*{margin:0;padding:0;box-sizing:border-box}:root{--primary-color: #2563eb;--primary-hover: #1d4ed8;--secondary-color: #6b7280;--danger-color: #dc2626;--success-color: #16a34a;--warning-color: #f59e0b;--bg-color: #f3f4f6;--card-bg: #ffffff;--text-color: #1f2937;--text-muted: #6b7280;--border-color: #e5e7eb;--shadow: 0 1px 3px rgba(0, 0, 0, .1);--shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, .1);--capture-bg: #ffffff;--capture-border: #ffffff}[data-theme=dark]{--primary-color: #3b82f6;--primary-hover: #2563eb;--secondary-color: #4b5563;--bg-color: #111827;--card-bg: #1f2937;--text-color: #f9fafb;--text-muted: #9ca3af;--border-color: #374151;--shadow: 0 1px 3px rgba(0, 0, 0, .3);--shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, .3);--capture-bg: #1f2937;--capture-border: #374151}html,body{height:100%}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif;background:var(--bg-color);color:var(--text-color);min-height:100vh;-webkit-tap-highlight-color:transparent}.container{max-width:600px;margin:0 auto;padding:12px;min-height:100vh;display:flex;flex-direction:column}header{text-align:center;padding:16px 0}.header-row{display:flex;align-items:center;justify-content:center;gap:12px}header h1{font-size:1.5rem;color:var(--primary-color);margin-bottom:4px}.btn-theme{width:36px;height:36px;border:none;background:var(--card-bg);border-radius:50%;cursor:pointer;display:flex;align-items:center;justify-content:center;box-shadow:var(--shadow)}.theme-icon{width:20px;height:20px;stroke:var(--text-color)}.theme-icon-dark,[data-theme=dark] .theme-icon-light{display:none}[data-theme=dark] 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9999px #0000004d}.scan-region:before{content:"";position:absolute;top:0;left:0;right:0;height:2px;background:var(--primary-color);animation:scan 2s ease-in-out infinite}@keyframes scan{0%,to{top:0}50%{top:calc(100% - 2px)}}.camera-controls{display:flex;align-items:center;justify-content:center;gap:24px;padding:8px}.btn-icon{width:48px;height:48px;border-radius:50%;background:var(--card-bg);border:none;cursor:pointer;box-shadow:var(--shadow);display:flex;align-items:center;justify-content:center;color:var(--text-color);transition:all .2s}.btn-icon:hover{background:var(--bg-color)}.btn-icon:active{transform:scale(.95)}.btn-round{width:52px;height:52px;padding:0;border-radius:50%}.btn-round .btn-icon-svg{width:24px;height:24px}.btn-capture{width:68px;height:68px;padding:0;border-radius:50%;background:transparent;border:4px solid var(--capture-border);cursor:pointer;display:flex;align-items:center;justify-content:center;box-shadow:0 2px 8px 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