:root{--primary-color: #4CAF50;--hover-color: #45a049;--success-color: #4CAF50;--error-color: #ff4444;--text-color: #333;--background-color: #f5f5f5}body{margin:0;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Oxygen,Ubuntu,Cantarell,Open Sans,Helvetica Neue,sans-serif}#app{max-width:1200px;margin:0 auto;padding:2rem}.scanner-controls{display:grid;gap:1rem;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));margin-bottom:2rem}.scan-btn{transition:background-color .3s ease;cursor:pointer;color:#fff;padding:1rem 2rem;border:none;border-radius:28px;font-size:1rem}.error{color:var(--error-color)}.success{color:var(--success-color)}.status-display{display:flex;flex-direction:column;align-items:self-start;gap:1rem}