:root {
    --bg-main: #FDF8F0; /* Light Cream */
    --bg-secondary: #F5EFE6; /* Earthy Beige */
    --bg-tertiary: #E8DFCA;
    --text-primary: #4E443A; /* Warm Dark Grey/Brown */
    --text-secondary: #786A5E;
    --accent-primary: #D1512D; /* Terracotta/Rust */
    --accent-primary-darker: #a13f22;
    --accent-secondary: #3A8891; /* Muted Teal */
    --rating-color: #F59E0B; /* Deep Yellow / Amber */
    --border-color: #DCD0B9;
    --font-primary: 'Roboto', sans-serif;
    --font-secondary: 'Merriweather', serif;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

body { font-family: var(--font-primary); background-color: var(--bg-main); color: var(--text-primary); line-height: 1.6; }

.container { width: 90%; max-width: 1200px; margin: 0 auto; }

a { color: var(--accent-secondary); text-decoration: none; transition: color 0.3s ease; }

a:hover { color: var(--accent-primary); text-decoration: underline; }

img { max-width: 100%; height: auto; display: block; }

/* --- Header --- */
.site-header { background-color: var(--bg-main); box-shadow: 0 2px 4px rgba(0,0,0,0.05); position: sticky; top: 0; z-index: 1000; }

.header-top { padding: 1rem 0; border-bottom: 1px solid var(--border-color); }

.header-top .container { display: flex; justify-content: space-between; align-items: center; }

.logo a { font-family: var(--font-secondary); font-size: 2rem; color: var(--text-primary); text-decoration: none; font-weight: 700; }

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

.header-action-link { color: var(--text-secondary); font-weight: 500; text-decoration: none; font-size: 0.9rem; display: flex; align-items: center; gap: 0.25rem; }
.header-action-link .cart-icon { stroke: var(--text-primary); }
.header-action-link:hover { color: var(--accent-primary); text-decoration: none; }
.cart-count { background-color: var(--accent-primary); color: white; font-size: 0.75rem; font-weight: bold; border-radius: 50%; width: 20px; height: 20px; display: flex; align-items: center; justify-content: center; margin-left: -5px; }


.header-main { padding: 1rem 0; }

.search-container { width: 100%; max-width: 700px; margin: 0 auto; }

.search-bar { display: flex; border: 1px solid var(--border-color); border-radius: 50px; overflow: hidden; background-color: white; }

.search-bar input { border: none; padding: 0.75rem 1.5rem; font-size: 1rem; flex-grow: 1; background: transparent; }

.search-bar input:focus { outline: none; }

.search-bar button { background: var(--accent-primary); border: none; color: white; padding: 0.75rem 1.5rem; cursor: pointer; font-weight: bold; transition: background-color 0.3s ease; }

.search-bar button:hover { background-color: var(--accent-primary-darker); }

.main-nav { background-color: var(--bg-secondary); border-top: 1px solid var(--border-color); }

.nav-links { list-style: none; display: flex; justify-content: center; gap: 2.5rem; padding: 0; margin: 0; }

.nav-links a { display: block; padding: 0.75rem 0; color: var(--text-secondary); text-decoration: none; font-weight: 500; border-bottom: 2px solid transparent; }

.nav-links a:hover, .nav-links a.active { color: var(--text-primary); border-bottom-color: var(--accent-primary); text-decoration: none; }

.menu-toggle { display: none; background: none; border: none; cursor: pointer; z-index: 1001; }

/* --- Main Content --- */
.hero-section { background: var(--bg-secondary); padding: 4rem 0; text-align: center; border-bottom: 1px solid var(--border-color); }
.hero-section h1 { font-family: var(--font-secondary); font-size: 3rem; margin-bottom: 0.5rem; }
.hero-section p { font-size: 1.2rem; color: var(--text-secondary); margin-bottom: 2rem; }
.btn-hero { padding: 1rem 2.5rem; font-size: 1.1rem; display: inline-block; background-color: var(--accent-primary); color: white; border-radius: 4px; font-weight: bold; }


.book-shelf { padding: 3rem 0; border-bottom: 1px solid var(--border-color); }

.book-shelf.shelf-highlight { background-color: var(--bg-secondary); }

.shelf-title { font-family: var(--font-secondary); font-size: 2rem; margin-bottom: 2rem; text-align: center; position: relative; padding-bottom: 0.5rem; }
.shelf-title::after { content: ''; position: absolute; bottom: 0; left: 50%; transform: translateX(-50%); width: 60px; height: 3px; background-color: var(--accent-primary); }


/* Book Grid (formerly Carousel) */
.book-carousel { display: grid; grid-template-columns: repeat(6, 1fr); gap: 1.5rem; }

.book-card { text-align: left; display: flex; flex-direction: column; height: 100%; }

.book-card a { text-decoration: none; }

.book-card img { width: 100%; aspect-ratio: 2 / 3; object-fit: cover; border-radius: 4px; margin-bottom: 1rem; box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1); transition: transform 0.3s ease, box-shadow 0.3s ease; }

.book-card:hover img { transform: scale(1.05); box-shadow: 0 8px 20px rgba(0, 0, 0, 0.15); }

/* UPDATED: Limit Title to 2 lines */
.book-card h3 { 
    font-family: var(--font-secondary); 
    font-size: 1rem; 
    margin-bottom: 0.25rem; 
    line-height: 1.3;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
    text-overflow: ellipsis;
    height: 2.6rem; /* 1.3em * 2 lines */
}

.book-card h3 a { color: var(--text-primary); }
.book-card p { font-size: 0.9rem; color: var(--text-secondary); margin-bottom: 0.5rem; }
.book-card .price { font-size: 1.1rem; font-weight: bold; color: var(--accent-primary); margin-top: auto; }

/* Category Tags */
.category-tags { display: flex; flex-wrap: wrap; justify-content: center; gap: 1rem; }
.category-tag { background-color: var(--bg-main); border: 1px solid var(--border-color); padding: 0.5rem 1.25rem; border-radius: 20px; color: var(--text-secondary); font-weight: 500; transition: all 0.3s ease; text-decoration: none; }
.category-tag:hover { background-color: var(--accent-primary); color: white; border-color: var(--accent-primary); transform: translateY(-2px); }

/* --- Footer --- */
.site-footer { color: var(--text-secondary); font-size: 0.9rem; margin-top: auto;}
.footer-main { background-color: var(--bg-secondary); padding: 4rem 0; border-top: 1px solid var(--border-color); }
.footer-main .container { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 2rem; }
.footer-about .logo { font-size: 1.5rem; margin-bottom: 1rem;}
.footer-about p { font-size: 0.85rem; margin-bottom: 1.5rem; }

.footer-links h4 { color: var(--text-primary); font-weight: bold; font-family: var(--font-secondary); margin-bottom: 1rem; }
.footer-links ul { list-style: none; padding: 0; }
.footer-links li a { display: block; padding: 0.3rem 0; color: var(--text-secondary); }
.footer-newsletter p { font-size: 0.85rem; margin-bottom: 1rem; }

.newsletter-form { display: flex; }
.newsletter-form input { width: 100%; padding: 0.6rem; border: 1px solid var(--border-color); border-radius: 4px 0 0 4px; background-color: var(--bg-main); }
.newsletter-form input:focus { outline: none; border-color: var(--accent-primary); }
.btn { background-color: var(--accent-primary); color: white; padding: 0.6rem 1.2rem; text-decoration: none; border-radius: 4px; font-weight: bold; transition: background-color 0.3s ease; border: none; cursor: pointer; display: inline-block; text-align: center; }
.btn:hover { background-color: var(--accent-primary-darker); color: white; text-decoration: none; }
.newsletter-form .btn { border-radius: 0 4px 4px 0; }
.social-media { display: flex; gap: 1rem; align-items: center; }
.social-media img { width: 20px; height: 20px; opacity: 0.7; transition: opacity 0.3s; }
.social-media a:hover img { opacity: 1; }

.footer-bottom { padding: 1.5rem 0; background-color: var(--bg-tertiary); border-top: 1px solid var(--border-color); }
.footer-bottom .container { display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 1rem; }
.country-selector { display: flex; align-items: center; gap: 0.5rem; font-weight: 500; }
.country-selector img { width: 24px; }
.footer-legal-links { display: flex; gap: 1rem; flex-wrap: wrap; }
.footer-legal-links a { color: var(--text-secondary); }


/* --- Page Specific Styles --- */
.page-container { padding: 3rem 0; min-height: 60vh; }

.page-title { font-family: var(--font-secondary); font-size: 2.8rem; margin-bottom: 2.5rem; text-align: center; }

/* Category Page (categories.html) */
.category-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(250px, 1fr)); gap: 2rem; }
.category-card { background-color: var(--bg-secondary); padding: 2rem; text-align: center; border-radius: 8px; border: 1px solid var(--border-color); transition: all 0.3s ease; text-decoration: none; color: inherit; display: block;}
.category-card:hover { transform: translateY(-5px); box-shadow: 0 8px 16px rgba(0,0,0,0.07); border-color: var(--accent-primary); }
.category-card h3 { font-family: var(--font-secondary); color: var(--text-primary); margin-bottom: 0.5rem;}
.category-card p { color: var(--text-secondary); font-size: 0.9rem;}

/* Category Listing Page (category.html) */
.category-page-layout { display: grid; grid-template-columns: 280px 1fr; gap: 2.5rem; align-items: flex-start; }
.filter-sidebar { background-color: var(--bg-secondary); padding: 2rem; border-radius: 8px; border: 1px solid var(--border-color); }
.filter-group { margin-bottom: 2rem; }
.filter-group h4 { font-family: var(--font-secondary); margin-bottom: 1rem; padding-bottom: 0.5rem; border-bottom: 1px solid var(--border-color); }
.filter-group ul { list-style: none; padding: 0;}
.filter-group li a { display: block; padding: 0.4rem 0; cursor: pointer; }
.filter-group li a.active { color: var(--accent-primary); font-weight: bold; }
.filter-group .form-group { margin-bottom: 0.75rem; text-align: left;}

.category-main-content .page-title { text-align: left; font-size: 2.5rem; margin-bottom: 1rem; }
.category-controls { display: flex; justify-content: space-between; align-items: center; margin-bottom: 2rem; background-color: var(--bg-secondary); padding: 1rem; border-radius: 4px; }
.category-controls .form-group { margin-bottom: 0; }
.category-controls p { margin: 0; }

.product-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 2.5rem 1.5rem; }
.pagination { display: flex; justify-content: center; align-items: center; list-style: none; margin-top: 3rem; gap: 0.5rem; }
.pagination li button { display: block; padding: 0.75rem 1.25rem; border: 1px solid var(--border-color); border-radius: 4px; text-decoration: none; background: transparent; cursor: pointer; font-family: var(--font-primary); font-size: 1rem;}
.pagination li button:hover:not(:disabled) { background-color: var(--bg-tertiary); }
.pagination li button:disabled { opacity: 0.5; cursor: not-allowed; }


/* Book Details Page */
.breadcrumb { list-style: none; display: flex; flex-wrap: wrap; padding: .75rem 1rem; margin-bottom: 2rem; background-color: var(--bg-secondary); border-radius: .25rem; font-size: 0.9rem; }
.breadcrumb-item a { color: var(--text-secondary); }
.breadcrumb-item + .breadcrumb-item::before { content: '/'; display: inline-block; padding-right: .5rem; padding-left: .5rem; color: var(--text-secondary); }
.breadcrumb-item.active { color: var(--accent-primary); font-weight: bold; }

.book-details-layout { display: grid; grid-template-columns: 320px 1fr; gap: 3rem; align-items: flex-start; }
.book-cover-column { position: sticky; top: 6rem; }
.book-cover-container img { width: 100%; border-radius: 8px; box-shadow: 0 10px 25px rgba(0,0,0,0.1); margin-bottom: 2rem; }

.book-info-sticky-header { padding-bottom: 1.5rem; border-bottom: 1px solid var(--border-color); margin-bottom: 1.5rem; }
/* Reduced margins for tighter header */
.book-info-sticky-header h1 { font-family: var(--font-secondary); font-size: 2.8rem; margin-bottom: 0.25rem; line-height: 1.1; }

/* -- NEW: Author & Rating Row -- */
.author-row {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 0.75rem;
    flex-wrap: wrap;
}
.author-row .author { font-size: 1.5rem; color: var(--text-secondary); margin-bottom: 0; margin-right: 0.5rem; }

/* Rating Style moved here */
.rating-display { 
    display: flex; 
    align-items: center; 
    gap: 0.5rem; 
    font-size: 1rem; 
    color: var(--rating-color); 
    /* Vertical separator line */
    padding-left: 1.5rem;
    border-left: 2px solid var(--border-color);
    line-height: 1;
}
.rating-display .stars { display: flex; gap: 2px; }
.rating-display .rating-count { color: var(--text-secondary); font-size: 0.9rem; margin-left: 0.2rem; }

/* -- NEW: Combined Price & Action Row -- */
.price-action-row {
    display: flex;
    align-items: center;
    gap: 1.5rem;
    margin-top: 1.5rem;
    flex-wrap: wrap;
}

.price-action-row .price { font-size: 2rem; color: var(--accent-primary); font-weight: bold; margin-bottom: 0; line-height: 1;}
.price-action-row .btn { padding: 0.8rem 2rem; font-size: 1.1rem; }


/* Coupon below */
.promo-badge { 
    display: inline-flex; 
    align-items: center; 
    gap: 0.5rem; 
    background-color: #FEF3C7; /* Pale Yellow */
    border: 2px dashed #D97706; /* Amber border */
    color: #92400E; 
    padding: 0.4rem 1rem; 
    border-radius: 4px; 
    font-weight: bold; 
    font-size: 0.9rem; 
    cursor: pointer; 
    transition: all 0.2s ease;
    margin-top: 1rem;
}
.promo-badge:hover { background-color: #FDE68A; transform: scale(1.02); }
.promo-badge:active { transform: scale(0.98); }
.promo-badge svg { width: 16px; height: 16px; stroke-width: 2.5; }
/* ------------------------------- */

.book-info-body > div:not(:last-child) { margin-bottom: 3rem; }
.description h3, .book-tags h4, .book-metadata h3, .book-reviews h2, .book-discovery-tags h3 { font-family: var(--font-secondary); margin-bottom: 1.5rem; font-size: 1.5rem; }
.description p { margin-bottom: 1rem; }

.sidebar-widget { background-color: var(--bg-secondary); padding: 1.5rem; border-radius: 8px; border: 1px solid var(--border-color); margin-bottom: 1.5rem; }
.sidebar-widget h4 { font-family: var(--font-secondary); margin-bottom: 1rem; padding-bottom: 0.5rem; border-bottom: 1px solid var(--border-color); }
.sidebar-widget ul { list-style: none; padding:0; }
.sidebar-widget li { padding: 0.2rem 0; font-size: 0.9rem; }
.social-share { display: flex; gap: 1.5rem; align-items: center; }
.social-share img { width: 24px; height: 24px; opacity: 0.7; transition: opacity 0.3s; }
.social-share a:hover img { opacity: 1; }

.metadata-table { background-color: var(--bg-secondary); border-radius: 8px; border: 1px solid var(--border-color); padding: 2rem; box-shadow: 0 4px 12px rgba(0,0,0,0.05); transition: box-shadow 0.3s ease; }
.metadata-row { display: flex; align-items: flex-start; padding: 1rem 0; border-bottom: 1px solid var(--border-color); }
.metadata-row:last-child { border-bottom: none; padding-bottom: 0; }
.metadata-row:first-child { padding-top: 0; }
.metadata-label { font-weight: 700; color: var(--text-primary); flex-basis: 30%; padding-right: 1rem; flex-shrink: 0; text-align: left;}
.metadata-value { color: var(--text-secondary); flex-basis: 70%; text-align: left; }

/* Discovery Tags Section */
.book-discovery-tags {
    margin-top: 3rem;
}
.tag-list {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
}
.discovery-tag {
    background-color: var(--bg-main);
    border: 1px solid var(--border-color);
    padding: 0.5rem 1.25rem;
    border-radius: 999px; /* Pill shape */
    color: var(--text-secondary);
    font-weight: 500;
    transition: all 0.3s ease;
    text-decoration: none;
    font-size: 0.95rem;
}
.discovery-tag:hover {
    background-color: var(--accent-primary);
    color: white;
    border-color: var(--accent-primary);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0,0,0,0.1);
}

/* Related Products Section (INTERNAL) */
.related-internal-section {
    margin-top: 3rem;
    padding-top: 3rem;
    border-top: 1px solid var(--border-color);
}
.related-title-internal {
    font-family: var(--font-secondary);
    font-size: 1.5rem;
    margin-bottom: 1.5rem;
}
.related-grid-internal {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1rem;
}
.book-card-mini {
    display: flex;
    flex-direction: column;
}
.book-card-mini img {
    width: 100%;
    aspect-ratio: 2 / 3;
    object-fit: cover;
    border-radius: 4px;
    margin-bottom: 0.5rem;
    border: 1px solid var(--border-color);
}
.book-card-mini h3 {
    font-family: var(--font-secondary);
    font-size: 0.9rem;
    line-height: 1.3;
    margin-bottom: 0.2rem;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}
.book-card-mini h3 a { color: var(--text-primary); }
.book-card-mini .price {
    font-size: 0.9rem;
    font-weight: bold;
    color: var(--accent-primary);
}

/* Cart Page */
.cart-table { width: 100%; border-collapse: collapse; margin-bottom: 2rem; }
.cart-table th, .cart-table td { padding: 1rem; text-align: left; border-bottom: 1px solid var(--border-color); }
.cart-table th { background-color: var(--bg-secondary); font-family: var(--font-secondary); }
.cart-table .product-item { display: flex; align-items: center; gap: 1rem; }
.cart-table .product-item img { width: 60px; height: 90px; object-fit: cover; border-radius: 4px;}
.cart-table input[type="number"] { width: 60px; padding: 0.5rem; text-align: center; border: 1px solid var(--border-color); border-radius: 4px; }
.cart-summary { max-width: 450px; margin-left: auto; background: var(--bg-secondary); padding: 2rem; border-radius: 8px; }
.cart-summary h2 { font-family: var(--font-secondary); margin-bottom: 1rem; }
.cart-summary-item { display: flex; justify-content: space-between; margin-bottom: 0.5rem; }
.cart-summary-total { font-size: 1.2rem; font-weight: bold; border-top: 1px solid var(--border-color); padding-top: 1rem; margin-top: 1rem; }

/* Responsive */
@media (max-width: 1200px) {
    .book-carousel { grid-template-columns: repeat(5, 1fr); }
    .product-grid { grid-template-columns: repeat(3, 1fr); }
    .book-details-layout { grid-template-columns: 280px 1fr; gap: 2rem; }
    .related-grid-internal { grid-template-columns: repeat(3, 1fr); }
}

@media (max-width: 992px) {
    .header-top .container { flex-wrap: wrap; }
    .header-actions { order: 2; }
    .logo { order: 1; }
    .search-container { order: 3; flex-basis: 100%; margin-top: 1rem; }
    .header-main { padding: 0; }
    .menu-toggle { display: block; }
    .main-nav { display: none; } /* Simplified for now */
    .book-carousel { grid-template-columns: repeat(4, 1fr); }
    .product-grid { grid-template-columns: repeat(2, 1fr); }
    .category-page-layout { grid-template-columns: 1fr; }
    .book-details-layout { grid-template-columns: 1fr; }
    .book-cover-column { position: static; max-width: 300px; margin: 0 auto; }
}

@media (max-width: 768px) {
    .hero-section h1 { font-size: 2.5rem; }
    .book-carousel { grid-template-columns: repeat(3, 1fr); }
    .cart-table .product-item { flex-direction: column; align-items: flex-start; }
    .cart-summary { max-width: none; }
    .footer-main .container { grid-template-columns: 1fr; }
    .price-action-row { flex-direction: column; align-items: flex-start; gap: 1rem; }
    .author-row { flex-direction: column; align-items: flex-start; gap: 0.5rem; }
    .rating-display { border-left: none; padding-left: 0; margin-left: 0; }
    .related-grid-internal { grid-template-columns: repeat(2, 1fr); }
}