/* Desktop refinement shared by every full-page surface. */
@media (min-width: 901px) {
  :root {
    --desktop-content-width: 1240px;
    --desktop-section-gap: 28px;
    --desktop-radius: 14px;
  }

  html {
    scroll-behavior: smooth;
  }

  body:not(.auth-page-body) .main-content {
    width: min(100%, calc(var(--desktop-content-width) + 2 * var(--bbs-content-gutter)));
    margin-inline: auto;
    box-sizing: border-box;
  }

  body:not(.auth-page-body) .main-content::before {
    max-width: var(--desktop-content-width);
    margin-inline: auto;
  }

  /* Cover the whole header, including the gutters outside its title surface. */
  body:not(.auth-page-body) > .mobile-header-backdrop {
    display: block;
    position: fixed;
    z-index: 109;
    inset: 0 0 auto var(--bbs-shell-width);
    height: 92px;
    background: var(--ui-page);
    pointer-events: none;
  }

  body:not(.auth-page-body) .main-content > :where(section, article, header) {
    animation: none;
  }

  body:not(.auth-page-body)
    :where(
      .settings-profile,
      .settings-card,
      .workbench-card,
      .workbench-economy-section,
      .discussion-board-about,
      .discussion-compose,
      .discussion-detail,
      .discussion-stats-sidebar,
      .discussion-post-card,
      .aichat-dialogs,
      .aichat-main,
      .aichat-auth-required,
      .economy-auth-required,
      .economy-heat-panel,
      .shop-item-card,
      .inventory-item-row,
      .home-dashboard-panel,
      .public-profile-stat,
      .admin-user-row,
      .system-settings-menu,
      .system-settings-form,
      .course-hero,
      .course-overview,
      .course-toolbar,
      .course-card,
      .knowledge-sidebar,
      .knowledge-content,
      .knowledge-section,
      .knowledge-rag-thread
    ) {
    box-shadow: none !important;
  }

  body:not(.auth-page-body)
    :where(
      .settings-card,
      .workbench-card,
      .discussion-post-card,
      .inventory-item-row,
      .admin-user-row,
      .course-card,
      .shop-item-card
    ) {
    border-radius: 10px !important;
  }

  body:not(.auth-page-body)
    :where(a, button, input, textarea, select, summary):not(:where(.bbs-action)) {
    transition:
      color 180ms ease,
      background-color 180ms ease,
      border-color 180ms ease,
      box-shadow 180ms ease,
      transform 180ms ease,
      opacity 180ms ease;
  }

  body:not(.auth-page-body) .topbar .nav-link:hover {
    transform: translateX(2px);
  }

  body:not(.auth-page-body) .main-content :where(h1, h2, h3) {
    letter-spacing: -0.025em;
    text-wrap: balance;
  }

  body:not(.auth-page-body) .main-content :where(p, li, dd) {
    text-wrap: pretty;
  }

  body:not(.auth-page-body)
    .main-content
    :where(.home-dashboard, .settings-shell, .discussion-shell, .aichat-shell, .workbench-shell) {
    width: min(100%, var(--desktop-content-width));
    margin-inline: auto;
  }

  /* Settings follows the same profile-first hierarchy as mobile. */
  body.personal-settings-page .settings-shell {
    display: grid !important;
    grid-template-columns: minmax(260px, 0.72fr) minmax(540px, 1.65fr) !important;
    gap: 38px !important;
    align-items: start !important;
  }

  body.personal-settings-page .settings-header {
    display: none !important;
  }

  body.personal-settings-page .personal-overview {
    display: block;
    position: sticky;
    top: 116px;
    padding: 8px 4px 24px;
  }

  body.personal-settings-page .personal-identity {
    display: flex;
    align-items: center;
    gap: 20px;
  }

  body.personal-settings-page .personal-avatar {
    display: block !important;
    width: 86px !important;
    height: 86px !important;
    flex: 0 0 86px;
  }

  body.personal-settings-page .personal-avatar img {
    width: 100%;
    height: 100%;
    border-radius: 50%;
    object-fit: cover;
  }

  body.personal-settings-page .personal-identity h2 {
    margin: 0 0 9px;
    font-size: clamp(1.45rem, 2vw, 1.9rem);
  }

  body.personal-settings-page .personal-profile-link {
    color: var(--ui-muted);
    font-size: var(--type-ui-small-size);
    text-decoration: none;
  }

  body.personal-settings-page .personal-bio {
    max-width: 34ch;
    margin: 24px 0;
    color: var(--ui-muted);
    line-height: 1.75;
    white-space: pre-wrap;
  }

  body.personal-settings-page .personal-balances {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 14px;
    padding-block: 18px;
    border-block: 1px solid var(--ui-line);
  }

  body.personal-settings-page .personal-balances span {
    display: grid;
    gap: 5px;
    color: var(--ui-muted);
    font-size: var(--type-meta-size);
  }

  body.personal-settings-page .personal-balances strong {
    color: var(--ui-text);
    font-size: var(--type-section-title-size);
    font-variant-numeric: tabular-nums;
  }

  body.personal-settings-page .personal-balances button {
    grid-column: 1 / -1;
    justify-self: start;
    padding: 9px 15px;
    border: 1px solid var(--ui-accent);
    border-radius: 9px;
    background: transparent;
    color: var(--ui-accent);
    font: inherit;
    cursor: pointer;
  }

  body.personal-settings-page .settings-profile {
    display: grid !important;
    gap: 0 !important;
    padding: 0 clamp(20px, 2vw, 28px) !important;
    box-sizing: border-box;
    border: 0 !important;
    border-radius: 0 !important;
    background: transparent !important;
  }

  body.personal-settings-page .settings-form,
  body.personal-settings-page .course-token-settings {
    padding: 28px 0 !important;
    border: 0 !important;
    border-bottom: 1px solid var(--ui-line) !important;
    border-radius: 0 !important;
    background: transparent !important;
    box-shadow: none !important;
  }

  body.personal-settings-page .settings-account-actions {
    grid-column: 2;
    margin: 0 !important;
    padding: 22px clamp(20px, 2vw, 28px) !important;
    box-sizing: border-box;
    border-top: 1px solid var(--ui-line);
  }

  /* Workbench keeps information dense while dropping nested card chrome. */
  body.personal-workbench-page .workbench-shell {
    gap: var(--desktop-section-gap) !important;
  }

  body.personal-workbench-page .workbench-hero {
    padding: 4px 0 24px !important;
    border: 0 !important;
    border-bottom: 1px solid var(--ui-line) !important;
    border-radius: 0 !important;
    background: transparent !important;
    box-shadow: none !important;
  }

  body.personal-workbench-page .workbench-dashboard-card,
  body.personal-workbench-page .workbench-economy-section,
  body.personal-workbench-page .workbench-quick-section {
    border-color: var(--ui-line) !important;
    background: var(--ui-surface) !important;
    box-shadow: none !important;
  }

  body.personal-workbench-page .workbench-card:hover,
  body:not(.auth-page-body) :where(.discussion-post-card, .course-card, .shop-item-card):hover {
    border-color: var(--ui-line-strong) !important;
    transform: translateY(-2px);
  }

  /* Discussion and Max use line-based separation instead of card stacks. */
  body.discussion-page .main-content,
  body.discussion-page .main-content > .settings-shell,
  body.discussion-page .main-content .discussion-shell {
    width: 100% !important;
    max-width: none !important;
    margin-inline: 0 !important;
  }

  body.discussion-page .main-content::before {
    max-width: none;
    margin-inline: 0;
  }

  /* A translated entrance animation also moves the sticky navigation beneath it. */
  body.discussion-page .main-content > .settings-shell {
    animation: none !important;
  }

  body.discussion-page .discussion-layout,
  body.discussion-page .discussion-layout:not(.is-detail-view) {
    grid-template-columns: minmax(0, 1fr) !important;
    grid-template-areas:
      'stats'
      'feed';
  }

  body.discussion-page .discussion-page-heading {
    padding-bottom: 26px;
    border-bottom: 1px solid var(--ui-line);
  }

  body.discussion-page
    .main-content
    .discussion-layout:not(.is-detail-view)
    .discussion-stats-sidebar {
    position: sticky;
    top: 92px;
    z-index: 100;
    isolation: isolate;
    overflow: visible;
    display: block;
    width: 100%;
    padding: 0 !important;
    border: 0 !important;
    border-radius: 0 !important;
    background: var(--ui-page) !important;
    box-shadow: none !important;
  }

  /* The board row masks scrolling avatars and previews in the side gutters too. */
  body.discussion-page .discussion-layout:not(.is-detail-view) .discussion-stats-sidebar::before {
    content: '';
    position: absolute;
    z-index: -1;
    inset: 0 calc(-1 * var(--bbs-content-gutter));
    background: var(--ui-page);
    pointer-events: none;
  }

  body.discussion-page .discussion-stats-sidebar .discussion-stats-section {
    padding: 0;
    border: 0;
  }

  body.discussion-page .discussion-stats-sidebar h2 {
    position: absolute;
    width: 1px;
    height: 1px;
    margin: -1px;
    padding: 0;
    overflow: hidden;
    clip-path: inset(50%);
    white-space: nowrap;
  }

  body.discussion-page .main-content .discussion-board-list {
    gap: 20px !important;
  }

  body.discussion-page .main-content .discussion-board-chip {
    width: auto !important;
    min-width: auto !important;
    min-height: 44px;
    padding: 8px 2px !important;
    border: 0 !important;
    border-bottom: 2px solid transparent !important;
    border-radius: 0 !important;
    background: transparent !important;
    box-shadow: none !important;
  }

  body.discussion-page .main-content .discussion-board-chip:hover,
  body.discussion-page .main-content .discussion-board-chip.is-active {
    border-bottom-color: var(--discussion-accent-strong) !important;
    background: transparent !important;
  }

  body.discussion-page .main-content .discussion-board-about {
    margin-bottom: 18px;
    padding: 18px 0 !important;
    border: 0 !important;
    border-bottom: 1px solid var(--discussion-line) !important;
    border-radius: 0 !important;
    background: transparent !important;
    box-shadow: none !important;
  }

  body.discussion-page .discussion-feed-toolbar-actions #discussion-deleted-filter {
    display: inline-flex;
    grid-template-columns: none;
    align-items: center;
    gap: 7px;
    min-width: max-content;
    white-space: nowrap;
  }

  body.discussion-page .discussion-feed-toolbar-actions #discussion-deleted-filter.hidden {
    display: none !important;
  }

  body.discussion-page .discussion-post-card {
    border-inline: 0 !important;
    border-top: 0 !important;
    border-radius: 0 !important;
    background: transparent !important;
  }

  body.aichat-page .aichat-main,
  body.aichat-page .aichat-dialogs {
    border-radius: var(--desktop-radius) !important;
    box-shadow: none !important;
  }

  body.home-page .home-dashboard-panel,
  body.home-page .home-action-card {
    box-shadow: none !important;
  }

  body.home-page .home-action-card:hover {
    transform: translateY(-3px);
  }
}

@media (prefers-reduced-motion: reduce) {
  body:not(.auth-page-body) .main-content > :where(section, article, header) {
    animation: none !important;
  }
}