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

        body {
            background: linear-gradient(135deg, #0a0a0a 0%, #1a1a2e 50%, #16213e 100%);
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            color: #ffffff;
            min-height: 100vh;
            overflow-x: hidden;
        }

        .container {
            display: flex;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            min-height: 100vh;
            padding: 15px;
            position: relative;
        }

        .card-container {
            perspective: 1200px;
            position: relative;
        }

        .business-card {
            width: 450px;
            height: 280px;
            position: relative;
            transform-style: preserve-3d;
            transition: transform 0.8s ease-in-out;
            transform: rotateY(0deg);
        }

        .business-card.flipped {
            transform: rotateY(180deg);
        }

        .card-face {
            position: absolute;
            width: 100%;
            height: 100%;
            -webkit-backface-visibility: hidden;
            backface-visibility: hidden;
            border-radius: 18px;
            background: linear-gradient(145deg,rgb(197, 194, 194),rgb(214, 212, 212));
            border: 2px solid #21a8f4;
            box-shadow: 0 25px 50px rgba(0, 0, 0, 0.5), 
                        0 0 35px rgba(64, 224, 255, 0.1);
            padding: 35px;
            display: flex;
            flex-direction: column;
            justify-content: space-between;
        }

        .card-back {
            transform: rotateY(180deg);
        }

        .logo {
            display: flex;
            align-items: center;
            gap: 12px;
            margin: auto; 
            margin-bottom: 20px;
        }
        .logo img {
            width: 100%;
            height: 100%;
            
        }

        .contact-info {
            display: flex;
            flex-direction: column;
            gap: 8px;
        }

        .contact-item {
            display: flex;
            align-items: center;
            gap: 12px;
            font-size: 15px;
            color: #1a1b30;
        }
        .contact-item a {
            color: #1a1b30;
            text-decoration: none;
        }

        .contact-icon {
            width: 28px;
            height: 28px;
            background: #21a8f4;
            border-radius: 3px;
            display: flex;
            align-items: center;
            justify-content: center;
            flex-shrink: 0;
        }

        .flip-arrow {
            position: absolute;
            bottom: 15px;
            right: 15px;
            width: 40px;
            height: 40px;
            background: linear-gradient(45deg, #21a8f4, #60a5fa);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            cursor: pointer;
            transition: all 0.3s ease;
            box-shadow: 0 8px 16px rgba(64, 224, 255, 0.3);
            z-index: 10;
        }

        .flip-arrow:hover {
            transform: scale(1.1);
            box-shadow: 0 12px 20px rgba(64, 224, 255, 0.4);
        }

        .flip-arrow::before {
            content: '↻';
            color: white;
            font-size: 18px;
            font-weight: bold;
            transition: transform 0.3s ease;
        }

        .business-card.flipped .flip-arrow::before {
            transform: rotate(180deg);
        }

        .description {
            font-size: 18px;
            
            color: #1a1b30;
            text-align: center;
        }
        .description p {
            margin-bottom: 15px;
            line-height: 1.6;
        }

        .description h3 {
            color: #21a8f4;
            margin-bottom: 18px;
            font-size: 24px;
        }

        .impressum {
            margin-top: 10vh;
            padding: 40px 20px;
            background: rgba(10, 10, 10, 0.95);
            width: 100%;
        }

        .impressum h2 {
            color: #21a8f4;
            margin-bottom: 30px;
            font-size: 28px;
            text-align: center;
        }

        .impressum p {
            margin-bottom: 20px;
            line-height: 1.7;
            color: #b0b0b0;
            font-size: 15px;
            max-width: 800px;
            margin-left: auto;
            margin-right: auto;
        }

        .impressum strong {
            color: #ffffff;
        }

        .impressum a {
            color: #21a8f4;
            text-decoration: none;
        }

        .impressum a:hover {
            text-decoration: underline;
        }

        @media (max-width: 480px) {
            .business-card {
                width: 320px;
                height: 320px;
            }
            
            .card-face {
                padding: 25px;
                border-radius: 15px;
            }
            
            .name {
                font-size: 22px;
            }
            
            .title {
                font-size: 14px;
                margin-bottom: 25px;
            }
            
            .contact-item {
                font-size: 13px;
                gap: 10px;
            }
            
            .contact-icon {
                width: 16px;
                height: 16px;
            }
            
            .description {
                font-size: 15px;
            }
            
            .description h3 {
                font-size: 20px;
                margin-bottom: 15px;
            }
            
            .flip-arrow {
                bottom: 12px;
                right: 12px;
                width: 35px;
                height: 35px;
            }
            
            .flip-arrow::before {
                font-size: 16px;
            }
        }

        @media (max-width: 360px) {
            .business-card {
                width: 280px;
                height: 300px;
            }
            
            .card-face {
                padding: 20px;
            }
            
            .name {
                font-size: 20px;
            }
            
            .title {
                font-size: 13px;
            }
            
            .contact-item {
                font-size: 12px;
            }
            
            .description {
                font-size: 14px;
            }
            
            .description h3 {
                font-size: 18px;
            }
        }

        /* Footer */
        footer {
            padding: 40px 0;
            text-align: center;
        }

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

        .tech-pattern {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            opacity: 0.03;
            z-index: -1;
            background-image: 
                linear-gradient(45deg, transparent 40%, rgba(64, 224, 255, 0.1) 50%, transparent 60%),
                radial-gradient(circle at 20% 80%, rgba(64, 224, 255, 0.1) 0%, transparent 50%),
                radial-gradient(circle at 80% 20%, rgba(64, 224, 255, 0.1) 0%, transparent 50%);
        }