/* 应用框架 + 会话侧栏（抽屉/常驻侧栏、会话列表、文件夹）。 */
/* ===== 应用框架与会话侧栏 ===== */
.app-shell {
  position: relative;
  isolation: isolate;
  display: flex;
  flex: 1;
  min-width: 0;
  min-height: 0;
  overflow: hidden;
}
.chat-shell {
  display: flex;
  flex: 1;
  flex-direction: column;
  min-width: 0;
  min-height: 0;
}
.app-status {
  position: fixed;
  z-index: 40;
  top: calc(12px + env(safe-area-inset-top));
  left: 50%;
  width: min(calc(100vw - 32px), 520px);
  padding: 10px 14px;
  color: #7c2d12;
  background: rgba(255,255,255,.96);
  border: .5px solid rgba(154,52,18,.22);
  border-radius: 12px;
  box-shadow: 0 12px 32px rgba(31,30,29,.12);
  font-size: 13px;
  line-height: 1.45;
  text-align: center;
  visibility: hidden;
  pointer-events: none;
  opacity: 0;
  transform: translate(-50%, -8px);
  transition:
    opacity var(--motion-fast) ease,
    transform var(--motion-fast) var(--ease-out),
    visibility 0s linear var(--motion-fast);
}
.app-status.is-visible {
  visibility: visible;
  opacity: 1;
  transform: translate(-50%, 0);
  transition-delay: 0s;
}
.conversation-sidebar {
  position: fixed;
  inset: 0 auto 0 0;
  z-index: 12;
  width: min(86vw, 320px);
  overflow: hidden;
  color: var(--text-primary);
  background: var(--bg-primary);
  border-right: .5px solid rgba(31,30,29,.13);
  box-shadow: 16px 0 44px rgba(31,30,29,.1);
  visibility: hidden;
  pointer-events: none;
  transform: translate3d(-100%, 0, 0);
  -webkit-backface-visibility: hidden;
  backface-visibility: hidden;
  will-change: transform;
  transition:
    transform var(--motion-panel) var(--ease-drawer),
    visibility 0s linear var(--motion-panel);
}
.app-shell.sidebar-is-open .conversation-sidebar {
  visibility: visible;
  pointer-events: auto;
  transform: translate3d(0, 0, 0);
  transition-delay: 0s;
}
.conversation-sidebar-inner {
  display: flex;
  flex-direction: column;
  width: 100%;
  height: 100%;
  min-height: 0;
  padding:
    calc(8px + env(safe-area-inset-top))
    10px
    calc(10px + env(safe-area-inset-bottom));
}
.conversation-sidebar-header {
  display: grid;
  grid-template-columns: 1fr auto auto auto;
  align-items: center;
  gap: 2px;
  min-height: 48px;
  padding-left: 8px;
}
.conversation-sidebar-header h2 {
  margin: 0;
  font-family: var(--font-display);
  font-size: 21px;
  font-weight: 500;
  line-height: 1.2;
  letter-spacing: .1px;
}
.conversation-sidebar-action,
.conversation-more,
.conversation-menu-button,
.conversation-rename-action {
  display: grid;
  place-items: center;
  min-width: 44px;
  min-height: 44px;
  padding: 0;
  color: var(--text-secondary);
  background: transparent;
  border: none;
  border-radius: 12px;
  cursor: pointer;
  transition:
    color var(--motion-fast) ease,
    background-color var(--motion-fast) ease,
    transform var(--motion-fast) var(--ease-out);
}
.conversation-sidebar-action svg,
.conversation-more svg,
.conversation-menu-button svg,
.conversation-rename-action svg {
  width: 19px;
  height: 19px;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.65;
  stroke-linecap: round;
  stroke-linejoin: round;
}
.conversation-sidebar-action:disabled,
.conversation-more:disabled,
.conversation-menu-button:disabled,
.conversation-rename-action:disabled {
  opacity: .35;
  cursor: default;
}
.conversation-pending-note {
  min-height: 0;
  margin: 0 8px;
  overflow: hidden;
  color: var(--text-muted);
  font-size: 12px;
  line-height: 1.4;
}
.conversation-pending-note:not(:empty) {
  min-height: 30px;
  padding: 5px 0 8px;
}
.conversation-list {
  flex: 1;
  min-height: 0;
  overflow-y: auto;
  overscroll-behavior: contain;
  padding: 3px 0 16px;
  scrollbar-width: thin;
  -webkit-overflow-scrolling: touch;
}
.conversation-item {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr) 44px;
  align-items: center;
  min-height: 60px;
  margin: 2px 0;
  border-radius: 14px;
}
.conversation-pin {
  display: inline-grid;
  flex: none;
  place-items: center;
  color: var(--accent);
}
.conversation-pin svg { width: 12px; height: 12px; fill: none; stroke: currentColor; stroke-width: 2; stroke-linecap: round; stroke-linejoin: round; }