*,
*::before,
*::after {
    box-sizing: border-box;
}

/* ==========================================================
   ACCESO
   ========================================================== */

.login {
    margin: 0;
    min-height: 100vh;
    background: var(--color-fondo);
}


/* ----------------------------------------------------------
   CONTENEDOR DEL LOGIN
   ---------------------------------------------------------- */

.login-capa {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;

    padding: 20px;

    box-sizing: border-box;
}

/* ----------------------------------------------------------
   CAJA DEL LOGIN
   ---------------------------------------------------------- */

.login-caja {
    width: 100%;
    max-width: 380px;

    padding: 35px;

    background: var(--color-blanco);

    border-radius: 12px;

    box-shadow:
        0 10px 30px var(--color-oscuro-12);

    text-align: center;

    animation: loginEntrada .30s ease-out;
}


/*
 * Animación de entrada de cada paso.
 *
 * Cuando PHP cambia de formulario, la nueva caja aparece
 * ligeramente desplazada hacia abajo y transparente.
 */

@keyframes loginEntrada {

    from {
        opacity: 0;
        transform: translateY(15px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }

}


/* ----------------------------------------------------------
   TÍTULO
   ---------------------------------------------------------- */

.login-caja h1 {
    margin: 0 0 10px 0;

    font-size: 25px;
    color: var(--color-texto);
}


/* ----------------------------------------------------------
   TEXTO
   ---------------------------------------------------------- */

.login-caja p {
    margin: 0 0 25px 0;

    color: var(--color-texto-secundario);
    line-height: 1.5;
}


/* ----------------------------------------------------------
   FORMULARIO
   ---------------------------------------------------------- */

.login-caja form {

    display: flex;
    flex-direction: column;

    gap: 12px;
}


/* ----------------------------------------------------------
   INPUTS
   ---------------------------------------------------------- */

.login-caja input {

    width: 260px;
    max-width: 100%;

    padding: 13px 14px;

    border: 1px solid var(--color-borde);
    border-radius: 7px;

    background: var(--color-blanco);

    font-family: inherit;
    font-size: 16px;

    outline: none;

    margin-left: auto;
    margin-right: auto;

    transition:
        border-color .20s ease,
        box-shadow .20s ease,
        background-color .20s ease;
}


.login-caja input:focus {

    border-color: var(--color-principal);

    background: var(--color-blanco);

    box-shadow:
        0 0 0 3px var(--color-principal-12);
}


/* ----------------------------------------------------------
   BOTÓN
   ---------------------------------------------------------- */

.login-caja button {

    width: 180px;
    max-width: 100%;

    padding: 13px;

    border: 0;
    border-radius: 7px;

    background: var(--color-principal);
    color: var(--color-blanco);

    font-family: inherit;
    font-size: 16px;
    font-weight: 600;

    cursor: pointer;

    margin-left: auto;
    margin-right: auto;

    transition:
        background-color .20s ease,
        transform .10s ease;
}


.login-caja button:hover {

    background: var(--color-principal);
}


.login-caja button:active {

    transform: scale(.98);
}


/* ----------------------------------------------------------
   PROBLEMAS CON EL ACCESO
   ---------------------------------------------------------- */

.login-ayuda {

    margin-top: 22px;

    padding-top: 18px;

    border-top: 1px solid var(--color-fondo);

    text-align: center;

    font-size: 14px;

    color: var(--color-texto-secundario);
}


.login-ayuda a {

    color: var(--color-principal);

    text-decoration: none;

    font-weight: 500;
}


.login-ayuda a:hover {

    text-decoration: underline;
}


/* ----------------------------------------------------------
   MENSAJE DE ERROR
   ---------------------------------------------------------- */

.login-mensaje {

    margin-bottom: 20px;

    padding: 11px 15px;

    background: var(--color-error-fondo);
    color: var(--color-error-texto);

    border: 1px solid var(--color-error-borde);

    border-radius: 7px;

    font-size: 14px;

    animation: mensajeEntrada .25s ease-out;

    transition:
        opacity .5s ease,
        transform .5s ease;
}
/*
 * Cuando JavaScript añade .ocultar,
 * el mensaje desaparece suavemente.
 */
.login-mensaje.ocultar {

    opacity: 0;

    transform: translateY(-8px);

}

@keyframes mensajeEntrada {

    from {
        opacity: 0;
        transform: translateY(-8px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }

}


/* ----------------------------------------------------------
   MÓVIL
   ---------------------------------------------------------- */

@media (max-width: 480px) {

    .login-capa {
        padding: 15px;
    }

    .login-caja {
        padding: 25px 20px;
    }

}