.task-chat-tab {
  display: flex;
  flex: 1;
  flex-direction: column;
  gap: var(--space-md);
  min-height: 0;
  height: 100%;
}

.task-chat-transcript {
  display: flex;
  flex: 1 1 auto;
  flex-direction: column;
  gap: var(--space-lg);
  min-height: 0;
  overflow-y: auto;
  padding: var(--space-md);
  border: var(--btn-border-width) solid var(--border);
  border-radius: var(--radius-lg);
  background: var(--bg-secondary);
}

.task-chat-empty {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  min-height: calc(var(--space-2xl) * 3);
  padding: var(--space-xl);
  color: var(--text-muted);
  text-align: center;
}

.task-chat-group {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: var(--space-sm);
}

.task-chat-group-header {
  display: flex;
  align-items: center;
  align-self: start;
  gap: var(--space-sm);
  min-width: min(calc(var(--space-2xl) * 4), 32vw);
  color: var(--text-muted);
}

.task-chat-avatar {
  flex: 0 0 auto;
}

.task-chat-role-label {
  color: var(--text);
  font-weight: 600;
}

.task-chat-group-meta {
  color: var(--text-muted);
  font-size: var(--space-md);
}

.task-chat-group-bubbles {
  display: flex;
  min-width: 0;
  flex-direction: column;
  gap: var(--space-sm);
}

.task-chat-user-group {
  display: flex;
  min-width: 0;
  flex-direction: column;
  align-items: flex-end;
  gap: var(--space-xs);
}

.task-chat-user-header {
  padding-inline: var(--space-sm);
  color: var(--text-muted);
}

.task-chat-entry {
  min-width: 0;
  padding: var(--space-sm) var(--space-md);
  border: var(--btn-border-width) solid var(--border);
  border-radius: var(--radius-lg);
  background: var(--surface);
  color: var(--text);
  overflow-wrap: anywhere;
}

.task-chat-entry--user {
  max-width: min(100%, calc(var(--space-2xl) * 18));
  border-color: color-mix(in srgb, var(--accent) 45%, var(--border));
  background: color-mix(in srgb, var(--accent) 12%, var(--surface));
  box-shadow: var(--shadow-sm);
}

.task-chat-tool-group,
.task-chat-thinking {
  min-width: 0;
  border: var(--btn-border-width) solid var(--border);
  border-radius: var(--radius-lg);
  background: var(--surface);
  color: var(--text);
  overflow-wrap: anywhere;
}

.task-chat-tool-group {
  background: var(--bg-tertiary);
}

.task-chat-tool-group-summary,
.task-chat-thinking-summary {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  padding: var(--space-sm) var(--space-md);
  cursor: pointer;
  list-style: none;
}

.task-chat-tool-group-summary {
  flex-wrap: wrap;
}

.task-chat-tool-group-summary::-webkit-details-marker,
.task-chat-thinking-summary::-webkit-details-marker {
  display: none;
}

.task-chat-tool-group-summary::marker,
.task-chat-thinking-summary::marker {
  content: "";
}

.task-chat-tool-group-summary:focus-visible,
.task-chat-thinking-summary:focus-visible {
  outline: none;
  box-shadow: var(--focus-ring-strong);
}

.task-chat-tool-group-count {
  flex: 0 0 auto;
  font-weight: 600;
}

.task-chat-tool-group-names {
  min-width: 0;
  color: var(--text-muted);
  font-size: var(--space-md);
  overflow-wrap: anywhere;
}

.task-chat-tool-group-overflow {
  color: var(--text-muted);
  white-space: nowrap;
}

.task-chat-tool-group-error-count {
  flex: 0 0 auto;
  color: var(--color-error);
  font-size: var(--space-md);
  font-weight: 600;
}

.task-chat-tool-group-entries,
.task-chat-thinking-body {
  display: flex;
  flex-direction: column;
  padding: 0 var(--space-md) var(--space-md);
}

.task-chat-tool-group-entries {
  gap: var(--space-sm);
}

.task-chat-tool-entry {
  min-width: 0;
  padding: var(--space-sm) var(--space-md);
  border: var(--btn-border-width) solid var(--border);
  border-radius: var(--radius-md);
  background: var(--surface);
  color: var(--text);
  overflow-wrap: anywhere;
}

.task-chat-tool-entry--tool-error {
  border-color: color-mix(in srgb, var(--color-error) 45%, var(--border));
  background: color-mix(in srgb, var(--color-error) 8%, var(--surface));
}

.task-chat-thinking {
  border-color: color-mix(in srgb, var(--color-warning) 35%, var(--border));
  background: color-mix(in srgb, var(--color-warning) 8%, var(--surface));
}

.task-chat-thinking-summary {
  color: var(--color-warning);
  font-weight: 600;
}

.task-chat-entry-kicker {
  margin-bottom: var(--space-xs);
  color: var(--text-muted);
  font-size: var(--space-md);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.task-chat-tool-entry--tool-error .task-chat-entry-kicker {
  color: var(--color-error);
}

.task-chat-entry-text {
  white-space: pre-wrap;
}

.task-chat-markdown > :first-child,
.task-chat-markdown p:first-child {
  margin-top: 0;
}

.task-chat-markdown > :last-child,
.task-chat-markdown p:last-child {
  margin-bottom: 0;
}

.task-chat-tool-detail-block {
  margin-top: var(--space-sm);
}

.task-chat-tool-detail-label {
  color: var(--text-muted);
  font-size: var(--space-md);
  font-weight: 600;
}

.task-chat-tool-detail {
  margin: var(--space-xs) 0 0;
  max-width: 100%;
  overflow-x: auto;
  white-space: pre-wrap;
  word-break: break-word;
}

.task-chat-composer {
  display: flex;
  flex: 0 0 auto;
  flex-direction: column;
  gap: var(--space-sm);
  padding: var(--space-md);
}

.task-chat-session-hint {
  color: var(--text-muted);
  font-size: var(--space-md);
}

.task-chat-composer-row {
  display: flex;
  align-items: flex-end;
  gap: var(--space-sm);
}

.task-chat-input {
  min-height: calc(var(--space-2xl) + var(--space-sm));
  max-height: var(--task-chat-composer-max-height, 40vh);
  resize: none;
  flex: 1 1 auto;
}

.task-chat-send {
  flex: 0 0 auto;
  display: inline-flex;
  align-items: center;
  gap: var(--space-xs);
}

@media (max-width: 768px) {
  .task-chat-tab {
    gap: var(--space-sm);
  }

  .task-chat-transcript {
    flex: 1 1 auto;
    min-height: 0;
    padding: var(--space-sm);
  }

  .task-chat-group {
    grid-template-columns: 1fr;
  }

  .task-chat-group-header {
    min-width: 0;
  }

  .task-chat-user-group {
    align-items: stretch;
  }

  .task-chat-user-header {
    align-self: flex-end;
  }

  .task-chat-entry--user {
    max-width: 100%;
  }

  .task-chat-tool-group-summary,
  .task-chat-thinking-summary {
    align-items: flex-start;
    flex-direction: column;
  }

  .task-chat-tool-group-names,
  .task-chat-tool-group-error-count {
    width: 100%;
  }

  .task-chat-tool-group-entries,
  .task-chat-thinking-body {
    padding-inline: var(--space-sm);
  }

  .task-chat-tool-entry {
    padding: var(--space-sm);
  }

  .task-chat-composer {
    padding: var(--space-sm);
  }

  .task-chat-composer-row {
    flex-direction: column;
    align-items: stretch;
  }

  .task-chat-send {
    justify-content: center;
  }
}