/* ===========================
   BanterBox Library - Modern Premium Styles
   =========================== */

:root {
    /* Color System - Dark Mode Default */
    --bg-primary: #0a0a0a;
    --bg-secondary: #141414;
    --bg-tertiary: #1a1a1a;
    --bg-elevated: #242424;

    --text-primary: #ffffff;
    --text-secondary: #a8a8a8;
    --text-tertiary: #666666;

    --accent-primary: #6366f1;
    --accent-secondary: #818cf8;
    --accent-gradient: linear-gradient(135deg, #6366f1 0%, #8b5cf6 100%);

    --border-color: rgba(255, 255, 255, 0.1);
    --shadow-color: rgba(0, 0, 0, 0.5);

    /* Glass Effect */
    --glass-bg: rgba(255, 255, 255, 0.05);
    --glass-border: rgba(255, 255, 255, 0.1);

    /* Typography */
    --font-display: 'Crimson Text', serif;
    --font-body: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;

    /* Spacing */
    --space-xs: 0.5rem;
    --space-sm: 1rem;
    --space-md: 1.5rem;
    --space-lg: 2rem;
    --space-xl: 3rem;
    --space-2xl: 5rem;

    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-base: 250ms ease;
    --transition-slow: 400ms ease;

    /* Z-index layers */
    --z-base: 1;
    --z-elevated: 10;
    --z-modal: 100;
    --z-loading: 200;
}

/* Light Mode */
[data-theme="light"] {
    --bg-primary: #ffffff;
    --bg-secondary: #f8f8f8;
    --bg-tertiary: #f0f0f0;
    --bg-elevated: #ffffff;

    --text-primary: #0a0a0a;
    --text-secondary: #525252;
    --text-tertiary: #a8a8a8;

    --accent-primary: #6366f1;
    --accent-secondary: #4f46e5;
    --accent-gradient: linear-gradient(135deg, #6366f1 0%, #8b5cf6 100%);

    --border-color: rgba(0, 0, 0, 0.1);
    --shadow-color: rgba(0, 0, 0, 0.1);

    --glass-bg: rgba(255, 255, 255, 0.7);
    --glass-border: rgba(0, 0, 0, 0.1);
}

/* Reset & Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    font-size: 16px;
    scroll-behavior: smooth;
}

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

/* Loading Screen */
.loading-screen {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--bg-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: var(--z-loading);
    transition: opacity var(--transition-slow);
}

.loading-screen.fade-out {
    opacity: 0;
    pointer-events: none;
}

.loading-content {
    text-align: center;
}

.loading-logo {
    color: var(--accent-primary);
    margin-bottom: var(--space-md);
    animation: pulse 2s ease-in-out infinite;
}

.loading-text {
    color: var(--text-secondary);
    margin-bottom: var(--space-md);
    font-size: 0.875rem;
}

.loading-bar {
    width: 200px;
    height: 3px;
    background: var(--border-color);
    border-radius: 3px;
    overflow: hidden;
}

.loading-progress {
    height: 100%;
    background: var(--accent-gradient);
    width: 0;
    animation: loadingProgress 2s ease-out forwards;
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}

@keyframes loadingProgress {
    to { width: 100%; }
}

/* Navigation */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: 72px;
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--glass-border);
    z-index: var(--z-elevated);
    transition: all var(--transition-base);
}

.nav-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 var(--space-lg);
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.nav-brand {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    color: var(--text-primary);
    text-decoration: none;
}

.brand-icon {
    color: var(--accent-primary);
}

.brand-text {
    font-size: 1.25rem;
    font-weight: 600;
    font-family: var(--font-display);
}

.nav-menu {
    display: flex;
    gap: var(--space-lg);
}

.nav-link {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.875rem;
    font-weight: 500;
    transition: color var(--transition-fast);
    position: relative;
}

.nav-link:hover {
    color: var(--text-primary);
}

.nav-link.active {
    color: var(--accent-primary);
}

.nav-link.active::after {
    content: '';
    position: absolute;
    bottom: -8px;
    left: 0;
    right: 0;
    height: 2px;
    background: var(--accent-primary);
    border-radius: 2px;
}

.nav-actions {
    display: flex;
    align-items: center;
    gap: var(--space-md);
}

.theme-toggle {
    background: none;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    padding: var(--space-xs);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: color var(--transition-fast);
    position: relative;
    width: 32px;
    height: 32px;
}

.theme-toggle:hover {
    color: var(--text-primary);
}

.sun-icon,
.moon-icon {
    transition: opacity var(--transition-fast), transform var(--transition-fast);
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
}

[data-theme="dark"] .sun-icon {
    opacity: 0;
    transform: translate(-50%, -50%) rotate(180deg);
}

[data-theme="light"] .moon-icon {
    opacity: 0;
    transform: translate(-50%, -50%) rotate(-180deg);
}

[data-theme="dark"] .moon-icon {
    opacity: 1;
    transform: translate(-50%, -50%) rotate(0deg);
}

[data-theme="light"] .sun-icon {
    opacity: 1;
    transform: translate(-50%, -50%) rotate(0deg);
}

/* Hero Section */
.hero {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    position: relative;
    padding: calc(72px + var(--space-2xl)) var(--space-lg) var(--space-2xl);
}

.hero-background {
    position: absolute;
    inset: 0;
    overflow: hidden;
}

.hero-gradient {
    position: absolute;
    inset: -50%;
    background: radial-gradient(circle at 30% 50%, rgba(99, 102, 241, 0.1) 0%, transparent 50%),
                radial-gradient(circle at 70% 50%, rgba(139, 92, 246, 0.1) 0%, transparent 50%);
    animation: gradientShift 20s ease-in-out infinite;
}

@keyframes gradientShift {
    0%, 100% { transform: translate(0, 0); }
    33% { transform: translate(50px, -50px); }
    66% { transform: translate(-50px, 50px); }
}

.hero-pattern {
    position: absolute;
    inset: 0;
    background-image:
        radial-gradient(circle at 25% 25%, transparent 0%, var(--bg-primary) 50%),
        radial-gradient(circle at 75% 75%, transparent 0%, var(--bg-primary) 50%);
    background-size: 50px 50px;
    opacity: 0.03;
}

.hero-content {
    text-align: center;
    max-width: 900px;
    width: 100%;
    margin: 0 auto;
    z-index: var(--z-base);
    position: relative;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.hero-title {
    font-family: var(--font-display);
    font-size: clamp(3rem, 8vw, 5.5rem);
    font-weight: 600;
    line-height: 1.1;
    margin-bottom: var(--space-lg);
    width: 100%;
}

.title-line {
    display: block;
}

.gradient-text {
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto var(--space-xl);
    line-height: 1.8;
}

.hero-stats {
    display: flex;
    justify-content: center;
    gap: var(--space-xl);
    margin-bottom: var(--space-2xl);
    width: 100%;
}

.stat {
    text-align: center;
}

.stat-number {
    display: block;
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--accent-primary);
    margin-bottom: var(--space-xs);
}

.stat-label {
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.hero-scroll {
    position: absolute;
    bottom: var(--space-lg);
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-xs);
    color: var(--text-secondary);
    font-size: 0.875rem;
    animation: bounce 3s ease-in-out infinite;
}

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

/* Learn More Indicator */
.learn-more-indicator {
    position: absolute;
    bottom: 3.5rem;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
    cursor: pointer;
    color: var(--text-secondary);
    transition: color 0.3s ease;
}

.learn-more-indicator::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    animation: gentleBounce 2s ease-in-out infinite;
}

.learn-more-indicator:hover {
    color: var(--accent-primary);
}

.indicator-text {
    font-size: 0.875rem;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    opacity: 0.8;
    position: relative;
    z-index: 1;
}

.indicator-arrow {
    width: 20px;
    height: 20px;
    opacity: 0.6;
    position: relative;
    z-index: 1;
    animation: gentleBounce 2s ease-in-out infinite;
}

@keyframes gentleBounce {
    0%, 100% {
        transform: translateY(0);
    }
    50% {
        transform: translateY(8px);
    }
}

/* Hide indicator when scrolled */
.learn-more-indicator.hidden {
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.5s ease;
}

/* Mobile adjustments */
@media (max-width: 768px) {
    .learn-more-indicator {
        bottom: 1rem;
    }
    
    .indicator-text {
        font-size: 0.75rem;
    }
    
    .indicator-arrow {
        width: 18px;
        height: 18px;
    }
}

/* Filter Section */
.filters {
    padding: var(--space-xl) 0;
    background: var(--bg-secondary);
    border-top: 1px solid var(--border-color);
    border-bottom: 1px solid var(--border-color);
}

.filters .container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 var(--space-lg);
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: var(--space-lg);
    flex-wrap: wrap;
}

.filter-group {
    display: flex;
    gap: var(--space-sm);
    flex-wrap: wrap;
}

.filter-btn {
    background: none;
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    padding: var(--space-xs) var(--space-md);
    border-radius: 24px;
    font-size: 0.875rem;
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.filter-btn:hover {
    border-color: var(--accent-primary);
    color: var(--text-primary);
}

.filter-btn.active {
    background: var(--accent-gradient);
    border-color: transparent;
    color: white;
}

.search-box {
    position: relative;
    width: 300px;
}

.search-box svg {
    position: absolute;
    left: var(--space-md);
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-tertiary);
    pointer-events: none;
}

.search-box input {
    width: 100%;
    padding: var(--space-sm) var(--space-md) var(--space-sm) calc(var(--space-md) + 28px);
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: 24px;
    color: var(--text-primary);
    font-size: 0.875rem;
    transition: all var(--transition-fast);
}

.search-box input:focus {
    outline: none;
    border-color: var(--accent-primary);
    background: var(--bg-elevated);
}

.search-box input::placeholder {
    color: var(--text-tertiary);
}

/* Library Content */
.library-content {
    padding: var(--space-2xl) 0;
    min-height: 60vh;
}

.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 var(--space-lg);
}

.narrative-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
    gap: var(--space-lg);
}

/* Narrative Cards */
.narrative-card {
    background: var(--bg-elevated);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    overflow: hidden;
    transition: all var(--transition-base);
    cursor: pointer;
    position: relative;
}

.narrative-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 20px 40px var(--shadow-color);
    border-color: var(--accent-primary);
}

.narrative-card.skeleton {
    cursor: default;
    pointer-events: none;
}

.card-image-wrapper {
    position: relative;
    width: 100%;
    padding-bottom: 50%;
    overflow: hidden;
    background: var(--bg-tertiary);
}

.card-image {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--transition-slow);
}

.narrative-card:hover .card-image {
    transform: scale(1.05);
}

.card-badge {
    position: absolute;
    top: var(--space-md);
    right: var(--space-md);
    background: var(--glass-bg);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border: 1px solid var(--glass-border);
    padding: var(--space-xs) var(--space-sm);
    border-radius: 20px;
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--text-primary);
}

.card-content {
    padding: var(--space-lg);
}

.card-title {
    font-family: var(--font-display);
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: var(--space-xs);
    color: var(--text-primary);
}

.card-author {
    font-size: 0.875rem;
    color: var(--accent-primary);
    margin-bottom: var(--space-md);
}

.card-description {
    font-size: 0.875rem;
    color: var(--text-secondary);
    line-height: 1.6;
    margin-bottom: var(--space-md);
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.card-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: var(--space-md);
    border-top: 1px solid var(--border-color);
}

.card-stats {
    display: flex;
    gap: var(--space-md);
}

.card-stat {
    display: flex;
    align-items: center;
    gap: var(--space-xs);
    font-size: 0.75rem;
    color: var(--text-tertiary);
}

.card-action {
    background: var(--accent-gradient);
    color: white;
    border: none;
    padding: var(--space-xs) var(--space-md);
    border-radius: 20px;
    font-size: 0.875rem;
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.card-action:hover {
    transform: scale(1.05);
    box-shadow: 0 4px 20px rgba(99, 102, 241, 0.3);
}

/* Progress display for cards */
.progress-action-container {
    display: flex;
    flex-direction: column;
    gap: var(--space-xs);
    align-items: flex-end;
}

.progress-info {
    display: flex;
    align-items: center;
    gap: var(--space-xs);
    font-size: 0.75rem;
    color: var(--text-secondary);
}

.progress-bar-container {
    width: 80px;
    height: 4px;
    background: var(--border-color);
    border-radius: 2px;
    overflow: hidden;
}

.progress-bar-fill {
    height: 100%;
    background: var(--accent-gradient);
    transition: width var(--transition-base);
}

.progress-text {
    white-space: nowrap;
}

.card-action.continue-reading {
    background: linear-gradient(135deg, #10b981 0%, #3b82f6 100%);
}

.card-action.continue-reading:hover {
    box-shadow: 0 4px 20px rgba(16, 185, 129, 0.3);
}

/* Skeleton Loading */
.skeleton-image {
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, var(--bg-tertiary) 0%, var(--bg-secondary) 50%, var(--bg-tertiary) 100%);
    background-size: 200% 100%;
    animation: skeleton 1.5s ease-in-out infinite;
}

.skeleton-title,
.skeleton-author,
.skeleton-description {
    height: 1em;
    background: linear-gradient(90deg, var(--bg-tertiary) 0%, var(--bg-secondary) 50%, var(--bg-tertiary) 100%);
    background-size: 200% 100%;
    animation: skeleton 1.5s ease-in-out infinite;
    border-radius: 4px;
    margin-bottom: var(--space-sm);
}

.skeleton-title {
    width: 80%;
    height: 1.5em;
}

.skeleton-author {
    width: 40%;
    height: 0.875em;
}

.skeleton-description {
    width: 100%;
    height: 3em;
}

@keyframes skeleton {
    0% { background-position: 200% 0; }
    100% { background-position: -200% 0; }
}

/* Modal */
.modal {
    position: fixed;
    inset: 0;
    z-index: var(--z-modal);
    display: none;
    align-items: center;
    justify-content: center;
    padding: var(--space-lg);
}

.modal.active {
    display: flex;
}

.modal-backdrop {
    position: absolute;
    inset: 0;
    background: rgba(0, 0, 0, 0.8);
    backdrop-filter: blur(5px);
    -webkit-backdrop-filter: blur(5px);
}

.modal-content {
    position: relative;
    max-width: 900px;
    width: 100%;
    max-height: 90vh;
    background: var(--bg-elevated);
    border: 1px solid var(--border-color);
    border-radius: 24px;
    overflow: hidden;
    animation: modalSlideIn var(--transition-slow) ease-out;
}

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

.modal-close {
    position: absolute;
    top: var(--space-md);
    right: var(--space-md);
    background: var(--glass-bg);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border: 1px solid var(--glass-border);
    color: var(--text-secondary);
    width: 40px;
    height: 40px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all var(--transition-fast);
    z-index: 1;
}

.modal-close:hover {
    background: var(--accent-primary);
    color: white;
    border-color: transparent;
}

.modal-body {
    overflow-y: auto;
    max-height: 90vh;
}

/* Footer */
.footer {
    background: var(--bg-secondary);
    border-top: 1px solid var(--border-color);
    padding: var(--space-xl) 0 var(--space-lg);
}

.footer-content {
    display: grid;
    grid-template-columns: 1.5fr repeat(4, 1fr);
    gap: var(--space-lg);
    margin-bottom: var(--space-xl);
}

.footer-section h3,
.footer-section h4 {
    margin-bottom: var(--space-sm);
    font-weight: 600;
    font-size: 0.875rem;
    white-space: nowrap;
}

.footer-section p {
    color: var(--text-secondary);
    line-height: 1.5;
    font-size: 0.813rem;
}

.footer-section a {
    display: block;
    color: var(--text-secondary);
    text-decoration: none;
    margin-bottom: 0.375rem;
    transition: color var(--transition-fast);
    font-size: 0.813rem;
}

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

.footer-bottom {
    padding-top: var(--space-xl);
    border-top: 1px solid var(--border-color);
    text-align: center;
    color: var(--text-tertiary);
    font-size: 0.875rem;
}

/* Responsive Design */
@media (max-width: 1024px) {
    .footer-content {
        grid-template-columns: 1.2fr repeat(4, 1fr);
        gap: var(--space-md);
    }
    
    .footer-section h3,
    .footer-section h4 {
        font-size: 0.813rem;
    }
    
    .footer-section a,
    .footer-section p {
        font-size: 0.75rem;
    }
}

@media (max-width: 768px) {
    .nav-menu {
        display: none;
    }

    .filters .container {
        flex-direction: column;
        align-items: stretch;
    }

    .search-box {
        width: 100%;
    }

    .narrative-grid {
        grid-template-columns: 1fr;
    }

    .hero-stats {
        flex-direction: column;
        gap: var(--space-lg);
    }

    .footer-content {
        grid-template-columns: 1fr;
    }
}

@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}