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

        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
            min-height: 100vh;
            display: flex;
            align-items: center;
            justify-content: center;
            padding: 20px;
        }

        .container {
            background: rgba(255, 255, 255, 0.95);
            padding: 40px;
            border-radius: 20px;
            box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
            backdrop-filter: blur(10px);
            width: 100%;
            max-width: 500px;
            animation: slideIn 0.5s ease-out;
        }

        @keyframes slideIn {
            from {
                opacity: 0;
                transform: translateY(30px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }

        .header {
            text-align: center;
            margin-bottom: 30px;
        }

        .header h1 {
            color: #333;
            font-size: 2em;
            margin-bottom: 10px;
        }

        .header p {
            color: #666;
            font-size: 1.1em;
        }

        .form-group {
            margin-bottom: 25px;
            position: relative;
        }

        .form-group label {
            display: block;
            margin-bottom: 8px;
            color: #333;
            font-weight: 600;
            font-size: 1em;
        }

        .form-group input {
            width: 100%;
            padding: 15px;
            border: 2px solid #e1e5e9;
            border-radius: 10px;
            font-size: 1em;
            transition: all 0.3s ease;
            background: #fff;
        }

        .form-group input:focus {
            outline: none;
            border-color: #667eea;
            box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
            transform: translateY(-2px);
        }

        .form-group input:hover {
            border-color: #667eea;
        }

        .required {
            color: #e74c3c;
        }

        .btn-container {
            display: flex;
            gap: 15px;
            margin-top: 30px;
        }

        .btn {
            flex: 1;
            padding: 15px 25px;
            border: none;
            border-radius: 10px;
            font-size: 1.1em;
            font-weight: 600;
            cursor: pointer;
            transition: all 0.3s ease;
            text-transform: uppercase;
            letter-spacing: 0.5px;
        }

        .btn-primary {
            background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
            color: white;
        }

        .btn-primary:hover {
            transform: translateY(-2px);
            box-shadow: 0 10px 20px rgba(102, 126, 234, 0.3);
        }

        .btn-secondary {
            background: #f8f9fa;
            color: #666;
            border: 2px solid #e1e5e9;
        }

        .btn-secondary:hover {
            background: #e9ecef;
            transform: translateY(-2px);
        }

        .data-table {
            margin-top: 30px;
            background: #f8f9fa;
            border-radius: 10px;
            padding: 20px;
            max-height: 300px;
            overflow-y: auto;
        }

        .data-table h3 {
            color: #333;
            margin-bottom: 15px;
            text-align: center;
        }

        .data-entry {
            background: white;
            padding: 15px;
            margin-bottom: 10px;
            border-radius: 8px;
            border-left: 4px solid #667eea;
            animation: fadeIn 0.3s ease-out;
        }

        @keyframes fadeIn {
            from {
                opacity: 0;
                transform: translateX(-20px);
            }
            to {
                opacity: 1;
                transform: translateX(0);
            }
        }

        .data-entry strong {
            color: #333;
        }

        .data-entry span {
            color: #666;
        }

        .success-message {
            background: #d4edda;
            color: #155724;
            padding: 15px;
            border-radius: 8px;
            margin-bottom: 20px;
            border: 1px solid #c3e6cb;
            animation: fadeIn 0.3s ease-out;
        }

        .counter {
            text-align: center;
            margin-top: 15px;
            color: #666;
            font-weight: 600;
        }

        .read-uid-btn {
            background: linear-gradient(135deg, #28a745 0%, #20c997 100%);
            color: white;
            border: none;
            padding: 15px 20px;
            border-radius: 10px;
            font-size: 0.9em;
            font-weight: 600;
            cursor: pointer;
            transition: all 0.3s ease;
            text-transform: uppercase;
            letter-spacing: 0.5px;
            white-space: nowrap;
            min-width: 120px;
        }

        .read-uid-btn:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 16px rgba(40, 167, 69, 0.3);
        }

        .read-uid-btn:disabled {
            background: #6c757d;
            cursor: not-allowed;
            transform: none;
            box-shadow: none;
        }

        .read-uid-btn.reading {
            background: linear-gradient(135deg, #fd7e14 0%, #e83e8c 100%);
            animation: pulse 1.5s infinite;
        }

        @keyframes pulse {
            0% { transform: scale(1); }
            50% { transform: scale(1.05); }
            100% { transform: scale(1); }
        }
            .container {
                padding: 30px 20px;
                margin: 10px;
            }

            .btn-container {
                flex-direction: column;
            }