/* ==========================================================================
   Responsive — Animations, Breakpoints, Syntax Highlighting
   ========================================================================== */

/* --- Animations --- */
.fade-in {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

/* --- Tablet (768px) --- */
@media (max-width: 768px) {
  .nav-toggle {
    display: block;
  }

  .nav-menu {
    position: fixed;
    top: 0;
    right: -100%;
    width: 280px;
    height: 100vh;
    background: var(--bg-secondary);
    flex-direction: column;
    align-items: flex-start;
    padding: 5rem 2rem 2rem;
    gap: 1.5rem;
    transition: right var(--transition);
    border-left: 1px solid var(--border);
  }

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

  .nav-links {
    flex-direction: column;
    gap: 0.25rem;
    width: 100%;
  }

  .nav-links a {
    display: block;
    padding: 0.75rem;
    font-size: 1rem;
  }

  .lang-switcher {
    border-left: none;
    border-top: 1px solid var(--border);
    padding-left: 0;
    padding-top: 1rem;
  }

  .hero {
    padding: 5rem 0 3rem;
  }

  .hero-portrait img {
    width: 210px;
    height: 210px;
  }

  .hero-name {
    font-size: 2.5rem;
  }

  .hero-tagline {
    font-size: 0.85rem;
  }

  h1 {
    font-size: 1.75rem;
  }

  .blog-post-header h1 {
    font-size: 1.75rem;
  }

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

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

/* --- Mobile (480px) --- */
@media (max-width: 480px) {
  :root {
    --site-padding: 1rem;
  }

  .hero {
    padding: 4rem 0 2.5rem;
  }

  .hero-portrait img {
    width: 180px;
    height: 180px;
  }

  .hero-name {
    font-size: 2rem;
  }

  .hero-intro {
    font-size: 1rem;
  }

  .article-card {
    padding: 1.25rem;
  }

  .blog-post-meta {
    flex-wrap: wrap;
  }

  .about-facts {
    grid-template-columns: 1fr;
  }
}

/* --- Syntax Highlighting (Chroma — Dracula-inspired) --- */
.highlight pre {
  background: var(--bg-code);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 1.25rem;
  overflow-x: auto;
}