:root{--bg: #f4f6f8;--surface: #ffffff;--border: #e0e4e8;--text: #1a1f24;--muted: #6b7280;--primary: #2563eb;--primary-dark: #1d4ed8;--danger: #dc2626;--success: #16a34a;color-scheme:light}*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--text);font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif}button{cursor:pointer;font-family:inherit;border:none;border-radius:8px;background:var(--primary);color:#fff;padding:10px 16px;font-size:14px}button:hover{background:var(--primary-dark)}button:disabled{opacity:.6;cursor:not-allowed}button.secondary{background:var(--surface);color:var(--text);border:1px solid var(--border)}button.link-button{background:none;color:var(--primary);padding:0;text-decoration:underline}input,select,textarea{font-family:inherit;font-size:14px;padding:8px 10px;border:1px solid var(--border);border-radius:6px;background:var(--surface);color:var(--text)}label{display:flex;flex-direction:column;gap:4px;font-size:13px;color:var(--muted)}.muted{color:var(--muted);font-size:13px}.error-text{color:var(--danger);font-size:13px}a{color:var(--primary)}.login-screen{min-height:100vh;display:flex;align-items:center;justify-content:center;padding:16px}.login-card{background:var(--surface);padding:32px;border-radius:12px;box-shadow:0 1px 3px #0000001a;width:100%;max-width:360px;display:flex;flex-direction:column;gap:14px}.login-card h1{margin:0}.page-loading{padding:40px;text-align:center;color:var(--muted)}.app-shell{min-height:100vh;display:flex;flex-direction:column}.topbar{background:var(--surface);border-bottom:1px solid var(--border);padding:10px 16px;display:flex;justify-content:space-between;align-items:center}.brand{font-weight:700}.topbar-user{display:flex;align-items:center;gap:12px;font-size:14px}.tabbar{background:var(--surface);border-bottom:1px solid var(--border);display:flex;overflow-x:auto}.tab{padding:12px 16px;text-decoration:none;color:var(--muted);font-size:14px;white-space:nowrap;border-bottom:2px solid transparent}.tab.active{color:var(--primary);border-bottom-color:var(--primary)}.content{flex:1;padding:16px;max-width:720px;width:100%;margin:0 auto}.app-footer{display:flex;justify-content:space-between;gap:12px;padding:10px 16px;border-top:1px solid var(--border);background:var(--surface);color:var(--muted);font-size:12px}.scan-page{display:flex;flex-direction:column;gap:16px}.scanner{display:flex;flex-direction:column;align-items:center;gap:10px}.scanner-frame{position:relative;width:100%;max-width:400px;aspect-ratio:4 / 3;border-radius:8px;overflow:hidden;background:#000}.scanner-video{position:absolute;top:0;right:0;bottom:0;left:0;width:100%;height:100%;object-fit:cover}.scanner-guide{position:absolute;left:8%;right:8%;top:50%;height:110px;transform:translateY(-50%);border:2px solid rgba(255,255,255,.85);border-radius:8px;box-shadow:0 0 0 999px #00000059;overflow:hidden}.scanner-guide:before,.scanner-guide:after{content:"";position:absolute;width:22px;height:22px;border:3px solid var(--primary)}.scanner-guide:before{top:-3px;left:-3px;border-right:none;border-bottom:none}.scanner-guide:after{bottom:-3px;right:-3px;border-left:none;border-top:none}.scanner-guide-line{position:absolute;left:0;right:0;top:4px;height:2px;background:var(--primary);box-shadow:0 0 6px var(--primary);animation:scanline 1.6s ease-in-out infinite;will-change:transform}@keyframes scanline{0%,to{transform:translateY(0)}50%{transform:translateY(96px)}}.scanner-hint{position:absolute;left:0;right:0;bottom:8px;text-align:center;color:#fff;font-size:13px;text-shadow:0 1px 3px rgba(0,0,0,.8)}.divider{text-align:center;color:var(--muted);font-size:13px}.manual-scan-form{display:flex;flex-direction:column;gap:10px}.device-card-list{display:flex;flex-direction:column;gap:10px;margin-top:12px}.device-card{background:var(--surface);border:1px solid var(--border);border-radius:8px;padding:12px 14px;text-decoration:none;color:var(--text);display:flex;flex-direction:column;gap:2px}.device-card-serial{font-weight:600}.chat-page{display:flex;flex-direction:column;gap:12px;height:calc(100vh - 140px)}.device-header{display:flex;justify-content:space-between;align-items:flex-start;background:var(--surface);border:1px solid var(--border);border-radius:8px;padding:12px 14px}.device-header h2{margin:0 0 2px}.device-service-date{font-size:13px;text-align:right}.chat-window{flex:1;display:flex;flex-direction:column;background:var(--surface);border:1px solid var(--border);border-radius:8px;overflow:hidden}.chat-messages{flex:1;overflow-y:auto;padding:14px;display:flex;flex-direction:column;gap:10px}.chat-bubble{background:var(--bg);border-radius:8px;padding:10px 12px;max-width:85%}.chat-bubble.own{align-self:flex-end;background:#dbeafe}.chat-bubble-meta{display:flex;justify-content:space-between;gap:10px;font-size:12px;color:var(--muted);margin-bottom:4px}.chat-bubble p{margin:0;white-space:pre-wrap}.service-badge{display:inline-block;background:#dcfce7;color:#166534;font-size:12px;padding:2px 8px;border-radius:999px;margin-bottom:6px}.service-badge.inline{margin-left:8px;margin-bottom:0}.attachments{display:flex;flex-wrap:wrap;gap:6px;margin-top:6px}.attachments img{width:96px;height:96px;object-fit:cover;border-radius:6px}.attachment-placeholder{width:96px;height:96px;border-radius:6px;background:var(--border)}.chat-composer{border-top:1px solid var(--border);padding:10px;display:flex;flex-direction:column;gap:8px}.chat-composer textarea{resize:vertical}.composer-row{display:flex;align-items:center;gap:10px;flex-wrap:wrap}.file-picker{display:inline-flex;align-items:center;gap:6px;cursor:pointer;font-size:13px;color:var(--text)}.file-picker input{display:none}.checkbox-label{flex-direction:row;align-items:center;gap:6px;color:var(--text);font-size:14px}.service-row{background:#fffbeb;padding:8px 10px;border-radius:6px}.table-scroll{overflow-x:auto;border-radius:8px}.data-table{width:100%;min-width:480px;border-collapse:collapse;background:var(--surface);border:1px solid var(--border);border-radius:8px;overflow:hidden}.data-table th,.data-table td{text-align:left;padding:10px 12px;border-bottom:1px solid var(--border);font-size:14px}.data-table th{background:var(--bg);color:var(--muted);font-weight:600;font-size:12px;text-transform:uppercase}.clickable-row{cursor:pointer}.clickable-row:hover{background:var(--bg)}.selected-row{background:#dbeafe;cursor:pointer}.page-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:14px}.inline-form{display:flex;flex-wrap:wrap;gap:12px;align-items:flex-end;background:var(--surface);border:1px solid var(--border);border-radius:8px;padding:14px;margin-bottom:16px}.subtabbar{display:flex;gap:8px;margin-bottom:14px}.subtab{background:var(--surface);color:var(--muted);border:1px solid var(--border)}.subtab.active{background:var(--primary);color:#fff;border-color:var(--primary)}.filter-row{display:flex;gap:12px;align-items:flex-end;margin-bottom:14px;flex-wrap:wrap}.report-section{display:flex;flex-direction:column;gap:10px}.drilldown{background:var(--surface);border:1px solid var(--border);border-radius:8px;padding:14px;margin-top:10px}.drilldown-list{list-style:none;padding:0;margin:0;display:flex;flex-direction:column;gap:10px}.drilldown-list li{border-bottom:1px solid var(--border);padding-bottom:8px}@media (max-width: 480px){.content{padding:10px}}