/* ============================================================
   NIU UI · Kit de diseño reutilizable
   Extraído del tablero "Eficiencia de Contenido".
   Úsalo en cualquier proyecto: <link rel="stylesheet" href="niu-ui.css">
   (Requiere el archivo bg.svg junto a este CSS para el fondo.)
   ============================================================ */

/* ---------- Tokens (colores, sombras, radios) ---------- */
:root{
  --bg:#f5f6f8;          /* fondo base */
  --bg2:#eef1f5;         /* gris muy claro (chips, pistas) */
  --card:#ffffff;        /* tarjetas */
  --ink:#0f172a;         /* texto principal */
  --muted:#64748b;       /* texto secundario */
  --line:#e7eaef;        /* bordes */
  --line2:#eef1f5;       /* bordes suaves / divisores */
  --brand:#2f5bea;       /* azul Niu */
  --brand-2:#6d5efc;     /* violeta (degradados del logo) */
  --brand-soft:#eaf0ff;  /* azul muy claro (focus) */
  --ok:#16a34a;          /* verde */
  --warn:#f59e0b;        /* ámbar */
  --danger:#ef4444;      /* rojo */
  /* paleta para categorías/series (equipos, fases, etc.) */
  --c1:#2f5bea; --c2:#8b5cf6; --c3:#0ea5e9; --c4:#16a34a; --c5:#f59e0b;
  --shadow:0 1px 2px rgba(16,24,40,.04), 0 10px 30px rgba(16,24,40,.06);
  --radius:18px;
  --font:'Segoe UI',system-ui,-apple-system,Roboto,Helvetica,Arial,sans-serif;
}

/* ---------- Base ---------- */
*{box-sizing:border-box;margin:0;padding:0}
body{
  font-family:var(--font); color:var(--ink);
  background:#ffffff url('bg.svg') center center / cover fixed no-repeat;
  min-height:100vh; padding:32px 24px 64px;
  -webkit-font-smoothing:antialiased;
}
.wrap{max-width:1180px;margin:0 auto}          /* contenedor centrado */
a{color:var(--brand)}

/* ---------- Encabezado ---------- */
.niu-top{display:flex;flex-wrap:wrap;align-items:flex-end;justify-content:space-between;gap:18px;margin-bottom:22px}
.niu-brand{display:flex;align-items:center;gap:13px}
.niu-logo{width:42px;height:42px;border-radius:12px;background:linear-gradient(135deg,var(--brand),var(--brand-2));
  display:flex;align-items:center;justify-content:center;color:#fff;font-weight:800;font-size:19px;
  box-shadow:0 6px 16px rgba(47,91,234,.35)}
.niu-top h1{font-size:22px;font-weight:700;letter-spacing:-.02em}
.niu-sub{color:var(--muted);font-size:13px;margin-top:2px}

/* ---------- Controles (filtros, botones, inputs) ---------- */
.niu-controls{display:flex;align-items:flex-end;gap:10px;flex-wrap:wrap}
.niu-field{display:flex;flex-direction:column;gap:4px}
.niu-field label{font-size:11px;color:var(--muted);font-weight:600;letter-spacing:.03em;text-transform:uppercase;padding-left:2px}
select,input,.niu-input{border:1px solid var(--line);background:#fff;border-radius:10px;padding:8px 11px;
  font-size:13px;color:var(--ink);font-family:inherit}
select:focus,input:focus{outline:none;border-color:var(--brand);box-shadow:0 0 0 3px var(--brand-soft)}
.niu-btn{border:1px solid var(--line);background:#fff;border-radius:10px;padding:9px 14px;font-size:13px;font-weight:600;
  color:var(--ink);cursor:pointer;transition:.15s;font-family:inherit;display:inline-flex;align-items:center;gap:7px;text-decoration:none}
.niu-btn:hover{border-color:var(--brand);color:var(--brand)}
.niu-btn.primary{background:var(--brand);color:#fff;border-color:var(--brand)}
.niu-btn.primary:hover{background:#2449c9;color:#fff}

/* ---------- Navegación por pestañas ---------- */
.niu-tabs{display:flex;gap:6px;margin-bottom:20px;border-bottom:1px solid var(--line);flex-wrap:wrap}
.niu-tabs a{padding:10px 16px;font-size:13.5px;font-weight:600;color:var(--muted);text-decoration:none;
  border-bottom:2px solid transparent;margin-bottom:-1px}
.niu-tabs a:hover{color:var(--ink)}
.niu-tabs a.active{color:var(--brand);border-bottom-color:var(--brand)}

/* ---------- Tarjetas ---------- */
.niu-card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);
  box-shadow:var(--shadow);padding:20px 22px;margin-bottom:20px}
.niu-card h3{font-size:15px;font-weight:700;margin-bottom:4px}
.niu-hint{font-size:12px;color:var(--muted);margin-bottom:16px}

/* Tarjeta destacada / narrativa (storytelling) */
.niu-lead{background:linear-gradient(180deg,#fff,#fbfcff);border:1px solid var(--line);border-left:5px solid var(--brand);
  border-radius:var(--radius);box-shadow:var(--shadow);padding:18px 22px;margin-bottom:20px;
  font-size:15.5px;line-height:1.55;color:#1f2937}
.niu-lead .eyebrow{font-size:11px;font-weight:700;letter-spacing:.1em;text-transform:uppercase;color:var(--brand);margin-bottom:6px}

/* ---------- KPIs / stat tiles ---------- */
.niu-stats{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;margin-bottom:20px}
@media(max-width:820px){.niu-stats{grid-template-columns:repeat(2,1fr)}}
.niu-stat{background:var(--card);border:1px solid var(--line);border-radius:14px;box-shadow:var(--shadow);padding:16px 18px}
.niu-stat .k{font-size:11px;color:var(--muted);font-weight:600;letter-spacing:.05em;text-transform:uppercase}
.niu-stat .v{font-size:28px;font-weight:800;margin-top:4px;letter-spacing:-.02em;font-variant-numeric:tabular-nums}
.niu-stat .n{font-size:12px;color:var(--muted);margin-top:2px}

/* ---------- Badges / pills ---------- */
.niu-badge{display:inline-flex;align-items:center;gap:6px;font-size:11px;font-weight:700;padding:3px 10px;border-radius:999px}
.niu-badge .dot{width:7px;height:7px;border-radius:50%}
.niu-badge.ok{background:#ecfdf3;color:var(--ok)}
.niu-badge.warn{background:#fffbeb;color:var(--warn)}
.niu-badge.danger{background:#fef2f2;color:var(--danger)}

/* ---------- Barras de progreso ---------- */
.niu-bar{height:7px;background:var(--line2);border-radius:5px;overflow:hidden}
.niu-bar>i{display:block;height:100%;border-radius:5px;background:var(--brand);transition:width .5s ease}

/* ---------- Tablas ---------- */
.niu-table{width:100%;border-collapse:collapse;font-size:12.5px}
.niu-table th,.niu-table td{padding:8px 8px;text-align:right;font-variant-numeric:tabular-nums}
.niu-table th:first-child,.niu-table td:first-child{text-align:left}
.niu-table thead th{color:var(--muted);font-size:10.5px;font-weight:700;letter-spacing:.03em;text-transform:uppercase;
  border-bottom:1px solid var(--line)}
.niu-table tbody tr{border-bottom:1px solid var(--line2)}
.niu-table tbody tr:last-child{border-bottom:none}

/* ---------- Utilidades ---------- */
.niu-scroll{overflow-x:auto}                     /* envuelve tablas/gráficas anchas */
.txt-ok{color:var(--ok)} .txt-warn{color:var(--warn)} .txt-danger{color:var(--danger)} .txt-muted{color:var(--muted)}
.niu-foot{color:#9aa4b2;font-size:12px;text-align:center;margin-top:26px}
.niu-cols{display:grid;grid-template-columns:1fr 1fr;gap:20px}
@media(max-width:820px){.niu-cols{grid-template-columns:1fr}}
.tabular{font-variant-numeric:tabular-nums}