* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            line-height: 1.6;
            background: #14213d;
            color: #e5e5e5;
            overflow-x: hidden;
        }

        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }

        /* Header */
        header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            background: #14213d;
            backdrop-filter: blur(10px);
            z-index: 1000;
            padding: 15px 0;
            transition: all 0.3s ease;
        }

        nav {
            display: flex;
            justify-content: space-between;
            align-items: center;
        }

        .logo {
            font-size: 24px;
            font-weight: bold;
            background: linear-gradient(45deg, #fbfeff, #fca311);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            background-size: 200% 200%;
            animation: logoGradient 3s ease-in-out infinite;
        }

        .nav-links {
            display: flex;
            list-style: none;
            gap: 30px;
        }

        @keyframes logoGradient {
            0% {
                background-position: 0% 50%;
            }

            50% {
                background-position: 100% 50%;
            }

            100% {
                background-position: 0% 50%;
            }
        }

        .nav-links a {
            color: #e5e5e5;
            text-decoration: none;
            transition: color 0.3s ease;
            position: relative;
        }

        .nav-links a:hover {
            color: #fca311;
        }

        .nav-links a::after {
            content: '';
            position: absolute;
            bottom: -5px;
            left: 0;
            width: 0;
            height: 2px;
            background: #fca311;
            transition: width 0.3s ease;
        }

        .nav-links a:hover::after {
            width: 100%;
        }

        /* Language Switcher */
        .lang-switcher {
            display: flex;
            gap: 10px;
            margin-left: 20px;
            align-items: center;
        }

        .lang-btn {
            background: none;
            border: 1px solid rgba(255, 255, 255, 0.2);
            color: #a0a9c0;
            cursor: pointer;
            padding: 5px 10px;
            border-radius: 4px;
            font-size: 0.9rem;
            transition: all 0.3s ease;
        }

        .lang-btn:hover,
        .lang-btn.active {
            color: #fca311;
            border-color: #fca311;
        }

        /* Mobile Menu Styles */
        .hamburger {
            display: none;
            cursor: pointer;
        }

        .hamburger div {
            width: 25px;
            height: 3px;
            background-color: #e5e5e5;
            margin: 5px;
            transition: all 0.3s ease;
        }

        @media screen and (max-width: 768px) {
            body {
                overflow-x: hidden;
            }

            .nav-links {
                position: absolute;
                right: 0px;
                height: 92vh;
                top: 8vh;
                background-color: #14213d;
                display: flex;
                flex-direction: column;
                align-items: center;
                width: 50%;
                transform: translateX(100%);
                transition: transform 0.5s ease-in;
                z-index: 999;
                padding-top: 60px;
                box-shadow: -2px 0 10px rgba(0, 0, 0, 0.5);
            }

            .nav-links li {
                opacity: 0;
            }

            .hamburger {
                display: block;
            }
        }

        .nav-active {
            transform: translateX(0%);
        }

        @keyframes navLinkFade {
            from {
                opacity: 0;
                transform: translateX(50px);
            }

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

        .toggle .line1 {
            transform: rotate(-45deg) translate(-5px, 6px);
        }

        .toggle .line2 {
            opacity: 0;
        }

        .toggle .line3 {
            transform: rotate(45deg) translate(-5px, -6px);
        }

        .hero {
            min-height: 100vh;
            display: flex;
            align-items: center;
            background: linear-gradient(135deg, #000000 0%, #14213d 100%);
            position: relative;
            overflow: hidden;
        }

        .hero::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><defs><pattern id="grid" width="10" height="10" patternUnits="userSpaceOnUse"><path d="M 10 0 L 0 0 0 10" fill="none" stroke="%23ffffff" stroke-width="0.1" opacity="0.1"/></pattern></defs><rect width="100" height="100" fill="url(%23grid)"/></svg>');
            opacity: 0.3;
        }

        .hero-content {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 60px;
            align-items: center;
            position: relative;
            z-index: 2;
        }

        .hero-text h1 {
            font-size: 3.5rem;
            font-weight: 700;
            margin-bottom: 20px;
            background: linear-gradient(45deg, #e5e5e5, #fca311);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            animation: fadeInUp 1s ease;
        }

        .hero-text .subtitle {
            font-size: 1.3rem;
            color: #a0a9c0;
            margin-bottom: 30px;
            animation: fadeInUp 1s ease 0.2s both;
        }

        .hero-text p {
            font-size: 1.1rem;
            color: #8892b0;
            margin-bottom: 40px;
            animation: fadeInUp 1s ease 0.4s both;
        }

        .cta-buttons {
            display: flex;
            gap: 20px;
            animation: fadeInUp 1s ease 0.6s both;
        }

        .btn {
            padding: 15px 30px;
            border: none;
            border-radius: 50px;
            font-size: 1rem;
            font-weight: 600;
            cursor: pointer;
            transition: all 0.3s ease;
            text-decoration: none;
            display: inline-block;
            position: relative;
            overflow: hidden;
        }

        .btn-primary {
            background: linear-gradient(45deg, #fca311, #e5e5e5);
            color: white;
        }

        .btn-primary:hover {
            transform: translateY(-2px);
            box-shadow: 0 10px 30px #fca311;
        }

        .btn-secondary {
            background: transparent;
            color: #fca311;
            border: 2px solid #fca311;
        }

        .btn-secondary:hover {
            background: #fca311;
            color: white;
            transform: translateY(-1px);
            box-shadow: 2px 2px 50px 1px #fca311;
        }

        /* Back to top button */
        .back-to-top {
            position: fixed;
            bottom: 30px;
            right: 30px;
            width: 52px;
            height: 52px;
            border-radius: 50%;
            border: none;
            background: #fca311;
            color: #fff;
            font-size: 1.5rem;
            display: flex;
            align-items: center;
            justify-content: center;
            cursor: pointer;
            box-shadow: 0 12px 30px rgba(0, 168, 255, 0.35);
            opacity: 0;
            visibility: hidden;
            transform: translateY(20px);
            transition: opacity 0.3s ease, transform 0.3s ease, visibility 0.3s ease;
            z-index: 1200;
        }

        .back-to-top:hover {
            box-shadow: 0 16px 35px rgba(0, 168, 255, 0.45);
            transform: translateY(-4px);
        }

        .back-to-top:focus {
            outline: 3px solid rgba(0, 168, 255, 0.4);
            outline-offset: 4px;
        }

        .back-to-top.show {
            opacity: 1;
            visibility: visible;
            transform: translateY(0);
        }

        .hero-visual {
            display: flex;
            justify-content: center;
            align-items: center;
            position: relative;
        }

        .sf-logo {
            width: 300px;
            height: 300px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            position: relative;
            overflow: hidden;
            box-shadow: 0 20px 40px rgba(0, 168, 255, 0.3);
        }

        .sf-logo img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            border-radius: 50%;
        }

        .sf-logo::before {
            content: '';
            position: absolute;
            top: -20px;
            left: -20px;
            right: -20px;
            bottom: -20px;
            border: 2px solid rgba(0, 168, 255, 0.3);
            border-radius: 50%;
            animation: rotate 20s linear infinite;
        }

        /* Services Section */
        .services {
            padding: 100px 0;
            background: #111828;
        }

        .section-title {
            text-align: center;
            font-size: 2.5rem;
            margin-bottom: 60px;
            background: linear-gradient(45deg, #e5e5e5, #fca311);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .services-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 30px;
        }

        .service-card {
            background: linear-gradient(135deg, #1a1f3a, #242b4a);
            padding: 40px;
            border-radius: 20px;
            transition: all 0.3s ease;
            border: 1px solid rgba(0, 168, 255, 0.1);
            position: relative;
            overflow: hidden;
        }

        .service-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 3px;
            background: linear-gradient(45deg, #fca311, #e5e5e5);
        }

        .service-card:hover {
            transform: translateY(-10px);
            box-shadow: 0 20px 40px rgba(0, 168, 255, 0.1);
        }

        .service-icon {
            font-size: 3rem;
            margin-bottom: 20px;
            color: #fca311;
            text-align: center;
        }

        .service-card h3 {
            font-size: 1.5rem;
            margin-bottom: 15px;
            color: #e5e5e5;
            text-align: center;
        }

        .service-card p {
            color: #8892b0;
            line-height: 1.6;
        }

        /* Projects Section */
        .projects {
            padding: 100px 0;
            background: #0d1b2a;
        }

        .projects-intro {
            text-align: center;
            max-width: 720px;
            margin: 0 auto 50px auto;
            color: #c9d6f0;
            line-height: 1.7;
        }

        .projects-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 30px;
        }

        .project-card {
            background: linear-gradient(135deg, rgba(20, 33, 61, 0.85), rgba(12, 21, 40, 0.95));
            border: 1px solid rgba(252, 163, 17, 0.25);
            border-radius: 20px;
            padding: 30px;
            display: flex;
            flex-direction: column;
            gap: 18px;
            transition: transform 0.3s ease, box-shadow 0.3s ease;
            position: relative;
            overflow: hidden;
        }

        .project-card::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(145deg, rgba(252, 163, 17, 0.12), transparent 60%);
            opacity: 0;
            transition: opacity 0.3s ease;
        }

        .project-card:hover {
            transform: translateY(-8px);
            box-shadow: 0 20px 35px rgba(12, 21, 40, 0.5);
        }

        .project-card:hover::before {
            opacity: 1;
        }

        .project-icon {
            font-size: 2.2rem;
            width: 60px;
            height: 60px;
            border-radius: 50%;
            background: rgba(252, 163, 17, 0.12);
            color: #fca311;
            display: grid;
            place-items: center;
            margin: 0 auto;
        }

        .project-card h3 {
            font-size: 1.4rem;
            color: #e5e5e5;
            text-align: center;
        }

        .project-card p {
            color: #aeb7d4;
            line-height: 1.6;
        }

        .project-highlights {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 10px;
            margin: 0;
            color: #d7e1ff;
            padding-left: 0;
        }

        .project-highlights li {
            position: relative;
            padding-left: 26px;
        }

        .project-highlights li::before {
            content: '▹';
            position: absolute;
            left: 0;
            color: #fca311;
        }

        /* Skills Section */
        .skills {
            padding: 100px 0;
            background: #0a0f1c;
        }

        .skills-content {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 60px;
            align-items: center;
        }

        .skills-text h2 {
            font-size: 2.5rem;
            margin-bottom: 30px;
            background: linear-gradient(45deg, #e5e5e5, #fca311);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .skills-text p {
            color: #8892b0;
            font-size: 1.1rem;
            margin-bottom: 30px;
        }

        .skills-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 20px;
        }

        .skill-item {
            background: linear-gradient(135deg, #1a1f3a, #242b4a);
            padding: 20px;
            border-radius: 15px;
            text-align: center;
            transition: all 0.3s ease;
            border: 1px solid rgba(0, 168, 255, 0.1);
            cursor: pointer;
        }

        .skill-item:hover {
            transform: scale(1.05);
            border-color: #fca311;
        }

        .skill-item h4 {
            color: #e5e5e5;
            font-size: 1rem;
            margin-bottom: 10px;
        }

        .skill-bar {
            background: rgba(0, 168, 255, 0.1);
            height: 8px;
            border-radius: 4px;
            overflow: hidden;
        }

        .skill-progress {
            height: 100%;
            background: linear-gradient(45deg, #fca311, #e5e5e5);
            border-radius: 4px;
            animation: fillBar 2s ease-in-out;
        }

        .skill-description {
            opacity: 0;
            visibility: hidden;
            max-height: 0;
            transition: opacity 0.3s ease, max-height 0.3s ease, visibility 0.3s ease;
            overflow: hidden;
            margin-top: 10px;
            color: #cbd5f5;
        }

        .skill-item.is-open .skill-description {
            opacity: 1;
            visibility: visible;
            max-height: 200px;
        }

        @media (hover: hover) {
            .skill-item:hover .skill-description {
                opacity: 1;
                visibility: visible;
                max-height: 200px;
                /* groß genug für deinen Text */
            }
        }

        /* Contact Section */
        .contact {
            padding: 100px 0;
            background: #111828;
        }

        .contact-content {
            text-align: center;
            max-width: 600px;
            margin: 0 auto;
        }

        .contact h2 {
            font-size: 2.5rem;
            margin-bottom: 30px;
            background: linear-gradient(45deg, #e5e5e5, #fca311);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .contact p {
            color: #8892b0;
            font-size: 1.1rem;
            margin-bottom: 40px;
        }

        .contact-info {
            display: flex;
            justify-content: center;
            gap: 40px;
            margin-bottom: 40px;
        }

        .contact-item {
            display: flex;
            align-items: center;
            gap: 10px;
            color: #fca311;
            text-decoration: none;
            transition: color 0.3s ease;
        }

        .contact-item:hover {
            color: #e5e5e5;
        }

        /* Carousel */
        .carousel-section {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 2rem;
        }

        .section-header {
            text-align: center;
            margin-bottom: 3rem;
            color: white;
        }

        .section-subtitle {
            font-size: 1.2rem;
            opacity: 0.9;
            max-width: 600px;
            margin: 0 auto;
            line-height: 1.6;
        }

        .carousel-container {
            position: relative;
            background: rgba(255, 255, 255, 0.1);
            backdrop-filter: blur(10px);
            border-radius: 20px;
            padding: 2rem;
            box-shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
            border: 1px solid rgba(255, 255, 255, 0.2);
        }

        .carousel-wrapper {
            overflow: hidden;
            border-radius: 15px;
        }

        .carousel-track {
            display: flex;
            transition: transform 0.5s cubic-bezier(0.4, 0, 0.2, 1);
        }

        .addon-card {
            min-width: 300px;
            margin: 0 1rem;
            background: white;
            border-radius: 15px;
            padding: 2rem;
            box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
            transform: scale(0.95);
            transition: all 0.3s ease;
            position: relative;
            overflow: hidden;
        }

        .addon-card.active {
            transform: scale(1);
            box-shadow: 0 20px 40px rgba(0, 0, 0, 0.2);
        }

        .addon-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 4px;
            background: linear-gradient(90deg, #00d4ff, #5b63d3);
        }

        .addon-logo {
            width: 60px;
            height: 60px;
            background: linear-gradient(135deg, #667eea, #764ba2);
            border-radius: 12px;
            display: flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 1.5rem;
            position: relative;
        }

        .addon-logo::after {
            content: attr(data-initial);
            color: white;
            font-weight: bold;
            font-size: 1.5rem;
        }

        .addon-title {
            font-size: 1.4rem;
            font-weight: 700;
            color: #2c3e50;
            margin-bottom: 0.5rem;
        }

        .addon-category {
            color: #7f8c8d;
            font-size: 0.9rem;
            margin-bottom: 1rem;
            text-transform: uppercase;
            letter-spacing: 1px;
        }

        .addon-description {
            color: #5a6c7d;
            line-height: 1.6;
            margin-bottom: 1.5rem;
        }

        .addon-features {
            list-style: none;
            margin-bottom: 1.5rem;
        }

        .addon-features li {
            padding: 0.3rem 0;
            color: #34495e;
            display: flex;
            align-items: center;
        }

        .addon-features li::before {
            content: '✓';
            color: #27ae60;
            font-weight: bold;
            margin-right: 0.5rem;
        }

        .addon-cta {
            background: linear-gradient(135deg, #667eea, #764ba2);
            color: white;
            border: none;
            padding: 0.8rem 1.5rem;
            border-radius: 8px;
            font-weight: 600;
            cursor: pointer;
            transition: all 0.3s ease;
            width: 100%;
        }

        .addon-cta:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 20px rgba(102, 126, 234, 0.4);
        }

        .carousel-controls {
            display: flex;
            justify-content: center;
            align-items: center;
            margin-top: 2rem;
            gap: 1rem;
        }

        .carousel-btn {
            background: rgba(255, 255, 255, 0.2);
            border: 2px solid rgba(255, 255, 255, 0.3);
            color: white;
            width: 50px;
            height: 50px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            cursor: pointer;
            transition: all 0.3s ease;
            backdrop-filter: blur(10px);
        }

        .carousel-btn:hover {
            background: rgba(255, 255, 255, 0.3);
            transform: scale(1.1);
        }

        .carousel-btn:disabled {
            opacity: 0.5;
            cursor: not-allowed;
            transform: scale(1);
        }

        .carousel-indicators {
            display: flex;
            gap: 0.5rem;
        }

        .indicator {
            width: 12px;
            height: 12px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.4);
            cursor: pointer;
            transition: all 0.3s ease;
        }

        .indicator.active {
            background: white;
            transform: scale(1.2);
        }

        @media (max-width: 768px) {
            .section-title {
                font-size: 2rem;
            }

            .addon-card {
                min-width: 280px;
                margin: 0 0.5rem;
                padding: 1.5rem;
            }

            .carousel-container {
                padding: 1rem;
            }
        }


        footer {
            padding: 40px 0;
            text-align: center;
            border-top: 1px solid rgba(0, 168, 255, 0.1);
            background: #0a0f1c;
        }

        footer p {
            color: #8892b0;
        }

        /* Animations */
        @keyframes fadeInUp {
            from {
                opacity: 0;
                transform: translateY(30px);
            }

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

        @keyframes float {

            0%,
            100% {
                transform: translateY(0);
            }

            50% {
                transform: translateY(-20px);
            }
        }

        @keyframes rotate {
            from {
                transform: rotate(0deg);
            }

            to {
                transform: rotate(360deg);
            }
        }

        @keyframes fillBar {
            from {
                width: 0;
            }
        }

        /* Mobile Responsive */
        @media (max-width: 768px) {
            .hero-content {
                grid-template-columns: 1fr;
                text-align: center;
            }

            .hero-text h1 {
                font-size: 2.5rem;
            }

            .sf-logo {
                width: 200px;
                height: 200px;
                font-size: 3rem;
            }

            .skills-content {
                grid-template-columns: 1fr;
            }

            .contact-info {
                flex-direction: column;
                gap: 20px;
            }

            .cta-buttons {
                flex-direction: column;
                align-items: center;
            }
        }