class CSSStyles:
    """
    CSS styling configuration for the SceneWeaver application.
    Professional design system with clean typography and modern aesthetics.
    """

    @staticmethod
    def get_main_css() -> str:
        """
        Get the main CSS styling for the application.

        Returns:
            Complete CSS string for Gradio interface styling
        """
        return """
        /* Import professional fonts */
        @import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&family=JetBrains+Mono:wght@400;500&display=swap');

        /* CSS Variables - Professional color system */
        :root {
            /* Primary brand colors */
            --primary-color: #1e3a5f;
            --primary-hover: #2d5a8a;
            --primary-light: #e8f4fd;

            /* Accent colors */
            --accent-color: #3b82f6;
            --accent-hover: #2563eb;
            --accent-light: #dbeafe;

            /* Status colors */
            --success-color: #10b981;
            --warning-color: #f59e0b;
            --error-color: #ef4444;

            /* Neutral colors */
            --bg-primary: #ffffff;
            --bg-secondary: #f8fafc;
            --bg-tertiary: #f1f5f9;
            --text-primary: #1e293b;
            --text-secondary: #475569;
            --text-muted: #94a3b8;
            --border-color: #e2e8f0;
            --border-light: #f1f5f9;

            /* Shadows */
            --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
            --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -2px rgba(0, 0, 0, 0.1);
            --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -4px rgba(0, 0, 0, 0.1);
            --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 8px 10px -6px rgba(0, 0, 0, 0.1);

            /* Border radius */
            --radius-sm: 6px;
            --radius-md: 8px;
            --radius-lg: 12px;
            --radius-xl: 16px;

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

        /* Global styles */
        * {
            font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif !important;
            -webkit-font-smoothing: antialiased !important;
            -moz-osx-font-smoothing: grayscale !important;
        }

        /* Main container */
        .gradio-container {
            background: linear-gradient(180deg, #f8fafc 0%, #f1f5f9 100%) !important;
            min-height: 100vh !important;
            padding: 24px !important;
        }

        /* ===== HEADER SECTION ===== */
        .main-header {
            text-align: center !important;
            padding: 48px 32px 40px !important;
            margin-bottom: 32px !important;
            background: linear-gradient(135deg, var(--bg-primary) 0%, var(--bg-secondary) 100%) !important;
            border-radius: var(--radius-xl) !important;
            box-shadow: var(--shadow-md) !important;
            border: 1px solid var(--border-light) !important;
        }

        .main-title {
            font-size: 2.75rem !important;
            font-weight: 700 !important;
            color: var(--primary-color) !important;
            margin: 0 0 12px 0 !important;
            letter-spacing: -0.03em !important;
            display: flex !important;
            align-items: center !important;
            justify-content: center !important;
            gap: 14px !important;
            line-height: 1.2 !important;
        }

        .title-emoji {
            font-size: 2.5rem !important;
            filter: drop-shadow(0 2px 4px rgba(0,0,0,0.15)) !important;
            transition: transform var(--transition-normal) !important;
        }

        .title-emoji:hover {
            transform: scale(1.1) rotate(-5deg) !important;
        }

        .main-subtitle {
            font-size: 1.1rem !important;
            color: var(--text-secondary) !important;
            font-weight: 400 !important;
            margin: 0 !important;
            line-height: 1.5 !important;
            max-width: 700px !important;
            margin: 0 auto !important;
        }

        /* ===== CARD SYSTEM ===== */
        .feature-card {
            background: var(--bg-primary) !important;
            border: 1px solid var(--border-color) !important;
            border-radius: var(--radius-lg) !important;
            padding: 24px !important;
            margin-bottom: 20px !important;
            box-shadow: var(--shadow-sm) !important;
            transition: all var(--transition-normal) !important;
            position: relative !important;
        }

        .feature-card:hover {
            border-color: var(--accent-color) !important;
            box-shadow: var(--shadow-lg) !important;
            /* Removed transform to fix dropdown positioning issue in Gradio 5.x */
            /* transform: translateY(-2px) !important; */
        }

        .card-title {
            font-size: 1.25rem !important;
            font-weight: 600 !important;
            color: var(--text-primary) !important;
            margin-bottom: 16px !important;
            display: flex !important;
            align-items: center !important;
            gap: 10px !important;
        }

        .section-emoji {
            font-size: 1.2rem !important;
            filter: drop-shadow(0 1px 2px rgba(0,0,0,0.1)) !important;
        }

        /* ===== INPUT COMPONENTS ===== */
        .input-field {
            border: 1px solid var(--border-color) !important;
            border-radius: var(--radius-md) !important;
            background: var(--bg-primary) !important;
            transition: all var(--transition-fast) !important;
        }

        .input-field:focus-within {
            border-color: var(--accent-color) !important;
            box-shadow: 0 0 0 3px var(--accent-light) !important;
        }

        /* ===== BUTTONS ===== */
        .primary-button {
            background: linear-gradient(135deg, var(--accent-color) 0%, var(--accent-hover) 100%) !important;
            color: white !important;
            border: none !important;
            border-radius: var(--radius-md) !important;
            padding: 14px 28px !important;
            font-size: 1rem !important;
            font-weight: 600 !important;
            cursor: pointer !important;
            transition: all var(--transition-normal) !important;
            box-shadow: var(--shadow-md) !important;
        }

        .primary-button:hover {
            transform: translateY(-2px) !important;
            box-shadow: var(--shadow-lg) !important;
            filter: brightness(1.05) !important;
        }

        .secondary-button {
            background: var(--bg-primary) !important;
            color: var(--accent-color) !important;
            border: 1.5px solid var(--accent-color) !important;
            border-radius: var(--radius-md) !important;
            padding: 12px 20px !important;
            font-size: 0.95rem !important;
            font-weight: 500 !important;
            cursor: pointer !important;
            transition: all var(--transition-fast) !important;
        }

        .secondary-button:hover {
            background: var(--accent-light) !important;
            transform: translateY(-1px) !important;
        }

        /* ===== RESULTS GALLERY ===== */
        #results-gallery-centered {
            display: flex !important;
            flex-direction: column !important;
            align-items: center !important;
        }

        #results-gallery-centered .gradio-tabs {
            width: 100% !important;
        }

        .result-gallery {
            border-radius: var(--radius-lg) !important;
            overflow: hidden !important;
            border: 1px solid var(--border-color) !important;
            box-shadow: var(--shadow-md) !important;
        }

        .result-gallery img {
            width: 100% !important;
            height: auto !important;
            object-fit: contain !important;
        }

        /* ===== STATUS PANEL ===== */
        .status-panel {
            background: var(--bg-secondary) !important;
            border: 1px solid var(--border-color) !important;
            border-radius: var(--radius-md) !important;
            padding: 12px 16px !important;
            margin: 16px 0 !important;
        }

        .status-ready {
            color: var(--success-color) !important;
            font-weight: 500 !important;
        }

        /* ===== LOADING NOTICE ===== */
        .loading-notice {
            background: linear-gradient(135deg, #fef3c7 0%, #fde68a 100%) !important;
            border: 1px solid #f59e0b !important;
            border-radius: var(--radius-md) !important;
            padding: 14px 18px !important;
            margin: 16px 0 !important;
            display: flex !important;
            align-items: center !important;
            gap: 12px !important;
        }

        .loading-notice-icon {
            font-size: 1.3rem !important;
            flex-shrink: 0 !important;
        }

        .loading-notice-text {
            color: #92400e !important;
            font-size: 0.9rem !important;
            font-weight: 500 !important;
            line-height: 1.5 !important;
        }

        /* ===== QUICK START GUIDE ===== */
        .user-guidance-panel {
            background: var(--bg-secondary) !important;
            border: 1px solid var(--border-color) !important;
            border-radius: var(--radius-md) !important;
            margin: 16px 0 !important;
            overflow: hidden !important;
        }

        .guidance-summary {
            background: var(--bg-primary) !important;
            padding: 12px 16px !important;
            cursor: pointer !important;
            font-weight: 500 !important;
            color: var(--text-primary) !important;
            transition: background var(--transition-fast) !important;
            list-style: none !important;
            display: flex !important;
            align-items: center !important;
            gap: 8px !important;
            border-bottom: 1px solid var(--border-color) !important;
        }

        .guidance-summary:hover {
            background: var(--accent-light) !important;
        }

        .guidance-summary::-webkit-details-marker {
            display: none !important;
        }

        .guidance-content {
            padding: 16px !important;
            color: var(--text-secondary) !important;
            line-height: 1.6 !important;
        }

        .guidance-content p {
            margin: 8px 0 !important;
            font-size: 0.9rem !important;
        }

        .guidance-content strong {
            color: var(--primary-color) !important;
            font-weight: 600 !important;
        }

        /* ===== FOOTER ===== */
        .app-footer {
            background: var(--bg-primary) !important;
            border: 1px solid var(--border-color) !important;
            border-radius: var(--radius-lg) !important;
            padding: 32px !important;
            margin-top: 32px !important;
            text-align: center !important;
        }

        .footer-powered {
            margin-bottom: 20px !important;
        }

        .footer-powered-title {
            font-size: 0.85rem !important;
            font-weight: 500 !important;
            color: var(--text-muted) !important;
            text-transform: uppercase !important;
            letter-spacing: 0.1em !important;
            margin-bottom: 16px !important;
        }

        .footer-tech-grid {
            display: flex !important;
            flex-wrap: wrap !important;
            justify-content: center !important;
            gap: 12px !important;
            margin-bottom: 24px !important;
        }

        .footer-tech-item {
            background: var(--bg-secondary) !important;
            border: 1px solid var(--border-color) !important;
            border-radius: var(--radius-sm) !important;
            padding: 8px 16px !important;
            font-size: 0.85rem !important;
            font-weight: 500 !important;
            color: var(--text-secondary) !important;
            transition: all var(--transition-fast) !important;
        }

        .footer-tech-item:hover {
            background: var(--accent-light) !important;
            border-color: var(--accent-color) !important;
            color: var(--accent-color) !important;
        }

        .footer-divider {
            height: 1px !important;
            background: var(--border-color) !important;
            margin: 20px auto !important;
            max-width: 400px !important;
        }

        .footer-copyright {
            font-size: 0.85rem !important;
            color: var(--text-muted) !important;
            font-weight: 400 !important;
        }

        .footer-copyright a {
            color: var(--accent-color) !important;
            text-decoration: none !important;
            font-weight: 500 !important;
        }

        .footer-copyright a:hover {
            text-decoration: underline !important;
        }

        /* ===== TABS STYLING ===== */
        .gradio-tabs {
            border: none !important;
        }

        .gradio-tabs > .tab-nav {
            background: var(--bg-secondary) !important;
            border-radius: var(--radius-md) !important;
            padding: 4px !important;
            gap: 4px !important;
            border: 1px solid var(--border-color) !important;
            margin-bottom: 16px !important;
        }

        .gradio-tabs > .tab-nav > button {
            border-radius: var(--radius-sm) !important;
            padding: 10px 20px !important;
            font-weight: 500 !important;
            font-size: 0.9rem !important;
            transition: all var(--transition-fast) !important;
            border: none !important;
            background: transparent !important;
            color: var(--text-secondary) !important;
        }

        .gradio-tabs > .tab-nav > button.selected {
            background: var(--bg-primary) !important;
            color: var(--accent-color) !important;
            box-shadow: var(--shadow-sm) !important;
        }

        .gradio-tabs > .tab-nav > button:hover:not(.selected) {
            background: var(--bg-primary) !important;
            color: var(--text-primary) !important;
        }

        /* ===== ACCORDION ===== */
        .gradio-accordion {
            border: 1px solid var(--border-color) !important;
            border-radius: var(--radius-md) !important;
            overflow: hidden !important;
            margin-top: 12px !important;
        }

        .gradio-accordion > .label-wrap {
            background: var(--bg-secondary) !important;
            padding: 12px 16px !important;
            font-weight: 500 !important;
        }

        .gradio-accordion > .label-wrap:hover {
            background: var(--bg-tertiary) !important;
        }

        /* ===== RESPONSIVE ===== */
        @media (max-width: 768px) {
            .main-title {
                font-size: 2rem !important;
            }

            .main-subtitle {
                font-size: 1rem !important;
            }

            .footer-tech-grid {
                gap: 8px !important;
            }

            .footer-tech-item {
                padding: 6px 12px !important;
                font-size: 0.8rem !important;
            }
        }

        /* ===== EMOJI ENHANCEMENT ===== */
        .emoji-enhanced {
            display: inline-block !important;
            font-style: normal !important;
            filter: drop-shadow(0 1px 2px rgba(0,0,0,0.1)) !important;
            transition: transform var(--transition-fast) !important;
        }

        .emoji-enhanced:hover {
            transform: scale(1.1) !important;
        }

        /* ===== IMAGE DISPLAY FIX ===== */
        .gradio-image {
            min-height: 200px !important;
        }

        .gradio-image img {
            max-height: 500px !important;
            object-fit: contain !important;
        }

        /* ===== SCENE TEMPLATE DROPDOWN ===== */
        .template-dropdown {
            margin: 8px 0 !important;
        }

        .template-dropdown select,
        .template-dropdown input {
            font-size: 0.95rem !important;
            padding: 10px 14px !important;
            border-radius: var(--radius-md) !important;
            border: 1px solid var(--border-color) !important;
            background: var(--bg-primary) !important;
            transition: all var(--transition-fast) !important;
        }

        .template-dropdown select:hover,
        .template-dropdown input:hover {
            border-color: var(--accent-color) !important;
        }

        .template-dropdown select:focus,
        .template-dropdown input:focus {
            border-color: var(--accent-color) !important;
            box-shadow: 0 0 0 3px var(--accent-light) !important;
            outline: none !important;
        }

        /* Dropdown option styling */
        .template-dropdown option {
            padding: 8px 12px !important;
            font-size: 0.95rem !important;
        }

        /* ===== INPAINTING UI STYLES ===== */
        .inpainting-header {
            text-align: center !important;
            padding: 16px !important;
            margin-bottom: 16px !important;
            background: linear-gradient(135deg, var(--primary-light) 0%, var(--accent-light) 100%) !important;
            border-radius: var(--radius-lg) !important;
            border: 1px solid var(--border-color) !important;
        }

        .inpainting-header h3 {
            font-size: 1.4rem !important;
            font-weight: 600 !important;
            color: var(--primary-color) !important;
            margin: 0 0 8px 0 !important;
        }

        .inpainting-header p {
            font-size: 0.95rem !important;
            color: var(--text-secondary) !important;
            margin: 0 !important;
        }

        /* Main mode tabs styling */
        #main-mode-tabs {
            margin-bottom: 16px !important;
        }

        #main-mode-tabs > .tab-nav {
            background: var(--bg-secondary) !important;
            border-radius: var(--radius-lg) !important;
            padding: 6px !important;
            gap: 6px !important;
            border: 1px solid var(--border-color) !important;
        }

        #main-mode-tabs > .tab-nav > button {
            border-radius: var(--radius-md) !important;
            padding: 12px 24px !important;
            font-weight: 600 !important;
            font-size: 1rem !important;
            transition: all var(--transition-normal) !important;
            border: none !important;
            background: transparent !important;
            color: var(--text-secondary) !important;
        }

        #main-mode-tabs > .tab-nav > button.selected {
            background: linear-gradient(135deg, var(--accent-color) 0%, var(--accent-hover) 100%) !important;
            color: white !important;
            box-shadow: var(--shadow-md) !important;
        }

        #main-mode-tabs > .tab-nav > button:hover:not(.selected) {
            background: var(--bg-primary) !important;
            color: var(--text-primary) !important;
        }

        /* Mask editor styling */
        .mask-editor-container {
            border: 2px dashed var(--border-color) !important;
            border-radius: var(--radius-lg) !important;
            padding: 8px !important;
            background: var(--bg-secondary) !important;
            transition: border-color var(--transition-fast) !important;
        }

        .mask-editor-container:hover {
            border-color: var(--accent-color) !important;
        }

        /* Inpainting template cards */
        .inpainting-gallery {
            margin: 16px 0 !important;
        }

        .inpainting-category {
            margin-bottom: 20px !important;
        }

        .inpainting-category-title {
            font-size: 0.9rem !important;
            font-weight: 600 !important;
            color: var(--text-secondary) !important;
            margin-bottom: 12px !important;
            padding-bottom: 8px !important;
            border-bottom: 1px solid var(--border-color) !important;
        }

        .inpainting-grid {
            display: grid !important;
            grid-template-columns: repeat(auto-fill, minmax(120px, 1fr)) !important;
            gap: 10px !important;
        }

        .inpainting-card {
            display: flex !important;
            flex-direction: column !important;
            align-items: center !important;
            justify-content: center !important;
            padding: 14px 10px !important;
            background: var(--bg-primary) !important;
            border: 1px solid var(--border-color) !important;
            border-radius: var(--radius-md) !important;
            cursor: pointer !important;
            transition: all var(--transition-normal) !important;
            min-height: 80px !important;
        }

        .inpainting-card:hover {
            background: var(--accent-light) !important;
            border-color: var(--accent-color) !important;
            transform: translateY(-2px) !important;
            box-shadow: var(--shadow-md) !important;
        }

        .inpainting-card.selected {
            background: var(--accent-light) !important;
            border-color: var(--accent-color) !important;
            box-shadow: 0 0 0 2px var(--accent-color) !important;
        }

        .inpainting-icon {
            font-size: 1.6rem !important;
            margin-bottom: 6px !important;
        }

        .inpainting-name {
            font-size: 0.8rem !important;
            font-weight: 500 !important;
            color: var(--text-primary) !important;
            text-align: center !important;
            line-height: 1.2 !important;
        }

        .inpainting-desc {
            font-size: 0.7rem !important;
            color: var(--text-muted) !important;
            text-align: center !important;
            margin-top: 4px !important;
        }

        /* ControlNet mode toggle */
        .controlnet-mode-toggle {
            display: flex !important;
            gap: 8px !important;
            margin: 8px 0 !important;
        }

        .controlnet-mode-btn {
            flex: 1 !important;
            padding: 10px 16px !important;
            border: 1px solid var(--border-color) !important;
            border-radius: var(--radius-md) !important;
            background: var(--bg-primary) !important;
            color: var(--text-secondary) !important;
            font-weight: 500 !important;
            cursor: pointer !important;
            transition: all var(--transition-fast) !important;
        }

        .controlnet-mode-btn:hover {
            border-color: var(--accent-color) !important;
            color: var(--accent-color) !important;
        }

        .controlnet-mode-btn.active {
            background: var(--accent-color) !important;
            border-color: var(--accent-color) !important;
            color: white !important;
        }

        /* Preview badge */
        .preview-badge {
            display: inline-flex !important;
            align-items: center !important;
            gap: 4px !important;
            padding: 4px 10px !important;
            background: var(--warning-color) !important;
            color: white !important;
            font-size: 0.75rem !important;
            font-weight: 600 !important;
            border-radius: var(--radius-sm) !important;
            text-transform: uppercase !important;
        }

        /* Quality score display */
        .quality-score {
            display: inline-flex !important;
            align-items: center !important;
            gap: 6px !important;
            padding: 6px 12px !important;
            border-radius: var(--radius-md) !important;
            font-weight: 500 !important;
            font-size: 0.9rem !important;
        }

        .quality-score.excellent {
            background: rgba(16, 185, 129, 0.1) !important;
            color: var(--success-color) !important;
        }

        .quality-score.good {
            background: rgba(59, 130, 246, 0.1) !important;
            color: var(--accent-color) !important;
        }

        .quality-score.warning {
            background: rgba(245, 158, 11, 0.1) !important;
            color: var(--warning-color) !important;
        }

        .quality-score.poor {
            background: rgba(239, 68, 68, 0.1) !important;
            color: var(--error-color) !important;
        }

        /* Responsive adjustments for inpainting */
        @media (max-width: 768px) {
            .inpainting-grid {
                grid-template-columns: repeat(2, 1fr) !important;
            }

            #main-mode-tabs > .tab-nav > button {
                padding: 10px 16px !important;
                font-size: 0.9rem !important;
            }
        }

        /* ===== DROPDOWN POSITIONING FIX FOR GRADIO 4.x/5.x ===== */
        /* Fix dropdown list positioning issue in left column */
        .feature-card {
            overflow: visible !important;
        }

        /* Ensure dropdown portal/overlay renders correctly */
        .gradio-dropdown,
        .gradio-dropdown > div,
        [data-testid="dropdown"] {
            position: relative !important;
        }

        /* Fix dropdown listbox positioning */
        .gradio-dropdown ul,
        .gradio-dropdown [role="listbox"],
        [data-testid="dropdown"] ul {
            position: absolute !important;
            z-index: 9999 !important;
            left: 0 !important;
            top: 100% !important;
            width: 100% !important;
            max-height: 300px !important;
            overflow-y: auto !important;
            background: var(--bg-primary) !important;
            border: 1px solid var(--border-color) !important;
            border-radius: var(--radius-md) !important;
            box-shadow: var(--shadow-lg) !important;
            margin-top: 4px !important;
        }
        """