/* ============================================================
   chat.css — 聊天页全部样式：顶栏、消息、输入区、状态栏、菜单、历史
============================================================ */

/* ── 聊天页容器 ────────────────────────────────────────────── */
#page-chat {
  padding: 0;
  display: none;
  flex-direction: column;
  height: 100vh;
}
#page-chat.active { display: flex; }

/* ── 聊天顶栏 ──────────────────────────────────────────────── */
.chat-topbar {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 12px 16px;
  background: linear-gradient(180deg, rgba(10,14,26,.97), rgba(10,14,26,.72));
  backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--line);
  flex-shrink: 0;
}
.chat-back {
  width: 32px;
  height: 32px;
  display: grid;
  place-items: center;
  border-radius: 10px;
  background: rgba(255,255,255,.06);
  cursor: pointer;
  font-size: 15px;
  flex-shrink: 0;
  transition: background .15s;
}
.chat-back:active { background: rgba(255,255,255,.12); }
.chat-avatar {
  width: 40px;
  height: 40px;
  border-radius: 13px;
  display: grid;
  place-items: center;
  font-weight: 700;
  font-size: 17px;
  flex-shrink: 0;
  background: linear-gradient(135deg, var(--purple), var(--pink));
  overflow: hidden;
}
.chat-avatar img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center top;
  border-radius: 13px;
}
.chat-meta { flex: 1; min-width: 0; }
.chat-meta .chat-name { font-size: 16px; font-weight: 700; }
.chat-meta .chat-sign {
  font-size: 12px;
  color: var(--muted);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.chat-secondary-name {
  font-size: 11px;
  color: rgba(255,255,255,.45);
  margin-top: 2px;
  display: none;
}
.chat-secondary-name.show { display: block; }

.online-dot {
  display: inline-block;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--green);
  margin-right: 4px;
  vertical-align: middle;
  box-shadow: 0 0 6px rgba(110,231,183,.5);
  animation: pulse-dot 2s infinite;
}

.chat-topbar-right {
  width: 34px;
  height: 34px;
  border-radius: 10px;
  border: 1px solid rgba(255,255,255,.07);
  background: rgba(255,255,255,.04);
  display: grid;
  place-items: center;
  font-size: 18px;
  color: var(--text);
  cursor: pointer;
  flex-shrink: 0;
  user-select: none;
  transition: background .15s, transform .15s;
}
.chat-topbar-right:active {
  background: rgba(255,255,255,.08);
  transform: scale(.96);
}

/* ── 搜索按钮 ─────────────────────────────────────────────────── */
.chat-topbar-search {
  width: 34px;
  height: 34px;
  border-radius: 10px;
  border: 1px solid rgba(255,255,255,.07);
  background: rgba(255,255,255,.04);
  display: grid;
  place-items: center;
  font-size: 16px;
  cursor: pointer;
  flex-shrink: 0;
  user-select: none;
  transition: background .15s, transform .15s;
  margin-left: 6px;
}
.chat-topbar-search:active {
  background: rgba(255,255,255,.08);
  transform: scale(.96);
}

/* ── 消息列表 ──────────────────────────────────────────────── */
.chat-messages {
  flex: 1;
  overflow-y: auto;
  padding: 14px 14px 8px;
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.chat-messages::-webkit-scrollbar { width: 0; }

.msg-row {
  display: flex;
  flex-direction: row;
  align-items: flex-start;
  gap: 8px;
  margin-bottom: 12px;
  animation: msg-in .25s cubic-bezier(0.22, 1, 0.36, 1);
  will-change: opacity, transform;
}
.msg-row.ai  { justify-content: flex-start; }
.msg-row.user { justify-content: flex-end; }
.msg-row.error-row { opacity: .9; }

.msg-avatar {
  width: 36px;
  height: 36px;
  min-width: 36px;
  min-height: 36px;
  aspect-ratio: 1 / 1;
  border-radius: 10px;
  flex-shrink: 0;
  overflow: hidden;
  background: var(--bg-card-md);
  display: grid;
  place-items: center;
  font-size: 13px;
  font-weight: 700;
  color: var(--muted);
}
.msg-avatar img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center top;
}

.msg-body {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  max-width: calc(100% - 44px);
}

.msg-bubble {
  max-width: calc(100% - 40px);
  padding: 11px 14px;
  line-height: 1.75;
  font-size: 14px;
  border-radius: 18px;
  word-break: break-word;
  -webkit-user-select: text;
  user-select: text;
}
.msg-bubble.ai {
  background: var(--bg-card-md);
  border: 1px solid var(--line);
  border-top-left-radius: 6px;
}
.msg-bubble.user {
  color: #fff;
  background: linear-gradient(135deg, var(--accent-start), var(--accent-end));
  border-top-right-radius: 6px;
}
.msg-bubble p { margin: 0; }
.msg-bubble p + p { margin-top: 8px; }

.msg-bubble.typing {
  background: var(--bg-card-md);
  border: 1px solid var(--line);
  border-top-left-radius: 6px;
  padding: 13px 18px;
  display: flex;
  align-items: center;
  gap: 5px;
}
.typing-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--muted);
  animation: typing-bounce .9s infinite;
}
.typing-dot:nth-child(2) { animation-delay: .15s; }
.typing-dot:nth-child(3) { animation-delay: .30s; }

.msg-time {
  display: block;
  text-align: center;
  font-size: 11px;
  color: rgba(139,146,176,.55);
  margin: 16px 0 8px;
  padding: 0;
}

.date-divider {
  text-align: center;
  font-size: 11px;
  color: rgba(139,146,176,.45);
  padding: 6px 0 10px;
  position: relative;
}

.load-earlier-btn {
  text-align: center;
  font-size: 12px;
  color: var(--pink);
  padding: 12px 16px;
  margin: 0 16px 8px;
  cursor: pointer;
  border-radius: 12px;
  background: rgba(138,114,255,.08);
  transition: background .2s;
  user-select: none;
}
.load-earlier-btn:hover { background: rgba(138,114,255,.15); }

/* ── DOM 折叠占位 ─────────────────────────────────────────────── */
.folded-messages-spacer {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 40px;
  margin: 0 16px 8px;
}
.folded-hint {
  font-size: 11px;
  color: var(--text-muted);
  background: rgba(138,114,255,.06);
  padding: 6px 16px;
  border-radius: 20px;
  user-select: none;
}

/* ── 错误气泡 & 重试 ───────────────────────────────────────── */
.msg-bubble.error-bubble {
  background: rgba(255, 80, 80, .10);
  border: 1px solid rgba(255, 80, 80, .25);
  color: #ff8a8a;
  font-size: 13px;
  border-top-left-radius: 6px;
}
.retry-btn {
  display: inline-block;
  margin-top: 6px;
  font-size: 12px;
  padding: 3px 10px;
  border-radius: 999px;
  border: 1px solid rgba(167,139,250,.35);
  background: rgba(167,139,250,.10);
  color: var(--pink);
  cursor: pointer;
  transition: background .15s;
}
.retry-btn:hover { background: rgba(167,139,250,.18); }

/* ── Regenerate / Continue 操作按钮 ────────────────────────── */
.msg-action-btns {
  display: flex;
  gap: 6px;
  margin-top: 6px;
  opacity: 0;
  transform: translateY(4px);
  transition: all 0.2s ease;
  justify-content: flex-start;
}
.msg-row.ai:hover .msg-action-btns,
.msg-row.ai:active .msg-action-btns {
  opacity: 1;
  transform: translateY(0);
}
@media (max-width: 768px) {
  .msg-action-btns {
    opacity: 0.6;
    transform: translateY(0);
  }
  .msg-row.ai .msg-action-btns { opacity: 0.5; }
  .msg-action-btn {
    width: 32px;
    height: 32px;
    font-size: 16px;
  }
  .msg-action-btns {
    gap: 8px;
    margin-top: 8px;
  }
}
.msg-action-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  border: none;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.08);
  color: rgba(255, 255, 255, 0.6);
  font-size: 14px;
  cursor: pointer;
  transition: all 0.2s ease;
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  line-height: 1;
  padding: 0;
  flex-shrink: 0;
  position: relative;
}
.msg-action-btn:hover {
  background: rgba(255, 255, 255, 0.15);
  color: rgba(255, 255, 255, 0.9);
  transform: scale(1.1);
}
.msg-action-btn:active {
  transform: scale(0.95);
  background: rgba(255, 126, 182, 0.2);
  color: #ff7eb6;
}
.regenerate-btn {
  font-size: 20px !important;
  line-height: 0.5;
  padding-bottom: 4px;
}
.regenerate-btn:hover {
  background: rgba(138, 114, 255, 0.2);
  color: #8a72ff;
}
.continue-btn {
  font-size: 10px !important;
}
.continue-btn:hover {
  background: rgba(52, 211, 153, 0.2);
  color: #34d399;
}
.msg-action-btn.loading {
  pointer-events: none;
  color: transparent !important;
}
.msg-action-btn.loading::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  margin: auto;
  width: 14px;
  height: 14px;
  border: 2px solid var(--pink);
  border-right-color: transparent;
  border-radius: 50%;
  animation: spinBtn 0.6s linear infinite;
}

/* ── 输入区 ────────────────────────────────────────────────── */
.chat-composer {
  flex-shrink: 0;
  padding: 8px 12px calc(var(--nav-h) + var(--safe-bottom) + 2px);
  background: linear-gradient(180deg, rgba(10,14,26,0), rgba(10,14,26,.95) 30%);
  backdrop-filter: blur(10px);
  position: relative;
  z-index: 10;
}
.composer-inner {
  display: flex;
  gap: 8px;
  align-items: flex-end;
  padding: 9px 10px 9px 14px;
  border: 1px solid rgba(255,255,255,.07);
  border-radius: var(--radius-lg);
  background: rgba(255,255,255,.04);
  transition: border-color .2s;
}
.composer-inner:focus-within {
  border-color: rgba(167,139,250,.4);
  box-shadow: 0 0 0 3px rgba(167,139,250,.08);
}
.composer-input {
  flex: 1;
  color: var(--text);
  font-size: 16px;
  line-height: 1.5;
  outline: none;
  background: none;
  border: none;
  resize: none;
  min-height: 24px;
  max-height: 120px;
  font-family: inherit;
  -webkit-appearance: none;
  border-radius: 0;
  caret-color: var(--pink);
}
.composer-input::placeholder {
  color: var(--muted);
  opacity: 0.7;
}
.send-btn {
  width: 38px;
  height: 38px;
  border-radius: 12px;
  border: none;
  background: linear-gradient(135deg, var(--accent-start), var(--accent-end));
  color: #fff;
  font-size: 16px;
  cursor: pointer;
  flex-shrink: 0;
  display: grid;
  place-items: center;
  transition: opacity .15s, transform .1s;
  position: relative;
  overflow: hidden;
}
.send-btn:active:not(:disabled) { opacity: .75; transform: scale(.93); }
.send-btn:disabled {
  opacity: .6;
  cursor: not-allowed;
  background: linear-gradient(135deg, var(--accent-start), var(--accent-end));
}
.send-btn.loading .send-icon { display: none; }
.send-btn.loading::after {
  content: '';
  width: 18px;
  height: 18px;
  border: 2px solid rgba(255,255,255,.3);
  border-top-color: #fff;
  border-radius: 50%;
  animation: spin .7s linear infinite;
}
/* ── 聊天菜单（右上角 ···）─────────────────────────────────── */
.wechat-menu-overlay {
  position: fixed;
  inset: 0;
  z-index: 160;
  background: transparent;
  opacity: 0;
  pointer-events: none;
  transition: opacity .16s;
}
.wechat-menu-overlay.open {
  opacity: 1;
  pointer-events: all;
}
.wechat-menu {
  position: absolute;
  top: calc(env(safe-area-inset-top, 0px) + 66px);
  right: 16px;
  width: 204px;
  background: rgba(16,20,36,.97);
  border: 1px solid rgba(255,255,255,.07);
  box-shadow: 0 18px 48px rgba(0,0,0,.36);
  border-radius: 16px;
  backdrop-filter: blur(16px);
  overflow: hidden;
  transform: translateY(-6px) scale(.98);
  transition: transform .18s ease, opacity .18s ease;
  opacity: 0;
}
.wechat-menu-overlay.open .wechat-menu {
  transform: translateY(0) scale(1);
  opacity: 1;
}
.wechat-menu::before {
  content: "";
  position: absolute;
  top: -6px;
  right: 14px;
  width: 12px;
  height: 12px;
  background: rgba(16,20,36,.97);
  border-top: 1px solid rgba(255,255,255,.07);
  border-left: 1px solid rgba(255,255,255,.07);
  transform: rotate(45deg);
}
.wechat-menu-group { padding: 6px 0; }
.wechat-menu-group + .wechat-menu-group {
  border-top: 1px solid rgba(255,255,255,.05);
}
.wechat-menu-item {
  display: flex;
  align-items: center;
  gap: 10px;
  width: 100%;
  background: transparent;
  border: none;
  color: var(--text);
  text-align: left;
  padding: 13px 14px;
  font-size: 14px;
  cursor: pointer;
  transition: background .15s;
}
.wechat-menu-item:active { background: rgba(255,255,255,.05); }
.wechat-menu-item.danger { color: #ff8d8d; }
.wechat-menu-icon {
  width: 18px;
  text-align: center;
  flex-shrink: 0;
  opacity: .92;
}

/* ── 聊天记录弹窗 ──────────────────────────────────────────── */
.history-sheet { padding-bottom: 20px; }
.history-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
  max-height: 52vh;
  overflow-y: auto;
  margin-top: 4px;
}
.history-empty {
  font-size: 13px;
  color: var(--muted);
  line-height: 1.7;
  padding: 16px 0 6px;
}
.history-card {
  background: rgba(255,255,255,.04);
  border: 1px solid rgba(255,255,255,.05);
  border-radius: 16px;
  padding: 12px 14px;
}
.history-role {
  font-size: 12px;
  color: var(--pink);
  margin-bottom: 6px;
  font-weight: 600;
}
.history-role.user { color: var(--green); }
.history-content {
  font-size: 14px;
  line-height: 1.7;
  color: var(--text);
  white-space: pre-wrap;
  word-break: break-word;
}
.history-time {
  margin-top: 8px;
  font-size: 11px;
  color: var(--muted);
}

/* ── 游客试用栏 ────────────────────────────────────────────── */
.guest-trial-bar {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 16px;
  background: rgba(129,140,248,.10);
  border-bottom: 1px solid rgba(129,140,248,.16);
  font-size: 12px;
  color: rgba(255,255,255,.7);
}
.guest-trial-bar .trial-copy {
  display: flex;
  flex-direction: column;
  gap: 2px;
  min-width: 88px;
}
.guest-trial-bar .trial-label { font-size: 11px; color: rgba(255,255,255,.58); }
.guest-trial-bar .trial-status { font-weight: 600; color: var(--purple); }
.guest-trial-bar .trial-status.ok { color: var(--purple); }
.guest-trial-bar .trial-status.warning { color: var(--gold); }
.guest-trial-bar .trial-status.exhausted { color: #ff9a9a; }
.guest-trial-bar .trial-meter {
  flex: 1;
  min-width: 72px;
  height: 6px;
  border-radius: 999px;
  overflow: hidden;
  background: rgba(255,255,255,.10);
}
.guest-trial-bar .trial-meter span {
  display: block;
  height: 100%;
  border-radius: inherit;
  background: linear-gradient(90deg, var(--purple), var(--pink));
  transition: width .25s ease;
}
.guest-trial-bar .trial-login-btn {
  font-size: 12px;
  color: var(--purple);
  background: rgba(129,140,248,.15);
  border: 1px solid rgba(129,140,248,.25);
  border-radius: 999px;
  padding: 3px 12px;
  cursor: pointer;
  flex-shrink: 0;
}

/* ── Toast 提示 ────────────────────────────────────────────── */
.copy-toast {
  position: fixed;
  bottom: calc(var(--nav-h) + var(--safe-bottom) + 20px);
  left: 50%;
  transform: translateX(-50%) translateY(10px);
  background: rgba(16,20,36,.92);
  color: var(--text);
  font-size: 13px;
  padding: 8px 18px;
  border-radius: 999px;
  border: 1px solid rgba(255,255,255,.08);
  backdrop-filter: blur(10px);
  z-index: 200;
  opacity: 0;
  transition: opacity .2s, transform .2s;
  pointer-events: none;
  white-space: nowrap;
}
.copy-toast.show {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}
.ui-toast {
  position: fixed;
  bottom: calc(var(--nav-h) + var(--safe-bottom) + 16px);
  left: 50%;
  transform: translateX(-50%) translateY(10px);
  background: rgba(16,20,36,.95);
  color: var(--text);
  font-size: 14px;
  padding: 10px 20px;
  border-radius: 12px;
  border: 1px solid rgba(255,255,255,.10);
  backdrop-filter: blur(12px);
  z-index: 210;
  opacity: 0;
  transition: opacity .22s ease, transform .22s ease;
  pointer-events: none;
  white-space: nowrap;
  max-width: min(320px, 90vw);
  text-align: center;
}
.ui-toast.show {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}
.ui-toast.success { border-color: rgba(52,211,153,.30); }
.ui-toast.error   { border-color: rgba(255,100,100,.30); color: #ff9090; }
.ui-toast.warn    { border-color: rgba(251,191,36,.30);  color: #fcd34d; }

/* ── 确认弹窗内容 ──────────────────────────────────────────── */
.confirm-sheet { padding: 24px 20px 20px; }
.confirm-title {
  font-size: 16px;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 10px;
  line-height: 1.4;
}
.confirm-body {
  font-size: 14px;
  color: var(--muted);
  line-height: 1.6;
  margin-bottom: 20px;
  white-space: pre-wrap;
}

/* ── 多行文本输入 ──────────────────────────────────────────── */
.textarea-field {
  min-height: 92px;
  resize: none;
  line-height: 1.6;
}