/* HH Galaxy persistent chrome enhancer v1. Every rule is shell-scoped. */

[data-galaxy-shell] {
  --header-h: 68px;
  --sidebar-w: 248px;
  /* Keep the visual rail and the legacy app-shell grid in lockstep. The
     existing shell uses --sidebar-width while Galaxy uses --sidebar-w; if
     only the latter changes, a transparent gap appears between the rail and
     the outlet and labels get squeezed into a few pixels. */
  --sidebar-width: var(--sidebar-w);
  --rail-w: 72px;
  --library-w: 292px;
  --inspector-w: 320px;
  --dock-h: 84px;
  --layout-gap: 14px;
  position: relative;
  isolation: isolate;
  min-width: 0;
  min-height: 100dvh;
  overflow: clip;
  background:
    radial-gradient(circle at 68% 20%, rgb(76 29 149 / 15%), transparent 34%),
    linear-gradient(145deg, var(--galaxy-bg-deep), var(--galaxy-bg) 52%, #02040c);
}

[data-galaxy-shell][data-galaxy-layout="atlas"] {
  --sidebar-w: 272px;
  --sidebar-width: var(--sidebar-w);
  --layout-gap: 12px;
}

[data-galaxy-shell][data-galaxy-layout="standard"] {
  --sidebar-w: 248px;
  --sidebar-width: var(--sidebar-w);
  --layout-gap: 14px;
}

[data-galaxy-shell][data-galaxy-layout="dashboard"] {
  --sidebar-w: 248px;
  --sidebar-width: var(--sidebar-w);
  --layout-gap: 12px;
}

[data-galaxy-shell][data-galaxy-layout="three-column"] {
  --sidebar-w: 232px;
  --sidebar-width: var(--sidebar-w);
  --inspector-w: 312px;
  --layout-gap: 12px;
}

[data-galaxy-shell][data-galaxy-layout="workbench"] {
  /* Editors still expose the full product navigation. A compact rail is
     reserved for the explicit tablet breakpoint below; keeping a readable
     desktop rail prevents labels from wrapping into single characters. */
  --sidebar-w: 248px;
  --sidebar-width: var(--sidebar-w);
  --library-w: 252px;
  --inspector-w: 304px;
  --layout-gap: 8px;
}

[data-galaxy-shell][data-galaxy-layout="media-dock"] {
  --sidebar-w: 232px;
  --sidebar-width: var(--sidebar-w);
  --dock-h: 96px;
  --layout-gap: 12px;
}

[data-galaxy-shell][data-galaxy-layout="desktop"] {
  --header-h: 64px;
  --sidebar-w: 0px;
  --sidebar-width: var(--sidebar-w);
  --dock-h: 76px;
  --layout-gap: 10px;
}

[data-galaxy-shell] > [data-galaxy-effect-owner="shell"] {
  position: fixed;
  z-index: 0;
  inset: 0;
  overflow: hidden;
  pointer-events: none;
  opacity: 0.66;
  contain: strict;
  transition: opacity 600ms ease;
}

[data-galaxy-shell] > [data-galaxy-effect-owner="shell"]::before,
[data-galaxy-shell] > [data-galaxy-effect-owner="shell"]::after {
  position: absolute;
  inset: -18%;
  content: "";
  will-change: transform, opacity;
}

[data-galaxy-shell] > [data-galaxy-effect-owner="shell"]::before {
  background-image:
    radial-gradient(circle at 18% 23%, rgb(56 189 248 / 70%) 0 1px, transparent 1.6px),
    radial-gradient(circle at 72% 31%, rgb(168 85 247 / 72%) 0 1px, transparent 1.8px),
    radial-gradient(circle at 45% 79%, rgb(246 247 255 / 60%) 0 1px, transparent 1.7px);
  background-size: 127px 131px, 193px 179px, 89px 97px;
  opacity: 0.32;
  animation: galaxy-shell-star-drift 72s linear infinite;
}

[data-galaxy-shell] > [data-galaxy-effect-owner="shell"]::after {
  background:
    radial-gradient(ellipse at 72% 28%, rgb(124 58 237 / 17%), transparent 28%),
    radial-gradient(ellipse at 22% 72%, rgb(14 165 233 / 11%), transparent 25%);
  filter: blur(28px);
  opacity: 0.56;
  animation: galaxy-shell-nebula-breathe 7s ease-in-out infinite alternate;
}

[data-galaxy-shell][data-galaxy-effects="paused"] > [data-galaxy-effect-owner="shell"],
[data-galaxy-shell][data-galaxy-media-active="true"] > [data-galaxy-effect-owner="shell"] {
  opacity: 0.12;
}

[data-galaxy-shell][data-galaxy-effects="paused"] > [data-galaxy-effect-owner="shell"]::before,
[data-galaxy-shell][data-galaxy-effects="paused"] > [data-galaxy-effect-owner="shell"]::after,
[data-galaxy-shell][data-galaxy-media-active="true"] > [data-galaxy-effect-owner="shell"]::before,
[data-galaxy-shell][data-galaxy-media-active="true"] > [data-galaxy-effect-owner="shell"]::after {
  animation-play-state: paused;
}

[data-galaxy-shell] > :is(.app-header, .app-shell__body) {
  position: relative;
  z-index: 1;
}

[data-galaxy-shell] [data-galaxy-chrome="topbar"] {
  min-height: var(--header-h);
  border-bottom: 1px solid var(--galaxy-border);
  background: rgb(2 6 17 / 82%);
  box-shadow: 0 12px 38px rgb(0 0 0 / 20%);
  backdrop-filter: blur(22px) saturate(138%);
}

[data-galaxy-shell] [data-galaxy-chrome="topbar"] :where(.app-brand, .app-user-button, .app-icon-button, .app-global-search) {
  min-height: var(--galaxy-control-min);
  border-color: var(--galaxy-border);
}

[data-galaxy-shell] [data-galaxy-chrome="topbar"] .app-global-search {
  width: min(100%, 484px);
  background: rgb(7 17 32 / 76%);
  color: var(--galaxy-text-secondary);
}

[data-galaxy-shell] [data-galaxy-chrome="navigation"] {
  width: 100%;
  min-width: 0;
  border-right: 1px solid var(--galaxy-border);
  background: linear-gradient(180deg, rgb(4 10 24 / 95%), rgb(3 8 18 / 92%));
  box-shadow: 14px 0 40px rgb(0 0 0 / 17%);
  backdrop-filter: blur(20px) saturate(128%);
}

/* The legacy shell and Galaxy use different variable names for the same grid
   track. Own the track at the enhancer boundary so a profile cannot leave a
   dead strip between the navigation and route outlet. Collapsed/auto-hide
   states retain the legacy rail width and remain user-controlled. */
[data-galaxy-shell] > .app-shell__body {
  grid-template-columns: var(--sidebar-w) minmax(0, 1fr) !important;
}

body.app-sidebar-collapsed [data-galaxy-shell] > .app-shell__body,
body.app-sidebar-labels-hidden [data-galaxy-shell] > .app-shell__body,
body.app-sidebar-auto-hide:not(.app-sidebar-collapsed) [data-galaxy-shell] > .app-shell__body {
  grid-template-columns: var(--sidebar-collapsed-width, var(--rail-w)) minmax(0, 1fr) !important;
}

body.app-sidebar-auto-hide:not(.app-sidebar-collapsed) [data-galaxy-shell] > .app-shell__body:has(.app-sidebar:hover) {
  grid-template-columns: var(--sidebar-w) minmax(0, 1fr) !important;
}

[data-galaxy-shell] [data-galaxy-chrome="navigation"] :where(button, [href]) {
  min-height: var(--galaxy-control-min);
}

[data-galaxy-shell] [data-galaxy-chrome="navigation"] :where(.is-active, [aria-current="page"]) {
  border-color: color-mix(in srgb, var(--galaxy-color-accent) 42%, transparent);
  background: linear-gradient(100deg, color-mix(in srgb, var(--galaxy-color-accent) 25%, transparent), rgb(59 130 246 / 12%));
  color: var(--galaxy-text);
  box-shadow: inset 2px 0 var(--galaxy-color-accent), 0 0 24px color-mix(in srgb, var(--galaxy-color-accent) 10%, transparent);
}

[data-galaxy-shell] [data-galaxy-chrome="outlet"] {
  min-width: 0;
  min-height: 0;
  color: var(--galaxy-text);
  scrollbar-color: rgb(139 92 246 / 62%) rgb(7 17 32 / 45%);
  scrollbar-width: thin;
}

[data-galaxy-shell] [data-galaxy-outlet] {
  min-width: 0;
  max-width: none;
  overflow-x: clip;
}

/* Immersive Galaxy workspaces provide their own semantic title/tool region.
   The persistent header and sidebar remain mounted; only the redundant legacy
   breadcrumb/page banner is removed and the outlet receives the full canvas. */
[data-galaxy-shell]:is(
  [data-galaxy-route="/home"],
  [data-galaxy-route="/home/dashboard"],
  [data-galaxy-route="/create/ai-center"],
  [data-galaxy-route^="/chat-ai"],
  [data-galaxy-route="/create/workflow"],
  [data-galaxy-route="/work/automation-lab"],
  [data-galaxy-route="/work/projects-tasks"],
  [data-galaxy-route="/communication/community"],
  [data-galaxy-route="/music/ambient"],
  [data-galaxy-route="/system/desktop"]
) :is(.app-breadcrumb, .app-page-header, .app-context-bar) {
  display: none !important;
}

[data-galaxy-shell]:is(
  [data-galaxy-route="/home"],
  [data-galaxy-route="/home/dashboard"],
  [data-galaxy-route="/create/ai-center"],
  [data-galaxy-route^="/chat-ai"],
  [data-galaxy-route="/create/workflow"],
  [data-galaxy-route="/work/automation-lab"],
  [data-galaxy-route="/work/projects-tasks"],
  [data-galaxy-route="/communication/community"],
  [data-galaxy-route="/music/ambient"],
  [data-galaxy-route="/system/desktop"]
) .app-workspace {
  width: 100%;
  max-width: none;
  padding: 0;
}

[data-galaxy-shell] [data-galaxy-layout-region="library"] {
  width: var(--library-w);
  min-width: 0;
}

[data-galaxy-shell] [data-galaxy-layout-region="inspector"] {
  width: var(--inspector-w);
  min-width: 0;
}

[data-galaxy-shell] [data-galaxy-layout-region="dock"] {
  min-height: var(--dock-h);
}

[data-galaxy-shell] :where([data-galaxy-grid], .galaxy-grid) {
  display: grid;
  min-width: 0;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 240px), 1fr));
  gap: var(--layout-gap);
}

[data-galaxy-shell] [data-galaxy-capability]:not([data-galaxy-capability="ready"]) [data-galaxy-requires-ready] {
  cursor: not-allowed;
  opacity: 0.58;
}

[data-galaxy-shell] [data-galaxy-capability="loading"] {
  cursor: progress;
}

[data-galaxy-shell] [data-galaxy-capability="error"] {
  border-color: color-mix(in srgb, var(--galaxy-danger) 42%, var(--galaxy-border));
}

@keyframes galaxy-shell-star-drift {
  to { transform: translate3d(7%, 5%, 0) rotate(0.01deg); }
}

@keyframes galaxy-shell-nebula-breathe {
  from { transform: scale(0.98) translate3d(-1%, 0, 0); opacity: 0.42; }
  to { transform: scale(1.04) translate3d(1%, -1%, 0); opacity: 0.68; }
}

@media (max-width: 1439px) {
  [data-galaxy-shell] {
    --sidebar-w: 224px;
    --sidebar-width: var(--sidebar-w);
    --inspector-w: min(360px, calc(100vw - 32px));
  }

  [data-galaxy-shell] [data-galaxy-layout-region="inspector"] {
    position: fixed;
    z-index: 30;
    top: calc(var(--header-h) + 10px);
    right: 10px;
    bottom: 10px;
    max-width: calc(100vw - 20px);
    overflow: auto;
  }
}

@media (max-width: 1179px) {
  [data-galaxy-shell][data-galaxy-layout]:not([data-galaxy-layout="desktop"]) {
    --sidebar-w: 224px;
    --sidebar-width: var(--sidebar-w);
    --layout-gap: 12px;
  }

  [data-galaxy-shell] [data-galaxy-chrome="topbar"] {
    grid-template-columns: minmax(170px, 0.65fr) minmax(220px, 1fr) auto;
  }

  [data-galaxy-shell] :where([data-galaxy-grid], .galaxy-grid) {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 767px) {
  [data-galaxy-shell][data-galaxy-layout] {
    --header-h: 56px;
    --sidebar-w: min(88vw, 336px);
    --sidebar-width: var(--sidebar-w);
    --dock-h: 72px;
    --layout-gap: 10px;
    overflow-x: clip;
    overflow-y: visible;
  }

  /* On phones the legacy navigation is an off-canvas bottom sheet, not a
     persistent grid column. Keep the route outlet full width regardless of
     the desktop profile selected for the current route. */
  [data-galaxy-shell] > .app-shell__body,
  body.app-sidebar-collapsed [data-galaxy-shell] > .app-shell__body,
  body.app-sidebar-labels-hidden [data-galaxy-shell] > .app-shell__body,
  body.app-sidebar-auto-hide [data-galaxy-shell] > .app-shell__body {
    grid-template-columns: minmax(0, 1fr) !important;
    grid-template-rows: minmax(0, 1fr);
  }

  [data-galaxy-shell] [data-galaxy-chrome="topbar"] {
    min-height: var(--header-h);
    padding-right: max(8px, env(safe-area-inset-right));
    padding-left: max(8px, env(safe-area-inset-left));
    grid-template-columns: auto minmax(0, 1fr) auto;
  }

  [data-galaxy-shell] [data-galaxy-chrome="topbar"] .app-global-search {
    width: 44px;
    min-width: 44px;
    padding: 0;
  }

  [data-galaxy-shell] [data-galaxy-chrome="topbar"] .app-global-search :where(span:nth-child(2), kbd),
  [data-galaxy-shell] [data-galaxy-chrome="topbar"] :where(.app-live-status, .app-user-button strong, .app-user-button i) {
    display: none;
  }

  [data-galaxy-shell] [data-galaxy-chrome="navigation"] {
    width: var(--sidebar-w);
    max-width: calc(100vw - 24px);
    padding-bottom: env(safe-area-inset-bottom);
  }

  /* The compact tablet rail visually hides labels. Restore them inside the
     mobile sheet so opening navigation always exposes readable destinations. */
  [data-galaxy-shell] [data-galaxy-chrome="navigation"] :where(.app-sidebar__item > b, .app-sidebar__subitem b, .app-sidebar__count, .app-sidebar__chevron) {
    position: static;
    width: auto;
    height: auto;
    clip: auto;
    clip-path: none;
  }

  [data-galaxy-shell] [data-galaxy-chrome="navigation"] :where(.app-sidebar__item > b, .app-sidebar__subitem b) {
    overflow: hidden;
    white-space: normal;
  }

  [data-galaxy-shell] [data-galaxy-chrome="navigation"] :where(.app-sidebar__count, .app-sidebar__chevron) {
    overflow: visible;
    white-space: nowrap;
  }

  [data-galaxy-shell] [data-galaxy-chrome="outlet"] {
    padding-right: max(0px, env(safe-area-inset-right));
    padding-left: max(0px, env(safe-area-inset-left));
  }

  [data-galaxy-shell] :where([data-galaxy-grid], .galaxy-grid) {
    grid-template-columns: minmax(0, 1fr);
  }

  [data-galaxy-shell] [data-galaxy-layout-region="inspector"] {
    top: auto;
    right: 0;
    bottom: 0;
    left: 0;
    width: auto;
    max-width: none;
    max-height: min(78dvh, 680px);
    padding-bottom: env(safe-area-inset-bottom);
    border-radius: 18px 18px 0 0;
  }

  /* Privacy remains an independent feature, but its first-run action row is
     visible above Galaxy's mobile dock. Let long Vietnamese labels wrap
     instead of increasing the grid's min-content width beyond the viewport. */
  body:has([data-galaxy-shell]) .hh-consent-banner > div {
    min-width: 0;
  }

  body:has([data-galaxy-shell]) .hh-consent-banner {
    box-sizing: border-box;
    max-width: calc(100vw - 20px);
  }

  body:has([data-galaxy-shell]) .hh-consent-banner > div:last-child {
    display: grid;
    width: auto;
    max-width: 100%;
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  body:has([data-galaxy-shell]) .hh-consent-banner button {
    width: 100%;
    min-width: 0;
    white-space: normal;
    overflow-wrap: anywhere;
  }

  body:has([data-galaxy-shell]) .hh-consent-banner > div:last-child > button.primary:last-child {
    grid-column: 1 / -1;
  }
}

@media (prefers-reduced-motion: reduce) {
  [data-galaxy-shell] > [data-galaxy-effect-owner="shell"]::before,
  [data-galaxy-shell] > [data-galaxy-effect-owner="shell"]::after {
    animation: none;
  }

  [data-galaxy-shell] > [data-galaxy-effect-owner="shell"] {
    opacity: 0.16;
    transition: none;
  }
}

@media (forced-colors: active) {
  [data-galaxy-shell],
  [data-galaxy-shell] [data-galaxy-chrome] {
    background: Canvas;
    color: CanvasText;
    box-shadow: none;
    forced-color-adjust: auto;
  }

  [data-galaxy-shell] > [data-galaxy-effect-owner="shell"] {
    display: none;
  }
}

/* Immersive Galaxy routes own their sidebar/topbar so the legacy application
 * chrome cannot cover their reference workspace. HH Core is still the only
 * entry from the Galaxy Map; entering it now reveals its dedicated dashboard. */
[data-galaxy-shell][data-galaxy-route^="/galaxy/"] > .app-header,
[data-galaxy-shell][data-galaxy-route^="/galaxy/"] > .app-shell__body > .app-sidebar,
[data-galaxy-shell][data-galaxy-route^="/galaxy/"] > .app-shell__body > .app-sidebar-backdrop,
[data-galaxy-shell][data-galaxy-route^="/chat-ai"] > .app-header,
[data-galaxy-shell][data-galaxy-route^="/chat-ai"] > .app-shell__body > .app-sidebar,
[data-galaxy-shell][data-galaxy-route^="/chat-ai"] > .app-shell__body > .app-sidebar-backdrop,
[data-galaxy-shell][data-galaxy-route="/home/dashboard"] > .app-header,
[data-galaxy-shell][data-galaxy-route="/home/dashboard"] > .app-shell__body > .app-sidebar,
[data-galaxy-shell][data-galaxy-route="/home/dashboard"] > .app-shell__body > .app-sidebar-backdrop,
[data-galaxy-shell][data-galaxy-route="/create/ai-center"] > .app-header,
[data-galaxy-shell][data-galaxy-route="/create/ai-center"] > .app-shell__body > .app-sidebar,
[data-galaxy-shell][data-galaxy-route="/create/ai-center"] > .app-shell__body > .app-sidebar-backdrop {
  display: none !important;
}

[data-galaxy-shell][data-galaxy-route^="/galaxy/"] > .app-shell__body,
[data-galaxy-shell][data-galaxy-route^="/chat-ai"] > .app-shell__body {
  display: block !important;
  min-height: 100dvh;
  height: 100dvh;
  overflow: hidden;
  background: transparent;
}

[data-galaxy-shell][data-galaxy-route="/home/dashboard"] > .app-shell__body,
[data-galaxy-shell][data-galaxy-route="/create/ai-center"] > .app-shell__body {
  display: block !important;
  min-height: 100dvh;
  height: 100dvh;
  overflow: hidden;
  background: transparent;
}

[data-galaxy-shell][data-galaxy-route^="/galaxy/"] > .app-shell__body > .app-main,
[data-galaxy-shell][data-galaxy-route^="/chat-ai"] > .app-shell__body > .app-main {
  width: 100%;
  min-width: 0;
  height: 100dvh;
  min-height: 0;
  overflow: auto;
  padding: 0 !important;
  background: transparent;
  scrollbar-gutter: stable;
}

[data-galaxy-shell][data-galaxy-route="/home/dashboard"] > .app-shell__body > .app-main,
[data-galaxy-shell][data-galaxy-route="/create/ai-center"] > .app-shell__body > .app-main {
  width: 100%;
  min-width: 0;
  height: 100dvh;
  min-height: 0;
  overflow: auto;
  padding: 0 !important;
  background: transparent;
  scrollbar-gutter: stable;
}

[data-galaxy-shell][data-galaxy-route^="/galaxy/"] > .app-shell__body > .app-main > .app-workspace,
[data-galaxy-shell][data-galaxy-route^="/chat-ai"] > .app-shell__body > .app-main > .app-workspace {
  width: 100%;
  min-width: 0;
  min-height: 100%;
  max-width: none;
  margin: 0;
  padding: 0;
}

[data-galaxy-shell][data-galaxy-route="/home/dashboard"] > .app-shell__body > .app-main > .app-workspace,
[data-galaxy-shell][data-galaxy-route="/create/ai-center"] > .app-shell__body > .app-main > .app-workspace {
  width: 100%;
  min-width: 0;
  min-height: 100%;
  max-width: none;
  margin: 0;
  padding: 0;
}

[data-galaxy-shell][data-galaxy-route^="/galaxy/"] :is(.app-breadcrumb, .app-page-header, .app-context-bar),
[data-galaxy-shell][data-galaxy-route^="/chat-ai"] :is(.app-breadcrumb, .app-page-header, .app-context-bar) {
  display: none !important;
}

@media (max-width: 767px) {
  [data-galaxy-shell][data-galaxy-route^="/galaxy/"] > .app-shell__body > .app-main,
  [data-galaxy-shell][data-galaxy-route^="/chat-ai"] > .app-shell__body > .app-main {
    height: 100dvh;
    overflow-x: hidden;
    overflow-y: auto;
  }
}

/* Canonical deep-links (for example /create/workflow or
 * /work/projects-tasks) use the same immersive surface as their /galaxy/*
 * entry aliases.  The shell marks them with data-galaxy-immersive so a direct
 * bookmark cannot reintroduce the legacy header/sidebar over the new view. */
[data-galaxy-shell][data-galaxy-immersive="true"] > .app-header,
[data-galaxy-shell][data-galaxy-immersive="true"] > .app-shell__body > .app-sidebar,
[data-galaxy-shell][data-galaxy-immersive="true"] > .app-shell__body > .app-sidebar-backdrop {
  display: none !important;
}

/* The legacy mobile dock lives outside #appShell. Immersive Galaxy views own
 * their own navigation and viewport-safe controls, so the duplicate dock must
 * not cover chat composers, desktop windows or bottom action bars. The dock is
 * only hidden while an immersive route is active and remains available on all
 * standard application routes. */
body.app-shell-enabled #appShell[data-galaxy-shell][data-galaxy-immersive="true"] ~ .app-mobile-nav {
  display: none !important;
}

[data-galaxy-shell][data-galaxy-immersive="true"] > .app-shell__body {
  display: block !important;
  min-height: 100dvh;
  height: 100dvh;
  overflow: hidden;
  background: transparent;
}

[data-galaxy-shell][data-galaxy-immersive="true"] > .app-shell__body > .app-main {
  width: 100%;
  min-width: 0;
  height: 100dvh;
  min-height: 0;
  overflow: auto;
  padding: 0 !important;
  background: transparent;
  scrollbar-gutter: auto;
}

[data-galaxy-shell][data-galaxy-immersive="true"] > .app-shell__body > .app-main > .app-workspace {
  width: 100%;
  min-width: 0;
  min-height: 100%;
  max-width: none;
  margin: 0;
  padding: 0;
}

[data-galaxy-shell][data-galaxy-immersive="true"] :is(.app-breadcrumb, .app-page-header, .app-context-bar) {
  display: none !important;
}

@media (max-width: 767px) {
  [data-galaxy-shell][data-galaxy-immersive="true"] > .app-shell__body > .app-main {
    height: 100dvh;
    overflow-x: hidden;
    overflow-y: auto;
  }
}

/* -------------------------------------------------------------------------
 * HH Core two-layer boundary
 *
 * The Galaxy Map is the public gateway surface. HH Platform is a separate
 * application surface that becomes available only after the HH Core runtime
 * sets data-hh-layer="platform". Keep the boundary visual as well as
 * semantic: the gateway owns its space scene; Platform owns its product
 * chrome and never inherits the gateway glow/effect layer.
 * ---------------------------------------------------------------------- */
[data-galaxy-shell][data-hh-layer="gateway"] {
  --hh-layer-canvas: #020611;
  --hh-layer-panel: rgb(4 10 27 / 96%);
  --hh-layer-line: rgb(145 116 255 / 24%);
  --hh-layer-accent: #b35cff;
  background: var(--hh-layer-canvas);
}

[data-galaxy-shell][data-hh-layer="platform"] {
  --hh-layer-canvas: #050914;
  --hh-layer-panel: rgb(6 13 25 / 97%);
  --hh-layer-raised: #0d1829;
  --hh-layer-line: rgb(86 207 224 / 18%);
  --hh-layer-accent: #56cfe0;
  --galaxy-bg: var(--hh-layer-canvas);
  --galaxy-bg-deep: #030711;
  --galaxy-surface: var(--hh-layer-panel);
  --galaxy-surface-raised: var(--hh-layer-raised);
  --galaxy-surface-hover: #13243a;
  --galaxy-glass: rgb(6 13 25 / 92%);
  --galaxy-border: var(--hh-layer-line);
  --galaxy-border-strong: rgb(86 207 224 / 46%);
  --galaxy-cyan: var(--hh-layer-accent);
  --galaxy-color-focus: #67e8f9;
  background:
    radial-gradient(circle at 82% 0%, rgb(86 207 224 / 7%), transparent 31%),
    linear-gradient(145deg, #050914, #07101d 58%, #030611);
}

/* The gateway scene already renders its own stars, nebula and map texture.
   Suppressing the shell effect prevents a second visual system bleeding
   through it. Platform retains only a restrained ambient field. */
[data-galaxy-shell][data-hh-layer="gateway"] > [data-galaxy-effect-owner="shell"] {
  display: none;
}

[data-galaxy-shell][data-hh-layer="gateway"] > .app-header,
[data-galaxy-shell][data-hh-layer="gateway"] > .app-shell__body > .app-sidebar,
[data-galaxy-shell][data-hh-layer="gateway"] > .app-shell__body > .app-sidebar-backdrop {
  display: none !important;
}

/* Fail closed while a direct deep-link is being resolved. This prevents a
   Platform header, sidebar or workspace from flashing for one frame before
   the gateway router restores /home. */
[data-galaxy-shell][data-hh-layer="gateway"]:not([data-galaxy-route="/home"]):not([data-galaxy-route^="/galaxy/"]) > .app-shell__body {
  visibility: hidden;
  pointer-events: none;
}

[data-galaxy-shell][data-hh-layer="platform"] > [data-galaxy-effect-owner="shell"] {
  opacity: 0.18;
}

[data-galaxy-shell][data-hh-layer="platform"] [data-galaxy-chrome="topbar"] {
  border-color: var(--hh-layer-line);
  background: rgb(5 10 20 / 96%);
  box-shadow: 0 10px 28px rgb(0 0 0 / 22%);
  backdrop-filter: blur(18px) saturate(112%);
}

[data-galaxy-shell][data-hh-layer="platform"] [data-galaxy-chrome="navigation"] {
  border-color: var(--hh-layer-line);
  background:
    linear-gradient(180deg, rgb(5 13 24 / 98%), rgb(3 8 17 / 98%));
  box-shadow: 12px 0 32px rgb(0 0 0 / 18%);
}

/* A deliberate, reversible exit is part of the Platform chrome. It is not
   rendered as a route link, so only the gateway controller can close access
   and return to the first layer. */
.app-core-exit {
  display: none;
  align-items: center;
  justify-content: center;
  gap: 7px;
  min-width: 44px;
  min-height: 44px;
  padding: 0 11px;
  border: 1px solid rgb(86 207 224 / 22%);
  border-radius: 10px;
  color: #b8cce0;
  background: rgb(9 20 35 / 78%);
  font: inherit;
  cursor: pointer;
  transition: border-color 160ms ease, color 160ms ease, background-color 160ms ease;
}

[data-galaxy-shell][data-hh-layer="platform"] .app-core-exit {
  display: inline-flex;
}

[data-galaxy-shell][data-hh-layer="platform"] > .app-core-exit {
  position: fixed;
  z-index: 90;
  right: max(14px, env(safe-area-inset-right));
  bottom: max(14px, env(safe-area-inset-bottom));
  box-shadow: 0 14px 36px rgb(0 0 0 / 34%), 0 0 24px rgb(86 207 224 / 10%);
  backdrop-filter: blur(16px) saturate(125%);
}

.app-core-exit > span {
  color: #67e8f9;
  font-size: 18px;
  line-height: 1;
}

.app-core-exit > b {
  font-size: 12px;
  font-weight: 750;
  white-space: nowrap;
}

.app-core-exit:hover {
  border-color: rgb(103 232 249 / 48%);
  color: #f4fbff;
  background: rgb(18 41 61 / 86%);
}

.app-core-exit:focus-visible {
  outline: 3px solid rgb(103 232 249 / 78%);
  outline-offset: 3px;
}

/* The old application dock contains direct Platform destinations. It must not
   appear in front of the HH Core boundary on compact screens. */
body.app-shell-enabled #appShell[data-hh-layer="gateway"] ~ .app-mobile-nav {
  display: none !important;
  pointer-events: none !important;
}

@media (max-width: 1399px) {
  [data-galaxy-shell][data-hh-layer="platform"] .app-core-exit > b {
    display: none;
  }
}

@media (max-width: 767px) {
  [data-galaxy-shell][data-hh-layer="platform"] .app-core-exit {
    width: 44px;
    padding: 0;
    border-radius: 11px;
  }

  [data-galaxy-shell][data-hh-layer="platform"] > .app-core-exit {
    right: max(10px, env(safe-area-inset-right));
    bottom: calc(84px + env(safe-area-inset-bottom));
  }
}

@media (prefers-reduced-motion: reduce) {
  .app-core-exit {
    transition: none;
  }
}

@media (forced-colors: active) {
  [data-galaxy-shell][data-hh-layer] {
    background: Canvas;
  }

  [data-galaxy-shell][data-hh-layer="platform"] > [data-galaxy-effect-owner="shell"] {
    display: none;
  }

  .app-core-exit {
    border: 1px solid ButtonText;
    color: ButtonText;
    background: ButtonFace;
    forced-color-adjust: auto;
  }
}

/* Platform is a complete second application layer. Older Galaxy releases
   used route-specific immersive selectors that hid the legacy header/sidebar
   for Chat, AI Center and the /galaxy/* aliases. Those selectors remain for
   rollback compatibility, but must never win once the Core gateway has
   granted platform access. Restore the normal two-column shell explicitly. */
[data-galaxy-shell][data-hh-layer="platform"] > .app-header {
  display: grid !important;
  min-height: var(--header-height, var(--header-h, 64px));
}

[data-galaxy-shell][data-hh-layer="platform"] > .app-shell__body {
  display: grid !important;
  grid-template-columns: var(--sidebar-width, var(--sidebar-w, 248px)) minmax(0, 1fr) !important;
  grid-template-rows: minmax(0, 1fr);
  height: calc(100dvh - var(--header-height, var(--header-h, 64px)));
  min-height: 0;
  overflow: visible;
}

[data-galaxy-shell][data-hh-layer="platform"] > .app-shell__body > .app-sidebar {
  display: flex !important;
}

[data-galaxy-shell][data-hh-layer="platform"] > .app-shell__body > .app-sidebar-backdrop {
  /* The backdrop is a mobile drawer layer, never a desktop grid item.  If it
     participates in the two-column grid it creates an implicit 0px/real row
     pair and pushes .app-main into the empty first row. */
  display: none !important;
}

[data-galaxy-shell][data-hh-layer="platform"] > .app-shell__body > .app-main {
  grid-column: 2;
  grid-row: 1;
  width: auto;
  height: 100%;
  min-width: 0;
  min-height: 0;
  overflow-x: hidden;
  overflow-y: auto;
  padding: initial;
}

/* On phones the Platform sidebar remains the existing off-canvas drawer;
   only the desktop grid restoration above is needed. */
@media (max-width: 767px) {
  [data-galaxy-shell][data-hh-layer="platform"] > .app-shell__body {
    grid-template-columns: minmax(0, 1fr) !important;
    grid-template-rows: minmax(0, 1fr);
    height: calc(100dvh - var(--header-height, var(--header-h, 56px)));
  }

  [data-galaxy-shell][data-hh-layer="platform"] > .app-shell__body > .app-sidebar {
    display: flex !important;
  }

  [data-galaxy-shell][data-hh-layer="platform"] > .app-shell__body > .app-sidebar-backdrop {
    /* Keep the existing off-canvas drawer behavior without adding a grid
       track.  Visibility/opacity/pointer-events remain controlled by the
       legacy sidebar state rules. */
    position: fixed;
    z-index: 51;
    inset: var(--header-height, 58px) 0 68px;
    display: block !important;
    border: 0;
  }

  [data-galaxy-shell][data-hh-layer="platform"] > .app-shell__body > .app-main {
    grid-column: 1;
    grid-row: 1;
    width: 100%;
    height: 100%;
  }
}