/* =====================================================
   PYPATH — RESPONSIVE STYLES
   Desktop >1200px | Tablet 768-1200px | Mobile <768px
===================================================== */

/* ── Tablet (hide right TOC, sidebar becomes overlay-ready) ── */
@media (max-width: 1200px) {
  .layout {
    grid-template-columns: 260px 1fr;
  }

  .toc-sidebar {
    display: none;
  }

  .main-content {
    grid-column: 2;
    padding: 1.75rem 2rem;
  }
}

/* ── Intermediate breakpoint ── */
@media (max-width: 960px) {
  .main-content {
    padding: 1.5rem;
  }

  .hero h1 { font-size: 2rem; }
  .modules-grid { grid-template-columns: repeat(auto-fill, minmax(240px, 1fr)); }
  .features-grid { grid-template-columns: repeat(auto-fill, minmax(200px, 1fr)); }
}

/* ── Mobile (<768px) ── */
@media (max-width: 768px) {
  .layout {
    grid-template-columns: 1fr;
  }

  /* Navbar */
  .hamburger { display: flex; }
  .navbar-center { flex: 1; }
  .progress-text { display: none; }

  /* Sidebar: hidden by default, slides in */
  .sidebar {
    transform: translateX(-100%);
    transition: transform var(--transition-med);
    z-index: 200;
    width: min(280px, 85vw);
    box-shadow: var(--shadow-lg);
  }
  .sidebar.open {
    transform: translateX(0);
  }
  .sidebar-close { display: block; }

  /* Main content full width */
  .main-content {
    grid-column: 1;
    padding: 1rem;
    min-width: 0;
  }

  /* Hero */
  .hero { padding: 2rem 0.5rem 3rem; }
  .hero-logo { font-size: 3.5rem; }
  .hero h1 { font-size: 1.75rem; }
  .hero-tagline { font-size: 1rem; }
  .hero-cta-row { flex-direction: column; align-items: center; }

  /* Home stats */
  .home-stats { gap: 1.5rem; }
  .stat-number { font-size: 1.5rem; }

  /* Modules grid */
  .modules-grid { grid-template-columns: 1fr; }

  /* Lesson nav */
  .lesson-nav { flex-direction: column; align-items: stretch; gap: 0.75rem; }
  .btn-nav { justify-content: center; }

  /* Scroll top button */
  .scroll-top { bottom: 1rem; right: 1rem; }

  /* Lesson heading */
  .lesson-header h1 { font-size: 1.6rem; }
  h2 { font-size: 1.3rem; }

  /* Search dropdown */
  .search-dropdown { max-height: 280px; }

  /* Breadcrumb */
  .breadcrumb { display: none; }

  /* Features */
  .features-grid { grid-template-columns: 1fr 1fr; }
  .feature-card:hover { transform: none; }

  /* Footer */
  .footer-links { gap: 1rem; }
}

/* ── Small mobile (<480px) ── */
@media (max-width: 480px) {
  .navbar { padding: 0 0.75rem; gap: 0.5rem; }
  .brand-name { display: none; }
  .main-content { padding: 0.75rem; }
  .features-grid { grid-template-columns: 1fr; }
  pre[class*="language-"] { font-size: 0.78rem !important; padding: 1rem !important; }
  .code-block-header { padding: 0.4rem 0.75rem; }
  h1 { font-size: 1.5rem; }
  .hero h1 { font-size: 1.5rem; }
  .lesson-meta { flex-direction: column; align-items: flex-start; gap: 0.5rem; }
}

/* ── Large desktop ── */
@media (min-width: 1600px) {
  .main-content { padding: 2.5rem 4rem; }
  .modules-grid { grid-template-columns: repeat(4, 1fr); }
}

/* ── Touch devices: disable hover transitions ── */
@media (hover: none) {
  .module-card:hover { transform: none; }
  .btn-primary:hover { transform: none; }
  .btn-nav:hover { transform: none; }
  .colab-btn:hover { transform: none; }
}

/* ── High contrast mode ── */
@media (forced-colors: active) {
  .code-block { border: 1px solid ButtonText; }
  .btn-primary { border: 2px solid ButtonText; }
}