/* ============================================================================
   Tesseract OCR WebApp - Styles
   Dark theme with purple accents, inspired by modern web applications
   ============================================================================ */

/* CSS Variables */
:root {
    /* Colors */
    --bg-primary: #2b2b4c;
    --bg-secondary: #1a1a24;
    --bg-tertiary: #252532;
    --bg-card: #1e1e2a;
    --bg-hover: #2a2a3a;
    
    --accent-primary: #a855f7;
    --accent-secondary: #c084fc;
    --accent-tertiary: #e879f9;
    --accent-glow: rgba(168, 85, 247, 0.3);
    
    --text-primary: #f0f0f5;
    --text-secondary: #a0a0b0;
    --text-muted: #6b6b7b;
    
    --border-color: #2d2d3d;
    --border-focus: var(--accent-primary);
    
    --success: #22c55e;
    --warning: #f59e0b;
    --error: #ef4444;
    --info: #3b82f6;
    
    /* Spacing */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    
    /* Border Radius */
    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 15px;
    --radius-xl: 20px;
    
    /* Shadows */
    --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.5);
    --shadow-glow: 0 0 20px var(--accent-glow);
    
    /* Transitions */
    --transition-fast: 0.15s ease;
    --transition-normal: 0.25s ease;
    --transition-slow: 0.4s ease;
}

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

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
}

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

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

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

::-webkit-scrollbar-thumb:hover {
    background: var(--accent-secondary);
}

/* App Container */
.app-container {
    display: flex;
    flex-direction: column;
    min-height: 100vh;
    max-width: 1400px;
    margin: 0 auto;
    padding: var(--spacing-md);
}

/* Header */
.app-header {
    background: linear-gradient(135deg, var(--accent-primary) 0%, #7c3aed 50%, #4f46e5 100%);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    margin-bottom: var(--spacing-md);
    box-shadow: var(--shadow-lg), var(--shadow-glow);
    text-align: center;
}

.app-header h1 {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: var(--spacing-xs);
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.3);
}

.app-header p {
    font-size: 1rem;
    opacity: 0.9;
}

/* Tab Navigation */
.tab-nav {
    display: flex;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-md);
    background: var(--bg-secondary);
    padding: var(--spacing-sm);
    border-radius: var(--radius-md);
}

.tab-btn {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-md);
    background: transparent;
    border: none;
    border-radius: var(--radius-sm);
    color: var(--text-secondary);
    font-size: 0.95rem;
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition-normal);
}

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

.tab-btn.active {
    background: var(--accent-primary);
    color: white;
    box-shadow: var(--shadow-sm);
}

.tab-icon {
    font-size: 1.2rem;
}

/* Main Content */
.main-content {
    flex: 1;
}

.tab-content {
    display: none;
}

.tab-content.active {
    display: block;
    animation: fadeIn 0.3s ease;
}

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

/* Cards */
.card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    margin-bottom: var(--spacing-md);
    box-shadow: var(--shadow-md);
}

.card h2 {
    font-size: 1.25rem;
    margin-bottom: var(--spacing-md);
    padding-bottom: var(--spacing-sm);
    border-bottom: 1px solid var(--border-color);
}

.card h3 {
    font-size: 1.1rem;
    margin: var(--spacing-md) 0 var(--spacing-sm);
    color: var(--text-secondary);
}

.section-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-md);
    padding-bottom: var(--spacing-sm);
    border-bottom: 1px solid var(--border-color);
}

.section-header h2 {
    margin: 0;
    padding: 0;
    border: none;
}

/* OCR Layout */
.ocr-layout {
    display: grid;
    grid-template-columns: minmax(300px, 1fr) minmax(400px, 2fr);
    gap: var(--spacing-md);
}

@media (max-width: 1024px) {
    .ocr-layout {
        grid-template-columns: 1fr;
    }
}

/* Upload Zone */
.upload-zone {
    border: 2px dashed var(--border-color);
    border-radius: var(--radius-md);
    padding: var(--spacing-xl);
    text-align: center;
    cursor: pointer;
    transition: all var(--transition-normal);
}

.upload-zone:hover,
.upload-zone.dragover {
    border-color: var(--accent-primary);
    background: rgba(168, 85, 247, 0.1);
}

.upload-zone.dragover {
    transform: scale(1.02);
    box-shadow: var(--shadow-glow);
}

.upload-icon {
    font-size: 3rem;
    margin-bottom: var(--spacing-sm);
}

.upload-text {
    font-size: 1.1rem;
    font-weight: 500;
    margin-bottom: var(--spacing-xs);
}

.upload-hint {
    font-size: 0.85rem;
    color: var(--text-muted);
}

/* Upload Queue */
.upload-queue {
    margin-top: var(--spacing-md);
}

.upload-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-md);
    background: var(--bg-tertiary);
    border-radius: var(--radius-sm);
    margin-bottom: var(--spacing-xs);
}

.upload-item .file-icon {
    font-size: 1.2rem;
}

.upload-item .file-name {
    flex: 1;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.upload-item .file-size {
    color: var(--text-muted);
    font-size: 0.85rem;
}

.upload-item .file-status {
    font-size: 1rem;
}

.upload-item .file-status.success { color: var(--success); }
.upload-item .file-status.error { color: var(--error); }
.upload-item .file-status.loading { animation: spin 1s linear infinite; }

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

.upload-item .btn-remove {
    background: none;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    padding: var(--spacing-xs);
    font-size: 1rem;
    transition: color var(--transition-fast);
}

.upload-item .btn-remove:hover {
    color: var(--error);
}

/* OCR Options */
.ocr-options {
    margin-top: var(--spacing-lg);
    padding-top: var(--spacing-md);
    border-top: 1px solid var(--border-color);
}

/* Forms */
.form-group {
    margin-bottom: var(--spacing-md);
}

.form-group label {
    display: block;
    font-size: 0.9rem;
    font-weight: 500;
    margin-bottom: var(--spacing-xs);
    color: var(--text-secondary);
}

.form-hint {
    font-size: 0.8rem;
    color: var(--text-muted);
    margin-top: var(--spacing-xs);
}

.form-row {
    display: flex;
    gap: var(--spacing-md);
    align-items: flex-end;
}

.form-row .form-group {
    margin-bottom: 0;
}

input[type="text"],
input[type="number"],
input[type="password"],
select,
textarea {
    width: 100%;
    padding: var(--spacing-sm) var(--spacing-md);
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    font-size: 0.95rem;
    transition: all var(--transition-fast);
}

input:focus,
select:focus,
textarea:focus {
    outline: none;
    border-color: var(--accent-primary);
    box-shadow: 0 0 0 3px var(--accent-glow);
}

select {
    cursor: pointer;
}

select[multiple] {
    min-height: 100px;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-lg);
    border: none;
    border-radius: var(--radius-sm);
    font-size: 0.95rem;
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition-normal);
}

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

.btn-primary {
    background: var(--accent-primary);
    color: white;
}

.btn-primary:hover:not(:disabled) {
    background: var(--accent-secondary);
    transform: translateY(-1px);
    box-shadow: var(--shadow-sm);
}

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

.btn-secondary:hover:not(:disabled) {
    background: var(--bg-hover);
    border-color: var(--accent-primary);
}

.btn-danger {
    background: var(--error);
    color: white;
}

.btn-danger:hover:not(:disabled) {
    background: #dc2626;
}

.btn-sm {
    padding: var(--spacing-xs) var(--spacing-sm);
    font-size: 0.85rem;
}

.btn-link {
    background: none;
    border: none;
    color: var(--accent-primary);
    cursor: pointer;
    padding: 0;
    font-size: inherit;
    text-decoration: underline;
    transition: opacity 0.2s;
}

.btn-link:hover {
    opacity: 0.8;
}

.btn-icon {
    font-size: 1.1em;
}

/* Results Container */
.results-container {
    min-height: 200px;
    max-height: 400px;
    overflow-y: auto;
    background: var(--bg-tertiary);
    border-radius: var(--radius-sm);
    padding: var(--spacing-md);
}

.results-placeholder {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    height: 150px;
    color: var(--text-muted);
}

.placeholder-icon {
    font-size: 3rem;
    margin-bottom: var(--spacing-sm);
    opacity: 0.5;
}

.ocr-text {
    white-space: pre-wrap;
    font-family: 'Consolas', 'Monaco', monospace;
    font-size: 0.9rem;
    line-height: 1.5;
    margin: 0;
    padding: 0;
    outline: none;
    border: 2px solid transparent;
    transition: border-color 0.2s, background-color 0.2s;
}

.ocr-text:focus {
    border-color: var(--accent-primary);
    background-color: var(--bg-primary);
}

/* Translation Section */
.translation-section {
    margin-top: var(--spacing-lg);
    padding-top: var(--spacing-md);
    border-top: 1px solid var(--border-color);
}

/* Translation Queue */
.translation-queue {
    margin-bottom: var(--spacing-lg);
    padding: var(--spacing-md);
    background: var(--bg-tertiary);
    border-radius: var(--radius-md);
    border: 1px solid var(--border-color);
}

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

.queue-header h4 {
    margin: 0;
    font-size: 1rem;
    color: var(--text-primary);
}

.queue-list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.queue-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-md);
    background: var(--bg-secondary);
    border-radius: var(--radius-sm);
    border-left: 3px solid var(--border-color);
    transition: all 0.2s ease;
}

.queue-item.queue-pending {
    border-left-color: var(--info);
}

.queue-item.queue-processing {
    border-left-color: var(--accent-primary);
    animation: pulse 1.5s ease-in-out infinite;
}

.queue-item.queue-completed {
    border-left-color: var(--success);
    opacity: 0.7;
}

.queue-item.queue-failed {
    border-left-color: var(--error);
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.6; }
}

.queue-icon {
    font-size: 1.5rem;
    flex-shrink: 0;
}

.queue-info {
    flex: 1;
    min-width: 0;
}

.queue-title {
    font-weight: 500;
    color: var(--text-primary);
    margin-bottom: 0.25rem;
}

.queue-meta {
    font-size: 0.85rem;
    color: var(--text-muted);
}

.queue-error {
    font-size: 0.85rem;
    color: var(--error);
    margin-top: 0.25rem;
}

.translation-warnings {
    margin-top: var(--spacing-md);
    padding: var(--spacing-md);
    background: rgba(245, 158, 11, 0.1);
    border-left: 3px solid var(--warning);
    border-radius: var(--radius-sm);
}

.translation-warnings strong {
    color: var(--warning);
}

.translation-warnings ul {
    margin: var(--spacing-xs) 0 0 var(--spacing-lg);
    padding: 0;
}

.translation-warnings li {
    color: var(--text-secondary);
    margin-bottom: var(--spacing-xs);
}

.translation-controls {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-md);
    align-items: end;
}

.translation-result {
    margin-top: var(--spacing-md);
    padding: var(--spacing-md);
    background: var(--bg-tertiary);
    border-radius: var(--radius-sm);
    white-space: pre-wrap;
    display: none;
}

.translation-result.visible {
    display: block;
}

/* Key Source Toggle */
.key-source-toggle {
    display: flex;
    gap: var(--spacing-md);
}

.radio-label {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    cursor: pointer;
}

.radio-label input[type="radio"] {
    width: auto;
    accent-color: var(--accent-primary);
}

.key-indicator {
    font-size: 0.8rem;
    color: var(--text-muted);
    margin-top: var(--spacing-xs);
}

.key-indicator.has-key {
    color: var(--success);
}

/* Translation Layout */
.translation-layout {
    display: grid;
    grid-template-columns: minmax(300px, 1fr) minmax(400px, 2fr);
    gap: var(--spacing-lg);
    margin-top: var(--spacing-lg);
}

.translation-controls {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.input-with-button {
    display: flex;
    gap: var(--spacing-sm);
    align-items: center;
}

.input-with-button select {
    flex: 1;
}

.btn-block {
    width: 100%;
}

@media (max-width: 768px) {
    .translation-layout {
        grid-template-columns: 1fr;
    }
}

/* Download Section */
.download-section {
    margin-top: var(--spacing-lg);
    padding-top: var(--spacing-md);
    border-top: 1px solid var(--border-color);
}


.download-buttons {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
}

/* File Manager */
.file-manager-layout {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-md);
}

@media (max-width: 900px) {
    .file-manager-layout {
        grid-template-columns: 1fr;
    }
}

.file-list {
    max-height: 500px;
    overflow-y: auto;
}

.file-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-md);
    background: var(--bg-tertiary);
    border-radius: var(--radius-sm);
    margin-bottom: var(--spacing-xs);
    transition: background var(--transition-fast);
}

.file-item:hover {
    background: var(--bg-hover);
}

.file-item .file-icon {
    font-size: 1.5rem;
}

.file-item .file-info {
    flex: 1;
    min-width: 0;
}

.file-item .file-name {
    font-weight: 500;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.file-item .file-meta {
    font-size: 0.8rem;
    color: var(--text-muted);
}

.file-item .file-actions {
    display: flex;
    gap: var(--spacing-xs);
}

.file-item .file-actions .btn {
    padding: var(--spacing-xs);
    font-size: 1rem;
}

.empty-state {
    text-align: center;
    padding: var(--spacing-xl);
    color: var(--text-muted);
}

/* Settings Layout */
.settings-layout {
    max-width: 800px;
}

.settings-group {
    padding-bottom: var(--spacing-md);
    border-bottom: 1px solid var(--border-color);
}

.settings-group:last-child {
    border-bottom: none;
}

/* Collapsible Settings Cards */
.card.collapsible {
    position: relative;
}

.card.collapsible .collapsible-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    cursor: pointer;
    user-select: none;
    margin-bottom: var(--spacing-md);
    padding: var(--spacing-sm);
    border-radius: var(--radius-sm);
    transition: background-color var(--transition-fast);
}

.card.collapsible .collapsible-header:hover {
    background-color: var(--bg-hover);
}

.card.collapsible .collapse-toggle {
    background: none;
    border: none;
    color: var(--accent-primary);
    font-size: 0.9rem;
    cursor: pointer;
    padding: 0.25rem 0.5rem;
    transition: transform var(--transition-normal), color var(--transition-fast);
    line-height: 1;
}

.card.collapsible .collapse-toggle:hover {
    color: var(--accent-secondary);
}

.card.collapsible.collapsed .collapse-toggle {
    transform: rotate(-90deg);
}

.card.collapsible .collapsible-content {
    overflow: hidden;
    transition: max-height var(--transition-normal) ease-out, opacity var(--transition-normal) ease-out;
    max-height: 5000px;
    opacity: 1;
}

.card.collapsible.collapsed .collapsible-content {
    max-height: 0;
    opacity: 0;
}

.settings-hint {
    font-size: 0.85rem;
    color: var(--text-muted);
    margin-bottom: var(--spacing-md);
}

.server-config {
    border-radius: var(--radius-sm);
}

.server-config h4 {
    margin-bottom: var(--spacing-sm);
    color: var(--accent-secondary);
}

.connection-status {
    font-size: 0.85rem;
    margin-top: var(--spacing-sm);
}

.connection-status.success {
    color: var(--success);
}

.connection-status.warning {
    color: #f59e0b;
}

.connection-status.error {
    color: var(--error);
}

/* API Keys List */
.api-keys-list {
    display: grid;
}

.api-key-item {
    display: grid;
    grid-template-columns: 150px 1fr auto;
    gap: var(--spacing-md);
    align-items: center;
    padding: var(--spacing-xs) var(--spacing-xs);
    border-radius: var(--radius-sm);
}

.api-key-item .provider-name {
    font-weight: 500;
}

.api-key-item .server-key-indicator {
    font-size: 0.8rem;
    color: var(--success);
}

.api-key-item input {
    margin: 0;
}

.api-keys-actions {
    display: flex;
    gap: var(--spacing-sm);
    margin-top: var(--spacing-md);
}

/* Language Tags */
.language-tags {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-xs);
}

.language-tag {
    display: inline-block;
    padding: var(--spacing-xs) var(--spacing-sm);
    background: var(--bg-tertiary);
    border-radius: var(--radius-sm);
    font-size: 0.85rem;
}

.language-tag.priority {
    background: var(--accent-primary);
    color: white;
}

/* About */
.about-content {
    line-height: 1.8;
}

.about-content ul {
    margin-top: var(--spacing-sm);
    padding-left: var(--spacing-lg);
}

.about-content li {
    margin-bottom: var(--spacing-xs);
}

/* Footer */
.app-footer {
    text-align: center;
    padding: var(--spacing-md);
    color: var(--text-muted);
    font-size: 0.85rem;
}

/* Modal */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 1000;
}

.modal.active {
    display: flex;
    align-items: center;
    justify-content: center;
    animation: fadeIn 0.2s ease;
}

.modal-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.7);
}

.modal-content {
    position: relative;
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    width: 90%;
    max-width: 800px;
    max-height: 80vh;
    display: flex;
    flex-direction: column;
    box-shadow: var(--shadow-lg);
}

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

.modal-header h3 {
    margin: 0;
}

.modal-close {
    background: none;
    border: none;
    color: var(--text-muted);
    font-size: 1.5rem;
    cursor: pointer;
    padding: 0;
    line-height: 1;
}

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

.modal-body {
    flex: 1;
    overflow-y: auto;
    padding: var(--spacing-lg);
}

.modal-footer {
    padding: var(--spacing-md) var(--spacing-lg);
    border-top: 1px solid var(--border-color);
    display: flex;
    justify-content: flex-end;
    gap: var(--spacing-sm);
}

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

.toast {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-md) var(--spacing-lg);
    background: var(--bg-card);
    border-radius: var(--radius-sm);
    box-shadow: var(--shadow-lg);
    animation: slideIn 0.3s ease;
    max-width: 400px;
}

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

.toast.success {
    border-left: 4px solid var(--success);
}

.toast.error {
    border-left: 4px solid var(--error);
}

.toast.warning {
    border-left: 4px solid var(--warning);
}

.toast.info {
    border-left: 4px solid var(--info);
}

.toast-icon {
    font-size: 1.2rem;
}

.toast-message {
    flex: 1;
}

.toast-close {
    background: none;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    padding: 0;
    font-size: 1.2rem;
}

/* Loading States */
.loading {
    color: var(--text-muted);
    font-style: italic;
}

.spinner {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 2px solid var(--border-color);
    border-top-color: var(--accent-primary);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

/* Responsive */
@media (max-width: 768px) {
    .app-container {
        padding: var(--spacing-sm);
    }
    
    .app-header {
        padding: var(--spacing-lg);
    }
    
    .app-header h1 {
        font-size: 1.5rem;
    }
    
    .tab-btn {
        flex-direction: column;
        gap: var(--spacing-xs);
        padding: var(--spacing-sm);
    }
    
    .tab-text {
        font-size: 0.8rem;
    }
    
    .form-row {
        flex-direction: column;
    }
    
    .api-key-item {
        grid-template-columns: 1fr;
    }
    
    .translation-controls {
        grid-template-columns: 1fr;
    }
}