/* Owner Chat — ChatGPT-style pipeline surface */

.chat-surface {
  display: flex;
  flex-direction: column;
  height: 100%;
  min-height: 0;
  overflow: hidden;
}

.chat-body {
  --chat-col: min(36rem, calc(100% - 2 * var(--space-4)));
  position: relative;
  display: flex;
  flex: 1 1 0;
  flex-direction: column;
  min-height: 0;
  overflow: hidden;
}

.chat-transcript {
  display: flex;
  flex: 1 1 0;
  flex-direction: column;
  min-height: 0;
  overflow: auto;
  padding: var(--space-4);
  /* Room under the floating capsule (row-h + bottom offset + attach slack). */
  padding-bottom: calc(var(--row-h) + var(--space-6) + var(--space-4));
}

.chat-thread {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
  width: var(--chat-col);
  margin-inline: auto;
}

.chat-bubble {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  max-width: 100%;
}

.chat-bubble--user {
  align-self: flex-end;
  width: fit-content;
  max-width: 100%;
}

.chat-bubble--user:has(.chat-bubble__cards) {
  width: min(100%, 22rem);
}

.chat-bubble--assistant {
  align-self: stretch;
  width: 100%;
}

.chat-bubble__text {
  margin: 0;
  padding: var(--space-3) var(--space-4);
  border-radius: var(--radius-md, 6px);
  background: color-mix(in srgb, var(--text) 6%, transparent);
  color: var(--text);
  line-height: 1.45;
}

.chat-bubble--user .chat-bubble__text {
  background: color-mix(in srgb, var(--text) 12%, transparent);
}

.chat-bubble__text p {
  margin: 0;
}

.chat-bubble__text p + p {
  margin-top: var(--space-2);
}

.chat-bubble__cards {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  width: 100%;
}

/* Floating capsule composer — same column width as the thread. */
.chat-composer {
  position: absolute;
  left: 50%;
  bottom: var(--space-4);
  z-index: 2;
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  width: var(--chat-col);
  transform: translateX(-50%);
  pointer-events: none;
}

.chat-composer__attach {
  pointer-events: auto;
  max-width: 100%;
  padding: var(--space-3);
  border: 1px solid var(--border);
  border-radius: 6px;
  background: var(--bg-elevated, var(--bg));
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.12);
}

.chat-composer__pending {
  pointer-events: auto;
  display: flex;
  align-items: center;
  gap: var(--space-2);
  max-width: 100%;
  min-height: var(--control-h);
  padding: 0 var(--space-2) 0 var(--space-3);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--bg-elevated, var(--bg));
}

.chat-composer__pending-name {
  flex: 1 1 auto;
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.chat-composer__pending > .btn.icon {
  flex-shrink: 0;
}

.chat-composer__row {
  pointer-events: auto;
  display: flex;
  align-items: center;
  gap: var(--space-2);
  height: var(--row-h);
  padding: 0 var(--space-2) 0 var(--space-3);
  border: 1px solid var(--border);
  border-radius: 9999px;
  background: var(--bg-elevated, var(--bg));
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.12);
}

.chat-composer__input {
  flex: 1 1 auto;
  min-width: 0;
  height: 100%;
  max-height: var(--row-h);
  margin: 0;
  padding: 0;
  border: none;
  border-radius: 0;
  background: transparent;
  color: var(--text);
  font: inherit;
  line-height: var(--row-h);
  resize: none;
  overflow: hidden;
  white-space: nowrap;
}

.chat-composer__input::placeholder {
  color: var(--text-muted, color-mix(in srgb, var(--text) 45%, transparent));
}

.chat-composer__input:focus {
  outline: none;
}

.chat-composer__row > .btn.icon {
  flex-shrink: 0;
  border-radius: 9999px;
}

.chat-composer__row > .btn.primary.icon {
  border-color: transparent;
}

/* New chat — welcome + composer centered as one stack. */
.chat-body--empty {
  align-items: center;
  justify-content: center;
  gap: var(--space-4);
  padding: var(--space-4);
}

.chat-body--empty .chat-transcript {
  flex: 0 1 auto;
  width: var(--chat-col);
  max-height: 40%;
  padding: 0;
  overflow: auto;
}

.chat-body--empty .chat-thread {
  width: 100%;
}

.chat-body--empty .chat-composer {
  position: relative;
  left: auto;
  bottom: auto;
  width: var(--chat-col);
  transform: none;
}

.chat-history-actions {
  display: flex;
  padding: 0 var(--space-2) var(--space-2);
}