.skip-link {
            position: absolute;
            top: -40px;
            left: 6px;
            background: #000;
            color: #fff;
            padding: 8px;
            text-decoration: none;
            z-index: 10000;
        }
        .skip-link:focus {
            top: 6px;
        }

        .accessibility-button {
            position: fixed;
            left: 1rem;
            top: 95%;
            transform: translateY(-50%);
            background: #2563eb;
            color: #ffffff;
            border: none;
            border-radius: 50%;
            width: 60px;
            height: 60px;
            font-size: 18px;
            font-weight: bold;
            cursor: pointer;
            z-index: 9998;
            box-shadow: 0 4px 12px rgba(37, 99, 235, 0.4);
            transition: all 0.3s ease;
        }
        .accessibility-button:hover {
            background: #1d4ed8;
            transform: translateY(-50%) scale(1.1);
            box-shadow: 0 6px 20px rgba(37, 99, 235, 0.6);
        }

        .accessibility-popup {
            position: fixed;
            left: 50%;
            top: 50%;
            transform: translate(-50%, -50%);
            background: #ffffff;
            padding: 0;
            border: none;
            border-radius: 16px;
            z-index: 9999;
            width: 90vw;
            max-width: 900px;
            max-height: 85vh;
            overflow-y: auto;
            font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
            box-shadow: 0 20px 60px rgba(0,0,0,0.15);
        }

        .popup-header {
            background: linear-gradient(135deg, #2563eb 0%, #1d4ed8 100%);
            color: white;
            padding: 1.5rem 2rem;
            border-radius: 16px 16px 0 0;
            text-align: center;
            position: relative;
        }

        .popup-header h2 {
            margin: 0;
            font-size: 1.5rem;
            font-weight: 600;
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 0.5rem;
        }

        .close-btn {
            position: absolute;
            right: 1rem;
            top: 50%;
            transform: translateY(-50%);
            background: rgba(255,255,255,0.2);
            border: none;
            color: white;
            width: 32px;
            height: 32px;
            border-radius: 50%;
            cursor: pointer;
            transition: background 0.2s;
        }
        .close-btn:hover {
            background: rgba(255,255,255,0.3);
        }

        .popup-content {
            padding: 2rem;
        }

        .categories-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 1.5rem;
            margin-bottom: 2rem;
        }

        .category-card {
            background: #f8fafc;
            border: 1px solid #e2e8f0;
            border-radius: 12px;
            padding: 1.5rem;
            transition: all 0.2s ease;
        }
        .category-card:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 25px rgba(0,0,0,0.1);
            border-color: #cbd5e1;
        }

        .category-header {
            display: flex;
            align-items: center;
            gap: 0.75rem;
            margin-bottom: 1.25rem;
            padding-bottom: 0.75rem;
            border-bottom: 2px solid #e2e8f0;
        }

        .category-icon {
            width: 40px;
            height: 40px;
            border-radius: 10px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 18px;
            color: white;
        }

        .category-icon.schrift { background: linear-gradient(135deg, #3b82f6, #1d4ed8); }
        .category-icon.design { background: linear-gradient(135deg, #8b5cf6, #7c3aed); }
        .category-icon.layout { background: linear-gradient(135deg, #10b981, #059669); }
        .category-icon.lesen { background: linear-gradient(135deg, #f59e0b, #d97706); }

        .category-title {
            font-size: 1.1rem;
            font-weight: 600;
            color: #1e293b;
            margin: 0;
        }

        .access-group {
            margin-bottom: 1rem;
        }
        .access-group:last-child {
            margin-bottom: 0;
        }

        .access-group label {
            display: block;
            font-weight: 500;
            margin-bottom: 0.5rem;
            color: #374151;
            font-size: 0.9rem;
        }

        .access-group select {
            width: 100%;
            padding: 0.75rem;
            border: 1px solid #d1d5db;
            border-radius: 8px;
            font-size: 0.9rem;
            background: white;
            transition: all 0.2s ease;
        }
        .access-group select:focus {
            outline: none;
            border-color: #2563eb;
            box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
        }

        .popup-actions {
            display: flex;
            gap: 1rem;
            margin-top: 0;
            padding-top: 2rem;
            border-top: 1px solid #e5e7eb;
            justify-content: center;
        }

        .popup-actions button {
            padding: 0.875rem 1.5rem;
            border: none;
            border-radius: 8px;
            cursor: pointer;
            font-weight: 600;
            font-size: 0.9rem;
            transition: all 0.2s ease;
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }

        .btn-apply {
            background: #10b981;
            color: white;
        }
        .btn-apply:hover {
            background: #059669;
            transform: translateY(-1px);
        }

        .btn-reset {
            background: #ef4444;
            color: white;
        }
        .btn-reset:hover {
            background: #dc2626;
            transform: translateY(-1px);
        }

        .btn-close {
            background: #6b7280;
            color: white;
        }
        .btn-close:hover {
            background: #4b5563;
            transform: translateY(-1px);
        }

        .hidden {
            display: none;
        }

        .popup-backdrop {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: rgba(0, 0, 0, 0.5);
            z-index: 9998;
            opacity: 0;
            transition: opacity 0.3s ease;
        }
        .popup-backdrop.visible {
            opacity: 1;
        }

        .demo-content {
            max-width: 800px;
            margin: 2rem auto;
            padding: 2rem;
            font-family: Georgia, serif;
            line-height: 1.5;
        }

        .demo-content h1 {
            color: #1f2937;
            margin-bottom: 1rem;
        }

        .demo-content p {
            margin-bottom: 1rem;
            text-align: justify;
        }

        .demo-content a {
            color: #2563eb;
            text-decoration: none;
        }

        .demo-content img {
            max-width: 100%;
            height: auto;
            margin: 1rem 0;
            border-radius: 8px;
        }

        @media (max-width: 768px) {
            .accessibility-popup {
                width: 95vw;
                max-height: 90vh;
            }
            .popup-content {
                padding: 1.5rem;
            }
            .categories-grid {
                grid-template-columns: 1fr;
                gap: 1rem;
            }
            .popup-actions {
                flex-direction: column;
                gap: 0.75rem;
            }
            .popup-actions button {
                width: 100%;
                justify-content: center;
            }
        }

        body.access-textSize-large { font-size: 120%; }
        body.access-textSize-xlarge { font-size: 150%; }
        body.access-textSize-xxlarge { font-size: 180%; }

        body.access-cursor-large * {
            cursor: url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" width="32" height="32" viewBox="0 0 32 32"><path d="M2 2l7 18 4-7 7-4z" fill="black"/></svg>') 2 2, auto !important;
        }
        body.access-cursor-xl * {
            cursor: url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" width="48" height="48" viewBox="0 0 48 48"><path d="M3 3l10 27 6-10 10-6z" fill="black"/></svg>') 3 3, auto !important;
        }

        body.access-letterSpacing-wide * { letter-spacing: 0.05em !important; }
        body.access-letterSpacing-xwide * { letter-spacing: 0.1em !important; }
        body.access-letterSpacing-xxwide * { letter-spacing: 0.15em !important; }

        body.access-font-readable * { font-family: Arial, 'Helvetica Neue', sans-serif !important; }
        body.access-font-dyslexia * { font-family: 'Comic Sans MS', 'Arial', sans-serif !important; }

        body.access-textAlign-left * { text-align: left !important; }
        body.access-textAlign-justify * { text-align: justify !important; }
        body.access-textAlign-center * { text-align: center !important; }

        body.access-lineHeight-large * { line-height: 1.6 !important; }
        body.access-lineHeight-xlarge * { line-height: 2 !important; }
        body.access-lineHeight-xxlarge * { line-height: 2.5 !important; }

        body.access-colorMode-grayscale { filter: grayscale(100%); }
        body.access-colorMode-inverted { filter: invert(100%); }
        body.access-colorMode-sepia { filter: sepia(100%); }

        body.access-brightness-low { filter: brightness(0.7); }
        body.access-brightness-high { filter: brightness(1.3); }

        body.access-highlightLinks-underline a {
            text-decoration: underline !important;
            text-decoration-thickness: 2px !important;
        }
        body.access-highlightLinks-highlight a {
            background: #fef08a !important;
            color: #000 !important;
            padding: 2px 4px !important;
            border-radius: 3px !important;
        }
        body.access-highlightLinks-bold a {
            font-weight: bold !important;
            border: 2px solid #2563eb !important;
            padding: 2px 4px !important;
        }

        body.access-animations-reduced *,
        body.access-animations-reduced *:before,
        body.access-animations-reduced *:after {
            animation-duration: 0.01ms !important;
            animation-iteration-count: 1 !important;
            transition-duration: 0.01ms !important;
        }
        body.access-animations-off *,
        body.access-animations-off *:before,
        body.access-animations-off *:after {
            animation: none !important;
            transition: none !important;
        }

        body.access-images-low img { opacity: 0.3 !important; }
        body.access-images-hide img { display: none !important; }
        body.access-images-blur img { filter: blur(3px) !important; }

        body.access-readingMask-on { position: relative; }
        body.access-readingMask-on::before {
            content: '';
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: linear-gradient(
                to bottom,
                rgba(0,0,0,0.8) 0%,
                rgba(0,0,0,0.8) 40%,
                transparent 45%,
                transparent 55%,
                rgba(0,0,0,0.8) 60%,
                rgba(0,0,0,0.8) 100%
            );
            pointer-events: none;
            z-index: 1000;
        }

        .reading-line {
            position: fixed;
            left: 0;
            right: 0;
            height: 2px;
            background: #ef4444;
            z-index: 1001;
            pointer-events: none;
            box-shadow: 0 0 10px rgba(239, 68, 68, 0.5);
            display: none;
        }
        body.access-readingLine-on .reading-line { display: block; }

        body.access-highlightAll-on * {
            background: rgba(255, 255, 0, 0.2) !important;
            border: 1px solid rgba(255, 255, 0, 0.5) !important;
        }
        body.access-highlightAll-on h1,
        body.access-highlightAll-on h2,
        body.access-highlightAll-on h3,
        body.access-highlightAll-on h4,
        body.access-highlightAll-on h5,
        body.access-highlightAll-on h6 {
            background: rgba(0, 255, 0, 0.3) !important;
        }
        body.access-highlightAll-on p {
            background: rgba(0, 0, 255, 0.1) !important;
        }