:root{color-scheme:light;font-family:system-ui,-apple-system,Segoe UI,Roboto,sans-serif}body{margin:0;background:#f8fafc;color:#0f172a}*{box-sizing:border-box}.header{background:#0067fd;color:#fff;padding:14px 16px}.header .inner{max-width:960px;margin:0 auto;display:flex;align-items:center;justify-content:space-between;gap:10px;flex-wrap:wrap}.brand{font-weight:800;font-size:1.15rem;display:flex;align-items:center;gap:10px}.brand-logo{width:34px;height:34px;border-radius:50%;background:#fff;object-fit:cover}.container{max-width:960px;margin:0 auto;padding:16px}.hero{background:linear-gradient(135deg,#0067fd,#0b4fd8);color:#fff;text-align:center;padding:48px 16px}.hero-inner h1{font-size:clamp(1.5rem,4vw,2.4rem);margin:0 0 12px}.hero-sub{max-width:620px;margin:0 auto 20px;color:#ffffffeb}.section-title{font-size:1.25rem;margin:28px 0 10px}.footer{text-align:center;color:#64748b;font-size:.8rem;padding:24px 16px}.card{background:#fff;border:1px solid #e2e8f0;border-radius:12px;padding:14px;box-shadow:0 1px 2px #0f172a0d;text-decoration:none;color:inherit;display:block}.card:hover{border-color:#0067fd}.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(210px,1fr));gap:14px}.grid.stats{grid-template-columns:repeat(auto-fill,minmax(180px,1fr));margin:16px 0}.avatar{width:44px;height:44px;border-radius:10px;background:#dbeafe;color:#0067fd;font-weight:800;display:flex;align-items:center;justify-content:center;font-size:1.1rem;margin-bottom:8px}.name{font-weight:700}.muted{color:#64748b;font-size:.8rem}.err{color:#b91c1c;background:#fef2f2;border:1px solid #fecaca;border-radius:8px;padding:8px 10px;font-size:.85rem}.ok{color:#15803d;background:#f0fdf4;border:1px solid #bbf7d0;border-radius:8px;padding:8px 10px;font-size:.85rem}button,.btn{border:0;border-radius:8px;padding:9px 13px;font-size:.85rem;font-weight:600;background:#0067fd;color:#fff;cursor:pointer;text-decoration:none;display:inline-block}.btn.big{padding:12px 22px;font-size:1rem}.btn.light{background:#fff;color:#0067fd}.btn.ghost{background:#eff6ff;color:#0067fd;border:1px solid #bfdbfe}input,select{padding:9px 10px;border:1px solid #cbd5e1;border-radius:8px;font-size:.9rem;width:100%}.stack{display:flex;flex-direction:column;gap:8px}.row{display:flex;gap:8px;align-items:center}.row.center{justify-content:center}.back{display:inline-block;margin-top:10px;color:#0067fd;font-weight:600;text-decoration:none;font-size:.85rem}.login{min-height:100vh;display:flex;align-items:center;justify-content:center;padding:16px}.login .card{max-width:420px;width:100%}.login h1{font-size:1.3rem}.tier-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(160px,1fr));gap:14px;margin:14px 0}.tier-card{text-align:center;padding:16px 12px}.tier-badge{display:inline-block;border-radius:999px;padding:3px 10px;font-size:.7rem;font-weight:700;background:#e2e8f0;color:#334155;margin-bottom:8px}.tier-rate{font-size:2rem;font-weight:800;color:#0067fd}.tier-1 .tier-badge{background:#0067fd;color:#fff}.tier-2 .tier-badge{background:#2563eb;color:#fff}.tier-3 .tier-badge{background:#7c3aed;color:#fff}.tier-4 .tier-badge{background:#0891b2;color:#fff}.tier-5 .tier-badge{background:#64748b;color:#fff}.ref-card{background:#fff;border:1px solid #bfdbfe;border-radius:14px;padding:16px;display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;margin:16px 0;box-shadow:0 2px 6px #0067fd14}.ref-code{font-size:1.9rem;font-weight:800;letter-spacing:2px;color:#0067fd;font-family:ui-monospace,SFMono-Regular,Menlo,monospace}.qr{width:140px;height:140px;border:1px solid #e2e8f0;border-radius:10px;background:#fff}.stat{font-size:1.35rem;font-weight:800;color:#0f172a}.tree-card{padding:8px}.tree-node{padding-left:0}.tree-children{margin-left:22px;padding-left:12px;border-left:2px solid #e2e8f0}.tree-row{display:flex;align-items:center;gap:10px;padding:8px 10px;border-radius:10px}.tree-row:hover{background:#f1f5f9}.tree-toggle{width:18px;text-align:center;color:#64748b;font-weight:700;flex:0 0 auto}.tree-avatar{width:36px;height:36px;border-radius:50%;background:#dbeafe;color:#0067fd;font-weight:800;display:flex;align-items:center;justify-content:center;flex:0 0 auto}.tree-info{flex:1;min-width:0}.tree-name{font-weight:700;font-size:.92rem}.tree-code{font-size:.75rem;color:#475569;background:#f1f5f9;border-radius:4px;padding:1px 5px}.badge{border-radius:999px;padding:2px 8px;font-size:.68rem;font-weight:700;background:#e2e8f0;color:#334155;white-space:nowrap}.badge.paid{background:#dcfce7;color:#15803d}.badge.earned{background:#dbeafe;color:#1d4ed8}.badge.void{background:#fee2e2;color:#b91c1c}.badge.tier-1{background:#0067fd;color:#fff}.badge.tier-2{background:#2563eb;color:#fff}.badge.tier-3{background:#7c3aed;color:#fff}.badge.tier-4{background:#0891b2;color:#fff}.badge.tier-5{background:#64748b;color:#fff}table{width:100%;border-collapse:collapse;font-size:.85rem}th,td{text-align:left;padding:8px 10px;border-bottom:1px solid #eef2f7}th{color:#64748b;font-size:.72rem;text-transform:uppercase;letter-spacing:.04em}code{font-family:ui-monospace,SFMono-Regular,Menlo,monospace}