/* =========================================================
   PORTFÓLIO — responsive.css
   Breakpoints: 1024px (tablet), 768px (mobile grande), 480px (mobile)
   ========================================================= */

/* ---------- Tablet: 1024px ---------- */
@media (max-width: 1024px) {
  .skills-grid { grid-template-columns: repeat(2, 1fr); }
  .projects-grid { grid-template-columns: repeat(2, 1fr); }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }

  .hero__inner { gap: var(--space-lg); }
  .contact__grid { grid-template-columns: 1fr; }
}

/* ---------- Mobile grande: 768px ---------- */
@media (max-width: 768px) {
  :root { --space-2xl: 4rem; --space-xl: 2.5rem; }

  .nav {
    position: fixed;
    top: var(--header-h);
    left: 0; right: 0;
    background: var(--color-bg);
    border-bottom: 1px solid var(--color-border);
    max-height: 0;
    overflow: hidden;
    transition: max-height var(--transition-base);
  }
  .nav.is-open { max-height: 400px; }
  .nav__list {
    flex-direction: column;
    gap: 0;
    padding: 0.5rem 1.5rem 1.5rem;
  }
  .nav__list li { border-bottom: 1px solid var(--color-border); }
  .nav__list li:last-child { border-bottom: none; }
  .nav__link { display: block; padding-block: 0.9rem; }
  .nav__link::after { display: none; }

  .nav-toggle { display: flex; }
  .nav-toggle[aria-expanded="true"] span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
  .nav-toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
  .nav-toggle[aria-expanded="true"] span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

  .hero__inner {
    grid-template-columns: 1fr;
    text-align: left;
  }
  .hero__visual { order: -1; max-width: 420px; }
  .hero { min-height: auto; padding-block: calc(var(--header-h) + 2.5rem) 3rem; }

  .about__grid { grid-template-columns: 1fr; }
  .skills-grid { grid-template-columns: repeat(2, 1fr); }
  .projects-grid { grid-template-columns: 1fr; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }

  .back-to-top { right: 1.25rem; bottom: 1.25rem; width: 42px; height: 42px; }
}

/* ---------- Mobile: 480px ---------- */
@media (max-width: 480px) {
  .container { padding-inline: 1.15rem; }

  .skills-grid { grid-template-columns: 1fr 1fr; gap: 0.85rem; }
  .stats-grid { grid-template-columns: 1fr 1fr; gap: 0.85rem; }

  .hero__actions { flex-direction: column; align-items: stretch; }
  .hero__actions .btn { width: 100%; }

  .code-window { transform: none; }
  .code-window__body { font-size: 0.78rem; padding: 1.1rem; }

  .section-title { font-size: 1.6rem; }
}