*{box-sizing:border-box}:root{color:#15202b;background:#f7f9fb;font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif;font-synthesis:none;line-height:1.5;text-rendering:optimizeLegibility}body{margin:0;min-width:320px;min-height:100vh;background:linear-gradient(180deg,#fff 0,#f7f9fb 42%,#eef4f7)}button,input{font:inherit}button{touch-action:manipulation}.shell{width:min(100%,520px);min-height:100vh;margin:0 auto;padding:max(18px,env(safe-area-inset-top)) 18px max(20px,env(safe-area-inset-bottom));display:flex;flex-direction:column;gap:16px}.topbar{display:flex;align-items:center;justify-content:space-between;gap:12px}.brand{display:flex;align-items:center;gap:10px;min-width:0}.brand-mark{width:42px;height:42px;border-radius:10px;display:grid;place-items:center;background:#0b3b5a;color:#fff;font-weight:800}.brand strong,.section-title{display:block;line-height:1.1;letter-spacing:0}.brand span,.muted{color:#5f6f7a;font-size:.88rem}.status-pill{border:1px solid #bfd6c7;border-radius:999px;padding:7px 10px;color:#176338;background:#eefaf2;font-size:.82rem;white-space:nowrap}.status-pill.warn{border-color:#ead49a;color:#765a09;background:#fff8df}.panel{border:1px solid #dce5eb;border-radius:8px;background:#ffffffeb;box-shadow:0 14px 34px #142d4214;padding:16px}.panel-stack{display:grid;gap:12px}.section-title{margin:0 0 4px;font-size:clamp(1.1rem,5vw,1.55rem)}.section-copy{margin:0;color:#52636f}.actions{display:grid;gap:10px;margin-top:14px}.button{width:100%;min-height:48px;border:0;border-radius:8px;padding:0 14px;display:inline-flex;align-items:center;justify-content:center;gap:9px;color:#fff;background:#0b3b5a;font-weight:750;cursor:pointer}.button.secondary{color:#0b3b5a;border:1px solid #cbd9e1;background:#fff}.button.danger{color:#fff;background:#b63131}.button:disabled{cursor:not-allowed;opacity:.62}.device-row,.challenge-row{display:grid;gap:4px;padding:12px;border:1px solid #dbe5eb;border-radius:8px;background:#fbfdfe}.device-row strong,.challenge-row strong{font-size:.96rem}.form-grid{display:grid;gap:10px;margin-top:14px}.input{width:100%;min-height:46px;border:1px solid #cbd9e1;border-radius:8px;padding:0 12px;background:#fff;color:#15202b}.scanner{overflow:hidden;border:1px solid #cbd9e1;border-radius:8px;background:#0f1720;aspect-ratio:1}.scanner video{width:100%;height:100%;object-fit:cover;display:block}.notice{border:1px solid #cbd9e1;border-radius:8px;padding:11px 12px;color:#304555;background:#f8fbfd;font-size:.94rem}.notice.error{border-color:#f0b4b4;color:#8e2626;background:#fff3f3}.split-actions{display:grid;grid-template-columns:1fr 1fr;gap:10px;margin-top:14px}.footer{margin-top:auto;color:#697a86;font-size:.78rem;text-align:center}@media(max-width:380px){.topbar{align-items:flex-start;flex-direction:column}.status-pill{white-space:normal}}