/* 🐕🦌💕 聊天室 — 消息区域 */

.messages {
  flex: 1; overflow-y: auto; padding: 16px;
  scroll-behavior: smooth;
}
.messages::-webkit-scrollbar { width: 4px; }
.messages::-webkit-scrollbar-thumb { background: rgba(180,160,130,0.2); border-radius: 2px; }

.empty-state {
  display: flex; flex-direction: column;
  align-items: center; justify-content: center;
  height: 100%; gap: 10px; opacity: 0.45;
}
.empty-state .big { font-size: 48px; }
.empty-state .text { font-size: 14px; color: var(--text-secondary); text-align: center; line-height: 1.8; }

.msg-row {
  display: flex; margin-bottom: 12px;
  animation: fadeIn 0.3s ease-out;
}
.msg-row.user { justify-content: flex-end; }
.msg-row.assistant { justify-content: flex-start; }
.msg-wrap { max-width: 85%; min-width: 50px; }

/* Thinking */
.thinking-block {
  margin-bottom: 10px; border-left: 3px solid rgba(180,160,130,0.3);
  border-radius: 0 8px 8px 0; overflow: hidden;
}
.thinking-toggle {
  display: flex; align-items: center; gap: 6px; width: 100%;
  padding: 6px 10px; background: rgba(180,160,130,0.06);
  border: none; cursor: pointer; font: 12px var(--font);
  color: rgba(120,100,70,0.6); text-align: left;
}
.thinking-toggle .arrow { transition: transform 0.2s; display: inline-block; font-size: 10px; }
.thinking-toggle .arrow.open { transform: rotate(90deg); }
.thinking-content {
  padding: 8px 14px 10px; font-size: 14px;
  color: rgba(100,80,50,0.55); background: rgba(180,160,130,0.03);
  line-height: 1.6; font-style: italic; white-space: pre-wrap; word-break: break-word;
  display: none;
}
.thinking-content.open { display: block; }

/* Tool call blocks */
.tool-call-block { margin-bottom: 6px; }
.tool-call-toggle { background: none; border: 1px solid rgba(180,160,130,0.3); border-radius: 8px; padding: 4px 10px; font-size: 12px; cursor: pointer; color: #8a7a6a; display: flex; align-items: center; gap: 6px; width: 100%; text-align: left; }
.tool-call-toggle:hover { background: rgba(180,160,130,0.1); }
.tool-call-toggle .arrow { transition: transform 0.2s; display: inline-block; font-size: 10px; }
.tool-call-toggle .arrow.open { transform: rotate(90deg); }
.tool-call-detail { display: none; margin-top: 4px; padding: 8px 10px; background: rgba(180,160,130,0.08); border-radius: 8px; font-size: 12px; color: #6a5a4a; word-break: break-all; white-space: pre-wrap; max-height: 200px; overflow-y: auto; }
.tool-call-detail.open { display: block; }
.tool-call-label { font-weight: 600; color: #8a7a6a; margin-bottom: 2px; }

/* Bubbles */
.bubble {
  padding: 12px 16px; font-size: 15.5px; line-height: 1.75;
  white-space: pre-wrap; word-break: break-word;
}
.bubble.user {
  background: var(--user-bubble); color: #3a3228;
  border-radius: var(--radius) var(--radius) 4px var(--radius);
  box-shadow: var(--shadow-soft);
}
.bubble.assistant {
  background: var(--ai-bubble); color: var(--text-primary);
  border-radius: var(--radius) var(--radius) var(--radius) 4px;
  box-shadow: 0 1px 6px rgba(0,0,0,0.04);
  backdrop-filter: blur(8px); -webkit-backdrop-filter: blur(8px);
  border: 1px solid rgba(180,160,130,0.1);
}
.bubble code {
  background: rgba(0,0,0,0.08); padding: 1px 5px; border-radius: 3px;
  font-size: 0.9em; font-family: 'Fira Code', monospace;
}
.bubble pre {
  background: rgba(0,0,0,0.1); border-radius: 8px;
  padding: 10px 14px; margin: 6px 0; font-size: 13px;
  font-family: 'Fira Code', monospace; overflow-x: auto; line-height: 1.5;
  white-space: pre;
}
.msg-meta {
  font-size: 12px; color: var(--text-muted); margin-top: 3px;
  padding-left: 6px;
}

/* Copy button */
.copy-btn {
  background: none; border: none; cursor: pointer;
  font-size: 13px; opacity: 0.4; padding: 2px 4px;
  transition: opacity 0.2s;
}
.copy-btn:hover { opacity: 0.8; }
.copy-btn.copied { opacity: 0.8; }

/* Loading */
.loading-row {
  display: flex; justify-content: flex-start; margin-bottom: 12px;
}
.loading-bubble {
  padding: 11px 18px;
  border-radius: var(--radius) var(--radius) var(--radius) 4px;
  background: var(--ai-bubble); backdrop-filter: blur(8px);
  border: 1px solid rgba(180,160,130,0.1);
  box-shadow: 0 1px 6px rgba(0,0,0,0.04);
  display: flex; align-items: center; gap: 4px;
}
.dot {
  width: 6px; height: 6px; border-radius: 50%; background: var(--accent);
  animation: bounce 1.2s ease-in-out infinite;
}
.dot:nth-child(2) { animation-delay: 0.15s; }
.dot:nth-child(3) { animation-delay: 0.3s; }
.loading-text { margin-left: 8px; font-size: 13px; color: var(--text-secondary); }

/* Error */
.error-msg {
  margin: 8px auto; padding: 8px 14px; max-width: 90%;
  background: rgba(200,100,100,0.08); border: 1px solid rgba(200,100,100,0.2);
  border-radius: 10px; font-size: 13px; color: #a05555;
}

@media (max-width: 600px) {
  .messages { padding: 14px 12px; }
  .msg-wrap { max-width: 90%; }
  .bubble { font-size: 15px; }
}

/* 工具循环中间轮文本 */
.tool-round-text {
  padding: 6px 12px;
  margin: 4px 0;
  font-size: 13px;
  color: var(--text-secondary, #999);
  border-left: 2px solid var(--border-color, rgba(255,255,255,0.1));
}

/* === 分支导航 === */
.branch-nav {
  display: flex; align-items: center; justify-content: center;
  gap: 6px; margin-bottom: 4px;
  font-size: 12px; color: var(--text-muted);
}
.branch-arrow {
  background: none; border: 1px solid rgba(180,160,130,0.25);
  border-radius: 4px; padding: 1px 6px; cursor: pointer;
  font-size: 11px; color: var(--text-secondary);
  transition: background 0.15s, border-color 0.15s;
}
.branch-arrow:hover:not([disabled]) { background: rgba(180,160,130,0.12); border-color: rgba(180,160,130,0.4); }
.branch-arrow[disabled] { opacity: 0.25; cursor: default; }
.branch-label { font-size: 11px; color: var(--text-muted); min-width: 32px; text-align: center; }

/* === 操作按钮（✏️ 🔄） === */
.meta-action {
  background: none; border: none; cursor: pointer;
  font-size: 13px; opacity: 0.35; padding: 2px 3px;
  transition: opacity 0.2s;
}
.meta-action:hover { opacity: 0.8; }

/* === 编辑模式 === */
.edit-area { width: 100%; }
.edit-textarea {
  width: 100%; min-height: 60px; max-height: 200px;
  padding: 10px 14px; font-size: 15px; line-height: 1.6;
  font-family: var(--font); color: var(--text-primary);
  background: var(--user-bubble); border: 2px solid var(--accent);
  border-radius: var(--radius); resize: vertical;
  box-sizing: border-box;
}
.edit-textarea:focus { outline: none; border-color: var(--accent); }
.edit-buttons {
  display: flex; justify-content: flex-end; gap: 8px; margin-top: 6px;
}
.edit-btn {
  padding: 5px 14px; border-radius: 8px; border: none;
  font-size: 13px; cursor: pointer; font-family: var(--font);
}
.edit-btn.cancel { background: rgba(180,160,130,0.12); color: var(--text-secondary); }
.edit-btn.cancel:hover { background: rgba(180,160,130,0.2); }
.edit-btn.submit { background: var(--accent); color: white; }
.edit-btn.submit:hover { opacity: 0.9; }