/* AI 导览员会话组件（浮窗 + 独立页面共用） */
.agent-chat-widget {
  --chat-navy: #1f3a8a;
  --chat-accent: #2f4ea9;
  --chat-accent-2: #3a5fc4;
  --chat-soft: #eef2fc;
  --chat-ink: #26314d;
  --chat-muted: #5b6480;
  --chat-faint: #8a93ad;
  --chat-line: #e3e8f3;
  --chat-surface: #f7f9fd;
  display: flex;
  flex-direction: column;
  min-height: 0;
  flex: 1 1 auto;
  background: #fff;
  color: var(--chat-ink);
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

.agent-chat-messages {
  flex: 1;
  min-height: 0;
  overflow-y: auto;
  padding: 18px 14px 8px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  overscroll-behavior: contain;
  scrollbar-width: thin;
  scrollbar-color: #ccd6ea transparent;
}

.agent-chat-messages::-webkit-scrollbar {
  width: 6px;
}

.agent-chat-messages::-webkit-scrollbar-thumb {
  background: #ccd6ea;
  border-radius: 999px;
}

.agent-chat-messages::-webkit-scrollbar-thumb:hover {
  background: #b7c4de;
}

/* ---------- 欢迎卡 ---------- */
.agent-chat-welcome {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  padding: 13px 13px 14px;
  border: 1px solid #dde5f6;
  border-radius: 14px 14px 14px 5px;
  background: linear-gradient(135deg, #f6f9ff 0%, #eef2fc 100%);
}

.agent-chat-mark {
  width: 30px;
  height: 30px;
  flex: 0 0 30px;
  display: inline-grid;
  place-items: center;
  border-radius: 10px;
  background: linear-gradient(135deg, #2f4ea9 0%, #3a5fc4 100%);
  color: #fff;
  font-size: 14px;
  box-shadow: 0 3px 10px rgba(47, 78, 169, .26);
}

.agent-chat-welcome strong {
  display: block;
  margin: 1px 0 4px;
  color: var(--chat-navy);
  font-size: 13px;
  letter-spacing: .3px;
}

.agent-chat-welcome p {
  margin: 0;
  color: var(--chat-muted);
  font-size: 12px;
  line-height: 1.65;
}

/* ---------- 消息气泡 ---------- */
.agent-chat-message {
  max-width: 88%;
  padding: 10px 13px;
  border-radius: 14px;
  font-size: 13px;
  line-height: 1.75;
  white-space: pre-wrap;
  overflow-wrap: anywhere;
}

.agent-chat-message-user {
  align-self: flex-end;
  border-bottom-right-radius: 5px;
  background: linear-gradient(135deg, #2f4ea9 0%, #3a5fc4 100%);
  color: #fff;
  box-shadow: 0 4px 14px rgba(47, 78, 169, .22);
}

.agent-chat-message-assistant {
  align-self: flex-start;
  border: 1px solid var(--chat-line);
  border-bottom-left-radius: 5px;
  background: var(--chat-surface);
  color: var(--chat-ink);
}

.agent-chat-message-error {
  align-self: flex-start;
  border: 1px solid #f0d7cf;
  border-left: 3px solid #c4573c;
  background: #fdf6f4;
  color: #8c3928;
}

/* ---------- 状态行 ---------- */
.agent-chat-status {
  min-height: 18px;
  padding: 2px 16px 0;
  color: var(--chat-faint);
  font-size: 11px;
  letter-spacing: .2px;
}

.agent-chat-status:empty {
  min-height: 6px;
  padding: 0;
}

/* ---------- 输入区 ---------- */
.agent-chat-composer {
  flex: 0 0 auto;
  margin: 0 12px 12px;
  padding: 9px 11px 7px;
  border: 1px solid #dde5f6;
  border-radius: 14px;
  background: #fff;
  box-shadow: 0 6px 20px rgba(31, 58, 138, .07);
  transition: border-color .15s, box-shadow .15s;
}

.agent-chat-composer:focus-within {
  border-color: #dde5f6;
}

.agent-chat-composer textarea {
  display: block;
  width: 100%;
  max-height: 128px;
  min-height: 28px;
  resize: none;
  border: 0;
  outline: 0;
  padding: 4px 2px;
  color: var(--chat-ink);
  background: transparent;
  font: inherit;
  font-size: 13px;
  line-height: 1.65;
}

.agent-chat-composer textarea::placeholder {
  color: var(--chat-faint);
}

.agent-chat-composer-footer {
  min-height: 28px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  color: var(--chat-faint);
  font-size: 10.5px;
}

.agent-chat-send {
  width: 30px;
  height: 30px;
  flex: 0 0 30px;
  display: inline-grid;
  place-items: center;
  border: 0;
  border-radius: 10px;
  background: linear-gradient(135deg, #2f4ea9 0%, #3a5fc4 100%);
  color: #fff;
  cursor: pointer;
  font-size: 14px;
  box-shadow: 0 3px 10px rgba(47, 78, 169, .26);
  transition: filter .15s, box-shadow .15s;
}

.agent-chat-send:hover:not(:disabled) {
  filter: brightness(1.06);
  box-shadow: 0 5px 14px rgba(47, 78, 169, .32);
}

.agent-chat-send:disabled {
  background: #c3cde6;
  box-shadow: none;
  cursor: wait;
}

.agent-chat-send:focus-visible {
  outline: 2px solid #3a5fc4;
  outline-offset: 2px;
}

.agent-chat-composer textarea:focus,
.agent-chat-composer textarea:focus-visible {
  outline: none;
  box-shadow: none;
}

@media (max-width: 640px) {
  .agent-chat-messages {
    padding: 14px 10px 6px;
  }

  .agent-chat-message {
    max-width: 92%;
  }

  .agent-chat-composer {
    margin: 0 8px 8px;
    padding: 8px 10px 6px;
  }
}

@media (prefers-reduced-motion: no-preference) {
  .agent-chat-message {
    animation: agent-chat-arrive .18s ease-out both;
  }

  @keyframes agent-chat-arrive {
    from { opacity: 0; transform: translateY(5px); }
    to { opacity: 1; transform: translateY(0); }
  }
}