/* CSS Custom Properties for Modern Design System */
        :root {
            --font-display: 'Outfit', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
            --font-body: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
            
            --bg-base: #0a0a0d;
            --bg-surface: rgba(29, 30, 34, 0.45);
            --bg-surface-hover: rgba(40, 41, 46, 0.6);
            --bg-surface-translucent: rgba(255, 255, 255, 0.03);
            --bg-surface-button: rgba(255, 255, 255, 0.05);
            --bg-surface-button-hover: rgba(255, 255, 255, 0.08);
            --bg-list: rgba(0, 0, 0, 0.15);
            --bg-card: rgba(255, 255, 255, 0.01);
            --bg-badge: rgba(255, 255, 255, 0.06);
            --bg-guide-header: rgba(255, 255, 255, 0.02);
            --bg-guide-content: rgba(255, 255, 255, 0.03);
            --border-color: rgba(255, 255, 255, 0.08);
            --border-hover: rgba(156, 206, 43, 0.35);
            --border-input: rgba(255, 255, 255, 0.25);
            --scrollbar-thumb: rgba(255, 255, 255, 0.1);
            --scrollbar-thumb-hover: rgba(255, 255, 255, 0.2);
            --color-code-text: #c7d2fe;
            --heading-gradient: linear-gradient(135deg, #ffffff 30%, #a5b4fc 100%);
            
            --color-primary: #9cce2b;
            --color-primary-rgb: 156, 206, 43;
            --color-primary-glow: rgba(156, 206, 43, 0.15);
            --color-secondary: #595b60;
            --color-secondary-rgb: 89, 91, 96;
            --color-accent: #bdf04f;
            
            --color-success: #10b981;
            --color-success-bg: rgba(16, 185, 129, 0.1);
            --color-error: #f43f5e;
            --color-error-bg: rgba(244, 63, 94, 0.1);
            --color-warning: #f59e0b;
            
            --text-main: #f3f4f6;
            --text-muted: #9ca3af;
            --text-inverse: #0a0a0d;

            --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.35);
            --shadow-md: 0 8px 32px rgba(0, 0, 0, 0.5);
            --shadow-lg: 0 16px 48px rgba(0, 0, 0, 0.65);
            
            --radius-sm: 8px;
            --radius-md: 16px;
            --radius-lg: 24px;
            --radius-full: 9999px;
            
            --transition-smooth: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --transition-bounce: all 0.4s cubic-bezier(0.34, 1.56, 0.64, 1);

            color-scheme: dark;
        }

        /* Light mode override colors */
        :root[data-theme="light"] {
            --bg-base: #f4f5f7;
            --bg-surface: rgba(255, 255, 255, 0.7);
            --bg-surface-hover: rgba(255, 255, 255, 0.85);
            --bg-surface-translucent: rgba(0, 0, 0, 0.02);
            --bg-surface-button: rgba(0, 0, 0, 0.04);
            --bg-surface-button-hover: rgba(0, 0, 0, 0.08);
            --bg-list: rgba(0, 0, 0, 0.02);
            --bg-card: rgba(0, 0, 0, 0.01);
            --bg-badge: rgba(0, 0, 0, 0.04);
            --bg-guide-header: rgba(0, 0, 0, 0.02);
            --bg-guide-content: rgba(0, 0, 0, 0.01);
            --border-color: rgba(0, 0, 0, 0.08);
            --border-hover: rgba(130, 176, 28, 0.35);
            --border-input: rgba(0, 0, 0, 0.2);
            --scrollbar-thumb: rgba(0, 0, 0, 0.12);
            --scrollbar-thumb-hover: rgba(0, 0, 0, 0.22);
            --color-code-text: #5d7f14;
            --heading-gradient: linear-gradient(135deg, #1f2937 30%, #595b60 100%);
            
            --color-primary: #82b01c; /* slightly darker green for better contrast */
            --color-primary-rgb: 130, 176, 28;
            --color-primary-glow: rgba(130, 176, 28, 0.1);
            --color-secondary: #595b60;
            --color-secondary-rgb: 89, 91, 96;
            --color-accent: #658a14;
            
            --color-success-bg: rgba(16, 185, 129, 0.08);
            --color-error-bg: rgba(244, 63, 94, 0.06);
            
            --text-main: #1f2937;
            --text-muted: #6b7280;
            --text-inverse: #ffffff;
            
            --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.15);
            --shadow-md: 0 8px 32px rgba(0, 0, 0, 0.24);
            --shadow-lg: 0 16px 48px rgba(0, 0, 0, 0.35);

            color-scheme: light;
        }

        /* Base Resets & Global Styles */
        * {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        
        body {
            font-family: var(--font-body);
            background-color: var(--bg-base);
            color: var(--text-main);
            min-height: 100vh;
            display: flex;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            overflow-x: hidden;
            position: relative;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            transition: background-color 0.3s ease, color 0.3s ease, border-color 0.3s ease, box-shadow 0.3s ease;
        }

        /* Premium Backdrop Ambient Glows */
        .ambient-glow-1 {
            position: absolute;
            top: 10%;
            left: 15%;
            width: 45vw;
            height: 45vw;
            background: radial-gradient(circle, rgba(var(--color-primary-rgb), 0.08) 0%, rgba(0,0,0,0) 70%);
            border-radius: var(--radius-full);
            z-index: -2;
            pointer-events: none;
            filter: blur(40px);
            animation: pulse-slow 15s infinite alternate;
        }

        .ambient-glow-2 {
            position: absolute;
            bottom: 10%;
            right: 15%;
            width: 40vw;
            height: 40vw;
            background: radial-gradient(circle, rgba(var(--color-secondary-rgb), 0.12) 0%, rgba(0,0,0,0) 75%);
            border-radius: var(--radius-full);
            z-index: -2;
            pointer-events: none;
            filter: blur(50px);
            animation: pulse-slow 12s infinite alternate-reverse;
        }

        @keyframes pulse-slow {
            0% { transform: scale(1) translate(0, 0); }
            100% { transform: scale(1.1) translate(2%, 3%); }
        }

        /* Container Layout */
        .app-container {
            width: 100%;
            max-width: 680px;
            padding: 40px 20px;
            z-index: 1;
        }

        /* Typography & Header styling */
        header {
            text-align: center;
            margin-bottom: 35px;
        }

        .logo-area {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            padding: 12px 24px;
            background: var(--bg-surface-translucent);
            border-radius: var(--radius-md);
            border: 1px solid var(--border-color);
            backdrop-filter: blur(10px);
            -webkit-backdrop-filter: blur(10px);
            box-shadow: var(--shadow-sm);
            margin-bottom: 24px;
            transition: var(--transition-bounce);
            position: relative;
        }

        .logo-area::after {
            content: '';
            position: absolute;
            inset: -4px;
            border-radius: calc(var(--radius-md) + 4px);
            background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
            z-index: -1;
            opacity: 0.25;
            filter: blur(8px);
            transition: var(--transition-smooth);
        }

        .logo-area:hover {
            transform: scale(1.04);
            background: var(--bg-surface-button);
            border-color: rgba(var(--color-primary-rgb), 0.25);
            box-shadow: 0 8px 30px rgba(var(--color-primary-rgb), 0.12);
        }

        .logo-area:hover::after {
            opacity: 0.45;
            filter: blur(12px);
        }

        .logo-area svg {
            height: 42px;
            width: auto;
            display: block;
        }

        h1 {
            font-family: var(--font-display);
            font-size: 2.25rem;
            font-weight: 800;
            letter-spacing: -0.025em;
            background: var(--heading-gradient);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            margin-bottom: 10px;
        }

        .subtitle {
            font-size: 1.05rem;
            color: var(--text-muted);
            font-weight: 400;
            line-height: 1.5;
        }

        /* Glassmorphic Panel Styles */
        .glass-panel {
            background: var(--bg-surface);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-lg);
            padding: 40px;
            transition: var(--transition-smooth);
            position: relative;
            overflow: hidden;
        }

        .glass-panel::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 1px;
            background: linear-gradient(90deg, rgba(255,255,255,0.1) 0%, rgba(255,255,255,0) 100%);
        }

        /* Upload Dropzone View */
        .upload-zone {
            border: 2px dashed var(--border-color);
            border-radius: var(--radius-md);
            padding: 50px 30px;
            text-align: center;
            cursor: pointer;
            transition: var(--transition-bounce);
            background: var(--bg-card);
            position: relative;
        }

        .upload-zone:hover, .upload-zone.dragover {
            border-color: var(--color-primary);
            background: rgba(var(--color-primary-rgb), 0.04);
            transform: scale(1.01);
            box-shadow: 0 0 25px var(--color-primary-glow);
        }

        .upload-icon {
            font-size: 52px;
            color: var(--color-primary);
            margin-bottom: 20px;
            transition: var(--transition-bounce);
            display: inline-block;
        }

        .upload-zone:hover .upload-icon {
            transform: translateY(-8px);
            color: var(--color-secondary);
        }

        .upload-zone h3 {
            font-family: var(--font-display);
            font-size: 1.25rem;
            font-weight: 600;
            margin-bottom: 8px;
        }

        .upload-zone p {
            font-size: 0.875rem;
            color: var(--text-muted);
        }

        .file-limit {
            margin-top: 15px;
            font-size: 0.75rem !important;
            opacity: 0.7;
        }

        /* Hidden standard file input */
        #file-input {
            display: none;
        }

        /* Universal Circular Loading Spinner */
        .loading-container {
            display: flex;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            padding: 30px 0;
            text-align: center;
        }

        .spinner-wrapper {
            position: relative;
            width: 80px;
            height: 80px;
            margin-bottom: 24px;
        }

        .spinner {
            width: 100%;
            height: 100%;
            border: 4px solid rgba(255, 255, 255, 0.03);
            border-top: 4px solid var(--color-primary);
            border-right: 4px solid var(--color-secondary);
            border-radius: 50%;
            animation: spin 1.2s cubic-bezier(0.5, 0.1, 0.4, 0.9) infinite;
        }

        .spinner-glow {
            position: absolute;
            inset: -10px;
            background: radial-gradient(circle, var(--color-primary-glow) 0%, rgba(0,0,0,0) 70%);
            z-index: -1;
            filter: blur(10px);
            opacity: 0.8;
            animation: pulse-light 2s infinite alternate;
        }

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

        @keyframes pulse-light {
            0% { transform: scale(0.9); opacity: 0.5; }
            100% { transform: scale(1.15); opacity: 0.9; }
        }

        .loading-text {
            font-family: var(--font-display);
            font-size: 1.15rem;
            font-weight: 600;
            margin-bottom: 8px;
            color: var(--text-main);
        }

        .loading-subtext {
            font-size: 0.875rem;
            color: var(--text-muted);
        }

        /* Department Checklist View */
        .file-info-header {
            display: flex;
            align-items: center;
            background: rgba(255, 255, 255, 0.02);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            padding: 16px 20px;
            margin-bottom: 25px;
            animation: fadeIn 0.4s ease;
        }

        .file-icon {
            font-size: 28px;
            color: #22c55e;
            margin-right: 16px;
        }

        .file-details {
            flex-grow: 1;
        }

        .file-name {
            font-weight: 600;
            font-size: 0.95rem;
            margin-bottom: 2px;
            white-space: nowrap;
            overflow: hidden;
            text-overflow: ellipsis;
            max-width: 320px;
        }

        .file-meta {
            font-size: 0.775rem;
            color: var(--text-muted);
        }

        .section-header {
            display: flex;
            align-items: center;
            justify-content: space-between;
            margin-bottom: 16px;
        }

        .section-title {
            font-family: var(--font-display);
            font-size: 1.125rem;
            font-weight: 600;
        }

        .selection-toggles {
            display: flex;
            gap: 12px;
        }

        /* Text Buttons (like Select All) */
        .btn-text {
            background: none;
            border: none;
            color: var(--color-primary);
            font-size: 0.825rem;
            font-weight: 600;
            cursor: pointer;
            padding: 4px 8px;
            border-radius: var(--radius-sm);
            transition: var(--transition-smooth);
        }

        .btn-text:hover {
            color: var(--color-secondary);
            background: rgba(var(--color-primary-rgb), 0.08);
        }

        /* Checkbox Container */
        .dept-list {
            max-height: 280px;
            overflow-y: auto;
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            background: var(--bg-list);
            margin-bottom: 30px;
            padding: 8px;
        }

        /* Custom Scrollbar for list */
        .dept-list::-webkit-scrollbar {
            width: 6px;
        }
        
        .dept-list::-webkit-scrollbar-track {
            background: transparent;
        }
        
        .dept-list::-webkit-scrollbar-thumb {
            background: var(--scrollbar-thumb);
            border-radius: var(--radius-full);
        }

        .dept-list::-webkit-scrollbar-thumb:hover {
            background: var(--scrollbar-thumb-hover);
        }

        /* Item Row */
        .dept-item {
            display: flex;
            align-items: center;
            padding: 12px 16px;
            border-radius: var(--radius-sm);
            cursor: pointer;
            transition: var(--transition-smooth);
            user-select: none;
            margin-bottom: 4px;
        }

        .dept-item:last-child {
            margin-bottom: 0;
        }

        .dept-item:hover {
            background: var(--bg-surface-translucent);
        }

        /* Custom Checkbox Design */
        .checkbox-container {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 22px;
            height: 22px;
            border: 2px solid var(--border-input);
            border-radius: 6px;
            margin-right: 14px;
            transition: var(--transition-bounce);
            flex-shrink: 0;
            background: transparent;
        }

        .dept-item.selected .checkbox-container {
            background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
            border-color: transparent;
            box-shadow: 0 2px 8px rgba(var(--color-primary-rgb), 0.3);
            transform: scale(1.05);
        }

        .checkbox-container i {
            font-size: 11px;
            color: var(--text-inverse);
            opacity: 0;
            transform: scale(0.5);
            transition: var(--transition-bounce);
        }

        .dept-item.selected .checkbox-container i {
            opacity: 1;
            transform: scale(1);
        }

        .dept-name {
            font-size: 0.925rem;
            font-weight: 500;
            color: var(--text-main);
            transition: var(--transition-smooth);
        }

        .dept-item.selected .dept-name {
            color: #ffffff;
        }

        /* Actions Footer (Buttons) */
        .actions-group {
            display: flex;
            gap: 16px;
            margin-top: 25px;
        }

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            padding: 14px 28px;
            border-radius: var(--radius-md);
            font-family: var(--font-display);
            font-weight: 600;
            font-size: 0.95rem;
            cursor: pointer;
            border: none;
            transition: var(--transition-bounce);
            text-decoration: none;
            gap: 10px;
        }

        .btn-primary {
            background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-secondary) 100%);
            color: var(--text-inverse);
            flex-grow: 2;
            box-shadow: 0 4px 16px rgba(var(--color-primary-rgb), 0.25);
        }

        .btn-primary:hover:not(:disabled) {
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(var(--color-primary-rgb), 0.4);
            filter: brightness(1.08);
        }

        .btn-primary:active:not(:disabled) {
            transform: translateY(0);
            filter: brightness(0.95);
        }

        .btn-secondary {
            background: var(--bg-surface-button);
            color: var(--text-main);
            border: 1px solid var(--border-color);
            flex-grow: 1;
        }

        .btn-secondary:hover {
            background: var(--bg-surface-button-hover);
            border-color: var(--border-color);
            color: var(--text-main);
        }

        .btn:disabled {
            opacity: 0.5;
            cursor: not-allowed;
            transform: none !important;
            box-shadow: none !important;
        }

        /* Error States Alert Card */
        .alert-card {
            background: var(--color-error-bg);
            border: 1px solid rgba(244, 63, 94, 0.2);
            color: var(--text-main);
            padding: 20px;
            border-radius: var(--radius-md);
            margin-bottom: 25px;
            display: flex;
            align-items: flex-start;
            animation: shake 0.5s ease-in-out;
        }

        .alert-icon {
            font-size: 22px;
            color: var(--color-error);
            margin-right: 16px;
            margin-top: 2px;
        }

        .alert-content h4 {
            font-family: var(--font-display);
            font-weight: 600;
            margin-bottom: 4px;
            color: var(--color-error);
        }

        .alert-content p {
            font-size: 0.875rem;
            line-height: 1.5;
            color: var(--text-main);
        }

        @keyframes shake {
            0%, 100% { transform: translateX(0); }
            20%, 60% { transform: translateX(-6px); }
            40%, 80% { transform: translateX(6px); }
        }

        /* View Control Utility */
        .view-step {
            display: none;
        }

        .view-step.active {
            display: block;
            animation: fadeSlide 0.5s cubic-bezier(0.16, 1, 0.3, 1) forwards;
        }

        @keyframes fadeSlide {
            from {
                opacity: 0;
                transform: translateY(12px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }

        @keyframes fadeIn {
            from { opacity: 0; }
            to { opacity: 1; }
        }

        /* Sokrates Guide Accordion */
        .sokrates-guide {
            margin-top: 25px;
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            overflow: hidden;
            transition: var(--transition-smooth);
        }

        .sokrates-guide[open] {
            background: var(--bg-guide-content);
            border-color: rgba(var(--color-primary-rgb), 0.2);
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.2);
        }

        .guide-summary {
            padding: 16px 20px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            background: var(--bg-guide-header);
            cursor: pointer;
            user-select: none;
            transition: var(--transition-smooth);
        }

        .sokrates-guide[open] .guide-summary {
            background: var(--bg-guide-content);
            border-bottom: 1px solid var(--border-color);
        }

        .guide-summary::-webkit-details-marker {
            display: none;
        }

        .guide-summary:hover {
            background: var(--bg-guide-header);
        }

        .summary-title {
            font-family: var(--font-display);
            font-size: 0.95rem;
            font-weight: 600;
            color: var(--text-main);
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .summary-title i {
            color: var(--color-primary);
            font-size: 1.1rem;
        }

        .summary-chevron {
            font-size: 0.85rem;
            color: var(--text-muted);
            transition: transform 0.3s ease;
            display: inline-block;
        }

        .sokrates-guide[open] .summary-chevron {
            transform: rotate(180deg);
            color: var(--color-secondary);
        }

        .guide-content {
            padding: 24px;
            background: var(--bg-card);
            font-size: 0.9rem;
            line-height: 1.6;
            color: var(--text-main);
            animation: fadeIn 0.4s ease;
        }

        .guide-intro {
            color: var(--text-muted);
            margin: 15px 0;
        }

        .steps-container {
            display: flex;
            flex-direction: column;
            gap: 12px;
            text-align: left;
        }

        .step-card {
            display: flex;
            gap: 15px;
            background: rgba(0, 0, 0, 0.2);
            border: 1px solid rgba(255, 255, 255, 0.03);
            border-radius: var(--radius-sm);
            padding: 12px 16px;
        }

        .step-num {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 24px;
            height: 24px;
            background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
            border-radius: 50%;
            font-size: 0.75rem;
            font-weight: 700;
            color: var(--text-inverse);
            flex-shrink: 0;
            margin-top: 2px;
        }

        .step-desc {
            flex-grow: 1;
            color: var(--text-main);
        }

        .step-desc strong {
            font-weight: 600;
        }

        .step-desc code {
            font-family: monospace;
            background: var(--bg-surface-button-hover);
            padding: 2px 6px;
            border-radius: 4px;
            font-size: 0.8rem;
            color: var(--color-code-text);
        }

        .field-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 6px;
            margin-top: 10px;
        }

        .field-tag {
            background: rgba(var(--color-primary-rgb), 0.1);
            border: 1px solid rgba(var(--color-primary-rgb), 0.2);
            color: var(--color-primary);
            font-family: monospace;
            font-size: 0.775rem;
            padding: 2px 8px;
            border-radius: var(--radius-sm);
            display: inline-block;
        }

        /* Custom Checkbox Options */
        .options-section {
            margin-top: 24px;
            padding: 16px;
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-sm);
            transition: var(--transition-smooth);
        }
        .options-section:hover {
            border-color: var(--border-hover);
            background: var(--bg-surface-translucent);
        }
        .checkbox-option {
            display: flex;
            align-items: flex-start;
            gap: 12px;
            cursor: pointer;
            user-select: none;
            padding: 4px 0;
        }
        .checkbox-option input[type="checkbox"] {
            display: none;
        }
        .checkbox-option .checkbox-visual {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 20px;
            height: 20px;
            border: 2px solid var(--border-input);
            border-radius: 6px;
            flex-shrink: 0;
            background: transparent;
            transition: var(--transition-bounce);
            margin-top: 2px;
        }
        .checkbox-option input[type="checkbox"]:checked + .checkbox-visual {
            background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
            border-color: transparent;
            box-shadow: 0 2px 8px rgba(var(--color-primary-rgb), 0.3);
            transform: scale(1.05);
        }
        .checkbox-option .checkbox-visual i {
            font-size: 10px;
            color: var(--text-inverse);
            opacity: 0;
            transform: scale(0.5);
            transition: var(--transition-bounce);
        }
        .checkbox-option input[type="checkbox"]:checked + .checkbox-visual i {
            opacity: 1;
            transform: scale(1);
        }

        /* Responsive refinements */
        @media (max-width: 580px) {
            .glass-panel {
                padding: 24px;
            }
            
            .actions-group {
                flex-direction: column-reverse;
            }
            
            h1 {
                font-size: 1.8rem;
            }
            
            .app-container {
                padding: 20px 10px;
            }
        }

        /* Footer Info */
        footer {
            margin-top: 30px;
            text-align: center;
            font-size: 0.775rem;
            color: var(--text-muted);
            opacity: 0.6;
        }

        /* Theme Toggle Button */
        .theme-toggle-btn {
            position: absolute;
            top: 24px;
            right: 24px;
            width: 44px;
            height: 44px;
            border-radius: var(--radius-md);
            background: var(--bg-surface);
            border: 1px solid var(--border-color);
            color: var(--text-main);
            cursor: pointer;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.15rem;
            backdrop-filter: blur(10px);
            -webkit-backdrop-filter: blur(10px);
            transition: var(--transition-bounce);
            z-index: 100;
        }

        .theme-toggle-btn:hover {
            transform: scale(1.08) rotate(15deg);
            border-color: var(--color-primary);
            color: var(--color-primary);
            box-shadow: 0 0 15px var(--color-primary-glow);
        }

        .theme-icon-light {
            display: none;
        }

        :root[data-theme="light"] .theme-icon-dark {
            display: none;
        }

        :root[data-theme="light"] .theme-icon-light {
            display: block;
        }

        /* Help Button style */
        .help-btn {
            position: absolute;
            top: 24px;
            right: 80px;
            width: 44px;
            height: 44px;
            border-radius: var(--radius-md);
            background: var(--bg-surface);
            border: 1px solid var(--border-color);
            color: var(--text-main);
            cursor: pointer;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.15rem;
            backdrop-filter: blur(10px);
            -webkit-backdrop-filter: blur(10px);
            transition: var(--transition-bounce);
            z-index: 100;
        }

        .help-btn:hover {
            transform: scale(1.08);
            border-color: var(--color-primary);
            color: var(--color-primary);
            box-shadow: 0 0 15px var(--color-primary-glow);
        }

        /* Modal styling */
        .modal-overlay {
            position: fixed;
            top: 0;
            left: 0;
            width: 100vw;
            height: 100vh;
            background: rgba(10, 15, 30, 0.7);
            backdrop-filter: blur(8px);
            -webkit-backdrop-filter: blur(8px);
            display: flex;
            align-items: center;
            justify-content: center;
            z-index: 1000;
            opacity: 0;
            animation: fadeIn 0.2s forwards ease-out;
        }

        .modal-content {
            background: var(--bg-surface);
            border: 1px solid var(--border-color);
            box-shadow: var(--shadow-xl);
            border-radius: var(--radius-lg);
            width: 90%;
            max-width: 650px;
            max-height: 85vh;
            display: flex;
            flex-direction: column;
            position: relative;
            transform: scale(0.95);
            animation: scaleIn 0.2s forwards cubic-bezier(0.34, 1.56, 0.64, 1);
            overflow: hidden;
        }

        .modal-close-btn {
            position: absolute;
            top: 20px;
            right: 20px;
            width: 32px;
            height: 32px;
            border-radius: 50%;
            background: rgba(128, 128, 128, 0.1);
            border: none;
            color: var(--text-muted);
            cursor: pointer;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.1rem;
            transition: var(--transition-smooth);
        }

        .modal-close-btn:hover {
            background: rgba(239, 68, 68, 0.1);
            color: var(--color-error);
            transform: rotate(90deg);
        }

        .modal-header {
            padding: 30px 30px 20px 30px;
            border-bottom: 1px solid var(--border-color);
        }

        .modal-header h2 {
            font-family: var(--font-display);
            font-size: 1.5rem;
            font-weight: 700;
            color: var(--text-main);
            margin-bottom: 6px;
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .modal-header p {
            font-size: 0.9rem;
            color: var(--text-muted);
            margin: 0;
        }

        .modal-body {
            padding: 30px;
            overflow-y: auto;
            max-height: calc(85vh - 120px);
        }

        /* Animations */
        @keyframes fadeIn {
            to { opacity: 1; }
        }

        @keyframes scaleIn {
            to { transform: scale(1); }
        }

        /* Responsive adjustments */
        @media (max-width: 600px) {
            .help-btn {
                top: 16px;
                right: 70px;
                width: 38px;
                height: 38px;
                font-size: 1rem;
            }
            .theme-toggle-btn {
                top: 16px;
                right: 16px;
                width: 38px;
                height: 38px;
                font-size: 1rem;
            }
            .modal-content {
                width: 95%;
                max-height: 90vh;
            }
            .modal-header, .modal-body {
                padding: 20px;
            }
        }