: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;font-size:15px;}
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;}
#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}

#notaParametro{padding:0 var(--gap);margin:10px 0 0 0;}
#span1{display:inline-block;font-size:14px;font-weight:800;color:var(--muted);padding:6px 10px;border-radius:var(--radius-sm);background:var(--panel);border:1px solid var(--border);box-shadow:0 2px 10px rgba(0,0,0,.03);text-align:center;}

#contenedor{min-height:calc(100vh - 76px);width:100%;padding:var(--gap);display:flex;flex-direction:column;gap:var(--gap);}
#caja1,#caja2,#caja3{background:var(--panel);border:1px solid var(--border);border-radius:var(--radius);box-shadow:var(--shadow);padding:10px;min-width:0;}
#titulo3{font-size:12px;font-weight:900;color:var(--muted);letter-spacing:.6px;text-transform:uppercase;margin:2px 0 0 0;padding:0 2px;}
#contenedorCaja3{display:block}

#caja3{display:flex;flex-wrap:wrap}
#caja31{margin:10px}

h3{margin:0;padding:0;font-size:20px}
h4{font-size:12px;font-weight:900;color:var(--muted);letter-spacing:.6px;text-transform:uppercase;margin:6px 0 4px 0;}

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

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)}
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}

.mjx-math{font-size:14px;font-family:monospace}
.katex .op-limits>.vlist-t{text-align:center;font-weight:600}

@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{min-height:calc(100vh - 76px)}
}