* { box-sizing: border-box; }
body {
    margin: 0;
    font-family: Arial, sans-serif;
    background: #ffffff;
    color: #222;
}
a { color: #1a4fa3; }
.menu {
    width: 380px;
    max-width: 95%;
    margin: 55px auto;
    border-collapse: collapse;
    border: 1px solid #000;
}
.menu td { border: 1px solid #000; }
.menu .titulo {
    background: #bcd6f7;
    text-align: center;
    padding: 25px 10px;
    font-size: 24px;
    font-weight: bold;
}
.menu .opcion { background: #d9d9d9; text-align: center; padding: 13px; }
.menu .opcion a { color: #1a4fa3; font-weight: bold; text-decoration: none; }
.menu .opcion a:hover { text-decoration: underline; }
.cuadro {
    width: 900px;
    max-width: 95%;
    margin: 25px auto;
    background: #eaf2fb;
    border: 2px solid #2b6cb0;
    border-radius: 8px;
    padding: 20px;
}
.cuadro.pequeno { width: 520px; }
.cuadro h1, .cuadro h2, .cuadro h3 { color: #2b6cb0; text-align: center; margin-top: 0; }
.tabla { width: 100%; border-collapse: collapse; background: #fff; }
.tabla, .tabla td, .tabla th { border: 1px solid #2b6cb0; }
.tabla td, .tabla th { padding: 8px; }
.tabla th { background: #2b6cb0; color: #fff; }
.formulario { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 10px; }
.campo { display: flex; flex-direction: column; gap: 4px; }
.campo.full { grid-column: 1 / -1; }
input, select, textarea { width: 100%; padding: 8px; border: 1px solid #aaa; border-radius: 4px; }
button, input[type="submit"], .boton {
    display: inline-block;
    background: #2b6cb0;
    color: #fff;
    border: 0;
    padding: 8px 13px;
    border-radius: 4px;
    cursor: pointer;
    text-decoration: none;
}
button:hover, input[type="submit"]:hover, .boton:hover { background: #1e4e8c; }
.boton.secundario { background: #777; }
.boton.danger { background: #b42318; }
.acciones { display: flex; flex-wrap: wrap; gap: 7px; margin: 12px 0; align-items: center; }
.navegacion { text-align: center; margin: 15px 0; }
.alerta { padding: 10px; border: 1px solid #777; background: #fff; margin-bottom: 12px; }
.exito { border-color: #2e7d32; }
.error { border-color: #b42318; }
.resumen { display: grid; grid-template-columns: repeat(4, 1fr); gap: 10px; margin-bottom: 18px; }
.tarjeta { background: #fff; border: 1px solid #2b6cb0; border-radius: 6px; padding: 12px; text-align: center; }
.tarjeta strong { display: block; font-size: 20px; color: #2b6cb0; margin-top: 5px; }
.total { font-size: 20px; font-weight: bold; color: #2b6cb0; text-align: right; }
.login { width: 420px; max-width: 95%; margin: 80px auto; }
.linea-factura td { vertical-align: top; }
@media (max-width: 700px) {
    .formulario, .resumen { grid-template-columns: 1fr; }
    .tabla { font-size: 13px; }
}
@media print {
    .no-print { display: none !important; }
    body { background: #fff; }
    .cuadro { border: 0; width: 100%; max-width: 100%; margin: 0; padding: 0; background: #fff; }
}