/* ── rStack Shell Layout ── */

* { margin: 0; padding: 0; box-sizing: border-box; }

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  min-height: 100vh;
  background: var(--rs-bg-page);
  color: var(--rs-text-primary);
  padding-bottom: env(safe-area-inset-bottom);
}

/* ── PWA install / update banners ── */

.rspace-banner {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 10000; /* above header (9999) */
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  padding: 8px 16px;
  font-size: 0.8125rem;
  animation: rspace-banner-in 0.3s ease-out;
}
@keyframes rspace-banner-in {
  from { transform: translateY(-100%); }
  to { transform: translateY(0); }
}
.rspace-banner--install {
  background: linear-gradient(135deg, #14b8a6, #0ea5e9);
  color: #fff;
}
.rspace-banner--update {
  background: linear-gradient(135deg, #f59e0b, #ef4444);
  color: #fff;
}
.rspace-banner__text {
  flex: 1;
  text-align: center;
  font-weight: 500;
}
.rspace-banner__action {
  padding: 4px 14px;
  border-radius: 6px;
  border: 1px solid rgba(255,255,255,0.4);
  background: rgba(255,255,255,0.2);
  color: #fff;
  font-size: 0.8125rem;
  font-weight: 600;
  cursor: pointer;
  white-space: nowrap;
  transition: background 0.15s;
}
.rspace-banner__action:hover {
  background: rgba(255,255,255,0.35);
}
.rspace-banner__close {
  background: none;
  border: none;
  color: rgba(255,255,255,0.7);
  font-size: 1.25rem;
  cursor: pointer;
  padding: 0 4px;
  line-height: 1;
}
.rspace-banner__close:hover {
  color: #fff;
}
/* Push header + content down when a banner is visible.
   --rs-banner-h is measured at runtime (see the banner-offset script in
   server/shell.ts). These offsets used to hardcode 36px, but a banner whose
   text wraps is 45-91px depending on viewport, so the header was painted OVER
   the banner and #app was pushed past the bottom of the screen. */
body.rspace-banner-visible .rstack-header {
  top: var(--rs-banner-h, 36px);
}
body.rspace-banner-visible .rstack-tab-row {
  top: calc(var(--rs-banner-h, 36px) + 53px); /* banner + 56px header - 3px overlap */
}
body.rspace-banner-visible #app {
  padding-top: calc(var(--rs-banner-h, 36px) + 92px);
}
@media (max-width: 640px) {
  .rspace-banner {
    font-size: 0.75rem;
    gap: 8px;
    padding: 6px 12px;
  }
  /* On mobile, header is sticky not fixed, so no offsets needed —
     the banner sits in flow above the header */
  body.rspace-banner-visible .rstack-header { top: 0; }
  body.rspace-banner-visible .rstack-tab-row { top: 0; }
  body.rspace-banner-visible #app { padding-top: 0; }
  .rspace-banner { position: sticky; }
}

/* ── Header bar ── */

.rstack-header {
  position: fixed;
  top: 0; left: 0; right: 0;
  height: 56px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 max(16px, env(safe-area-inset-right)) 0 max(16px, env(safe-area-inset-left));
  padding-top: env(safe-area-inset-top);
  z-index: 9999;
  border-bottom: 1px solid var(--rs-glass-border);
  color: var(--rs-text-primary);
}
/* backdrop-filter on pseudo-element so the header doesn't create a
   containing block that traps position:fixed children (e.g. app-switcher sidebar) */
.rstack-header::before {
  content: '';
  position: absolute;
  inset: 0;
  z-index: -1;
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  background: var(--rs-glass-bg);
}

.rstack-header__left {
  display: flex;
  align-items: center;
  gap: 4px;
  position: relative;
  z-index: 2;
  /* Backstop. The switchers are display:contents hosts, so their inner
     .switcher divs are THIS element's flex items; each now carries min-width:0
     so they genuinely shrink and ellipsize. If a future child forgets that,
     clipping it is strictly better than the alternative, which is what shipped:
     the cluster laid out at its intrinsic width and painted over
     .rstack-header__right (four overlapping pairs at 320px). Both dropdowns are
     position:fixed and the header keeps its backdrop-filter on a pseudo-element
     precisely so it is not a containing block, so nothing here clips a menu. */
  min-width: 0;
  overflow: hidden;
}

.rstack-header__center {
  flex: 1;
  display: flex;
  justify-content: center;
  padding: 0 16px;
  min-width: 0;
  overflow: visible;
}

.rstack-header__right {
  display: flex;
  align-items: center;
  gap: 12px;
  position: relative;
  z-index: 2;
  /* Sign-in / identity is the one control a first-time visitor must be able to
     hit. It never yields width to the left cluster. */
  flex-shrink: 0;
}

/* ── Header overflow ("More") menu ──────────────────────────────────────────
   Above 640px the wrapper and its item list are `display: contents`: they have
   no box, so <rstack-comment-bell> and friends stay direct flex children of
   .rstack-header__right and the desktop header lays out exactly as it did
   before the menu existed. Below 640px the wrapper becomes a real box and the
   item list becomes a dropdown tray.

   Nothing is ever moved in the DOM. Relocating a custom element between
   parents disconnects it, which would restart the chat and notification polls
   and drop any open panel every time the viewport crossed the breakpoint. */
.rstack-header__overflow,
.rstack-header__overflow-items { display: contents; }
.rstack-header__overflow-btn { display: none; }

@media (max-width: 640px) {
  .rstack-header__overflow {
    display: flex;
    align-items: center;
    /* The tray anchors here. The header deliberately keeps backdrop-filter on
       ::before so it is not a containing block, and neither the header nor
       __right clips, so this box is the only positioning context involved. */
    position: relative;
  }
  .rstack-header__overflow-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    /* Positioning context for the unread dot below. */
    position: relative;
    /* 44px is the tap target; the four controls it replaces were 44px each. */
    min-width: 44px;
    min-height: 44px;
    padding: 0;
    border: none;
    border-radius: 8px;
    background: none;
    color: var(--rs-text-muted, #94a3b8);
    cursor: pointer;
    touch-action: manipulation;
  }
  .rstack-header__overflow-btn:active,
  .rstack-header__overflow[data-open="true"] .rstack-header__overflow-btn {
    color: var(--rs-text-primary, #e2e8f0);
    background: var(--rs-bg-hover, rgba(255,255,255,0.05));
  }
  /* Burying a bell must not bury its unread state. Each of the three counting
     components reflects `unread` onto its own host, so one :has() here is the
     whole aggregate — no JS bookkeeping and nothing to keep in sync.

     This dot is the FALLBACK, not the primary signal: the header's script sums
     the reflected `unread-count` values and inserts a numbered badge, which is
     hidden here as soon as it exists. The dot is what shows if that script
     never runs — wireHeaderOverflow() is wrapped in a try/catch precisely so a
     failure there cannot take the header down with it, and a silent failure
     must not silently drop the only sign that a DM is waiting. */
  .rstack-header__overflow:has([unread]) .rstack-header__overflow-btn::after {
    content: '';
    position: absolute;
    top: 6px;
    right: 6px;
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: #ef4444;
    pointer-events: none;
  }
  /* Must out-specify the dot rule above, not merely follow it: `:has([unread])`
     contributes its argument's specificity, so the dot selector is (0,3,0) and
     a plain `.btn:has(.badge)` at (0,2,0) loses however late it is written. */
  .rstack-header__overflow:has([unread]) .rstack-header__overflow-btn:has(.rstack-header__overflow-badge)::after {
    content: none;
  }
  /* A count, not a status light. At 320px the offline indicator's own dot sits
     about 30px to the left of this button, so an anonymous 8px dot here reads
     as a second connection light rather than as waiting messages. */
  .rstack-header__overflow-badge {
    position: absolute;
    top: 2px;
    right: 2px;
    min-width: 16px;
    height: 16px;
    padding: 0 4px;
    box-sizing: border-box;
    border-radius: 8px;
    background: #ef4444;
    color: #fff;
    font-size: 10px;
    font-weight: 700;
    line-height: 16px;
    text-align: center;
    pointer-events: none;
  }
  .rstack-header__overflow-items {
    display: none;
    position: absolute;
    top: calc(100% + 6px);
    right: 0;
    flex-direction: row;
    align-items: center;
    gap: 4px;
    padding: 6px;
    border-radius: 12px;
    background: var(--rs-bg-surface, #1e293b);
    border: 1px solid var(--rs-border, rgba(255,255,255,0.1));
    box-shadow: 0 8px 30px rgba(0,0,0,0.35);
    /* Above the header's own z-index:2 children and below the panels these
       buttons open (chat is 200), so opening one covers the tray rather than
       fighting it. */
    z-index: 100;
  }
  .rstack-header__overflow[data-open="true"] .rstack-header__overflow-items { display: flex; }
}


.rstack-header__logo {
  width: 28px;
  height: 28px;
  border-radius: 6px;
  flex-shrink: 0;
}

.rstack-header__brand {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  font-size: 1.25rem;
  font-weight: 700;
  color: inherit;
}

.rstack-header__brand-gradient {
  background: var(--rs-gradient-brand);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

/* ── Dropdown wrapper (positions panel relative to button) ── */

.rstack-header__dropdown-wrap {
  position: relative;
  display: flex;
  align-items: center;
}

/* ── Header icon buttons (settings gear, history clock) ── */

.rstack-header__settings-btn,
.rstack-header__history-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 6px;
  border: none;
  border-radius: 6px;
  background: none;
  color: var(--rs-text-secondary);
  cursor: pointer;
  transition: color 0.15s, background 0.15s;
  pointer-events: auto;
  position: relative;
}

.rstack-header__settings-btn:hover,
.rstack-header__history-btn:hover {
  color: var(--rs-text-primary);
  background: var(--rs-btn-secondary-bg, rgba(255,255,255,0.08));
}

.rstack-header__history-btn.active {
  color: #fff;
  background: var(--rs-accent, #14b8a6);
}

/* ── Tab row (below header) ── */

.rstack-tab-row {
  position: fixed;
  top: 53px; /* overlap header bottom border to close gap */
  left: 0;
  right: 0;
  z-index: 9998;
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--rs-border-subtle);
  background: var(--rs-glass-bg);
  display: flex;
  align-items: center;
  padding: 0; /* no horizontal padding — span full width */
}

/* ── Main content area ── */

#app {
  padding-top: 89px; /* Below fixed header (56px) + tab row (36px) - 3px overlap */
  /* Any in-flow banner above #app shortens the space it actually has. Without
     subtracting it, #app renders past the bottom of the viewport and clips that
     much of every rApp away behind its own overflow:hidden — for rTime that was
     the rTasks drop-target board. */
  height: calc(100vh - var(--rs-banner-h, 0px));
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

/* .rapp-content fills below subnav/tabbar — scrollable for landing pages, app views fill exactly */
.rapp-content {
  flex: 1;
  min-height: 0;
  overflow: auto;
  position: relative;
  display: flex;
  flex-direction: column;
}
/* When a single child (app view component), fill the viewport */
.rapp-content > :only-child {
  flex: 1;
  min-height: 0;
}
/* Tab panes: active pane fills, hidden ones don't participate in flex */
.rapp-content > .rspace-tab-pane--active {
  flex: 1;
  min-height: 0;
}

/* ── Standalone mode (no app/space switcher) ── */

.rstack-header--standalone .rstack-header__left {
  gap: 0;
}

/* ── Shared in-app navigation bar (used by module components) ── */

.rapp-nav {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 16px;
  padding: 0;
  min-height: 36px;
}

.rapp-nav__back {
  padding: 4px 10px;
  border-radius: 6px;
  border: 1px solid var(--rs-border);
  background: transparent;
  color: var(--rs-text-secondary);
  cursor: pointer;
  font-size: 13px;
  text-decoration: none;
  transition: color 0.15s, border-color 0.15s;
}

.rapp-nav__back:hover {
  color: var(--rs-text-primary);
  border-color: var(--rs-border-strong);
}

.rapp-nav__title {
  font-size: 15px;
  font-weight: 600;
  color: var(--rs-text-primary);
  flex: 1;
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.rapp-nav__actions {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-shrink: 0;
}

.rapp-nav__btn {
  padding: 6px 14px;
  border-radius: 6px;
  border: none;
  background: var(--rs-primary);
  color: #fff;
  font-weight: 600;
  cursor: pointer;
  font-size: 13px;
  transition: background 0.15s;
}

.rapp-nav__btn:hover {
  background: var(--rs-primary-hover);
}

.rapp-nav__btn--secondary {
  background: transparent;
  border: 1px solid var(--rs-border);
  color: var(--rs-text-secondary);
}

.rapp-nav__btn--secondary:hover {
  border-color: var(--rs-border-strong);
  color: var(--rs-text-primary);
}

.rapp-nav__badge {
  font-size: 11px;
  font-weight: 600;
  color: var(--rs-warning);
  background: rgba(251,191,36,0.15);
  border: 1px solid rgba(251,191,36,0.3);
  border-radius: 4px;
  padding: 2px 8px;
}

/* ── Iframe embed for external apps ── */

.rspace-iframe-wrap {
  position: fixed;
  top: 92px; /* header 56px + tab row 36px */
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 1;
}

.rspace-iframe {
  width: 100%;
  height: 100%;
  border: none;
  background: var(--rs-bg-page);
}

.rspace-iframe-loading {
  position: absolute;
  top: 0; left: 0; right: 0; bottom: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 12px;
  background: var(--rs-bg-page);
  color: var(--rs-text-secondary);
  font-size: 0.9rem;
  z-index: 2;
}

.rspace-iframe-spinner {
  width: 32px;
  height: 32px;
  border: 3px solid var(--rs-spinner-track);
  border-top-color: var(--rs-spinner-head);
  border-radius: 50%;
  animation: rspace-spin 0.8s linear infinite;
}

@keyframes rspace-spin {
  to { transform: rotate(360deg); }
}

.rspace-iframe-newtab {
  position: absolute;
  bottom: 12px;
  right: 16px;
  font-size: 0.72rem;
  color: var(--rs-text-muted);
  text-decoration: none;
  padding: 4px 10px;
  border-radius: 4px;
  background: var(--rs-glass-bg);
  border: 1px solid var(--rs-glass-border);
  z-index: 3;
  transition: color 0.15s, border-color 0.15s;
}

.rspace-iframe-newtab:hover {
  color: var(--rs-text-primary);
  border-color: var(--rs-border-strong);
}

/* "Open Full App" button used in module demo views */
.rapp-nav__btn--app-toggle {
  background: var(--rs-gradient-primary);
  color: #fff;
  font-size: 0.78rem;
  padding: 5px 14px;
  border-radius: 6px;
  text-decoration: none;
  font-weight: 600;
  border: none;
  cursor: pointer;
  transition: opacity 0.15s;
}
.rapp-nav__btn--app-toggle:hover {
  opacity: 0.88;
}

/* ── Sidebar push offsets ── */

rstack-user-dashboard,
.rspace-iframe-wrap,
#toolbar {
  transition: margin-left 0.25s ease, left 0.25s ease;
}

body.rstack-sidebar-open .rstack-tab-row {
  left: 280px;
}

body.rstack-sidebar-open #app {
  margin-left: 280px;
}

body.rstack-sidebar-open rstack-user-dashboard {
  left: 280px;
}

body.rstack-sidebar-open .rspace-iframe-wrap {
  left: 280px;
}

body.rstack-sidebar-open #toolbar {
  left: 292px; /* 280px sidebar + 12px original margin */
}

/* ── Mobile adjustments ── */

@media (max-width: 640px) {
  .rapp-info-btn { display: none; }
  /* Switch header + tab row from fixed to sticky on mobile.
     This avoids needing a magic padding-top on #app and lets
     the header wrap naturally to two rows. */
  .rstack-header {
    position: sticky;
    z-index: 9999;
    padding: calc(6px + env(safe-area-inset-top)) max(12px, env(safe-area-inset-right)) 6px max(12px, env(safe-area-inset-left));
    height: auto;
    flex-wrap: wrap;
    gap: 0;
  }
  .rstack-header__left {
    flex: 1 1 0;
    min-width: 0;
    gap: 2px;
  }
  .rstack-header__center {
    order: 3;
    flex-basis: 100%;
    padding: 4px 0 2px;
    display: flex;
  }
  .rstack-header__right {
    flex: 0 0 auto;
    gap: 6px;
    margin-left: auto;
  }
  .rstack-header__brand {
    font-size: 1rem;
    gap: 6px;
  }
  .rstack-header__logo {
    width: 24px;
    height: 24px;
  }
  .rstack-tab-row {
    position: sticky;
    top: 0;
  }
  /* Mobile: body becomes flex column so #app fills below sticky header/tabs */
  html, body {
    height: 100dvh;
    overflow: hidden;
    overscroll-behavior: none;
  }
  body {
    display: flex;
    flex-direction: column;
  }
  .rstack-header {
    flex-shrink: 0;
  }
  .rstack-tab-row {
    flex-shrink: 0;
  }
  #app {
    padding-top: 0;
    height: auto;
    flex: 1;
    min-height: 0;
  }
  .rspace-iframe-wrap {
    position: relative;
    top: 0;
    width: 100%;
    flex: 1;
    min-height: 400px;
  }
  .rapp-nav {
    flex-wrap: wrap;
    gap: 6px;
  }
  /* Hide settings/history on mobile — accessible via identity dropdown */
  .rstack-header__settings-btn,
  .rstack-header__history-btn { display: none; }
  /* Hide the verbose presence pill on mobile — when the header wraps it's wide
     enough (👥 N here · just you · go offline) to overlap the logo. The
     collab-overlay badge + offline indicator already convey presence on small
     screens. */
  .rstack-header__right > folk-presence { display: none; }
  /* Sidebar overlays on mobile — no push offsets */
  body.rstack-sidebar-open .rstack-tab-row { left: 0; }
  body.rstack-sidebar-open #app { margin-left: 0; }
  body.rstack-sidebar-open rstack-user-dashboard { left: 0; }
  body.rstack-sidebar-open .rspace-iframe-wrap { left: 0; }
  body.rstack-sidebar-open #toolbar { left: 12px; }
  .rapp-nav__btn, .rapp-nav__back { min-height: 36px; }
}

@media (max-width: 480px) {
  #app {
    padding-left: 8px;
    padding-right: 8px;
  }
}

/* ── Very narrow phones (iPhone SE and friends, 320-360px) ──
   At 320px the left cluster is ~13px over budget, so the space name — the one
   piece of context telling you WHERE you are — was clipped mid-word by the
   overflow backstop above. Buy the width back from chrome padding and gaps
   rather than by dropping a control: the app-switcher badge is also the only
   way to open the sidebar, so hiding it would strand the user. */
@media (max-width: 360px) {
  .rstack-header {
    padding-left: max(8px, env(safe-area-inset-left));
    padding-right: max(8px, env(safe-area-inset-right));
  }
  .rstack-header__left { gap: 2px; }
  .rstack-header__right { gap: 8px; }
}

/* ── Short viewports (a phone held sideways) ──
   The mobile block above keys on width only, so an 844x390 landscape phone got
   the full desktop chrome: banner 36 + header 56 + tab row 45 = 137px of a
   390px-tall viewport, 35% of the screen, before the rApp drew anything. Height
   is the axis that matters here, so key on it. */
@media (max-height: 500px) and (orientation: landscape) {
  .rstack-header {
    height: 44px;
    padding-top: 0;
  }
  .rstack-header__logo { width: 22px; height: 22px; }
  /* mi is a full search surface; on a 390px-tall screen it is the first thing
     that should yield. It stays reachable from the app switcher sidebar. */
  .rstack-header__center { display: none; }
  .rstack-tab-row { top: 41px; }
  #app { padding-top: 77px; }
  /* The guest banner is inline-styled from server/shell.ts, so overriding its
     padding needs the same weight. Its height is measured into --rs-banner-h at
     runtime, so trimming it here gives the rApp the space back rather than just
     moving the clipping somewhere else. Tap targets are NOT reduced — a short
     screen is still a touch screen. */
  #guest-sandbox-banner {
    padding: 4px 12px !important;
    font-size: 0.8rem !important;
    gap: 8px !important;
  }
}

/* ── Touch and pen accommodations, keyed on the pointer rather than the width ──
   Everything above keys on max-width:640px, so a tablet or a pen-driven
   2-in-1 at 768-1180px wide was served the desktop header: 16px icons and
   sub-44px targets on a device with no hover and a fingertip for a cursor.
   These rules are additive and cannot reach a mouse-driven desktop. */
@media (pointer: coarse) {
  .rstack-header__settings-btn,
  .rstack-header__history-btn {
    min-width: 44px;
    min-height: 44px;
    padding: 0;
  }
  .rstack-header__settings-btn svg,
  .rstack-header__history-btn svg {
    width: 22px;
    height: 22px;
  }
  .rapp-nav__btn,
  .rapp-nav__back {
    min-height: 44px;
  }
  .rapp-minimize-btn {
    width: 44px;
    height: 44px;
  }
  /* Kills the 300ms synthetic-click delay on every piece of shell chrome. */
  .rstack-header button,
  .rstack-header a,
  .rstack-tab-row button,
  .rapp-nav__btn,
  .rapp-nav__back,
  .rapp-minimize-btn {
    touch-action: manipulation;
  }
}

/* A stylus is a FINE pointer with no hover. Rules gated on hover:hover would
   silently skip it, so anything that only appears on hover needs a fallback. */
@media (hover: none) {
  .hover-reveal { opacity: 0.5; }
  .hover-reveal:active { opacity: 1; }
}

/* ── Tab pane caching (show/hide) ── */

.rspace-tab-pane {
  display: none;
}

/* Active panes must be flex columns so subnav/tabbar/rapp-content
   flex properties work after TabCache.init() wraps them into a pane */
.rspace-tab-pane--active {
  display: flex;
  flex-direction: column;
  flex: 1;
  min-height: 0;
}

.rspace-tab-loading {
  display: flex;
  align-items: center;
  justify-content: center;
  flex: 1;
  min-height: 0;
}

.rspace-tab-spinner {
  width: 32px;
  height: 32px;
  border: 3px solid var(--rs-spinner-track);
  border-top-color: var(--rs-spinner-head);
  border-radius: 50%;
  animation: rspace-spin 0.8s linear infinite;
}

/* ── Touch-device utilities ── */
@media (pointer: coarse) {
  .hover-reveal { opacity: 0.5 !important; }
  .hover-reveal:active { opacity: 1 !important; }
}

/* ── Header minimize toggle (lives in .rapp-subnav) ── */

.rapp-minimize-btn {
  display: flex; align-items: center; justify-content: center;
  width: 24px; height: 24px; padding: 0;
  margin-left: auto; /* push to right edge of subnav */
  flex-shrink: 0;
  background: none; border: 1px solid transparent; border-radius: 6px;
  color: var(--rs-text-muted); cursor: pointer;
  transition: color 0.15s, background 0.15s, border-color 0.15s;
}
.rapp-minimize-btn:hover {
  color: var(--rs-text-primary); background: var(--rs-bg-hover); border-color: var(--rs-border);
}
.rapp-minimize-btn svg {
  transition: transform 0.25s ease;
}
body.rspace-headers-minimized .rapp-minimize-btn svg {
  transform: rotate(180deg);
}

/* Minimized state: hide all 3 header bars, floating restore button.
 * Use visibility/height instead of transform — when a parent has a
 * transform, fixed-positioned children (including the maximize button
 * inside .rapp-subnav) become relative to the transformed container
 * instead of the viewport, so the button gets translated off-screen
 * too and becomes unclickable. visibility+height keeps the layout
 * collapsed but leaves any `position: fixed` child anchored to the
 * viewport. */
body.rspace-headers-minimized .rstack-header {
  visibility: hidden;
  height: 0;
  min-height: 0;
  padding: 0;
  border: 0;
  overflow: hidden;
  pointer-events: none;
}
body.rspace-headers-minimized .rstack-tab-row {
  visibility: hidden;
  height: 0;
  min-height: 0;
  padding: 0;
  border: 0;
  overflow: hidden;
  pointer-events: none;
}
body.rspace-headers-minimized .rapp-subnav {
  visibility: hidden;
  height: 0;
  min-height: 0;
  padding: 0;
  border: 0;
  overflow: visible; /* let the fixed-positioned restore button render */
  pointer-events: none;
  opacity: 1; /* restore button child re-enables visibility below */
}
/* The minimize button stays clickable when its parent .rapp-subnav is
 * collapsed — it gets `position: fixed` + visibility: visible to escape
 * the parent's `visibility: hidden` cascade. */
body.rspace-headers-minimized .rapp-minimize-btn {
  visibility: visible;
}
body.rspace-headers-minimized #app {
  padding-top: 0;
}
body.rspace-headers-minimized #app.canvas-layout {
  padding-top: 0;
}
/* Floating restore button when all headers minimized */
body.rspace-headers-minimized .rapp-minimize-btn {
  position: fixed;
  top: 6px;
  right: 12px;
  z-index: 10000;
  pointer-events: auto;
  width: 28px;
  height: 28px;
  background: var(--rs-glass-bg);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--rs-border);
  border-radius: 8px;
  opacity: 0.6;
  transition: opacity 0.15s;
}
body.rspace-headers-minimized .rapp-minimize-btn:hover {
  opacity: 1;
}

/* Smooth transitions for header minimize/restore */
.rstack-header {
  transition: transform 0.25s ease, top 0.3s ease-out;
}
.rstack-tab-row {
  transition: margin-left 0.25s ease, left 0.25s ease, transform 0.25s ease, top 0.3s ease-out;
}
.rapp-subnav {
  transition: transform 0.25s ease, opacity 0.25s ease;
}
#app {
  transition: margin-left 0.25s ease, left 0.25s ease, padding-top 0.3s ease-out;
}

/* Mobile: minimized state adjustments (sticky, not fixed) */
@media (max-width: 640px) {
  body.rspace-headers-minimized .rstack-header {
    max-height: 0;
    overflow: hidden;
    padding: 0;
    border: 0;
  }
  body.rspace-headers-minimized .rstack-tab-row {
    max-height: 0;
    overflow: hidden;
    transform: none;
  }
  body.rspace-headers-minimized .rapp-subnav {
    max-height: 0;
    overflow: hidden;
    transform: none;
    opacity: 0;
  }
}

/* ── Flex gap fallback for Safari <14.1 ── */
@supports not (gap: 1px) {
  .rstack-header__left > * + * { margin-left: 4px; }
  .rstack-header__right > * + * { margin-left: 12px; }
  .rstack-header__brand { gap: 0; }
  .rstack-header__brand > * + * { margin-left: 10px; }
  .rspace-banner > * + * { margin-left: 12px; }
  .rapp-nav > * + * { margin-left: 8px; }
  .rapp-nav__actions > * + * { margin-left: 8px; }
}

/* ── Mobile / touch baseline (applies to all modules) ──
   iOS Safari auto-zooms on focus for <input>/<select>/<textarea> if
   computed font-size < 16px. Force ≥16px on pointer:coarse devices.
   Also enforce a 44×44 minimum hit area per Apple HIG on touch screens. */

@media (pointer: coarse) {
  input:not([type="checkbox"]):not([type="radio"]):not([type="range"]):not([type="color"]),
  select,
  textarea {
    font-size: max(16px, 1rem);
  }

  button,
  [role="button"],
  a.rapp-nav__btn,
  a.rapp-nav__back,
  .btn,
  .rapp-nav__btn,
  .rapp-nav__back,
  summary {
    min-height: 44px;
    min-width: 44px;
  }

  /* Inline/icon-only buttons inside dense toolbars may opt out with
     class="btn--dense" — still targetable but won't bloat toolbars. */
  .btn--dense,
  [role="button"].btn--dense {
    min-height: 36px;
    min-width: 36px;
  }

  /* Kill 300ms tap-delay and blue highlight across the board */
  a, button, [role="button"], input[type="submit"], input[type="button"],
  .rapp-nav__btn, .rapp-nav__back, summary, label {
    touch-action: manipulation;
    -webkit-tap-highlight-color: transparent;
  }
}

/* ── Utility classes for modules ── */

/* Horizontal scroller with visible thumb on touch (for rsheets, data tables) */
.rapp-hscroll {
  overflow-x: auto;
  overflow-y: hidden;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: thin;
}
.rapp-hscroll::-webkit-scrollbar {
  height: 8px;
}
.rapp-hscroll::-webkit-scrollbar-thumb {
  background: var(--rs-border-strong, rgba(128,128,128,0.5));
  border-radius: 4px;
}

/* Bottom-sheet drawer helper (for rmaps, rnotes panel collapse) */
.rapp-drawer {
  position: fixed;
  left: 0; right: 0;
  background: var(--rs-bg-page);
  border-top: 1px solid var(--rs-border);
  box-shadow: 0 -4px 16px rgba(0,0,0,0.18);
  transition: transform 0.25s ease;
  z-index: 1000;
  padding-bottom: env(safe-area-inset-bottom);
}
.rapp-drawer--bottom {
  bottom: 0;
  max-height: 70dvh;
  overflow-y: auto;
  border-radius: 16px 16px 0 0;
}
.rapp-drawer--collapsed {
  transform: translateY(calc(100% - 40px));
}
.rapp-drawer__handle {
  display: flex;
  justify-content: center;
  padding: 8px 0 4px;
  cursor: grab;
  touch-action: none;
}
.rapp-drawer__handle::before {
  content: "";
  width: 40px;
  height: 4px;
  border-radius: 2px;
  background: var(--rs-border-strong, rgba(128,128,128,0.6));
}

/* ── Mobile legibility (icons + readable text floor) ──
   The prior touch sweep made things *tappable* (44px targets, 16px inputs).
   This layer makes them *legible*: touch screens pack 2-3× the px/inch of a
   desktop monitor, so 16-18px icons and sub-13px chrome text read as tiny.
   Bump both on coarse pointers ONLY — desktop (fine pointer) is untouched.
   `max()` is used so anything already larger is never shrunk. */
@media (pointer: coarse) {
  /* Light-DOM chrome icons (history/settings/back/nav buttons). Custom
     elements with their own shadow DOM — app-switcher, identity, etc. —
     are not reached here and are handled inside their components. */
  .rstack-header > * > button svg,
  .rstack-header__left button svg,
  .rstack-header__right button svg,
  .rapp-subnav button svg,
  .rapp-nav button svg,
  .rapp-nav__btn svg,
  .rapp-nav__back svg {
    width: 22px;
    height: 22px;
  }

  /* NOTE: deliberately NOT setting font-size on the chrome *containers*
     (.rstack-header / .rapp-nav / bare `small`) — those usually inherit
     16px, so a blanket floor would *shrink* them. Real sub-13px text is
     bumped at its source (canvas chrome + shadow-DOM components) where the
     actual small value is known. */
}