/* Diseño simple para la tienda / fiados */
body {
    font-family: Arial, Helvetica, sans-serif;
    font-size: 14px;
    color: #222;
    background: #f5f5f5;
    margin: 0;
    padding: 12px;
    line-height: 1.4;
}

.pagina {
    max-width: 720px;
    margin: 0 auto;
    background: #fff;
    border: 1px solid #ccc;
    padding: 16px 20px 24px;
}

h1 {
    font-size: 18px;
    margin: 0 0 8px;
    font-weight: bold;
}

.subtitulo {
    margin: 0 0 16px;
    color: #444;
    font-size: 13px;
}

.barra-pestanas {
    display: flex;
    flex-wrap: wrap;
    gap: 4px;
    margin-bottom: 12px;
    padding-bottom: 8px;
    border-bottom: 1px solid #999;
}

.pestaña-enlace {
    display: inline-block;
    padding: 5px 10px;
    border: 1px solid #888;
    background: #eee;
    color: #222;
    text-decoration: none;
    font-size: 13px;
}

.pestaña-enlace:hover {
    background: #e0e0e0;
}

.pestaña-enlace-activa {
    background: #fff;
    border-bottom: 1px solid #fff;
    margin-bottom: -9px;
    padding-bottom: 9px;
    font-weight: bold;
}

.panel-oculto {
    display: none;
}

.panel h2 {
    margin-top: 4px;
}

#panel-clientes .texto-ayuda-pestaña {
    margin: 0 0 10px;
    font-size: 13px;
    color: #444;
}

#panel-clientes .subtitulo-seccion-clientes {
    margin-top: 1.25rem;
}

#panel-clientes .subtitulo-seccion-clientes:first-of-type {
    margin-top: 0;
}

#panel-clientes .resumen-listado-clientes {
    margin-top: 14px;
    font-size: 13px;
    color: #333;
}

h2 {
    font-size: 15px;
    margin: 20px 0 8px;
    border-bottom: 1px solid #999;
    padding-bottom: 4px;
}

fieldset {
    border: 1px solid #bbb;
    margin: 0 0 14px;
    padding: 10px 12px;
}

legend {
    font-weight: bold;
    padding: 0 6px;
}

label {
    display: block;
    margin: 6px 0 2px;
}

input[type="text"],
input[type="number"],
input[type="password"] {
    width: 100%;
    max-width: 320px;
    padding: 4px 6px;
    box-sizing: border-box;
    border: 1px solid #888;
}

button {
    margin-top: 10px;
    padding: 5px 12px;
    cursor: pointer;
}

.aviso {
    padding: 8px 10px;
    margin-bottom: 14px;
    border: 1px solid #888;
    background: #fafafa;
}

.aviso-ok {
    border-color: #5a5;
    background: #efe;
}

.aviso-error {
    border-color: #a55;
    background: #fee;
}

table {
    border-collapse: collapse;
    width: 100%;
    margin-top: 8px;
}

th, td {
    border: 1px solid #333;
    padding: 6px 8px;
    text-align: left;
}

th {
    background: #e8e8e8;
}

.vacio {
    color: #666;
    font-style: italic;
}

.subtitulo .enlace-cerrar {
    float: right;
}

.ayuda-detalle {
    font-size: 13px;
    color: #444;
    margin: 8px 0 12px;
}

.tabla-resumen-cuenta {
    max-width: 520px;
    margin-bottom: 20px;
}

.tabla-resumen-cuenta th {
    width: 44%;
    text-align: left;
    background: #f0f0f0;
}

.pie {
    margin-top: 24px;
    font-size: 12px;
    color: #666;
}