/* CSS Variables for Premium Dark Theme */
:root {
    --bg-app: #09090c;
    --bg-sidebar: #101015;
    --bg-card: rgba(22, 22, 30, 0.7);
    --bg-input: #1a1a24;
    --border-color: rgba(255, 255, 255, 0.08);
    --border-focus: #6366f1;
    
    --text-primary: #f8fafc;
    --text-secondary: #94a3b8;
    --text-muted: #64748b;
    
    --color-primary: #6366f1;
    --color-secondary: #a855f7;
    --color-success: #10b981;
    --color-warning: #f59e0b;
    --color-danger: #ef4444;
    
    --gradient-primary: linear-gradient(135deg, #6366f1, #a855f7);
    --gradient-glass: linear-gradient(135deg, rgba(255, 255, 255, 0.03), rgba(255, 255, 255, 0.01));
    --shadow-premium: 0 20px 40px -15px rgba(0, 0, 0, 0.5);
    --shadow-glow: 0 0 20px rgba(99, 102, 241, 0.15);
    
    --font-header: 'Outfit', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    --font-body: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-book: 'Lora', Georgia, serif;
    
    --transition-smooth: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Reset and Core Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    background-color: var(--bg-app);
    color: var(--text-primary);
    font-family: var(--font-body);
    -webkit-font-smoothing: antialiased;
}

body.dashboard-active {
    overflow: hidden;
    height: 100vh;
}

/* App Container Layout */
.app-container {
    display: flex;
    height: 100vh;
    width: 100vw;
}

/* Sidebar Styling */
.sidebar {
    width: 320px;
    background-color: var(--bg-sidebar);
    border-right: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    padding: 24px;
    flex-shrink: 0;
    overflow-y: auto;
}

.logo-area {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 32px;
}

.logo-icon {
    width: 40px;
    height: 40px;
    background: var(--gradient-primary);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: var(--font-header);
    font-size: 22px;
    font-weight: 800;
    color: white;
    box-shadow: 0 0 15px rgba(99, 102, 241, 0.4);
}

.logo-text h1 {
    font-family: var(--font-header);
    font-size: 20px;
    font-weight: 700;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    line-height: 1.1;
}

.logo-text span {
    font-size: 11px;
    color: var(--text-muted);
    letter-spacing: 1px;
    text-transform: uppercase;
}

/* Stepper Component */
.stepper-box {
    margin-bottom: 32px;
}

.stepper-box h3,
.translation-log-box h3 {
    font-family: var(--font-header);
    font-size: 14px;
    font-weight: 600;
    color: var(--text-secondary);
    margin-bottom: 16px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.stepper {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 16px;
    position: relative;
}

.stepper::before {
    content: '';
    position: absolute;
    left: 15px;
    top: 15px;
    bottom: 15px;
    width: 2px;
    background-color: var(--border-color);
    z-index: 1;
}

.step {
    display: flex;
    align-items: center;
    gap: 16px;
    position: relative;
    z-index: 2;
}

.step-num {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    background-color: #1c1c24;
    border: 2px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 14px;
    font-weight: 600;
    color: var(--text-secondary);
    transition: var(--transition-smooth);
}

.step-label {
    font-size: 14px;
    font-weight: 500;
    color: var(--text-secondary);
    transition: var(--transition-smooth);
}

.step.active .step-num {
    background: var(--gradient-primary);
    border-color: transparent;
    color: white;
    box-shadow: 0 0 10px rgba(99, 102, 241, 0.3);
}

.step.active .step-label {
    color: var(--text-primary);
    font-weight: 600;
}

.step.completed .step-num {
    background-color: var(--color-success);
    border-color: transparent;
    color: white;
}

.step.completed .step-label {
    color: var(--text-secondary);
}

/* Translation Log / Glossary Box */
.translation-log-box {
    display: flex;
    flex-direction: column;
    flex-grow: 1;
    min-height: 250px;
    border-top: 1px solid var(--border-color);
    padding-top: 24px;
}

.box-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 12px;
}

.box-header h3 {
    margin-bottom: 0;
}

.log-search input {
    width: 100%;
    background-color: var(--bg-input);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 8px 12px;
    color: var(--text-primary);
    font-size: 13px;
    margin-bottom: 12px;
}

.log-search input:focus {
    outline: none;
    border-color: var(--border-focus);
}

.log-list-wrapper {
    flex-grow: 1;
    overflow-y: auto;
    max-height: calc(100vh - 580px);
}

.glossary-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.glossary-item {
    background-color: rgba(255, 255, 255, 0.02);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 10px 12px;
    display: flex;
    flex-direction: column;
    gap: 4px;
    position: relative;
    animation: fadeIn 0.3s ease-out;
}

.glossary-term-pair {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 13px;
}

.term-orig {
    font-weight: 600;
    color: var(--color-secondary);
}

.term-trans {
    font-weight: 600;
    color: var(--color-success);
}

.term-desc {
    font-size: 11px;
    color: var(--text-muted);
}

.btn-delete-term {
    position: absolute;
    right: 8px;
    top: 8px;
    background: none;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    font-size: 12px;
    display: none;
}

.glossary-item:hover .btn-delete-term {
    display: block;
}

.glossary-item:hover .btn-delete-term:hover {
    color: var(--color-danger);
}

.empty-log {
    font-size: 12px;
    color: var(--text-muted);
    text-align: center;
    padding: 24px 0;
    border: 1px dashed var(--border-color);
    border-radius: 8px;
}

/* Main Content Area */
.main-content {
    flex-grow: 1;
    display: flex;
    flex-direction: column;
    background-color: var(--bg-app);
    overflow: hidden;
}

/* Top Bar Styles */
.top-bar {
    height: 80px;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0 40px;
    background-color: var(--bg-sidebar);
}

.welcome-text h2 {
    font-family: var(--font-header);
    font-size: 20px;
    font-weight: 700;
    color: var(--text-primary);
}

.welcome-text p {
    font-size: 13px;
    color: var(--text-secondary);
}

.api-key-config {
    display: flex;
    align-items: center;
}

.input-group-row {
    display: flex;
    gap: 12px;
}

.input-with-icon {
    position: relative;
    display: flex;
    align-items: center;
}

.key-icon {
    position: absolute;
    left: 12px;
    width: 16px;
    height: 16px;
    color: var(--text-muted);
}

.input-with-icon input {
    background-color: var(--bg-input);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 10px 12px 10px 38px;
    color: var(--text-primary);
    font-size: 13px;
    width: 260px;
    transition: var(--transition-smooth);
}

.input-with-icon input:focus {
    outline: none;
    border-color: var(--border-focus);
    box-shadow: 0 0 10px rgba(99, 102, 241, 0.15);
}

.btn-icon {
    position: absolute;
    right: 10px;
    background: none;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    padding: 4px;
}

#gemini-model-select {
    background-color: var(--bg-input);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    color: var(--text-primary);
    padding: 0 12px;
    font-size: 13px;
    cursor: pointer;
    outline: none;
}

#gemini-model-select:focus {
    border-color: var(--border-focus);
}

/* Workspace & Tabs Manager */
.workspace {
    flex-grow: 1;
    padding: 40px;
    overflow-y: auto;
    display: flex;
    flex-direction: column;
}

.tab-pane {
    display: none;
    height: 100%;
}

.tab-pane.active {
    display: flex;
    flex-direction: column;
}

/* Cards & Layout Grid */
.grid-2-cols {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 32px;
    height: 100%;
}

.card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    box-shadow: var(--shadow-premium);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    display: flex;
    flex-direction: column;
    overflow: hidden;
    position: relative;
}

.card::before {
    content: '';
    position: absolute;
    inset: 0;
    border-radius: 16px;
    padding: 1px;
    background: linear-gradient(to bottom, rgba(255, 255, 255, 0.05), transparent);
    -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
    -webkit-mask-composite: xor;
    mask-composite: exclude;
    pointer-events: none;
}

.card-header {
    padding: 24px;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    gap: 16px;
}

.card-num {
    font-family: var(--font-header);
    font-size: 24px;
    font-weight: 800;
    color: var(--color-primary);
    opacity: 0.5;
}

.card-header h2 {
    font-family: var(--font-header);
    font-size: 18px;
    font-weight: 600;
    color: var(--text-primary);
}

.card-body {
    padding: 24px;
    overflow-y: auto;
}

.flex-column {
    display: flex;
    flex-direction: column;
    height: 100%;
}

/* Form Controls */
.form-group {
    margin-bottom: 20px;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.form-group label {
    font-size: 13px;
    font-weight: 600;
    color: var(--text-secondary);
}

.form-control {
    width: 100%;
    background-color: var(--bg-input);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 12px;
    color: var(--text-primary);
    font-size: 14px;
    font-family: var(--font-body);
    transition: var(--transition-smooth);
}

.form-control:focus {
    outline: none;
    border-color: var(--border-focus);
    box-shadow: var(--shadow-glow);
}

textarea.form-control {
    resize: none;
}

.flex-grow-textarea {
    flex-grow: 1;
    min-height: 120px;
}

/* Dropzone Styles */
.upload-dropzone {
    border: 2px dashed var(--border-color);
    border-radius: 12px;
    padding: 32px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 16px;
    text-align: center;
    background-color: rgba(255, 255, 255, 0.01);
    cursor: pointer;
    transition: var(--transition-smooth);
}

.upload-dropzone:hover,
.upload-dropzone.dragover {
    border-color: var(--color-primary);
    background-color: rgba(99, 102, 241, 0.05);
}

.upload-icon {
    width: 48px;
    height: 48px;
    color: var(--color-primary);
}

.upload-dropzone p {
    font-size: 14px;
    color: var(--text-secondary);
}

.upload-dropzone strong {
    color: var(--text-primary);
}

.file-name-indicator {
    font-size: 12px;
    color: var(--text-muted);
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    border-radius: 8px;
    font-family: var(--font-header);
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition-smooth);
    border: none;
    outline: none;
}

.btn-primary {
    background: var(--gradient-primary);
    color: white;
    box-shadow: 0 4px 15px rgba(99, 102, 241, 0.3);
}

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

.btn-secondary {
    background-color: #272733;
    border: 1px solid var(--border-color);
    color: var(--text-primary);
}

.btn-secondary:hover {
    background-color: #323242;
}

.btn-success {
    background-color: var(--color-success);
    color: white;
    box-shadow: 0 4px 15px rgba(16, 185, 129, 0.3);
}

.btn-success:hover {
    background-color: #0ea5e9;
    box-shadow: 0 6px 20px rgba(16, 185, 129, 0.5);
    transform: translateY(-1px);
}

.btn-outline {
    background: transparent;
    border: 1.5px solid var(--border-color);
    color: var(--text-primary);
}

.btn-outline:hover {
    border-color: var(--text-secondary);
    background-color: rgba(255, 255, 255, 0.02);
}

.btn-text {
    background: none;
    border: none;
    color: var(--color-primary);
    font-size: 12px;
    font-weight: 600;
    cursor: pointer;
}

.btn-text:hover {
    text-decoration: underline;
}

.btn-lg {
    padding: 14px 28px;
    font-size: 15px;
}

.btn-sm {
    padding: 8px 16px;
    font-size: 12px;
}

.btn-full {
    width: 100%;
    padding: 12px;
}

.btn-arrow {
    width: 16px;
    height: 16px;
    transition: var(--transition-smooth);
}

.btn:hover .btn-arrow {
    transform: translateX(4px);
}

.action-bar {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.chunk-info-label {
    font-size: 13px;
    color: var(--text-secondary);
}

/* Margin Helpers */
.margin-top-sm { margin-top: 8px; }
.margin-top-md { margin-top: 16px; }
.margin-top-lg { margin-top: 24px; }
.margin-top-xl { margin-top: 32px; }
.margin-top-auto { margin-top: auto; }
.flex-grow { flex-grow: 1; }
.center-content { display: flex; justify-content: center; }

/* Active Translation Dashboard Layout */
.progress-card {
    padding: 20px 24px;
    margin-bottom: 24px;
}

.progress-details {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 12px;
}

.progress-info h3 {
    font-family: var(--font-header);
    font-size: 16px;
    font-weight: 600;
}

.progress-info p {
    font-size: 12px;
    color: var(--text-secondary);
}

.progress-bar-container {
    height: 8px;
    background-color: var(--bg-input);
    border-radius: 4px;
    overflow: hidden;
}

.progress-bar-fill {
    height: 100%;
    background: var(--gradient-primary);
    border-radius: 4px;
    width: 0%;
    transition: width 0.4s ease;
}

.grid-main-workspace {
    display: grid;
    grid-template-columns: 1fr 340px;
    gap: 24px;
    flex-grow: 1;
    overflow: hidden;
}

.main-workspace-card {
    height: 100%;
}

/* Workspace Tabs */
.workspace-tabs-header {
    display: flex;
    border-bottom: 1px solid var(--border-color);
    background-color: rgba(255, 255, 255, 0.01);
}

.ws-tab-btn {
    padding: 16px 24px;
    background: none;
    border: none;
    color: var(--text-secondary);
    font-family: var(--font-header);
    font-weight: 500;
    font-size: 14px;
    cursor: pointer;
    border-bottom: 2px solid transparent;
    transition: var(--transition-smooth);
}

.ws-tab-btn:hover {
    color: var(--text-primary);
}

.ws-tab-btn.active {
    color: var(--color-primary);
    border-bottom-color: var(--color-primary);
}

.workspace-tab-contents {
    flex-grow: 1;
    overflow: hidden;
    display: flex;
    flex-direction: column;
}

.ws-tab-content {
    display: none;
    height: 100%;
    flex-direction: column;
    overflow: hidden;
}

.ws-tab-content.active {
    display: flex;
}

/* Live Translation UI */
.translation-grid-view {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1px;
    background-color: var(--border-color);
    flex-grow: 1;
    min-height: 250px;
    overflow: hidden;
}

.text-column {
    background-color: var(--bg-sidebar);
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.text-column h4 {
    padding: 12px 16px;
    background-color: rgba(255, 255, 255, 0.01);
    border-bottom: 1px solid var(--border-color);
    font-size: 12px;
    font-weight: 600;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.text-scroller {
    padding: 20px;
    overflow-y: auto;
    flex-grow: 1;
    font-size: 14px;
    line-height: 1.6;
    color: var(--text-primary);
}

.text-placeholder {
    color: var(--text-muted);
    font-style: italic;
    font-size: 13px;
    text-align: center;
    padding-top: 40px;
}

/* Translation Highlight Animations */
.chunk-active {
    background-color: rgba(99, 102, 241, 0.05);
    border-left: 3px solid var(--color-primary);
    padding-left: 8px;
    margin-bottom: 16px;
}

.chunk-translated {
    border-left: 3px solid var(--color-success);
    padding-left: 8px;
    margin-bottom: 16px;
    animation: pulseGlow 1.5s ease-out;
}

/* Console Box Styles */
.console-box {
    height: 140px;
    background-color: #07070a;
    border-top: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    font-family: monospace;
}

.console-header {
    padding: 8px 16px;
    background-color: rgba(255, 255, 255, 0.02);
    border-bottom: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 11px;
    color: var(--text-secondary);
}

.console-body {
    padding: 12px 16px;
    overflow-y: auto;
    flex-grow: 1;
    font-size: 11px;
    line-height: 1.5;
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.console-line {
    color: var(--text-secondary);
}

.console-line.system {
    color: var(--text-muted);
}

.console-line.working {
    color: var(--color-warning);
}

.console-line.success {
    color: var(--color-success);
}

.console-line.error {
    color: var(--color-danger);
}

/* Metadata Tab UI */
.metadata-editor-container {
    padding: 24px;
    overflow-y: auto;
    flex-grow: 1;
    display: flex;
    flex-direction: column;
}

.metadata-alert {
    display: flex;
    gap: 12px;
    padding: 14px;
    border-radius: 8px;
    margin-bottom: 20px;
    font-size: 13px;
    line-height: 1.5;
}

.metadata-alert.info {
    background-color: rgba(99, 102, 241, 0.08);
    border: 1px solid rgba(99, 102, 241, 0.2);
    color: #a5b4fc;
}

.alert-icon {
    width: 20px;
    height: 20px;
    flex-shrink: 0;
}

.form-row-2 {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
}

.font-bold {
    font-weight: 700;
}

/* KDP Book Preview Tab UI */
.kdp-settings-bar {
    padding: 10px 24px;
    background-color: rgba(255, 255, 255, 0.02);
    border-bottom: 1px solid var(--border-color);
    font-size: 12px;
    color: var(--text-secondary);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.book-preview-container {
    flex-grow: 1;
    padding: 24px;
    overflow-y: auto;
    background-color: #1a1a24;
    display: flex;
    justify-content: center;
}

.kdp-page-viewport {
    background-color: #ffffff;
    color: #111111;
    box-shadow: 0 10px 30px rgba(0,0,0,0.3);
    border-radius: 4px;
    width: 100%;
    max-width: 600px;
    min-height: 800px;
    transition: var(--transition-smooth);
}

/* KDP Formatting Simulation:
   - Margins: Top/Bottom 2.5cm, Inner 3.2cm, Outer 2cm.
*/
.kdp-page-viewport.show-margins {
    position: relative;
}

.kdp-page-viewport.show-margins::before {
    content: '';
    position: absolute;
    top: 2.5cm;
    bottom: 2.5cm;
    left: 3.2cm;
    right: 2.0cm;
    border: 1px dashed rgba(99, 102, 241, 0.25);
    pointer-events: none;
}

.kdp-page-content {
    padding-top: 2.5cm;
    padding-bottom: 2.5cm;
    padding-left: 3.2cm;
    padding-right: 2.0cm;
    font-family: var(--font-book);
    font-size: 11pt;
    line-height: 1.4;
    text-align: justify;
}

.kdp-page-content h1,
.kdp-page-content h2,
.kdp-page-content h3 {
    font-family: var(--font-header);
    color: #000;
    margin-top: 0;
    margin-bottom: 20px;
    text-align: center;
}

.kdp-page-content h1 {
    font-size: 16pt;
    font-weight: 700;
    border-bottom: none;
    margin-top: 40px;
    page-break-before: always;
}

.kdp-page-content h2 {
    font-size: 13pt;
    font-weight: 600;
}

.kdp-page-content p {
    text-indent: 1.5em;
    margin-bottom: 0;
}

.kdp-page-content p:first-of-type,
.kdp-page-content h1 + p,
.kdp-page-content h2 + p {
    text-indent: 0;
}

.preview-instruction {
    text-align: center;
    color: #666;
    margin-top: 100px;
}

/* QA Sidebar Checklist */
.qa-card {
    height: 100%;
}

.qa-checklist {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 16px;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 24px;
}

.qa-checklist li {
    display: flex;
    align-items: flex-start;
    gap: 12px;
}

.qa-checklist input[type="checkbox"] {
    width: 18px;
    height: 18px;
    accent-color: var(--color-success);
    margin-top: 2px;
    cursor: not-allowed;
}

.qa-checklist label {
    font-size: 13px;
    color: var(--text-secondary);
    line-height: 1.4;
    cursor: default;
}

.qa-checklist input[type="checkbox"]:checked + label {
    color: var(--text-primary);
    text-decoration: none;
}

.qa-status-box h4 {
    font-size: 12px;
    font-weight: 600;
    color: var(--text-secondary);
    margin-bottom: 8px;
    text-transform: uppercase;
}

.qa-notes-content {
    background-color: var(--bg-input);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 12px;
    font-size: 12px;
    line-height: 1.5;
    color: var(--text-secondary);
    max-height: 180px;
    overflow-y: auto;
}

/* Export Panel Center Card */
.center-card {
    align-self: center;
    justify-self: center;
    margin: auto;
    width: 100%;
}

.max-width-lg {
    max-width: 800px;
}

.export-header-success {
    padding: 40px;
    border-bottom: 1px solid var(--border-color);
    text-align: center;
    background: radial-gradient(circle at top, rgba(16, 185, 129, 0.08) 0%, transparent 60%);
}

.success-icon {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    background-color: rgba(16, 185, 129, 0.15);
    border: 2px solid var(--color-success);
    color: var(--color-success);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 32px;
    font-weight: bold;
    margin: 0 auto 20px;
    box-shadow: 0 0 20px rgba(16, 185, 129, 0.2);
}

.export-header-success h2 {
    font-family: var(--font-header);
    font-size: 24px;
    margin-bottom: 8px;
}

.export-header-success p {
    color: var(--text-secondary);
    font-size: 14px;
}

.export-body {
    padding: 40px;
}

.metadata-summary-box {
    background-color: rgba(255, 255, 255, 0.01);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 20px;
}

.metadata-summary-box h3 {
    font-family: var(--font-header);
    font-size: 14px;
    font-weight: 600;
    margin-bottom: 12px;
    color: var(--text-secondary);
}

.metadata-summary-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 8px;
    font-size: 13px;
}

.metadata-summary-list li {
    display: flex;
    gap: 8px;
}

.metadata-summary-list strong {
    color: var(--text-secondary);
    min-width: 80px;
}

.export-options-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
    gap: 20px;
}

.export-option-card {
    background-color: var(--bg-input);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 24px;
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    transition: var(--transition-smooth);
}

.export-option-card:hover {
    border-color: var(--color-primary);
    transform: translateY(-2px);
    box-shadow: var(--shadow-glow);
}

.option-icon {
    font-size: 32px;
    margin-bottom: 16px;
}

.export-option-card h4 {
    font-family: var(--font-header);
    font-size: 15px;
    margin-bottom: 8px;
}

.export-option-card p {
    font-size: 11px;
    color: var(--text-muted);
    line-height: 1.4;
    flex-grow: 1;
}

/* Modal Styling */
.modal-overlay {
    position: fixed;
    inset: 0;
    background-color: rgba(0, 0, 0, 0.7);
    backdrop-filter: blur(8px);
    display: none;
    align-items: center;
    justify-content: center;
    z-index: 100;
    animation: fadeIn 0.2s ease-out;
}

.modal-overlay.active {
    display: flex;
}

.modal-box {
    background-color: var(--bg-sidebar);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    width: 90%;
    max-width: 480px;
    overflow: hidden;
    box-shadow: var(--shadow-premium);
    animation: slideUp 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.modal-header {
    padding: 20px 24px;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.modal-header h3 {
    font-family: var(--font-header);
    font-size: 16px;
    font-weight: 600;
}

.modal-close {
    background: none;
    border: none;
    color: var(--text-secondary);
    font-size: 24px;
    cursor: pointer;
    line-height: 1;
}

.modal-close:hover {
    color: var(--text-primary);
}

.modal-body {
    padding: 24px;
}

.modal-footer {
    padding: 16px 24px;
    background-color: rgba(0,0,0,0.15);
    border-top: 1px solid var(--border-color);
    display: flex;
    justify-content: flex-end;
    gap: 12px;
}

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

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

@keyframes pulseGlow {
    0% { background-color: rgba(16, 185, 129, 0); }
    50% { background-color: rgba(16, 185, 129, 0.08); }
    100% { background-color: rgba(16, 185, 129, 0); }
}

/* Custom Scrollbar Styles */
::-webkit-scrollbar {
    width: 6px;
    height: 6px;
}

::-webkit-scrollbar-track {
    background: transparent;
}

::-webkit-scrollbar-thumb {
    background: rgba(255, 255, 255, 0.1);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: rgba(255, 255, 255, 0.2);
}

/* Processing Loader Overlay */
.processing-loader-overlay {
    position: fixed;
    inset: 0;
    background-color: rgba(7, 7, 10, 0.85);
    backdrop-filter: blur(12px);
    display: none;
    align-items: center;
    justify-content: center;
    z-index: 9999;
    animation: fadeIn 0.3s ease-out;
}

.processing-loader-overlay.active {
    display: flex;
}

.loader-content {
    background-color: var(--bg-sidebar);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 40px;
    text-align: center;
    max-width: 420px;
    width: 90%;
    box-shadow: var(--shadow-premium);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 20px;
}

.spinner {
    width: 50px;
    height: 50px;
    border: 4px solid rgba(99, 102, 241, 0.1);
    border-top: 4px solid var(--color-primary);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

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

/* LANDING PAGE STYLES */
.landing-page {
    background-color: var(--bg-main);
    color: var(--text-main);
    font-family: 'Outfit', sans-serif;
    min-height: 100vh;
    overflow-y: auto;
    scroll-behavior: smooth;
    position: relative;
    z-index: 10;
}

.landing-nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 8%;
    border-bottom: 1px solid var(--border-color);
    backdrop-filter: blur(10px);
    background-color: rgba(10, 10, 15, 0.7);
    position: sticky;
    top: 0;
    z-index: 100;
}

.landing-nav .nav-links {
    display: flex;
    align-items: center;
    gap: 30px;
}

.landing-nav .nav-links a {
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 500;
    transition: color 0.3s;
}

.landing-nav .nav-links a:hover {
    color: var(--color-primary);
}

.hero-section {
    padding: 100px 8% 80px 8%;
    text-align: center;
    display: flex;
    flex-direction: column;
    align-items: center;
    position: relative;
    overflow: hidden;
}

.hero-glow-1 {
    position: absolute;
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(99, 102, 241, 0.15) 0%, rgba(99, 102, 241, 0) 70%);
    top: -200px;
    left: 10%;
    z-index: -1;
    filter: blur(50px);
}

.hero-glow-2 {
    position: absolute;
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(139, 92, 246, 0.15) 0%, rgba(139, 92, 246, 0) 70%);
    bottom: -200px;
    right: 10%;
    z-index: -1;
    filter: blur(50px);
}

.hero-content {
    max-width: 800px;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.hero-content .badge {
    background-color: rgba(99, 102, 241, 0.15);
    color: #818cf8;
    border: 1px solid rgba(99, 102, 241, 0.3);
    padding: 6px 16px;
    border-radius: 100px;
    font-size: 0.85rem;
    font-weight: 600;
    letter-spacing: 0.05em;
    margin-bottom: 24px;
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 800;
    line-height: 1.2;
    margin-bottom: 24px;
    letter-spacing: -0.02em;
}

.gradient-text {
    background: linear-gradient(135deg, #6366f1 0%, #a855f7 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--text-secondary);
    line-height: 1.6;
    margin-bottom: 40px;
}

.hero-actions {
    display: flex;
    gap: 16px;
}

.features-section {
    padding: 80px 8%;
    border-top: 1px solid var(--border-color);
}

.section-title {
    text-align: center;
    font-size: 2.25rem;
    font-weight: 700;
    margin-bottom: 50px;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 30px;
}

.feature-card {
    background-color: var(--bg-sidebar);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 35px;
    transition: transform 0.3s, border-color 0.3s, box-shadow 0.3s;
}

.feature-card:hover {
    transform: translateY(-5px);
    border-color: rgba(99, 102, 241, 0.4);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
}

.feature-icon {
    font-size: 2.5rem;
    margin-bottom: 20px;
}

.feature-card h3 {
    font-size: 1.35rem;
    margin-bottom: 12px;
}

.feature-card p {
    color: var(--text-secondary);
    line-height: 1.5;
}

@media (max-width: 768px) {
    .hero-title {
        font-size: 2.5rem;
    }
    .landing-nav {
        padding: 15px 4%;
    }
    .landing-nav .nav-links a {
        display: none;
    }
    .hero-actions {
        flex-direction: column;
        width: 100%;
    }
    .hero-actions button, .hero-actions a {
        width: 100%;
        text-align: center;
    }
}

/* Cost Estimator Box Styles */
.cost-estimator-box {
    background: rgba(99, 102, 241, 0.05);
    border: 1px solid rgba(99, 102, 241, 0.2);
    border-radius: 12px;
    padding: 16px;
    margin-top: 16px;
}
.cost-estimator-box h4 {
    color: var(--text-primary);
    font-size: 14px;
    margin-bottom: 8px;
    font-weight: 600;
}
.cost-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 12px;
}
.cost-item {
    font-size: 12px;
    color: var(--text-secondary);
}
.cost-item strong {
    color: var(--text-primary);
}

/* Modal styles for Session Recovery */
.modal-overlay {
    position: fixed;
    inset: 0;
    background-color: rgba(0, 0, 0, 0.85);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9999;
    backdrop-filter: blur(8px);
}
.modal-box {
    background-color: var(--bg-sidebar);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    width: 90%;
    max-width: 480px;
    padding: 24px;
    box-shadow: var(--shadow-premium);
}
.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 16px;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 12px;
}
.modal-header h3 {
    font-size: 18px;
    font-weight: 700;
    color: var(--text-primary);
}
.modal-close {
    background: none;
    border: none;
    color: var(--text-muted);
    font-size: 24px;
    cursor: pointer;
}
.modal-close:hover {
    color: var(--color-danger);
}
.modal-body {
    color: var(--text-secondary);
    font-size: 14px;
    line-height: 1.5;
    margin-bottom: 24px;
}
.modal-footer {
    display: flex;
    justify-content: flex-end;
    gap: 12px;
}

/* Turbo Mode Switch & Concurrency styling */
.turbo-mode-group {
    background-color: rgba(255, 255, 255, 0.02);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 16px;
    margin-bottom: 20px;
}
.switch-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
}
.switch-container label {
    font-weight: 600;
    font-size: 13px;
    color: var(--text-secondary);
}
.switch {
    position: relative;
    display: inline-block;
    width: 44px;
    height: 24px;
}
.switch input {
    opacity: 0;
    width: 0;
    height: 0;
}
.slider {
    position: absolute;
    cursor: pointer;
    inset: 0;
    background-color: var(--bg-input);
    border: 1px solid var(--border-color);
    transition: .4s;
    border-radius: 24px;
}
.slider:before {
    position: absolute;
    content: "";
    height: 16px;
    width: 16px;
    left: 3px;
    bottom: 3px;
    background-color: var(--text-secondary);
    transition: .4s;
    border-radius: 50%;
}
input:checked + .slider {
    background-color: var(--color-primary);
}
input:checked + .slider:before {
    transform: translateX(20px);
    background-color: white;
}

/* Analytics Tab Container */
.analytics-container {
    display: flex;
    flex-direction: column;
    gap: 20px;
    padding: 10px;
}
.analytics-summary-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 15px;
}
.analytics-card {
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 20px;
    text-align: center;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.2);
}
.analytics-card-label {
    font-size: 0.8rem;
    color: var(--text-secondary);
    margin-bottom: 8px;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}
.analytics-card-value {
    font-size: 1.8rem;
    font-family: 'Outfit', sans-serif;
    font-weight: 700;
    color: var(--color-primary);
}
.analytics-charts-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(450px, 1fr));
    gap: 20px;
}
.chart-wrapper {
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 20px;
}
.chart-wrapper h4 {
    margin-top: 0;
    margin-bottom: 15px;
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--text-primary);
}
.chart-canvas-container {
    position: relative;
    width: 100%;
    height: 250px;
}

/* Contenteditable Inline Editor styling */
.kdp-chapter-block [contenteditable="true"] {
    position: relative;
    transition: all 0.2s ease;
    border-radius: 4px;
    padding: 2px 6px;
    outline: none;
}
.kdp-chapter-block [contenteditable="true"]:hover {
    background: rgba(245, 158, 11, 0.08);
    box-shadow: 0 0 0 1px rgba(245, 158, 11, 0.3);
    cursor: text;
}
.kdp-chapter-block [contenteditable="true"]:focus {
    background: rgba(245, 158, 11, 0.12);
    box-shadow: 0 0 0 2px rgba(245, 158, 11, 0.6);
}

/* Grammar Warning Cards */
.grammar-warning-card {
    background: rgba(239, 68, 68, 0.08);
    border-left: 3px solid var(--color-error);
    border-radius: 6px;
    padding: 8px 12px;
    margin-bottom: 10px;
    font-size: 0.8rem;
    line-height: 1.4;
}
.grammar-warning-card .warning-header {
    display: flex;
    justify-content: space-between;
    font-weight: 600;
    color: #fca5a5;
    margin-bottom: 4px;
}
.grammar-warning-card .warning-text {
    color: var(--text-secondary);
}
.grammar-warning-card .warning-suggestion {
    margin-top: 5px;
    font-weight: 500;
    color: #86efac;
}
.grammar-warning-card .btn-fix-warning {
    background: none;
    border: none;
    color: var(--color-primary);
    text-decoration: underline;
    font-size: 0.75rem;
    cursor: pointer;
    padding: 0;
    margin-top: 4px;
    display: block;
}