/* ===== CSS Variables & Design System ===== */
:root {
    /* Colors */
    --color-primary: #6366F1;
    --color-primary-hover: #4F46E5;
    --color-primary-light: rgba(99, 102, 241, 0.1);

    --color-secondary: #64748B;
    --color-secondary-hover: #475569;

    --color-success: #10B981;
    --color-success-hover: #059669;
    --color-success-light: rgba(16, 185, 129, 0.1);

    --color-danger: #EF4444;
    --color-danger-hover: #DC2626;
    --color-danger-light: rgba(239, 68, 68, 0.1);

    --color-warning: #F59E0B;
    --color-warning-light: rgba(245, 158, 11, 0.1);

    /* Background Colors */
    --bg-primary: #0F172A;
    --bg-secondary: #1E293B;
    --bg-tertiary: #334155;
    --bg-card: #1E293B;
    --bg-input: #0F172A;

    /* Text Colors */
    --text-primary: #F8FAFC;
    --text-secondary: #94A3B8;
    --text-muted: #64748B;

    /* Border Colors */
    --border-color: #334155;
    --border-light: rgba(255, 255, 255, 0.1);

    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.3), 0 2px 4px -1px rgba(0, 0, 0, 0.2);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.4), 0 4px 6px -2px rgba(0, 0, 0, 0.2);
    --shadow-glow: 0 0 20px rgba(99, 102, 241, 0.3);

    /* Spacing */
    --spacing-xs: 4px;
    --spacing-sm: 8px;
    --spacing-md: 16px;
    --spacing-lg: 24px;
    --spacing-xl: 32px;

    /* Border Radius */
    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 16px;
    --radius-full: 9999px;

    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-base: 250ms ease;
    --transition-slow: 350ms ease;
}

/* ===== Global Styles ===== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

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

/* ===== App Container ===== */
.app-container {
    display: flex;
    flex-direction: column;
    height: 100vh;
}

/* ===== Header ===== */
.app-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--spacing-md) var(--spacing-lg);
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border-color);
    backdrop-filter: blur(10px);
}

.header-left {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.logo {
    display: flex;
    align-items: center;
}

.app-title {
    font-size: 1.25rem;
    font-weight: 600;
    background: linear-gradient(135deg, #F8FAFC, #94A3B8);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.header-right {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

/* ===== Buttons ===== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-md);
    font-size: 0.875rem;
    font-weight: 500;
    border: none;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-fast);
    white-space: nowrap;
}

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

.btn-primary {
    background: linear-gradient(135deg, var(--color-primary), #8B5CF6);
    color: white;
    box-shadow: var(--shadow-md);
}

.btn-primary:hover:not(:disabled) {
    background: linear-gradient(135deg, var(--color-primary-hover), #7C3AED);
    transform: translateY(-1px);
    box-shadow: var(--shadow-glow);
}

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

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

.btn-success {
    background: linear-gradient(135deg, var(--color-success), #059669);
    color: white;
}

.btn-success:hover:not(:disabled) {
    background: linear-gradient(135deg, var(--color-success-hover), #047857);
    transform: translateY(-1px);
}

.btn-danger {
    background: linear-gradient(135deg, var(--color-danger), #DC2626);
    color: white;
}

.btn-danger:hover:not(:disabled) {
    background: linear-gradient(135deg, var(--color-danger-hover), #B91C1C);
}

.btn-warning {
    background: linear-gradient(135deg, var(--color-warning), #D97706);
    color: white;
}

.btn-warning:hover:not(:disabled) {
    background: linear-gradient(135deg, #D97706, #B45309);
    transform: translateY(-1px);
}

.btn-icon {
    padding: var(--spacing-sm);
    background: transparent;
    color: var(--text-secondary);
}

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

/* Language select */
.lang-select {
    padding: var(--spacing-xs) var(--spacing-sm);
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    color: var(--text-primary);
    font-size: 0.85rem;
    cursor: pointer;
    outline: none;
    transition: all var(--transition-fast);
}

.lang-select:hover {
    border-color: var(--color-primary);
}

.lang-select:focus {
    border-color: var(--color-primary);
    box-shadow: 0 0 0 2px rgba(139, 92, 246, 0.2);
}

/* Result action button */
.btn-result-action {
    width: 28px;
    height: 28px;
    display: flex;
    align-items: center;
    justify-content: center;
    border: none;
    border-radius: var(--radius-sm);
    background: transparent;
    color: var(--text-muted);
    cursor: pointer;
    font-size: 14px;
    transition: all var(--transition-fast);
}

.btn-result-action:hover {
    background: var(--color-primary-light);
    color: var(--color-primary);
}

.col-actions {
    width: 60px;
    text-align: center;
}

.btn-regenerate {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    background: var(--color-primary-light);
    color: var(--color-primary);
    border: 1.5px solid var(--color-primary);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.btn-regenerate:hover {
    background: var(--color-primary);
    color: white;
    box-shadow: var(--shadow-glow);
    transform: rotate(30deg);
}

.btn-regenerate svg {
    display: block;
}

.btn-large {
    padding: var(--spacing-md) var(--spacing-lg);
    font-size: 1rem;
}

/* ===== Main Content ===== */
.main-content {
    display: grid;
    grid-template-columns: 300px 1fr 400px;
    gap: var(--spacing-md);
    padding: var(--spacing-md);
    height: calc(100vh - 73px);
    overflow: hidden;
}

/* ===== Panels ===== */
.panel {
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

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

.panel-header h2 {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-primary);
}

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

/* ===== Drop Zone ===== */
.drop-zone {
    margin: var(--spacing-md);
    padding: var(--spacing-xl);
    border: 2px dashed var(--border-color);
    border-radius: var(--radius-lg);
    text-align: center;
    transition: all var(--transition-base);
    cursor: pointer;
}

.drop-zone:hover,
.drop-zone.dragover {
    border-color: var(--color-primary);
    background: var(--color-primary-light);
}

.drop-zone.dragover {
    transform: scale(1.02);
}

.drop-zone-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-md);
}

.drop-zone-content svg {
    color: var(--text-muted);
}

.drop-zone-text {
    font-size: 0.95rem;
    color: var(--text-secondary);
}

.drop-zone-hint {
    font-size: 0.8rem;
    color: var(--text-muted);
}

/* ===== File List ===== */
.file-list {
    flex: 1;
    overflow-y: auto;
    padding: 0 var(--spacing-md);
}

.file-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm);
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: all var(--transition-fast);
    margin-bottom: var(--spacing-xs);
}

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

.file-item.active {
    background: var(--color-primary-light);
    border: 1px solid var(--color-primary);
}

.file-item.processed {
    border-left: 3px solid var(--color-success);
}

.file-item.error {
    border-left: 3px solid var(--color-danger);
}

.file-item.processing {
    border-left: 3px solid var(--color-warning);
    animation: pulse 1.5s infinite;
}

@keyframes pulse {

    0%,
    100% {
        opacity: 1;
    }

    50% {
        opacity: 0.6;
    }
}

.file-thumb {
    width: 40px;
    height: 40px;
    border-radius: var(--radius-sm);
    object-fit: cover;
    background: var(--bg-tertiary);
}

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

.file-name {
    font-size: 0.85rem;
    color: var(--text-primary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.file-size {
    font-size: 0.75rem;
    color: var(--text-muted);
}

.file-status-icon {
    width: 20px;
    height: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

/* 文件项主内容区域 */
.file-item-main {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    flex: 1;
    min-width: 0;
    cursor: pointer;
}

/* 文件操作按钮 */
.file-actions {
    display: flex;
    gap: 2px;
    opacity: 0;
    transition: opacity var(--transition-fast);
}

.file-item:hover .file-actions {
    opacity: 1;
}

.btn-file-action {
    width: 22px;
    height: 22px;
    display: flex;
    align-items: center;
    justify-content: center;
    border: none;
    border-radius: var(--radius-sm);
    cursor: pointer;
    font-size: 12px;
    transition: all var(--transition-fast);
    background: transparent;
    color: var(--text-muted);
}

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

.btn-file-action.btn-delete:hover {
    background: var(--color-danger-light);
    color: var(--color-danger);
}

.btn-file-action.btn-retry:hover {
    background: var(--color-warning-light);
    color: var(--color-warning);
}

/* ===== File Stats ===== */
.file-stats {
    display: flex;
    justify-content: space-around;
    padding: var(--spacing-md);
    border-top: 1px solid var(--border-color);
    background: var(--bg-primary);
}

.stat-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    font-size: 0.8rem;
    color: var(--text-secondary);
}

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

/* ===== Preview Area ===== */
.panel-preview {
    display: flex;
    flex-direction: column;
}

.preview-area {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-lg);
    background: var(--bg-primary);
    margin: var(--spacing-md);
    border-radius: var(--radius-lg);
    overflow: hidden;
    min-height: 200px;
}

.preview-placeholder {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-md);
    color: var(--text-muted);
}

.preview-image,
.preview-video {
    max-width: 100%;
    max-height: 100%;
    border-radius: var(--radius-md);
    object-fit: contain;
}

.hidden {
    display: none !important;
}

/* ===== Current File Info ===== */
.current-file-info {
    padding: 0 var(--spacing-lg);
    margin-bottom: var(--spacing-md);
}

.current-file-info h3 {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: var(--spacing-xs);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.file-meta {
    display: flex;
    gap: var(--spacing-md);
    font-size: 0.85rem;
    color: var(--text-muted);
}

/* ===== Progress Section ===== */
.progress-section {
    padding: var(--spacing-md) var(--spacing-lg);
    background: var(--bg-primary);
    margin: 0 var(--spacing-md);
    border-radius: var(--radius-md);
}

.progress-header {
    display: flex;
    justify-content: space-between;
    margin-bottom: var(--spacing-sm);
}

.progress-label {
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.progress-value {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--color-primary);
}

.progress-bar {
    height: 8px;
    background: var(--bg-tertiary);
    border-radius: var(--radius-full);
    overflow: hidden;
}

.progress-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--color-primary), #8B5CF6);
    border-radius: var(--radius-full);
    transition: width var(--transition-base);
}

.progress-status {
    margin-top: var(--spacing-sm);
    font-size: 0.8rem;
    color: var(--text-muted);
    text-align: center;
}

/* ===== Action Buttons ===== */
.action-buttons {
    display: flex;
    gap: var(--spacing-md);
    padding: var(--spacing-lg);
    justify-content: center;
}

/* ===== Results Panel ===== */
.results-container {
    flex: 1;
    overflow: auto;
}

.results-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.85rem;
}

.results-table th {
    position: sticky;
    top: 0;
    background: var(--bg-secondary);
    padding: var(--spacing-md);
    text-align: left;
    font-weight: 600;
    color: var(--text-secondary);
    border-bottom: 1px solid var(--border-color);
    z-index: 1;
}

.results-table td {
    padding: var(--spacing-sm) var(--spacing-md);
    border-bottom: 1px solid var(--border-light);
    vertical-align: top;
}

.results-table tbody tr {
    cursor: pointer;
    transition: background var(--transition-fast);
}

.results-table tbody tr:hover {
    background: var(--bg-tertiary);
}

.col-status {
    width: 50px;
    text-align: center;
}

.col-filename {
    width: 120px;
}

.col-title {
    min-width: 150px;
}

.col-keywords {
    min-width: 200px;
}

.col-category {
    width: 80px;
}

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

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

.status-error {
    background: var(--color-danger-light);
    color: var(--color-danger);
}

.status-pending {
    background: var(--color-warning-light);
    color: var(--color-warning);
}

.keywords-preview {
    display: -webkit-box;
    -webkit-line-clamp: 2;
    line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
    color: var(--text-secondary);
}

.empty-row td {
    padding: var(--spacing-xl);
}

.empty-state {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-md);
    color: var(--text-muted);
}

/* ===== Modal ===== */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.7);
    backdrop-filter: blur(4px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    animation: fadeIn 0.2s ease;
}

@keyframes fadeIn {
    from {
        opacity: 0;
    }

    to {
        opacity: 1;
    }
}

.modal {
    background: var(--bg-secondary);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-color);
    width: 90%;
    max-width: 600px;
    max-height: 90vh;
    display: flex;
    flex-direction: column;
    animation: slideUp 0.3s ease;
}

.modal-large {
    max-width: 900px;
}

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

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

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

.modal-header h2 {
    font-size: 1.25rem;
    font-weight: 600;
}

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

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

/* ===== Settings ===== */
.settings-section {
    margin-bottom: var(--spacing-xl);
}

.settings-section h3 {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-md);
    padding-bottom: var(--spacing-sm);
    border-bottom: 1px solid var(--border-color);
}

.setting-group {
    margin-bottom: var(--spacing-md);
}

.setting-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-md);
}

.setting-label {
    display: block;
    font-size: 0.875rem;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-xs);
}

.setting-input,
.setting-select,
.setting-textarea {
    width: 100%;
    padding: var(--spacing-sm) var(--spacing-md);
    font-size: 0.875rem;
    color: var(--text-primary);
    background: var(--bg-input);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    transition: border-color var(--transition-fast);
}

.setting-input:focus,
.setting-select:focus,
.setting-textarea:focus {
    outline: none;
    border-color: var(--color-primary);
}

.setting-textarea {
    resize: vertical;
    font-family: inherit;
}

.setting-hint {
    font-size: 0.75rem;
    color: var(--text-muted);
    margin-top: var(--spacing-xs);
}

.setting-check {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    cursor: pointer;
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.setting-check input[type="checkbox"] {
    width: 18px;
    height: 18px;
    accent-color: var(--color-primary);
    cursor: pointer;
}

/* ===== Detail Modal ===== */
.detail-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-xl);
}

.detail-preview {
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-primary);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
}

.detail-preview img {
    max-width: 100%;
    max-height: 400px;
    border-radius: var(--radius-md);
}

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

.detail-group label {
    display: block;
    font-size: 0.85rem;
    color: var(--text-muted);
    margin-bottom: var(--spacing-xs);
}

.detail-group p {
    font-size: 0.95rem;
    color: var(--text-primary);
}

.detail-group textarea {
    width: 100%;
    padding: var(--spacing-sm);
    font-size: 0.9rem;
    font-family: inherit;
    color: var(--text-primary);
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    resize: none;
}

/* ===== Toast Notifications ===== */
.toast-container {
    position: fixed;
    bottom: var(--spacing-lg);
    right: var(--spacing-lg);
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
    z-index: 2000;
}

.toast {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-md) var(--spacing-lg);
    background: var(--bg-secondary);
    border-radius: var(--radius-md);
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-lg);
    animation: slideIn 0.3s ease;
    max-width: 400px;
}

@keyframes slideIn {
    from {
        opacity: 0;
        transform: translateX(100px);
    }

    to {
        opacity: 1;
        transform: translateX(0);
    }
}

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

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

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

.toast-icon {
    font-size: 1.25rem;
}

.toast-message {
    flex: 1;
    font-size: 0.9rem;
}

.toast-close {
    background: none;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    padding: var(--spacing-xs);
}

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

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

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

::-webkit-scrollbar-thumb {
    background: var(--bg-tertiary);
    border-radius: var(--radius-full);
}

::-webkit-scrollbar-thumb:hover {
    background: var(--border-color);
}

/* ===== Responsive ===== */
@media (max-width: 1200px) {
    .main-content {
        grid-template-columns: 250px 1fr 350px;
    }
}

@media (max-width: 992px) {
    .main-content {
        grid-template-columns: 1fr;
        grid-template-rows: auto 1fr auto;
    }

    .panel-files,
    .panel-results {
        max-height: 300px;
    }
}