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

        :root {
            --bg-primary: #ffffff;
            --bg-secondary: #f5f5f7;
            --text-primary: #1d1d1f;
            --text-secondary: #86868b;
            --accent: #007aff;
            --border: #d2d2d7;
            --shadow: rgba(0, 0, 0, 0.1);
        }

        @media (prefers-color-scheme: dark) {
            :root {
                --bg-primary: #000000;
                --bg-secondary: #1c1c1e;
                --text-primary: #f5f5f7;
                --text-secondary: #8e8e93;
                --accent: #0a84ff;
                --border: #38383a;
                --shadow: rgba(255, 255, 255, 0.1);
            }
        }

        body {
            font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
            background-color: var(--bg-primary);
            color: var(--text-primary);
            line-height: 1.6;
            scroll-behavior: smooth;
            transition: all 0.3s ease;
        }

        .container {
            max-width: 800px;
            margin: 0 auto;
            padding: 0 20px;
        }

        /* Navigation */
        nav {
            position: fixed;
            top: 0;
            width: 100%;
            background: rgba(255, 255, 255, 0.8);
            backdrop-filter: blur(20px);
            border-bottom: 1px solid var(--border);
            z-index: 1000;
            transition: all 0.3s ease;
        }

        @media (prefers-color-scheme: dark) {
            nav {
                background: rgba(0, 0, 0, 0.8);
            }
        }

        nav .container {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 15px 20px;
        }

        .logo {
            font-weight: 600;
            font-size: 1.2rem;
            color: var(--text-primary);
            text-decoration: none;
        }

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

        .nav-links a {
            color: var(--text-secondary);
            text-decoration: none;
            font-weight: 400;
            transition: color 0.3s ease;
        }

        .nav-links a:hover {
            color: var(--accent);
        }

        /* Intro Section */
        .intro {
            padding: 120px 0 80px;
            text-align: center;
        }

        .profile-image {
            width: 150px;
            height: 150px;
            border-radius: 50%;
            object-fit: cover;
            margin: 0 auto 30px;
            display: block;
            border: 3px solid var(--border);
            transition: transform 0.3s ease;
        }

        .profile-image:hover {
            transform: scale(1.05);
        }

        .intro h1 {
            font-size: 3rem;
            font-weight: 700;
            margin-bottom: 20px;
            background: linear-gradient(135deg, var(--text-primary), var(--accent));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .intro p {
            font-size: 1.3rem;
            color: var(--text-secondary);
            max-width: 600px;
            margin: 0 auto;
        }

        /* About Section */
        .about {
            padding: 80px 0;
            background: var(--bg-secondary);
        }

        .section-title {
            font-size: 2.5rem;
            font-weight: 600;
            text-align: center;
            margin-bottom: 50px;
            color: var(--text-primary);
        }

        .about-content {
            text-align: center;
            max-width: 700px;
            margin: 0 auto;
        }

        .about-intro {
            font-size: 1.4rem;
            color: var(--text-primary);
            font-weight: 300;
            margin-bottom: 60px;
            line-height: 1.6;
        }

        .experience-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 40px;
            margin-bottom: 60px;
        }

        .experience-card {
            background: var(--bg-primary);
            padding: 30px;
            border-radius: 16px;
            border: 1px solid var(--border);
            transition: all 0.3s ease;
            position: relative;
            overflow: hidden;
        }

        .experience-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 3px;
            background: linear-gradient(90deg, var(--accent), #34c759);
            transform: scaleX(0);
            transition: transform 0.3s ease;
        }

        .experience-card:hover::before {
            transform: scaleX(1);
        }

        .experience-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 20px 40px var(--shadow);
        }

        .experience-card h3 {
            color: var(--text-primary);
            font-size: 1.3rem;
            margin-bottom: 10px;
            font-weight: 600;
        }

        .experience-card .role {
            color: var(--accent);
            font-size: 0.95rem;
            font-weight: 500;
            margin-bottom: 15px;
        }

        .experience-card p {
            color: var(--text-secondary);
            font-size: 0.95rem;
            line-height: 1.6;
        }

        .skills-section {
            margin-top: 40px;
        }

        .skills-title {
            color: var(--text-primary);
            font-size: 1.2rem;
            font-weight: 600;
            margin-bottom: 25px;
        }

        .skills-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(170px, 1fr));
            gap: 15px;
        }

        .skill-item {
            background: var(--bg-primary);
            border: 1px solid var(--border);
            padding: 20px 15px;
            border-radius: 12px;
            text-align: center;
            transition: all 0.3s ease;
            position: relative;
        }

        .skill-item:hover {
            transform: translateY(-3px);
            border-color: var(--accent);
            box-shadow: 0 8px 25px var(--shadow);
        }

        .skill-item .skill-icon {
            font-size: 1.5rem;
            margin-bottom: 8px;
            display: block;
        }

        .skill-item .skill-name {
            color: var(--text-primary);
            font-size: 0.9rem;
            font-weight: 500;
        }

        /* Social Links */
        .social-links {
            display: flex;
            justify-content: center;
            gap: 20px;
            margin-top: 40px;
        }

        .social-link {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 50px;
            height: 50px;
            background: var(--bg-secondary);
            border-radius: 50%;
            color: var(--text-secondary);
            text-decoration: none;
            transition: all 0.3s ease;
            border: 1px solid var(--border);
        }

        .social-link:hover {
            background: var(--accent);
            color: white;
            transform: translateY(-3px);
            box-shadow: 0 10px 30px var(--shadow);
        }

        /* Impressum */
        .impressum {
            padding: 80px 0;
            background: var(--bg-primary);
        }

        .impressum-content {
            max-width: 600px;
            margin: 0 auto;
        }

        .impressum h3 {
            color: var(--text-primary);
            margin-bottom: 15px;
            font-size: 1.2rem;
        }

        .impressum p {
            color: var(--text-secondary);
            margin-bottom: 20px;
            font-size: 0.95rem;
        }

        /* Footer */
        footer {
            background: var(--bg-secondary);
            padding: 40px 0;
            text-align: center;
            border-top: 1px solid var(--border);
        }

        footer p {
            color: var(--text-secondary);
            font-size: 0.9rem;
        }

        /* Responsive Design */
        @media (max-width: 768px) {
            .nav-links {
                display: none;
            }

            .intro h1 {
                font-size: 2.5rem;
            }

            .intro p {
                font-size: 1.1rem;
                padding: 0 20px;
            }

            .experience-grid {
                grid-template-columns: 1fr;
                gap: 25px;
            }

            .skills-grid {
                grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
                gap: 12px;
            }

            .section-title {
                font-size: 2rem;
            }

            .social-links {
                gap: 15px;
            }

            .about-intro {
                font-size: 1.2rem;
                margin-bottom: 40px;
            }
        }

        /* Smooth animations */
        .fade-in {
            opacity: 0;
            transform: translateY(30px);
            animation: fadeInUp 0.8s ease forwards;
        }

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

        .intro > * {
            animation-delay: 0.2s;
        }

        .about-content > * {
            animation-delay: 0.4s;
        }