: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;
}

a{color:var(--accent);text-decoration:none}
a:hover{text-decoration:underline}

h1,h2,h3,h4,p{margin:0}

#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 14px 325px;
}

#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{
  height:calc(100vh - 76px);width:100%;
  padding:var(--gap);display:flex;flex-direction:column;gap:var(--gap);
}

#caja1{
  display:flex;gap:var(--gap);width:100%;
  min-height:290px;flex:0 0 auto;
}

#caja11,#caja12{
  background:var(--panel);border:1px solid var(--border);border-radius:var(--radius);
  box-shadow:var(--shadow);padding:10px;flex:1;min-width:0;
}

#caja111{
  display:flex;gap:var(--gap);align-items:stretch;margin-bottom:8px;
}

#caja1111{
  width:38%;min-width:220px;background:linear-gradient(135deg,#0f172a,#1f2937);
  color:white;border-radius:var(--radius-sm);border:1px solid #0b1020;
  padding:10px;display:flex;flex-direction:column;justify-content:space-between;
}

#caja11112{
  display:flex;justify-content:center;align-items:center;text-align:center;
  font-size:14px;font-weight:800;letter-spacing:.6px;opacity:.95;min-height:22px;
}

#caja11112bis{
  margin-top:6px;font-size:11px;font-weight:700;color:#dbeafe;
  line-height:1.25;min-height:18px;
}

#caja1112{
  flex:1;background:var(--soft);border:1px dashed var(--border);
  border-radius:var(--radius-sm);display:flex;justify-content:center;
  align-items:center;padding:8px;min-width:0;
}

#caja112{
  display:flex;gap:var(--gap);align-items:stretch;min-height:190px;
}

#caja1121,#caja1122{
  background:linear-gradient(180deg,#ffffff,var(--soft));
  border:1px solid var(--border);border-radius:var(--radius-sm);
  padding:8px;flex:1;min-width:0;display:flex;align-items:center;justify-content:center;
}

#caja11221{width:100%;height:auto;display:block}

#caja121{display:flex;align-items:center;justify-content:center;margin-bottom:8px}

#caja122{
  background:var(--soft);border:1px solid var(--border);border-radius:var(--radius-sm);
  padding:8px;font-size:13px;margin-bottom:8px;
}

#caja1221,#caja1221bis,#caja1222,#caja1222bis,#caja1223,#caja1224,#caja1225,#caja1226{
  display:flex;align-items:center;gap:8px;padding:6px 4px;
  border-bottom:1px solid #e5e7eb;
}

#caja1226{border-bottom:0}
#caja1227{display:flex;justify-content:space-between;align-items:center;gap:8px;padding-top:8px}

#caja123{
  background:var(--panel);border:1px solid var(--border);border-radius:var(--radius-sm);
  padding:8px;font-size:13px;margin-bottom:8px;min-height:56px;
}

#caja1231,#caja1232,#caja1233,#caja1234,#caja1235,#caja1236{
  display:flex;align-items:center;gap:8px;padding:4px 0;
}

#caja124a{height:4px}

#caja124b{
  display:flex;justify-content:flex-end;gap:8px;align-items:center;
  padding:2px 0 8px 0;
}

#caja1241{width:60%;color:var(--muted);font-size:12px;font-weight:700}
#caja1242{width:38%}

#caja125{
  display:flex;justify-content:space-between;align-items:center;gap:8px;
  border-top:1px solid #e5e7eb;padding-top:8px;
}

#caja1251{font-size:12px;font-weight:800;color:#b91c1c;min-height:18px}
#caja1252{display:flex;justify-content:flex-end;gap:8px}

#caja2borde{
  background:transparent;flex:1;min-height:220px;display:block;
}

#caja2{
  height:100%;background:var(--panel);border:1px solid var(--border);
  border-radius:var(--radius);box-shadow:var(--shadow);padding:10px;display:block;
}

h4{
  font-size:12px;font-weight:900;color:var(--muted);
  letter-spacing:.6px;text-transform:uppercase;margin:6px 0 4px 0;
}

#caja21{
  min-height:42%;border:1px solid var(--border);border-radius:var(--radius-sm);
  background:linear-gradient(180deg,#fff,var(--soft));
  margin:4px 0 10px 0;padding:8px;display:flex;flex-wrap:wrap;
  align-items:center;gap:6px;overflow-x:auto;
}

#caja211{display:flex;flex-wrap:wrap;align-items:center;gap:6px}

#caja22{
  min-height:42%;border:1px solid var(--border);border-radius:var(--radius-sm);
  background:linear-gradient(180deg,#fff,var(--soft));
  padding:8px;display:block;
}

#caja221{
  height:88%;display:flex;align-items:center;flex-direction:row;flex-wrap:wrap;
  gap:6px;overflow-x:auto;
}

#caja222{height:auto;display:flex;justify-content:flex-end;padding-top:6px}

table{table-layout:auto;border-spacing:7px;font-size:14px;margin:0;padding:0}
td{padding:0 3px;text-align:right}

input{
  width:30px;padding:4px 6px;border:1px solid var(--border);
  border-radius:6px;background:white;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)}
#inputlargo5,#inputlargo6{width:110px}
#inputlargo7{width:160px}
#inputlargo8{width:150px}
#inputcorto1,#inputcorto2,#inputcorto3,#inputcorto4,#inputcorto5,#inputcorto6,#inputcorto7{width:25px}

label{margin-right:10px}

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)}

#botonautomatico{
  background:linear-gradient(90deg,var(--accent),var(--accent-2));
  color:white;border-color:transparent;
}

#botonautomatico:hover{filter:brightness(1.03)}

.ventana{
  display:none;position:fixed;top:0;left:0;width:100%;height:100%;
  background-color:rgba(0,0,0,0.55);justify-content:center;align-items:center;
  z-index:1000;padding:14px;
}

.contenidoVentana{
  background-color:white;padding:18px;border-radius:var(--radius);
  width:min(900px,92vw);text-align:center;position:relative;
  box-shadow:0 18px 50px rgba(0,0,0,.22);
}

.contenidoVentana h2{font-size:18px;font-weight:900;margin-bottom:10px}

.cierraVentana{
  position:absolute;top:10px;right:12px;font-size:22px;cursor:pointer;
  width:32px;height:32px;display:flex;align-items:center;justify-content:center;
  border-radius:50%;background:var(--soft);border:1px solid var(--border);
}

iframe{border:none}

.katex .op-limits>.vlist-t{text-align:center;font-weight:600}

@media (max-width: 1100px){
  #caja1{flex-direction:column}
  #caja1111{width:100%;min-width:0}
}

@media (max-width: 700px){
  #tituloinicial{flex-direction:column;align-items:stretch}
  #tituloinicial h1{justify-content:flex-start;text-align:left}
  #controlesTop{justify-content:flex-end}
  #contenedor{height:auto;min-height:calc(100vh - 76px)}
}

#marcoEntrada{
  gap:0px !important;
}
#marcoEntrada > *{
  margin:0 !important;
  padding:0 !important;
}

.inputExpresion{
  width:260px;max-width:100%;
}
.Ayuda{
font-family:Arial,Helvetica,sans-serif;
font-size:15px;
line-height:1.6;
color:#222;
}