/* A deliberate mobile layer for the shared shell, Community, and Media.
   Desktop layouts stay untouched; phones get larger targets, calmer rhythm,
   and a useful bottom navigation for the most important destinations. */

.mobile-bottom-nav {
  display: none;
}

@media (max-width: 840px) {
  :root {
    --header-height: 62px;
    --header-top: 9px;
    --header-space: 82px;
  }

  html {
    overflow-x: hidden;
    scroll-padding-top: 88px;
  }

  body {
    overflow-x: hidden;
    -webkit-tap-highlight-color: transparent;
  }

  body.community-page,
  body.media-page {
    padding-bottom: calc(82px + env(safe-area-inset-bottom));
  }

  [data-site-header]:not(:empty) {
    height: var(--header-space);
  }

  .site-header {
    height: var(--header-space);
    padding-top: var(--header-top);
  }

  .site-header .nav {
    width: calc(100% - 20px);
    height: var(--header-height);
    padding: 0 7px 0 9px;
    gap: 4px;
    border-radius: 21px;
  }

  .site-header .nav::before {
    border-radius: 21px;
    background: rgba(255, 255, 255, .9);
  }

  html[data-theme="dark"] .site-header .nav::before {
    background: rgba(12, 17, 27, .92);
  }

  .site-header .brand {
    min-width: 0;
    gap: 7px;
    padding: 2px 4px 2px 2px;
  }

  .site-header .brand img {
    width: 39px;
    height: 39px;
    border-radius: 12px;
  }

  .site-header .brand > span:last-child {
    display: block;
    max-width: 94px;
    overflow: hidden;
    color: var(--nav-heading);
    font-size: .82rem;
    letter-spacing: -.045em;
    text-overflow: ellipsis;
  }

  .nav-actions {
    gap: 4px;
  }

  .site-header .directory-menu-button,
  .site-header .menu-btn,
  .site-header .auth-nav .btn,
  .site-header .auth-nav :is(.auth-icon-btn, .auth-user-button) {
    width: 40px;
    min-width: 40px;
    height: 40px;
    padding: 0;
    border-radius: 14px;
  }

  .site-header .directory-menu-button {
    display: inline-flex;
  }

  .site-header .directory-menu-button > span,
  .site-header .directory-menu-button > .bx-chevron-down {
    display: none;
  }

  .site-header .menu-btn {
    display: inline-flex;
  }

  .site-header .auth-nav {
    gap: 4px;
  }

  .site-header .auth-nav > a[href="login.html"] {
    display: inline-flex;
    font-size: 0;
  }

  .site-header .auth-nav > a[href="login.html"] i {
    margin: 0;
    font-size: 1.08rem;
  }

  .site-header .auth-nav > a[href="register.html"],
  .site-header .auth-nav .auth-register-stack,
  .site-header .auth-nav .auth-utility-group .auth-utility-link:not(.notification-nav-link) {
    display: none;
  }

  .site-header .auth-nav .auth-utility-group {
    display: inline-flex;
    gap: 4px;
  }

  .site-header .auth-nav .auth-utility-group .notification-nav-link,
  .site-header .auth-nav .auth-user-button {
    display: inline-flex;
  }

  .site-header .auth-nav .auth-user-button {
    overflow: hidden;
  }

  .site-header .auth-nav .auth-user-button .auth-avatar {
    width: 30px;
    height: 30px;
  }

  .site-header .nav-links.open {
    top: calc(100% + 8px);
    left: 0;
    right: 0;
    max-height: calc(100dvh - 98px);
    overflow-y: auto;
    overscroll-behavior: contain;
    padding: 8px;
    border: 1px solid var(--nav-line);
    border-radius: 20px;
    background: var(--surface, #fff);
    box-shadow: var(--nav-shadow);
  }

  .site-header .nav-links.open a {
    min-height: 48px;
    padding: 12px 13px;
    border-radius: 13px;
  }

  .site-header .nav-links.open a i {
    width: 22px;
    text-align: center;
  }

  .site-header .nav-directory.open .nav-directory-menu {
    position: fixed;
    inset: calc(var(--header-top) + var(--header-height) + 8px) 10px auto;
    width: auto;
    max-height: calc(100dvh - var(--header-top) - var(--header-height) - 22px);
    overflow: auto;
    border-radius: 23px;
  }

  .static-site-header {
    width: calc(100% - 20px);
    height: var(--header-height);
    padding: 0 8px;
    border-radius: 21px;
  }

  .static-site-header .brand {
    min-width: 0;
  }

  .static-site-header .brand > span {
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
  }

  .static-nav-links {
    gap: 2px;
  }

  .static-nav-links a {
    padding: 8px;
  }

  body.community-page .container,
  body.media-page .container {
    width: min(calc(100% - 32px), var(--max));
    padding-inline: 0;
  }

  body.community-page .btn,
  body.media-page .btn {
    min-height: 46px;
    touch-action: manipulation;
  }

  body.community-page .btn.btn-sm,
  body.media-page .btn.btn-sm {
    min-height: 42px;
  }

  .community-page-hero,
  .media-reels-hero {
    padding: 36px 0 34px;
  }

  .community-page-hero-grid,
  .media-reels-hero-grid {
    grid-template-columns: 1fr;
    gap: 30px;
  }

  .community-page-hero h1,
  .media-reels-hero h1 {
    max-width: 680px;
    margin-top: 17px;
    font-size: clamp(3.1rem, 14vw, 5.1rem);
    line-height: .91;
  }

  .community-page-hero-copy > p,
  .media-reels-hero p {
    font-size: .96rem;
    line-height: 1.58;
  }

  .community-page .hero-actions,
  .media-page .hero-actions {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 8px;
    margin-top: 21px;
  }

  .community-page .hero-actions .btn,
  .media-page .hero-actions .btn {
    width: 100%;
    padding-inline: 10px;
    font-size: .78rem;
  }

  .community-page-proof {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 10px;
    margin-top: 20px;
    font-size: .7rem;
  }

  .community-page-proof span:last-child {
    grid-column: 1 / -1;
  }

  .community-orbit-card {
    width: 100%;
    min-height: 350px;
    padding: 19px;
    border-radius: 25px;
  }

  .community-orbit {
    height: 218px;
    margin-top: 8px;
  }

  .community-orbit::before {
    inset: 18px 16%;
  }

  .community-orbit::after {
    inset: 35px 24%;
  }

  .community-orbit-node {
    gap: 4px;
    padding: 7px;
    font-size: .63rem;
  }

  .community-orbit-node i {
    width: 31px;
    height: 31px;
    font-size: .95rem;
  }

  .community-orbit-caption {
    max-width: 240px;
    gap: 3px;
    font-size: .74rem;
  }

  .community-quick-links,
  .community-page-section,
  .media-library-section,
  .media-reels-section {
    padding: 51px 0;
  }

  .community-section-heading,
  .community-results-head,
  .media-section-heading,
  .media-library-toolbar,
  .media-reels-heading {
    align-items: stretch;
    flex-direction: column;
    gap: 14px;
  }

  .community-section-heading,
  .media-section-heading {
    margin-bottom: 18px;
  }

  .community-section-heading h2,
  .media-section-heading h2 {
    font-size: clamp(1.9rem, 8vw, 2.7rem);
  }

  .community-section-heading p,
  .media-section-heading p {
    font-size: .88rem;
    line-height: 1.5;
  }

  .community-section-heading > .btn,
  .media-section-heading > .btn,
  .media-reels-controls {
    width: 100%;
  }

  .community-tool-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 9px;
  }

  .community-tool-card {
    grid-template-columns: auto minmax(0, 1fr);
    gap: 10px;
    min-height: 112px;
    padding: 13px;
    border-radius: 16px;
  }

  .community-tool-card > span {
    width: 36px;
    height: 36px;
    border-radius: 11px;
    font-size: 1.08rem;
  }

  .community-tool-card strong {
    font-size: .78rem;
  }

  .community-tool-card small {
    font-size: .66rem;
  }

  .community-tool-card > i {
    display: none;
  }

  .community-stat-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 8px;
    margin-bottom: 12px;
  }

  .community-stat-grid > div {
    min-height: 78px;
    padding: 12px;
    border-radius: 14px;
  }

  .community-stat-grid strong {
    font-size: 1.42rem;
  }

  .community-stat-grid span {
    font-size: .64rem;
  }

  .community-search-panel,
  .community-discovery-toolbar {
    gap: 8px;
    padding: 10px;
    border-radius: 16px;
  }

  .community-search-main,
  .community-discovery-toolbar label {
    min-height: 48px;
    padding-inline: 11px;
  }

  .community-search-main kbd {
    display: none;
  }

  .community-filter-row {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 8px;
  }

  .community-filter-row select,
  .community-discovery-toolbar select {
    min-height: 46px;
    padding-inline: 10px;
    font-size: .72rem;
  }

  .community-filter-row .btn,
  .community-discovery-toolbar .btn {
    width: 100%;
  }

  .community-results-head {
    margin: 21px 0 13px;
  }

  .community-results-head h3 {
    font-size: 1rem;
  }

  .community-results-head p,
  .privacy-explainer {
    font-size: .7rem;
  }

  .community-user-grid,
  .community-skill-grid,
  .community-group-grid {
    grid-template-columns: 1fr;
    gap: 10px;
  }

  .community-page .community-user-card,
  .community-page .real-skill-card,
  .community-page .community-group-card {
    border-radius: 16px;
  }

  .community-page .community-user-card {
    padding: 15px;
  }

  .community-page .community-user-card .community-card-actions,
  .community-page .community-group-card .community-group-actions {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 7px;
  }

  .community-page .community-user-card .community-card-actions .btn,
  .community-page .community-group-card .community-group-actions .btn {
    min-width: 0;
    width: 100%;
    padding-inline: 8px;
    font-size: .7rem;
  }

  .community-live-counts {
    gap: 6px;
  }

  .community-live-counts span,
  .community-result-pill {
    padding: 7px 9px;
    font-size: .64rem;
  }

  .community-discovery-toolbar {
    grid-template-columns: 1fr;
  }

  .community-discovery-toolbar .community-result-pill {
    justify-content: center;
  }

  .community-principles {
    padding: 51px 0 72px;
  }

  .community-principles-card {
    grid-template-columns: 1fr;
    gap: 23px;
    padding: 23px 18px;
    border-radius: 22px;
  }

  .community-principles-card h2 {
    font-size: clamp(1.9rem, 8vw, 2.7rem);
  }

  .community-principle-list {
    grid-template-columns: 1fr;
    gap: 8px;
  }

  .community-page .community-drawer {
    position: fixed;
    inset: auto 0 0;
    width: 100%;
    max-width: 520px;
    max-height: min(88dvh, 720px);
    margin: 0 auto;
    overflow-y: auto;
    border-radius: 25px 25px 0 0;
    padding-bottom: calc(22px + env(safe-area-inset-bottom));
  }

  .community-page .community-drawer-close {
    position: sticky;
    top: 0;
    z-index: 2;
    margin-left: auto;
  }

  .media-hero-stack {
    width: 100%;
    min-height: 286px;
  }

  .media-hero-card {
    width: min(86%, 300px);
    padding: 13px;
    border-radius: 17px;
  }

  .media-hero-card.card-one { left: 0; }
  .media-hero-card.card-two { right: 0; }
  .media-hero-card.card-three { left: 8%; }

  .media-hero-card small {
    font-size: .66rem;
  }

  .media-library-toolbar {
    gap: 10px;
  }

  .media-filter-tabs {
    width: 100%;
    overflow-x: auto;
    flex-wrap: nowrap;
    scrollbar-width: none;
    -webkit-overflow-scrolling: touch;
  }

  .media-filter-tabs::-webkit-scrollbar {
    display: none;
  }

  .media-filter-tabs button {
    min-height: 42px;
    padding-inline: 12px;
    white-space: nowrap;
  }

  .media-library-toolbar > .btn {
    width: 100%;
  }

  .media-library-layout,
  .media-reels-layout {
    grid-template-columns: 1fr;
    gap: 13px;
  }

  .media-gallery {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 9px;
  }

  .media-tile {
    border-radius: 14px;
  }

  .media-tile-meta {
    gap: 6px;
    padding: 10px;
  }

  .media-tile-meta > div {
    display: block;
  }

  .media-tile-meta strong,
  .media-tile-type {
    display: block;
  }

  .media-tile-type {
    margin-top: 3px;
  }

  .media-tile-caption {
    font-size: .66rem;
  }

  .media-upload-card {
    position: static;
    order: 2;
    padding: 15px;
    border-radius: 17px;
  }

  .media-file-drop {
    min-height: 132px;
    padding: 18px 10px;
  }

  .media-reels-section {
    padding-top: 47px;
  }

  .media-reels-controls {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 8px;
  }

  .media-reels-controls .btn {
    width: 100%;
  }

  .reels-scroller {
    width: 100%;
    height: min(76svh, 720px);
    min-height: 520px;
    border-radius: 21px;
    scroll-snap-type: y mandatory;
    touch-action: pan-y;
  }

  .reel-card {
    height: min(76svh, 720px);
    min-height: 520px;
    scroll-snap-align: start;
  }

  .reel-overlay {
    gap: 12px;
    padding: 18px 15px calc(18px + env(safe-area-inset-bottom));
  }

  .reel-copy {
    max-width: calc(100% - 56px);
  }

  .reel-copy h3 {
    margin-bottom: 6px;
    font-size: clamp(1.18rem, 5vw, 1.7rem);
  }

  .reel-copy p {
    font-size: .72rem;
    line-height: 1.4;
  }

  .reel-format-badge {
    margin-bottom: 8px;
    padding: 5px 8px;
    font-size: .58rem;
  }

  .reel-author {
    margin-bottom: 8px;
  }

  .reel-actions {
    gap: 9px;
  }

  .reel-actions button {
    width: 48px;
    height: 48px;
    font-size: 1.18rem;
  }

  .reels-side-note {
    position: static;
    grid-template-columns: auto 1fr;
    align-items: center;
    gap: 8px 11px;
    padding: 15px;
    border-radius: 17px;
  }

  .reels-side-note .reels-side-icon {
    grid-row: 1 / span 5;
  }

  .reels-side-note .eyebrow,
  .reels-side-note h3,
  .reels-side-note p,
  .reels-key-hint,
  .reels-side-note .btn {
    grid-column: 2;
  }

  .reels-side-note .btn {
    width: 100%;
    margin-top: 4px;
  }

  .reels-key-hint {
    display: none;
  }

  .mobile-bottom-nav {
    position: fixed;
    inset: auto 10px max(10px, env(safe-area-inset-bottom)) 10px;
    z-index: 1005;
    display: grid;
    grid-template-columns: repeat(5, minmax(0, 1fr));
    gap: 3px;
    min-height: 64px;
    padding: 6px;
    border: 1px solid rgba(218, 224, 235, .9);
    border-radius: 21px;
    background: rgba(255, 255, 255, .91);
    box-shadow: 0 16px 36px rgba(24, 34, 58, .17);
    -webkit-backdrop-filter: blur(19px) saturate(145%);
    backdrop-filter: blur(19px) saturate(145%);
  }

  html[data-theme="dark"] .mobile-bottom-nav {
    border-color: rgba(95, 108, 128, .42);
    background: rgba(12, 17, 27, .94);
  }

  .mobile-bottom-nav a {
    display: grid;
    min-width: 0;
    min-height: 50px;
    place-items: center;
    align-content: center;
    gap: 2px;
    border-radius: 15px;
    color: #728099;
    font-size: .58rem;
    font-weight: 800;
    line-height: 1;
    text-align: center;
    transition: background .18s ease, color .18s ease, transform .18s ease;
  }

  .mobile-bottom-nav a i {
    font-size: 1.12rem;
  }

  .mobile-bottom-nav a span {
    max-width: 100%;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
  }

  .mobile-bottom-nav a:hover,
  .mobile-bottom-nav a:focus-visible,
  .mobile-bottom-nav a[aria-current="page"] {
    background: rgba(92, 120, 204, .12);
    color: #536bc0;
  }

  .mobile-bottom-nav a[aria-current="page"] {
    transform: translateY(-1px);
  }

  html[data-theme="dark"] .mobile-bottom-nav a {
    color: #aab4c8;
  }

  html[data-theme="dark"] .mobile-bottom-nav a:hover,
  html[data-theme="dark"] .mobile-bottom-nav a:focus-visible,
  html[data-theme="dark"] .mobile-bottom-nav a[aria-current="page"] {
    background: rgba(184, 167, 232, .13);
    color: #c8bcff;
  }

  body.community-page .back-to-top,
  body.media-page .back-to-top {
    right: 14px;
    bottom: calc(88px + env(safe-area-inset-bottom));
  }

  body.community-page #chatLaunch,
  body.media-page #chatLaunch {
    right: 14px;
    bottom: calc(88px + env(safe-area-inset-bottom));
  }

  body.community-page .platform-toast,
  body.media-page .platform-toast {
    right: 14px;
    bottom: calc(86px + env(safe-area-inset-bottom));
    max-width: min(330px, calc(100vw - 28px));
  }

  body.community-page :is(button, a, input, select, textarea),
  body.media-page :is(button, a, input, select, textarea) {
    scroll-margin-top: 96px;
  }
}

@media (max-width: 520px) {
  .site-header .brand > span:last-child {
    max-width: 78px;
  }

  .community-tool-grid {
    grid-template-columns: 1fr;
  }

  .community-tool-card {
    min-height: 76px;
  }

  .community-tool-card > i {
    display: block;
  }

  .community-filter-row {
    grid-template-columns: 1fr;
  }

  .community-page .community-user-card .community-card-actions,
  .community-page .community-group-card .community-group-actions {
    grid-template-columns: 1fr;
  }

  .community-page .community-card-actions .btn,
  .community-page .community-group-actions .btn {
    min-height: 44px;
  }

  .media-reels-hero h1,
  .community-page-hero h1 {
    font-size: clamp(2.75rem, 15vw, 4.2rem);
  }

  .reels-scroller {
    height: min(74svh, 650px);
    min-height: 490px;
  }

  .reel-card {
    height: min(74svh, 650px);
    min-height: 490px;
  }
}

@media (max-width: 380px) {
  .site-header .brand > span:last-child {
    display: none;
  }

  .site-header .directory-menu-button {
    display: none;
  }

  .media-gallery {
    grid-template-columns: 1fr;
  }

  .community-page .hero-actions,
  .media-page .hero-actions {
    grid-template-columns: 1fr;
  }

  .mobile-bottom-nav {
    inset-inline: 6px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .mobile-bottom-nav a {
    transition: none;
  }
}

/* Keep the homepage header aligned with the shared shell after its
   page-specific styles load: brand/nav left, utilities/auth right. */
@media (min-width: 841px) {
  body.home-simple.home-reference-page .site-header .nav {
    display: flex;
    align-items: center;
  }

  body.home-simple.home-reference-page .site-header .brand {
    flex: 0 0 auto;
    min-width: max-content;
  }

  body.home-simple.home-reference-page .nav-links {
    flex: 0 0 auto !important;
    width: max-content !important;
    min-width: 0 !important;
    justify-content: flex-start !important;
    margin-left: clamp(12px, 2.8vw, 48px);
  }

  body.home-simple.home-reference-page .nav-actions {
    display: flex;
    align-items: center;
    flex: 0 0 auto;
    min-width: max-content;
    margin-left: auto !important;
  }
}

@media (max-width: 840px) {
  body.home-simple.home-reference-page .site-header .nav {
    display: flex;
    align-items: center;
    justify-content: space-between;
  }

  body.home-simple.home-reference-page .site-header .brand {
    flex: 0 1 auto;
    min-width: 0;
  }

  body.home-simple.home-reference-page .nav-actions {
    flex: 0 0 auto;
    margin-left: auto !important;
  }
}