*{box-sizing:border-box}body{margin:0;font-family:Arial,Helvetica,sans-serif;background:#0f172a;color:#0f172a}
.auth-shell{min-height:100vh;display:flex;align-items:center;justify-content:center;background:linear-gradient(135deg,#0f172a,#1e293b)}
.auth-card{width:min(480px,92vw);background:#fff;padding:32px;border-radius:20px;box-shadow:0 20px 60px rgba(0,0,0,.35)}
.brand,.logo{font-size:28px;font-weight:800;letter-spacing:2px;color:#16a34a}
.login-form{display:flex;flex-direction:column;gap:10px;margin-top:20px}
.login-form input,.login-form button,.filters select{padding:12px 14px;border-radius:12px;border:1px solid #cbd5e1}
.login-form button{background:#16a34a;color:#fff;font-weight:700;cursor:pointer}
.alert{padding:12px;border-radius:12px;background:#fee2e2;color:#991b1b;margin-top:12px}
.app-shell{display:grid;grid-template-columns:260px 1fr;min-height:100vh}
.sidebar{background:#020617;color:#fff;padding:24px;display:flex;flex-direction:column}
.sidebar nav{display:flex;flex-direction:column;gap:8px;margin-top:24px}
.sidebar a{color:#cbd5e1;text-decoration:none;padding:12px 14px;border-radius:12px}
.sidebar a.active,.sidebar a:hover{background:#1e293b;color:#fff}
.main{padding:24px;background:#f8fafc}
.topbar{display:flex;justify-content:space-between;align-items:end;gap:12px;margin-bottom:20px}
.filters{display:flex;gap:12px;flex-wrap:wrap}
.filters label{font-size:12px;color:#475569;display:flex;flex-direction:column;gap:6px}
.card-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(190px,1fr));gap:16px}
.metric-card,.panel{background:#fff;border-radius:18px;padding:18px;box-shadow:0 10px 30px rgba(15,23,42,.08)}
.metric-card h3{margin:0 0 8px;font-size:14px;color:#475569}
.metric-card strong{font-size:28px;color:#0f172a}
.split{display:grid;grid-template-columns:1fr 1fr;gap:16px;margin-top:16px}
.kpi-row{display:flex;justify-content:space-between;padding:10px 0;border-bottom:1px solid #e2e8f0}
.tab{display:none}.tab.active{display:block}
.table-wrap{overflow:auto}
table{width:100%;border-collapse:collapse;font-size:14px}
th,td{padding:10px 12px;border-bottom:1px solid #e2e8f0;text-align:left;white-space:nowrap}
th{background:#f8fafc;position:sticky;top:0}
.badge{padding:6px 10px;border-radius:999px;font-size:12px;font-weight:700}
.badge.pago{background:#dcfce7;color:#166534}
.badge.vencido{background:#fee2e2;color:#991b1b}
.badge.avencer{background:#fef3c7;color:#92400e}
small.muted{color:#64748b}
@media (max-width:980px){.app-shell{grid-template-columns:1fr}.sidebar{position:sticky;top:0;z-index:10}.split{grid-template-columns:1fr}.topbar{flex-direction:column;align-items:start}}