/* =====================================================
   RADIO FM - Botón Regreso (Volver a Inicio)
   Estilos simples y responsivos para login y registro
   ===================================================== */

/* === BOTÓN REGRESO === */
.login-header-bar {
    background: var(--bg-card);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-color);
    padding: 1rem;
    position: sticky;
    top: 0;
    z-index: 100;
}

.btn-back {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.6rem 1.2rem;
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    color: var(--bg-dark);
    text-decoration: none;
    border-radius: var(--radius-md);
    font-weight: 600;
    font-size: 0.95rem;
    transition: all var(--transition-fast);
    cursor: pointer;
    border: none;
    box-shadow: var(--glow-primary);
}

.btn-back:hover {
    transform: translateY(-2px);
    box-shadow: 0 0 30px rgba(0, 240, 255, 0.8);
}

.btn-back:active {
    transform: translateY(0);
}

/* === RESPONSIVE === */
@media (max-width: 767px) {
    .login-header-bar {
        padding: 0.75rem;
    }
    
    .btn-back {
        font-size: 0.9rem;
        padding: 0.5rem 1rem;
    }
}

@media (max-width: 479px) {
    .login-header-bar {
        padding: 0.5rem;
    }
    
    .btn-back {
        font-size: 0.85rem;
        padding: 0.45rem 0.9rem;
    }
}