:root{--bg:#f7f8fa;--surface:#fff;--border:#e5e7eb;--text:#111827;--text-muted:#6b7280;--primary:#0f172a;--accent:#2563eb;--success:#16a34a;--success-bg:#dcfce7;--danger:#dc2626;--danger-bg:#fee2e2;--warning:#d97706;--warning-bg:#fef3c7;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica,Arial,sans-serif}*{box-sizing:border-box}body{background:var(--bg);color:var(--text);margin:0}a{color:inherit;text-decoration:none}.app-shell{min-height:100vh;display:flex}.sidebar{background:var(--primary);color:#fff;flex-shrink:0;width:220px;padding:24px 16px}.sidebar .brand{margin-bottom:32px;padding:0 8px;font-size:18px;font-weight:700}.sidebar nav a{color:#cbd5e1;border-radius:8px;margin-bottom:4px;padding:10px 12px;font-size:14px;display:block}.sidebar nav a:hover,.sidebar nav a.active{color:#fff;background:#ffffff14}.sidebar .logout-btn{color:#cbd5e1;cursor:pointer;background:0 0;border:1px solid #334155;border-radius:8px;width:100%;margin-top:24px;padding:10px;font-size:13px}.main{flex:1;max-width:1100px;padding:32px 40px}.page-title{margin-bottom:24px;font-size:22px;font-weight:700}.card{background:var(--surface);border:1px solid var(--border);border-radius:12px;padding:20px}.card+.card{margin-top:16px}.stat-grid{grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:16px;margin-bottom:24px;display:grid}.stat-card{background:var(--surface);border:1px solid var(--border);border-radius:12px;padding:20px}.stat-label{color:var(--text-muted);margin-bottom:8px;font-size:13px}.stat-value{font-size:24px;font-weight:700}table{border-collapse:collapse;width:100%;font-size:14px}th{text-align:left;color:var(--text-muted);border-bottom:1px solid var(--border);text-transform:uppercase;padding:10px 12px;font-size:12px;font-weight:600}td{border-bottom:1px solid var(--border);padding:12px}tr:last-child td{border-bottom:none}.badge{border-radius:999px;padding:3px 10px;font-size:12px;font-weight:600;display:inline-block}.badge-completed{background:var(--success-bg);color:var(--success)}.badge-pending,.badge-processing{background:var(--warning-bg);color:var(--warning)}.badge-failed,.badge-cancelled,.badge-expired{background:var(--danger-bg);color:var(--danger)}.badge-reversed{color:#4338ca;background:#e0e7ff}.btn{background:var(--accent);color:#fff;cursor:pointer;border:none;border-radius:8px;padding:10px 18px;font-size:14px;font-weight:600;display:inline-block}.btn:hover{opacity:.92}.btn-secondary{color:var(--text);border:1px solid var(--border);background:#fff}.btn-danger{background:var(--danger)}.btn:disabled{opacity:.6;cursor:not-allowed}input,select,textarea{border:1px solid var(--border);width:100%;color:var(--text);background:#fff;border-radius:8px;padding:10px 12px;font-size:14px}label{color:var(--text-muted);margin-bottom:6px;font-size:13px;font-weight:600;display:block}.field{margin-bottom:16px}.auth-shell{background:var(--bg);justify-content:center;align-items:center;min-height:100vh;display:flex}.auth-card{background:var(--surface);border:1px solid var(--border);border-radius:16px;width:380px;padding:32px}.auth-card h1{margin-bottom:4px;font-size:20px}.auth-card p.subtitle{color:var(--text-muted);margin-bottom:24px;font-size:14px}.error-msg{background:var(--danger-bg);color:var(--danger);border-radius:8px;margin-bottom:16px;padding:10px 12px;font-size:13px}.success-msg{background:var(--success-bg);color:var(--success);border-radius:8px;margin-bottom:16px;padding:10px 12px;font-size:13px}.key-reveal{color:#4ade80;word-break:break-all;background:#0f172a;border-radius:8px;margin:12px 0;padding:14px;font-family:monospace;font-size:13px}.muted{color:var(--text-muted);font-size:13px}.row-between{justify-content:space-between;align-items:center;margin-bottom:20px;display:flex}.card{overflow-x:auto}.card table{min-width:560px}.banner{background:var(--warning-bg);color:var(--warning);border:1px solid #fde68a;border-radius:10px;margin-bottom:20px;padding:14px 18px;font-size:14px}@media (width<=768px){.app-shell{flex-direction:column;min-height:auto}.sidebar{flex-wrap:wrap;justify-content:space-between;align-items:center;gap:8px;width:100%;padding:12px 16px;display:flex}.sidebar .brand{margin-bottom:0;font-size:15px}.sidebar nav{-webkit-overflow-scrolling:touch;order:3;gap:4px;width:100%;display:flex;overflow-x:auto}.sidebar nav a{white-space:nowrap;margin-bottom:0;padding:8px 12px;font-size:13px}.sidebar .logout-btn{width:auto;margin-top:0;padding:6px 10px;font-size:12px}.main{padding:16px}.page-title{font-size:18px}.stat-grid{grid-template-columns:repeat(2,1fr);gap:10px}.stat-card{padding:14px}.stat-value{font-size:19px}.auth-card{width:100%;max-width:360px;padding:24px}form[style*=flex]{flex-direction:column;align-items:stretch!important}}@media (width<=480px){.stat-grid{grid-template-columns:1fr 1fr}}