/* ═══════════════════════════════════════════════════════
   RESPONSIVE — Learn Django
   Shared media queries for tablet, mobile, and small phone
   ═══════════════════════════════════════════════════════ */

/* ── Tablet (≤1024px) ── */
@media (max-width: 1024px) {
  header {
    padding: 1.25rem 1.5rem;
    gap: 1rem;
  }
  nav button {
    font-size: 0.65rem;
    padding: 0.35rem 0.6rem;
  }
  .layout {
    grid-template-columns: 220px 1fr;
  }
  aside {
    padding: 1.5rem 1rem;
  }
  main {
    padding: 2rem;
  }
  h1 {
    font-size: 2.2rem;
  }
  .crud-table {
    font-size: 0.7rem;
  }
  .crud-table th,
  .crud-table td {
    padding: 0.5rem 0.6rem;
  }
}

/* ── Mobile / small tablet (≤768px) ── */
@media (max-width: 768px) {
  .menu-toggle {
    display: flex;
  }
  .header-tag {
    display: none;
  }
  header {
    padding: 1rem 1.25rem;
    gap: 0.75rem;
  }
  nav {
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
    gap: 0.15rem;
    flex-shrink: 1;
    min-width: 0;
  }
  nav::-webkit-scrollbar { display: none; }
  nav button {
    font-size: 0.62rem;
    padding: 0.3rem 0.55rem;
    white-space: nowrap;
    flex-shrink: 0;
  }

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

  aside {
    position: fixed;
    top: 0;
    left: 0;
    width: 280px;
    height: 100vh;
    background: var(--bg);
    z-index: 50;
    transform: translateX(-100%);
    transition: transform 0.3s ease;
    border-right: 1px solid var(--border);
    padding: 5rem 1.5rem 2rem;
  }
  aside.open {
    transform: translateX(0);
  }

  main {
    padding: 2rem 1.25rem;
    max-width: 100%;
  }
  h1 {
    font-size: 1.8rem;
  }
  h2 {
    font-size: 1.3rem;
    margin: 2rem 0 0.75rem;
  }
  .lead {
    font-size: 0.9rem;
  }

  /* Make tables horizontally scrollable */
  .crud-table {
    display: block;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
  }
  .matrix {
    display: block;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
  }

  /* Flow diagram wraps */
  .flow {
    flex-wrap: wrap;
    gap: 0.5rem;
  }
  .flow-arrow {
    display: none;
  }
  .flow-arrow-col {
    display: none;
  }
  .flow-step {
    flex: 1 1 auto;
    min-width: 90px;
  }

  /* Card grids single column */
  .cbv-grid,
  .rbac-grid,
  .threat-grid {
    grid-template-columns: 1fr;
  }

  /* Instructors stack vertically */
  .instructors {
    flex-direction: column;
    align-items: center;
  }
  .instructor {
    max-width: 100%;
    width: 100%;
  }

  pre {
    padding: 1rem;
    font-size: 0.7rem;
  }
}

/* ── Small phone (≤480px) ── */
@media (max-width: 480px) {
  header {
    padding: 0.75rem 1rem;
    gap: 0.5rem;
  }
  .logo {
    font-size: 0.95rem;
  }
  nav button {
    font-size: 0.58rem;
    padding: 0.25rem 0.45rem;
  }

  main {
    padding: 1.5rem 1rem;
  }
  h1 {
    font-size: 1.5rem;
  }
  h2 {
    font-size: 1.15rem;
  }
  p, .callout, .quiz-text {
    font-size: 0.75rem;
  }
  .lead {
    font-size: 0.82rem;
  }

  .code-block {
    border-radius: 6px;
  }
  pre {
    padding: 0.75rem;
    font-size: 0.65rem;
    line-height: 1.6;
  }
  .code-header {
    padding: 0.4rem 0.75rem;
  }
  .code-filename {
    font-size: 0.6rem;
  }

  .callout {
    padding: 0.75rem 1rem;
  }

  .quiz-opt {
    font-size: 0.68rem;
    padding: 0.4rem 0.7rem;
  }

  .step {
    gap: 0.75rem;
  }
  .step-num {
    width: 24px;
    height: 24px;
    font-size: 0.6rem;
  }

  .compare-toggle {
    flex-wrap: wrap;
  }

  .ep-row {
    flex-wrap: wrap;
    gap: 0.4rem;
  }

  /* Instructors — tighten padding */
  .instructors {
    margin-top: 2rem;
  }
  .instructor {
    padding: 1.5rem 1rem;
  }
  .instructor-photo {
    width: 80px;
    height: 80px;
  }
  .instructors-heading {
    font-size: 1.3rem;
  }
}