/* Chat thread — uses global :root tokens from styles.css for consistent contrast */

#messages.chat-thread {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

/* Scroll host: visible frame so thread separates from page bg */
.chat-messages-scroll {
  min-height: 200px;
  max-height: min(60vh, 520px);
  overflow-y: auto;
  padding: 16px;
  background: var(--ade-bg-surface);
  border: 1px solid var(--ade-border);
  border-radius: 8px;
  margin-bottom: 16px;
}

.chat-turn {
  max-width: 92%;
  border-radius: 12px;
  border: 1px solid var(--ade-border);
  padding: 10px 12px;
  font-size: 14px;
  line-height: 1.45;
  color: var(--ade-text);
}

.chat-turn__label {
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--ade-text-dim);
  margin-bottom: 6px;
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}

.chat-turn__label-tag {
  font-weight: 600;
  text-transform: none;
  letter-spacing: 0;
  font-size: 11px;
  padding: 3px 10px;
  border-radius: 999px;
  background: var(--ade-bg-input);
  color: var(--ade-text-muted);
  border: 1px solid var(--ade-border);
}

.chat-turn--user {
  margin-left: auto;
  background: var(--ade-user-bubble);
  border-color: var(--ade-user-border);
  color: var(--ade-text);
}

.chat-turn--assistant {
  align-self: flex-start;
  background: var(--ade-bg-input);
  border-color: var(--ade-border-strong);
}

.chat-turn--system {
  align-self: flex-start;
  background: var(--ade-bg-elevated);
  border-color: var(--ade-border);
  color: var(--ade-text-muted);
  font-size: 13px;
}

.chat-turn--reasoning {
  align-self: flex-start;
  background: rgba(139, 92, 246, 0.14);
  border-color: #9b7be8;
  border-left-width: 3px;
  border-left-color: #a78bfa;
}

.chat-turn--reasoning .chat-turn__label {
  color: #d4c9fc;
}

.chat-turn--hidden-reasoning {
  align-self: flex-start;
  background: var(--ade-bg-elevated);
  border-color: var(--ade-border-strong);
  border-left: 3px solid var(--ade-text-dim);
  font-size: 13px;
  color: var(--ade-text-muted);
}

.chat-turn--tool-call {
  align-self: stretch;
  max-width: 100%;
  background: rgba(16, 185, 129, 0.12);
  border-color: #3db889;
  border-left: 3px solid #34d399;
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  font-size: 13px;
  color: var(--ade-text);
}

.chat-turn--tool-call .chat-turn__label {
  color: #86efce;
}

.chat-turn--tool-return {
  align-self: stretch;
  max-width: 100%;
  background: rgba(59, 130, 246, 0.12);
  border-color: #5b8def;
  border-left: 3px solid #60a5fa;
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  font-size: 13px;
  color: var(--ade-text);
}

.chat-turn--tool-return.chat-turn--error {
  background: rgba(239, 68, 68, 0.14);
  border-color: #f87171;
  border-left-color: #f87171;
}

.chat-turn--tool-return .chat-turn__label {
  color: #93c5fd;
}

.chat-turn--approval {
  align-self: stretch;
  max-width: 100%;
  background: rgba(245, 158, 11, 0.14);
  border-color: #e8a035;
  border-left: 3px solid #fbbf24;
}

.chat-turn--approval .chat-turn__label {
  color: #fcd34d;
}

/* Markdown */
.chat-md {
  word-break: break-word;
  overflow-wrap: anywhere;
  color: var(--ade-text);
}

.chat-md--plain {
  margin: 0;
  white-space: pre-wrap;
}

.chat-md p {
  margin: 0 0 0.65em;
}
.chat-md p:last-child {
  margin-bottom: 0;
}

.chat-md h1, .chat-md h2, .chat-md h3, .chat-md h4 {
  margin: 0.75em 0 0.4em;
  font-size: 1.05em;
  font-weight: 700;
  color: var(--ade-text);
}

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

.chat-md ul, .chat-md ol {
  margin: 0.4em 0 0.65em;
  padding-left: 1.35em;
}

.chat-md li {
  margin-bottom: 0.25em;
}

.chat-md blockquote {
  margin: 0.5em 0;
  padding-left: 12px;
  border-left: 3px solid var(--ade-border-strong);
  color: var(--ade-text-muted);
}

.chat-md a {
  color: var(--ade-link);
  font-weight: 500;
}

.chat-md code {
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  font-size: 0.9em;
  background: var(--ade-bg);
  padding: 0.15em 0.45em;
  border-radius: 4px;
  border: 1px solid var(--ade-border);
  color: #e8d5b0;
}

.chat-md pre {
  margin: 0.65em 0;
  padding: 10px 12px;
  background: var(--ade-bg);
  border: 1px solid var(--ade-border);
  border-radius: 8px;
  overflow-x: auto;
  font-size: 12px;
  line-height: 1.45;
  color: var(--ade-text);
}

.chat-md pre code {
  background: none;
  border: none;
  padding: 0;
  font-size: inherit;
  color: inherit;
}

.chat-md table {
  border-collapse: collapse;
  margin: 0.65em 0;
  font-size: 13px;
}

.chat-md th, .chat-md td {
  border: 1px solid var(--ade-border);
  padding: 6px 10px;
}

.chat-md th {
  background: var(--ade-bg-input);
  color: var(--ade-text);
  font-weight: 600;
}

.chat-md-fallback {
  margin: 0;
  white-space: pre-wrap;
  word-break: break-word;
  font-size: 13px;
  color: var(--ade-text-muted);
}

.chat-tool-meta {
  font-size: 11px;
  color: var(--ade-text-muted);
  font-weight: 600;
  margin-bottom: 6px;
}

.chat-json {
  margin: 0;
  padding: 10px 12px;
  background: var(--ade-bg);
  border-radius: 8px;
  border: 1px solid var(--ade-border);
  overflow-x: auto;
  white-space: pre-wrap;
  word-break: break-word;
  color: #d4e4c4;
  font-size: 12px;
}

.chat-reasoning-body {
  font-size: 13px;
  color: #e8e2ff;
}

.chat-reasoning-body.chat-md {
  color: var(--ade-text);
}

/* Collapsible rows */
.chat-details {
  margin: 0;
}

.chat-collapsible-summary {
  display: flex;
  align-items: center;
  cursor: pointer;
  user-select: none;
  list-style: none;
  padding: 2px 0 6px;
  margin: 0;
  font-size: 12px;
  line-height: 1.35;
}

.chat-collapsible-summary::-webkit-details-marker,
.chat-collapsible-summary::marker {
  display: none;
}

.chat-summary-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px 8px;
  width: 100%;
}

.chat-summary-chevron {
  display: inline-block;
  width: 0.45em;
  height: 0.45em;
  border-right: 2px solid currentColor;
  border-bottom: 2px solid currentColor;
  transform: rotate(-45deg);
  transition: transform 0.15s ease;
  flex-shrink: 0;
  margin-top: 2px;
  opacity: 0.9;
}

.chat-details[open] > .chat-collapsible-summary .chat-summary-chevron {
  transform: rotate(45deg);
  margin-top: -2px;
}

.chat-summary-title {
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  font-size: 11px;
  color: var(--ade-text-dim);
}

.chat-summary-row .chat-turn__label-tag {
  text-transform: none;
  letter-spacing: 0;
  font-weight: 600;
}

.chat-details-body {
  padding-top: 4px;
}

.chat-turn--reasoning .chat-summary-title {
  color: #ddd6fe;
}

.chat-turn--reasoning .chat-collapsible-summary {
  color: #e9d5ff;
}

.chat-turn--hidden-reasoning .chat-summary-title {
  color: var(--ade-text-muted);
}

.chat-turn--tool-call .chat-summary-title,
.chat-turn--tool-return .chat-summary-title {
  color: #c4c9d4;
}

.chat-turn--tool-call .chat-collapsible-summary {
  color: #a7f3d0;
}

.chat-turn--tool-return .chat-collapsible-summary {
  color: #bfdbfe;
}

.chat-turn--approval .chat-summary-title {
  color: #fde68a;
}

.chat-turn--approval .chat-collapsible-summary {
  color: #fde047;
}