    color: var(--color-accent);
    transform: rotate(90deg);
}

.cart-items-container {
    flex: 1;
    overflow-y: auto;
    padding: 2rem;
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.cart-item {
    display: flex;
    gap: 1rem;
    align-items: center;
    border-bottom: 1px solid var(--color-border);
    padding-bottom: 1.5rem;
}

.cart-item-img {
    width: 60px;
    height: 80px;
    object-fit: cover;
    border-radius: 2px;
    box-shadow: 1px 2px 5px rgba(0,0,0,0.1);
}

.cart-item-info {
    flex: 1;
}

.cart-item-title {
    font-family: var(--font-serif);
    font-size: 1.15rem;
    font-weight: 700;
    margin-bottom: 0.2rem;
}

.cart-item-author {
    font-size: 0.75rem;
    color: var(--color-text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 0.5rem;
}

.cart-item-price {
    font-weight: 600;
    color: var(--color-accent-green);
    font-size: 0.95rem;
}

.cart-item-qty {
    display: flex;
    align-items: center;
    gap: 0.8rem;
    margin-top: 0.5rem;
}

.qty-btn {
    width: 24px;
    height: 24px;
    border: 1px solid var(--color-border);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.8rem;
    background-color: white;
}

.qty-btn:hover {
    background-color: var(--color-accent);
    color: white;
    border-color: var(--color-accent);
}

.remove-item-btn {
    color: var(--color-text-muted);
    font-size: 0.85rem;
    margin-left: auto;
    padding: 5px;
}

.remove-item-btn:hover {
    color: var(--color-accent);
}

.cart-empty-message {
    text-align: center;
    color: var(--color-text-muted);
    margin: auto 0;
}

.cart-footer {
    padding: 2rem;
    border-top: 1px solid var(--color-border);
    background-color: var(--color-bg-alt);
}

.cart-totals-row {
    display: flex;
    justify-content: space-between;
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 1.5rem;
}

.cart-totals-row .total-val {
    font-family: var(--font-serif);
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-accent-green);
}

/* Checkout Page */
.checkout-layout {
    display: grid;
    grid-template-columns: 7fr 5fr;
    gap: 4rem;
}

.checkout-section-title {
    font-family: var(--font-serif);
    font-size: 1.8rem;
    margin-bottom: 1.5rem;
    border-bottom: 1px solid var(--color-border);
    padding-bottom: 0.5rem;
}

.checkout-form {
    display: flex;
    flex-direction: column;
    gap: 2.5rem;
}

.payment-methods-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
    margin-bottom: 1.5rem;
}

.payment-method-card {
    border: 2px solid var(--color-border);
    padding: 1.5rem;
    border-radius: 6px;
    cursor: pointer;
    text-align: center;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
    transition: var(--transition-smooth);
    background-color: white;
}

.payment-method-card.selected {
    border-color: var(--color-accent);
    background-color: rgba(169, 74, 43, 0.02);
    box-shadow: 0 4px 10px rgba(169, 74, 43, 0.05);
}

.payment-method-logo {
    height: 30px;
    width: auto;
    object-fit: contain;
}

.payment-method-title {
    font-weight: 600;
    font-size: 0.95rem;
}

.payment-method-desc {
    font-size: 0.75rem;
    color: var(--color-text-muted);
}

/* Shipping summary */
.shipping-options-list {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.shipping-option {
    border: 1px solid var(--color-border);
    padding: 1.2rem;
    border-radius: 6px;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 1rem;
    background-color: white;
    transition: var(--transition-smooth);
}

.shipping-option.selected {
    border-color: var(--color-accent-green);
    background-color: rgba(35, 62, 51, 0.02);
}

.shipping-option input {
    accent-color: var(--color-accent-green);
}

.shipping-option-details {
    flex: 1;
}

.shipping-option-title {
    font-weight: 600;
    font-size: 0.95rem;
}

.shipping-option-desc {
    font-size: 0.8rem;
    color: var(--color-text-muted);
}

.shipping-option-price {
    font-weight: 700;
    color: var(--color-accent-green);
}

/* Order Summary Box */
.order-summary-box {
    background-color: var(--color-bg-alt);
    border: 1px solid var(--color-border);
    padding: 2.5rem 2rem;
    border-radius: 8px;
    position: sticky;
    top: 130px;
}

.summary-items-list {
    display: flex;
    flex-direction: column;
    gap: 1.2rem;
    margin-bottom: 2rem;
}

.summary-item {
    display: flex;
    justify-content: space-between;
    font-size: 0.95rem;
}

.summary-item-name {
    color: var(--color-text);
}

.summary-item-price {
    font-weight: 600;
}

.summary-divider {
    height: 1px;
    background-color: var(--color-border);
    margin: 1.5rem 0;
}

.summary-totals {
    display: flex;
    flex-direction: column;
    gap: 0.8rem;
}

.summary-total-row {
    display: flex;
    justify-content: space-between;
    font-size: 0.95rem;
    color: var(--color-text-muted);
}

.summary-total-row.grand-total {
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--color-text);
    margin-top: 0.5rem;
}

.summary-total-row.grand-total .total-val {
    font-family: var(--font-serif);
    font-size: 1.6rem;
    color: var(--color-accent-green);
}

/* Payment Gateway Simulation Modal */
.payment-modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100vh;
    background-color: rgba(26, 30, 27, 0.6);
    backdrop-filter: blur(6px);
    z-index: 2000;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition-smooth);
}

.payment-modal.open {
    opacity: 1;
    visibility: visible;
}

.payment-modal-card {
    background-color: white;
    width: 100%;
    max-width: 500px;
    border-radius: 12px;
    box-shadow: 0 15px 40px rgba(0,0,0,0.25);
    overflow: hidden;
    animation: scaleUp 0.4s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

@keyframes scaleUp {
    from {
        opacity: 0;
        transform: scale(0.92);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}

.payment-modal-header {
    padding: 2rem 2.5rem;
    color: white;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.payment-modal-header.mercadopago {
    background-color: #009ee3; /* Mercado Pago Blue */
}

.payment-modal-header.paypal {
    background-color: #003087; /* PayPal Blue */
}

.payment-modal-header h4 {
    font-size: 1.25rem;
    font-weight: 600;
}

.payment-modal-body {
    padding: 2.5rem;
}

.payment-modal-footer {
    padding: 1.5rem 2.5rem;
    border-top: 1px solid var(--color-border);
    background-color: #f9f9f9;
    display: flex;
    justify-content: flex-end;
    gap: 1rem;
}

.sim-input-row {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 1rem;
}

/* Success screens */
.payment-status-screen {
    text-align: center;
    padding: 3rem 2rem;
}

.status-icon {
    width: 70px;
    height: 70px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1.5rem auto;
    font-size: 2.2rem;
    color: white;
}

.status-icon.success {
    background-color: #2e7d32;
}

.status-icon.failure {
    background-color: #c62828;
}

.status-title {
    font-family: var(--font-serif);
    font-size: 2.2rem;
    margin-bottom: 0.8rem;
    color: var(--color-accent-green);
}

.status-desc {
    color: var(--color-text-muted);
    margin-bottom: 2rem;
}

/* Footer */
footer {
    background-color: var(--color-accent-green);
    color: white;
    padding: 5rem 0 3rem 0;
    border-top: 1px solid rgba(255,255,255,0.05);
}

.footer-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 3rem;
    margin-bottom: 4rem;
}

.footer-col h4 {
    font-family: var(--font-serif);
    font-size: 1.35rem;
    margin-bottom: 1.5rem;
    position: relative;
    padding-bottom: 0.5rem;
}

.footer-col h4::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 30px;
    height: 1px;
    background-color: var(--color-accent);
}

.footer-col p {
    font-size: 0.9rem;
    color: rgba(255,255,255,0.7);
    line-height: 1.7;
}

.footer-col ul {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 0.8rem;
}

.footer-col a {
    font-size: 0.9rem;
    color: rgba(255,255,255,0.7);
}

.footer-col a:hover {
    color: var(--color-accent);
    padding-left: 5px;
}

.social-links {
    display: flex;
    gap: 1.2rem;
    margin-top: 1rem;
}

.social-link {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background-color: rgba(255,255,255,0.08);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 1rem;
}

.social-link:hover {
    background-color: var(--color-accent);
    transform: translateY(-3px);
}

.footer-bottom {
    border-top: 1px solid rgba(255,255,255,0.08);
    padding-top: 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.85rem;
    color: rgba(255,255,255,0.5);
}

/* Responsiveness */
@media (max-width: 1024px) {
    .hero-section {
        grid-template-columns: 1fr;
        gap: 3rem;
        text-align: center;
    }
    
    .hero-content p {
        margin-left: auto;
        margin-right: auto;
    }
    
    .hero-cta {
        justify-content: center;
    }
    
    .books-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 2rem;
    }
    
    .detail-container {
        grid-template-columns: 1fr;
        gap: 3rem;
    }
    
    .detail-visual {
        position: relative;
        top: 0;
    }
    
    .checkout-layout {
        grid-template-columns: 1fr;
        gap: 3rem;
    }
    
    .order-summary-box {
        position: relative;
        top: 0;
    }
}

@media (max-width: 768px) {
    .nav-container {
        height: 80px;
    }
    
    nav {
        display: none; /* simple mobile nav toggle can be added, or keep menu compact */
    }
    
    .books-grid {
        grid-template-columns: 1fr;
        max-width: 400px;
        margin: 0 auto;
    }
    
    .about-grid {
        grid-template-columns: 1fr;
        gap: 3rem;
    }
    
    .about-visual {
        position: relative;
        top: 0;
        padding: 2rem;
    }
    
    .footer-grid {
        grid-template-columns: 1fr 1fr;
    }
    
    .cart-drawer {
        width: 100%;
        right: -100%;
    }
    
    .hero-logo-frame {
        width: 300px;
        height: 300px;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 1rem;
    }

    .footer-grid {
        grid-template-columns: 1fr;
    }
    
    .hero-content h1 {
        font-size: 2.5rem;
    }
    
    .hero-cta {
        flex-direction: column;
        width: 100%;
        gap: 1rem;
    }
    
    .hero-cta .btn {
        width: 100%;
    }
    
    .hero-logo-frame {
        width: 260px;
        height: 260px;
    }
    
    .detail-cover-wrapper {
        width: 100%;
        max-width: 280px;
        height: auto;
        aspect-ratio: 280 / 390;
        margin: 0 auto;
    }
    
    .detail-info h2 {
        font-size: 2.4rem;
    }
    
    .form-row {
        grid-template-columns: 1fr;
    }
    
    .reviews-summary {
        grid-template-columns: 1fr;
        gap: 1.5rem;
        text-align: center;
    }
    
    .rating-avg-box {
        border-right: none;
        border-bottom: 1px solid var(--color-border);
        padding-right: 0;
        padding-bottom: 1.5rem;
    }
    
    .payment-methods-grid {
        grid-template-columns: 1fr;
    }
}

/* Authors Page Styles */
.authors-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 3rem;
    margin-top: 3rem;
}

.author-card {
    background-color: var(--color-bg-alt);
    border: 1px solid var(--color-border);
    border-radius: 8px;
    padding: 2.5rem;
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.author-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 20px rgba(0,0,0,0.05);
    border-color: var(--color-accent);
}

.author-header {
    display: flex;
    align-items: center;
    gap: 1.5rem;
}

.author-avatar-container {
    width: 80px;
    height: 80px;
    border-radius: 50%;
    overflow: hidden;
    border: 2px solid var(--color-accent);
    flex-shrink: 0;
}

.author-avatar {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.author-meta h3 {
    font-family: var(--font-serif);
    font-size: 1.6rem;
    color: var(--color-text);
    margin-bottom: 0.2rem;
}

.author-book-badge {
    display: inline-block;
    font-size: 0.8rem;
    text-transform: uppercase;
    font-weight: 700;
    color: var(--color-accent);
    letter-spacing: 0.05em;
}

.author-bio {
    font-size: 0.95rem;
    color: var(--color-text-muted);
    line-height: 1.6;
}

.author-quote-box {
    margin-top: auto;
    border-left: 3px solid var(--color-border);
    padding-left: 1.2rem;
    font-style: italic;
}

.author-quote-title {
    font-size: 0.8rem;
    text-transform: uppercase;
    font-weight: 700;
    letter-spacing: 0.1em;
    color: var(--color-text-muted);
    margin-bottom: 0.5rem;
}

.author-quote {
    font-family: var(--font-serif);
    font-size: 1.05rem;
    line-height: 1.5;
    color: var(--color-text);
}

/* Responsiveness for Authors */
@media (max-width: 1024px) {
    .authors-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 2rem;
    }
}

@media (max-width: 768px) {
    .authors-grid {
        grid-template-columns: 1fr;
        max-width: 500px;
        margin: 2rem auto 0 auto;
    }
    
    .author-card {
        padding: 1.5rem;
    }
}