:root{--bg:#f6f7f9;--card:#ffffff;--text:#17181c;--muted:#6b7280;--primary:#1d4ed8;--primary-hover:#1e40af;--border:#e5e7eb;--success:#15803d;--error:#b91c1c}*{box-sizing:border-box}body{margin:0;font-family:system-ui,-apple-system,Segoe UI,Roboto,sans-serif;background:var(--bg);color:var(--text);-webkit-font-smoothing:antialiased}.container{max-width:760px;margin:0 auto;padding:16px}.card{background:var(--card);border:1px solid var(--border);border-radius:12px;padding:20px;margin-bottom:16px}h1{font-size:20px;margin:0 0 4px}h2{font-size:16px;margin:0 0 12px}.muted{color:var(--muted);font-size:13px}.btn{display:inline-block;background:var(--primary);color:#fff;border:none;border-radius:8px;padding:12px 22px;font-size:15px;font-weight:600;cursor:pointer;width:100%}.btn:hover:not(:disabled){background:var(--primary-hover)}.btn:disabled{opacity:.45;cursor:not-allowed}.btn-secondary{background:transparent;color:var(--primary);border:1px solid var(--border)}.btn-secondary:hover:not(:disabled){background:#f0f4ff}.pdf-viewer{height:60vh;overflow-y:auto;border:1px solid var(--border);border-radius:8px;background:#eceef1;padding:12px}.pdf-viewer canvas{display:block;margin:0 auto 12px;max-width:100%;box-shadow:0 1px 4px rgba(0,0,0,.15);background:#fff}.doc-title{font-size:13px;font-weight:600;margin:8px 0;color:var(--muted)}.otp-input{font-size:28px;letter-spacing:12px;text-align:center;width:100%;padding:10px;border:1px solid var(--border);border-radius:8px;font-feature-settings:"tnum";font-variant-numeric:tabular-nums}.sig-pad{border:1px dashed #9ca3af;border-radius:8px;background:#fff;width:100%;touch-action:none}.tabs{display:flex;gap:8px;margin-bottom:12px}.tab{flex:1 1;padding:8px;border:1px solid var(--border);border-radius:8px;background:transparent;cursor:pointer;font-size:14px}.tab.active{border-color:var(--primary);color:var(--primary);font-weight:600}.typed-input{width:100%;font-size:16px;padding:10px;border:1px solid var(--border);border-radius:8px;margin-bottom:8px}.alert{padding:12px;border-radius:8px;font-size:14px;margin:12px 0}.alert-error{background:#fee2e2;color:var(--error)}.alert-success{background:#dcfce7;color:var(--success)}.alert-info{background:#e0e7ff;color:#3730a3}.center-screen{min-height:70vh;display:flex;align-items:center;justify-content:center;text-align:center}.row{display:flex;gap:8px}.row>*{flex:1 1}.env-banner{position:-webkit-sticky;position:sticky;top:0;z-index:1000;background:#b45309;color:#fff;text-align:center;font-size:13px;padding:6px 12px;letter-spacing:.02em}