/* ChatGPT-style collapsed sidebar control: show the brand mark at rest and
   reveal the menu icon on hover or keyboard focus. */
.workspace-logo-toggle { position: relative; }
.workspace-logo-toggle .workspace-logo-menu-icon { display: none; }

@media (min-width: 901px) {
  .sidebar-collapsed .workspace-logo-toggle { color: #dce6f2; }

  .sidebar-collapsed .workspace-logo-toggle .workspace-logo,
  .sidebar-collapsed .workspace-logo-toggle .workspace-logo-menu-icon {
    transition: opacity 130ms ease, transform 130ms ease;
  }

  .sidebar-collapsed .workspace-logo-toggle .workspace-logo-menu-icon {
    position: absolute;
    inset: 50% auto auto 50%;
    display: block;
    width: 21px;
    height: 21px;
    opacity: 0;
    transform: translate(-50%, -50%) scale(.88);
  }

  .sidebar-collapsed .workspace-logo-toggle:hover .workspace-logo,
  .sidebar-collapsed .workspace-logo-toggle:focus-visible .workspace-logo,
  .sidebar-collapsed .workspace-logo-toggle.is-logo-hovered .workspace-logo {
    opacity: 0;
    transform: scale(.88);
  }

  .sidebar-collapsed .workspace-logo-toggle:hover .workspace-logo-menu-icon,
  .sidebar-collapsed .workspace-logo-toggle:focus-visible .workspace-logo-menu-icon,
  .sidebar-collapsed .workspace-logo-toggle.is-logo-hovered .workspace-logo-menu-icon {
    opacity: 1;
    transform: translate(-50%, -50%) scale(1);
  }
}

/* Mobile workspace shell: retain the desktop-style left navigation without a
   full-width menu block above the board. */
@media (max-width: 900px) {
  :root { --sidebar-width: 58px; }

  body { overflow-x: hidden; }

  .workspace-main {
    width: calc(100% - var(--sidebar-width));
    margin-left: var(--sidebar-width);
  }

  .workspace-sidebar {
    position: fixed;
    inset: 0 auto 0 0;
    z-index: 120;
    width: var(--sidebar-width);
    height: 100dvh;
    padding: 10px 8px;
    overflow: hidden;
    border-right: 1px solid #263b50;
    transition: width 180ms ease, box-shadow 180ms ease;
  }

  .workspace-sidebar.mobile-expanded {
    width: min(230px, calc(100vw - 24px));
    box-shadow: 16px 0 40px rgba(7, 20, 34, .28);
  }

  .workspace-brand {
    min-height: 44px;
    justify-content: center;
    gap: 9px;
    margin: 0 0 12px;
  }

  .workspace-logo-expanded,
  .workspace-brand-copy,
  .workspace-logo-toggle { display: none; }

  .workspace-tools-toggle {
    display: inline-grid;
    place-items: center;
    flex: 0 0 42px;
    width: 42px;
    height: 42px;
    min-height: 42px;
    margin: 0;
    padding: 0;
    border: 0;
    border-radius: 7px;
    background: transparent;
    color: #dce6f2;
  }

  .workspace-tools-toggle span { display: none; }

  .workspace-tools-toggle:hover,
  .workspace-tools-toggle[aria-expanded="true"] { background: #263c55; }

  .workspace-sidebar.mobile-expanded .workspace-brand { justify-content: flex-start; }

  .workspace-sidebar.mobile-expanded .workspace-logo-expanded {
    display: block;
    width: 26px;
    height: 37px;
  }

  .workspace-sidebar.mobile-expanded .workspace-brand-copy { display: block; }
  .workspace-sidebar.mobile-expanded .workspace-tools-toggle { margin-left: auto; }

  .sidebar-navigation {
    display: flex;
    flex: 1;
    min-height: 0;
    padding-top: 0;
    overflow-x: hidden;
    overflow-y: auto;
    scrollbar-width: none;
  }

  .sidebar-navigation::-webkit-scrollbar { display: none; }

  .sidebar-navigation > .sidebar-label,
  .sidebar-footer > .sidebar-label { display: none; }

  .workspace-nav {
    display: grid;
    gap: 3px;
    padding: 0;
    overflow: visible;
  }

  .workspace-nav .nav-item,
  .sidebar-file-actions .nav-item,
  .reset-action {
    position: relative;
    justify-content: center;
    flex: 0 0 auto;
    width: 42px;
    min-height: 42px;
    padding: 0;
    white-space: normal;
  }

  .workspace-nav .nav-item span:not(.reminder-badge),
  .sidebar-file-actions .nav-item span,
  .reset-action span { display: none; }

  #calendarBtn { flex-wrap: nowrap; }

  #calendarBtn .reminder-badge {
    position: absolute;
    top: 2px;
    right: 2px;
    min-width: 16px;
    height: 16px;
    padding: 0 4px;
    font-size: 10px;
    line-height: 16px;
  }

  .sidebar-footer {
    display: flex;
    flex-direction: column;
    align-items: stretch;
    flex-wrap: nowrap;
    gap: 3px;
    margin-top: auto;
    padding-top: 10px;
    border-top: 1px solid #2d3b50;
  }

  .sidebar-file-actions {
    display: flex;
    flex-direction: column;
    gap: 3px;
  }

  .local-save,
  .web-collab-panel { display: none; }

  .workspace-sidebar.mobile-expanded .sidebar-navigation > .sidebar-label,
  .workspace-sidebar.mobile-expanded .sidebar-footer > .sidebar-label { display: block; }

  .workspace-sidebar.mobile-expanded .workspace-nav .nav-item,
  .workspace-sidebar.mobile-expanded .sidebar-file-actions .nav-item,
  .workspace-sidebar.mobile-expanded .reset-action {
    justify-content: flex-start;
    width: 100%;
    padding: 8px 9px;
    white-space: normal;
  }

  .workspace-sidebar.mobile-expanded .workspace-nav .nav-item span:not(.reminder-badge),
  .workspace-sidebar.mobile-expanded .sidebar-file-actions .nav-item span,
  .workspace-sidebar.mobile-expanded .reset-action span { display: inline; }

  .workspace-sidebar.mobile-expanded .sidebar-file-actions { width: 100%; }

  .workspace-sidebar.mobile-expanded .local-save {
    display: flex;
    width: auto;
    margin: 12px 0 0;
  }

  .workspace-sidebar.mobile-expanded .local-save-label,
  .workspace-sidebar.mobile-expanded .local-save > .ui-icon { display: initial; }

  .workspace-sidebar.mobile-expanded .web-collab-panel { display: grid; }
  .workspace-sidebar.mobile-expanded .current-user-display { white-space: normal; }

  .topbar { padding: 18px 16px 15px; }
  .board-controls { padding-inline: 16px; }
  .board-region { padding-inline: 14px 10px; }
}

@media (max-width: 640px) {
  :root { --column-width: clamp(250px, calc(100vw - 86px), 340px); }

  .title-row {
    align-items: center;
    flex-wrap: nowrap;
    gap: 10px;
  }

  .project-title {
    min-width: 0;
    font-size: clamp(1.18rem, 6vw, 1.45rem);
  }

  #addCardBtn {
    min-width: 0;
    padding-inline: 10px;
  }

  .overview-row {
    justify-content: space-between;
    gap: 5px;
    overflow-x: auto;
  }

  .overview-metric { flex: 0 0 auto; }
  .board-controls { padding: 13px 12px 14px; }
  .board-region { padding: 14px 8px 22px 12px; }

  .primary-controls,
  .search-filter-actions { min-width: 0; }
}