/* Side Chat tab: ONE side conversation per tab (Codex-style). Visual
 * language mirrors the main conversation pane: right-aligned user bubbles
 * on --dsw-specific-bubble, full-width assistant markdown, a capsule
 * composer card on --dsw-specific-input-major with a circular accent
 * send/stop button. Tool calls, thinking and context injections share one
 * collapsible-line chrome (no cards); shimmer is reserved for generating
 * states (running status line, streaming rows, the creating hero). Motion
 * is crossfade-only (≤200ms entrances, no springs); reduced-motion disables
 * every loop. All values consume DSW tokens (fallbacks point at older alias
 * tokens for rc-era hosts). */
.sidechat {
  flex: 1;
  min-height: 0;
  display: flex;
  flex-direction: column;
}

/* ── thread header (status dot · agent badge · threads menu · save) ─── */
.sidechatDetailHeader {
  flex: none;
  display: flex;
  align-items: center;
  gap: 4px;
  min-height: 36px;
  padding: 4px 8px 4px 12px;
  border-bottom: 1px solid var(--dsw-alias-hairline);
}

.sidechatHeaderDot {
  flex: none;
}

.sidechatHeaderSpacer {
  flex: 1;
  min-width: 0;
}

.sidechatAgentBadge {
  flex: none;
  max-width: 55%;
  padding: 1px 8px;
  border: 1px solid var(--dsw-alias-hairline);
  border-radius: 999px;
  font: var(--dsw-font-xxs-12);
  color: var(--dsw-alias-label-tertiary);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.sidechatIconBtn {
  flex: none;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 26px;
  height: 26px;
  padding: 0;
  border: none;
  border-radius: 6px;
  background: transparent;
  color: var(--dsw-alias-label-secondary);
  cursor: pointer;
  transition: background-color 100ms ease-out, color 100ms ease-out;
}

.sidechatIconBtn:hover:not(:disabled) {
  background: var(--dsw-alias-interactive-bg-hover);
  color: var(--dsw-alias-label-primary);
}

.sidechatIconBtn:disabled {
  opacity: 0.4;
  cursor: default;
}

/* ── hero (unbound tab: the one brand moment) ───────────────────────── */
.sidechatHero {
  flex: 1;
  min-height: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 24px 20px;
  color: var(--dsw-alias-label-tertiary);
  text-align: center;
  animation: sidechatFadeIn 200ms ease-out;
}

.sidechatHeroTitle {
  font: var(--dsw-font-s-14);
  font-weight: 500;
  color: var(--dsw-alias-label-primary);
}

.sidechatHeroDesc {
  max-width: 300px;
  font: var(--dsw-font-xxs-12);
  color: var(--dsw-alias-label-tertiary);
  line-height: 1.6;
}

.sidechatPrimaryBtn {
  flex: none;
  margin-top: 4px;
  padding: 6px 14px;
  border: none;
  border-radius: 999px;
  background: var(--dsw-alias-button-info-fill, var(--dsw-alias-accent));
  color: var(--dsw-alias-button-info-label, var(--dsw-alias-accent-ink, #fff));
  font: var(--dsw-font-s-13);
  cursor: pointer;
  transition: opacity 100ms ease-out;
}

.sidechatPrimaryBtn:hover:not(:disabled) {
  opacity: 0.88;
}

.sidechatPrimaryBtn:disabled {
  opacity: 0.4;
  cursor: default;
}

.sidechatHint {
  flex: none;
  padding: 4px 12px;
  font: var(--dsw-font-xxs-12);
  color: var(--dsw-alias-label-tertiary);
}

.sidechatError {
  flex: none;
  padding: 4px 12px;
  font: var(--dsw-font-xxs-12);
  color: var(--dsw-alias-danger);
}

/* ── transcript ─────────────────────────────────────────────────────── */
.sidechatScroll {
  flex: 1;
  min-height: 0;
  overflow-y: auto;
  padding: 10px 12px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

/* Rows crossfade in on append (keys are stable, so only NEW rows play). */
.sidechatScroll > * {
  animation: sidechatRowIn 180ms ease-out;
}

/* User message: right-aligned bubble, same surface as the main pane. */
.sidechatUser {
  align-self: flex-end;
  max-width: 88%;
  padding: 8px 14px;
  border-radius: 18px;
  background: var(--dsw-specific-bubble, var(--dsw-alias-bg-base));
  font: var(--dsw-font-s-14);
  color: var(--dsw-alias-label-primary);
  overflow-wrap: anywhere;
}

/* Assistant message: full-width narration, no bubble — the main pane way. */
.sidechatAssistant {
  align-self: stretch;
  font: var(--dsw-font-s-14);
  color: var(--dsw-alias-label-primary);
  overflow-wrap: anywhere;
}

/* ── collapsible context rows (tool / thinking / injection, Codex-style) ──
 * One quiet line — chevron + label + one-line summary — that expands into
 * an indented body hung on a hairline thread. No cards, no fills: hierarchy
 * rides ink weight alone. Streaming rows shimmer the label (shimmer =
 * generating); failed rows go danger; reduced-motion stills every loop. */
.sidechatRow {
  align-self: stretch;
}

.sidechatRowLine {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 1px 0;
  font: var(--dsw-font-xxs-12);
  color: var(--dsw-alias-label-tertiary);
}

.sidechatRowSummary {
  cursor: pointer;
  list-style: none;
  user-select: none;
}

.sidechatRowSummary::-webkit-details-marker {
  display: none;
}

.sidechatRowSummary:hover {
  color: var(--dsw-alias-label-secondary);
}

.sidechatRowStatic {
  cursor: default;
}

.sidechatRowChevron {
  flex: none;
  display: inline-flex;
  align-items: center;
  transition: transform 100ms ease-out;
}

.sidechatRow[open] .sidechatRowChevron {
  transform: rotate(90deg);
}

/* Tool-kind leading glyph (the main conversation's 16px slot; the icon
 * itself renders at 14). Failed rows pass a StateDot instead. */
.sidechatRowIcon {
  flex: none;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 16px;
  height: 16px;
  color: var(--dsw-alias-label-tertiary);
}

.sidechatRowLabel {
  flex: none;
  max-width: 60%;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  color: var(--dsw-alias-label-secondary);
}

.sidechatRowMono {
  font-family: var(--dsw-font-mono);
}

.sidechatRowMeta {
  flex: 1;
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  font-family: var(--dsw-font-mono);
  color: var(--dsw-alias-label-tertiary);
}

.sidechatRowFailed .sidechatRowLabel,
.sidechatRowFailed .sidechatRowMeta {
  color: var(--dsw-alias-danger);
}

.sidechatRowBody {
  margin: 2px 0 4px 7px;
  padding: 2px 0 2px 10px;
  border-left: 1px solid var(--dsw-alias-hairline);
}

.sidechatRowProse {
  font: var(--dsw-font-xxs-12);
  color: var(--dsw-alias-label-tertiary);
  white-space: pre-wrap;
  overflow-wrap: anywhere;
  max-height: 240px;
  overflow-y: auto;
}

.sidechatRowCode {
  margin: 0;
  padding: 4px 0;
  font: var(--dsw-font-xxs-12);
  font-family: var(--dsw-font-mono);
  color: var(--dsw-alias-label-secondary);
  white-space: pre-wrap;
  overflow-wrap: anywhere;
  max-height: 220px;
  overflow-y: auto;
}

.sidechatRowCode + .sidechatRowCode {
  border-top: 1px solid var(--dsw-alias-hairline);
}

/* Host Block atoms (terminal/diff/read) inside a row body draw their own
 * chrome; only a hair of breathing room is added on top. */
.sidechatRowBody > * {
  margin-top: 2px;
}

/* Turn-tail metrics line: quiet, right-aligned, ink-weight only. */
.sidechatTurnSummary {
  align-self: flex-end;
  max-width: 88%;
  padding: 0 2px;
  font: var(--dsw-font-xxs-12);
  font-variant-numeric: tabular-nums;
  color: var(--dsw-alias-label-tertiary);
  user-select: none;
}

/* Shimmer sweep text: generating (streaming row labels, creating hero). */
.sidechatShimmerText {
  background-image: linear-gradient(
    90deg,
    var(--dsw-alias-label-tertiary) 0%,
    var(--dsw-alias-label-primary) 50%,
    var(--dsw-alias-label-tertiary) 100%
  );
  background-size: 200% 100%;
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  animation: sidechatSweep 2.6s linear infinite;
}

/* ── running status line (above the composer, main-pane style) ──────── */
.sidechatStatus {
  flex: none;
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 2px 14px 6px;
  animation: sidechatFadeIn 160ms ease-out;
}

.sidechatStatusText {
  font: var(--dsw-font-xxs-12);
  background-image: linear-gradient(
    90deg,
    var(--dsw-alias-label-tertiary) 0%,
    var(--dsw-alias-label-primary) 50%,
    var(--dsw-alias-label-tertiary) 100%
  );
  background-size: 200% 100%;
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  animation: sidechatSweep 2.6s linear infinite;
}

/* ── composer (capsule card, InputBar-aligned) ──────────────────────── */
.sidechatComposer {
  flex: none;
  display: flex;
  flex-direction: column;
  gap: 4px;
  margin: 0 8px 8px;
  padding: 8px 8px 6px 14px;
  border: 1px solid var(--dsw-alias-border-l2-darkmode-thin, var(--dsw-alias-hairline));
  border-radius: 16px;
  background: var(--dsw-specific-input-major, var(--dsw-alias-bg-base));
  box-shadow: var(--dsw-shadow-lv2, none);
}

.sidechatComposerInput {
  width: 100%;
  box-sizing: border-box;
  padding: 2px 0;
  border: none;
  background: transparent;
  color: var(--dsw-alias-label-primary);
  font: var(--dsw-font-s-14);
  line-height: 22px;
  outline: none;
  resize: none;
  max-height: 132px;
}

.sidechatComposerInput::placeholder {
  color: var(--dsw-alias-label-tertiary);
}

.sidechatComposerBar {
  flex: none;
  display: flex;
  align-items: center;
  gap: 8px;
  min-height: 28px;
}

.sidechatComposerMeta {
  flex: 1;
  min-width: 0;
  font: var(--dsw-font-xxs-12);
  color: var(--dsw-alias-label-tertiary);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.sidechatSendBtn {
  flex: none;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  padding: 0;
  border: none;
  border-radius: 50%;
  background: var(--dsw-alias-button-info-fill, var(--dsw-alias-accent));
  color: var(--dsw-alias-button-info-label, var(--dsw-alias-accent-ink, #fff));
  cursor: pointer;
  /* send ⇄ stop swap: keyed remount plays this, hover only fades. */
  animation: sidechatBtnIn 120ms ease-out;
  transition: opacity 100ms ease-out;
}

.sidechatSendBtn:hover:not(:disabled) {
  opacity: 0.88;
}

.sidechatSendBtn:disabled {
  opacity: 0.35;
  cursor: default;
}

/* ── motion vocabulary (crossfade only, ≤200ms; loops reduced-motion off) */
@keyframes sidechatRowIn {
  from { opacity: 0; transform: translateY(4px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes sidechatFadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

@keyframes sidechatBtnIn {
  from { opacity: 0; transform: scale(0.85); }
  to { opacity: 1; transform: scale(1); }
}

@keyframes sidechatSweep {
  from { background-position: 200% 0; }
  to { background-position: -200% 0; }
}

@media (prefers-reduced-motion: reduce) {
  .sidechatScroll > *,
  .sidechatHero,
  .sidechatStatus,
  .sidechatSendBtn {
    animation: none;
  }
  .sidechatStatusText,
  .sidechatShimmerText {
    animation: none;
    background-image: none;
    color: var(--dsw-alias-label-tertiary);
  }
  .sidechatRowChevron {
    transition: none;
  }
}