/* ============================================
   Helium AI eBook Generator - Styles
   ============================================ */

/* CSS Variables - Design System */
:root {
    /* Primary Colors */
    --primary-50: #eef2ff;
    --primary-100: #e0e7ff;
    --primary-200: #c7d2fe;
    --primary-300: #a5b4fc;
    --primary-400: #818cf8;
    --primary-500: #6366f1;
    --primary-600: #4f46e5;
    --primary-700: #4338ca;
    --primary-800: #3730a3;
    --primary-900: #312e81;
    
    /* Neutral Colors */
    --gray-50: #f9fafb;
    --gray-100: #f3f4f6;
    --gray-200: #e5e7eb;
    --gray-300: #d1d5db;
    --gray-400: #9ca3af;
    --gray-500: #6b7280;
    --gray-600: #4b5563;
    --gray-700: #374151;
    --gray-800: #1f2937;
    --gray-900: #111827;
    
    /* Semantic Colors */
    --success: #10b981;
    --warning: #f59e0b;
    --error: #ef4444;
    --info: #3b82f6;
    
    /* Typography */
    --font-display: 'Playfair Display', serif;
    --font-body: 'Plus Jakarta Sans', sans-serif;
    --font-mono: 'Space Grotesk', monospace;
    
    /* Spacing */
    --space-1: 0.25rem;
    --space-2: 0.5rem;
    --space-3: 0.75rem;
    --space-4: 1rem;
    --space-5: 1.25rem;
    --space-6: 1.5rem;
    --space-8: 2rem;
    --space-10: 2.5rem;
    --space-12: 3rem;
    --space-16: 4rem;
    --space-20: 5rem;
    --space-24: 6rem;
    
    /* Border Radius */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --radius-2xl: 1.5rem;
    --radius-full: 9999px;
    
    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
    --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1), 0 8px 10px -6px rgb(0 0 0 / 0.1);
    --shadow-2xl: 0 25px 50px -12px rgb(0 0 0 / 0.25);
    
    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-base: 250ms ease;
    --transition-slow: 350ms ease;
    
    /* Layout */
    --sidebar-width: 280px;
    --sidebar-collapsed: 80px;
    --header-height: 80px;
}

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

html {
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font-body);
    font-size: 1rem;
    line-height: 1.6;
    color: var(--gray-800);
    background: var(--gray-50);
    min-height: 100vh;
}

/* App Layout */
#app {
    display: flex;
    min-height: 100vh;
}

/* Sidebar */
.sidebar {
    width: var(--sidebar-width);
    background: white;
    border-right: 1px solid var(--gray-200);
    display: flex;
    flex-direction: column;
    position: fixed;
    height: 100vh;
    z-index: 100;
    transition: width var(--transition-base);
}

.sidebar.collapsed {
    width: var(--sidebar-collapsed);
}

.sidebar-header {
    padding: var(--space-6);
    display: flex;
    align-items: center;
    justify-content: space-between;
    border-bottom: 1px solid var(--gray-100);
}

.logo {
    display: flex;
    align-items: center;
    gap: var(--space-3);
}

.logo-text {
    font-family: var(--font-display);
    font-size: 1.5rem;
    font-weight: 700;
    background: linear-gradient(135deg, var(--primary-600), var(--primary-500));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.sidebar.collapsed .logo-text {
    display: none;
}

.sidebar-toggle {
    background: none;
    border: none;
    color: var(--gray-500);
    cursor: pointer;
    padding: var(--space-2);
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
}

.sidebar-toggle:hover {
    background: var(--gray-100);
    color: var(--gray-700);
}

.sidebar-nav {
    flex: 1;
    padding: var(--space-4);
    display: flex;
    flex-direction: column;
    gap: var(--space-1);
}

.nav-item {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    padding: var(--space-3) var(--space-4);
    color: var(--gray-600);
    text-decoration: none;
    border-radius: var(--radius-lg);
    transition: all var(--transition-fast);
    font-weight: 500;
}

.nav-item svg {
    flex-shrink: 0;
}

.nav-item:hover {
    background: var(--gray-100);
    color: var(--gray-800);
}

.nav-item.active {
    background: linear-gradient(135deg, var(--primary-600), var(--primary-500));
    color: white;
}

.sidebar.collapsed .nav-item span {
    display: none;
}

.sidebar-footer {
    padding: var(--space-4) var(--space-6);
    border-top: 1px solid var(--gray-100);
}

.user-profile {
    display: flex;
    align-items: center;
    gap: var(--space-3);
}

.user-avatar {
    width: 40px;
    height: 40px;
    border-radius: var(--radius-full);
    background: linear-gradient(135deg, var(--primary-500), var(--primary-600));
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-weight: 600;
    font-size: 0.875rem;
}

.user-info {
    display: flex;
    flex-direction: column;
}

.user-name {
    font-weight: 600;
    color: var(--gray-800);
    font-size: 0.875rem;
}

.user-plan {
    font-size: 0.75rem;
    color: var(--gray-500);
}

.sidebar.collapsed .user-info {
    display: none;
}

/* Main Content */
.main-content {
    flex: 1;
    margin-left: var(--sidebar-width);
    display: flex;
    flex-direction: column;
    min-height: 100vh;
    transition: margin-left var(--transition-base);
}

.sidebar.collapsed + .main-content {
    margin-left: var(--sidebar-collapsed);
}

/* Header */
.header {
    height: var(--header-height);
    background: white;
    border-bottom: 1px solid var(--gray-200);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 var(--space-8);
    position: sticky;
    top: 0;
    z-index: 50;
}

.header-left {
    display: flex;
    flex-direction: column;
    gap: var(--space-1);
}

.page-title {
    font-family: var(--font-display);
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--gray-900);
}

.page-subtitle {
    font-size: 0.875rem;
    color: var(--gray-500);
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-2);
    padding: var(--space-3) var(--space-5);
    font-family: var(--font-body);
    font-size: 0.875rem;
    font-weight: 600;
    border-radius: var(--radius-lg);
    border: none;
    cursor: pointer;
    transition: all var(--transition-fast);
    text-decoration: none;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary-600), var(--primary-500));
    color: white;
    box-shadow: 0 4px 14px 0 rgba(99, 102, 241, 0.39);
}

.btn-primary:hover {
    transform: translateY(-1px);
    box-shadow: 0 6px 20px 0 rgba(99, 102, 241, 0.5);
}

.btn-secondary {
    background: white;
    color: var(--gray-700);
    border: 1px solid var(--gray-300);
}

.btn-secondary:hover {
    background: var(--gray-50);
    border-color: var(--gray-400);
}

.btn-large {
    padding: var(--space-4) var(--space-8);
    font-size: 1rem;
}

/* Views Container */
.views-container {
    flex: 1;
    padding: var(--space-8);
    overflow-y: auto;
}

.view {
    display: none;
    animation: fadeIn 0.3s ease;
}

.view.active {
    display: block;
}

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

/* Dashboard View */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: var(--space-6);
    margin-bottom: var(--space-10);
}

.stat-card {
    background: white;
    border-radius: var(--radius-xl);
    padding: var(--space-6);
    display: flex;
    align-items: center;
    gap: var(--space-4);
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--gray-100);
    transition: all var(--transition-fast);
}

.stat-card:hover {
    box-shadow: var(--shadow-md);
    transform: translateY(-2px);
}

.stat-icon {
    width: 56px;
    height: 56px;
    border-radius: var(--radius-lg);
    background: linear-gradient(135deg, var(--primary-100), var(--primary-50));
    color: var(--primary-600);
    display: flex;
    align-items: center;
    justify-content: center;
}

.stat-content {
    display: flex;
    flex-direction: column;
}

.stat-value {
    font-size: 2rem;
    font-weight: 700;
    color: var(--gray-900);
    line-height: 1;
}

.stat-label {
    font-size: 0.875rem;
    color: var(--gray-500);
    margin-top: var(--space-1);
}

.section-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: var(--space-6);
}

.section-header h2 {
    font-family: var(--font-display);
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--gray-800);
}

.view-all {
    color: var(--primary-600);
    text-decoration: none;
    font-weight: 500;
    font-size: 0.875rem;
    display: flex;
    align-items: center;
    gap: var(--space-1);
}

.view-all:hover {
    color: var(--primary-700);
}

/* eBooks Grid */
.ebooks-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: var(--space-6);
}

.ebook-card {
    background: white;
    border-radius: var(--radius-xl);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--gray-100);
    transition: all var(--transition-base);
    cursor: pointer;
}

.ebook-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-xl);
}

.ebook-cover {
    aspect-ratio: 3/4;
    position: relative;
    overflow: hidden;
}

.ebook-cover img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--transition-slow);
}

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

.ebook-cover-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(to top, rgba(0,0,0,0.7) 0%, transparent 50%);
    opacity: 0;
    transition: opacity var(--transition-fast);
    display: flex;
    align-items: flex-end;
    padding: var(--space-4);
}

.ebook-card:hover .ebook-cover-overlay {
    opacity: 1;
}

.ebook-actions {
    display: flex;
    gap: var(--space-2);
}

.ebook-action-btn {
    width: 36px;
    height: 36px;
    border-radius: var(--radius-md);
    background: white;
    border: none;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    color: var(--gray-700);
    transition: all var(--transition-fast);
}

.ebook-action-btn:hover {
    background: var(--primary-500);
    color: white;
}

.ebook-info {
    padding: var(--space-5);
}

.ebook-title {
    font-weight: 600;
    color: var(--gray-800);
    margin-bottom: var(--space-1);
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.ebook-meta {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    font-size: 0.75rem;
    color: var(--gray-500);
}

/* Empty State */
.empty-state {
    text-align: center;
    padding: var(--space-20) var(--space-8);
    display: none;
}

.empty-state.active {
    display: block;
}

.empty-icon {
    width: 120px;
    height: 120px;
    margin: 0 auto var(--space-6);
    border-radius: var(--radius-full);
    background: var(--gray-100);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--gray-400);
}

.empty-state h3 {
    font-family: var(--font-display);
    font-size: 1.5rem;
    color: var(--gray-800);
    margin-bottom: var(--space-2);
}

.empty-state p {
    color: var(--gray-500);
    margin-bottom: var(--space-6);
}

/* Create eBook View */
.create-container {
    max-width: 900px;
    margin: 0 auto;
}

.create-steps {
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: var(--space-10);
    gap: var(--space-2);
}

.step {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-2);
    opacity: 0.5;
    transition: opacity var(--transition-fast);
}

.step.active {
    opacity: 1;
}

.step.completed {
    opacity: 1;
}

.step-number {
    width: 40px;
    height: 40px;
    border-radius: var(--radius-full);
    background: var(--gray-200);
    color: var(--gray-600);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
    font-size: 0.875rem;
    transition: all var(--transition-fast);
}

.step.active .step-number {
    background: linear-gradient(135deg, var(--primary-600), var(--primary-500));
    color: white;
}

.step.completed .step-number {
    background: var(--success);
    color: white;
}

.step-label {
    font-size: 0.75rem;
    font-weight: 500;
    color: var(--gray-600);
}

.step-connector {
    width: 60px;
    height: 2px;
    background: var(--gray-200);
    margin: 0 var(--space-2);
    margin-bottom: var(--space-6);
}

.step-content {
    display: none;
}

.step-content.active {
    display: block;
    animation: slideIn 0.4s ease;
}

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

.step-header {
    text-align: center;
    margin-bottom: var(--space-8);
}

.step-header h2 {
    font-family: var(--font-display);
    font-size: 2rem;
    color: var(--gray-900);
    margin-bottom: var(--space-3);
}

.step-header p {
    color: var(--gray-500);
    font-size: 1.125rem;
}

/* Prompt Input */
.prompt-container {
    background: white;
    border-radius: var(--radius-2xl);
    padding: var(--space-8);
    box-shadow: var(--shadow-lg);
    border: 1px solid var(--gray-100);
}

.prompt-input-wrapper {
    margin-bottom: var(--space-6);
}

.prompt-input {
    width: 100%;
    padding: var(--space-5);
    border: 2px solid var(--gray-200);
    border-radius: var(--radius-xl);
    font-family: var(--font-body);
    font-size: 1rem;
    resize: vertical;
    min-height: 120px;
    transition: all var(--transition-fast);
}

.prompt-input:focus {
    outline: none;
    border-color: var(--primary-500);
    box-shadow: 0 0 0 4px var(--primary-100);
}

.prompt-suggestions {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    margin-top: var(--space-4);
    flex-wrap: wrap;
}

.suggestion-label {
    font-size: 0.875rem;
    color: var(--gray-500);
}

.suggestion-chip {
    padding: var(--space-2) var(--space-3);
    background: var(--gray-100);
    border: none;
    border-radius: var(--radius-full);
    font-size: 0.75rem;
    color: var(--gray-600);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.suggestion-chip:hover {
    background: var(--primary-100);
    color: var(--primary-700);
}

/* Options */
.prompt-options {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-6);
    margin-bottom: var(--space-8);
    padding-top: var(--space-6);
    border-top: 1px solid var(--gray-100);
}

.option-group label {
    display: block;
    font-weight: 600;
    color: var(--gray-700);
    margin-bottom: var(--space-3);
    font-size: 0.875rem;
}

.option-buttons {
    display: flex;
    gap: var(--space-2);
    flex-wrap: wrap;
}

.option-btn {
    padding: var(--space-2) var(--space-4);
    background: white;
    border: 1px solid var(--gray-300);
    border-radius: var(--radius-lg);
    font-size: 0.875rem;
    color: var(--gray-600);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.option-btn:hover {
    border-color: var(--primary-400);
    color: var(--primary-600);
}

.option-btn.active {
    background: var(--primary-50);
    border-color: var(--primary-500);
    color: var(--primary-700);
}

.option-select {
    width: 100%;
    padding: var(--space-3) var(--space-4);
    border: 1px solid var(--gray-300);
    border-radius: var(--radius-lg);
    font-family: var(--font-body);
    font-size: 0.875rem;
    color: var(--gray-700);
    background: white;
    cursor: pointer;
}

/* Style Selection */
.style-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: var(--space-5);
    margin-bottom: var(--space-8);
}

.style-card {
    background: white;
    border-radius: var(--radius-xl);
    overflow: hidden;
    border: 2px solid transparent;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.style-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.style-card.active {
    border-color: var(--primary-500);
    box-shadow: 0 0 0 4px var(--primary-100);
}

.style-preview {
    aspect-ratio: 3/4;
    padding: var(--space-5);
    display: flex;
    flex-direction: column;
    justify-content: center;
    gap: var(--space-3);
}

.modern-preview {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
}

.business-preview {
    background: linear-gradient(135deg, #1e3a5f 0%, #2d5a87 100%);
}

.educational-preview {
    background: linear-gradient(135deg, #f59e0b 0%, #d97706 100%);
}

.minimal-preview {
    background: linear-gradient(135deg, #f3f4f6 0%, #e5e7eb 100%);
}

.creative-preview {
    background: linear-gradient(135deg, #ec4899 0%, #8b5cf6 100%);
}

.preview-title {
    font-family: var(--font-display);
    font-size: 1.25rem;
    font-weight: 700;
    color: white;
}

.minimal-preview .preview-title {
    color: var(--gray-800);
}

.preview-line {
    height: 4px;
    background: rgba(255,255,255,0.5);
    border-radius: var(--radius-full);
    width: 80%;
}

.preview-line.short {
    width: 50%;
}

.minimal-preview .preview-line {
    background: var(--gray-400);
}

.style-info {
    padding: var(--space-4);
}

.style-info h3 {
    font-weight: 600;
    color: var(--gray-800);
    margin-bottom: var(--space-1);
    font-size: 1rem;
}

.style-info p {
    font-size: 0.75rem;
    color: var(--gray-500);
    line-height: 1.5;
}

.step-actions {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

/* Generation Animation */
.generation-container {
    text-align: center;
    padding: var(--space-12);
}

.generation-animation {
    position: relative;
    width: 200px;
    height: 200px;
    margin: 0 auto var(--space-8);
}

.book-spine {
    position: absolute;
    left: 50%;
    top: 50%;
    transform: translate(-50%, -50%);
    width: 60px;
    height: 140px;
    background: linear-gradient(90deg, var(--primary-700), var(--primary-600));
    border-radius: 4px 0 0 4px;
    box-shadow: -4px 4px 20px rgba(99, 102, 241, 0.3);
    animation: bookFloat 3s ease-in-out infinite;
}

.book-pages {
    position: absolute;
    left: 50%;
    top: 50%;
    transform: translate(-40%, -50%);
    width: 100px;
    height: 130px;
    animation: bookFloat 3s ease-in-out infinite;
}

.book-pages .page {
    position: absolute;
    right: 0;
    width: 100%;
    height: 100%;
    background: white;
    border-radius: 0 4px 4px 0;
    box-shadow: 2px 2px 10px rgba(0,0,0,0.1);
    animation: pageFlip 2s ease-in-out infinite;
}

.book-pages .page:nth-child(1) { animation-delay: 0s; }
.book-pages .page:nth-child(2) { animation-delay: 0.2s; right: 3px; }
.book-pages .page:nth-child(3) { animation-delay: 0.4s; right: 6px; }

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

@keyframes pageFlip {
    0%, 100% { transform: rotateY(0deg); }
    50% { transform: rotateY(-15deg); }
}

.generation-particles {
    position: absolute;
    inset: 0;
}

.generation-particles span {
    position: absolute;
    width: 8px;
    height: 8px;
    background: var(--primary-400);
    border-radius: 50%;
    animation: particleFloat 2s ease-in-out infinite;
}

.generation-particles span:nth-child(1) { top: 20%; left: 20%; animation-delay: 0s; }
.generation-particles span:nth-child(2) { top: 30%; right: 20%; animation-delay: 0.3s; }
.generation-particles span:nth-child(3) { bottom: 30%; left: 25%; animation-delay: 0.6s; }
.generation-particles span:nth-child(4) { bottom: 20%; right: 25%; animation-delay: 0.9s; }
.generation-particles span:nth-child(5) { top: 50%; left: 10%; animation-delay: 1.2s; }
.generation-particles span:nth-child(6) { top: 50%; right: 10%; animation-delay: 1.5s; }

@keyframes particleFloat {
    0%, 100% { transform: translateY(0) scale(1); opacity: 0.5; }
    50% { transform: translateY(-20px) scale(1.2); opacity: 1; }
}

.generation-status h2 {
    font-family: var(--font-display);
    font-size: 1.75rem;
    color: var(--gray-900);
    margin-bottom: var(--space-2);
}

.generation-status p {
    color: var(--gray-500);
    font-size: 1rem;
}

.generation-progress {
    max-width: 400px;
    margin: var(--space-8) auto;
}

.progress-bar {
    height: 8px;
    background: var(--gray-200);
    border-radius: var(--radius-full);
    overflow: hidden;
    margin-bottom: var(--space-3);
}

.progress-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--primary-500), var(--primary-600));
    border-radius: var(--radius-full);
    width: 0%;
    transition: width 0.3s ease;
}

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

.generation-steps {
    display: flex;
    justify-content: center;
    gap: var(--space-8);
    flex-wrap: wrap;
}

.gen-step {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    color: var(--gray-400);
    font-size: 0.875rem;
    transition: color var(--transition-fast);
}

.gen-step.active {
    color: var(--primary-600);
}

.gen-step svg {
    opacity: 0.5;
}

.gen-step.active svg {
    opacity: 1;
}

/* Preview Container */
.preview-container {
    background: white;
    border-radius: var(--radius-2xl);
    overflow: hidden;
    box-shadow: var(--shadow-lg);
    border: 1px solid var(--gray-100);
}

.preview-toolbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--space-4) var(--space-6);
    border-bottom: 1px solid var(--gray-100);
    background: var(--gray-50);
}

.toolbar-left, .toolbar-right {
    display: flex;
    align-items: center;
    gap: var(--space-2);
}

.toolbar-btn {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-2) var(--space-3);
    background: white;
    border: 1px solid var(--gray-200);
    border-radius: var(--radius-md);
    font-size: 0.875rem;
    color: var(--gray-600);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.toolbar-btn:hover {
    background: var(--gray-100);
}

.toolbar-btn.active {
    background: var(--primary-50);
    border-color: var(--primary-200);
    color: var(--primary-700);
}

.toolbar-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.toolbar-divider {
    width: 1px;
    height: 24px;
    background: var(--gray-300);
    margin: 0 var(--space-2);
}

.page-indicator {
    font-size: 0.875rem;
    color: var(--gray-600);
    font-weight: 500;
    min-width: 60px;
    text-align: center;
}

.preview-area {
    min-height: 600px;
    max-height: 700px;
    overflow-y: auto;
    padding: var(--space-8);
    background: var(--gray-100);
}

.preview-actions {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--space-5) var(--space-6);
    border-top: 1px solid var(--gray-100);
    background: white;
}

.export-buttons {
    display: flex;
    gap: var(--space-3);
}

/* eBook Preview Styles */
.ebook-preview {
    max-width: 600px;
    margin: 0 auto;
    background: white;
    box-shadow: var(--shadow-xl);
    border-radius: var(--radius-lg);
    overflow: hidden;
}

.ebook-preview-cover {
    aspect-ratio: 3/4;
    display: flex;
    flex-direction: column;
    justify-content: flex-end;
    padding: var(--space-8);
    position: relative;
    overflow: hidden;
}

.ebook-preview-cover::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, var(--primary-600), var(--primary-800));
}

.ebook-preview-cover.modern::before {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
}

.ebook-preview-cover.business::before {
    background: linear-gradient(135deg, #1e3a5f 0%, #2d5a87 100%);
}

.ebook-preview-cover.educational::before {
    background: linear-gradient(135deg, #f59e0b 0%, #d97706 100%);
}

.ebook-preview-cover.minimal::before {
    background: linear-gradient(135deg, #f3f4f6 0%, #e5e7eb 100%);
}

.ebook-preview-cover.creative::before {
    background: linear-gradient(135deg, #ec4899 0%, #8b5cf6 100%);
}

.ebook-preview-cover-content {
    position: relative;
    z-index: 1;
}

.ebook-preview-title {
    font-family: var(--font-display);
    font-size: 2.5rem;
    font-weight: 700;
    color: white;
    margin-bottom: var(--space-4);
    line-height: 1.2;
}

.ebook-preview-cover.minimal .ebook-preview-title {
    color: var(--gray-900);
}

.ebook-preview-subtitle {
    font-size: 1.125rem;
    color: rgba(255,255,255,0.8);
    margin-bottom: var(--space-6);
}

.ebook-preview-cover.minimal .ebook-preview-subtitle {
    color: var(--gray-600);
}

.ebook-preview-author {
    font-size: 1rem;
    color: rgba(255,255,255,0.6);
}

.ebook-preview-cover.minimal .ebook-preview-author {
    color: var(--gray-500);
}

.ebook-preview-toc {
    padding: var(--space-8);
}

.ebook-preview-toc h2 {
    font-family: var(--font-display);
    font-size: 2rem;
    color: var(--gray-900);
    margin-bottom: var(--space-6);
    padding-bottom: var(--space-4);
    border-bottom: 2px solid var(--gray-200);
}

.toc-list {
    list-style: none;
}

.toc-item {
    display: flex;
    align-items: baseline;
    justify-content: space-between;
    padding: var(--space-3) 0;
    border-bottom: 1px dotted var(--gray-300);
}

.toc-item:last-child {
    border-bottom: none;
}

.toc-number {
    font-weight: 600;
    color: var(--primary-600);
    margin-right: var(--space-3);
}

.toc-title {
    flex: 1;
    color: var(--gray-700);
}

.toc-page {
    color: var(--gray-400);
    font-size: 0.875rem;
}

.ebook-preview-page {
    padding: var(--space-8);
    min-height: 600px;
}

.ebook-preview-page h2 {
    font-family: var(--font-display);
    font-size: 1.75rem;
    color: var(--gray-900);
    margin-bottom: var(--space-6);
    padding-bottom: var(--space-4);
    border-bottom: 2px solid var(--primary-200);
}

.ebook-preview-page h3 {
    font-size: 1.25rem;
    color: var(--gray-800);
    margin-top: var(--space-6);
    margin-bottom: var(--space-3);
}

.ebook-preview-page p {
    color: var(--gray-600);
    margin-bottom: var(--space-4);
    line-height: 1.8;
}

/* Library View */
.library-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: var(--space-6);
    gap: var(--space-4);
}

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

.search-box svg {
    position: absolute;
    left: var(--space-3);
    top: 50%;
    transform: translateY(-50%);
    color: var(--gray-400);
}

.search-box input {
    width: 100%;
    padding: var(--space-3) var(--space-4) var(--space-3) var(--space-10);
    border: 1px solid var(--gray-300);
    border-radius: var(--radius-lg);
    font-family: var(--font-body);
    font-size: 0.875rem;
    transition: all var(--transition-fast);
}

.search-box input:focus {
    outline: none;
    border-color: var(--primary-500);
    box-shadow: 0 0 0 3px var(--primary-100);
}

.filter-dropdown select {
    padding: var(--space-3) var(--space-8) var(--space-3) var(--space-4);
    border: 1px solid var(--gray-300);
    border-radius: var(--radius-lg);
    font-family: var(--font-body);
    font-size: 0.875rem;
    background: white;
    cursor: pointer;
}

/* Templates View */
.templates-header {
    text-align: center;
    margin-bottom: var(--space-10);
}

.templates-header h2 {
    font-family: var(--font-display);
    font-size: 2rem;
    color: var(--gray-900);
    margin-bottom: var(--space-3);
}

.templates-header p {
    color: var(--gray-500);
    font-size: 1.125rem;
}

.templates-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: var(--space-6);
}

.template-card {
    background: white;
    border-radius: var(--radius-xl);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--gray-100);
    transition: all var(--transition-base);
}

.template-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-xl);
}

.template-preview {
    aspect-ratio: 16/10;
    position: relative;
    overflow: hidden;
}

.template-preview img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.template-overlay {
    position: absolute;
    inset: 0;
    background: rgba(0,0,0,0.5);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: opacity var(--transition-fast);
}

.template-card:hover .template-overlay {
    opacity: 1;
}

.template-info {
    padding: var(--space-5);
}

.template-info h3 {
    font-weight: 600;
    color: var(--gray-800);
    margin-bottom: var(--space-1);
}

.template-info p {
    font-size: 0.875rem;
    color: var(--gray-500);
}

/* Modal */
.modal {
    display: none;
    position: fixed;
    inset: 0;
    z-index: 1000;
    align-items: center;
    justify-content: center;
}

.modal.active {
    display: flex;
}

.modal-overlay {
    position: absolute;
    inset: 0;
    background: rgba(0,0,0,0.5);
    backdrop-filter: blur(4px);
}

.modal-content {
    position: relative;
    background: white;
    border-radius: var(--radius-2xl);
    width: 90%;
    max-width: 600px;
    max-height: 90vh;
    overflow: hidden;
    box-shadow: var(--shadow-2xl);
    animation: modalIn 0.3s ease;
}

@keyframes modalIn {
    from { opacity: 0; transform: scale(0.95); }
    to { opacity: 1; transform: scale(1); }
}

.modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--space-5) var(--space-6);
    border-bottom: 1px solid var(--gray-100);
}

.modal-header h3 {
    font-weight: 600;
    color: var(--gray-800);
}

.modal-close {
    background: none;
    border: none;
    color: var(--gray-400);
    cursor: pointer;
    padding: var(--space-2);
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
}

.modal-close:hover {
    background: var(--gray-100);
    color: var(--gray-600);
}

.modal-body {
    padding: var(--space-6);
    max-height: 60vh;
    overflow-y: auto;
}

.editor-toolbar {
    display: flex;
    gap: var(--space-2);
    margin-bottom: var(--space-4);
    padding: var(--space-3);
    background: var(--gray-50);
    border-radius: var(--radius-lg);
}

.editor-btn {
    width: 36px;
    height: 36px;
    background: white;
    border: 1px solid var(--gray-200);
    border-radius: var(--radius-md);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-fast);
}

.editor-btn:hover {
    background: var(--gray-100);
}

.editor-textarea {
    width: 100%;
    padding: var(--space-4);
    border: 1px solid var(--gray-300);
    border-radius: var(--radius-lg);
    font-family: var(--font-body);
    font-size: 0.875rem;
    line-height: 1.6;
    resize: vertical;
    min-height: 200px;
}

.editor-textarea:focus {
    outline: none;
    border-color: var(--primary-500);
}

.modal-footer {
    display: flex;
    justify-content: flex-end;
    gap: var(--space-3);
    padding: var(--space-4) var(--space-6);
    border-top: 1px solid var(--gray-100);
    background: var(--gray-50);
}

/* Toast Notifications */
.toast-container {
    position: fixed;
    bottom: var(--space-6);
    right: var(--space-6);
    display: flex;
    flex-direction: column;
    gap: var(--space-3);
    z-index: 1001;
}

.toast {
    background: white;
    border-radius: var(--radius-lg);
    padding: var(--space-4) var(--space-5);
    box-shadow: var(--shadow-xl);
    display: flex;
    align-items: center;
    gap: var(--space-3);
    animation: toastIn 0.3s ease;
    border-left: 4px solid var(--success);
}

.toast.error {
    border-left-color: var(--error);
}

.toast.info {
    border-left-color: var(--info);
}

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

.toast-icon {
    width: 24px;
    height: 24px;
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
}

.toast.success .toast-icon {
    background: var(--success);
    color: white;
}

.toast.error .toast-icon {
    background: var(--error);
    color: white;
}

.toast.info .toast-icon {
    background: var(--info);
    color: white;
}

.toast-message {
    font-size: 0.875rem;
    color: var(--gray-700);
}

/* Responsive Design */
@media (max-width: 1024px) {
    .sidebar {
        transform: translateX(-100%);
    }
    
    .sidebar.open {
        transform: translateX(0);
    }
    
    .main-content {
        margin-left: 0;
    }
    
    .sidebar.collapsed + .main-content {
        margin-left: 0;
    }
    
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .header {
        padding: 0 var(--space-4);
    }
    
    .page-title {
        font-size: 1.25rem;
    }
    
    .views-container {
        padding: var(--space-4);
    }
    
    .stats-grid {
        grid-template-columns: 1fr;
    }
    
    .ebooks-grid {
        grid-template-columns: 1fr;
    }
    
    .style-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .prompt-options {
        grid-template-columns: 1fr;
    }
    
    .step-actions {
        flex-direction: column;
        gap: var(--space-3);
    }
    
    .step-actions .btn {
        width: 100%;
    }
    
    .preview-actions {
        flex-direction: column;
        gap: var(--space-3);
    }
    
    .export-buttons {
        width: 100%;
        flex-wrap: wrap;
    }
    
    .export-buttons .btn {
        flex: 1;
    }
    
    .library-header {
        flex-direction: column;
        align-items: stretch;
    }
    
    .search-box {
        max-width: none;
    }
}

@media (max-width: 480px) {
    .create-steps {
        gap: var(--space-1);
    }
    
    .step-connector {
        width: 30px;
    }
    
    .step-label {
        display: none;
    }
    
    .style-grid {
        grid-template-columns: 1fr;
    }
    
    .generation-steps {
        flex-direction: column;
        gap: var(--space-4);
    }
}

/* Print Styles */
@media print {
    .sidebar, .header, .preview-toolbar, .preview-actions {
        display: none;
    }
    
    .main-content {
        margin-left: 0;
    }
    
    .preview-area {
        max-height: none;
        overflow: visible;
    }
    
    .ebook-preview {
        box-shadow: none;
    }
}

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

::-webkit-scrollbar-track {
    background: var(--gray-100);
    border-radius: var(--radius-full);
}

::-webkit-scrollbar-thumb {
    background: var(--gray-300);
    border-radius: var(--radius-full);
}

::-webkit-scrollbar-thumb:hover {
    background: var(--gray-400);
}

/* Selection */
::selection {
    background: var(--primary-200);
    color: var(--primary-900);
}

/* Focus Styles */
*:focus-visible {
    outline: 2px solid var(--primary-500);
    outline-offset: 2px;
}

/* Loading States */
.loading {
    position: relative;
    pointer-events: none;
}

.loading::after {
    content: '';
    position: absolute;
    inset: 0;
    background: rgba(255,255,255,0.8);
    display: flex;
    align-items: center;
    justify-content: center;
}

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

.animate-pulse {
    animation: pulse 2s ease-in-out infinite;
}

@keyframes spin {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

.animate-spin {
    animation: spin 1s linear infinite;
}