/* BOOKLOVE.IN - Premium Design System System stylesheet */
@import url('https://fonts.googleapis.com/css2?family=Outfit:wght@300;400;500;600;700&family=Plus+Jakarta+Sans:wght@300;400;500;600;700&display=swap');

/* CSS Variables for Multi-Theme Framework */
:root {
    /* Color Palette */
    --accent-gradient-start: #8b5cf6; /* Violet */
    --accent-gradient-end: #3b82f6; /* Blue */
    --accent-glow: rgba(139, 92, 246, 0.35);
    
    /* Layout Tokens */
    --border-radius-sm: 8px;
    --border-radius-md: 16px;
    --border-radius-lg: 24px;
    --transition-smooth: all 0.4s cubic-bezier(0.16, 1, 0.3, 1);
    
    /* Font Families */
    --font-heading: 'Outfit', sans-serif;
    --font-body: 'Plus Jakarta Sans', sans-serif;
    
    /* Light Mode Default */
    --bg-primary: #f8fafc;
    --bg-secondary: #ffffff;
    --text-primary: #0f172a;
    --text-secondary: #475569;
    --border-color: rgba(15, 23, 42, 0.08);
    --glass-bg: rgba(255, 255, 255, 0.7);
    --glass-border: rgba(255, 255, 255, 0.4);
    --card-shadow: 0 10px 30px -10px rgba(0, 0, 0, 0.04), 0 1px 3px rgba(0, 0, 0, 0.02);
    --card-glow: 0 0 40px rgba(139, 92, 246, 0.02);
}

/* Dark Mode Theme overrides */
[data-theme="dark"] {
    --bg-primary: #0b0f19;
    --bg-secondary: #111827;
    --text-primary: #f8fafc;
    --text-secondary: #94a3b8;
    --border-color: rgba(248, 250, 252, 0.08);
    --glass-bg: rgba(11, 15, 25, 0.7);
    --glass-border: rgba(248, 250, 252, 0.08);
    --card-shadow: 0 20px 40px -15px rgba(0, 0, 0, 0.5);
    --card-glow: 0 0 40px rgba(139, 92, 246, 0.06);
}

/* Reading Mode (Sepia Paper) overrides */
[data-theme="reading"] {
    --bg-primary: #f5eedc;
    --bg-secondary: #faf6eb;
    --text-primary: #433422;
    --text-secondary: #70604c;
    --border-color: rgba(67, 52, 34, 0.08);
    --glass-bg: rgba(250, 246, 247, 0.85);
    --glass-border: rgba(67, 52, 34, 0.08);
    --card-shadow: 0 10px 25px rgba(67, 52, 34, 0.05);
    --card-glow: none;
}

/* Global Reset & Base Setup */
html {
    scroll-behavior: smooth;
}
* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
    font-family: var(--font-body);
}

body {
    background-color: var(--bg-primary);
    color: var(--text-primary);
    transition: var(--transition-smooth);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    overflow-x: hidden;
}

/* Custom Scrollbar */
::-webkit-scrollbar {
    width: 10px;
}
::-webkit-scrollbar-track {
    background: var(--bg-primary);
}
::-webkit-scrollbar-thumb {
    background: var(--border-color);
    border-radius: 5px;
}
::-webkit-scrollbar-thumb:hover {
    background: var(--accent-gradient-start);
}

/* Grid & Layout Utilities */
.container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 2rem;
    width: 100%;
}
.py-5 { padding-top: 3.5rem; padding-bottom: 3.5rem; }
.py-3 { padding-top: 3rem; padding-bottom: 3rem; }
.my-4 { margin-top: 2rem; margin-bottom: 2rem; }

/* Sticky Premium Header */
header {
    position: sticky;
    top: 0;
    z-index: 1000;
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-color);
    transition: var(--transition-smooth);
}

.nav-wrapper {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 80px;
}

.logo {
    font-family: var(--font-heading);
    font-weight: 700;
    font-size: 1.6rem;
    letter-spacing: -0.5px;
    background: linear-gradient(135deg, var(--accent-gradient-start), var(--accent-gradient-end));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.nav-menu {
    display: flex;
    gap: 2rem;
    list-style: none;
    align-items: center;
}

.nav-link {
    text-decoration: none;
    color: var(--text-secondary);
    font-weight: 500;
    font-size: 0.95rem;
    transition: var(--transition-smooth);
}
.nav-link:hover, .nav-link.active {
    color: var(--text-primary);
}

/* Premium Sub-Navigation Bar */
.sub-nav-link {
    position: relative;
}
.sub-nav-link:hover, .sub-nav-link.active {
    color: var(--accent-gradient-start) !important;
}
.sub-nav-link.active::after {
    content: '';
    position: absolute;
    bottom: -6px;
    left: 0;
    width: 100%;
    height: 2px;
    background: linear-gradient(135deg, var(--accent-gradient-start), var(--accent-gradient-end));
    border-radius: 2px;
}

@media (max-width: 768px) {
    .sub-nav-container {
        justify-content: flex-start !important;
        overflow-x: auto !important;
        white-space: nowrap;
        flex-wrap: nowrap !important;
        -webkit-overflow-scrolling: touch;
        padding-bottom: 0.3rem;
        gap: 1.5rem !important;
    }
    .sub-nav-container::-webkit-scrollbar {
        display: none;
    }
    .sub-nav-link {
        flex-shrink: 0;
    }
}

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

/* Theme Selector Control button */
.theme-toggle-btn {
    background: none;
    border: 1px solid var(--border-color);
    padding: 0.5rem 1rem;
    border-radius: 50px;
    color: var(--text-primary);
    cursor: pointer;
    font-weight: 500;
    font-size: 0.85rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    transition: var(--transition-smooth);
}
.theme-toggle-btn:hover {
    background-color: var(--border-color);
}

/* Premium Buttons */
.btn {
    padding: 0.8rem 1.8rem;
    border-radius: 50px;
    font-family: var(--font-heading);
    font-weight: 600;
    font-size: 0.9rem;
    cursor: pointer;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    transition: var(--transition-smooth);
    border: none;
}
.btn-primary {
    background: linear-gradient(135deg, var(--accent-gradient-start), var(--accent-gradient-end));
    color: #ffffff;
    box-shadow: 0 8px 25px -5px var(--accent-glow);
}
.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 12px 30px -5px var(--accent-glow);
}
.btn-secondary {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    box-shadow: var(--card-shadow);
}
.btn-secondary:hover {
    transform: translateY(-2px);
    background-color: var(--bg-primary);
}

/* Premium Hero Section with Mesh Gradient background */
.hero {
    position: relative;
    padding: 5.5rem 0 4.5rem 0;
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    overflow: hidden;
}

.hero-mesh {
    position: absolute;
    top: -30%;
    left: -10%;
    width: 120%;
    height: 140%;
    background-image: 
        radial-gradient(at 10% 20%, rgba(139, 92, 246, 0.15) 0px, transparent 50%),
        radial-gradient(at 90% 10%, rgba(59, 130, 246, 0.12) 0px, transparent 50%),
        radial-gradient(at 50% 80%, rgba(236, 72, 153, 0.05) 0px, transparent 50%);
    filter: blur(80px);
    z-index: -1;
    pointer-events: none;
    animation: pulse-mesh 25s ease-in-out infinite;
}

@keyframes pulse-mesh {
    0% { transform: scale(1) translate(0, 0); }
    50% { transform: scale(1.08) translate(3%, 2%); }
    100% { transform: scale(1) translate(0, 0); }
}

.hero h1 {
    font-family: var(--font-heading);
    font-size: 4rem;
    font-weight: 700;
    line-height: 1.15;
    letter-spacing: -2px;
    margin: 0 auto 1.5rem auto;
    max-width: 900px;
}
.hero h1 span {
    background: linear-gradient(135deg, var(--accent-gradient-start), var(--accent-gradient-end));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}
.hero p {
    font-size: 1.25rem;
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto 3rem auto;
    line-height: 1.6;
}

/* Premium Search Field (Floating/Sticky compatible) */
.search-wrapper {
    position: relative;
    max-width: 640px;
    width: 100%;
    margin: 0 auto;
    z-index: 100;
    transition: var(--transition-smooth);
}
.search-wrapper:focus-within {
    transform: scale(1.015);
}
.search-input {
    width: 100%;
    padding: 1.2rem 1.8rem 1.2rem 3.5rem;
    border-radius: 50px;
    border: 1px solid var(--border-color);
    background: var(--glass-bg);
    color: var(--text-primary);
    font-size: 1.1rem;
    outline: none;
    box-shadow: var(--card-shadow);
    transition: var(--transition-smooth);
}
.search-input:focus {
    border-color: var(--accent-gradient-start);
    box-shadow: 0 10px 40px -10px var(--accent-glow);
}
.search-icon-svg {
    position: absolute;
    left: 1.5rem;
    top: 50%;
    transform: translateY(-50%);
    width: 20px;
    height: 20px;
    fill: var(--text-secondary);
}

/* Live Instant Autocomplete Dropdown */
.search-dropdown {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 20px;
    margin-top: 0.8rem;
    box-shadow: var(--card-shadow);
    display: none;
    flex-direction: column;
    z-index: 9999;
    max-height: 320px;
    overflow-y: auto;
    overflow-x: hidden;
}
.search-item {
    display: flex;
    align-items: center;
    padding: 1rem 1.5rem;
    gap: 1rem;
    text-decoration: none;
    color: var(--text-primary);
    transition: var(--transition-smooth);
    border-bottom: 1px solid var(--border-color);
}
.search-item:last-child { border: none; }
.search-item:hover {
    background-color: var(--border-color);
}
.search-item img {
    width: 40px;
    height: 55px;
    object-fit: cover;
    border-radius: 4px;
}
.search-item-info h4 {
    font-size: 0.95rem;
    font-weight: 600;
}
.search-item-info p {
    font-size: 0.8rem;
    color: var(--text-secondary);
}

/* Premium Card System */
.card-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    gap: 2rem;
}
.card {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-md);
    padding: 1.5rem;
    box-shadow: var(--card-shadow);
    transition: var(--transition-smooth);
    position: relative;
    overflow: hidden;
    display: flex;
    flex-direction: column;
}
.card::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0; bottom: 0;
    background: radial-gradient(circle at top right, var(--card-glow), transparent 60%);
    pointer-events: none;
    z-index: 1;
}
.card:hover {
    transform: translateY(-8px);
    border-color: var(--accent-gradient-start);
    box-shadow: 0 20px 40px -10px rgba(139, 92, 246, 0.15);
}

/* Book Cover Styling */
.book-card-cover {
    height: 320px;
    border-radius: 8px;
    object-fit: cover;
    width: 100%;
    margin-bottom: 1.2rem;
    box-shadow: 0 8px 20px -8px rgba(0, 0, 0, 0.3);
}

/* Stats Counter Grid */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 2rem;
    margin-top: 3.5rem;
    width: 100%;
}
.stat-box {
    text-align: center;
    background: var(--glass-bg);
    border: 1px solid var(--border-color);
    padding: 2rem 1.5rem;
    border-radius: var(--border-radius-lg);
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.02);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    transition: var(--transition-smooth);
    position: relative;
    overflow: hidden;
}
.stat-box::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0; bottom: 0;
    background: radial-gradient(circle at top right, rgba(139, 92, 246, 0.05), transparent 60%);
    pointer-events: none;
    z-index: 1;
}
.stat-box:hover {
    transform: translateY(-6px);
    border-color: rgba(139, 92, 246, 0.4);
    box-shadow: 0 15px 35px -10px rgba(139, 92, 246, 0.12);
}
.stat-icon {
    display: inline-block;
    transition: var(--transition-smooth);
}
.stat-box:hover .stat-icon {
    transform: scale(1.2) translateY(-2px);
}
.stat-number {
    font-family: var(--font-heading);
    font-size: 2.2rem;
    font-weight: 800;
    background: linear-gradient(135deg, var(--accent-gradient-start), var(--accent-gradient-end));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    margin-top: 0.4rem;
    letter-spacing: -1px;
}
.stat-label {
    font-size: 0.88rem;
    font-weight: 600;
    color: var(--text-secondary);
    margin-top: 0.3rem;
}

/* Footer Section */
footer {
    background-color: var(--bg-secondary);
    border-top: 1px solid var(--border-color);
    padding: 5rem 0 3rem 0;
    margin-top: auto;
}
.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1.2fr 1.2fr 1.2fr 1.2fr;
    gap: 2.5rem;
    margin-bottom: 4rem;
}
.footer-logo-text {
    font-size: 0.95rem;
    color: var(--text-secondary);
    margin-top: 1rem;
    line-height: 1.6;
    max-width: 280px;
}
.footer-heading {
    font-family: var(--font-heading);
    font-size: 0.85rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 1.5rem;
    color: var(--text-primary);
}
.footer-links {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 0.7rem;
}
.footer-link {
    text-decoration: none;
    color: var(--text-secondary);
    transition: var(--transition-smooth);
    font-size: 0.9rem;
}
.footer-link:hover {
    color: var(--text-primary);
}

.footer-bottom {
    border-top: 1px solid var(--border-color);
    padding-top: 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.9rem;
    color: var(--text-secondary);
}

/* AI Book Chat Sidebar or Modal Box */
.chat-container {
    border: 1px solid var(--border-color);
    background: var(--bg-secondary);
    border-radius: var(--border-radius-md);
    box-shadow: var(--card-shadow);
    display: flex;
    flex-direction: column;
    height: 480px;
    overflow: hidden;
}
.chat-header {
    background: linear-gradient(135deg, var(--accent-gradient-start), var(--accent-gradient-end));
    padding: 1.2rem;
    color: white;
    font-weight: 600;
    display: flex;
    justify-content: space-between;
}
.chat-messages {
    flex: 1;
    padding: 1.5rem;
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    gap: 1rem;
}
.chat-bubble {
    padding: 0.8rem 1.2rem;
    border-radius: var(--border-radius-md);
    max-width: 80%;
    line-height: 1.5;
}
.chat-bubble-user {
    background: var(--border-color);
    align-self: flex-end;
}
.chat-bubble-ai {
    background: var(--bg-primary);
    align-self: flex-start;
    border: 1px solid var(--border-color);
}
.chat-input-area {
    display: flex;
    border-top: 1px solid var(--border-color);
    background: var(--bg-secondary);
}
.chat-text-input {
    flex: 1;
    border: none;
    padding: 1.2rem;
    outline: none;
    background: transparent;
    color: var(--text-primary);
}
.chat-send-btn {
    padding: 0 1.5rem;
    background: linear-gradient(135deg, var(--accent-gradient-start), var(--accent-gradient-end));
    color: white;
    border: none;
    font-weight: 600;
    cursor: pointer;
}

/* Alert Banners */
.alert {
    padding: 1rem 1.5rem;
    border-radius: var(--border-radius-sm);
    margin-bottom: 2rem;
    font-weight: 500;
    border: 1px solid transparent;
}
.alert-success {
    background-color: rgba(16, 185, 129, 0.1);
    color: #10b981;
    border-color: rgba(16, 185, 129, 0.2);
}
.alert-danger {
    background-color: rgba(239, 68, 68, 0.1);
    color: #ef4444;
    border-color: rgba(239, 68, 68, 0.2);
}
.alert-info {
    background-color: rgba(59, 130, 246, 0.1);
    color: #3b82f6;
    border-color: rgba(59, 130, 246, 0.2);
}

/* Form Styles */
.form-group {
    margin-bottom: 1.5rem;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}
.form-label {
    font-weight: 600;
    font-size: 0.9rem;
}
.form-control {
    padding: 0.8rem 1.2rem;
    border-radius: var(--border-radius-sm);
    border: 1px solid var(--border-color);
    background-color: var(--bg-primary);
    color: var(--text-primary);
    outline: none;
    transition: var(--transition-smooth);
}
.form-control:focus {
    border-color: var(--accent-gradient-start);
}

/* Auth Page layout */
.auth-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
}
.auth-card {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-md);
    padding: 3rem;
    box-shadow: var(--card-shadow);
}

/* Tab controls */
.tabs {
    display: flex;
    gap: 1rem;
    margin-bottom: 2rem;
    border-bottom: 1px solid var(--border-color);
}
.tab {
    padding: 0.8rem 1.5rem;
    cursor: pointer;
    font-weight: 600;
    color: var(--text-secondary);
    border-bottom: 2px solid transparent;
}
.tab.active {
    color: var(--text-primary);
    border-color: var(--accent-gradient-start);
}

/* Rating Stars representation */
.stars {
    display: inline-flex;
    gap: 0.2rem;
    color: #f59e0b; /* Golden Amber */
}

/* Responsive Breakpoints */
@media (max-width: 1024px) {
    .footer-grid {
        grid-template-columns: repeat(3, 1fr);
        gap: 2.5rem;
    }
    .auth-grid {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
}

@media (max-width: 768px) {
    .nav-menu { display: none; }
    .hero h1 { font-size: 2.8rem; }
    .stats-grid { grid-template-columns: 1fr 1fr; gap: 2rem; }
    .footer-grid { grid-template-columns: 1fr 1fr; gap: 2rem; }
    .header-quote-wrapper { display: none !important; }
}

@media (max-width: 480px) {
    .footer-grid { grid-template-columns: 1fr; gap: 1.8rem; }
}

/* Seamless GPU-Accelerated Right to Left Marquee Ticker */
.quote-marquee-rtl {
    display: inline-block;
    padding-left: 2rem;
    animation: marquee-rtl 40s linear infinite;
    will-change: transform; /* Hardware GPU acceleration to prevent lag! */
}
.quote-marquee-rtl:hover {
    animation-play-state: paused; /* Pause scrolling when user hovers */
}

@keyframes marquee-rtl {
    0% {
        transform: translate3d(0, 0, 0);
    }
    100% {
        transform: translate3d(-50%, 0, 0); /* Perfect loop reset at exactly 50% width */
    }
}

/* Mega Menu Styles */
.mega-menu-parent {
    position: relative;
}
.mega-menu-dropdown {
    position: absolute;
    top: 100%;
    left: 50%;
    transform: translateX(-50%) translateY(15px);
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-md);
    padding: 2rem;
    box-shadow: var(--card-shadow);
    display: block;
    visibility: hidden;
    opacity: 0;
    transition: opacity 0.25s cubic-bezier(0.16, 1, 0.3, 1), transform 0.25s cubic-bezier(0.16, 1, 0.3, 1), visibility 0.25s;
    z-index: 1500;
}
.mega-menu-parent:hover .mega-menu-dropdown {
    visibility: visible;
    opacity: 1;
    transform: translateX(-50%) translateY(0);
}
.mega-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
}
.mega-grid h4 {
    font-size: 0.75rem;
    color: var(--text-secondary);
    text-transform: uppercase;
    margin-bottom: 1rem;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 0.4rem;
    font-family: var(--font-heading);
    letter-spacing: 0.5px;
}
.mega-grid a {
    display: block;
    text-decoration: none;
    color: var(--text-primary);
    font-size: 0.9rem;
    margin-bottom: 0.8rem;
    font-weight: 600;
    transition: var(--transition-smooth);
}
.mega-grid a:hover {
    color: var(--accent-gradient-start);
    transform: translateX(4px);
}

/* Dynamic Slide-in Toast Notifications */
.toast-container {
    position: fixed;
    bottom: 24px;
    right: 24px;
    display: flex;
    flex-direction: column;
    gap: 12px;
    z-index: 9999;
    pointer-events: none;
}
.toast {
    background: var(--bg-secondary);
    color: var(--text-primary);
    border-left: 4px solid var(--accent-gradient-start);
    padding: 1rem 1.5rem;
    border-radius: var(--border-radius-sm);
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.08);
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-size: 0.9rem;
    font-weight: 600;
    pointer-events: auto;
    min-width: 300px;
    transform: translateX(120%);
    transition: transform 0.4s cubic-bezier(0.16, 1, 0.3, 1), opacity 0.4s;
    opacity: 0;
}
.toast.show {
    transform: translateX(0);
    opacity: 1;
}
.toast-success {
    border-left-color: #10b981;
}
.toast-error {
    border-left-color: #ef4444;
}
.toast-info {
    border-left-color: #3b82f6;
}

/* Cart Badge Pop Micro-interaction */
@keyframes badgePop {
    0% { transform: scale(1); }
    50% { transform: scale(1.4); }
    100% { transform: scale(1); }
}
.badge-pop {
    animation: badgePop 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

/* Card Hover Scale Transitions */
.book-card, .marketplace-card, .store-card, .card {
    transition: var(--transition-smooth);
}
.book-card:hover, .marketplace-card:hover, .store-card:hover, .card:hover {
    transform: translateY(-5px);
    box-shadow: 0 12px 30px rgba(139, 92, 246, 0.12);
}