/* ==========================================================================
   BANCA VIRTUAL BICICLETAS - RESPONSIVE & MOBILE DESIGN
   ========================================================================== */

/* --- 1. PANTALLAS GRANDES Y LAPTOPS (<= 1199px) --- */
@media (max-width: 1199px) {
  .hero-title {
    font-size: var(--font-size-3xl);
  }

  .grid-hero {
    grid-template-columns: 1fr 1fr;
    gap: var(--space-8);
  }

  .footer-top {
    grid-template-columns: 1.2fr repeat(3, 1fr);
    gap: var(--space-8);
  }
}

/* --- 2. TABLETS EN ORIENTACIÓN HORIZONTAL / PANTALLAS MEDIANAS (<= 991px) --- */
@media (max-width: 991px) {
  :root {
    --container-padding: 1.25rem;
  }

  .grid-hero {
    grid-template-columns: 1fr;
    gap: var(--space-12);
  }

  .hero-description {
    max-width: 100%;
  }

  .grid-4 {
    grid-template-columns: repeat(2, 1fr);
  }

  .grid-3 {
    grid-template-columns: repeat(2, 1fr);
  }

  .calculator-container {
    grid-template-columns: 1fr;
  }

  .calc-results-pane {
    border-left: none;
    border-top: 1px solid var(--color-border-gold);
  }

  .simit-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .simit-steps-flow {
    grid-template-columns: repeat(2, 1fr);
  }

  .team-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .service-detailed-card,
  .service-detailed-card.reverse {
    grid-template-columns: 1fr;
    gap: var(--space-6);
  }

  .service-detailed-card.reverse .service-info-col {
    order: 1;
  }

  .service-detailed-card.reverse .service-visual-col {
    order: 2;
  }

  .contact-layout-grid {
    grid-template-columns: 1fr;
    gap: var(--space-8);
  }

  .footer-top {
    grid-template-columns: 1fr 1fr;
    gap: var(--space-10);
  }

  .footer-brand {
    grid-column: span 2;
  }

  /* Menú Móvil / Offcanvas Navigation */
  .mobile-toggle {
    display: flex;
  }

  .main-nav {
    position: fixed;
    top: 0;
    right: -100%;
    width: 320px;
    max-width: 85vw;
    height: 100vh;
    background-color: var(--color-primary-dark);
    color: var(--color-text-inverse);
    flex-direction: column;
    align-items: flex-start;
    padding: var(--space-12) var(--space-8);
    gap: var(--space-8);
    z-index: var(--z-modal);
    box-shadow: -8px 0 24px rgba(0, 0, 0, 0.4);
    transition: right var(--transition-smooth);
    overflow-y: auto;
  }

  .main-nav.is-open {
    right: 0;
  }

  .nav-list {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--space-5);
    width: 100%;
  }

  .nav-link {
    font-size: var(--font-size-md);
    color: var(--color-text-inverse-muted);
    display: block;
    width: 100%;
    padding: var(--space-2) 0;
  }

  .nav-link.active,
  .nav-link:hover {
    color: var(--color-gold);
  }

  .header-actions {
    display: none;
  }

  .main-nav .nav-mobile-cta {
    display: block;
    width: 100%;
    margin-top: var(--space-4);
  }

  /* Overlay de Fondo */
  .nav-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(10, 30, 20, 0.65);
    backdrop-filter: blur(4px);
    z-index: calc(var(--z-modal) - 1);
    opacity: 0;
    visibility: hidden;
    transition: opacity var(--transition-base), visibility var(--transition-base);
  }

  .nav-overlay.is-open {
    opacity: 1;
    visibility: visible;
  }

  .nav-close-btn {
    position: absolute;
    top: 1.5rem;
    right: 1.5rem;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-gold);
    border-radius: var(--radius-sm);
  }
}

/* --- 3. SMARTPHONES Y TABLETS VERTICALES (<= 767px) --- */
@media (max-width: 767px) {
  .section {
    padding-top: var(--space-12);
    padding-bottom: var(--space-12);
  }

  .section-title {
    font-size: var(--font-size-2xl);
  }

  .hero-title {
    font-size: 2.15rem;
  }

  .hero-metrics {
    grid-template-columns: 1fr;
    gap: var(--space-4);
  }

  .grid-2,
  .grid-3,
  .grid-4 {
    grid-template-columns: 1fr;
  }

  .simit-grid {
    grid-template-columns: 1fr;
  }

  .simit-steps-flow {
    grid-template-columns: 1fr;
  }

  .values-grid {
    grid-template-columns: 1fr;
  }

  .team-grid {
    grid-template-columns: 1fr;
  }

  .form-row-2 {
    grid-template-columns: 1fr;
  }

  .term-selector-group {
    grid-template-columns: repeat(2, 1fr);
  }

  .footer-top {
    grid-template-columns: 1fr;
    gap: var(--space-8);
  }

  .footer-brand {
    grid-column: span 1;
  }

  .footer-bottom {
    flex-direction: column;
    gap: var(--space-4);
    text-align: center;
  }

  .footer-security-badges {
    flex-wrap: wrap;
    justify-content: center;
  }

  .btn-block-mobile {
    width: 100%;
  }
}

/* --- 4. SMARTPHONES PEQUEÑOS (<= 480px) --- */
@media (max-width: 480px) {
  .hero-title {
    font-size: 1.85rem;
  }

  .calc-inputs-pane,
  .calc-results-pane,
  .simit-section-wrapper {
    padding: var(--space-6);
  }

  .card {
    padding: var(--space-6);
  }

  .hero-cta-group {
    flex-direction: column;
    width: 100%;
  }

  .hero-cta-group .btn {
    width: 100%;
  }
}