html {
  font-size: 14px;
}

@media (min-width: 768px) {
  html {
    font-size: 16px;
  }
}

.btn:focus, .btn:active:focus, .btn-link.nav-link:focus, .form-control:focus, .form-check-input:focus {
  box-shadow: 0 0 0 0.1rem white, 0 0 0 0.25rem #258cfb;
}

html {
  position: relative;
  min-height: 100%;
}

body {
  margin-bottom: 60px;
}

/* 1. Difuminado de fondo premium (Efecto Glassmorphism) */
#ModalLoading.modal {
    backdrop-filter: blur(6px);
    -webkit-backdrop-filter: blur(6px);
    background-color: rgba(15, 23, 42, 0.4); /* Un tono oscuro traslúcido sofisticado */
    transition: all 0.3s ease-in-out;
}

/* Container interno flotante */
.backend-loader-container {
    background: rgba(255, 255, 255, 0.85);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.4);
    border-radius: 1.25rem; /* Bordes muy curvos estilo iOS/SaaS moderno */
    box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
}

/* 2. Spinner de anillo infinito con gradiente */
.modern-spinner {
    width: 56px;
    height: 56px;
    margin: 0 auto;
    border: 4px solid rgba(13, 110, 253, 0.15); /* Color base tenue (Bootstrap Primary) */
    border-radius: 50%;
    border-top-color: #0d6efd; /* Color de acción brillante */
    animation: smooth-spin 0.85s cubic-bezier(0.4, 0, 0.2, 1) infinite;
}

/* 3. Estilos de Texto */
.loader-title {
    color: #1e293b; /* Gris oscuro corporativo, evita el negro puro */
    font-size: 1.1rem;
    font-weight: 600;
    letter-spacing: -0.025em;
}

.loader-subtitle {
    color: #64748b; /* Texto secundario suave */
    font-size: 0.85rem;
    margin-bottom: 0;
    margin-top: 4px;
}

/* 4. Animación de puntos suspensivos (...) vivos */
.animated-dots::after {
    content: '.';
    animation: dots 1.5s steps(5, end) infinite;
}

/* KINETIC ANIMATIONS */
@keyframes smooth-spin {
    from {
        transform: rotate(0deg);
    }

    to {
        transform: rotate(360deg);
    }
}

@keyframes dots {
    0%, 20% {
        content: '.';
    }

    40% {
        content: '..';
    }

    60% {
        content: '...';
    }

    80%, 100% {
        content: '';
    }
}