/* ========================================
   ABC Storybook - Consolidated Base CSS
   ======================================== */

/* CSS Variables */
:root {
    --primary-gradient: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --secondary-gradient: linear-gradient(135deg, #ffeaa7 0%, #fab1a0 100%);
    --accent-gradient: linear-gradient(135deg, #74b9ff 0%, #0984e3 100%);
    --card-shadow: 0 15px 35px rgba(0,0,0,0.1);
    --hover-shadow: 0 20px 40px rgba(0,0,0,0.15);
    --text-shadow: 0 2px 4px rgba(0,0,0,0.1);

    /* Colors */
    --primary-color: #667eea;
    --secondary-color: #764ba2;
    --accent-color: #74b9ff;
    --text-primary: #2c3e50;
    --text-secondary: #6c757d;
    --text-muted: #7f8c8d;
    --bg-light: #f8f9fa;
    --bg-white: #ffffff;
    --border-color: #e1e8ed;
    --error-color: #dc3545;
    --success-color: #28a745;
    --warning-color: #ffc107;

    /* Spacing */
    --spacing-xs: 5px;
    --spacing-sm: 10px;
    --spacing-md: 15px;
    --spacing-lg: 20px;
    --spacing-xl: 30px;
    --spacing-xxl: 40px;

    /* Border Radius */
    --radius-sm: 8px;
    --radius-md: 15px;
    --radius-lg: 20px;
    --radius-xl: 25px;
    --radius-round: 50px;

    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.6s ease;
}

/* ========================================
   Base Styles
   ======================================== */

* {
    box-sizing: border-box;
}

body {
    background: var(--primary-gradient);
    min-height: 100vh;
    font-family: 'Georgia', serif;
    overflow-x: hidden;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
}

/* ========================================
   Typography
   ======================================== */

h1, h2, h3, h4, h5, h6 {
    margin: 0 0 1rem 0;
    font-weight: 600;
    line-height: 1.2;
    color: var(--text-primary);
}

p {
    margin: 0 0 1rem 0;
    line-height: 1.6;
}

a {
    color: var(--primary-color);
    text-decoration: none;
    transition: color var(--transition-normal);
}

a:hover {
    color: var(--accent-color);
}

/* ========================================
   Layout Components
   ======================================== */

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
}

/* ========================================
   Navigation - Complete BulmaCSS Replacement
   ======================================== */

/* Reset and base styles for navigation */
.navbar {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    box-shadow: 0 2px 20px rgba(0,0,0,0.1);
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    width: 100%;
    z-index: 1000;
    transition: all var(--transition-normal);
    padding: 0;
    margin: 0;
    min-height: 64px;
    display: flex;
    align-items: center;
}

/* Container for navbar content */
.navbar .container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
    min-height: 64px;
}

/* Brand section */
.navbar-brand {
    display: flex;
    align-items: center;
    flex-shrink: 0;
}

.navbar-brand .navbar-item {
    display: flex;
    align-items: center;
    text-decoration: none;
    padding: var(--spacing-md) 0;
    font-size: 1.8rem;
    font-weight: bold;
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    transition: all var(--transition-normal);
}

.navbar-brand .navbar-item:hover {
    transform: translateY(-2px);
}

.navbar-brand .navbar-item img {
    height: 32px;
    width: auto;
    margin-right: var(--spacing-sm);
    display: block;
}

.navbar-brand .navbar-item span {
    color: #6c757d;
    font-size: 1.2rem;
    font-weight: 500;
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* Menu section */
.navbar-menu {
    display: flex;
    align-items: center;
    flex-grow: 1;
    justify-content: flex-end;
}

.navbar-end {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

/* Navigation items */
.navbar-item {
    color: var(--text-primary);
    font-weight: 500;
    text-decoration: none;
    padding: var(--spacing-md) var(--spacing-lg);
    border-radius: var(--radius-xl);
    transition: all var(--transition-normal);
    display: flex;
    align-items: center;
    position: relative;
    font-size: 1rem;
    white-space: nowrap;
}

.navbar-item:hover {
    color: var(--primary-color);
    background: rgba(102, 126, 234, 0.1);
    transform: translateY(-2px);
}

.navbar-item:focus {
    outline: none;
}

/* Active state for current page */
.navbar-item.is-active,
.navbar-item[aria-current="page"] {
    color: var(--primary-color);
    background: rgba(102, 126, 234, 0.15);
    font-weight: 600;
}

.navbar-item.is-active::after,
.navbar-item[aria-current="page"]::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 30px;
    height: 3px;
    background: var(--primary-color);
    border-radius: 2px;
}

/* Mobile menu toggle button */
.navbar-burger {
    display: none;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    width: 44px;
    height: 44px;
    background: transparent;
    border: none;
    cursor: pointer;
    padding: 8px;
    border-radius: var(--radius-sm);
    transition: all var(--transition-normal);
    position: relative;
}

.navbar-burger:hover {
    background: rgba(102, 126, 234, 0.1);
}

.navbar-burger:focus {
    outline: none;
}

/* Hamburger lines */
.navbar-burger span {
    display: block;
    width: 20px;
    height: 2px;
    background: var(--text-primary);
    margin: 3px 0;
    transition: all var(--transition-normal);
    transform-origin: center;
    border-radius: 1px;
}

/* Animated hamburger to X */
.navbar-burger.is-active span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
}

.navbar-burger.is-active span:nth-child(2) {
    opacity: 0;
    transform: scale(0);
}

.navbar-burger.is-active span:nth-child(3) {
    transform: rotate(-45deg) translate(7px, -6px);
}

/* Mobile styles */
@media (max-width: 768px) {
    .navbar {
        min-height: 56px;
    }

    .navbar .container {
        min-height: 56px;
        padding: 0 var(--spacing-md);
    }

    .navbar-brand .navbar-item {
        font-size: 1.5rem;
        padding: var(--spacing-sm) 0;
    }

    .navbar-brand .navbar-item img {
        height: 28px;
        margin-right: 8px;
    }

    .navbar-brand .navbar-item span {
        font-size: 1.1rem;
    }

    /* Show mobile menu toggle */
    .navbar-burger {
        display: flex;
    }

    /* Hide desktop menu on mobile */
    .navbar-menu {
        display: none;
        position: fixed;
        top: 56px;
        left: 0;
        right: 0;
        background: rgba(255, 255, 255, 0.98);
        backdrop-filter: blur(15px);
        box-shadow: 0 8px 32px rgba(0,0,0,0.1);
        border-top: 1px solid rgba(102, 126, 234, 0.2);
        flex-direction: column;
        align-items: stretch;
        justify-content: flex-start;
        padding: var(--spacing-lg) 0;
        max-height: calc(100vh - 56px);
        overflow-y: auto;
    }

    /* Show mobile menu when active */
    .navbar-menu.is-active {
        display: flex;
        animation: slideDown 0.3s ease-out;
    }

    .navbar-end {
        flex-direction: column;
        align-items: stretch;
        gap: 0;
        width: 100%;
    }

    .navbar-item {
        padding: var(--spacing-md) var(--spacing-xl);
        margin: 0 var(--spacing-lg);
        border-radius: var(--radius-md);
        text-align: center;
        font-size: 1.1rem;
        border: 1px solid transparent;
    }

    .navbar-item:hover {
        background: rgba(102, 126, 234, 0.1);
        border-color: rgba(102, 126, 234, 0.3);
        transform: none;
    }

    .navbar-item.is-active::after,
    .navbar-item[aria-current="page"]::after {
        display: none;
    }

    .navbar-item.is-active,
    .navbar-item[aria-current="page"] {
        background: rgba(102, 126, 234, 0.15);
        border-color: var(--primary-color);
    }
}

/* Extra small screens */
@media (max-width: 480px) {
    .navbar .container {
        padding: 0 var(--spacing-sm);
    }

    .navbar-brand .navbar-item {
        font-size: 1.3rem;
    }

    .navbar-brand .navbar-item span {
        font-size: 1rem;
    }

    .navbar-item {
        padding: var(--spacing-sm) var(--spacing-lg);
        margin: 0 var(--spacing-md);
        font-size: 1rem;
    }
}

/* Accessibility improvements */
@media (prefers-reduced-motion: reduce) {
    .navbar,
    .navbar-item,
    .navbar-burger,
    .navbar-burger span,
    .navbar-menu {
        transition: none;
        animation: none;
    }
}

/* High contrast mode support */
@media (prefers-contrast: high) {
    .navbar {
        background: white;
        border-bottom: 2px solid black;
    }

    .navbar-item {
        border: 1px solid transparent;
    }

    .navbar-item:hover,
    .navbar-item:focus {
        border-color: black;
        background: #f0f0f0;
    }

    .navbar-burger span {
        background: black;
    }
}

/* Animations */
@keyframes slideDown {
    from {
        opacity: 0;
        transform: translateY(-20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Focus visible for better keyboard navigation */
.navbar-item:focus-visible,
.navbar-burger:focus-visible {
    outline: none;
}

/* Print styles */
@media print {
    .navbar {
        display: none;
    }
}

/* Navbar scroll effect (enhanced) */
.navbar.scrolled {
    background: rgba(255, 255, 255, 0.98);
    box-shadow: 0 2px 20px rgba(0,0,0,0.15);
}

/* Logo fade effect on scroll */
.navbar.scrolled .navbar-brand .navbar-item img {
    opacity: 0.9;
}

/* Sticky behavior for older browsers */
.navbar.sticky {
    position: -webkit-sticky;
    position: sticky;
    top: 0;
}

/* Custom scrollbar for mobile menu if needed */
.navbar-menu::-webkit-scrollbar {
    width: 4px;
}

.navbar-menu::-webkit-scrollbar-track {
    background: transparent;
}

.navbar-menu::-webkit-scrollbar-thumb {
    background: rgba(102, 126, 234, 0.3);
    border-radius: 2px;
}

.navbar-menu::-webkit-scrollbar-thumb:hover {
    background: rgba(102, 126, 234, 0.5);
}


/* ========================================
   Hero Sections
   ======================================== */

.hero,
.book-list-hero,
.collections-hero,
.collection-hero,
.error-hero {
    background: var(--primary-gradient);
    position: relative;
    overflow: hidden;
    padding: 120px 0 80px;
}

.hero::before,
.book-list-hero::before,
.collections-hero::before,
.collection-hero::before,
.error-hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><circle cx="20" cy="20" r="2" fill="rgba(255,255,255,0.1)"/><circle cx="80" cy="40" r="1.5" fill="rgba(255,255,255,0.08)"/><circle cx="40" cy="70" r="1" fill="rgba(255,255,255,0.06)"/><circle cx="70" cy="80" r="2.5" fill="rgba(255,255,255,0.05)"/></svg>');
    animation: float 20s ease-in-out infinite;
}

.hero-content,
.collections-hero-content,
.error-content {
    position: relative;
    z-index: 2;
    text-align: center;
}

.hero-title,
.collections-hero-title,
.error-title {
    font-size: 3.5rem;
    font-weight: bold;
    color: white;
    text-shadow: var(--text-shadow);
    margin-bottom: 1.5rem;
    animation: fadeInUp 1s ease-out;
}

.hero-subtitle,
.collections-hero-subtitle,
.error-message {
    font-size: 1.3rem;
    color: rgba(255, 255, 255, 0.9);
    text-shadow: var(--text-shadow);
    margin-bottom: 2rem;
    animation: fadeInUp 1s ease-out 0.2s both;
}

.hero-buttons,
.error-actions {
    animation: fadeInUp 1s ease-out 0.4s both;
    display: flex;
    gap: var(--spacing-lg);
    justify-content: center;
    flex-wrap: wrap;
}

.hero-button,
.error-button {
    background: var(--secondary-gradient);
    border: none;
    color: var(--text-primary);
    font-weight: bold;
    padding: var(--spacing-md) var(--spacing-xl);
    border-radius: var(--radius-round);
    font-size: 1.1rem;
    box-shadow: var(--card-shadow);
    transition: all var(--transition-normal);
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    min-width: 160px;
    justify-content: center;
}

.hero-button:hover,
.error-button:hover {
    transform: translateY(-3px);
    box-shadow: var(--hover-shadow);
    color: var(--text-primary);
}

.hero-button.is-outlined,
.error-button.is-outlined {
    background: transparent;
    color: white;
    border: 2px solid white;
}

.hero-button.is-outlined:hover,
.error-button.is-outlined:hover {
    background: white;
    color: var(--primary-color);
}

/* ========================================
   Section Styles
   ======================================== */

.main-content,
.books-section,
.results-section {
    background: linear-gradient(to bottom, transparent, rgba(255,255,255,0.1));
    padding: 60px 0;
    min-height: 50vh;
}

.collections-main {
    background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
    padding: 60px 0;
    min-height: 60vh;
}

.section-title,
.related-title {
    font-size: 2.5rem;
    font-weight: bold;
    color: white;
    text-align: center;
    text-shadow: var(--text-shadow);
    margin-bottom: 3rem;
}

.section-title.has-text-dark,
.related-title.has-text-dark {
    color: var(--text-primary);
    text-shadow: none;
}

/* ========================================
   Search & Filters
   ======================================== */

.search-filters-section {
    background: white;
    padding: var(--spacing-xxl) 0;
    box-shadow: 0 2px 20px rgba(0,0,0,0.05);
    border-bottom: 1px solid var(--border-color);
}

.filter-controls {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-lg);
    align-items: center;
    justify-content: center;
    max-width: 1000px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
}

.search-box {
    flex: 1;
    min-width: 300px;
    max-width: 400px;
    position: relative;
}

.search-input {
    width: 100%;
    padding: var(--spacing-md) 50px var(--spacing-md) var(--spacing-lg);
    border: 2px solid var(--border-color);
    border-radius: var(--radius-round);
    font-size: 1rem;
    transition: all var(--transition-normal);
    background: var(--bg-light);
    font-family: inherit;
}

.search-input:focus {
    outline: none;
    border-color: var(--primary-color);
    background: white;
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

.search-input::placeholder {
    color: var(--text-secondary);
    opacity: 0.8;
}

.search-button {
    position: absolute;
    right: 5px;
    top: 50%;
    transform: translateY(-50%);
    background: var(--accent-gradient);
    border: none;
    color: white;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    cursor: pointer;
    transition: all var(--transition-normal);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.9rem;
}

.search-button:hover {
    transform: translateY(-50%) scale(1.05);
    box-shadow: 0 5px 15px rgba(102, 126, 234, 0.3);
}

.sort-selector {
    position: relative;
}

.sort-select {
    padding: 12px 40px 12px 16px;
    border: 2px solid var(--border-color);
    border-radius: var(--radius-xl);
    background: var(--bg-light);
    font-size: 0.9rem;
    font-weight: 500;
    transition: all var(--transition-normal);
    cursor: pointer;
    appearance: none;
    -webkit-appearance: none;
    -moz-appearance: none;
    min-width: 150px;
    font-family: inherit;
    color: var(--text-primary);
}

.sort-select:focus {
    outline: none;
    border-color: var(--primary-color);
    background: white;
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

.sort-selector::after {
    content: '\f078';
    font-family: 'Font Awesome 6 Free';
    font-weight: 900;
    position: absolute;
    right: 12px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-secondary);
    pointer-events: none;
    font-size: 0.8rem;
}

.view-toggle {
    display: flex;
    background: white;
    border: 2px solid var(--border-color);
    border-radius: var(--radius-xl);
    overflow: hidden;
    box-shadow: 0 2px 8px rgba(0,0,0,0.05);
}

.view-btn {
    padding: 12px var(--spacing-md);
    border: none;
    background: transparent;
    cursor: pointer;
    transition: all var(--transition-normal);
    color: var(--text-secondary);
    font-size: 1rem;
    min-width: 45px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.view-btn.active {
    background: var(--primary-color);
    color: white;
}

.view-btn:hover:not(.active) {
    background: var(--bg-light);
    color: var(--text-primary);
}

.clear-search {
    background: transparent;
    border: 2px solid var(--error-color);
    color: var(--error-color);
    padding: 12px var(--spacing-lg);
    border-radius: var(--radius-xl);
    font-size: 0.9rem;
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition-normal);
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.clear-search:hover {
    background: var(--error-color);
    color: white;
    text-decoration: none;
}

/* ========================================
   Grid Layouts
   ======================================== */

.books-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-xl);
    padding: 0 var(--spacing-lg);
}

.collections-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: var(--spacing-xl);
    margin-top: var(--spacing-xxl);
}

.categories-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-lg);
    padding: 0 var(--spacing-lg);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-xxl);
    padding: 0 var(--spacing-lg);
}

.related-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 25px;
}

/* ========================================
   Card Components
   ======================================== */

.book-card {
    background: white;
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--card-shadow);
    transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    cursor: pointer;
    position: relative;
}

.book-card:hover {
    transform: translateY(-10px) scale(1.02);
    box-shadow: var(--hover-shadow);
}

.book-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--accent-gradient);
    opacity: 0;
    transition: opacity var(--transition-normal);
    z-index: 1;
}

.book-card:hover::before {
    opacity: 0.05;
}

.book-cover {
    width: 100%;
    height: 200px;
    object-fit: cover;
    transition: transform var(--transition-normal);
}

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

.book-info {
    padding: var(--spacing-lg);
    position: relative;
    z-index: 2;
}

.book-title {
    font-size: 1.3rem;
    font-weight: bold;
    color: var(--text-primary);
    margin-bottom: var(--spacing-sm);
    line-height: 1.3;
    height: 54px;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.book-author {
    color: var(--text-muted);
    font-size: 0.9rem;
    margin-bottom: var(--spacing-sm);
}

.book-description {
    color: var(--text-secondary);
    font-size: 0.9rem;
    line-height: 1.5;
    margin-bottom: var(--spacing-md);
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.book-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-md);
}

.book-category,
.book-collection {
    background: var(--secondary-gradient);
    color: var(--text-primary);
    padding: 4px 12px;
    border-radius: var(--spacing-md);
    font-size: 0.8rem;
    font-weight: 500;
}

.book-language {
    color: var(--accent-color);
    font-size: 0.8rem;
    font-weight: 500;
}

.book-actions {
    display: flex;
    gap: var(--spacing-sm);
}

.action-btn {
    flex: 1;
    padding: var(--spacing-sm);
    border: none;
    border-radius: var(--radius-xl);
    font-weight: 500;
    transition: all var(--transition-normal);
    cursor: pointer;
    font-size: 0.9rem;
    text-decoration: none;
    text-align: center;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-xs);
}

.read-btn {
    background: var(--accent-gradient);
    color: white;
}

.read-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(116, 185, 255, 0.4);
    color: white;
}

.preview-btn {
    background: transparent;
    color: var(--accent-color);
    border: 2px solid var(--accent-color);
}

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

/* Collection Cards */
.collection-card {
    background: white;
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    text-align: center;
    text-decoration: none;
    color: inherit;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    transition: all var(--transition-normal);
    border: 2px solid transparent;
    position: relative;
    overflow: hidden;
    display: block;
}

.collection-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(45deg, var(--primary-color), var(--secondary-color));
    transform: translateX(-100%);
    transition: transform var(--transition-normal);
}

.collection-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.15);
    border-color: var(--primary-color);
    text-decoration: none;
    color: inherit;
}

.collection-card:hover::before {
    transform: translateX(0);
}

.collection-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto var(--spacing-lg);
    background: var(--primary-gradient);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 8px 20px rgba(102, 126, 234, 0.3);
}

.collection-icon i {
    font-size: 2rem;
    color: white;
}

.collection-name {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 12px;
    color: var(--text-primary);
    line-height: 1.3;
}

.collection-stats {
    display: flex;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-md);
    padding: 12px var(--spacing-md);
    border-radius: var(--spacing-sm);
    flex-wrap: wrap;
}

.collection-count {
    font-size: 0.9rem;
    color: var(--primary-color);
    font-weight: 600;
}

.collection-categories {
    font-size: 0.9rem;
    color: var(--text-secondary);
    font-weight: 500;
}

.collection-description {
    font-size: 0.95rem;
    color: rgba(255, 255, 255, 0.9);
    line-height: 1.6;
    margin-bottom: var(--spacing-lg);
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.collection-action {
    background: var(--primary-gradient);
    color: white;
    padding: 12px 24px;
    border-radius: var(--radius-xl);
    font-size: 0.9rem;
    font-weight: 600;
    display: inline-block;
    transition: all var(--transition-normal);
    text-decoration: none;
}

.collection-action:hover {
    background: linear-gradient(135deg, #5a6fd8, #6a42a0);
    color: white;
    text-decoration: none;
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(102, 126, 234, 0.4);
}

.collections-grid .collection-stats {
    justify-content: space-between;
}

.collections-grid .collection-description {
    color: var(--text-secondary);
}

/* Feature Cards */
.feature-card {
    background: white;
    padding: var(--spacing-xxl) var(--spacing-xl);
    border-radius: var(--radius-lg);
    text-align: center;
    box-shadow: var(--card-shadow);
    transition: all var(--transition-normal);
}

.feature-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--hover-shadow);
}

.feature-icon {
    width: 80px;
    height: 80px;
    background: var(--accent-gradient);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto var(--spacing-lg);
    font-size: 2rem;
    color: white;
}

.feature-title {
    font-size: 1.4rem;
    font-weight: bold;
    color: var(--text-primary);
    margin-bottom: var(--spacing-md);
}

.feature-description {
    color: var(--text-secondary);
    line-height: 1.6;
}

/* Category Cards */
.category-card {
    background: white;
    padding: var(--spacing-xl) var(--spacing-lg);
    border-radius: var(--spacing-md);
    text-align: center;
    box-shadow: var(--card-shadow);
    transition: all var(--transition-normal);
    cursor: pointer;
    text-decoration: none;
    color: inherit;
}

.category-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--hover-shadow);
    color: inherit;
}

.category-icon {
    font-size: 2.5rem;
    color: var(--accent-color);
    margin-bottom: var(--spacing-md);
}

.category-name {
    font-size: 1.1rem;
    font-weight: bold;
    color: var(--text-primary);
    margin-bottom: var(--spacing-xs);
}

.category-count {
    color: var(--text-muted);
    font-size: 0.9rem;
}

/* ========================================
   Special Sections
   ======================================== */

.collections-section {
    padding: 60px 0;
    background: linear-gradient(135deg, var(--bg-light) 0%, #e9ecef 100%);
}

.categories-section {
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    padding: 60px 0;
    margin: 60px 0;
}

.features-section {
    padding: 80px 0;
}

.collections-stats,
.stats-section {
    background: var(--primary-color);
    color: white;
    padding: var(--spacing-xxl) 0;
    margin-bottom: 0;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-xl);
    text-align: center;
}

.stat-card {
    padding: var(--spacing-lg);
    background: rgba(255, 255, 255, 0.1);
    border-radius: var(--spacing-md);
    backdrop-filter: blur(10px);
}

.stat-number {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 8px;
    display: block;
}

.stat-label {
    font-size: 1rem;
    opacity: 0.9;
}

/* ========================================
   Breadcrumb Navigation
   ======================================== */

.breadcrumb-section {
    background: white;
    padding: var(--spacing-lg) 0;
    border-bottom: 1px solid #e9ecef;
}

.breadcrumb {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    font-size: 0.95rem;
}

.breadcrumb a {
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 500;
    transition: color var(--transition-normal);
}

.breadcrumb a:hover {
    color: #5a6fd8;
    text-decoration: underline;
}

.breadcrumb-separator {
    color: var(--text-secondary);
    font-size: 0.8rem;
}

.breadcrumb-current {
    color: var(--text-primary);
    font-weight: 600;
}

/* ========================================
   Pagination
   ======================================== */

.pagination-section {
    background: white;
    padding: var(--spacing-xl) 0;
    box-shadow: 0 -2px 10px rgba(0,0,0,0.1);
}

.pagination-container {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: var(--spacing-lg);
}

.pagination-btn {
    background: var(--accent-gradient);
    color: white;
    padding: 12px var(--spacing-lg);
    border-radius: var(--radius-xl);
    text-decoration: none;
    font-weight: 500;
    transition: all var(--transition-normal);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.pagination-btn:hover:not(.disabled) {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(116, 185, 255, 0.4);
    color: white;
}

.pagination-btn.disabled {
    background: #95a5a6;
    cursor: not-allowed;
    opacity: 0.6;
}

.pagination-info {
    color: var(--text-primary);
    font-weight: 500;
    font-size: 1rem;
}

/* ========================================
   State Components
   ======================================== */

.empty-state {
    text-align: center;
    padding: 60px var(--spacing-lg);
    color: white;
}

.empty-state i {
    font-size: 4rem;
    margin-bottom: var(--spacing-lg);
    opacity: 0.6;
}

.empty-state h3 {
    font-size: 1.5rem;
    margin-bottom: var(--spacing-sm);
    color: inherit;
}

.empty-state p {
    opacity: 0.8;
    margin-bottom: 25px;
    line-height: 1.6;
}

.loading-state {
    text-align: center;
    padding: 60px var(--spacing-lg);
    color: var(--text-secondary);
}

.loading-spinner {
    width: 40px;
    height: 40px;
    border: 4px solid #f3f3f3;
    border-top: 4px solid var(--primary-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin: 0 auto var(--spacing-lg);
}

/* Active Filters */
.active-filters {
    display: flex;
    gap: 12px;
    margin-bottom: 25px;
    flex-wrap: wrap;
}

.active-filter {
    background: var(--primary-color);
    color: white;
    padding: 8px 16px;
    border-radius: var(--spacing-lg);
    font-size: 0.85rem;
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-weight: 500;
}

.active-filter .remove {
    cursor: pointer;
    font-weight: bold;
    width: 20px;
    height: 20px;
    background: rgba(255,255,255,0.2);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background var(--transition-fast);
}

.active-filter .remove:hover {
    background: rgba(255,255,255,0.3);
}

/* Results Info */
.results-info,
.results-count {
    text-align: center;
    margin-bottom: var(--spacing-xl);
    padding: var(--spacing-md) var(--spacing-lg);
    background: rgba(102, 126, 234, 0.05);
    border-radius: var(--spacing-sm);
    color: var(--text-primary);
    font-size: 1rem;
}

.results-info .highlight,
.results-count .highlight {
    color: var(--primary-color);
    font-weight: 700;
}

.results-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-xl);
    flex-wrap: wrap;
    gap: var(--spacing-md);
}

/* ========================================
   Footer
   ======================================== */

.footer {
    background: rgba(44, 62, 80, 0.95);
    color: white;
    padding: var(--spacing-xxl) 0 var(--spacing-lg);
    backdrop-filter: blur(10px);
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-xxl);
    padding: 0 var(--spacing-lg);
}

.footer-section h3 {
    color: var(--accent-color);
    margin-bottom: var(--spacing-md);
    font-size: 1.2rem;
}

.footer-section p,
.footer-section a {
    color: rgba(255, 255, 255, 0.8);
    line-height: 1.6;
    text-decoration: none;
}

.footer-section a:hover {
    color: var(--accent-color);
}

.social-links {
    display: flex;
    gap: var(--spacing-md);
    margin-top: var(--spacing-md);
}

.social-link {
    width: 40px;
    height: 40px;
    background: var(--accent-color);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    text-decoration: none;
    transition: all var(--transition-normal);
}

.social-link:hover {
    background: #0984e3;
    transform: translateY(-2px);
    color: white;
}

.footer-bottom {
    text-align: center;
    padding-top: var(--spacing-lg);
    margin-top: var(--spacing-lg);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    color: rgba(255, 255, 255, 0.6);
}

/* ========================================
   Collection Detail Specific
   ======================================== */

.collection-header {
    position: relative;
    z-index: 2;
    display: grid;
    grid-template-columns: auto 1fr;
    gap: var(--spacing-xl);
    align-items: center;
    max-width: 1000px;
    margin: 0 auto;
}

.collection-icon-large {
    width: 120px;
    height: 120px;
    background: rgba(255, 255, 255, 0.15);
    backdrop-filter: blur(10px);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 3rem;
    color: white;
    box-shadow: 0 20px 40px rgba(0,0,0,0.2);
    border: 3px solid rgba(255,255,255,0.2);
}

.collection-info h1 {
    color: white;
    font-size: 2.8rem;
    font-weight: bold;
    text-shadow: 0 2px 4px rgba(0,0,0,0.3);
    margin-bottom: var(--spacing-md);
    line-height: 1.2;
}

.collection-subtitle {
    color: rgba(255, 255, 255, 0.9);
    font-size: 1.2rem;
    margin-bottom: var(--spacing-lg);
    text-shadow: 0 1px 2px rgba(0,0,0,0.2);
    line-height: 1.4;
}

.collection-stat {
    background: rgba(255, 255, 255, 0.15);
    backdrop-filter: blur(10px);
    padding: var(--spacing-md) var(--spacing-lg);
    border-radius: var(--spacing-md);
    text-align: center;
    border: 1px solid rgba(255,255,255,0.3);
    box-shadow: 0 4px 15px rgba(0,0,0,0.1);
}

.collection-stat-number {
    font-size: 1.8rem;
    font-weight: bold;
    color: white;
    display: block;
    line-height: 1;
    text-shadow: 0 2px 4px rgba(0,0,0,0.3);
}

.collection-stat-label {
    font-size: 0.9rem;
    color: rgba(255, 255, 255, 0.9);
    margin-top: 5px;
    text-shadow: 0 1px 2px rgba(0,0,0,0.3);
}

/* Related Collections */
.related-collections {
    background: var(--bg-light);
    padding: 60px 0;
    border-top: 1px solid #e9ecef;
}

.related-collection-card {
    background: white;
    padding: 25px;
    border-radius: var(--spacing-md);
    text-decoration: none;
    color: inherit;
    box-shadow: 0 5px 15px rgba(0,0,0,0.1);
    transition: all var(--transition-normal);
    display: block;
    text-align: center;
}

.related-collection-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 25px rgba(0,0,0,0.15);
    color: inherit;
    text-decoration: none;
}

.related-collection-icon {
    width: 60px;
    height: 60px;
    background: var(--accent-gradient);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto var(--spacing-md);
    color: white;
    font-size: 1.5rem;
}

.related-collection-name {
    font-size: 1.2rem;
    font-weight: bold;
    margin-bottom: 8px;
    color: var(--text-primary);
}

.related-collection-count {
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-bottom: var(--spacing-sm);
}

.related-collection-desc {
    color: var(--text-secondary);
    font-size: 0.85rem;
    line-height: 1.4;
}

/* ========================================
   Error Page Specific
   ======================================== */

.error-hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding: 120px 0 80px;
}

.error-code {
    font-size: 8rem;
    font-weight: 900;
    color: white;
    text-shadow: var(--text-shadow);
    margin-bottom: 1rem;
    line-height: 1;
    animation: fadeInUp 1s ease-out;
}

.error-icon {
    font-size: 4rem;
    color: rgba(255, 255, 255, 0.8);
    margin-bottom: 2rem;
    animation: fadeInUp 1s ease-out 0.1s both;
}

.suggestions-section {
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    padding: 60px 0;
    margin-top: -80px;
    position: relative;
    z-index: 3;
}

.suggestions-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-xl);
    margin-top: var(--spacing-xxl);
}

.suggestion-card {
    background: white;
    padding: var(--spacing-xl) var(--spacing-lg);
    border-radius: var(--spacing-md);
    text-align: center;
    box-shadow: var(--card-shadow);
    transition: all var(--transition-normal);
    text-decoration: none;
    color: inherit;
    display: block;
}

.suggestion-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--hover-shadow);
    color: inherit;
    text-decoration: none;
}

.suggestion-icon {
    font-size: 2.5rem;
    color: var(--accent-color);
    margin-bottom: var(--spacing-md);
}

.suggestion-title {
    font-size: 1.2rem;
    font-weight: bold;
    color: var(--text-primary);
    margin-bottom: var(--spacing-sm);
}

.suggestion-description {
    color: var(--text-muted);
    font-size: 0.9rem;
    line-height: 1.5;
}

/* ========================================
   Utility Classes
   ======================================== */

.has-text-centered {
    text-align: center;
}

.has-text-dark {
    color: var(--text-primary) !important;
}

.has-text-white {
    color: white !important;
}

.mt-6 {
    margin-top: 1.5rem;
}

.subtitle {
    font-size: 1.1rem;
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
}

.button {
    background: var(--accent-gradient);
    color: white;
    border: none;
    padding: 12px 24px;
    border-radius: var(--radius-xl);
    font-weight: 600;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    transition: all var(--transition-normal);
    cursor: pointer;
    font-family: inherit;
    font-size: 1rem;
}

.button.is-large {
    padding: var(--spacing-md) var(--spacing-xl);
    font-size: 1.1rem;
}

.button.is-primary {
    background: var(--primary-gradient);
}

.button:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(102, 126, 234, 0.4);
    color: white;
    text-decoration: none;
}

.back-btn {
    position: fixed;
    top: 80px;
    left: var(--spacing-lg);
    background: rgba(255, 255, 255, 0.9);
    color: var(--primary-color);
    border: none;
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--radius-xl);
    cursor: pointer;
    font-size: 14px;
    font-weight: 500;
    text-decoration: none;
    transition: all var(--transition-normal);
    box-shadow: 0 5px 15px rgba(0,0,0,0.1);
    backdrop-filter: blur(10px);
    z-index: 1000;
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.back-btn:hover {
    background: white;
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(0,0,0,0.15);
    color: var(--primary-color);
    text-decoration: none;
}

/* ========================================
   Custom Scrollbar
   ======================================== */

::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: rgba(255, 255, 255, 0.1);
}

::-webkit-scrollbar-thumb {
    background: rgba(255, 255, 255, 0.3);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: rgba(255, 255, 255, 0.5);
}

/* ========================================
   Animations
   ======================================== */

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes float {
    0%, 100% {
        transform: translateY(0px) rotate(0deg);
    }
    50% {
        transform: translateY(-20px) rotate(180deg);
    }
}

@keyframes spin {
    0% {
        transform: rotate(0deg);
    }
    100% {
        transform: rotate(360deg);
    }
}

@keyframes pulse {
    0% {
        transform: scale(1);
    }
    50% {
        transform: scale(1.05);
    }
    100% {
        transform: scale(1);
    }
}

@keyframes collectionSlideIn {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Animation delays for staggered effects */
.collection-card:nth-child(1) { animation-delay: 0.1s; }
.collection-card:nth-child(2) { animation-delay: 0.2s; }
.collection-card:nth-child(3) { animation-delay: 0.3s; }
.collection-card:nth-child(4) { animation-delay: 0.4s; }
.collection-card:nth-child(5) { animation-delay: 0.5s; }
.collection-card:nth-child(6) { animation-delay: 0.6s; }
.collection-card:nth-child(7) { animation-delay: 0.7s; }
.collection-card:nth-child(8) { animation-delay: 0.8s; }

/* ========================================
   Responsive Design
   ======================================== */

@media (max-width: 1024px) {
    .container {
        padding: 0 var(--spacing-md);
    }

    .books-grid,
    .collections-grid {
        grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
        gap: 25px;
    }
}

@media (max-width: 768px) {
    /* Hero sections */
    .hero,
    .book-list-hero,
    .collections-hero,
    .collection-hero,
    .error-hero {
        padding: 120px 0 60px;
    }

    .hero-title,
    .collections-hero-title,
    .error-title {
        font-size: 2.5rem;
    }

    .hero-subtitle,
    .collections-hero-subtitle,
    .error-message {
        font-size: 1.1rem;
    }

    .error-code {
        font-size: 5rem;
    }

    .section-title,
    .related-title {
        font-size: 2rem;
    }

    /* Collection header */
    .collection-header {
        grid-template-columns: 1fr;
        text-align: center;
        gap: var(--spacing-lg);
    }

    .collection-icon-large {
        width: 80px;
        height: 80px;
        font-size: 2rem;
        margin: 0 auto;
    }

    .collection-info h1 {
        font-size: 2.2rem;
    }

    .collection-stats {
        justify-content: center;
        gap: var(--spacing-md);
        flex-wrap: wrap;
    }

    .collection-stat {
        padding: 12px var(--spacing-md);
    }

    /* Grids */
    .books-grid {
        grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
        gap: var(--spacing-lg);
        padding: 0 var(--spacing-md);
    }

    .collections-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-lg);
    }

    .categories-grid {
        grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    }

    .features-grid,
    .related-grid,
    .suggestions-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-xl);
    }

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

    .stat-number {
        font-size: 2rem;
    }

    /* Search filters */
    .search-filters-section {
        padding: 25px 0;
    }

    .filter-controls {
        flex-direction: column;
        gap: var(--spacing-md);
        padding: 0 var(--spacing-md);
    }

    .search-box {
        min-width: 100%;
        max-width: none;
        order: 1;
    }

    .sort-selector {
        width: 100%;
        order: 2;
    }

    .sort-select {
        width: 100%;
        min-width: auto;
    }

    .view-toggle {
        justify-self: center;
        order: 3;
    }

    .clear-search {
        order: 4;
        width: 100%;
        justify-content: center;
    }

    /* Hero buttons */
    .hero-buttons,
    .error-actions {
        flex-direction: column;
        align-items: center;
        padding: 0 var(--spacing-lg);
    }

    .hero-button,
    .error-button {
        width: 100%;
        max-width: 300px;
        margin: var(--spacing-sm) 0;
    }

    /* Results */
    .results-header {
        flex-direction: column;
        align-items: stretch;
        gap: var(--spacing-lg);
    }

    .results-info,
    .results-count {
        font-size: 0.9rem;
        padding: 12px var(--spacing-md);
    }

    /* Pagination */
    .pagination-container {
        flex-direction: column;
        gap: var(--spacing-md);
    }

    .pagination-btn {
        width: 100%;
        justify-content: center;
        max-width: 200px;
    }

    /* Cards */
    .collection-card {
        padding: 25px;
    }

    .collection-icon {
        width: 60px;
        height: 60px;
        margin-bottom: var(--spacing-md);
    }

    .collection-icon i {
        font-size: 1.5rem;
    }

    .collection-name {
        font-size: 1.3rem;
    }

    /* Back button */
    .back-btn {
        top: 70px;
        left: var(--spacing-sm);
        padding: 8px 12px;
        font-size: 12px;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 var(--spacing-sm);
    }

    .hero-title,
    .collections-hero-title,
    .error-title {
        font-size: 2rem;
    }

    .error-code {
        font-size: 4rem;
    }

    .section-title {
        font-size: 1.8rem;
    }

    .search-input {
        padding: 12px 45px 12px var(--spacing-md);
        font-size: 0.9rem;
    }

    .search-button {
        width: 35px;
        height: 35px;
        font-size: 0.8rem;
    }

    .sort-select {
        padding: var(--spacing-sm) 35px var(--spacing-sm) 12px;
        font-size: 0.85rem;
    }

    .view-btn {
        padding: var(--spacing-sm) 12px;
        font-size: 0.9rem;
    }

    .books-grid {
        padding: 0 var(--spacing-sm);
    }

    .book-title {
        font-size: 1.1rem;
        height: auto;
    }

    .action-btn {
        font-size: 0.8rem;
        padding: 8px;
    }
}

/* ========================================
   Focus States for Accessibility
   ======================================== */
.search-input:focus,
.sort-select:focus,
.view-btn:focus,
.clear-search:focus,
.book-card:focus,
.collection-card:focus,
.category-card:focus,
.feature-card:focus,
.suggestion-card:focus,
.related-collection-card:focus,
.pagination-btn:focus,
.button:focus,
.back-btn:focus {
    outline: 3px solid var(--accent-color);
    outline-offset: 2px;
}

/* ========================================
   Print Styles
   ======================================== */

@media print {
    .navbar,
    .search-filters-section,
    .pagination-section,
    .back-btn {
        display: none;
    }

    body {
        background: white;
        color: black;
    }

    .hero,
    .collections-hero,
    .book-list-hero {
        background: white;
        color: black;
        padding: var(--spacing-lg) 0;
    }

    .book-card,
    .collection-card {
        break-inside: avoid;
        box-shadow: none;
        border: 1px solid #ddd;
    }
}