/* Fondo general */
body {
    background: url("../assets/fondo_login.jpg") no-repeat center center fixed;
    background-size: cover;
    height: 100vh;
    margin: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
}

/* Capa oscura detrás del contenido */
body::before {
    content: "";
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0,0,0,0.45);
    z-index: 1;
}

/* Caja del login/logout */
.auth-box {
    position: relative;
    z-index: 2;
    background: rgba(255, 255, 255, 0.92);
    padding: 40px;
    border-radius: 12px;
    box-shadow: 0 0 20px rgba(0,0,0,0.25);
    width: 100%;
    max-width: 380px;
    text-align: center;
}

/* Título */
.auth-title {
    font-weight: bold;
    margin-bottom: 20px;
}