: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: relative; z-index: 100;}

.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; min-width: 0; /* Fix flex overflow on mobile */ }

.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; white-space: nowrap; }

.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; padding: 0.5rem; }

/* --- 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; line-height: 1.2; }
.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); }


/* --- PRODUCT GRID (STRICT ALIGNMENT) --- */
.book-carousel, .product-grid { 
    display: grid; 
    grid-template-columns: repeat(5, 1fr); 
    gap: 2.5rem 1.5rem; 
    align-items: flex-start;
}

.book-card { 
    text-align: left; 
    display: flex; 
    flex-direction: column;
    width: 100%;
    position: relative;
    /* No fixed height on card itself, handled by content flow */
}

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

/* IMAGE - UPDATED: Fluid Width instead of Fixed 166px */
.book-card img { 
    width: 100%;             /* Changed from 166px to 100% for responsive */
    aspect-ratio: 2 / 3;    /* Maintain aspect ratio */
    object-fit: cover; 
    border-radius: 4px; 
    margin: 0 auto 0.75rem auto; 
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1); 
    transition: transform 0.3s ease, box-shadow 0.3s ease; 
    display: block; 
}
.book-card:hover img { transform: scale(1.05); box-shadow: 0 8px 20px rgba(0, 0, 0, 0.15); }

/* 
   SLOT 1: TITLE 
   Height: Auto (JS will measure)
   Max Lines: 2
   Line Height: 1.4rem
*/
.book-card h3 { 
    font-family: var(--font-secondary); 
    font-size: 1rem; 
    line-height: 1.4rem; 
    /* Important: NO fixed height. Let JS + CSS determine flow. */
    margin-bottom: 0.25rem; 
    
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
    text-overflow: ellipsis;
}
.book-card h3 a { color: var(--text-primary); }

/* 
   SLOT 2: META (Author OR Rating) 
   Fixed Height: 1.5rem
*/
.book-card .meta-slot {
    height: 1.5rem; 
    margin-bottom: 0.25rem;
    display: flex;
    align-items: center;
    overflow: hidden;
    white-space: nowrap;
}
.book-card .card-author {
    font-size: 0.9rem; 
    color: var(--text-secondary); 
    margin: 0;
    overflow: hidden;
    text-overflow: ellipsis;
    width: 100%;
}
.book-card .card-rating {
    font-size: 0.85rem;
    color: var(--rating-color);
    display: flex;
    align-items: center;
}

/* 
   SLOT 3: FILLER (Original Price)
   Fixed Height: 1.4rem (Matches 1 line of Title)
   Visibility: Controlled by JS (block if Title=1 line, none if Title=2 lines)
*/
.book-card .filler-slot {
    height: 1.4rem; 
    display: flex; /* Flex but JS might toggle to none */
    align-items: center;
    margin-bottom: 0.1rem;
}
.book-card .original-price {
    font-size: 0.85rem;
    color: var(--text-secondary);
    text-decoration: line-through;
    opacity: 0.6;
}

/* 
   SLOT 4: PRICE 
   Fixed Height: ~1.4rem
*/
.book-card .price { 
    font-size: 1.1rem; 
    font-weight: bold; 
    color: var(--accent-primary); 
    display: block;
    line-height: 1.2;
}

/* 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; line-height: 1.2;}

/* 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; flex-wrap: wrap; gap: 1rem; }
.category-controls .form-group { margin-bottom: 0; }
.category-controls p { margin: 0; }

.pagination { display: flex; justify-content: center; align-items: center; list-style: none; margin-top: 3rem; gap: 0.5rem; flex-wrap: wrap;}
.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 (RESTORED) */
.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: 2rem; }
.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; }
.book-info-sticky-header h1 { font-family: var(--font-secondary); font-size: 2.8rem; margin-bottom: 0.5rem; line-height: 1.1; }

.author-row { display: flex; align-items: center; gap: 1rem; margin-bottom: 0.75rem; flex-wrap: wrap; min-height: 2rem; }
.author-row .author { font-size: 1.5rem; color: var(--text-secondary); margin-bottom: 0; margin-right: 0.5rem; }
.rating-display { display: flex; align-items: center; gap: 0.5rem; font-size: 1rem; color: var(--rating-color); line-height: 1; }
/* Only show left border if previous element exists and is visible */
.author-row .author:not([style*="none"]) + .rating-display { padding-left: 1.5rem; border-left: 2px solid var(--border-color); }
.rating-display .stars { display: flex; gap: 2px; }
.rating-display .rating-count { color: var(--text-secondary); font-size: 0.9rem; margin-left: 0.2rem; }

.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; }

.promo-badge { display: inline-flex; align-items: center; gap: 0.5rem; background-color: #FEF3C7; border: 2px dashed #D97706; 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; }

.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; 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-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 .author-small { font-size: 0.8rem; color: var(--text-secondary); margin-bottom: 0.2rem; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.book-card-mini .price { font-size: 0.9rem; font-weight: bold; color: var(--accent-primary); margin-top: auto; }

/* 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; }

/* Login & Search Forms */
.form-container { max-width: 500px; margin: 2rem auto; padding: 2.5rem; background-color: var(--bg-secondary); border-radius: 8px; }
.form-group { margin-bottom: 1.5rem; text-align: left; }
.form-group label { display: block; margin-bottom: 0.5rem; font-weight: bold; }
.form-group input, .form-group select { width: 100%; padding: 0.8rem; border: 1px solid var(--border-color); border-radius: 5px; background: var(--bg-main); }
.form-container p { margin-top: 1.5rem; text-align: center; }

/* Help Page */
.faq-item { background-color: var(--bg-secondary); margin-bottom: 1rem; border-radius: 8px; border: 1px solid var(--border-color); }
.faq-item summary { font-weight: bold; padding: 1rem 1.5rem; cursor: pointer; position: relative; font-family: var(--font-secondary); }
.faq-item summary::after { content: '+'; position: absolute; right: 1.5rem; font-size: 1.5rem; }
.faq-item[open] summary::after { content: '−'; }
.faq-item div { padding: 0 1.5rem 1.5rem 1.5rem; }

/* --- Responsive Design Updates --- */

@media (max-width: 1200px) {
    .book-carousel, .product-grid { grid-template-columns: repeat(4, 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; margin-left: auto; }
    .logo { order: 1; }
    .search-container { order: 3; flex-basis: 100%; margin-top: 1rem; }
    .header-main { padding: 0.5rem 0; }
    
    /* Navigation Toggle */
    .menu-toggle { display: block; }
    .main-nav { position: relative; padding: 0; background-color: transparent; border-top: none; }
    .nav-links { 
        display: none; /* JS toggles 'active' class (display:flex) */
        flex-direction: column; 
        position: absolute; 
        top: 10px; 
        left: 0; 
        right: 0; 
        background-color: var(--bg-main); 
        box-shadow: 0 10px 15px rgba(0,0,0,0.1); 
        z-index: 1000; 
        border: 1px solid var(--border-color); 
        border-radius: 4px;
    }
    .nav-links.active { display: flex; }
    .nav-links li { width: 100%; }
    .nav-links a { padding: 1rem; border-bottom: 1px solid var(--border-color); text-align: center; background-color: var(--bg-main); }
    .nav-links a:hover { background-color: var(--bg-secondary); }

    .book-carousel, .product-grid { grid-template-columns: repeat(3, 1fr); gap: 1.5rem; }
    .category-page-layout { grid-template-columns: 1fr; }
    
    .book-details-layout { grid-template-columns: 1fr; }
    .book-cover-column { position: static; max-width: 320px; margin: 0 auto 2rem auto; }
}

@media (max-width: 768px) {
    .container { width: 94%; }
    .hero-section h1 { font-size: 2.2rem; }
    .hero-section p { font-size: 1rem; }
    
    .book-carousel, .product-grid { grid-template-columns: repeat(3, 1fr); gap: 1rem; }
    
    .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: stretch; gap: 1rem; }
    .price-action-row .btn { text-align: center; width: 100%; }
    
    .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); }
    
    .category-card { padding: 1.5rem; }
    .category-main-content .page-title { font-size: 2rem; }
}

@media (max-width: 550px) {
    /* Mobile Grid - 2 Columns */
    .book-carousel, .product-grid { 
        grid-template-columns: repeat(2, 1fr); 
        gap: 1rem 0.75rem; /* Tight gap for small screens */
    }
    
    /* Header Adjustments */
    .logo a { font-size: 1.5rem; }
    .header-actions { gap: 0.75rem; }
    .header-action-link span:not(.cart-count) { display: none; } /* Hide text labels */
    
    /* Font Sizes */
    .book-card h3 { font-size: 0.9rem; line-height: 1.2rem; }
    .book-card .price { font-size: 1rem; }
    
    /* Hide less critical info on very small screens to save space */
    .book-card .meta-slot { display: none; } 
    .book-card .filler-slot { height: 0.5rem; opacity: 0; } /* Keep space but hide content */
    
    .btn-hero { padding: 0.8rem 1.5rem; width: 100%; }
    
    .book-info h1 { font-size: 2rem; }
}