.chat-shell {
  display: flex;
  flex-direction: column;
  height: calc(100vh - 160px);
  min-height: 320px;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
}

.chat-threads {
  display: flex; gap: 8px; padding: 10px 12px; overflow-x: auto;
  border-bottom: 1px solid var(--border); flex-shrink: 0;
}
.chat-thread {
  flex-shrink: 0; white-space: nowrap;
  background: var(--card-2); border: 1px solid var(--border); color: var(--text-dim);
  border-radius: 999px; padding: 6px 14px; font-size: 12.5px; font-weight: 600; cursor: pointer;
}
.chat-thread--active { background: var(--primary-wash); color: var(--primary); border-color: var(--primary-border); }

.chat-list {
  flex: 1;
  overflow-y: auto;
  padding: 16px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.chat-msg { display: flex; flex-direction: column; align-items: flex-start; max-width: 72%; }
.chat-msg--mine { align-self: flex-end; align-items: flex-end; }

.chat-msg__author { font-size: 11.5px; color: var(--text-dim); margin-bottom: 2px; padding: 0 4px; }

.chat-msg__row { display: flex; align-items: flex-end; gap: 6px; }
.chat-msg--mine .chat-msg__row { flex-direction: row; }

.chat-msg__actions { display: flex; gap: 2px; opacity: 0.55; transition: opacity 0.15s; }
.chat-msg:hover .chat-msg__actions { opacity: 1; }
.chat-msg__action {
  width: 24px; height: 24px; border-radius: 50%; flex-shrink: 0;
  background: var(--card-2); border: 1px solid var(--border); color: var(--text-dim);
  font-size: 12px; display: flex; align-items: center; justify-content: center; cursor: pointer;
}
.chat-msg__action:hover { color: var(--text); background: var(--border); }

.chat-msg__bubble {
  background: var(--surface-muted); border: 1px solid var(--border);
  border-radius: 16px; padding: 9px 13px; font-size: 14px; line-height: 1.4;
  white-space: pre-wrap; word-break: break-word;
}
.chat-msg--mine .chat-msg__bubble { background: var(--accent); color: var(--on-accent); border-color: var(--accent); }
.chat-msg__time { font-size: 10.5px; color: var(--text-faint); margin-top: 2px; padding: 0 4px; }
.chat-msg__edited { font-style: italic; }

.chat-msg__edit-row { width: min(360px, 80vw); display: flex; flex-direction: column; gap: 6px; }
.chat-msg__edit-input {
  width: 100%; resize: vertical; min-height: 60px; font: inherit; font-size: 14px;
  border-radius: 12px; padding: 9px 12px;
}
.chat-msg__edit-actions { display: flex; gap: 6px; justify-content: flex-end; }

.chat-input-row {
  display: flex; gap: 8px; padding: 12px; border-top: 1px solid var(--border);
}
.chat-input-row .form-input { flex: 1; }

.chat-emoji-wrap { position: relative; flex-shrink: 0; }
.chat-emoji-picker {
  display: none; position: absolute; bottom: calc(100% + 8px); left: 0;
  width: 260px; max-height: 200px; overflow-y: auto;
  background: var(--card-2); border: 1px solid var(--border); border-radius: 14px;
  padding: 8px; box-shadow: var(--shadow-lg);
  grid-template-columns: repeat(8, 1fr); gap: 2px; z-index: 50;
}
.chat-emoji-picker--show { display: grid; }
.chat-emoji-item {
  background: transparent; border: none; border-radius: 8px;
  font-size: 19px; line-height: 1; padding: 6px 0; cursor: pointer;
}
.chat-emoji-item:hover { background: var(--border); }