/* Modern Cozy Indie Bookshop Design - Bookvibe - CLEANED & OPTIMIZED */

/* ================================
   CSS Variables - Consolidated
   ================================ */
:root {
    /* Color Palette */
    --primary-color: #2E5A8A;
    --primary-light: #4682B4;
    --primary-dark: #1E3A5F;
    --secondary-color: #2E5A8A;
    --text-color: #0F172A;
    --text-light: #475569;
    --text-muted: #64748B;
    --background-primary: #F0F8FF;
    --background-secondary: #E6F3FF;
    --background-light: #F8FCFF;
    --card-background: #FFFFFF;
    --border-color: #B0E0E6;
    --border-light: #E6F3FF;
    --success-color: #059669;
    --warning-color: #D97706;
    --error-color: #1B5E20;
    --danger-color: #1B5E20;
    
    /* Shadows */
    --shadow-xs: 0 1px 2px rgba(46, 90, 138, 0.05);
    --shadow-sm: 0 2px 8px rgba(0,0,0,0.08);
    --shadow-md: 0 4px 16px rgba(14, 165, 233, 0.08);
    --shadow-lg: 0 8px 30px rgba(0,0,0,0.12);
    --shadow-xl: 0 12px 40px rgba(0,0,0,0.15);
    
    /* Spacing */
    --space-xs: 0.25rem;
    --space-sm: 0.5rem;
    --space-md: 1rem;
    --space-lg: 1.5rem;
    --space-xl: 2rem;
    --space-2xl: 3rem;
    --space-3xl: 4rem;
    
    /* Border Radius */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --radius-2xl: 1.25rem;
    --radius-3xl: 1.5rem;
    --radius-full: 9999px;
    
    /* Typography */
    --font-size-xs: 0.75rem;
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-2xl: 1.5rem;
    --font-size-3xl: 1.875rem;
    --font-size-4xl: 2.25rem;
    --font-size-5xl: 3rem;
    
    /* Line Heights */
    --line-height-tight: 1.25;
    --line-height-normal: 1.5;
    --line-height-relaxed: 1.625;
}

/* ================================
   Global Styles
   ================================ */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: linear-gradient(135deg, #F0F8FF 0%, #E6F3FF 100%);
    background-attachment: fixed;
    color: var(--text-color);
    line-height: var(--line-height-relaxed);
    font-size: 16px;
    min-height: 100vh;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* ================================
   Typography
   ================================ */
h1, h2, h3, h4, h5, h6 {
    font-family: 'Playfair Display', serif;
    font-weight: 600;
    line-height: var(--line-height-tight);
    margin-bottom: var(--space-md);
    color: var(--text-color);
    letter-spacing: -0.02em;
}

h1 { font-size: var(--font-size-5xl); font-weight: 700; }
h2 { font-size: var(--font-size-4xl); }
h3 { font-size: var(--font-size-3xl); }
h4 { font-size: var(--font-size-2xl); font-weight: 500; }
h5 { font-size: var(--font-size-xl); font-weight: 500; }
h6 { font-size: var(--font-size-lg); font-weight: 500; }

p {
    font-size: var(--font-size-base);
    line-height: var(--line-height-relaxed);
    margin-bottom: var(--space-md);
}

/* Typography Utilities */
.text-xs { font-size: var(--font-size-xs); }
.text-sm { font-size: var(--font-size-sm); }
.text-base { font-size: var(--font-size-base); }
.text-lg { font-size: var(--font-size-lg); }
.text-xl { font-size: var(--font-size-xl); }
.text-2xl { font-size: var(--font-size-2xl); }
.text-3xl { font-size: var(--font-size-3xl); }
.text-4xl { font-size: var(--font-size-4xl); }
.text-5xl { font-size: var(--font-size-5xl); }

.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.font-medium { font-weight: 500; }
.font-semibold { font-weight: 600; }
.font-bold { font-weight: 700; }

.text-muted { color: var(--text-muted); }
.text-primary { color: var(--primary-color); }
.text-secondary { color: var(--text-light); }

.lh-sm { line-height: 1.4; }
.lh-lg { line-height: 1.7; }

/* ================================
   Layout - Mobile First
   ================================ */
.container {
    width: 100%;
    margin: 0 auto;
    padding: 0 1rem;
}

@media (min-width: 768px) {
    .container {
        padding: 0 1.5rem;
    }
}

@media (min-width: 1024px) {
.container {
    max-width: 1100px;
        padding: 0 2rem;
    }
}

.container-fluid {
    width: 100%;
    padding: 0 1rem;
}

@media (min-width: 768px) {
    .container-fluid {
        padding: 0 1.5rem;
    }
}

.main-content {
    min-height: calc(100vh - 120px);
    padding-top: var(--space-lg);
}

/* ================================
   Grid System - Mobile First
   ================================ */
.grid {
    display: grid;
    gap: 1rem;
}

.grid-cols-1,
.grid-cols-2,
.grid-cols-3,
.grid-cols-4,
.grid-cols-5,
.grid-cols-6 { 
    grid-template-columns: 1fr;
}

@media (min-width: 640px) {
    .grid-cols-2,
    .grid-cols-3,
    .grid-cols-4,
    .grid-cols-5,
    .grid-cols-6 { 
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }
}

@media (min-width: 1024px) {
.grid-cols-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.grid-cols-4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }
.grid-cols-5 { grid-template-columns: repeat(5, minmax(0, 1fr)); }
.grid-cols-6 { grid-template-columns: repeat(6, minmax(0, 1fr)); }
}

/* ================================
   Modern Navbar
   ================================ */
.navbar-modern {
    background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary-color) 100%);
    padding: 0.75rem 0;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.15);
    transition: all 0.3s ease;
    position: sticky;
    top: 0;
    z-index: 1000;
    backdrop-filter: blur(10px);
}

.navbar-modern.scrolled {
    box-shadow: 0 6px 30px rgba(0, 0, 0, 0.2);
    padding: 0.5rem 0;
}

/* Modern Brand */
.navbar-brand-modern {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    color: white !important;
    text-decoration: none;
    transition: all 0.3s ease;
    padding: 0.5rem 0;
}

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

.brand-icon {
    width: 40px;
    height: 40px;
    background: rgba(255, 255, 255, 0.15);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
    transition: all 0.3s ease;
}

.navbar-brand-modern:hover .brand-icon {
    background: rgba(255, 255, 255, 0.25);
    transform: rotate(5deg);
}

.brand-text {
    font-size: 1.5rem;
    font-weight: 800;
    letter-spacing: -0.5px;
    background: linear-gradient(135deg, #ffffff 0%, rgba(255, 255, 255, 0.8) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* Modern Nav Links */
.nav-link-modern {
    color: rgba(255, 255, 255, 0.9) !important;
    font-weight: 600;
    font-size: 0.95rem;
    padding: 0.5rem 1rem;
    border-radius: 10px;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    position: relative;
    text-decoration: none;
}

.nav-link-modern:hover {
    color: white !important;
    background: rgba(255, 255, 255, 0.15);
    transform: translateY(-2px);
}

.nav-link-modern.active {
    background: rgba(255, 255, 255, 0.2);
    color: white !important;
}

.nav-link-modern i {
    font-size: 1rem;
}

/* Modern Profile Avatar */
.profile-avatar-modern {
    width: 38px;
    height: 38px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.2);
    border: 2px solid rgba(255, 255, 255, 0.3);
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    transition: all 0.3s ease;
}

.profile-avatar-modern:hover {
    transform: scale(1.1);
    border-color: rgba(255, 255, 255, 0.5);
}

.profile-avatar-modern .avatar-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.profile-avatar-modern .avatar-text {
    color: white;
    font-size: 1rem;
    font-weight: 700;
}

.profile-name-modern {
    color: white;
    font-weight: 600;
    font-size: 0.95rem;
}

/* Modern Dropdown Menu */
.dropdown-menu-modern {
    border: none;
    border-radius: 16px;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.15);
    padding: 0.75rem;
    background: white;
    min-width: 240px;
    margin-top: 0.5rem !important;
}

.dropdown-header-modern {
    color: var(--text-color);
    font-weight: 700;
    font-size: 0.95rem;
    padding: 0.75rem 1rem;
    letter-spacing: 0.3px;
}

.dropdown-item-modern {
    padding: 0.75rem 1rem;
    color: var(--text-color);
    border-radius: 10px;
    transition: all 0.2s ease;
    display: flex;
    align-items: center;
    font-weight: 500;
    font-size: 0.95rem;
    text-decoration: none;
    margin-bottom: 0.25rem;
}

.dropdown-item-modern:hover {
    background: linear-gradient(135deg, rgba(46, 90, 138, 0.1) 0%, rgba(46, 90, 138, 0.15) 100%);
    color: var(--primary-color);
    transform: translateX(4px);
}

.dropdown-item-modern.text-danger {
    color: #dc3545;
}

.dropdown-item-modern.text-danger:hover {
    background: rgba(220, 53, 69, 0.1);
    color: #dc3545;
}

/* Mobile Navbar */
@media (max-width: 991px) {
    .navbar-collapse {
        background: rgba(255, 255, 255, 0.05);
        backdrop-filter: blur(10px);
        padding: 1rem;
        border-radius: 16px;
        margin-top: 1rem;
        border: 1px solid rgba(255, 255, 255, 0.1);
    }
    
    .nav-link-modern {
        margin-bottom: 0.25rem;
    }
    
    .navbar-nav.align-items-center {
        align-items: flex-start !important;
        margin-top: 0.5rem;
        padding-top: 0.5rem;
        border-top: 1px solid rgba(255, 255, 255, 0.1);
    }
    
    .brand-text {
        font-size: 1.25rem;
    }
    
    .brand-icon {
        width: 35px;
        height: 35px;
    }
}

/* Old navbar compatibility */
.navbar {
    transition: all 0.3s ease;
}

.profile-avatar {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    background: var(--secondary-color);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 0.875rem;
    font-weight: 700;
    border: 2px solid rgba(255, 255, 255, 0.2);
}

.profile-name {
    font-weight: 500;
    color: white;
}

/* ================================
   Dropdown Menu - Improved Design
   ================================ */
.dropdown-menu {
    border: 1px solid var(--border-color);
    border-radius: var(--radius-xl);
    box-shadow: 0 8px 32px rgba(46, 90, 138, 0.15);
    padding: 0.75rem;
    display: none;
    position: absolute;
    top: 100%;
    right: 0;
    left: auto;
    z-index: 1000;
    min-width: 240px;
    background: linear-gradient(135deg, #ffffff 0%, #f8f9fa 100%);
    backdrop-filter: blur(10px);
}

.dropdown-menu.show {
    display: block !important;
    animation: slideDown 0.2s ease-out;
}

@keyframes slideDown {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.dropdown-menu[data-bs-popper] {
    top: 100% !important;
    left: 0 !important;
    margin-top: 0.5rem;
}

.dropdown-menu-end {
    right: 0 !important;
    left: auto !important;
}

.dropdown-item {
    padding: 0.75rem 1rem;
    color: var(--text-color);
    transition: all 0.2s ease;
    display: flex;
    align-items: center;
    width: 100%;
    font-weight: 500;
    text-decoration: none;
    background-color: transparent;
    border: 0;
    border-radius: var(--radius-md);
    margin-bottom: 0.25rem;
}

.dropdown-item:hover {
    background: linear-gradient(135deg, rgba(46, 90, 138, 0.1) 0%, rgba(46, 90, 138, 0.15) 100%);
    color: var(--primary-color);
    transform: translateX(4px);
}

.dropdown-item.text-danger {
    color: var(--danger-color);
}

.dropdown-item.text-danger:hover {
    background: linear-gradient(135deg, rgba(27, 94, 32, 0.1) 0%, rgba(27, 94, 32, 0.15) 100%);
    color: var(--danger-color);
}

.dropdown-divider {
    border-color: var(--border-color);
    margin: 0.5rem 0;
}

.dropdown-header {
    color: var(--text-color);
    font-weight: 700;
    font-size: var(--font-size-sm);
    padding: 0.5rem 1rem;
    letter-spacing: 0.5px;
}

.dropdown-toggle::after {
    display: inline-block;
    margin-left: 0.5em;
    vertical-align: 0.2em;
    content: "";
    border-top: 0.35em solid;
    border-right: 0.35em solid transparent;
    border-bottom: 0;
    border-left: 0.35em solid transparent;
}

/* ================================
   Cards
   ================================ */
.card {
    background: var(--card-background);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-2xl);
    box-shadow: var(--shadow-sm);
    transition: all 0.3s ease;
    overflow: hidden;
    margin-bottom: 1rem;
}

.card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary-color);
}

.card-header {
    background: linear-gradient(135deg, #f8f9fa 0%, #fff 100%);
    border-bottom: 2px solid #e9ecef;
    padding: 1.5rem;
    font-weight: 600;
}

.card-body {
    padding: 1rem;
}

@media (min-width: 640px) {
    .card-body {
        padding: 1.25rem;
    }
}

@media (min-width: 768px) {
    .card-body {
        padding: 1.5rem;
    }
}

@media (min-width: 1024px) {
    .card-body {
        padding: 2rem;
    }
}

.card-footer {
    padding: var(--space-lg) var(--space-xl);
    border-top: 1px solid var(--border-color);
    background: var(--background-light);
}

/* ================================
   Buttons
   ================================ */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.625rem 1rem;
    border-radius: var(--radius-lg);
    font-weight: 600;
    font-size: var(--font-size-sm);
    text-decoration: none;
    border: none;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: var(--shadow-sm);
}

.btn:active {
    transform: scale(0.95) !important;
}

.btn:disabled {
    cursor: not-allowed;
    opacity: 0.6;
}

.btn-primary {
    background: var(--primary-color);
    color: white;
    box-shadow: 0 2px 8px rgba(46, 90, 138, 0.2);
}

.btn-primary:hover {
    background: var(--primary-light);
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(46, 90, 138, 0.3);
    color: white;
}

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

.btn-outline-primary:hover {
    background: var(--primary-color);
    color: white;
    transform: translateY(-2px);
}

.btn-outline-secondary {
    transition: all 0.3s ease;
}

.btn-outline-secondary:hover {
    transform: translateY(-2px);
}

.btn-sm {
    padding: 0.375rem 0.75rem;
    font-size: var(--font-size-xs);
}

.btn-lg {
    padding: 0.875rem 1.5rem;
    font-size: var(--font-size-lg);
}

@media (min-width: 640px) {
    .btn {
        padding: 0.75rem 1.25rem;
        font-size: 1rem;
    }
}

@media (min-width: 1024px) {
    .btn {
        padding: 0.875rem 1.5rem;
    }
}

/* ================================
   Forms
   ================================ */
.form-control, .form-select {
    width: 100%;
    padding: 0.75rem 1rem;
    border: 2px solid var(--border-color);
    border-radius: var(--radius-lg);
    font-size: 16px; /* Prevents zoom on iOS */
    background: var(--card-background);
    color: var(--text-color);
    transition: all 0.3s ease;
    line-height: var(--line-height-normal);
}

.form-control:focus, .form-select:focus {
    outline: none;
    border-color: var(--secondary-color);
    box-shadow: 0 0 0 3px rgba(135, 206, 235, 0.1);
    transform: translateY(-1px);
}

.form-control:hover, .form-select:hover {
    border-color: var(--primary-color);
}

.form-label {
    display: block;
    margin-bottom: var(--space-sm);
    font-weight: 600;
    color: var(--text-color);
    font-size: var(--font-size-sm);
}

.form-control-lg {
    padding: 0.75rem 1rem;
    font-size: 1rem;
    border-radius: 10px;
}

.form-control-lg:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 0.25rem rgba(46, 90, 138, 0.15);
}

textarea.form-control {
    resize: vertical;
    min-height: 80px;
}

textarea.form-control:focus {
    min-height: 120px;
    transition: min-height 0.3s ease;
}

/* ================================
   Alerts
   ================================ */
.alert {
    padding: 1rem 1.25rem;
    border-radius: var(--radius-lg);
    margin-bottom: var(--space-md);
    border: none;
    font-weight: 500;
}

.alert-success {
    background: linear-gradient(135deg, rgba(5, 150, 105, 0.1) 0%, rgba(16, 185, 129, 0.1) 100%);
    color: var(--success-color);
    border-left: 4px solid var(--success-color);
}

.alert-danger {
    background: linear-gradient(135deg, rgba(27, 94, 32, 0.1) 0%, rgba(46, 125, 50, 0.1) 100%);
    color: var(--danger-color);
    border-left: 4px solid var(--danger-color);
}

.alert-info {
    background: linear-gradient(135deg, rgba(46, 90, 138, 0.1) 0%, rgba(70, 130, 180, 0.1) 100%);
    color: var(--primary-color);
    border-left: 4px solid var(--primary-color);
}

.alert-warning {
    background: linear-gradient(135deg, rgba(217, 119, 6, 0.1) 0%, rgba(245, 158, 11, 0.1) 100%);
    color: var(--warning-color);
    border-left: 4px solid var(--warning-color);
}

/* ================================
   Toast Notifications
   ================================ */
.toast-container {
    z-index: 9999 !important;
}

.toast {
    min-width: 300px;
    box-shadow: 0 10px 40px rgba(0,0,0,0.2);
    border-radius: 10px !important;
    animation: slideInRight 0.3s ease-out;
}

@keyframes slideInRight {
    from {
        transform: translateX(100%);
        opacity: 0;
    }
    to {
        transform: translateX(0);
        opacity: 1;
    }
}

@media (max-width: 576px) {
    .toast {
        min-width: calc(100vw - 40px);
    }
}

/* ================================
   Hero Section - Enhanced
   ================================ */
.hero,
.hero-landing {
    padding: 2rem 0;
    position: relative;
    overflow: hidden;
    background: linear-gradient(135deg, rgba(135, 206, 235, 0.05) 0%, rgba(240, 248, 255, 0.1) 100%);
}

.hero-content {
    position: relative;
    z-index: 2;
}

.hero-title {
    font-size: 2rem;
    line-height: 1.2;
    font-weight: 800;
    color: var(--text-color);
    animation: fadeInUp 0.8s ease-out;
    letter-spacing: -0.03em;
}

.hero-subtitle {
    font-size: 1.1rem;
    color: var(--text-light);
    animation: fadeInUp 0.8s ease-out 0.2s both;
    line-height: 1.7;
    max-width: 600px;
}

.hero-cta-group {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
    animation: fadeInUp 0.8s ease-out 0.4s both;
    justify-content: center;
}

.hero-stats {
    animation: fadeInUp 0.8s ease-out 0.6s both;
}

.stat-item {
    text-align: center;
}

.stat-value {
    font-size: 2rem;
    font-weight: 800;
    color: var(--primary-color);
    line-height: 1;
    margin-bottom: 0.25rem;
}

.stat-label {
    font-size: 0.9rem;
    color: var(--text-muted);
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

/* Hero Illustration - No animations */
.hero-illustration {
    position: relative;
    height: 400px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.floating-books {
    display: none;
}

@media (max-width: 767px) {
    .hero-title {
        font-size: 1.75rem;
    }
    
    .hero-subtitle {
        font-size: 1rem;
    }
    
    .hero-cta-group {
        justify-content: center;
    }
    
    .stat-value {
        font-size: 1.5rem;
    }
}

@media (min-width: 640px) {
    .hero,
    .hero-landing {
        padding: 3rem 0;
    }
    .hero-title {
        font-size: 2.5rem;
    }
    .hero-subtitle {
        font-size: 1.15rem;
    }
    
    .hero-cta-group {
        justify-content: flex-start;
    }
}

@media (min-width: 768px) {
    .hero,
    .hero-landing {
        padding: 4rem 0;
    }
    .hero-title {
        font-size: 3rem;
    }
    .hero-subtitle {
        font-size: 1.25rem;
    }
}

@media (min-width: 1024px) {
    .hero,
    .hero-landing {
        padding: 5rem 0;
    }
    .hero-title {
        font-size: 3.5rem;
    }
    .hero-subtitle {
        font-size: 1.35rem;
    }
}
    
/* ================================
   Book Detail Page
   ================================ */
.book-detail-cover {
        max-width: 100%;
    height: auto;
    max-height: 500px;
    object-fit: cover;
    transition: transform 0.3s ease;
}

.book-detail-cover:hover {
    transform: scale(1.02);
}

.book-cover-placeholder-large {
    min-height: 400px;
    background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
}

.star-rating-large i {
    font-size: 1.5rem;
    margin-right: 0.25rem;
}

.info-item {
    transition: all 0.3s ease;
    border: 1px solid transparent;
}

.info-item:hover {
    background: white !important;
    border-color: var(--secondary-color);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(135, 206, 235, 0.2);
}

.add-to-shelf-section {
    transition: all 0.3s ease;
}

.add-to-shelf-section:hover {
    background: white !important;
    border-color: var(--secondary-color);
}

.review-card {
    transition: all 0.3s ease;
    scroll-margin-top: 100px;
}

.hover-shadow-lg:hover {
    box-shadow: 0 10px 30px rgba(0,0,0,0.15) !important;
    transform: translateY(-2px);
}

@media (min-width: 992px) {
    .sticky-top {
        position: sticky;
        top: 100px;
        z-index: 10;
    }
}

@media (max-width: 767px) {
    .book-detail-cover {
        max-height: 350px;
    }
    
    .book-cover-placeholder-large {
        min-height: 300px;
    }
    
    .star-rating-large i {
        font-size: 1.25rem;
    }
}

/* ================================
   Review & Comment System
   ================================ */
.comment-item {
    transition: all 0.2s ease;
}

.comment-item:hover {
    background-color: #f0f5ff !important;
}

.reply-item {
    transition: all 0.2s ease;
}

.reply-item:hover {
    background-color: #f8f9fa !important;
}

.comment-form, .reply-form {
    animation: slideDown 0.3s ease-out;
}

@keyframes slideDown {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
    }
    
    .review-vote-buttons .btn {
    transition: all 0.2s ease;
}

.review-vote-buttons .btn:hover {
    transform: scale(1.05);
}

/* ================================
   Profile Pages
   ================================ */
.profile-picture-wrapper {
    transition: transform 0.3s ease;
}

.profile-picture-wrapper:hover {
    transform: scale(1.05);
}

.stat-box {
    transition: all 0.3s ease;
}

.stat-box:hover {
    background: white !important;
    border-color: var(--secondary-color);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(135, 206, 235, 0.2);
}

.stat-card {
    transition: all 0.3s ease;
}

.stat-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 15px rgba(0,0,0,0.1);
}

.review-item {
    transition: all 0.3s ease;
}

.review-item:hover {
    background-color: #f8f9fa;
    border-radius: 0.5rem;
    padding-left: 0.5rem;
    padding-right: 0.5rem;
}

/* ================================
   Reading Lists
   ================================ */
.reading-categories-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: var(--space-lg);
    margin-top: var(--space-xl);
    align-items: start;
}

@media (min-width: 768px) {
    .reading-categories-grid {
        grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    }
}

@media (min-width: 1024px) {
    .reading-categories-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

.reading-category-section {
    background: var(--card-background);
    border-radius: var(--radius-2xl);
    box-shadow: var(--shadow-md);
    border: 1px solid var(--border-color);
    overflow: hidden;
    transition: all 0.3s ease;
    display: flex;
    flex-direction: column;
    height: fit-content;
    min-height: 400px;
    margin-bottom: 2rem;
}

.reading-category-section:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-xl);
    border-color: var(--primary-color);
}

.category-header {
    background: linear-gradient(135deg, #f8f9fa 0%, #fff 100%);
    padding: var(--space-lg);
    border-bottom: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.category-title {
    font-size: var(--font-size-xl);
    font-weight: 700;
    color: var(--text-color);
    margin: 0;
}

.book-count {
    background: var(--primary-color);
    color: white;
    padding: var(--space-xs) var(--space-sm);
    border-radius: var(--radius-full);
    font-size: var(--font-size-sm);
    font-weight: 600;
}

.books-grid {
    padding: var(--space-lg);
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
    gap: var(--space-md);
    flex-grow: 1;
    min-height: 200px;
}

@media (min-width: 640px) {
    .books-grid {
        grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
    }
}

@media (min-width: 768px) {
    .books-grid {
        grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
    }
}

@media (min-width: 1024px) {
    .books-grid {
        grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
    }
}

.book-card {
    background: var(--background-light);
    border-radius: var(--radius-xl);
    padding: var(--space-sm);
    border: 1px solid var(--border-color);
    transition: all 0.3s ease;
    display: flex;
    flex-direction: column;
    height: fit-content;
    margin-bottom: 1rem;
}

.book-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
    border-color: var(--primary-color);
}

.book-cover {
    width: 100%;
    max-width: 100px;
    height: 110px;
    max-height: 110px;
    object-fit: cover;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
}

.book-cover-placeholder {
    width: 100%;
    max-width: 100px;
    height: 110px;
    background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto;
}

.empty-state {
    text-align: center;
    padding: var(--space-xl);
    color: var(--text-color);
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    flex-grow: 1;
    min-height: 200px;
    animation: fadeIn 0.5s ease-out;
}

@media (max-width: 768px) {
    .reading-categories-grid {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }
    
    .reading-category-section {
        min-height: 300px;
    }
    
    .books-grid {
        grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
        gap: 0.75rem;
        padding: 1rem;
        min-height: 150px;
    }
    
    .book-card {
        padding: 0.6rem;
    }
    
    .book-cover {
        max-width: 90px;
        height: 100px;
        max-height: 100px;
    }
}

@media (min-width: 640px) {
    .book-cover {
        max-height: 110px;
    }
}

@media (min-width: 1024px) {
    .book-cover {
        max-height: 110px;
    }
}

/* ================================
   Modern Footer - Responsive
   ================================ */
.footer-modern-new {
    background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary-color) 100%);
    color: white;
    padding: 3.5rem 0 1.5rem;
    margin-top: 5rem;
    position: relative;
    overflow: hidden;
    box-shadow: 0 -4px 20px rgba(0, 0, 0, 0.15);
}

.footer-modern-new::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, 
        rgba(255,255,255,0.3) 0%, 
        rgba(255,255,255,0.6) 50%, 
        rgba(255,255,255,0.3) 100%);
}

.footer-main-content {
    display: grid;
    grid-template-columns: 1.5fr 1fr;
    gap: 3rem;
    margin-bottom: 2.5rem;
}

/* Brand Section */
.footer-brand-section {
    max-width: 500px;
}

.footer-brand {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-bottom: 1.25rem;
    font-size: 1.75rem;
    font-weight: 800;
}

.footer-brand i {
    font-size: 2rem;
    background: rgba(255, 255, 255, 0.2);
    padding: 0.5rem;
    border-radius: 12px;
}

.footer-brand-desc {
    color: rgba(255, 255, 255, 0.85);
    line-height: 1.7;
    margin-bottom: 1.5rem;
    font-size: 0.95rem;
}

.footer-social-modern {
    display: flex;
    gap: 0.75rem;
}

.social-link-modern {
    width: 42px;
    height: 42px;
    border-radius: 12px;
    background: rgba(255, 255, 255, 0.15);
    border: 2px solid rgba(255, 255, 255, 0.2);
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.15rem;
    transition: all 0.3s ease;
    text-decoration: none;
}

.social-link-modern:hover {
    background: rgba(255, 255, 255, 0.25);
    border-color: rgba(255, 255, 255, 0.4);
    transform: translateY(-3px);
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.3);
    color: white;
}

/* Footer Links Grid */
.footer-links-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 2.5rem;
}

.footer-section-modern {
    min-width: 0;
}

.footer-section-title-modern {
    color: white;
    font-weight: 700;
    font-size: 1.15rem;
    margin-bottom: 1.25rem;
    letter-spacing: 0.3px;
}

.footer-list-modern {
    list-style: none;
    padding: 0;
    margin: 0;
}

.footer-list-modern li {
    margin-bottom: 0.75rem;
}

.footer-link-modern {
    color: rgba(255, 255, 255, 0.85);
    text-decoration: none;
    transition: all 0.3s ease;
    display: inline-flex;
    align-items: center;
    padding: 0.35rem 0;
    font-size: 0.95rem;
    font-weight: 500;
}

.footer-link-modern:hover {
    color: white;
    transform: translateX(6px);
    text-decoration: none;
}

.footer-link-modern i {
    font-size: 0.9rem;
    opacity: 0.8;
}

/* Footer Bottom */
.footer-bottom-modern {
    border-top: 1px solid rgba(255, 255, 255, 0.2);
    padding-top: 1.75rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 1rem;
}

.footer-copyright-modern {
    color: rgba(255, 255, 255, 0.8);
    margin: 0;
    font-size: 0.9rem;
    font-weight: 500;
}

.footer-made-with {
    color: rgba(255, 255, 255, 0.8);
    margin: 0;
    font-size: 0.9rem;
    font-weight: 500;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.footer-made-with i {
    animation: heartbeat 1.5s ease-in-out infinite;
}

@keyframes heartbeat {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.1); }
}

/* Mobile Responsive Footer */
@media (max-width: 992px) {
    .footer-modern-new {
        padding: 3rem 0 1.5rem;
        margin-top: 4rem;
    }
    
    .footer-main-content {
        grid-template-columns: 1fr;
        gap: 2.5rem;
    }
    
    .footer-brand-section {
        max-width: 100%;
    }
    
    .footer-links-grid {
        gap: 2rem;
    }
}

@media (max-width: 768px) {
    .footer-modern-new {
        padding: 2.5rem 0 1.5rem;
        margin-top: 3rem;
    }
    
    .footer-main-content {
        gap: 2rem;
    }
    
    .footer-links-grid {
        grid-template-columns: 1fr;
        gap: 1.75rem;
    }
    
    .footer-brand {
        font-size: 1.5rem;
    }
    
    .footer-brand i {
        font-size: 1.5rem;
        padding: 0.4rem;
    }
    
    .footer-bottom-modern {
        flex-direction: column;
        text-align: center;
        gap: 1.25rem;
    }
    
    .footer-social-modern {
        justify-content: center;
    }
}

@media (max-width: 480px) {
    .footer-modern-new {
        padding: 2rem 0 1.25rem;
    }
    
    .footer-brand-desc {
        font-size: 0.9rem;
    }
    
    .footer-section-title-modern {
        font-size: 1.05rem;
    }
    
    .footer-link-modern {
        font-size: 0.9rem;
    }
    
    .social-link-modern {
        width: 38px;
        height: 38px;
        font-size: 1rem;
    }
}

/* Old footer compatibility */
.footer,
.footer-modern {
    background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary-color) 100%);
    color: white;
    padding: 3rem 0 1.5rem;
    margin-top: 4rem;
}

.social-link {
    color: rgba(255, 255, 255, 0.85);
    font-size: 1.25rem;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 2.75rem;
    height: 2.75rem;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.15);
    text-decoration: none;
}

/* ================================
   Back to Top Button
   ================================ */
.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    display: none;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    box-shadow: 0 4px 15px rgba(46, 90, 138, 0.4);
    transition: all 0.3s ease;
    opacity: 0;
    transform: translateY(20px);
}

.back-to-top.show {
    display: flex;
    opacity: 1;
    transform: translateY(0);
}

.back-to-top:hover {
    transform: translateY(-5px);
    box-shadow: 0 6px 20px rgba(46, 90, 138, 0.5);
}

@media (max-width: 576px) {
    .back-to-top {
        width: 40px;
        height: 40px;
        bottom: 20px;
        right: 20px;
    }
}

/* ================================
   Utility Classes
   ================================ */
.w-full { width: 100%; }
.h-full { height: 100%; }
.min-h-screen { min-height: 100vh; }

/* Flexbox */
.flex { display: flex; }
.flex-col { flex-direction: column; }
.flex-wrap { flex-wrap: wrap; }
.items-center { align-items: center; }
.items-start { align-items: flex-start; }
.justify-center { justify-content: center; }
.justify-between { justify-content: space-between; }
.gap-2 { gap: 0.5rem; }
.gap-3 { gap: 0.75rem; }
.gap-4 { gap: 1rem; }

/* Spacing */
.p-3 { padding: 0.75rem; }
.p-4 { padding: 1rem; }
.p-5 { padding: 1.5rem; }
.px-3 { padding-left: 0.75rem; padding-right: 0.75rem; }
.px-4 { padding-left: 1rem; padding-right: 1rem; }
.py-4 { padding-top: 1rem; padding-bottom: 1rem; }
.py-5 { padding-top: 1.5rem; padding-bottom: 1.5rem; }
.py-6 { padding-top: 2rem; padding-bottom: 2rem; }
.py-8 { padding-top: 2.5rem; padding-bottom: 2.5rem; }

.m-0 { margin: 0; }
.mb-0 { margin-bottom: 0; }
.mb-1 { margin-bottom: 0.25rem; }
.mb-2 { margin-bottom: 0.5rem; }
.mb-3 { margin-bottom: 0.75rem; }
.mb-4 { margin-bottom: 1rem; }
.mb-5 { margin-bottom: 1.5rem; }
.mt-2 { margin-top: 0.5rem; }
.mt-3 { margin-top: 0.75rem; }
.mt-4 { margin-top: 1rem; }
.mx-auto { margin-left: auto; margin-right: auto; }

/* Display */
.d-none { display: none; }
.d-block { display: block; }
.d-flex { display: flex; }

/* Borders */
.rounded { border-radius: var(--radius-md); }
.rounded-lg { border-radius: var(--radius-lg); }
.rounded-xl { border-radius: var(--radius-xl); }
.rounded-2xl { border-radius: var(--radius-2xl); }
.rounded-3xl { border-radius: var(--radius-3xl); }
.rounded-full { border-radius: var(--radius-full); }
.rounded-circle { border-radius: 50%; }

/* Shadows */
.shadow-sm { box-shadow: var(--shadow-sm); }
.shadow { box-shadow: var(--shadow-md); }
.shadow-lg { box-shadow: var(--shadow-lg); }

/* Background */
.bg-light { background: var(--background-light); }
.bg-gradient { background: var(--secondary-color); }

/* Transitions */
.transition-all { transition: all 0.3s ease; }

/* ================================
   Book List Page Enhancements
   ================================ */
.book-card-enhanced {
    background: white;
    border-radius: var(--radius-2xl);
    padding: 0.75rem;
    box-shadow: var(--shadow-sm);
    transition: all 0.3s ease;
    display: flex;
    flex-direction: column;
    height: 100%;
    border: 1px solid var(--border-light);
    max-height: 280px;
}

.book-card-enhanced:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-lg);
    border-color: var(--secondary-color);
}

.book-cover-enhanced {
    width: 100%;
    max-width: 110px;
    height: 110px;
    object-fit: cover;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-md);
    margin: 0 auto;
    transition: transform 0.3s ease;
}

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

.search-container {
    position: relative;
}

.search-input {
    width: 100%;
    padding: 1rem 3.5rem 1rem 1.25rem;
    border: 2px solid var(--border-color);
    border-radius: var(--radius-xl);
    font-size: 1.05rem;
    background: white;
    transition: all 0.3s ease;
}

.search-input:focus {
    outline: none;
    border-color: var(--secondary-color);
    box-shadow: 0 0 0 4px rgba(135, 206, 235, 0.15);
}

.search-icon {
    position: absolute;
    right: 1.25rem;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-muted);
    font-size: 1.25rem;
    pointer-events: none;
}

.pagination-enhanced {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 0.5rem;
    margin-top: 3rem;
    flex-wrap: wrap;
}

.pagination-btn {
    padding: 0.625rem 1rem;
    border-radius: var(--radius-lg);
    background: white;
    color: var(--primary-color);
    text-decoration: none;
    border: 2px solid var(--border-color);
    transition: all 0.3s ease;
    font-weight: 500;
    min-width: 44px;
    text-align: center;
}

.pagination-btn:hover {
    background: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
    transform: translateY(-2px);
    box-shadow: var(--shadow-sm);
}

.pagination-btn.active {
    background: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
    box-shadow: var(--shadow-md);
}

.empty-state-enhanced {
    text-align: center;
    padding: 4rem 2rem;
    background: white;
    border-radius: var(--radius-2xl);
    box-shadow: var(--shadow-sm);
}

.empty-icon-enhanced {
    font-size: 5rem;
    margin-bottom: 1.5rem;
    opacity: 0.6;
}

.empty-title-enhanced {
    font-size: var(--font-size-3xl);
    color: var(--text-color);
    margin-bottom: 1rem;
    font-weight: 600;
}

.empty-description-enhanced {
    font-size: var(--font-size-lg);
    color: var(--text-muted);
    margin-bottom: 2rem;
    max-width: 500px;
    margin-left: auto;
    margin-right: auto;
}

.rating-stars {
    display: flex;
    gap: 0.25rem;
    align-items: center;
}

.rating-star {
    color: #FDB022;
    font-size: 1.25rem;
}

.rating-star.empty {
    color: #D1D5DB;
}

.rating-star.small {
    font-size: 1rem;
}

/* ================================
   Feature Cards (About Page)
   ================================ */
.feature-card {
    background: white;
    padding: 2rem;
    border-radius: var(--radius-2xl);
    box-shadow: var(--shadow-sm);
    transition: all 0.3s ease;
    border: 1px solid var(--border-light);
    height: 100%;
}

.feature-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-lg);
    border-color: var(--secondary-color);
}

.feature-icon {
    width: 64px;
    height: 64px;
    border-radius: var(--radius-xl);
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-light) 100%);
    display: flex;
    align-items: center;
    justify-content: center;
}

.feature-title {
    font-size: var(--font-size-xl);
    font-weight: 700;
    color: var(--text-color);
    margin-bottom: 1rem;
}

.feature-description {
    color: var(--text-light);
    margin-bottom: 1.25rem;
    line-height: 1.6;
}

.feature-list {
    list-style: none;
    padding: 0;
    margin: 0;
}

.feature-list li {
    padding: 0.5rem 0;
    color: var(--text-muted);
    position: relative;
    padding-left: 1.75rem;
}

.feature-list li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--primary-color);
    font-weight: bold;
    font-size: 1.1rem;
}

.bg-gradient-primary {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-light) 100%) !important;
}

.feedback-icon-wrapper {
    display: flex;
    justify-content: center;
    align-items: center;
}

/* ================================
   Library/Reading List Page Enhancements
   ================================ */
.library-header {
    background: linear-gradient(135deg, rgba(135, 206, 235, 0.1) 0%, rgba(240, 248, 255, 0.1) 100%);
    padding: 2rem;
    border-radius: var(--radius-2xl);
    border: 1px solid var(--border-light);
    box-shadow: var(--shadow-sm);
}

.library-actions {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}

.stat-card {
    background: white;
    border-radius: var(--radius-2xl);
    padding: 1.75rem;
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--border-light);
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    gap: 1.5rem;
}

.stat-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
    border-color: var(--secondary-color);
}

.stat-card-icon {
    width: 60px;
    height: 60px;
    border-radius: var(--radius-xl);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.75rem;
    color: white;
    flex-shrink: 0;
}

.stat-card-icon.bg-info {
    background: linear-gradient(135deg, #0EA5E9 0%, #38BDF8 100%);
}

.stat-card-icon.bg-warning {
    background: linear-gradient(135deg, #F59E0B 0%, #FBBF24 100%);
}

.stat-card-icon.bg-success {
    background: linear-gradient(135deg, #10B981 0%, #34D399 100%);
}

.stat-card-content {
    flex-grow: 1;
}

.stat-card-value {
    font-size: 2.25rem;
    font-weight: 800;
    color: var(--text-color);
    margin: 0;
    line-height: 1;
}

.stat-card-label {
    font-size: 0.95rem;
    color: var(--text-muted);
    margin: 0.5rem 0 0;
    font-weight: 500;
}

.book-cover-container {
    display: flex;
    justify-content: center;
    margin-bottom: 0.75rem;
}

.book-info {
    text-align: center;
    margin-bottom: 0.75rem;
    flex-grow: 1;
}

.book-title {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-color);
    margin-bottom: 0.25rem;
    line-height: 1.2;
}

.book-author {
    font-size: 0.85rem;
    color: var(--text-muted);
    margin: 0;
}

.book-actions {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    margin-top: auto;
}

.action-btn {
    padding: 0.5rem 0.75rem;
    border-radius: var(--radius-md);
    text-decoration: none;
    font-size: 0.85rem;
    font-weight: 500;
    text-align: center;
    transition: all 0.3s ease;
}

.view-btn {
    background: var(--primary-color);
    color: white;
    border: none;
}

.view-btn:hover {
    background: var(--primary-light);
    transform: translateY(-2px);
    box-shadow: var(--shadow-sm);
    color: white;
}

.remove-btn {
    background: transparent;
    color: var(--danger-color);
    border: 1px solid var(--danger-color);
}

.remove-btn:hover {
    background: var(--danger-color);
    color: white;
    transform: translateY(-2px);
}

.show-more-container {
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 1rem;
    grid-column: 1 / -1;
}

.show-more-btn {
    background: var(--primary-color);
    color: white;
    border: none;
    padding: 0.75rem 2rem;
    border-radius: var(--radius-lg);
    font-size: 0.95rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
}

.show-more-btn:hover {
    background: var(--primary-light);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.hidden-books {
    display: none;
    grid-column: 1 / -1;
}

/* ================================
   Animations
   ================================ */
@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

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

@keyframes fadeInDown {
    from {
        opacity: 0;
        transform: translateY(-20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes spin {
    to {
        transform: rotate(360deg);
    }
}

.animate-fade-in {
    animation: fadeIn 0.5s ease-out;
}

.animate-fade-in-up {
    animation: fadeInUp 0.6s ease-out;
}

.loading-spinner {
    display: inline-block;
    width: 1.5rem;
    height: 1.5rem;
    border: 3px solid rgba(46, 90, 138, 0.2);
    border-top: 3px solid var(--primary-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

/* ================================
   Accessibility
   ================================ */
*:focus-visible {
    outline: 2px solid var(--secondary-color);
    outline-offset: 2px;
    border-radius: 4px;
}

::selection {
    background: var(--secondary-color);
    color: white;
}

/* ================================
   Scrollbar
   ================================ */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: var(--background-light);
}

::-webkit-scrollbar-thumb {
    background: var(--secondary-color);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--primary-color);
}

/* ================================
   Mobile Optimizations
   ================================ */
@media (max-width: 576px) {
    .card {
        border-radius: 10px;
    }
    
    .card-body {
        padding: 1rem;
    }
}

@media (max-width: 768px) {
    .row {
        margin-left: 0 !important;
        margin-right: 0 !important;
    }
    
    .row > * {
        padding-left: 0.5rem !important;
        padding-right: 0.5rem !important;
    }
    
    .d-flex.gap-3 {
        flex-direction: column !important;
        gap: 1rem !important;
    }
    
    .review-vote-buttons {
    display: flex;
        gap: 0.5rem;
    align-items: center;
        flex-wrap: wrap;
    }
    
    .review-vote-buttons .btn {
        min-height: 44px;
        min-width: 44px;
    padding: 0.5rem 0.75rem;
        font-size: 0.875rem;
        touch-action: manipulation;
        -webkit-tap-highlight-color: transparent;
    }
    
    .review-vote-buttons .btn:active {
        transform: scale(0.95);
    }
}

/* ================================
   Touch Device Optimizations
   ================================ */
@media (hover: none) and (pointer: coarse) {
    .btn,
    .nav-link,
    .dropdown-item {
        min-height: 44px;
        min-width: 44px;
    }
    
    .card:hover {
    transform: none;
}

.dropdown-menu {
    padding: 0.5rem 0;
}

.dropdown-item {
        padding: 0.75rem 1rem;
    }
}

/* ================================
   Print Styles
   ================================ */
@media print {
    .navbar,
    .footer,
    .btn,
    .back-to-top,
    .toast-container {
        display: none !important;
    }
    
    .card {
        box-shadow: none;
        border: 1px solid #ddd;
        page-break-inside: avoid;
    }
    
    body {
        font-size: 12pt;
        line-height: 1.5;
        background: white;
        color: black;
    }
    
    a {
        text-decoration: underline;
    }
}

/* ================================
   Verification Code Input Styles
   ================================ */
.verification-code-input {
    font-size: 2rem !important;
    letter-spacing: 1rem;
    text-align: center;
    font-weight: bold;
    font-family: 'Courier New', monospace;
}

.verification-code-input::placeholder {
    letter-spacing: 0.5rem;
    opacity: 0.3;
}

/* ================================
   User Profile Page Styles
   ================================ */
.hover-primary:hover {
    color: #667eea !important;
}

.review-item {
    transition: all 0.3s ease;
}

.review-item:hover {
    background-color: #f8f9fa;
    border-radius: 0.5rem;
    padding-left: 0.5rem;
    padding-right: 0.5rem;
}

/* Pagination Styling */
.pagination .page-link {
    color: #667eea;
    border: 1px solid #dee2e6;
    transition: all 0.3s ease;
}

.pagination .page-link:hover {
    color: #764ba2;
    background-color: #f8f9fa;
    border-color: #667eea;
}

.pagination .page-link:focus {
    box-shadow: 0 0 0 0.2rem rgba(102, 126, 234, 0.25);
}

.pagination .page-item.disabled .page-link {
    color: #6c757d;
    background-color: #fff;
    border-color: #dee2e6;
}

@media (max-width: 768px) {
    .stat-icon {
        width: 40px !important;
        height: 40px !important;
    }
    
    .stat-icon i {
        font-size: 1rem;
    }
    
    /* Smaller pagination on mobile */
    .pagination {
        font-size: 0.875rem;
    }
    
    .pagination .page-link {
        padding: 0.375rem 0.75rem;
    }
}

/* ================================
   Social Authentication Styles
   ================================ */

/* Google Sign-In Button */
.btn-google {
    background: #ffffff;
    color: #3c4043;
    border: 1px solid #dadce0;
    font-weight: 500;
    font-size: 0.95rem;
    padding: 0.75rem 1.5rem;
    transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    display: flex;
    align-items: center;
    justify-content: center;
    text-decoration: none;
    position: relative;
    overflow: hidden;
}

.btn-google:hover {
    background: #f8f9fa;
    box-shadow: 0 1px 3px rgba(60, 64, 67, 0.3);
    color: #3c4043;
    border-color: #dadce0;
}

.btn-google:active {
    background: #f1f3f4;
    box-shadow: 0 1px 2px rgba(60, 64, 67, 0.3);
}

.btn-google:focus {
    box-shadow: 0 0 0 3px rgba(66, 133, 244, 0.25);
    outline: none;
}

.google-icon {
    flex-shrink: 0;
}

/* Social Login Divider */
.divider-container {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 1rem;
}

.divider-line {
    flex: 1;
    height: 1px;
    background: linear-gradient(to right, transparent, #e5e7eb 50%, transparent);
}

.divider-text {
    color: #9ca3af;
    font-size: 0.875rem;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    padding: 0 0.5rem;
}

/* Authentication Card Enhancements */
.auth-card {
    border-radius: var(--radius-2xl);
    overflow: hidden;
}

.auth-card .card-header {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%) !important;
    color: white;
}

.auth-icon-wrapper {
    display: flex;
    justify-content: center;
    align-items: center;
}

.auth-icon {
    width: 80px;
    height: 80px;
    background: rgba(255, 255, 255, 0.2);
    backdrop-filter: blur(10px);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    color: white;
    animation: float 3s ease-in-out infinite;
}

@keyframes float {
    0%, 100% {
        transform: translateY(0px);
    }
    50% {
        transform: translateY(-10px);
    }
}

.auth-title {
    font-weight: 700;
    font-size: 1.75rem;
    color: white;
}

/* ================================
   Recommendation Cards
   ================================ */
.recommended-book-card {
    display: block;
    transition: all 0.3s ease;
}

.book-card-modern {
    background: white;
    border-radius: 12px;
    padding: 0.75rem;
    box-shadow: 0 2px 8px rgba(0,0,0,0.08);
    transition: all 0.3s ease;
    height: 100%;
    border: 1px solid rgba(46, 90, 138, 0.1);
}

.book-card-modern:hover {
    transform: translateY(-8px);
    box-shadow: 0 12px 32px rgba(0,0,0,0.15);
    border-color: var(--primary-color);
}

.book-cover-modern {
    width: 100%;
    height: 140px;
    object-fit: cover;
    border-radius: 8px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.1);
}

.book-cover-placeholder-modern {
    width: 100%;
    height: 140px;
    background: linear-gradient(135deg, #e9ecef 0%, #dee2e6 100%);
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #adb5bd;
    font-size: 2rem;
}

.book-info-modern {
    text-align: center;
}

.book-title-modern {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-color);
    margin-bottom: 0.25rem;
    line-height: 1.3;
    min-height: 2.6em;
}

.book-author-modern {
    font-size: 0.75rem;
    color: var(--text-muted);
    margin: 0;
    line-height: 1.2;
}

.book-rating-modern {
    font-size: 0.8rem;
    color: var(--text-muted);
    margin-top: 0.5rem;
}

.book-rating-modern i {
    font-size: 0.75rem;
}

/* Featured/Personalized Recommendation Cards */
.book-card-featured {
    background: white;
    border-radius: 16px;
    padding: 1rem;
    box-shadow: 0 4px 12px rgba(0,0,0,0.08);
    transition: all 0.3s ease;
    height: 100%;
    border: 2px solid rgba(46, 90, 138, 0.1);
}

.book-card-featured:hover {
    transform: translateY(-8px) scale(1.02);
    box-shadow: 0 16px 40px rgba(0,0,0,0.15);
    border-color: var(--primary-color);
}

.book-cover-featured {
    width: 100%;
    height: 200px;
    object-fit: cover;
    border-radius: 12px;
    box-shadow: 0 4px 12px rgba(0,0,0,0.15);
}

.book-cover-placeholder-featured {
    width: 100%;
    height: 200px;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-light) 100%);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 3rem;
}

.book-info-featured {
    text-align: center;
}

.book-title-featured {
    font-size: 1rem;
    font-weight: 700;
    color: var(--text-color);
    margin-bottom: 0.5rem;
    line-height: 1.3;
}

.book-author-featured {
    font-size: 0.85rem;
    color: var(--text-muted);
    margin-bottom: 0.5rem;
}

.book-rating-featured {
    font-size: 0.9rem;
    color: var(--text-muted);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.25rem;
}

.book-rating-featured i {
    font-size: 0.85rem;
}

@media (max-width: 768px) {
    .book-cover-modern {
        height: 120px;
    }
    
    .book-cover-featured {
        height: 160px;
    }
    
    .book-title-modern {
        font-size: 0.8rem;
        min-height: auto;
    }
    
    .book-title-featured {
        font-size: 0.9rem;
    }
}

/* ================================
   Universal Default Icons
   ================================ */

/* Hero Avatar */
.hero-avatar {
    width: 80px;
    height: 80px;
    border-radius: 50%;
    overflow: hidden;
    box-shadow: 0 4px 12px rgba(0,0,0,0.15);
    flex-shrink: 0;
}

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

.hero-avatar-placeholder {
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-light) 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 2rem;
}

/* Universal Profile Icon */
.profile-icon-placeholder {
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-weight: 700;
}

/* Universal Book Icon */
.book-icon-placeholder {
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, #e9ecef 0%, #dee2e6 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    color: #6c757d;
}

/* Activity Avatar Circle */
.activity-avatar .avatar-circle {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-light) 100%);
}

/* Navbar Avatar */
.profile-avatar-modern .avatar-text {
    color: white;
    font-weight: 700;
}

@media (max-width: 768px) {
    .hero-avatar {
        width: 60px;
        height: 60px;
    }
    
    .hero-avatar-placeholder {
        font-size: 1.5rem;
    }
}