def get_custom_css():
    """Modern blue theme with dark/light mode support"""
    return """
    /* Modern Blue Theme with Dark/Light Mode Support */
    :root {
        /* Light mode colors */
        --primary-blue: #2563eb;
        --primary-blue-light: #3b82f6;
        --primary-blue-dark: #1d4ed8;
        --secondary-blue: #60a5fa;
        --accent-blue: #93c5fd;
        --light-blue: #dbeafe;
        
        --bg-primary: linear-gradient(135deg, #2563eb 0%, #1e40af 50%, #1d4ed8 100%);
        --bg-secondary: #ffffff;
        --bg-card: #f8fafc;
        --bg-hover: #f1f5f9;
        
        --text-primary: #1e293b;
        --text-secondary: #475569;
        --text-muted: #64748b;
        --text-inverse: #ffffff;
        
        --border-color: #e2e8f0;
        --border-hover: #cbd5e1;
        --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
        --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
        --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
        --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1), 0 8px 10px -6px rgb(0 0 0 / 0.1);
        
        --success-color: #22c55e;
        --warning-color: #f59e0b;
        --error-color: #ef4444;
        --info-color: #3b82f6;
        
        /* Radio button specific colors */
        --radio-bg: #ffffff;
        --radio-border: #d1d5db;
        --radio-hover: #f3f4f6;
        --radio-selected: #2563eb;
        --radio-selected-bg: #eff6ff;
        --radio-text: #374151;
    }
    
    /* Dark mode */
    @media (prefers-color-scheme: dark) {
        :root {
            --bg-primary: linear-gradient(135deg, #1e3a8a 0%, #1e40af 50%, #1d4ed8 100%);
            --bg-secondary: #0f172a;
            --bg-card: #1e293b;
            --bg-hover: #334155;
            
            --text-primary: #f1f5f9;
            --text-secondary: #cbd5e1;
            --text-muted: #94a3b8;
            --text-inverse: #0f172a;
            
            --border-color: #334155;
            --border-hover: #475569;
            --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.25);
            --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.3), 0 2px 4px -2px rgb(0 0 0 / 0.3);
            --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.3), 0 4px 6px -4px rgb(0 0 0 / 0.3);
            --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.3), 0 8px 10px -6px rgb(0 0 0 / 0.3);
            
            /* Dark mode radio colors */
            --radio-bg: #374151;
            --radio-border: #4b5563;
            --radio-hover: #4b5563;
            --radio-selected: #60a5fa;
            --radio-selected-bg: #1e3a8a;
            --radio-text: #f9fafb;
        }
    }
    
    /* Manual dark mode toggle */
    .dark-mode {
        --bg-primary: linear-gradient(135deg, #1e3a8a 0%, #1e40af 50%, #1d4ed8 100%);
        --bg-secondary: #0f172a;
        --bg-card: #1e293b;
        --bg-hover: #334155;
        
        --text-primary: #f1f5f9;
        --text-secondary: #cbd5e1;
        --text-muted: #94a3b8;
        --text-inverse: #0f172a;
        
        --border-color: #334155;
        --border-hover: #475569;
        
        /* Dark mode radio colors */
        --radio-bg: #374151;
        --radio-border: #4b5563;
        --radio-hover: #4b5563;
        --radio-selected: #60a5fa;
        --radio-selected-bg: #1e3a8a;
        --radio-text: #f9fafb;
    }
    
    /* Global styles */
    .gradio-container {
        background: var(--bg-primary);
        font-family: 'Inter', 'Segoe UI', system-ui, sans-serif;
        color: var(--text-primary);
        min-height: 100vh;
    }
    
    /* Header */
    .header {
        text-align: center;
        background: rgba(255, 255, 255, 0.3);
        backdrop-filter: blur(20px);
        border-radius: 24px;
        padding: 3rem 2rem;
        margin: 2rem;
        border: 1px solid rgba(255, 255, 255, 0.2);
        box-shadow: var(--shadow-xl);
    }
    
    .header h1 {
        color: rgba(255, 255, 255, 0.9) !important;
        font-size: 3rem;
        font-weight: 800;
        margin: 0;
        text-shadow: 0 4px 8px rgba(0, 0, 0, 0.3);
        letter-spacing: -0.025em;
    }
    
    .header p {
        color: rgba(255, 255, 255, 0.9);
        font-size: 1.25rem;
        margin: 1rem 0 0;
        font-weight: 400;
    }
    
    /* Input container */
    .input-container {
        background: var(--bg-card);
        border-radius: 20px;
        padding: 2rem;
        margin: 1rem;
        box-shadow: var(--shadow-lg);
        border: 1px solid var(--border-color);
        transition: all 0.3s ease;
    }
    
    .input-container:hover {
        box-shadow: var(--shadow-xl);
        border-color: var(--border-hover);
    }

    /* Labels */
    .gr-form label {
        color: var(--text-primary) !important;
        font-weight: 600 !important;
        margin-bottom: 0.5rem !important;
    }
    


    /* Additional selectors to ensure white background */
    .gr-textbox {
        background: white !important;
    }
    
    .gr-textbox textarea {
        background: white !important;
        color: #1e293b !important;
    }
    
    /* Target the specific textbox container */
    div[data-testid="textbox"] {
        background: white !important;
    }
    
    div[data-testid="textbox"] textarea {
        background: white !important;
        color: #1e293b !important;
    }

    /* Textarea placeholder */
    

    /* Radio button container */
    .gr-radio {
        background: transparent !important;
    }
    
    .gr-radio .gr-box {
        background: var(--bg-card) !important;
        border: 1px solid var(--border-color) !important;
        border-radius: 12px !important;
        padding: 1rem !important;
        box-shadow: none !important;
    }

    /* Radio button fieldset */
    .gr-radio fieldset {
        border: none !important;
        padding: 0 !important;
        margin: 0 !important;
    }

    /* Individual radio buttons */
    .gr-radio label {
        background: var(--radio-bg) !important;
        border: 2px solid var(--radio-border) !important;
        color: var(--radio-text) !important;
        border-radius: 8px !important;
        padding: 0.75rem 1.5rem !important;
        margin: 0.25rem !important;
        cursor: pointer !important;
        transition: all 0.3s ease !important;
        font-weight: 500 !important;
        display: flex !important;
        align-items: center !important;
        justify-content: center !important;
    }

    /* Radio button hover effect */
    .gr-radio label:hover {
        background: var(--radio-hover) !important;
        border-color: var(--radio-selected) !important;
        transform: translateY(-1px) !important;
        box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1) !important;
    }

    /* Selected radio button */
    .gr-radio input[type="radio"]:checked + label {
        background: var(--radio-selected-bg) !important;
        border-color: var(--radio-selected) !important;
        color: var(--radio-selected) !important;
        font-weight: 600 !important;
        box-shadow: 0 0 0 2px rgba(37, 99, 235, 0.2) !important;
    }

    /* Hide the actual radio input */
    .gr-radio input[type="radio"] {
        display: none !important;
    }

    /* Radio group info text */
    .gr-radio .gr-info {
        color: var(--text-secondary) !important;
        font-size: 0.875rem !important;
        margin-top: 0.5rem !important;
    }
        
    /* Sentiment results */
    .sentiment-result {
        text-align: center;
        padding: 2rem;
        border-radius: 20px;
        margin: 1rem 0;
        background: var(--bg-card);
        border: 2px solid var(--border-color);
        box-shadow: var(--shadow-lg);
        transition: all 0.3s ease;
    }
    
    .sentiment-result[data-sentiment="positive"] {
        border-color: var(--success-color);
        background: linear-gradient(135deg, rgba(34, 197, 94, 0.1), rgba(34, 197, 94, 0.05));
    }
    
    .sentiment-result[data-sentiment="negative"] {
        border-color: var(--error-color);
        background: linear-gradient(135deg, rgba(239, 68, 68, 0.1), rgba(239, 68, 68, 0.05));
    }
    
    .sentiment-result[data-sentiment="neutral"] {
        border-color: var(--info-color);
        background: linear-gradient(135deg, rgba(59, 130, 246, 0.1), rgba(59, 130, 246, 0.05));
    }
    
    .sentiment-result.error {
        border-color: var(--error-color);
        background: linear-gradient(135deg, rgba(239, 68, 68, 0.1), rgba(239, 68, 68, 0.05));
        color: var(--error-color);
    }
    
    .sentiment-result.warning {
        border-color: var(--warning-color);
        background: linear-gradient(135deg, rgba(245, 158, 11, 0.1), rgba(245, 158, 11, 0.05));
        color: var(--warning-color);
    }
    
    .result-title {
        margin: 0 0 1rem;
        color: #ffffff;
        font-size: 1.75rem;
        font-weight: 700;
    }
    
    .sentiment-label {
        font-size: 2rem;
        font-weight: 800;
        margin: 1rem 0;
        color: #ffffff;
        letter-spacing: 0.05em;
    }
    
    .model-info, .confidence-info {
        color: #ffffff;
        font-size: 1rem;
        margin: 0.5rem 0;
        font-weight: 500;
    }
    
    .confidence-info {
        font-size: 0.875rem;
    }
    
    /* Statistics */
    .stats-container {
        background: var(--bg-card);
        padding: 2rem;
        border-radius: 20px;
        color: var(--text-primary);
        text-align: center;
        box-shadow: var(--shadow-lg);
        border: 1px solid var(--border-color);
    }
    
    .stats-title {
        color: var(--text-primary);
        margin-bottom: 1.5rem;
        font-size: 1.5rem;
        font-weight: 700;
    }
    
    .stats-total {
        font-weight: 600;
        margin: 1rem 0;
        color: var(--text-primary);
        font-size: 1.125rem;
    }
    
    .stats-section {
        margin: 1.5rem 0;
        text-align: left;
    }
    
    .stats-section p {
        font-weight: 600;
        color: var(--text-secondary);
        margin-bottom: 0.75rem;
    }

    strong {
        font-weight: bold;
        color: var(--text-primary);
    }
    
    .stats-list {
        list-style: none;
        padding: 0;
        margin: 0;
    }
    
    .stats-item {
        padding: 0.5rem 0;
        color: var(--text-secondary);
        font-weight: 500;
        border-bottom: 1px solid var(--border-color);
    }
    
    .stats-item:last-child {
        border-bottom: none;
    }
    
    .stats-item.stats-positive {
        color: var(--success-color);
    }
    
    .stats-item.stats-negative {
        color: var(--error-color);
    }
    
    .stats-item.stats-neutral {
        color: var(--info-color);
    }
    
    .no-stats, .error-stats {
        text-align: center;
        padding: 2rem;
        color: var(--text-muted);
        background: var(--bg-card);
        border-radius: 16px;
        border: 1px solid var(--border-color);
    }
    
    /* Buttons */
    .submit-btn {
        background: linear-gradient(135deg, var(--primary-blue), var(--primary-blue-dark)) !important;
        border: none !important;
        border-radius: 16px !important;
        padding: 1rem 2rem !important;
        color: var(--text-inverse) !important;
        font-weight: 600 !important;
        font-size: 1rem !important;
        cursor: pointer !important;
        transition: all 0.3s ease !important;
        box-shadow: var(--shadow-md) !important;
    }
    
    .submit-btn:hover {
        color: var(--text-inverse) !important;
        transform: translateY(-2px) !important;
        box-shadow: var(--shadow-lg) !important;
        background: linear-gradient(135deg, var(--primary-blue-light), var(--primary-blue)) !important;
    }
    
    /* Footer */
    .footer {
        text-align: center;
        background: var(--bg-card);
        color: var(--text-inverse);
        padding: 2rem;
        border-radius: 20px;
        margin: 2rem;
        backdrop-filter: blur(10px);
    }
    
    .footer h3 {
        margin: 0 0 1rem;
        font-weight: 700;
    }
    
    .social-links {
        margin: 1rem 0;
    }
    
    .social-links a {
        color: var(--secondary-blue);
        text-decoration: none;
        margin: 0 1rem;
        font-weight: 600;
        transition: color 0.3s ease;
    }
    
    .social-links a:hover {
        color: var(--accent-blue);
        text-decoration: underline;
    }
    
    /* Theme toggle button */
    .theme-toggle {
        margin-top: 1rem !important;
        background: var(--bg-card) !important;
        color: var(--text-primary) !important;
        padding: 0.5rem 1rem !important;
        border-radius: 8px !important;
        border: 1px solid var(--border-color) !important;
        cursor: pointer !important;
        transition: all 0.3s ease !important;
    }
    
    .theme-toggle:hover {
        background: var(--bg-hover) !important;
        border-color: var(--border-hover) !important;
    }
    
    /* Responsive design */
    @media (max-width: 768px) {
        .header {
            margin: 1rem !important;
            padding: 2rem 1rem !important;
        }
        
        .header h1 {
            font-size: 2rem !important;
        }
        
        .header p {
            font-size: 1rem !important;
        }
        
        .input-container {
            margin: 0.5rem !important;
            padding: 1.5rem !important;
        }
        
        .sentiment-result {
            padding: 1.5rem !important;
        }
        
        .stats-container {
            padding: 1.5rem !important;
        }
        
        .footer {
            margin: 1rem !important;
            padding: 1.5rem !important;
        }
        
        /* Mobile radio buttons */
        .gr-radio label {
            padding: 0.5rem 1rem !important;
            font-size: 0.9rem !important;
        }
    }
    
    /* Smooth transitions for theme switching */
    * {
        transition: background-color 0.3s ease, border-color 0.3s ease, color 0.3s ease !important;
    }
    
    /* Fix for Gradio's default styles that might interfere */
    .gradio-container * {
        box-sizing: border-box;
    }
    
    /* Additional fixes for Gradio components */
    .gr-form {
        background: transparent !important;
    }
    
    .gr-panel {
        background: var(--bg-card) !important;
        border: 1px solid var(--border-color) !important;
    }
    
    /* Examples section - Main container */
    .gr-examples, .examples-section {
        background: var(--bg-card) !important;
        border: 1px solid var(--border-color) !important;
        border-radius: 12px !important;
        padding: 1.5rem !important;
        margin-top: 1rem !important;
        box-shadow: var(--shadow-md) !important;
    }
    
    /* Examples label */
    .gr-examples .gr-form > label, .examples-section .gr-form > label {
        color: var(--text-primary) !important;
        font-weight: 600 !important;
        font-size: 1rem !important;
        margin-bottom: 1rem !important;
        display: block !important;
    }
    
    /* Examples list container */
    .gr-examples .gr-examples-list, .examples-section .gr-examples-list {
        background: transparent !important;
        border: none !important;
        padding: 0 !important;
    }
    
    /* Individual example buttons */
    .gr-examples .gr-examples-list button, .examples-section .gr-examples-list button {
        background: var(--radio-bg) !important;
        border: 2px solid var(--radio-border) !important;
        color: var(--radio-text) !important;
        border-radius: 8px !important;
        padding: 0.75rem 1rem !important;
        margin: 0.25rem !important;
        transition: all 0.3s ease !important;
        font-weight: 500 !important;
        text-align: left !important;
        cursor: pointer !important;
        min-height: auto !important;
        white-space: normal !important;
        word-wrap: break-word !important;
    }
    
    /* Example button hover effect */
    .gr-examples .gr-examples-list button:hover, .examples-section .gr-examples-list button:hover {
        background: var(--radio-hover) !important;
        border-color: var(--radio-selected) !important;
        transform: translateY(-1px) !important;
        box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1) !important;
        color: var(--radio-text) !important;
    }
    
    /* Example button active/clicked state */
    .gr-examples .gr-examples-list button:active, .examples-section .gr-examples-list button:active {
        transform: translateY(0) !important;
        background: var(--radio-selected-bg) !important;
        border-color: var(--radio-selected) !important;
        color: var(--radio-selected) !important;
    }
    
    /* Dark mode specific adjustments for examples */
    .dark-mode .gr-examples .gr-examples-list button:hover, .dark-mode .examples-section .gr-examples-list button:hover {
        box-shadow: 0 2px 8px rgba(0, 0, 0, 0.3) !important;
    }
    
    @media (prefers-color-scheme: dark) {
        .gr-examples .gr-examples-list button:hover, .examples-section .gr-examples-list button:hover {
            box-shadow: 0 2px 8px rgba(0, 0, 0, 0.3) !important;
        }
    }
    
    /* Responsive design for examples */
    @media (max-width: 768px) {
        .gr-examples, .examples-section {
            padding: 1rem !important;
            margin-top: 0.5rem !important;
        }
        
        .gr-examples .gr-examples-list button, .examples-section .gr-examples-list button {
            padding: 0.5rem 0.75rem !important;
            font-size: 0.9rem !important;
            margin: 0.2rem !important;
        }
    }
    """