/* ═══════════════════════════════════════════════════════════════
   LOCAL CHAT — Phase 5e
   Chat interface layout, message bubbles, input bar, responsive
   ═══════════════════════════════════════════════════════════════ */

/* ═══════════════════════════════════════════════════════════════
   COLOUR DECLARATIONS
   ═══════════════════════════════════════════════════════════════ */

/* ── Common: inherited background & colour ───────────────────── */

.local-chat-model-bar select,
.local-chat-system-prompt textarea,
.local-chat-retry,
.local-chat-scroll-bottom,
.local-chat-input-bar textarea,
.local-chat-restore-banner-btn,
.local-chat-chip,
.local-chat-edit-textarea,
.local-chat-edit-buttons button,
.local-chat-preset-bar select {
  background: inherit;
  color: inherit;
}

/* ── Common: 1px solid currentcolor borders ──────────────────── */

.local-chat-model-bar select,
.local-chat-system-prompt textarea,
#local-chat-messages,
.local-chat-retry,
.local-chat-scroll-bottom,
.local-chat-input-bar textarea,
.local-chat-restore-banner,
.local-chat-restore-banner-btn,
.local-chat-history-panel,
.local-chat-edit-textarea,
.local-chat-edit-buttons button,
.local-chat-preset-bar select {
  border: 1px solid currentcolor;
}

/* ── Common: currentcolor bottom borders ─────────────────────── */

.local-chat-benchmark-table th,
.local-chat-benchmark-table td,
.local-chat-history-heading,
.local-chat-history-entry {
  border-bottom: 1px solid currentcolor;
}

/* ── Blockquote accent ───────────────────────────────────────── */

.local-chat-bubble-assistant blockquote {
  border-left: 3px solid currentcolor;
}

/* ── Typing indicator dots ───────────────────────────────────── */

.local-chat-typing-dot {
  background: currentcolor;
}

/* ── Focus ring ──────────────────────────────────────────────── */

#local-chat-messages:focus-visible {
  outline: 3px solid currentcolor;
}

/* ── Export menu ──────────────────────────────────────────────── */

.local-chat-export-menu button {
  background: transparent;
  color: inherit;
  border: none;
}

/* ═══════════════════════════════════════════════════════════════
   STRUCTURAL DECLARATIONS
   ═══════════════════════════════════════════════════════════════ */

/* ── Model selector bar ──────────────────────────────────────── */

.local-chat-model-bar {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 1rem;
  flex-wrap: wrap;
}

.local-chat-model-bar label {
  font-weight: bold;
}

.local-chat-model-bar select {
  min-width: 10rem;
  padding: 0.35rem 0.5rem;
  border-radius: 0.25rem;
  font-size: inherit;
}

#local-chat-model-status {
  font-size: 0.9em;
}

/* ── System prompt (collapsible) ─────────────────────────────── */

.local-chat-system-prompt {
  margin-bottom: 1rem;
}

.local-chat-system-prompt summary {
  cursor: pointer;
  font-weight: bold;
}

.local-chat-system-prompt textarea {
  width: 100%;
  box-sizing: border-box;
  margin-top: 0.5rem;
  padding: 0.5rem;
  border-radius: 0.25rem;
  font-family: inherit;
  font-size: inherit;
  resize: vertical;
}

/* ── Parameters panel (5d) ────────────────────────────────────── */

.local-chat-parameters {
  margin-bottom: 0.75rem;
  padding: 0 0.75rem;
}

.local-chat-parameters[open] {
  padding-bottom: 0.75rem;
}

.local-chat-parameters summary {
  padding: 0.5rem 0;
  cursor: pointer;
  font-weight: bold;
}

.local-chat-param-group {
  margin-top: 0.75rem;
}

.local-chat-param-group label {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  font-size: 0.9em;
  margin-bottom: 0.25rem;
}

.local-chat-param-group output {
  font-weight: bold;
  font-variant-numeric: tabular-nums;
}

.local-chat-param-group input[type="range"] {
  width: 100%;
  margin: 0;
  cursor: pointer;
}

.local-chat-param-desc {
  display: block;
  font-size: 0.8em;
  margin-top: 0.15rem;
}

/* ── Input token counter (5d) ─────────────────────────────────── */

.local-chat-input-counter {
  font-size: 0.8em;
  padding: 0.15rem 0.5rem;
}

.local-chat-input-counter-warning {
  font-weight: bold;
}

/* ── Message list ────────────────────────────────────────────── */

#local-chat-messages {
  overflow-y: auto;
  max-height: 60vh;
  padding: 0.75rem;
  margin-bottom: 0.75rem;
  border-radius: 0.5rem;
  scroll-behavior: smooth;
}

/* ── Message bubbles ─────────────────────────────────────────── */

.local-chat-bubble {
  max-width: 80%;
  padding: 0.75rem 1rem;
  margin-bottom: 0.75rem;
  border-radius: 1rem;
  line-height: 1.5;
  word-wrap: break-word;
  overflow-wrap: break-word;
}

.local-chat-bubble:last-child {
  margin-bottom: 0;
}

/* User bubble — right-aligned */
.local-chat-bubble-user {
  margin-left: auto;
  border-bottom-right-radius: 0.25rem;
  white-space: pre-wrap;
}

/* Assistant bubble — left-aligned */
.local-chat-bubble-assistant {
  margin-right: auto;
  border-bottom-left-radius: 0.25rem;
}

/* ── Markdown inside assistant bubbles ───────────────────────── */

.local-chat-bubble-assistant p {
  margin: 0 0 0.5em 0;
}

.local-chat-bubble-assistant p:last-child {
  margin-bottom: 0;
}

.local-chat-bubble-assistant ul,
.local-chat-bubble-assistant ol {
  margin: 0.25em 0 0.5em 1.5em;
  padding: 0;
}

.local-chat-bubble-assistant pre {
  overflow-x: auto;
  padding: 0.5rem;
  border-radius: 0.25rem;
  font-size: 0.9em;
  margin: 0.5em 0;
}

.local-chat-bubble-assistant code {
  font-size: 0.9em;
}

.local-chat-bubble-assistant h1,
.local-chat-bubble-assistant h2,
.local-chat-bubble-assistant h3,
.local-chat-bubble-assistant h4 {
  margin: 0.75em 0 0.25em 0;
  font-size: 1.1em;
}

.local-chat-bubble-assistant h1:first-child,
.local-chat-bubble-assistant h2:first-child,
.local-chat-bubble-assistant h3:first-child {
  margin-top: 0;
}

.local-chat-bubble-assistant blockquote {
  margin: 0.5em 0;
  padding-left: 0.75em;
}

/* ── Code block copy button ─────────────────────────────────── */

.local-chat-code-wrapper {
  position: relative;
}

.local-chat-code-copy {
  position: absolute;
  top: 0.25rem;
  right: 0.25rem;
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
  padding: 0.2rem 0.5rem;
  font-size: 0.75em;
  cursor: pointer;
  min-height: 44px;
  min-width: 44px;
}

/* ── Error in bubble ─────────────────────────────────────────── */

.local-chat-bubble-error {
  display: block;
  font-style: italic;
  font-weight: bold;
}

/* ── Retry button (5e) ────────────────────────────────────────── */

.local-chat-retry {
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
  margin-top: 0.5rem;
  padding: 0.25rem 0.5rem;
  border-radius: 0.25rem;
  font-size: 0.8em;
  cursor: pointer;
  min-height: 44px;
  min-width: 44px;
}

.local-chat-retry:hover,
.local-chat-retry:focus-visible {
  opacity: 1;
}

.local-chat-retry:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}

/* ── Typing indicator ──────────────────────────────────────── */

.local-chat-typing {
  display: flex;
  align-items: center;
  gap: 0.3rem;
  padding: 0.25rem 0;
  min-height: 1.5em;
}

.local-chat-typing-dot {
  width: 0.5rem;
  height: 0.5rem;
  border-radius: 50%;
  opacity: 0.4;
  animation: local-chat-dot-pulse 1.4s ease-in-out infinite;
}

.local-chat-typing-dot:nth-child(2) {
  animation-delay: 0.2s;
}

.local-chat-typing-dot:nth-child(3) {
  animation-delay: 0.4s;
}

@keyframes local-chat-dot-pulse {
  0%,
  80%,
  100% {
    opacity: 0.4;
    transform: scale(1);
  }
  40% {
    opacity: 1;
    transform: scale(1.2);
  }
}

/* ── Bubble entrance animation ─────────────────────────────── */

@media (prefers-reduced-motion: no-preference) {
  .local-chat-bubble {
    animation: local-chat-bubble-in 0.2s ease-out;
  }

  @keyframes local-chat-bubble-in {
    from {
      opacity: 0;
      transform: translateY(0.5rem);
    }
    to {
      opacity: 1;
      transform: translateY(0);
    }
  }
}

/* ── Bubble action buttons (Copy / Regenerate) ──────────────── */

.local-chat-bubble-actions {
  display: flex;
  gap: 0.5rem;
  margin-top: 0.5rem;
}

.local-chat-copy,
.local-chat-copy-formatted,
.local-chat-regenerate,
.local-chat-read-aloud {
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
  padding: 0.25rem 0.5rem;
  font-size: 0.8em;
  min-height: 44px;
  min-width: 44px;
}

.local-chat-copy:hover,
.local-chat-copy:focus-visible,
.local-chat-copy-formatted:hover,
.local-chat-copy-formatted:focus-visible,
.local-chat-regenerate:hover,
.local-chat-regenerate:focus-visible,
.local-chat-read-aloud:hover,
.local-chat-read-aloud:focus-visible {
  opacity: 1;
}

/* ── Voice Settings link ───────────────────────────────────── */

.local-chat-voice-settings {
  display: block;
  font-size: 0.8em;
  margin-top: 0.5rem;
}

.local-chat-voice-settings [data-icon] {
  vertical-align: middle;
}

/* ── No WebGPU message ──────────────────────────────────────── */

.local-chat-no-webgpu {
  font-style: italic;
  padding: 1rem;
  text-align: center;
}

/* ── Focus indicators ───────────────────────────────────────── */

#local-chat-messages:focus-visible {
  outline-offset: -3px;
}

/* ── Scroll-to-bottom button ────────────────────────────────── */

.local-chat-scroll-bottom {
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  float: right;
  margin-top: -3rem;
  margin-right: 1rem;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  font-size: 1.2em;
  cursor: pointer;
  z-index: 1;
}

.local-chat-scroll-bottom:hover {
  opacity: 1;
}

.local-chat-scroll-bottom[hidden] {
  display: none;
}

/* ── Input bar ───────────────────────────────────────────────── */

.local-chat-input-bar {
  display: flex;
  gap: 0.5rem;
  align-items: flex-end;
  margin-bottom: 0.5rem;
}

.local-chat-input-bar textarea {
  flex: 1;
  padding: 0.5rem;
  border-radius: 0.25rem;
  font-family: inherit;
  font-size: inherit;
  resize: none;
  overflow-y: auto;
  min-height: 2.75rem;
}

.local-chat-input-bar button {
  min-height: 44px;
  min-width: 44px;
  padding: 0.5rem 1rem;
  font-size: inherit;
  white-space: nowrap;
}

.local-chat-input-bar button:disabled {
  cursor: not-allowed;
}

/* ── Stats bar ───────────────────────────────────────────────── */

.local-chat-stats {
  display: block;
  width: 100%;
  font-size: 0.85em;
  min-height: 1.25em;
  margin-bottom: 0.75rem;
}

/* ── Context gauge ───────────────────────────────────────────── */

.local-chat-context-warning {
  font-weight: bold;
}

/* ── Message count badge ────────────────────────────────────── */

.local-chat-message-count {
  font-size: 0.85em;
}

/* ── Welcome card ───────────────────────────────────────────── */

.local-chat-welcome {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  padding: 2rem 1rem;
}

.local-chat-welcome-heading {
  font-size: 1.3em;
  margin: 0 0 0.25rem 0;
}

.local-chat-welcome-meta {
  font-size: 0.9em;
  margin: 0 0 1rem 0;
}

.local-chat-welcome-intro {
  font-size: 0.95em;
  margin: 0 0 1rem 0;
  max-width: 30rem;
}

/* ── Welcome card benchmark table ───────────────────────────── */

.local-chat-benchmark-table {
  border-collapse: collapse;
  font-size: 0.85em;
  margin: 0 auto 1rem auto;
  text-align: left;
}

.local-chat-benchmark-table th,
.local-chat-benchmark-table td {
  padding: 0.3rem 0.75rem;
}

.local-chat-benchmark-table th {
  opacity: 1;
  font-weight: bold;
}

/* ── Starter prompt chips ───────────────────────────────────── */

.local-chat-chip-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  justify-content: center;
}

.local-chat-chip {
  padding: 0.5rem 1rem;
  border-radius: 1.5rem;
  font-size: 0.9em;
  cursor: pointer;
  min-height: 44px;
}

.local-chat-chip:hover,
.local-chat-chip:focus-visible {
  opacity: 1;
}

/* ── Model info panel ───────────────────────────────────────── */

.local-chat-model-info {
  margin-bottom: 1rem;
  font-size: 0.9em;
}

.local-chat-model-info summary {
  cursor: pointer;
}

.local-chat-model-info summary:hover {
  opacity: 1;
}

.local-chat-model-info-summary {
  margin: 0.5rem 0;
}

.local-chat-model-info-specs {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 0.15rem 1rem;
  margin: 0.5rem 0;
}

.local-chat-model-info-specs dt {
  font-weight: bold;
}

.local-chat-model-info-specs dd {
  margin: 0;
}

.local-chat-model-info-best-for {
  margin: 0.5rem 0 0 0;
  font-size: 0.95em;
}

/* ── Restored session badge ─────────────────────────────────── */

.local-chat-restored-badge {
  font-size: 0.85em;
  margin-left: 0.5rem;
  transition: opacity 1s ease-out;
}

.local-chat-restored-badge-fade {
  opacity: 0;
}

/* ── Restore banner ─────────────────────────────────────────── */

.local-chat-restore-banner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem;
  padding: 0.75rem 1rem;
  margin-bottom: 0.75rem;
  border-radius: 0.5rem;
}

.local-chat-restore-banner-text {
  font-size: 0.95em;
}

.local-chat-restore-banner-actions {
  display: flex;
  gap: 0.5rem;
}

.local-chat-restore-banner-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
  min-height: 44px;
  min-width: 44px;
  padding: 0.4rem 0.75rem;
  border-radius: 0.25rem;
  font-size: 0.9em;
  cursor: pointer;
}

.local-chat-restore-banner-btn:hover,
.local-chat-restore-banner-btn:focus-visible {
  opacity: 1;
}

/* ── History section (welcome card) ─────────────────────────── */

.local-chat-history-section {
  width: 100%;
  max-width: 36rem;
  margin-top: 1.5rem;
  text-align: left;
}

.local-chat-history-heading {
  font-size: 1em;
  margin: 0 0 0.75rem 0;
  padding-bottom: 0.25rem;
}

.local-chat-history-list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.local-chat-history-entry {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 0.25rem 0.75rem;
  padding: 0.5rem 0;
}

.local-chat-history-entry:last-child {
  border-bottom: none;
}

.local-chat-history-title {
  font-weight: bold;
  flex: 1 1 100%;
}

.local-chat-history-meta {
  font-size: 0.85em;
  flex: 1 1 100%;
}

.local-chat-history-actions {
  display: flex;
  gap: 0.5rem;
  margin-top: 0.25rem;
}

.local-chat-history-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
  min-height: 44px;
  min-width: 44px;
  padding: 0.3rem 0.6rem;
  font-size: 0.8rem;
}

.local-chat-history-btn:hover,
.local-chat-history-btn:focus-visible {
  opacity: 1;
}

.local-chat-history-show-all {
  display: block;
  margin: 0.75rem auto 0 auto;
  padding: 0.4rem 1rem;
  font-size: 0.8rem;
  cursor: pointer;
  min-height: 44px;
}

.local-chat-history-show-all:hover,
.local-chat-history-show-all:focus-visible {
  opacity: 1;
}

/* ── History button (toolbar) ───────────────────────────────── */

.local-chat-history {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  min-height: 44px;
  padding: 0.4rem 0.75rem;
  font-size: 0.8rem;
  cursor: pointer;
  margin-right: 0.5rem;
}

.local-chat-history:disabled {
  cursor: not-allowed;
}

.local-chat-history:hover:not(:disabled) {
  opacity: 1;
}

/* ── History panel (overlay) ────────────────────────────────── */

.local-chat-history-panel {
  padding: 0.75rem;
  margin-bottom: 0.75rem;
  border-radius: 0.5rem;
}

.local-chat-history-panel-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 0.75rem;
}

.local-chat-history-panel-header h3 {
  margin: 0;
  font-size: 1.1em;
}

.local-chat-history-panel-close {
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
  min-height: 44px;
  min-width: 44px;
  padding: 0.3rem 0.6rem;
  font-size: 0.8rem;
}

.local-chat-history-empty {
  text-align: center;
  padding: 1rem;
}

/* ── Clear conversation button ───────────────────────────────── */

.local-chat-clear {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  min-height: 44px;
  font-size: 0.8rem;
  cursor: pointer;
}

.local-chat-clear:disabled {
  cursor: not-allowed;
}

.local-chat-clear:hover {
  opacity: 1;
}

/* ── Download button ─────────────────────────────────────────── */

.local-chat-download {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  min-height: 44px;
  padding: 0.4rem 0.75rem;
  font-size: 0.8rem;
  margin-right: 0.5rem;
}

.local-chat-download:disabled {
  cursor: not-allowed;
}

.local-chat-download:hover:not(:disabled) {
  opacity: 1;
}

/* ── Export menu ─────────────────────────────────────────────── */

.local-chat-export-wrapper {
  position: relative;
  display: inline-block;
}

.local-chat-export-menu {
  position: absolute;
  bottom: 100%;
  left: 0;
  margin: 0 0 0.25rem 0;
  padding: 0.25rem 0;
  list-style: none;
  border-radius: 0.35rem;
  min-width: 10rem;
  z-index: 100;
}

.local-chat-export-menu li {
  margin: 0;
  padding: 0;
}

.local-chat-export-menu button {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  width: 100%;
  min-height: 44px;
  padding: 0.5rem 0.75rem;
  font-size: 0.85rem;
  text-align: left;
  cursor: pointer;
  white-space: nowrap;
}

.local-chat-export-menu button:hover,
.local-chat-export-menu button:focus-visible {
  outline-offset: -2px;
}

/* ── Model badge ─────────────────────────────────────────────── */

.local-chat-model-badge {
  display: block;
  font-size: 0.75em;
  margin-bottom: 0.35rem;
}

/* ── Timestamps ──────────────────────────────────────────────── */

.local-chat-timestamp {
  display: block;
  font-size: 0.7em;
  margin-top: 0.35rem;
  text-align: right;
}

.local-chat-bubble-assistant .local-chat-timestamp {
  text-align: left;
}

/* ── System prompt preset bar ────────────────────────────────── */

.local-chat-preset-bar {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-top: 0.5rem;
  margin-bottom: 0.25rem;
}

.local-chat-preset-bar label {
  font-size: 0.9em;
}

.local-chat-preset-bar select {
  padding: 0.25rem 0.4rem;
  border-radius: 0.25rem;
  font-size: inherit;
}

/* ── Edit button on user bubbles ─────────────────────────────── */

.local-chat-edit-btn {
  display: block;
  margin-top: 0.35rem;
  padding: 0.25rem 0.5rem;
  font-size: 0.8em;
  min-height: 44px;
  min-width: 44px;
}

.local-chat-edit-btn:hover,
.local-chat-edit-btn:focus-visible {
  opacity: 1;
}

/* ── Edit mode ───────────────────────────────────────────────── */

.local-chat-bubble-editing {
  cursor: default;
}

.local-chat-edit-textarea {
  width: 100%;
  box-sizing: border-box;
  padding: 0.5rem;
  border-radius: 0.25rem;
  font-family: inherit;
  font-size: inherit;
  resize: vertical;
  min-height: 2.75rem;
}

.local-chat-edit-buttons {
  display: flex;
  gap: 0.5rem;
  margin-top: 0.5rem;
}

.local-chat-edit-buttons button {
  min-height: 44px;
  min-width: 44px;
  padding: 0.4rem 0.75rem;
  border-radius: 0.25rem;
  font-size: 0.9em;
  cursor: pointer;
}

/* ── Responsive ──────────────────────────────────────────────── */

@media (max-width: 30rem) {
  .local-chat-bubble {
    max-width: 95%;
  }
}

/* ── Reduced motion ──────────────────────────────────────────── */

@media (prefers-reduced-motion: reduce) {
  #local-chat-messages {
    scroll-behavior: auto;
  }

  .local-chat-typing-dot {
    animation: none;
    opacity: 0.6;
  }
}