:root{--bg: #f8fafc;--card: #ffffff;--border: #e2e8f0;--ink: #0f172a;--muted: #64748b;--primary: #2563eb;--primary-d: #1d4ed8;--green: #16a34a;--red: #dc2626;--amber: #d97706}*{box-sizing:border-box}html,body{margin:0;padding:0;background:var(--bg);color:var(--ink);font:15px/1.4 system-ui,-apple-system,Segoe UI,Roboto,Inter,sans-serif;-webkit-tap-highlight-color:transparent}input,button,select{font:inherit}input{-webkit-appearance:none;-moz-appearance:none;appearance:none}button{background:none;border:none;cursor:pointer;padding:0}.app{min-height:100vh;min-height:100dvh;display:flex;flex-direction:column;padding-top:env(safe-area-inset-top);padding-bottom:env(safe-area-inset-bottom)}.app-header{position:sticky;top:0;z-index:10;background:var(--primary);color:#fff;padding:14px 16px;display:flex;align-items:center;gap:12px;box-shadow:0 2px 6px #00000014}.app-header h1{margin:0;font-size:16px;font-weight:700}.app-main{flex:1;padding:16px}.card{background:var(--card);border:1px solid var(--border);border-radius:12px;padding:14px;margin-bottom:10px}.tile{display:grid;grid-template-columns:repeat(2,1fr);gap:10px}.tile button{background:var(--card);border:1px solid var(--border);border-radius:14px;padding:22px 12px;display:flex;flex-direction:column;align-items:center;gap:8px;min-height:110px;cursor:pointer;transition:transform .12s,box-shadow .12s}.tile button:active{transform:scale(.97);box-shadow:0 1px #0000000d}.tile button .emoji{font-size:30px}.tile button .label{font-weight:700;font-size:13px;color:var(--ink)}.btn{width:100%;padding:14px 16px;border-radius:10px;background:var(--primary);color:#fff;font-weight:700;font-size:15px;display:inline-flex;align-items:center;justify-content:center;gap:8px;cursor:pointer}.btn:disabled{opacity:.5;cursor:wait}.btn-outline{background:#fff;color:var(--primary);border:1.5px solid var(--primary)}.btn-success{background:var(--green)}.btn-danger{background:var(--red)}.field{margin-bottom:12px}.field label{display:block;font-size:11.5px;font-weight:700;color:var(--muted);text-transform:uppercase;letter-spacing:.5px;margin-bottom:4px}.field input{width:100%;padding:14px 12px;font-size:16px;border:1.5px solid var(--border);border-radius:10px;background:#fff}.field input:focus{outline:none;border-color:var(--primary)}.alert{padding:10px 12px;border-radius:8px;margin-bottom:12px;font-size:13.5px}.alert-error{background:#fef2f2;border:1px solid #fecaca;color:#b91c1c}.alert-success{background:#f0fdf4;border:1px solid #bbf7d0;color:#15803d}.row{display:flex;justify-content:space-between;align-items:center;gap:10px}.muted{color:var(--muted);font-size:12px}.bold{font-weight:700}.mono{font-family:ui-monospace,SF Mono,Menlo,monospace}.scan-target{border:2px dashed var(--primary);border-radius:12px;padding:18px;background:#eff6ff;text-align:center;margin-bottom:12px}.back{display:inline-flex;align-items:center;gap:6px;color:#ffffffe6;font-weight:600;font-size:14px}