/* =========================================================
   Responsive — intentional layouts per breakpoint
   1440+ wide · 1200 laptop · 1024 tablet-landscape · 768 tablet · <768 phone
   ========================================================= */

/* Wide screens: give the feed room to breathe */
@media (min-width: 1600px) {
  :root { --panel-width: 340px; }
}

/* Laptop: collapse the right panel slightly */
@media (max-width: 1279px) {
  :root { --panel-width: 300px; }
  .layout.feed-layout { gap: var(--space-8); }
  .page { padding-left: var(--space-6); padding-right: var(--space-6); }
}

/* Below 1200px: mini rail by default, the full guide opens as an overlay drawer */
@media (max-width: 1199px) {
  .app, .guide-mini .app { grid-template-columns: var(--rail-width) minmax(0, 1fr); }
  .tb-start { width: auto; }
  .app-sidebar { padding: var(--space-1); }
  .app-sidebar .nav-label, .app-sidebar .nav-sep, .app-sidebar .sidebar-foot, .app-sidebar .nav-list:not(:first-child) { display: none; }
  .app-sidebar .nav-list .rail-only { display: block; }
  .app-sidebar .nav-item { flex-direction: column; justify-content: center; gap: 6px; height: 74px; padding: 14px 0 12px; font-size: 10px; }
  .app-sidebar .nav-item .nav-text { flex: 0; max-width: 100%; text-align: center; }
  .app-sidebar .nav-item[aria-current="page"] { background: none; }

  .guide-open .app-sidebar {
    position: fixed; top: 0; left: 0; bottom: 0; height: 100vh; width: var(--sidebar-width); z-index: var(--z-drawer);
    padding: 0 var(--space-3) var(--space-4); box-shadow: var(--shadow-lg); animation: guide-in 220ms var(--ease-out) both;
  }
  .guide-open .guide-head { display: flex; align-items: center; gap: var(--space-2); height: var(--topbar-height); padding: 0 var(--space-1); margin-bottom: var(--space-2); }
  .guide-open .guide-head .icon-btn { color: var(--color-text); border-radius: 50%; }
  .guide-open .app-sidebar .nav-label, .guide-open .app-sidebar .sidebar-foot, .guide-open .app-sidebar .nav-list:not(:first-child) { display: block; }
  .guide-open .app-sidebar .nav-label { display: flex; }
  .guide-open .app-sidebar .nav-sep { display: block; }
  .guide-open .app-sidebar .nav-list .rail-only { display: none; }
  .guide-open .app-sidebar .nav-item { flex-direction: row; justify-content: flex-start; gap: 22px; height: 40px; padding: 0 12px; font-size: var(--text-sm); }
  .guide-open .app-sidebar .nav-item .nav-text { flex: 1; text-align: left; }
  .guide-open .app-sidebar .nav-item[aria-current="page"] { background: var(--color-surface-hover); }
  .guide-open .guide-backdrop { display: block; position: fixed; inset: 0; z-index: calc(var(--z-drawer) - 1); background: var(--color-overlay); animation: fade-in 200ms both; }

  .admin-shell { grid-template-columns: 1fr; }
  .admin-nav { position: static; display: flex; overflow-x: auto; scrollbar-width: none; }
  .admin-nav a { white-space: nowrap; }
}
@keyframes guide-in { from { transform: translateX(-100%); } to { transform: none; } }

/* Tablet: contextual panel stacks; feed stays the hero */
@media (max-width: 1023px) {
  .layout, .layout.feed-layout { grid-template-columns: minmax(0, 1fr); }
  .layout.feed-layout { max-width: var(--feed-max); margin: 0 auto; }
  .sidebar { position: static; }
  /* Home: the context panel collapses into a quick-action chip row */
  .feed-layout > .sidebar { display: none; }
  .quick-row { display: flex; }
  .hero { grid-template-columns: 1fr; gap: var(--space-10); padding-top: var(--space-8); }
  .float-card.one { left: 12px; } .float-card.two { right: 12px; }
  .feature-band { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .auth-shell { grid-template-columns: 1fr; }
  .auth-art { display: none; }
  .mosaic { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .recipe-facts { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

/* Phone: compact header + thumb-friendly bottom navigation */
@media (max-width: 767px) {
  :root { --topbar-height: 56px; }
  body { font-size: var(--text-base); }
  .app, .guide-mini .app { display: block; }
  .app-sidebar { display: none; }
  .guide-open .app-sidebar { display: flex; }
  .topbar { padding: 0 var(--space-2); gap: var(--space-1); }
  .tb-start { gap: 2px; }
  .topbar .brand { font-size: 1.1rem; }
  .topbar .global-search { display: none; }
  .topbar .mobile-only { display: inline-grid; }
  .topbar .desktop-only { display: none; }
  .page { padding: var(--space-4) var(--space-4) calc(var(--bottom-nav-height) + var(--space-10) + env(safe-area-inset-bottom)); }
  .page.public { padding-bottom: var(--space-10); }
  .site-footer { display: none; }

  .bottom-nav {
    position: fixed; left: 0; right: 0; bottom: 0; z-index: var(--z-nav);
    display: grid; grid-template-columns: repeat(5, 1fr); align-items: center;
    height: calc(var(--bottom-nav-height) + env(safe-area-inset-bottom)); padding: 0 6px env(safe-area-inset-bottom);
    background: var(--color-surface-glass); -webkit-backdrop-filter: saturate(160%) blur(16px); backdrop-filter: saturate(160%) blur(16px);
    border-top: 1px solid var(--color-border);
  }
  .bottom-nav a { position: relative; display: grid; justify-items: center; gap: 3px; padding: 8px 0; color: var(--color-text-subtle); font-size: 10.5px; font-weight: 600; -webkit-tap-highlight-color: transparent; }
  .bottom-nav a .icon { transition: transform var(--transition-normal) var(--ease-spring); }
  .bottom-nav a:active .icon { transform: scale(.86); }
  .bottom-nav a[aria-current="page"] { color: var(--color-text); }
  .bottom-nav a[aria-current="page"] .icon { color: var(--color-primary); }
  .bottom-nav a[aria-current="page"]::before { content: ''; position: absolute; top: 0; width: 20px; height: 2px; border-radius: 0 0 2px 2px; background: var(--color-primary); }
  .bottom-nav .create .create-btn { width: 48px; height: 40px; border-radius: 14px; display: grid; place-items: center; background: var(--color-text); color: var(--color-background); box-shadow: var(--shadow-md); }
  .bottom-nav .create { color: var(--color-text); }

  .toast-region { left: 16px; right: 16px; width: auto; align-items: stretch; bottom: calc(var(--bottom-nav-height) + 12px + env(safe-area-inset-bottom)); }

  /* Modals become bottom sheets */
  .modal { place-items: end stretch; padding: 0; }
  .modal-box { max-width: none !important; max-height: 90vh; border-radius: var(--border-radius-xl) var(--border-radius-xl) 0 0; padding: var(--space-6) var(--space-5) calc(var(--space-6) + env(safe-area-inset-bottom)); transform: translateY(40px); filter: none; }
  .modal-box::before { content: ''; position: absolute; top: 8px; left: 50%; width: 36px; height: 4px; margin-left: -18px; border-radius: 2px; background: var(--color-border-strong); }
  .modal.is-closing .modal-box { transform: translateY(40px); }
  .modal.variant-drawer { place-items: end stretch; }
  .modal.variant-drawer .modal-box { height: 86vh; border-radius: var(--border-radius-xl) var(--border-radius-xl) 0 0; border-width: 1px 0 0; transform: translateY(40px); padding: 0; }
  .modal.variant-drawer.is-closing .modal-box { transform: translateY(40px); }
  .modal-actions { flex-direction: column-reverse; }
  .modal-actions .btn { width: 100%; height: 46px; }

  h1 { font-size: 1.75rem; }
  .page-head { margin-bottom: var(--space-5); align-items: flex-start; }
  .card { padding: var(--space-4); border-radius: var(--border-radius-md); }
  .card.flush, .post-card { padding: 0; }
  .grid-3, .grid-4 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .grid-2.collapse { grid-template-columns: 1fr; }
  .feature-band { grid-template-columns: 1fr; }
  .post-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: var(--space-2); }
  .card-grid, .for-you { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: var(--space-3); }
  .recipe-card .rc-body { padding: 12px; }
  .recipe-card h3 { font-size: 1rem; }
  .recipe-card .recipe-meta { gap: 4px 10px; }

  /* Feed cards go edge-to-edge for immersion */
  .feed { gap: var(--space-3); margin: 0 calc(-1 * var(--space-4)); }
  .feed .post-card { border-radius: 0; border-left: 0; border-right: 0; }
  .post-content { padding: 12px 16px 2px; }
  .post-title { font-size: 1.2rem; }
  .post-actions .act { padding: 0 10px; }

  .discover-hero { padding: var(--space-8) var(--space-5); margin: 0 0 var(--space-6); border-radius: var(--border-radius-lg); }
  .h-scroll { grid-auto-columns: 74%; }
  .mosaic { grid-template-columns: repeat(2, minmax(0, 1fr)); grid-auto-rows: 150px; }
  .cuisine-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .creator-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: var(--space-3); }
  .section-title { margin-top: var(--space-8); }

  .profile-cover { height: 140px; }
  .profile-info { padding: 0 var(--space-4) var(--space-5); margin-top: -44px; gap: var(--space-4); }
  .profile-info .grow { padding-top: 0; min-width: 0; flex-basis: 100%; }
  .avatar.lg { width: 96px; height: 96px; }
  .profile-actions { width: 100%; }
  .profile-actions .btn { flex: 1; }
  .stats > div { flex: 1; min-width: 0; padding: 10px; text-align: center; }

  .recipe-facts > div { padding: 12px; }
  .steps li { padding-left: 46px; font-size: var(--text-base); }
  .steps li::before { font-size: 1.3rem; }
  .steps li::after { left: 12px; }
  .nutri { grid-template-columns: repeat(2, 1fr); }
  .sticky-actions { bottom: calc(var(--bottom-nav-height) + 10px + env(safe-area-inset-bottom)); }

  .ai-hero { padding: var(--space-6) var(--space-5); border-radius: var(--border-radius-lg); }
  .ai-subnav { flex-wrap: nowrap; overflow-x: auto; margin-right: calc(-1 * var(--space-5)); padding-right: var(--space-5); scrollbar-width: none; }
  .ai-subnav a { flex-shrink: 0; }
  .chat { height: calc(100vh - var(--topbar-height) - var(--bottom-nav-height) - 210px); min-height: 380px; }
  .chat-log { padding: var(--space-4); }
  .msg { max-width: 88%; }

  .hero { padding: var(--space-6) 0 var(--space-10); }
  .hero h1 { font-size: 2.6rem; }
  .float-card { display: none; }
  .cta-band { padding: var(--space-10) var(--space-5); }
  .auth-shell { border: 0; box-shadow: none; background: transparent; min-height: 0; }
  .auth-panel { padding: var(--space-6) 0; }
  .public-header { padding: 0 var(--space-4); height: 60px; }
  .public-header .actions .btn.ghost { display: none; }

  .tabs { gap: var(--space-5); margin-left: calc(-1 * var(--space-4)); margin-right: calc(-1 * var(--space-4)); padding: 0 var(--space-4); }
  .share-grid { grid-template-columns: repeat(4, minmax(0, 1fr)); }
  .table-wrap { margin: 0 calc(-1 * var(--space-4)); padding: 0 var(--space-4); }
}

/* Small phones (320–374) */
@media (max-width: 374px) {
  .page { padding-left: var(--space-3); padding-right: var(--space-3); }
  .feed { margin: 0 calc(-1 * var(--space-3)); }
  .grid-3, .grid-4, .card-grid, .for-you, .creator-grid { grid-template-columns: 1fr; }
  .post-actions .act { padding: 0 8px; gap: 5px; }
  .hero h1 { font-size: 2.2rem; }
  .btn.lg { padding: 0 18px; }
  .stats { gap: 6px; }
  .stats > div { padding: 8px 4px; }
  .bottom-nav a { font-size: 10px; }
}

/* Touch devices: no hover-only affordances */
@media (hover: none) {
  .carousel-btn { display: none; }
  .comment-tools { opacity: 1; }
  .grid-stats { opacity: 1; transform: none; }
}

/* Print: recipes should print cleanly */
@media print {
  .app-sidebar, .topbar, .bottom-nav, .sidebar, .post-actions, .sticky-actions, .site-footer, #comments, .toast-region { display: none !important; }
  .app { display: block; }
  body { background: #fff; }
}