/* ==========================================================================
   CSS RESPONSIVE - Manuel Zacarias
   Sistema de Breakpoints Líquidos
   Mobile Strict: 320px - 480px
   Tablets & Folds: 481px - 1024px
   Desktop Standard: 1025px - 1440px
   Ultra-Wide: 1441px+
   ========================================================================== */

/* Overlay when mobile menu is active */
.menu-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background-color: rgba(10, 15, 28, 0.6);
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
  z-index: 990;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--transition-normal);
}

.menu-overlay.active {
  opacity: 1;
  pointer-events: auto;
}

/* Ultra-Wide: 1441px+ */
@media (min-width: 1441px) {
  .container {
    padding-left: 2rem;
    padding-right: 2rem;
  }

  section {
    padding-top: 6rem;
    padding-bottom: 6rem;
  }

  .hero-description {
    max-width: 800px;
  }
}

/* Desktop Standard: 1025px - 1440px (default, no overrides needed) */

/* Tablets & Folds: 481px - 1024px */
@media (max-width: 1024px) {
  .footer-content {
    gap: 3rem;
  }

  .projects-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 1.25rem;
  }

  .project-card.featured {
    grid-column: span 2;
  }

  .project-card.full {
    grid-column: 1 / -1;
  }

  .flow-diagram {
    flex-wrap: wrap;
    justify-content: center;
  }

  .flow-arrow {
    min-width: 2rem;
  }
}

@media (max-width: 768px) {
  section {
    padding-top: 4rem;
    padding-bottom: 4rem;
  }

  /* Header mobile styling */
  .mobile-menu-btn {
    display: flex;
  }

  .nav-menu {
    position: fixed;
    top: 0;
    right: -300px;
    width: 280px;
    height: 100vh;
    background-color: var(--bg-secondary);
    border-left: 1px solid var(--card-border);
    z-index: 1000;
    flex-direction: column;
    padding: 2rem 1.5rem;
    transition: right var(--transition-normal) cubic-bezier(0.16, 1, 0.3, 1);
    box-shadow: -10px 0 30px rgba(0, 0, 0, 0.5);
    display: flex !important;
  }

  .nav-menu.active {
    right: 0;
  }

  .menu-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 3rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid var(--card-border);
  }

  .menu-header h3 {
    font-size: 1.25rem;
    font-weight: 700;
  }

  .menu-close-btn {
    font-size: 1.5rem;
    color: var(--text-secondary);
    cursor: pointer;
    min-height: 48px;
    min-width: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
  }

  .nav-menu ul {
    flex-direction: column;
    align-items: flex-start;
    gap: 1.5rem;
    width: 100%;
  }

  .nav-menu li {
    width: 100%;
  }

  .nav-menu a {
    font-size: 1.1rem;
    padding: 0.75rem 0;
    width: 100%;
    min-height: 48px;
    display: flex;
    align-items: center;
  }

  /* About mobile section */
  .about-content {
    grid-template-columns: 1fr;
    gap: 3rem;
  }

  .about-image {
    order: -1;
  }

  .about-image img {
    width: 200px;
    height: 200px;
  }

  .about-stats {
    gap: 1rem;
    margin-top: 2rem;
  }

  /* Projects grid responsive */
  .projects-grid {
    grid-template-columns: 1fr;
    gap: 1.5rem;
  }

  .project-card.featured,
  .project-card.full {
    grid-column: 1;
  }

  .project-tabs {
    gap: 0;
  }

  .tab-btn {
    font-size: 0.85rem;
    padding: 0.7rem 1rem;
    min-height: 48px;
  }

  /* Flow diagram stacks vertically on mobile */
  .flow-diagram {
    flex-direction: column;
    align-items: center;
    gap: 0.75rem;
    padding: 1.5rem;
  }

  .flow-arrow {
    transform: rotate(90deg);
    min-width: unset;
    min-height: 1.5rem;
    font-size: 1rem;
  }

  .flow-node {
    width: 100%;
    max-width: 220px;
  }

  /* Contact layout */
  .contact-content {
    grid-template-columns: 1fr;
    gap: 3.5rem;
  }

  .contact-form {
    padding: 1.75rem;
  }

  /* Footer responsive */
  .footer-content {
    grid-template-columns: 1fr;
    gap: 2.5rem;
    text-align: center;
  }

  .footer-info p {
    max-width: 100%;
  }

  .footer-social .social-links {
    justify-content: center;
  }

  .footer-bottom-left {
    justify-content: center;
    text-align: center;
  }

  /* Accessibility panel mobile */
  .accessibility-panel {
    width: 100%;
    max-width: 320px;
    right: 1rem;
  }

  .accessibility-button {
    width: 48px;
    height: 48px;
    font-size: 1.2rem;
  }
}

/* Mobile Strict: 320px - 480px */
@media (max-width: 480px) {
  .container {
    padding-left: 1rem;
    padding-right: 1rem;
  }

  section {
    padding-top: 3rem;
    padding-bottom: 3rem;
  }

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

  .hero-cta .button {
    width: 100%;
    min-height: 48px;
  }

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

  .about-stats {
    grid-template-columns: 1fr;
    gap: 1.5rem;
  }

  .stat {
    border-bottom: 1px solid var(--card-border);
    padding-bottom: 1rem;
  }

  .stat:last-child {
    border-bottom: none;
    padding-bottom: 0;
  }

  .projects-grid {
    gap: 1.25rem;
  }

  .project-content {
    padding: 1.25rem;
  }

  .project-content h3 {
    font-size: calc(var(--fs-h3) * 0.9);
  }

  .skills-grid {
    grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
    gap: 0.75rem;
  }

  .skill-item {
    padding: 0.75rem 1rem;
    min-height: 48px;
  }

  .skill-item i {
    font-size: 1.35rem;
  }

  .skill-item span {
    font-size: 0.85rem;
  }

  .contact-methods {
    gap: 1.25rem;
  }

  .toast-container {
    bottom: 1rem;
    right: 1rem;
    left: 1rem;
  }

  .toast {
    min-width: unset;
    max-width: unset;
    width: 100%;
  }

  .footer-content {
    gap: 2rem;
  }
}