/*
 * App Shell: единая геометрия и глобальные UI-слои приложения.
 * Feature-specific стили находятся в styles/features/* и network-graph.css.
 */
.app-shell {
  width: min(var(--app-viewport-width, 100vw), 430px);
  height: var(--app-viewport-height, 100vh);
  position: fixed;
  top: var(--app-viewport-offset-top, 0px);
  left: calc(50% + var(--app-viewport-offset-left, 0px) / 2);
  transform: translateX(-50%);
  --call-minimized-bar-height: 0px;
  --topbar-height: 0px;
  --composer-height: 0px;
  --toolbar-height: 78px;
  --keyboard-offset: 0px;
  --z-shell-content: 1;
  --z-shell-fade: 10;
  --z-shell-chrome: 20;
  --z-shell-status: 30;
  background: transparent;
  border-left: 1px solid transparent;
  border-right: 1px solid transparent;
  box-shadow: var(--shadow);
  overflow: hidden;
}

.screen-content {
  position: absolute;
  top: calc(var(--call-minimized-bar-height, 0px) + var(--topbar-height, 0px));
  left: 0;
  right: 0;
  bottom: calc(var(--toolbar-height, 78px) + var(--composer-height, 0px));
  z-index: var(--z-shell-content);
  overflow-y: auto;
  padding: 14px 14px 24px;
}

.screen-content.no-app-chrome {
  top: var(--call-minimized-bar-height, 0px);
  bottom: 0;
  padding-bottom: calc(24px + env(safe-area-inset-bottom));
}

.app-shell.has-minimized-call .screen-content {
  padding-top: 12px;
}

.topbar-slot,
.composer-slot,
.toolbar-slot {
  z-index: var(--z-shell-chrome);
}

.topbar-slot[hidden],
.composer-slot[hidden],
.toolbar-slot[hidden] {
  display: none;
}

.topbar-slot {
  position: absolute;
  top: var(--call-minimized-bar-height, 0px);
  left: 0;
  right: 0;
  padding: 0 12px;
  pointer-events: none;
}

.topbar-slot > * {
  pointer-events: auto;
}

.composer-slot {
  position: absolute;
  left: 50%;
  width: min(var(--app-viewport-width, 100vw), 430px);
  transform: translateX(-50%);
  bottom: calc(var(--toolbar-height, 78px) + env(safe-area-inset-bottom));
  padding: 0 12px;
  pointer-events: none;
}

.composer-slot > * {
  pointer-events: auto;
}

.toolbar-slot {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  padding: 2px 10px calc(4px + env(safe-area-inset-bottom));
  background: linear-gradient(180deg, rgba(7, 12, 23, 0) 0%, rgba(6, 11, 22, 0.96) 44%);
  transition: opacity 0.18s ease, transform 0.18s ease;
}

.connection-retry-banner {
  position: absolute;
  left: 12px;
  right: 12px;
  bottom: calc(96px + env(safe-area-inset-bottom));
  z-index: var(--z-shell-status);
  border-radius: 11px;
  border: 1px solid rgba(133, 156, 201, 0.3);
  background: rgba(10, 19, 37, 0.86);
  color: #c6d6f7;
  font-size: 12px;
  line-height: 1.2;
  text-align: center;
  padding: 7px 10px;
  pointer-events: auto;
  cursor: pointer;
  backdrop-filter: blur(10px);
}

.connection-retry-banner.is-connected {
  border-color: rgba(124, 235, 171, 0.4);
  color: #d8ffe9;
}

.connection-retry-banner.is-connecting {
  border-color: transparent;
  color: #ffe8bb;
}

.connection-retry-banner.is-disconnected {
  border-color: rgba(228, 127, 145, 0.44);
  color: #ffdce3;
}

.connection-retry-banner.is-updating {
  border-color: rgba(144, 201, 255, 0.44);
  color: #d9eeff;
}

/* Обычный scroll-container физически продолжается под прозрачным TopBar. */
.app-shell--content-under-topbar:not(.app-shell--scroll-nested):not(.app-shell--scroll-locked) .screen-content:not(.no-app-chrome) {
  top: var(--call-minimized-bar-height, 0px);
  padding-top: calc(var(--topbar-height, 64px) + 14px);
}

/* Вложенный scroll-container (например, переписка) сам резервирует место под chrome. */
.app-shell--scroll-nested .topbar-slot {
  position: fixed;
  top: var(--call-minimized-bar-height, 0px);
  left: 0;
  right: 0;
  width: min(100vw, 430px);
  margin: 0 auto;
  transform: none;
  padding: 0 12px;
}

.app-shell--scroll-nested .screen-content {
  top: var(--call-minimized-bar-height, 0px);
  padding-top: 0;
}

.app-shell--content-under-bottom:not(.keyboard-open) .screen-content {
  bottom: calc(var(--toolbar-height, 78px) + env(safe-area-inset-bottom));
}

/* Полноэкранный feature сам управляет внутренней геометрией, shell — viewport/слоями. */
.app-shell--scroll-locked .screen-content {
  top: var(--call-minimized-bar-height, 0px);
  left: 0;
  right: 0;
  bottom: 0;
  overflow: hidden;
  padding: 0;
}

.app-shell--scrollbar-hidden .screen-content {
  scrollbar-width: none;
  -ms-overflow-style: none;
}

.app-shell--scrollbar-hidden .screen-content::-webkit-scrollbar {
  width: 0;
  height: 0;
  display: none;
}

/* Global shell fades: один механизм, режимы различаются только профилем кривой. */
.app-shell-fade {
  position: absolute;
  left: 0;
  right: 0;
  z-index: var(--z-shell-fade);
  display: none;
  pointer-events: none;
}

.app-shell--top-fade.app-shell--has-topbar .app-shell-fade--top {
  display: block;
  top: var(--call-minimized-bar-height, 0px);
  height: calc(var(--topbar-height, 64px) + 48px);
  background: linear-gradient(
    to bottom,
    rgba(5, 7, 10, 1) 0%,
    rgba(5, 7, 10, 0.98) 16%,
    rgba(5, 7, 10, 0.88) 32%,
    rgba(5, 7, 10, 0.66) 52%,
    rgba(5, 7, 10, 0.38) 70%,
    rgba(5, 7, 10, 0.15) 84%,
    rgba(5, 7, 10, 0) 100%
  );
}

.app-shell--bottom-fade.app-shell--bottom-fade-composer.app-shell--has-composer .app-shell-fade--bottom {
  display: block;
  bottom: calc(var(--toolbar-height, 78px) + env(safe-area-inset-bottom));
  height: calc(var(--composer-height, 0px) + 52px);
  background: linear-gradient(
    to bottom,
    rgba(5, 7, 10, 0) 0%,
    rgba(5, 7, 10, 0.14) 18%,
    rgba(5, 7, 10, 0.38) 38%,
    rgba(5, 7, 10, 0.66) 58%,
    rgba(5, 7, 10, 0.88) 76%,
    rgba(5, 7, 10, 0.98) 90%,
    rgba(5, 7, 10, 1) 100%
  );
}

/* Иммерсивный edge-профиль использует тот же fade-layer, но прежнюю кривую графа. */
.app-shell--fade-edge.app-shell--top-fade.app-shell--has-topbar .app-shell-fade--top {
  height: var(--topbar-height, 64px);
  background: linear-gradient(
    to bottom,
    rgba(5, 7, 10, 1) 0%,
    rgba(5, 7, 10, 1) 32%,
    rgba(5, 7, 10, 0.94) 38%,
    rgba(5, 7, 10, 0.72) 46%,
    rgba(5, 7, 10, 0.46) 54%,
    rgba(5, 7, 10, 0.22) 61%,
    rgba(5, 7, 10, 0.08) 65%,
    rgba(5, 7, 10, 0) 68%,
    rgba(5, 7, 10, 0) 100%
  );
}

.app-shell--fade-edge.app-shell--bottom-fade.app-shell--bottom-fade-toolbar .app-shell-fade--bottom {
  display: block;
  bottom: 0;
  height: var(--toolbar-height, 78px);
  background: linear-gradient(
    to bottom,
    rgba(5, 7, 10, 0) 0%,
    rgba(5, 7, 10, 0) 32%,
    rgba(5, 7, 10, 0.08) 35%,
    rgba(5, 7, 10, 0.22) 39%,
    rgba(5, 7, 10, 0.46) 46%,
    rgba(5, 7, 10, 0.72) 54%,
    rgba(5, 7, 10, 0.94) 62%,
    rgba(5, 7, 10, 1) 68%,
    rgba(5, 7, 10, 1) 100%
  );
}

/* При toolbar-anchored fade сам toolbar остаётся прозрачным над общим shell-layer. */
.app-shell--bottom-fade-toolbar .toolbar-slot {
  isolation: isolate;
  overflow: visible;
  background: transparent;
  border: 0;
  box-shadow: none;
}

.app-shell--bottom-fade-toolbar .toolbar-slot > .toolbar {
  position: relative;
  z-index: 1;
  background: transparent;
  border: 0;
  border-color: transparent;
  box-shadow: none;
  backdrop-filter: none;
  -webkit-backdrop-filter: none;
}

/* Keyboard lifecycle остаётся частью App Shell, а не страницы чата. */
.app-shell.keyboard-open .toolbar-slot {
  bottom: 0;
}

.app-shell--scroll-nested.keyboard-open .composer-slot {
  bottom: var(--keyboard-offset, 0px);
  padding-bottom: 0;
}


.app-shell--scroll-nested.keyboard-open .screen-content {
  bottom: var(--keyboard-offset, 0px);
}

@media (min-width: 900px) {
  .app-shell {
    top: 16px;
    height: calc(100svh - 32px);
    border-radius: 24px;
  }
}