:root{color-scheme:light;--page-bg: #f7f8fc;--surface: #ffffff;--surface-raised: #f9fbff;--surface-muted: #eef2f8;--panel-bg: rgba(255, 255, 255, .94);--switch-bg: rgba(255, 255, 255, .92);--page-gradient: radial-gradient(circle at top left, rgba(37, 99, 235, .1), transparent 28rem), linear-gradient(180deg, var(--page-bg), #eef3fb);--text: #111827;--text-soft: #475569;--text-muted: #64748b;--border: #d9e1ec;--border-strong: #b7c4d6;--primary: #2563eb;--primary-strong: #1d4ed8;--primary-soft: #dbeafe;--accent: #0f766e;--accent-soft: #ccfbf1;--warning: #d97706;--focus: #f59e0b;--shadow: 0 24px 60px rgba(15, 23, 42, .08);--control-shadow: 0 1px 2px rgba(15, 23, 42, .08);color:var(--text);background:var(--page-gradient);font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif;font-synthesis:none;text-rendering:optimizeLegibility}:root[data-theme=dark]{color-scheme:dark;--page-bg: #0b1120;--surface: #111827;--surface-raised: #172033;--surface-muted: #1e293b;--panel-bg: rgba(17, 24, 39, .94);--switch-bg: rgba(17, 24, 39, .92);--page-gradient: radial-gradient(circle at top left, rgba(96, 165, 250, .18), transparent 30rem), linear-gradient(180deg, var(--page-bg), #111827);--text: #e5edf7;--text-soft: #b8c4d5;--text-muted: #8fa0b6;--border: #263449;--border-strong: #3a4a63;--primary: #60a5fa;--primary-strong: #3b82f6;--primary-soft: rgba(96, 165, 250, .18);--accent: #2dd4bf;--accent-soft: rgba(45, 212, 191, .16);--warning: #fbbf24;--focus: #fbbf24;--shadow: 0 28px 80px rgba(0, 0, 0, .35);--control-shadow: 0 1px 2px rgba(0, 0, 0, .28);background:var(--page-gradient)}*{box-sizing:border-box}body{margin:0;min-width:320px;min-height:100vh;background:var(--page-gradient);color:var(--text)}button,input,select,textarea{font:inherit}button{min-height:2.75rem;border:0;border-radius:6px;padding:0 1rem;background:var(--primary);color:#fff;font-weight:700;cursor:pointer;box-shadow:var(--control-shadow);transition:background-color .14s ease,border-color .14s ease,box-shadow .14s ease,color .14s ease,transform .14s ease}button:not(:disabled):hover{background:var(--primary-strong);transform:translateY(-1px)}button:disabled{cursor:not-allowed;opacity:.45}.secondary-button{border:1px solid var(--border);background:var(--surface-raised);color:var(--text-soft)}.secondary-button:not(:disabled):hover{border-color:var(--border-strong);background:var(--surface-muted);color:var(--text)}button:focus-visible,input:focus-visible,select:focus-visible,textarea:focus-visible{outline:3px solid var(--focus);outline-offset:3px}.app-shell{width:min(100% - 2rem,1180px);margin:0 auto;padding:2rem 0 3rem}.app-header,.panel-header{display:flex;align-items:flex-start;justify-content:space-between;gap:1rem;margin-bottom:1.5rem}.app-header{align-items:flex-end;border-bottom:1px solid var(--border);padding-bottom:1rem}.eyebrow{margin:0 0 .5rem;color:var(--accent);font-size:.875rem;font-weight:800;text-transform:uppercase}h1,h2,p{margin-top:0}h1{margin-bottom:0;font-size:clamp(2rem,5vw,3.5rem);line-height:1;letter-spacing:0;color:var(--text)}h2{margin-bottom:0;font-size:1.5rem;line-height:1.2;color:var(--text)}.header-actions{display:flex;flex-wrap:wrap;justify-content:flex-end;gap:.75rem}.theme-toggle{border:1px solid var(--border);background:var(--surface);color:var(--text-soft)}.theme-toggle:not(:disabled):hover{border-color:var(--primary);background:var(--primary-soft);color:var(--text)}.mode-switch,.button-row{display:flex;flex-wrap:wrap;gap:.5rem}.mode-switch{padding:.25rem;border:1px solid var(--border);border-radius:8px;background:var(--switch-bg);box-shadow:var(--control-shadow)}.mode-switch button{background:transparent;color:var(--text-soft);box-shadow:none}.mode-switch button.active{background:var(--primary);color:#fff}.workflow-panel{min-height:34rem;border:1px solid var(--border);border-radius:8px;padding:1.5rem;background:var(--panel-bg);box-shadow:var(--shadow)}.status-pill{max-width:18rem;border-radius:999px;padding:.35rem .75rem;background:var(--accent-soft);color:var(--accent);font-size:.875rem;font-weight:700;overflow-wrap:anywhere}.form-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:1rem}.sender-workbench,.receiver-workbench{display:grid;grid-template-columns:minmax(0,1fr) minmax(22rem,34rem);gap:1.5rem;align-items:start}.receiver-workbench{grid-template-columns:minmax(20rem,34rem) minmax(0,1fr)}.control-stack,.visual-stack{display:grid;gap:1rem}.visual-stack{justify-items:stretch}.field,.check-row{display:grid;gap:.4rem}.field span,.check-row span{color:var(--text-soft);font-size:.9rem;font-weight:700}.field input,.field select,.field textarea{width:100%;border:1px solid var(--border);border-radius:6px;padding:.75rem;background:var(--surface-raised);color:var(--text);box-shadow:var(--control-shadow)}.field input:hover,.field select:hover,.field textarea:hover{border-color:var(--border-strong)}.field textarea{min-height:7rem;resize:vertical}.check-row{align-content:center;grid-template-columns:auto 1fr;min-height:2.75rem;border:1px solid var(--border);border-radius:6px;padding:.65rem .75rem;background:var(--surface-raised);box-shadow:var(--control-shadow)}.toggle-cluster,.replay-panel,.manual-frame-panel{display:grid;gap:.75rem}.toggle-cluster{grid-template-columns:repeat(2,minmax(0,1fr))}.replay-panel{grid-template-columns:minmax(0,1fr) auto;align-items:end;border-top:1px solid var(--border);padding-top:1rem}.metadata-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:.75rem;margin:0}.receiver-workbench .metadata-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.metadata-grid div{min-height:4.5rem;border:1px solid var(--border);border-radius:8px;padding:.75rem;background:var(--surface-raised)}.metadata-grid dt{color:var(--text-muted);font-size:.8rem;font-weight:700}.metadata-grid dd{margin:.35rem 0 0;font-weight:800;overflow-wrap:anywhere}.progress-track{height:.65rem;margin:1rem 0;overflow:hidden;border-radius:999px;background:var(--surface-muted)}.progress-track span{display:block;height:100%;background:linear-gradient(90deg,var(--primary),var(--accent));transition:width .16s ease}.qr-stage{display:grid;place-items:center;width:min(100%,32rem);aspect-ratio:1;margin:0;border:1px solid var(--border);border-radius:8px;background:var(--surface-raised);color:var(--text-muted);text-align:center}.qr-stage img{width:100%;height:100%;object-fit:contain}.camera-preview{width:100%;aspect-ratio:4 / 3;margin:0;border:1px solid var(--border);border-radius:8px;background:#020617}.scan-canvas{display:none}.error-text{margin:1rem 0 0;color:var(--warning);font-weight:700}.primary-actions{align-items:center}.frame-details{border-top:1px solid var(--border);padding-top:.75rem}.frame-details summary{color:var(--text-soft);cursor:pointer;font-weight:800}.frame-details .field{margin-top:.75rem}@media(max-width:760px){.app-shell{width:min(100% - 1rem,1080px);padding:1.5rem 0}.app-header,.panel-header{display:grid}.form-grid,.metadata-grid,.sender-workbench,.receiver-workbench,.toggle-cluster,.replay-panel{grid-template-columns:1fr}.workflow-panel{padding:1rem}.status-pill{max-width:100%}.qr-stage{width:100%}}