/* Responsive breakpoints:
 * Desktop  (1280px+): full sidebar, all columns visible
 * Tablet   (768-1279px): icon-only sidebar (52px), view tabs overflow
 * Phone    (375-767px): sidebar hidden, bottom navigation, simplified columns
 */

/* ── Tablet ────────────────────────────────────────────────────────────── */
@media (max-width: 1279px) and (min-width: 768px) {
  .sidebar {
    width: var(--sidebar-collapsed-width);
  }

  .sidebar-logo, .sidebar-workspace-name, .sidebar-section,
  .sidebar-item span, .sidebar-footer .avatar-info {
    display: none;
  }

  .sidebar-item {
    padding: 8px;
    justify-content: center;
  }

  .sidebar-item .space-dot { width: 12px; height: 12px; }

  .sidebar-footer {
    justify-content: center;
    padding: 8px;
  }

  .view-tabs { display: none; }
  .view-tabs-overflow { display: flex !important; }

  .list-header-row,
  .task-row {
    grid-template-columns: 24px 110px 1fr 90px;
  }

  /* Hide due date and priority columns on tablet */
  .col-due, .col-priority { display: none; }
}

/* ── Phone ─────────────────────────────────────────────────────────────── */
@media (max-width: 767px) {
  .sidebar { display: none; }

  .main-content { padding-bottom: 56px; }

  /* Bottom navigation bar */
  .bottom-nav {
    display: flex !important;
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    height: 56px;
    background: var(--surface-1);
    border-top: 1px solid var(--border);
    z-index: 50;
    align-items: center;
    justify-content: space-around;
    padding: 0 4px;
  }

  .bottom-nav-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 2px;
    padding: 6px 12px;
    border-radius: 6px;
    color: var(--text-muted);
    font-size: 10px;
    cursor: pointer;
    min-width: 44px;
    min-height: 44px;
    justify-content: center;
    text-decoration: none;
  }

  .bottom-nav-item.active { color: var(--accent); }

  .task-panel { width: 100%; }

  /* Column headers are redundant on phone once .col-status/.col-due/.col-priority below are
     hidden — the only label left would be "Task name", and status is already conveyed by the
     group header (Open/In Progress/...) above each cluster of rows. Drop the whole row rather
     than let it re-wrap around a near-empty grid. */
  .list-header-row { display: none; }

  .task-row {
    grid-template-columns: 24px 1fr 32px;
  }

  /* Redundant with the group header (status), or low-priority for a glance list on a phone
     (due date, priority) — still reachable by tapping into the task detail panel. Scoped to the
     fixed-column view only — .task-row/.list-header-row set grid-template-columns via this
     stylesheet, so removing a grid ITEM here is safe: the rule above already accounts for the
     resulting track count. Do NOT extend this display:none to .tlv-row/.tlv-header-row (below):
     those set grid-template-columns INLINE per row, so display:none-ing one grid item without
     also removing its track from that inline template just shifts every later column left by
     one slot into the wrong-sized track — see the --tlv-status-w handling below instead. */
  .list-header-row .col-status, .task-row .col-status,
  .col-due, .col-priority { display: none; }

  /* ListPage's List View (dynamic per-List columns — see TaskListView.razor/NestedTaskRow.razor)
     sets grid-template-columns INLINE per row, so none of the display:none tricks above apply to
     it — every fix for it is a var() override on the custom properties that template is built
     from (below). Originally every dynamic column was a literal 110px, which on a 375-414px phone
     made the fixed tracks alone exceed the viewport; because .task-name has overflow:hidden, its
     grid-item auto-minimum collapses to 0 rather than its content size, so the name column
     silently shrank to ~0px while the neighboring cell (e.g. the priority dot) still occupied its
     full 110px track — visually and hit-test-wise landing ON TOP of the invisible task name.
     Confirmed via document.elementFromPoint at the task-name's own center: resolved to the
     priority-dot's wrapper div, so a real tap there mis-hit every time, not just a Playwright
     artifact. Hiding the dynamic columns outright (like .col-due/.col-priority above) isn't an
     option: ColumnDragReorderTests deliberately drags .tlv-col-header cells at the phone viewport
     and documents that "the live-reorder half of this feature works on phone fine". Fixed instead
     by giving the name track a real minimum (minmax(var(--tlv-name-w,100px),1fr), which also keeps
     the header grid and each row grid in step) and narrowing the other tracks below so they fit.
     overflow-x stays as a safety net for a List configured with many columns, where the row
     legitimately can't fit and horizontal scroll beats compressing columns into an overlap. */
  #task-list { overflow-x: auto; }

  /* Status is redundant here too (see .list-header-row/.task-row above — same reasoning, the
     group header already conveys it), but .tlv-row/.tlv-header-row can't just display:none the
     cell (that would shift every later column into the wrong track, see above). Instead
     TaskListView.razor's GridTemplateColumns emits the status track as var(--tlv-status-w,110px)
     specifically so it can be collapsed here: zeroing the custom property shrinks that one track
     to 0 and hands the freed space to the task-name track, while every other track keeps its
     position. overflow:hidden switches the cell's automatic minimum size from its content's
     max-content width down to 0 (same trick .task-name already relies on above) so the 0px track
     actually collapses instead of being forced back open by the status badge's intrinsic size. */
  .tlv-row, .tlv-header-row {
    --tlv-status-w: 0px;

    /* 110px per dynamic column is mostly empty width on a phone — a priority dot is 8px, an
       avatar 22px, a "MMM d" due date ~38px — while the task name (the one column you actually
       read on a phone) sat pinned at its 100px minimum and the row still overflowed a 390px
       viewport by ~200px. Sizing each column to what it renders frees ~180px, all of which goes
       to the name's 1fr track, and the default 3-column list then fits with no horizontal scroll.
       Headers/values wider than these tracks are clipped to them (app.css), not spilled over. */
    --tlv-col-icon-w: 30px;    /* priority dot */
    --tlv-col-avatar-w: 48px;  /* assignee avatar stack */
    --tlv-col-date-w: 58px;    /* due/start/created/updated — "MMM d" */
    --tlv-col-w: 64px;         /* everything else: counts, estimates, custom fields */

    /* Trailing "+ Add column" track: header-only, so it's dead width in every data row. Keep it
       just wide enough for that button (11px text + 10px side padding) rather than 90px. */
    --tlv-add-w: 52px;
  }
  .tlv-row .col-status, .tlv-header-row .col-status { overflow: hidden; min-width: 0; }

  /* Desktop drag-resize only — phone tracks are already clamped via the --tlv-* vars above. */
  .tlv-col-resize { display: none !important; }

  .topbar { padding: 0 52px 0 52px; }
  .topbar .breadcrumb { font-size: 11px; }

  .view-tabs { display: none; }
  /* Hide secondary toolbar buttons on mobile — keep only the primary "New Task" button */
  .topbar-actions .btn-ghost { display: none; }
  /* Icon-only New Task button on mobile */
  .new-task-label { display: none; }

  .kanban-column { width: 85vw; }
  .board-content { padding: 8px; }
}

/* Hidden by default — shown only at specific breakpoints */
.bottom-nav { display: none; }
.view-tabs-overflow { display: none; }
.panel-mobile-back { display: none; }

/* ── Mobile hamburger (hidden on desktop) ───────────────────────────────── */
.mobile-nav-toggle { display: none; }

/* ── 3-pane shell mobile layout ─────────────────────────────────────────── */
@media (max-width: 767px) {
  /* Top search bar collides with the hamburger on narrow screens; full search is still reachable from the nav. */
  .topsearch { display: none; }

  /* The workspace switcher lives ONLY in the top bar (it was moved out of the submenu drawer), so
     it must stay visible on mobile — otherwise there's no way to change companies on a phone.
     Pad the bar left to clear the fixed hamburger, and drop the secondary quick-action icons
     (all reachable from the profile menu / bottom nav) so the switcher + avatar fit.
     Selector must be `.tshell .tshell-topbar` (not bare `.tshell-topbar`) to match app.css's
     `.tshell .tshell-topbar { padding: 0 16px }` specificity — otherwise that non-media-query
     rule always wins regardless of load order and this padding-left never applies. */
  .tshell .tshell-topbar { padding-left: 54px; }
  .tshell-toolbar-icons { display: none; }

  /* Hamburger button */
  .mobile-nav-toggle {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 5px;
    position: fixed;
    top: 8px;
    left: 10px;
    z-index: 600;
    width: 36px;
    height: 36px;
    background: var(--surface-1, #fff);
    border: 1px solid var(--border, #e2e8f0);
    border-radius: 8px;
    padding: 0;
    cursor: pointer;
    box-shadow: 0 1px 4px rgba(0,0,0,0.12);
  }
  .mobile-nav-toggle span {
    display: block;
    height: 2px;
    width: 18px;
    background: var(--text-primary, #1e293b);
    border-radius: 2px;
    transition: transform .2s, opacity .2s;
  }

  /* Rail + submenu: off-screen by default, slide in when nav-open. padding-top clears the fixed
     hamburger's footprint (top:8px, 36px tall, z-index:600 — above the rail's z-index:510): without
     it the rail's first item lands directly under the toggle button and is unclickable (the toggle
     wins the stacking order and intercepts the click). */
  .rail {
    position: fixed;
    top: 0; left: 0; bottom: 0;
    padding-top: 56px;
    transform: translateX(-100%);
    transition: transform .25s ease;
    z-index: 510;
  }
  .submenu {
    position: fixed;
    top: 0; bottom: 0;
    left: 0;
    transform: translateX(calc(-100% - var(--rail-width, 54px)));
    transition: transform .25s ease;
    z-index: 509;
  }
  .tshell.nav-open .rail {
    transform: translateX(0);
  }
  .tshell.nav-open .submenu {
    transform: translateX(var(--rail-width, 54px));
  }

  /* Backdrop behind the nav drawer */
  .mobile-nav-backdrop {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.45);
    z-index: 508;
  }

  /* Desktop << / >> are irrelevant on phone — hamburger owns open/close. Also force the
     submenu back to full width even if the user collapsed it on desktop (localStorage),
     otherwise the slide-in drawer would open empty. */
  .rail-expand-btn,
  .rail-expand-divider,
  .sidebar-toggle-btn { display: none !important; }
  .submenu.submenu-collapsed {
    width: var(--submenu-width);
    border-right: 1px solid var(--sidebar-border, #e2e8f0);
  }

  /* Main content takes full width since nav is overlaid */
  .tmain { width: 100%; }

  /* Task detail panel: full-screen on mobile (rail+submenu are off-screen) */
  .task-panel-overlay { left: 0; }
  /* Show the in-panel back button on mobile */
  .panel-mobile-back { display: flex !important; }

  /* Props bar: single column on mobile so label + value don't overflow narrow screens */
  .task-props-bar { grid-template-columns: 1fr !important; }
  .task-props-bar .prop-row:nth-child(3n),
  .task-props-bar .prop-row:nth-child(2n) { border-right: none; }
}