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

.task-chat-transcript {
  display: flex;
  flex-direction: column;
  gap: var(--space-lg);
  min-height: 0;
  max-height: var(--task-chat-transcript-max-height, 70vh);
  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-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--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-entry--tool {
  background: var(--bg-tertiary);
}

.task-chat-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-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-entry--thinking .task-chat-entry-kicker {
  color: var(--color-warning);
}

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

.task-chat-composer {
  display: flex;
  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 {
    max-height: var(--task-chat-transcript-mobile-max-height, 62vh);
    padding: var(--space-sm);
  }

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

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

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

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

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