/* =========================================================
   Pantallas de autenticación
   Compartido por: login, cambio de contraseña y confirmación.
   Antes vivía duplicado en tres bloques <style> con las clases
   .login-box / .change-box / .done-box; ahora todas usan .auth-box.
   ========================================================= */
.auth-main {
    min-height: calc(100vh - 56px); /* 56px ≈ altura de la navbar */
    display: flex;
    justify-content: center;
    align-items: center;
    background: linear-gradient(135deg, var(--g600), var(--g400));
    padding-top: 0;
}

.auth-box {
    background: white;
    padding: 2rem;
    border-radius: 12px;
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.2);
    width: 100%;
    max-width: 420px;
    text-align: center;
}

.auth-box h2 {
    margin-bottom: 1.5rem;
    color: var(--g600);
}

.auth-box .btn-success {
    background-color: var(--g600);
    border-color: var(--g600);
}

.auth-box .btn-success:hover {
    background-color: var(--g800);
    border-color: var(--g800);
}