/* =====================================================================
   PÁGINA DE LOGIN
   Fondo: Graduados.png con overlay azul marino semi-transparente.
   Tarjeta blanca centrada con logo + formulario.
   ===================================================================== */

.login-pagina {
    min-height: calc(100vh - 80px);
    background-image:
        linear-gradient(rgba(27, 59, 111, 0.85), rgba(20, 49, 92, 0.9)),
        url("../img/Graduados.png");
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    background-attachment: fixed;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 3rem 1.5rem;
}

/* ---------- Tarjeta blanca ---------- */
.login-tarjeta {
    background: white;
    border-radius: 20px;
    overflow: hidden;
    max-width: 520px;
    width: 100%;
    box-shadow: 0 25px 60px rgba(0, 0, 0, 0.45);
    padding: 3rem 2.75rem;
}

/* ---------- Marca institucional ---------- */
.login-tarjeta__marca {
    text-align: center;
    margin-bottom: 2rem;
    padding-bottom: 1.75rem;
    border-bottom: 2px solid var(--color-fondo-gris);
}

.login-tarjeta__marca img {
    height: 90px;
    display: block;
    margin: 0 auto 1.25rem;
}

.login-tarjeta__marca h2 {
    color: var(--color-azul-marino);
    font-size: 1.5rem;
    margin: 0 0 0.5rem;
    font-weight: 800;
}

.login-tarjeta__marca p {
    color: var(--color-texto-suave);
    font-size: 1rem;
    margin: 0;
}

/* ---------- Formulario ---------- */
.login-tarjeta__form {
    display: flex;
    flex-direction: column;
}

.login-mensajes {
    margin-bottom: 1.5rem;
}

.login-mensajes .aviso-borrador {
    display: block;
    width: 100%;
    margin-bottom: 0.75rem;
    font-size: 1rem;
    padding: 0.75rem 1rem;
    text-align: center;
}

.login-campo {
    text-align: left;
    margin-bottom: 1.5rem;
}

.login-campo label {
    display: block;
    font-weight: 700;
    margin-bottom: 0.4rem;
    font-size: 1.05rem;
    color: var(--color-texto);
}

.login-campo__ayuda {
    display: block;
    font-size: 0.88rem;
    color: var(--color-texto-suave);
    margin-bottom: 0.6rem;
    font-weight: 400;
    line-height: 1.4;
}

.login-campo input {
    width: 100%;
    padding: 1rem 1.1rem;
    border: 2px solid var(--color-borde);
    border-radius: 10px;
    font-size: 1.1rem;
    font-family: var(--fuente-texto);
    transition: border-color 0.2s, box-shadow 0.2s;
    background: white;
}

.login-campo input:focus {
    outline: none;
    border-color: var(--color-azul-marino);
    box-shadow: 0 0 0 4px rgba(27, 59, 111, 0.12);
}

/* ---------- Botón ---------- */
.login-boton {
    width: 100%;
    background: var(--color-azul-marino);
    color: white;
    border: none;
    padding: 1.15rem;
    border-radius: 10px;
    font-weight: 800;
    font-size: 1.2rem;
    cursor: pointer;
    transition: all 0.2s ease;
    margin-top: 0.75rem;
    font-family: var(--fuente-texto);
}

.login-boton:hover {
    background: var(--color-azul-marino-oscuro);
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(27, 59, 111, 0.3);
}

/* ---------- Volver al inicio ---------- */
.login-volver {
    display: block;
    margin-top: 1.5rem;
    font-size: 1rem;
    color: var(--color-texto-suave);
    text-align: center;
    text-decoration: none;
    font-weight: 600;
    transition: color 0.2s;
}

.login-volver:hover {
    color: var(--color-azul-marino);
    text-decoration: underline;
}

/* ---------- Responsive ---------- */
@media (max-width: 640px) {
    .login-pagina {
        padding: 2rem 1rem;
        background-attachment: scroll;
    }
    .login-tarjeta {
        padding: 2rem 1.5rem;
    }
    .login-tarjeta__marca img {
        height: 70px;
    }
    .login-tarjeta__marca h2 {
        font-size: 1.25rem;
    }
    .login-campo input {
        font-size: 1rem;
        padding: 0.9rem 1rem;
    }
    .login-boton {
        font-size: 1.1rem;
        padding: 1rem;
    }
}