/* === Reset básico === */
body {
    margin: 0;
    background-color: #ffffff;
    color: #666;
    font-family: sans-serif;
    font-size: 12px;
}

/* === Cabecera === */
#cabecera {
    padding: 6px 6px 8px;
    background-color: #155ef0;
    color: #fff;
}

#cabecera h1,
#cabecera h2 {
    margin: 0;
}

/* === Menú de navegación === */
#menu {
    background-color: #000;
    color: #fff;
    padding: 4px 0;
}

#menu a {
    display: inline-block;
    width: 100px;
    background-color: #000;
    padding: 4px 8px;
    color: #f4f4f4;
    text-decoration: none;
    font-size: 13px;
    font-weight: bold;
    transition: background-color 0.3s ease;
}

#menu a:hover {
    background-color: #6699FF;
    color: #fff;
}

/* === Mensaje destacado === */
#mensaje {
    margin: 20px;
    border: 1px solid #990033;
    background-color: #f4f4f4;
    padding: 8px;
    color: #990033;
    font-size: 15px;
    font-weight: bold;
    text-align: justify;
}

/* === Formulario === */
#formulario {
    margin: 0 20px 10px;
    border: 1px solid #c0c0c0;
    background-color: #f9f9f9;
    padding: 8px;
    text-align: left;
}

.item_requerid {
    width: 150px;
    height: 22px;
    padding-right: 4px;
    font-weight: bold;
    float: left;
    clear: left;
    text-align: right;
}

.form_requerid {
    height: 22px;
    float: left;
    clear: right;
}

input {
    border: 1px solid #c0c0c0;
    padding: 4px;
    font-size: 12px;
}

.form_button {
    padding-top: 15px;
    margin-left: 154px;
    clear: both;
}

/* === Botón enviar === */
#enviar {
    padding: 6px 12px;
    border: 2px solid #fff;
    background-color: #000;
    color: #fff;
    font-family: sans-serif;
    font-size: 14px;
    font-weight: bold;
    cursor: pointer;
    transition: background-color 0.3s ease;
}

#enviar:hover {
    background-color: #6699FF;
}