:root{
  --bg1:#0f172a;
  --white:#ffffff;
  --muted:#94a3b8;
  --accent:#22c55e;
  --accent-600:#16a34a;
  --danger:#ef4444;
  --shadow:0 10px 30px rgba(0,0,0,.35);
  --radius:16px;
}
*{box-sizing:border-box}
html,body{height:100%}
body{margin:0;font-family:Inter,ui-sans-serif,system-ui,Segoe UI,Roboto,Arial;color:var(--white);background:linear-gradient(135deg,#0b1020 0%,#0f172a 40%,#0a1a1f 100%) fixed}
.bg-gradient{position:fixed;inset:0;background:radial-gradient(1000px 600px at 10% -10%,rgba(34,197,94,.18),transparent),radial-gradient(900px 600px at 90% 10%,rgba(45,212,191,.16),transparent),radial-gradient(1200px 700px at 50% 120%,rgba(59,130,246,.12),transparent);pointer-events:none}
.glass{background:linear-gradient(180deg,rgba(255,255,255,.06),rgba(255,255,255,.02));backdrop-filter:blur(10px);border:1px solid rgba(255,255,255,.12);border-radius:var(--radius);box-shadow:var(--shadow)}
.glass-lg{background:linear-gradient(180deg,rgba(255,255,255,.08),rgba(255,255,255,.03));backdrop-filter:blur(12px);border:1px solid rgba(255,255,255,.16)}
.topbar{position:sticky;top:0;z-index:10;display:flex;align-items:center;justify-content:space-between;padding:16px 18px;margin:12px}
.brand{display:flex;gap:12px;align-items:center}
.logo{width:40px;height:40px}
.brand-title{font-weight:800;font-size:20px;color:var(--accent);letter-spacing:.3px}
.brand-sub{font-size:12px;color:var(--muted);margin-top:2px}
.session{display:flex;align-items:center;gap:8px}
.pill{padding:8px 12px;border-radius:999px;background:rgba(255,255,255,.10);border:1px solid rgba(255,255,255,.16);font-size:13px;color:#e2e8f0}
.container{max-width:1000px;margin:18px auto 90px auto;padding:0 12px}
.card{padding:18px;border-radius:var(--radius);margin:12px 0}
.center{margin:56px auto;text-align:center}
.title{font-size:28px;margin:0 0 6px 0}
h1,h2,h3{margin:8px 0 12px 0}
.muted{color:var(--muted)}
.tiny{font-size:12px}

.form{display:grid;gap:12px}
.two-col{grid-template-columns:1fr 1fr}
.three-col{grid-template-columns:repeat(3,1fr)}
.four-col{grid-template-columns:repeat(4,1fr)}
.five-col{grid-template-columns:repeat(5,1fr)}
@media (max-width:1024px){.two-col,.three-col,.four-col,.five-col{grid-template-columns:1fr}}

.field label{display:block;font-size:13px;color:var(--muted);margin-bottom:8px}
input,select{width:100%;padding:14px 14px;border-radius:14px;border:1px solid rgba(255,255,255,.2);background:rgba(255,255,255,.08);color:#e2e8f0;outline:none;font-size:15px;line-height:1.2}
input::placeholder{color:#a7b0bd}
.select{min-width:160px}
.actions{display:flex;gap:10px;flex-wrap:wrap}

.btn{padding:12px 16px;border-radius:14px;border:1px solid transparent;cursor:pointer;font-weight:700;letter-spacing:.2px;font-size:14px}
.btn.primary{background:linear-gradient(180deg,var(--accent),var(--accent-600));color:#04210f}
.btn.secondary{background:rgba(255,255,255,.10);color:#e2e8f0;border-color:rgba(255,255,255,.18)}
.btn.danger{background:linear-gradient(180deg,#f87171,#ef4444);color:#2b0b0b}
.btn.ghost{background:transparent;border-color:rgba(255,255,255,.25);color:#cbd5e1}
.btn.tiny{padding:8px 10px;font-size:12px}
.btn:hover{filter:brightness(1.06)}
.table{margin-top:10px;border-top:1px solid rgba(255,255,255,.1)}
.row{display:grid;gap:10px;padding:12px 0;border-bottom:1px solid rgba(255,255,255,.08);align-items:center}
.row.head{font-weight:800;color:#e2e8f0}
.footer{max-width:980px;margin:30px auto 120px auto;padding:0 12px;text-align:center;color:#94a3b8}

/* Totales */
.cards-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}
@media (max-width:1000px){.cards-grid{grid-template-columns:1fr}}
.stat-card{display:flex;flex-direction:column;gap:8px;padding:16px;border-radius:16px;background:linear-gradient(180deg,rgba(255,255,255,.08),rgba(255,255,255,.04));border:1px solid rgba(255,255,255,.12);box-shadow:var(--shadow)}
.stat-head{display:flex;justify-content:space-between;align-items:center}
.stat-op{font-weight:800;font-size:14px;color:#c7d2fe}
.stat-saldo{font-weight:900;font-size:22px;color:#86efac}
.stat-row{display:flex;gap:10px;flex-wrap:wrap}
.badge{padding:6px 10px;border-radius:999px;background:rgba(255,255,255,.10);border:1px solid rgba(255,255,255,.14);font-size:12px;color:#e2e8f0}

/* Pager de meses al final */
.bottom-months{
  position:fixed; left:0; right:0; bottom:0; z-index:20;
  padding:10px 12px; background:linear-gradient(180deg,rgba(15,23,42,.2),rgba(15,23,42,.7));
  border-top:1px solid rgba(255,255,255,.14); backdrop-filter:blur(10px);
}
.month-pager{display:flex;align-items:center;justify-content:center;gap:10px}
.month-chip{padding:10px 12px;border-radius:999px;background:rgba(255,255,255,.10);border:1px solid rgba(255,255,255,.18);font-size:13px;white-space:nowrap}
.month-chip.active{background:linear-gradient(180deg,var(--accent),var(--accent-600));color:#04210f;border-color:transparent}
.month-arrow{min-width:42px}