:root{--bg:#f5f7fb;--panel:#ffffff;--ink:#111827;--muted:#6b7280;--accent:#2563eb;--accent-2:#0ea5a4;--border:#d1d5db;--soft:#eef2f7;--shadow:0 6px 18px rgba(0,0,0,.08);--radius:12px;--radius-sm:8px;--gap:10px;}
*{box-sizing:border-box}
body{margin:0;padding:0;background:linear-gradient(180deg,var(--bg),#ffffff);color:var(--ink);font-family:system-ui,-apple-system,Segoe UI,Roboto,Arial,monospace;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;text-rendering:optimizeLegibility;}
a{color:var(--accent);text-decoration:none}a:hover{text-decoration:underline}
h1,h2,h3,h4,p{margin:0}

/* ── BARRA SUPERIOR ── */
#tituloinicial{position:sticky;top:0;z-index:10;background:var(--panel);border-bottom:1px solid var(--border);box-shadow:0 2px 10px rgba(0,0,0,.04);display:flex;align-items:center;justify-content:space-between;gap:24px;padding:14px 18px;}
#tituloinicial h1{font-size:18px;font-weight:800;letter-spacing:.2px;line-height:1.2;flex:1;display:flex;justify-content:center;text-align:center;}
#controlesTop{display:flex;align-items:center;gap:18px}
.abreVentana{font-size:14px;font-weight:700;padding:8px 10px;border-radius:var(--radius-sm);background:var(--soft);border:1px solid var(--border);}
#btnHome{display:inline-flex;flex-direction:column;align-items:center;justify-content:center;width:46px;height:50px;background:var(--soft);border:1px solid var(--border);border-radius:10px;gap:2px;transition:.15s transform,.15s background;}
#btnHome:hover{transform:translateY(-1px);background:#e9eef9}
#btnHome svg{display:block;fill:var(--ink)}
#btnHome span{font-size:9px;line-height:9px;color:var(--ink);font-weight:800;letter-spacing:.5px}

/* ── CONTENEDOR PRINCIPAL ── */
#contenedor{height:calc(100vh - 76px - var(--footer-h,74px));width:100%;padding:var(--gap);display:flex;flex-direction:column;gap:var(--gap);}

/* ── FILA SUPERIOR: caja1 ── */
#caja1{display:flex;gap:var(--gap);width:100%;min-height:300px;flex:0 0 auto;}

/* ── PANEL IZQUIERDO (caja11): entrada de datos ── */
#caja11{background:var(--panel);border:1px solid var(--border);border-radius:var(--radius);box-shadow:var(--shadow);padding:10px;flex:0 0 44%;min-width:0;display:flex;flex-direction:column;gap:var(--gap);}

/* Cabecera izquierda */
#caja111{display:flex;gap:var(--gap);align-items:stretch;flex-shrink:0;}
#caja1111{width:42%;min-width:170px;background:linear-gradient(135deg,#0f172a,#1f2937);color:#fff;border-radius:var(--radius-sm);border:1px solid #0b1020;padding:10px;display:flex;flex-direction:column;justify-content:space-between;}
#caja11111{display:flex;justify-content:center;align-items:center;text-align:center;font-size:13px;font-weight:800;letter-spacing:.5px;opacity:.95;line-height:1.3;}
#caja11112{margin-top:8px;font-size:11px;font-weight:700;color:#dbeafe;line-height:1.3;min-height:22px;}

/* Zona de inputs de dimensiones (caja1112) */
#caja1112{flex:1;background:var(--soft);border:1px dashed var(--border);border-radius:var(--radius-sm);display:flex;flex-direction:column;justify-content:center;align-items:center;padding:8px 10px;min-width:0;gap:8px;}
.dim-fila{display:flex;align-items:center;gap:10px;flex-wrap:wrap;justify-content:center;}
.dim-campo{display:flex;flex-direction:column;align-items:center;gap:3px;}
.dim-campo span{font-size:11px;font-weight:700;color:var(--ink);}
.dim-campo small{font-size:10px;color:var(--muted);}

/* Zona de sistema/matrices (caja112) */
#caja112{flex:1;overflow:hidden;display:flex;flex-direction:column;gap:6px;}

/* Sistema inline: llave + tabla en la misma fila */
.sistema-inline{display:flex;align-items:center;gap:0px;overflow-x:auto;flex-wrap:nowrap;}
.sistema-inline>p{margin:0!important;flex-shrink:0;}
.sistema-inline>table{flex-shrink:0;}

/* Matrices post-confirmación — fila única */
.confirmados-fila{display:flex;align-items:flex-start;gap:8px;width:100%;overflow:hidden;}
.conf-blq{flex:1;min-width:0;overflow:hidden;}
.conf-vsep{width:1px;background:var(--border);align-self:stretch;flex-shrink:0;margin-top:14px;}
.mat-bloque{display:flex;flex-direction:column;gap:3px;flex-shrink:0;}
.mat-bloque-titulo{font-size:10px;font-weight:800;letter-spacing:.5px;text-transform:uppercase;color:var(--muted);}
.mat-bloque-contenido{display:flex;align-items:center;overflow:hidden;}
.confirmados-fila .katex{font-size:16px!important;}

/* ── PANEL DERECHO (caja12): ESPACIO DE RESULTADOS ── */
#caja12{background:var(--panel);border:1px solid var(--border);border-radius:var(--radius);box-shadow:var(--shadow);padding:10px;flex:1;min-width:0;display:flex;flex-direction:column;gap:8px;overflow-y:auto;}
#caja12-titulo{font-size:11px;font-weight:900;color:var(--muted);letter-spacing:.6px;text-transform:uppercase;flex-shrink:0;}

/* Indicador de pasos en caja12 */
#pasoIndicadorDer{display:flex;align-items:center;justify-content:space-around;gap:4px;padding:6px 8px;background:var(--soft);border-radius:var(--radius-sm);border:1px solid var(--border);flex-shrink:0;flex-wrap:wrap;}
.paso-ind-item{display:flex;flex-direction:column;align-items:center;gap:3px;cursor:default;flex:1;min-width:44px;}
.paso-num{width:22px;height:22px;border-radius:50%;background:#e5e7eb;border:2px solid var(--border);display:flex;align-items:center;justify-content:center;font-size:10px;font-weight:900;color:var(--muted);transition:.2s all;}
.paso-txt{font-size:9px;font-weight:700;color:var(--muted);text-align:center;line-height:1.2;letter-spacing:.2px;text-transform:uppercase;}
.paso-sep{color:#c4c9d4;font-size:14px;font-weight:700;align-self:center;margin-bottom:14px;}
.paso-ind-item.activo .paso-num{background:var(--accent);border-color:var(--accent);color:#fff;}
.paso-ind-item.activo .paso-txt{color:var(--accent);}
.paso-ind-item.completado .paso-num{background:#16a34a;border-color:#16a34a;color:#fff;}
.paso-ind-item.completado .paso-txt{color:#16a34a;}

/* Referencia en caja12 */
#refContenido{flex:1;display:flex;flex-direction:column;gap:8px;overflow-y:auto;}
.ref-titulo{font-size:11px;font-weight:800;letter-spacing:.5px;text-transform:uppercase;color:var(--muted);}
.ref-mat{overflow-x:auto;padding:6px 0;display:flex;justify-content:center;align-items:center;}
.ref-nota{font-size:11px;color:var(--muted);padding:6px 10px;background:var(--soft);border-radius:6px;border:1px solid var(--border);line-height:1.5;}
.ref-rangos{display:flex;gap:10px;flex-wrap:wrap;}
.ref-rango-badge{padding:4px 12px;border-radius:999px;font-size:12px;font-weight:800;background:var(--accent);color:#fff;}
.ref-vacia{display:flex;align-items:center;justify-content:center;min-height:100px;color:var(--muted);font-size:13px;font-style:italic;}

/* ── ESPACIO DE TRABAJO (caja2): rejilla 2 columnas ── */
#caja2borde{background:transparent;flex:1;min-height:200px;display:block;overflow:hidden;}
#caja2{height:100%;background:var(--panel);border:1px solid var(--border);border-radius:var(--radius);box-shadow:var(--shadow);padding:10px;display:flex;flex-direction:column;overflow:hidden;}
h4{font-size:12px;font-weight:900;color:var(--muted);letter-spacing:.6px;text-transform:uppercase;margin:0 0 6px;display:block;flex-shrink:0;}
#historial{flex:1;overflow-y:auto;padding:2px 4px;display:grid;grid-template-columns:1fr 1fr;gap:8px;align-content:start;}

/* ── TARJETAS DEL HISTORIAL ── */
.hist-entrada{background:#fff;border:1px solid var(--border);border-radius:var(--radius-sm);padding:10px 12px;}
.hist-etiqueta{font-size:10px;font-weight:800;letter-spacing:.6px;text-transform:uppercase;color:var(--muted);margin-bottom:6px;}
.hist-valor{display:block;margin:4px 0;overflow-x:auto;}
.hist-info{font-size:11px;color:var(--muted);margin:5px 0 2px;}
.hist-info strong{color:var(--ink);}
.hist-maxord{color:var(--accent);font-weight:700;}
.hist-vered{font-size:11px;font-weight:800;margin-top:5px;padding:3px 8px;border-radius:5px;display:inline-block;}

/* Tarjeta de menor */
.hist-nulo .hist-vered{background:#fef2f2;color:#dc2626;border:1px solid #fecaca;}
.hist-nonulo .hist-vered{background:#f0fdf4;color:#16a34a;border:1px solid #86efac;}

/* Tarjeta de rango confirmado */
.hist-rango-conf{background:linear-gradient(135deg,#f0fdf4,#dcfce7)!important;border-color:#86efac!important;}
.hist-badge-rango{font-size:15px;margin-top:6px;overflow-x:auto;}

/* Tarjeta de discusión */
.hist-discusion{background:linear-gradient(135deg,#f0f7ff,#e0f2fe)!important;border-color:#bfdbfe!important;}
.hist-disc-vals{margin:8px 0 4px;overflow-x:auto;}
.hist-disc-conclu{margin-top:8px;padding:8px 12px;border-radius:8px;font-size:12px;overflow-x:auto;}
.hist-tipo-incompatible{background:#fef2f2;border:1px solid #fecaca;color:#dc2626;}
.hist-tipo-cd{background:#f0fdf4;border:1px solid #86efac;color:#16a34a;}
.hist-tipo-ci{background:#eff6ff;border:1px solid #bfdbfe;color:#2563eb;}

/* Tarjeta de solución */
.hist-solucion{background:linear-gradient(135deg,#fafafa,#f1f5f9)!important;}
.hist-sol-cuerpo{margin-top:8px;overflow-x:auto;}

/* Tarjeta ACTIVA (formulario de trabajo) */
.hist-activa{border:2px solid var(--accent)!important;background:linear-gradient(135deg,#f0f7ff,#fff)!important;grid-column:span 1;}
.hist-activa .hist-etiqueta{color:var(--accent);}

/* Zona acumuladora de menores dentro de la tarjeta activa */
.form-res-area{display:flex;flex-direction:column;gap:5px;margin-bottom:6px;}
.form-menor-blq{padding:6px 8px;border-radius:6px;border-left:3px solid;}
.form-menor-nulo{background:#fef2f2;border-color:#fca5a5;}
.form-menor-nonulo{background:#f0fdf4;border-color:#86efac;}
.form-menor-hdr{font-size:10px;font-weight:800;letter-spacing:.4px;text-transform:uppercase;color:var(--muted);margin-bottom:3px;}
.form-menor-val{overflow-x:auto;margin-bottom:3px;}
.form-menor-val .katex{font-size:14px!important;}
.form-menor-inf{font-size:11px;font-weight:700;color:var(--muted);}
.form-menor-nonulo .form-menor-inf{color:#15803d;}
.form-menor-nulo .form-menor-inf{color:#dc2626;}

/* Botón resolución automática */
.btn-auto{width:100%;margin:4px 0 8px;padding:7px 10px;background:linear-gradient(135deg,#f59e0b,#d97706);color:#fff;border:none;border-radius:8px;font-size:12px;font-weight:800;cursor:pointer;letter-spacing:.3px;transition:.15s transform,.15s background;}
.btn-auto:hover{transform:translateY(-1px);background:linear-gradient(135deg,#fbbf24,#f59e0b);}
.btn-auto:active{transform:translateY(0);}

/* Toggle de modos */
.form-toggle{display:flex;gap:4px;margin-bottom:8px;}
.form-toggle-btn{flex:1;font-size:11px;font-weight:800;padding:5px 4px;border-radius:6px;background:var(--soft);border:1px solid var(--border);cursor:pointer;transition:.12s background,.12s color,.12s border-color;}
.form-toggle-btn.activo{background:var(--accent);color:#fff;border-color:var(--accent);}
.form-toggle-btn:not(.activo):hover{background:#e9eef9;}

/* Contenido de tarjeta activa */
.form-seccion{padding:4px 0;}
.form-row{display:flex;align-items:center;gap:6px;flex-wrap:wrap;}
.form-row label{font-size:12px;font-weight:700;color:var(--ink);}
.form-msg{font-size:12px;font-weight:800;margin-top:6px;min-height:18px;line-height:1.4;}
.form-msg .ok{color:#16a34a;}
.form-msg .err{color:#dc2626;}
.form-msg .cierto{color:#16a34a;font-size:14px;letter-spacing:.5px;}
.form-msg .falso{color:#dc2626;font-size:14px;letter-spacing:.5px;}
.input-indices{width:90px!important;}

/* Selector de filas/columnas con botones chip */
.form-picker-row{display:flex;align-items:center;gap:5px;flex-wrap:wrap;margin-bottom:5px;}
.form-picker-label{font-size:11px;font-weight:700;color:var(--muted);min-width:38px;}
.form-picker-btn{width:26px;height:26px;border-radius:6px;border:1.5px solid var(--border);background:var(--soft);font-size:11px;font-weight:700;cursor:pointer;transition:.1s background,.1s color,.1s border-color;color:var(--ink);padding:0;line-height:26px;text-align:center;}
.form-picker-btn.sel{background:var(--accent);color:#fff;border-color:var(--accent);}
.form-picker-btn:hover:not(.sel){background:#e9eef9;}
.form-picker-hint{font-size:11px;color:var(--muted);margin-top:4px;min-height:16px;font-weight:600;}

/* ── TABLAS DE ENTRADA ── */
table{table-layout:auto;border-spacing:4px;font-size:12px;margin:0;padding:0}
td{padding:0 3px;text-align:right}
input{width:36px;padding:4px 6px;border:1px solid var(--border);border-radius:6px;background:#fff;font-weight:700;color:var(--ink);outline:none;transition:border-color .12s,box-shadow .12s;}
input:focus{border-color:var(--accent);box-shadow:0 0 0 3px rgba(37,99,235,.12)}
label{margin-right:4px;font-size:12px;font-weight:700;}
button{appearance:none;border:1px solid var(--border);background:var(--soft);padding:7px 10px;border-radius:8px;font-weight:800;font-size:12px;cursor:pointer;transition:.12s transform,.12s background,.12s border-color;}
button:hover{transform:translateY(-1px);background:#e9eef9;border-color:#c7d2fe}
button:active{transform:translateY(0)}

/* ── KATEX ── */
#calculadora .katex{font-size:16px;}
#caja112 .katex{font-size:16px;}
#historial .katex{font-size:16px;}
#caja12 .katex{font-size:16px;}
#calculadora .katex .mrel{font-size:1em;}

/* ── FOOTER ── */
.siteFooter{background:var(--panel);border-top:1px solid var(--border);padding:14px 24px;}
.footerInner{display:flex;gap:18px;justify-content:center;flex-wrap:wrap;}
.footerInner a{font-size:12px;color:var(--muted);text-decoration:none;}
.footerInner a:hover{color:var(--accent);}

/* ── RESPONSIVE ── */
@media(max-width:1100px){
  #caja1{flex-direction:column;min-height:auto;}
  #caja12{min-height:160px;}
  #caja11{flex:none;}
}
@media(max-width:700px){
  #tituloinicial{flex-direction:column;align-items:stretch;padding:8px 12px;}
  #controlesTop{justify-content:flex-end;}
  #tituloinicial h1{font-size:14px;text-align:left;justify-content:flex-start;}
  #caja111{flex-direction:column;}
  #caja1111{width:100%;min-width:0;}
  #historial{grid-template-columns:1fr;}
  .paso-txt{display:none;}
}