/* ── 浅色主题（默认）── */
:root,
html[data-theme="light"] {
  --bg: #f6f8fa;
  --sidebar-bg: #ffffff;
  --main-bg: #f6f8fa;
  --border: #d0d7de;
  --text: #1f2328;
  --muted: #656d76;
  --accent: #0969da;
  --danger: #cf222e;
  --user-bg: #ddf4ff;
  --user-bubble-border: rgba(9, 105, 218, 0.18);
  --input-bg: #ffffff;
  --thread-width: 48rem;
  --sidebar-width: 260px;
  --topbar-height: 64px;

  --header-bg: rgba(246, 248, 250, 0.92);
  --row-border: rgba(208, 215, 222, 0.9);
  --assistant-row-bg: rgba(0, 0, 0, 0.02);
  --hover-bg: rgba(0, 0, 0, 0.04);
  --hover-accent-bg: rgba(9, 105, 218, 0.08);
  --active-session-bg: rgba(9, 105, 218, 0.12);
  --avatar-assistant-bg: #dbeafe;
  --avatar-assistant-color: #1e40af;
  --avatar-assistant-border: rgba(9, 105, 218, 0.25);
  --input-shadow: 0 4px 24px rgba(0, 0, 0, 0.06);
  --error-bg: rgba(207, 34, 46, 0.08);
  --error-text: #a40e26;
  --toast-bg: rgba(255, 255, 255, 0.96);
  --toast-shadow: 0 8px 32px rgba(0, 0, 0, 0.12);
  --md-heading: #1f2328;
  --md-strong: #1f2328;
  --md-em: #424a53;
  --md-link: #0969da;
  --md-blockquote-bg: rgba(9, 105, 218, 0.06);
  --md-blockquote-border: rgba(9, 105, 218, 0.35);
  --md-code-bg: rgba(175, 184, 193, 0.25);
  --md-code-border: rgba(9, 105, 218, 0.15);
  --md-pre-bg: #f6f8fa;
  --md-pre-border: rgba(208, 215, 222, 0.9);
  --md-hr: rgba(208, 215, 222, 0.9);
  --md-th-bg: rgba(9, 105, 218, 0.08);
  --md-table-border: rgba(208, 215, 222, 0.9);
  --code-copy-bg: rgba(255, 255, 255, 0.95);
  --stream-accent: #0969da;
  --tag-bg: rgba(9, 105, 218, 0.1);
  --tag-color: #0550ae;
  --tag-border: rgba(9, 105, 218, 0.25);
  --vision-card-bg: #f0f6ff;
  --vision-card-border: rgba(9, 105, 218, 0.22);
  --vision-title: #0550ae;
  --vision-summary: #424a53;
  --vision-kb: #116329;
  --vision-tag-bg: rgba(9, 105, 218, 0.1);
  --vision-tag-border: rgba(9, 105, 218, 0.2);
  --delete-hover-bg: rgba(207, 34, 46, 0.1);
  --delete-hover-color: #cf222e;
  --preview-remove-bg: rgba(31, 35, 40, 0.55);
}

/* ── 深色主题（原样式）── */
html[data-theme="dark"] {
  --bg: #0d1117;
  --sidebar-bg: #0a0e14;
  --main-bg: #0d1117;
  --border: #2a3548;
  --text: #e6edf3;
  --muted: #8b9cb3;
  --accent: #5e8fff;
  --danger: #ff5d75;
  --user-bg: #1a2a4a;
  --user-bubble-border: rgba(94, 143, 255, 0.22);
  --input-bg: #161b26;

  --header-bg: rgba(13, 17, 23, 0.92);
  --row-border: rgba(42, 53, 72, 0.45);
  --assistant-row-bg: rgba(255, 255, 255, 0.015);
  --hover-bg: rgba(255, 255, 255, 0.06);
  --hover-accent-bg: rgba(94, 143, 255, 0.1);
  --active-session-bg: rgba(94, 143, 255, 0.18);
  --avatar-assistant-bg: #1e3a5f;
  --avatar-assistant-color: #9ec0ff;
  --avatar-assistant-border: rgba(94, 143, 255, 0.35);
  --input-shadow: 0 4px 24px rgba(0, 0, 0, 0.25);
  --error-bg: rgba(255, 93, 117, 0.13);
  --error-text: #ffb9c5;
  --toast-bg: rgba(12, 20, 38, 0.94);
  --toast-shadow: 0 8px 32px rgba(0, 0, 0, 0.4);
  --md-heading: #e8f0ff;
  --md-strong: #f0f6ff;
  --md-em: #c8d8f5;
  --md-link: #8eb8ff;
  --md-blockquote-bg: rgba(20, 32, 58, 0.35);
  --md-blockquote-border: rgba(94, 143, 255, 0.55);
  --md-code-bg: rgba(8, 14, 28, 0.65);
  --md-code-border: rgba(94, 143, 255, 0.2);
  --md-pre-bg: rgba(6, 10, 20, 0.75);
  --md-pre-border: rgba(94, 143, 255, 0.22);
  --md-hr: rgba(94, 143, 255, 0.25);
  --md-th-bg: rgba(30, 48, 86, 0.55);
  --md-table-border: rgba(94, 143, 255, 0.25);
  --code-copy-bg: rgba(18, 31, 54, 0.9);
  --stream-accent: #9fc2ff;
  --tag-bg: rgba(31, 111, 235, 0.22);
  --tag-color: #9fc2ff;
  --tag-border: rgba(110, 146, 226, 0.4);
  --vision-card-bg: rgba(30, 48, 86, 0.45);
  --vision-card-border: rgba(94, 143, 255, 0.35);
  --vision-title: #9ec0ff;
  --vision-summary: #d8e4fb;
  --vision-kb: #b8f0c8;
  --vision-tag-bg: rgba(94, 143, 255, 0.18);
  --vision-tag-border: rgba(94, 143, 255, 0.28);
  --delete-hover-bg: rgba(255, 93, 117, 0.2);
  --delete-hover-color: #ff8a9a;
  --preview-remove-bg: rgba(0, 0, 0, 0.65);
}
html[data-theme="light"] { color-scheme: light; }
html[data-theme="dark"] { color-scheme: dark; }

* { box-sizing: border-box; margin: 0; padding: 0; }

html, body {
  height: 100%;
  overflow: hidden;
}

body {
  font-family: "Segoe UI", "PingFang SC", "Microsoft YaHei", system-ui, sans-serif;
  background: var(--main-bg);
  color: var(--text);
  line-height: 1.55;
}

#app, .app-shell {
  height: 100vh;
  display: flex;
  overflow: hidden;
}

.hint { font-size: 0.8rem; color: var(--muted); }
.file-input-hidden { display: none; }

/* ── 侧边栏 ── */
.sidebar {
  width: var(--sidebar-width);
  flex-shrink: 0;
  display: flex;
  flex-direction: column;
  background: var(--sidebar-bg);
  border-right: 1px solid var(--border);
  height: 100vh;
}

.sidebar-top {
  height: var(--topbar-height);
  padding: 0 12px;
  display: flex;
  align-items: center;
  border-bottom: 1px solid var(--border);
}

.sidebar-brand-logo {
  width: 176px;
  height: 42px;
  overflow: hidden;
}

.sidebar-brand-logo svg {
  display: block;
  width: 100%;
  height: 100%;
}

/* 手机抽屉关闭钮 / 顶栏菜单 / 遮罩：默认桌面不显示 */
.sidebar-drawer-close,
.sidebar-menu-btn,
.sidebar-backdrop {
  display: none;
}

.sidebar-new-btn {
  width: fit-content;
  display: flex;
  align-items: center;
  gap: 7px;
  margin: 10px 8px 2px;
  padding: 7px 8px;
  border: 0;
  border-radius: 7px;
  background: transparent;
  color: var(--text);
  font-size: 0.88rem;
  cursor: pointer;
  transition: background 0.15s;
}
.sidebar-new-btn:hover:not(:disabled) { background: var(--hover-accent-bg); }
.sidebar-new-btn:disabled { opacity: 0.5; cursor: not-allowed; }
.sidebar-section-label {
  padding: 12px 16px 6px;
  font-size: 0.72rem;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.sidebar-sessions {
  flex: 1;
  overflow-y: auto;
  scrollbar-gutter: stable;
  padding: 0 8px;
}

.sidebar-hint {
  padding: 12px 8px;
  font-size: 0.82rem;
  color: var(--muted);
}

.session-list { list-style: none; }

.session-item {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 9px 10px;
  border-radius: 8px;
  cursor: pointer;
  margin-bottom: 2px;
  transition: background 0.12s;
}
.session-item:hover { background: var(--hover-bg); }
.session-item.active { background: var(--active-session-bg); }

.session-item-title {
  flex: 1;
  min-width: 0;
  font-size: 0.84rem;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.session-item-rename {
  flex: 1;
  min-width: 0;
  height: 26px;
  padding: 0 6px;
  border: 1px solid var(--accent);
  border-radius: 6px;
  background: var(--input-bg);
  color: var(--text);
  font-size: 0.82rem;
}

.session-item-actions {
  position: relative;
  display: flex;
  flex-shrink: 0;
  align-items: center;
  gap: 2px;
  opacity: 0.7;
}

.session-item:hover .session-item-actions,
.session-item.active .session-item-actions {
  opacity: 1;
}

.session-item-spinner,
.session-item-unread {
  flex-shrink: 0;
  width: 8px;
  height: 8px;
  border-radius: 50%;
}

.session-item-spinner {
  border: 1.5px solid var(--accent);
  border-top-color: transparent;
  animation: session-spin 0.7s linear infinite;
}

.session-item-unread {
  background: #e24c32;
  box-shadow: 0 0 8px 2px rgba(226, 76, 50, 0.65);
}

@keyframes session-spin {
  to { transform: rotate(360deg); }
}

.session-item-rename-btn,
.session-item-delete,
.session-item-more {
  flex-shrink: 0;
  height: 22px;
  padding: 0 6px;
  border: none;
  border-radius: 4px;
  background: transparent;
  color: var(--muted);
  cursor: pointer;
  font-size: 0.72rem;
  line-height: 22px;
}

.session-item-more {
  width: 22px;
  padding: 0;
  font-size: 1.05rem;
  line-height: 22px;
  letter-spacing: 0;
}

.session-item-rename-btn:hover:not(:disabled),
.session-item-delete:hover:not(:disabled),
.session-item-more:hover:not(:disabled) {
  background: var(--delete-hover-bg);
  color: var(--delete-hover-color);
}

.session-item-menu-pop {
  position: fixed;
  z-index: 80;
  min-width: 104px;
  padding: 4px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--sidebar-bg);
  box-shadow: 0 8px 24px rgba(15, 23, 42, 0.16);
  display: flex;
  flex-direction: column;
}

.session-item-menu-pop .session-item-rename-btn,
.session-item-menu-pop .session-item-delete {
  width: 100%;
  height: 28px;
  padding: 0 8px;
  text-align: left;
  font-size: 0.78rem;
}

@media (hover: none) {
  .session-item-actions { opacity: 1; }
}

.sidebar-bottom {
  padding: 12px;
  border-top: 1px solid var(--border);
}

.sidebar-export-btn {
  width: 100%;
  padding: 9px 12px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: transparent;
  color: var(--muted);
  font-size: 0.82rem;
  cursor: pointer;
}
.sidebar-export-btn:hover:not(:disabled) {
  color: var(--text);
  border-color: var(--accent);
}
.sidebar-export-btn:disabled { opacity: 0.45; cursor: not-allowed; }

/* ── 主聊天区 ── */
.chat-main {
  flex: 1;
  min-width: 0;
  display: flex;
  flex-direction: column;
  height: 100vh;
  background: var(--main-bg);
}

.chat-header {
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: nowrap;
  height: var(--topbar-height);
  min-height: var(--topbar-height);
  padding: 0 20px;
  border-bottom: 1px solid var(--border);
  background: var(--header-bg);
}

.chat-header-left {
  display: flex;
  align-items: center;
  gap: 10px;
  min-width: 0;
}

.chat-header-actions {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-shrink: 0;
  flex-wrap: nowrap;
  justify-content: flex-end;
  min-height: 36px;
}

.current-account {
  display: inline-block;
  min-width: 4.5em;
  min-height: 1.2em;
  max-width: 140px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  color: var(--muted);
  font-size: 0.78rem;
  font-weight: 600;
}

.header-text-btn {
  padding: 6px 9px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: transparent;
  color: var(--muted);
  font: inherit;
  font-size: 0.76rem;
  text-decoration: none;
  cursor: pointer;
}

.header-text-btn:hover,
.header-text-btn:focus-visible {
  color: var(--accent);
  border-color: var(--accent);
  outline: none;
}

.llm-provider-switch {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin: 0;
  font-size: 0.78rem;
  color: var(--muted);
}

.llm-provider-label {
  line-height: 1;
  white-space: nowrap;
}

.llm-provider-select {
  max-width: 11rem;
  padding: 5px 8px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: transparent;
  color: var(--text);
  font-size: 0.78rem;
  cursor: pointer;
}

.llm-provider-select:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

.theme-toggle-btn {
  flex-shrink: 0;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 10px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: transparent;
  color: var(--muted);
  font-size: 0.78rem;
  cursor: pointer;
  transition: background 0.12s, color 0.12s, border-color 0.12s;
}
.theme-toggle-btn:hover {
  background: var(--hover-bg);
  color: var(--text);
  border-color: var(--accent);
}
.theme-toggle-label { line-height: 1; }

.chat-header-title { font-size: 0.95rem; font-weight: 600; }
.chat-header-sub { font-size: 0.78rem; color: var(--muted); }

.chat-scroll {
  flex: 1;
  overflow-y: scroll;
  scrollbar-gutter: stable;
  overflow-anchor: none;
}

.chat-thread {
  max-width: var(--thread-width);
  margin: 0 auto;
  padding: 28px 20px 40px;
}

.chat-welcome {
  text-align: center;
  padding: 56px 20px 40px;
  color: var(--muted);
}
.chat-welcome h2 {
  font-size: 1.6rem;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 8px;
}
.chat-welcome-sub {
  font-size: 0.92rem;
  margin-bottom: 24px;
}

/* 首次访问轻引导 */
.welcome-onboarding {
  max-width: 420px;
  margin: 0 auto 28px;
  padding: 16px 18px;
  text-align: left;
  border-radius: 14px;
  border: 1px solid var(--accent);
  background: color-mix(in srgb, var(--accent) 8%, var(--input-bg));
}
.welcome-onboarding-title {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text);
  margin: 0 0 10px;
}
.welcome-onboarding-list {
  margin: 0 0 12px;
  padding-left: 1.2em;
  font-size: 0.88rem;
  line-height: 1.55;
  color: var(--muted);
}
.welcome-onboarding-list li { margin-bottom: 6px; }
.welcome-onboarding-list strong { color: var(--text); font-weight: 600; }
.welcome-link-btn {
  border: none;
  background: none;
  padding: 0;
  color: var(--accent);
  font-size: inherit;
  font-weight: 600;
  cursor: pointer;
  text-decoration: underline;
  text-underline-offset: 2px;
}
.welcome-onboarding-dismiss {
  display: inline-block;
  padding: 6px 14px;
  border: none;
  border-radius: 8px;
  background: var(--accent);
  color: #fff;
  font-size: 0.85rem;
  cursor: pointer;
}
.welcome-onboarding-dismiss:hover { opacity: 0.9; }

/* 快捷提问芯片 */
.welcome-chips {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 10px;
  max-width: 560px;
  margin: 0 auto;
}
.welcome-chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 10px 16px;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: var(--input-bg);
  color: var(--text);
  font-size: 0.88rem;
  cursor: pointer;
  transition: border-color 0.12s, background 0.12s;
  box-shadow: var(--input-shadow);
}
.welcome-chip:hover:not(:disabled) {
  border-color: var(--accent);
  background: color-mix(in srgb, var(--accent) 6%, var(--input-bg));
}
.welcome-chip:disabled { opacity: 0.5; cursor: not-allowed; }
.welcome-chip-icon { font-size: 1rem; line-height: 1; }

.chat-welcome p { font-size: 0.92rem; }

/* ── 消息行：用户右侧气泡 / 助手左侧 ── */
.message-row {
  display: flex;
  padding: 10px 0;
}
.message-row:last-child { border-bottom: none; }

/* 用户提问：靠右气泡，无头像 */
.message-row.user {
  justify-content: flex-end;
  background: transparent;
  padding-bottom: 2px;
}
.message-row.user .message-inner {
  max-width: min(88%, 34rem);
  margin-left: auto;
}
.message-row.user .message-content {
  background: var(--user-bg);
  border: 1px solid var(--user-bubble-border);
  border-radius: 16px 16px 4px 16px;
  padding: 8px 14px;
  line-height: 1.45;
}
.message-row.user .message-img-grid {
  justify-content: flex-end;
}
.message-row.user .message-body {
  flex: 0 1 auto;
  max-width: 100%;
}
.message-row.user .message-actions {
  justify-content: flex-end;
}

/* Agent 回答：靠左，全宽内容列 */
.message-row.assistant {
  justify-content: flex-start;
  background: var(--assistant-row-bg);
  border-bottom: 1px solid var(--row-border);
  padding: 16px 0;
}
.message-row.assistant .message-inner {
  width: 100%;
}
.message-row.is-failed .message-content { border-left: 3px solid var(--danger); padding-left: 12px; }
.message-row.user.is-failed .message-content {
  border-left: none;
  border-right: 3px solid var(--danger);
  padding-left: 14px;
  padding-right: 12px;
}

.message-inner {
  display: flex;
  align-items: flex-start;
}

.message-body {
  flex: 1;
  min-width: 0;
  position: relative;
}

.message-content {
  flex: 1;
  min-width: 0;
  position: relative;
}

.message-text { word-break: break-word; }
.message-text.user-text {
  white-space: pre-line;
  font-size: 0.95rem;
}
.message-img {
  display: block;
  max-width: 280px;
  max-height: 280px;
  border-radius: 10px;
  margin-bottom: 10px;
}
.message-img-clickable {
  cursor: zoom-in;
  transition: opacity 0.15s;
}
.message-img-clickable:hover {
  opacity: 0.92;
}
/* 多图气泡：自适应换行排列 */
.message-img-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 10px;
}
.message-img-grid .message-img {
  max-width: 160px;
  max-height: 160px;
  margin-bottom: 0;
}

/* 助手操作栏常驻一排：点赞、点踩、复制、重试。意见框绝对定位，不撑开后续消息。 */
.message-toolbar {
  position: relative;
  margin-top: 8px;
  min-height: 30px;
  z-index: 2;
  isolation: isolate;
}
.message-actions {
  display: flex;
  gap: 4px;
  min-height: 30px;
}
.message-actions.is-hidden {
  visibility: hidden;
  pointer-events: none;
}

.action-icon-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  width: 30px;
  height: 30px;
  overflow: hidden;
  border: none;
  border-radius: 8px;
  background: transparent;
  color: var(--muted);
  cursor: pointer;
  transition: background 0.12s, color 0.12s;
}
.action-icon-btn svg {
  display: block;
  width: 16px;
  height: 16px;
  flex-shrink: 0;
  overflow: visible;
  pointer-events: none;
}
.action-icon-btn:hover:not(:disabled) {
  background: var(--hover-bg);
  color: var(--text);
}
.action-icon-btn:disabled { opacity: 0.4; cursor: not-allowed; }
.action-icon-btn.is-slot-hidden {
  visibility: hidden;
  pointer-events: none;
}
.action-retry { color: var(--delete-hover-color); }
.action-icon-btn.is-up-on {
  color: #16a34a;
}
.action-icon-btn.is-down-on {
  color: #dc2626;
}
.action-icon-btn.is-up-on svg,
.action-icon-btn.is-down-on svg {
  fill: currentColor;
}

.message-feedback-box {
  position: absolute;
  left: 0;
  right: auto;
  bottom: calc(100% + 6px);
  z-index: 8;
  width: min(36rem, 100%);
  margin: 0;
  padding: 10px 12px;
  border: 1px solid var(--row-border);
  border-radius: 10px;
  background: var(--input-bg);
  box-shadow: var(--toast-shadow);
  overflow-anchor: none;
}
.message-feedback-lead {
  margin: 0 0 8px;
  font-size: 0.84rem;
  line-height: 1.5;
  color: var(--muted);
}
.message-feedback-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin: 0 0 8px;
}
.message-feedback-tag {
  padding: 4px 10px;
  border: 1px solid var(--tag-border);
  border-radius: 999px;
  background: transparent;
  color: var(--tag-color);
  font: inherit;
  font-size: 0.78rem;
  line-height: 1.4;
  cursor: pointer;
}
.message-feedback-tag:hover {
  background: var(--hover-accent-bg);
}
.message-feedback-tag.is-on {
  border-color: var(--accent);
  background: var(--hover-accent-bg);
  color: var(--accent);
  font-weight: 600;
}
.message-feedback-input {
  display: block;
  width: 100%;
  box-sizing: border-box;
  min-height: 4.5rem;
  padding: 8px 10px;
  border: 1px solid var(--row-border);
  border-radius: 8px;
  background: var(--input-bg);
  color: var(--text);
  font: inherit;
  font-size: 0.88rem;
  line-height: 1.45;
  resize: vertical;
}
.message-feedback-input:focus {
  outline: none;
  border-color: var(--accent);
}
.message-feedback-collapse {
  margin-top: 8px;
  border: none;
  background: none;
  padding: 0;
  color: var(--accent);
  font: inherit;
  font-size: 0.82rem;
  cursor: pointer;
}
.message-feedback-collapse:hover {
  text-decoration: underline;
}

.user-edit-panel {
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.user-edit-input {
  display: block;
  width: 100%;
  box-sizing: border-box;
  min-height: 4.5rem;
  padding: 0;
  border: none;
  background: transparent;
  color: inherit;
  font: inherit;
  font-size: 0.95rem;
  line-height: 1.45;
  resize: vertical;
}
.user-edit-input:focus {
  outline: none;
}
.user-edit-bar {
  display: flex;
  justify-content: flex-end;
  gap: 8px;
}
.user-edit-cancel,
.user-edit-send {
  border-radius: 8px;
  font: inherit;
  font-size: 0.82rem;
  padding: 4px 12px;
  cursor: pointer;
}
.user-edit-cancel {
  border: 1px solid var(--border);
  background: transparent;
  color: var(--muted);
}
.user-edit-send {
  border: none;
  background: var(--accent);
  color: #fff;
}
.user-edit-send:disabled,
.user-edit-cancel:disabled {
  opacity: 0.45;
  cursor: not-allowed;
}

.user-edit-slot {
  display: flex;
  justify-content: flex-end;
  align-items: center;
  min-height: 28px;
  margin-top: 4px;
}
.user-edit-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 26px;
  height: 26px;
  padding: 0;
  border: none;
  border-radius: 6px;
  background: transparent;
  color: var(--muted);
  cursor: pointer;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.15s, color 0.12s, background 0.12s;
}
.message-row.user:hover .user-edit-btn {
  opacity: 1;
  pointer-events: auto;
}
.user-edit-btn:hover {
  background: var(--hover-bg);
  color: var(--text);
}

/* ── 底部输入区 ── */
.chat-footer {
  position: relative;
  flex-shrink: 0;
  padding: 12px 20px 18px;
  background: linear-gradient(180deg, transparent 0%, var(--main-bg) 30%);
}
.chat-input-wrap {
  max-width: var(--thread-width);
  margin: 0 auto;
}

.chat-input-box {
  display: flex;
  align-items: flex-end;
  gap: 8px;
  padding: 10px 12px;
  border: 1px solid var(--border);
  border-radius: 24px;
  background: var(--input-bg);
  box-shadow: var(--input-shadow);
}

.input-attach-btn {
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  color: var(--muted);
  cursor: pointer;
  transition: background 0.12s, color 0.12s;
}
.input-attach-btn:hover { background: var(--hover-bg); color: var(--text); }

.input-web-search-btn {
  position: relative;
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border: none;
  border-radius: 50%;
  background: transparent;
  color: var(--muted);
  cursor: pointer;
  transition: background 0.12s, color 0.12s;
}
.input-web-search-btn:hover,
.input-web-search-btn:focus-visible {
  background: var(--hover-bg);
  color: var(--text);
  outline: none;
}
.input-web-search-btn.is-on {
  color: var(--accent);
  background: var(--hover-bg);
}
.input-web-search-tip {
  position: absolute;
  left: 0;
  bottom: calc(100% + 8px);
  z-index: 20;
  display: none;
  width: max-content;
  max-width: 12.5rem;
  padding: 6px 8px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--header-bg);
  color: var(--text);
  font-size: 0.72rem;
  line-height: 1.35;
  box-shadow: var(--toast-shadow);
  pointer-events: none;
  white-space: normal;
}
.input-web-search-btn:hover .input-web-search-tip,
.input-web-search-btn:focus-visible .input-web-search-tip {
  display: block;
}

.chat-textarea {
  flex: 1;
  min-height: 24px;
  max-height: 240px;
  padding: 6px 4px;
  border: none;
  background: transparent;
  color: var(--text);
  font-size: 0.95rem;
  font-family: inherit;
  line-height: 1.5;
  resize: none;
  outline: none;
  overflow-y: auto;
}

.input-send-btn,
.input-stop-btn {
  grid-area: send;
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border: none;
  border-radius: 50%;
  cursor: pointer;
  transition: opacity 0.12s, background 0.12s;
}
.input-send-btn {
  background: var(--accent);
  color: #fff;
}
.input-send-btn:hover:not(:disabled) { opacity: 0.92; }
.input-send-btn:disabled { opacity: 0.35; cursor: not-allowed; }
.input-stop-btn {
  background: var(--danger);
  color: #fff;
}

/* 底部输入区按钮组：发送/停止占同一格，避免切换时撑开输入栏 */
.chat-input-actions {
  flex-shrink: 0;
  display: grid;
  grid-template-areas: "send";
  align-items: center;
  width: 36px;
  height: 36px;
}

.chat-disclaimer {
  text-align: center;
  font-size: 0.72rem;
  color: var(--muted);
  margin-top: 10px;
}

/* 全局错误条：顶栏下方居中，宽屏/手机同一位置，不贴在输入区左侧 */
.chat-error-banner {
  position: fixed;
  top: calc(var(--topbar-height) + 10px);
  left: 50%;
  z-index: 2000;
  width: min(calc(100vw - 24px), 36rem);
  max-height: min(40vh, 12rem);
  overflow-y: auto;
  padding: 10px 14px;
  border-radius: 12px;
  background: var(--error-bg);
  border: 1px solid var(--danger);
  color: var(--error-text);
  font-size: 0.85rem;
  line-height: 1.45;
  white-space: pre-wrap;
  box-shadow: var(--toast-shadow);
  transform: translateX(-50%);
  pointer-events: auto;
}

.fishing-msg-error {
  margin-top: 8px;
  font-size: 0.82rem;
  color: var(--error-text);
}

.fishing-toast {
  position: fixed;
  left: 50%;
  bottom: 28px;
  transform: translateX(-50%) translateY(12px);
  padding: 8px 16px;
  border-radius: 999px;
  background: var(--toast-bg);
  border: 1px solid var(--border);
  color: var(--text);
  font-size: 0.82rem;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.2s ease, transform 0.2s ease;
  z-index: 9999;
  box-shadow: var(--toast-shadow);
}
.fishing-toast.show {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}

/* ── Markdown ── */
.fishing-markdown .fishing-markdown-body {
  line-height: 1.65;
  font-size: 0.95rem;
  resize: none;
}
.fishing-markdown .fishing-markdown-body > :first-child { margin-top: 0; }
.fishing-markdown .fishing-markdown-body > :last-child { margin-bottom: 0; }
.fishing-markdown h1, .fishing-markdown h2, .fishing-markdown h3, .fishing-markdown h4 {
  margin: 0.85em 0 0.45em;
  font-weight: 700;
  color: var(--md-heading);
}
.fishing-markdown h1 { font-size: 1.2em; }
.fishing-markdown h2 { font-size: 1.1em; }
.fishing-markdown h3 { font-size: 1.05em; }
.fishing-markdown p { margin: 0.5em 0; }
.fishing-markdown ul, .fishing-markdown ol { margin: 0.45em 0; padding-left: 1.4em; }
.fishing-markdown li { margin: 0.25em 0; }
.fishing-markdown strong { color: var(--md-strong); font-weight: 600; }
.fishing-markdown em { color: var(--md-em); }
.fishing-markdown a { color: var(--md-link); text-decoration: underline; text-underline-offset: 2px; }
.fishing-markdown blockquote {
  margin: 0.55em 0;
  padding: 0.4em 0.9em;
  border-left: 3px solid var(--md-blockquote-border);
  color: var(--muted);
  background: var(--md-blockquote-bg);
  border-radius: 0 8px 8px 0;
}
.fishing-markdown code {
  font-family: ui-monospace, "Cascadia Code", Consolas, monospace;
  font-size: 0.88em;
  background: var(--md-code-bg);
  padding: 0.12em 0.38em;
  border-radius: 5px;
  border: 1px solid var(--md-code-border);
}
.fishing-markdown pre,
.fishing-markdown-body pre {
  position: relative;
  margin: 0.6em 0;
  padding: 12px 14px;
  overflow-x: auto;
  border-radius: 10px;
  background: var(--md-pre-bg);
  border: 1px solid var(--md-pre-border);
}
.fishing-markdown pre code { padding: 0; border: none; background: transparent; font-size: 0.85em; }
.fishing-markdown hr { margin: 0.8em 0; border: none; border-top: 1px solid var(--md-hr); }
.fishing-markdown table { width: 100%; margin: 0.55em 0; border-collapse: collapse; font-size: 0.9em; }
.fishing-markdown th, .fishing-markdown td {
  border: 1px solid var(--md-table-border);
  padding: 6px 8px;
  text-align: left;
}
.fishing-markdown th { background: var(--md-th-bg); }

.code-copy-btn {
  position: absolute;
  top: 8px;
  right: 8px;
  padding: 3px 8px;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: var(--code-copy-bg);
  color: var(--muted);
  font-size: 0.68rem;
  cursor: pointer;
}
.code-copy-btn:hover { color: var(--text); border-color: var(--accent); }

.fishing-stream-status {
  min-height: 1.35em;
  font-size: 0.82rem;
  color: var(--stream-accent);
  margin-bottom: 6px;
  font-style: italic;
}
.fishing-cursor {
  display: inline-block;
  color: var(--stream-accent);
  animation: fishing-blink 1s step-end infinite;
}
@keyframes fishing-blink { 50% { opacity: 0; } }

.fishing-msg-meta { margin-top: 10px; display: flex; gap: 10px; flex-wrap: wrap; }
.fishing-tag {
  font-size: 0.72rem;
  padding: 2px 9px;
  border-radius: 10px;
  background: var(--tag-bg);
  color: var(--tag-color);
  border: 1px solid var(--tag-border);
}

/* ── 识图卡片 ── */
.fishing-vision-card {
  margin-bottom: 12px;
  padding: 12px 14px;
  border-radius: 10px;
  border: 1px solid var(--vision-card-border);
  background: var(--vision-card-bg);
  font-size: 0.86rem;
}
.fishing-vision-title {
  font-weight: 700;
  color: var(--vision-title);
  margin-bottom: 8px;
  font-size: 0.82rem;
}
.fishing-vision-row { display: flex; gap: 8px; margin-bottom: 4px; }
.fishing-vision-label { color: var(--muted); min-width: 4.5em; flex-shrink: 0; }
.fishing-vision-summary { margin: 6px 0 8px; color: var(--vision-summary); line-height: 1.55; }
.fishing-vision-entities { display: flex; flex-wrap: wrap; gap: 6px; margin-bottom: 8px; }
.fishing-vision-tag {
  padding: 2px 8px;
  border-radius: 999px;
  background: var(--vision-tag-bg);
  border: 1px solid var(--vision-tag-border);
  font-size: 0.78rem;
}
.fishing-vision-kb { margin-bottom: 6px; color: var(--vision-kb); font-size: 0.82rem; }
.fishing-vision-kb-list { margin: 6px 0 8px; display: flex; flex-direction: column; gap: 4px; }
.fishing-vision-kb-item {
  display: flex; flex-wrap: wrap; align-items: center; gap: 6px;
  font-size: 0.82rem; padding: 4px 8px; border-radius: 6px;
  background: var(--vision-tag-bg); border: 1px solid var(--vision-tag-border);
}
.fishing-vision-kb-badge { font-size: 0.72rem; color: var(--vision-kb); }
.trust-verified { border-color: #3fb950; }
.trust-likely { border-color: #d4a72c; }
.trust-inferred { border-color: #db6d28; }
.trust-uncertain { border-color: #f85149; }
.fishing-vision-suggestions { margin: 6px 0 0 1.1em; color: var(--muted); font-size: 0.8rem; }
.fishing-vision-suggestions li { margin-bottom: 4px; }

/* ── 主 Tab 切换 ── */
.main-tabs {
  display: inline-flex;
  gap: 4px;
  margin-left: 16px;
  padding: 3px;
  border-radius: 10px;
  background: var(--hover-bg);
  border: 1px solid var(--border);
}
.main-tab-btn {
  padding: 6px 16px;
  border: none;
  border-radius: 8px;
  background: transparent;
  color: var(--muted);
  font-size: 0.88rem;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.15s, color 0.15s;
}
.main-tab-btn:hover { color: var(--text); background: var(--hover-bg); }
.main-tab-btn.active {
  background: var(--accent);
  color: #fff;
}

/* ── 识鱼 Tab ── */
.chat-panel { display: flex; flex-direction: column; flex: 1; min-height: 0; }
.identify-panel {
  flex: 1;
  overflow-y: auto;
  padding: 24px 16px 48px;
}
.identify-inner {
  max-width: 42rem;
  margin: 0 auto;
}
.identify-upload-zone { text-align: center; padding: 32px 0; }
.identify-upload-zone h2 { font-size: 1.35rem; margin-bottom: 8px; }
.identify-hint { color: var(--muted); font-size: 0.9rem; margin-bottom: 24px; }
.identify-dropzone {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
  padding: 48px 24px;
  border: 2px dashed var(--border);
  border-radius: 16px;
  background: var(--input-bg);
  color: var(--muted);
  cursor: pointer;
  transition: border-color 0.15s, background 0.15s;
}
.identify-dropzone:hover { border-color: var(--accent); color: var(--accent); }
.identify-dropzone.has-images { padding: 24px; }
.identify-preview-bar {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 8px;
  margin: 16px 0;
}
.identify-text-input {
  width: 100%;
  max-width: 24rem;
  margin: 16px auto;
  display: block;
  padding: 10px 14px;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: var(--input-bg);
  color: var(--text);
  font-size: 0.95rem;
}
.identify-submit-btn {
  margin-top: 8px;
  padding: 12px 32px;
  border: none;
  border-radius: 10px;
  background: var(--accent);
  color: #fff;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
}
.identify-submit-btn:disabled { opacity: 0.5; cursor: not-allowed; }
.identify-error { margin-top: 16px; text-align: center; }
.identify-results-header { margin-bottom: 20px; }
.identify-back-btn {
  border: none;
  background: none;
  color: var(--accent);
  cursor: pointer;
  font-size: 0.9rem;
  margin-bottom: 12px;
}
.identify-summary {
  color: var(--vision-summary);
  line-height: 1.6;
  font-size: 0.95rem;
}

/* ── 标准鱼种卡片（FishSpeciesCard）── */
.fish-cards-in-chat {
  margin-bottom: 12px;
}
.fish-cards-in-chat .species-card:last-child {
  margin-bottom: 0;
}
.species-card {
  margin-bottom: 20px;
  padding: 20px;
  border-radius: 14px;
  border: 2px solid var(--vision-card-border);
  background: var(--vision-card-bg);
}
.species-card.trust-verified { border-color: #3fb950; }
.species-card.trust-likely { border-color: #d4a72c; }
.species-card.trust-inferred { border-color: #db6d28; background: rgba(219, 109, 40, 0.06); }
.species-card.trust-uncertain { border-color: #f85149; }
.species-card-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 12px;
  flex-wrap: wrap;
}
.species-card-name { font-size: 1.25rem; font-weight: 700; margin: 0; color: var(--vision-title); }
.species-trust-badge {
  padding: 4px 10px;
  border-radius: 999px;
  font-size: 0.78rem;
  font-weight: 600;
  border: 1px solid currentColor;
}
.species-trust-badge.trust-verified { color: #3fb950; background: rgba(63, 185, 80, 0.12); }
.species-trust-badge.trust-likely { color: #d4a72c; background: rgba(212, 167, 44, 0.12); }
.species-trust-badge.trust-inferred { color: #db6d28; background: rgba(219, 109, 40, 0.12); }
.species-trust-badge.trust-uncertain { color: #f85149; background: rgba(248, 81, 73, 0.12); }
.species-card-notice {
  padding: 10px 12px;
  margin-bottom: 14px;
  border-radius: 8px;
  background: rgba(219, 109, 40, 0.1);
  border: 1px solid #db6d28;
  color: #db6d28;
  font-size: 0.86rem;
  line-height: 1.5;
  white-space: pre-wrap;
}
.species-card-grid {
  display: grid;
  grid-template-columns: 4.5em 1fr;
  gap: 8px 12px;
  font-size: 0.88rem;
  margin: 0;
}
.species-card-grid dt {
  color: var(--muted);
  font-weight: 600;
  margin: 0;
}
.species-card-grid dd {
  margin: 0;
  color: var(--text);
  line-height: 1.55;
}
.species-continue-btn {
  margin-top: 16px;
  width: 100%;
  padding: 10px;
  border: 1px solid var(--accent);
  border-radius: 10px;
  background: transparent;
  color: var(--accent);
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.15s;
}
.species-continue-btn:hover { background: var(--hover-accent-bg); }

/* uncertain 识图：文字补充提示（无按钮） */
.clarification-hint {
  margin-top: 12px;
  padding: 10px 12px;
  border-left: 3px solid var(--accent);
  border-radius: 0 6px 6px 0;
  background: var(--hover-bg);
  color: var(--text-muted);
  font-size: 0.85rem;
  line-height: 1.5;
}

/* 易混淆鱼种对比视图 */
.confusion-compare-block {
  margin-top: 12px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.confusion-compare-item {
  border: 1px dashed var(--border);
  border-radius: 8px;
  background: var(--hover-bg);
  overflow: hidden;
}
.confusion-compare-summary {
  padding: 8px 12px;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--accent);
  cursor: pointer;
  list-style: none;
}
.confusion-compare-summary::-webkit-details-marker { display: none; }
.confusion-compare-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.8rem;
}
.confusion-compare-table th,
.confusion-compare-table td {
  padding: 6px 10px;
  border-top: 1px solid var(--border);
  text-align: left;
  vertical-align: top;
}
.confusion-compare-table th {
  background: var(--input-bg);
  color: var(--muted);
  font-weight: 600;
}

/* 出钓推荐 Mock 天气提示 */
.mock-weather-badge {
  display: inline-block;
  margin: 8px 0 4px;
  padding: 4px 10px;
  border-radius: 999px;
  background: var(--warning-bg, #fff3cd);
  color: var(--warning-text, #856404);
  border: 1px solid var(--warning-border, #ffeeba);
  font-size: 0.78rem;
  font-weight: 600;
}

/* RAG 来源可展开摘要：摘录浮层，不撑开后续消息 */
.web-research-block {
  margin: 0 0 14px;
  color: var(--muted);
  font-size: 0.82rem;
}
.web-research-summary {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  min-height: 28px;
  padding: 0 2px;
  cursor: pointer;
  list-style: none;
  user-select: none;
}
.web-research-summary::-webkit-details-marker { display: none; }
.web-research-summary::after {
  content: "›";
  display: inline-block;
  color: var(--muted);
  font-size: 1rem;
  line-height: 1;
  transition: transform 0.16s ease;
}
.web-research-block[open] .web-research-summary::after {
  transform: rotate(90deg);
}
.web-research-summary:hover,
.web-research-summary:focus-visible {
  color: var(--text);
}
.web-research-summary:focus-visible {
  border-radius: 4px;
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}
.web-research-list {
  margin: 4px 0 14px;
  padding: 8px 0 12px 1.65rem;
  border-bottom: 1px dashed var(--row-border);
}
.web-research-list li {
  margin: 0;
  padding: 3px 0 3px 2px;
  color: var(--muted);
  line-height: 1.55;
}
.web-research-link {
  color: var(--accent);
  text-decoration: none;
  overflow-wrap: anywhere;
}
.web-research-link:hover,
.web-research-link:focus-visible {
  text-decoration: underline;
  text-underline-offset: 2px;
}
@media (prefers-reduced-motion: reduce) {
  .web-research-summary::after { transition: none; }
}

.rag-sources-block {
  position: relative;
  margin-top: 6px;
  font-size: 0.82rem;
  color: var(--muted);
  z-index: 1;
}
.rag-sources-line { display: inline; }
.rag-sources-label { margin-right: 4px; }
.rag-source-link {
  padding: 0;
  border: none;
  background: none;
  color: var(--accent);
  font-size: inherit;
  cursor: pointer;
  text-decoration: underline;
  text-underline-offset: 2px;
}
.rag-source-link:hover { color: var(--text); }
.rag-source-plain { color: var(--muted); }
.rag-source-sep { margin: 0 2px; }
.rag-source-snippet {
  position: absolute;
  left: 0;
  top: auto;
  bottom: calc(100% + 6px);
  z-index: 7;
  width: min(36rem, 100%);
  margin: 0;
  padding: 8px 10px;
  border: 1px solid var(--row-border);
  border-left: 3px solid var(--accent);
  border-radius: 10px;
  background: var(--input-bg);
  box-shadow: var(--toast-shadow);
  color: var(--text-muted);
  font-size: 0.8rem;
  line-height: 1.45;
  white-space: pre-wrap;
  top: auto;
  bottom: calc(100% + 6px);
  max-height: min(40vh, 16rem);
  overflow: auto;
  overflow-anchor: none;
}

/* 待发送图片：统一 1:1 缩略图，点开看原图 */
.fishing-image-preview-bar {
  max-width: var(--thread-width);
  margin: 0 auto 10px;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
}
.fishing-image-count { font-size: 0.78rem; color: var(--muted); }
.fishing-image-preview {
  position: relative;
  width: 72px;
  height: 72px;
  flex: 0 0 72px;
  border: 1px solid var(--border);
  border-radius: 10px;
  overflow: hidden;
  background: var(--input-bg);
}
.fishing-image-thumb {
  display: block;
  width: 100%;
  height: 100%;
  padding: 0;
  border: none;
  background: transparent;
  cursor: zoom-in;
}
.fishing-image-preview img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
}
.fishing-image-preview .remove {
  position: absolute;
  top: 4px;
  right: 4px;
  z-index: 1;
  width: 20px;
  height: 20px;
  border: none;
  border-radius: 50%;
  background: var(--preview-remove-bg);
  color: #fff;
  line-height: 20px;
  font-size: 14px;
  cursor: pointer;
}
.fishing-image-preview .remove:hover { background: var(--danger); }

/* ── 消息附图大图预览 ── */
.image-viewer-overlay {
  position: fixed;
  inset: 0;
  z-index: 3000;
  display: flex !important; /* 覆盖挂载前的 inline display:none */
  align-items: center;
  justify-content: center;
  padding: 24px;
  background: rgba(0, 0, 0, 0.78);
  backdrop-filter: blur(4px);
}
.image-viewer-panel {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 16px;
  max-width: min(96vw, 960px);
  max-height: 92vh;
}
.image-viewer-img {
  max-width: 100%;
  max-height: calc(92vh - 64px);
  object-fit: contain;
  border-radius: 12px;
  box-shadow: 0 12px 48px rgba(0, 0, 0, 0.45);
  background: #111;
}
.image-viewer-toolbar {
  display: flex;
  gap: 10px;
}
.image-viewer-btn {
  padding: 8px 16px;
  border: none;
  border-radius: 8px;
  background: var(--accent);
  color: #fff;
  font-size: 0.88rem;
  cursor: pointer;
}
.image-viewer-btn:hover { opacity: 0.92; }
.image-viewer-btn-secondary {
  background: rgba(255, 255, 255, 0.14);
  color: #fff;
  border: 1px solid rgba(255, 255, 255, 0.25);
}

/* ── 响应式 ── */
@media (max-width: 768px) {
  .sidebar { width: 200px; }
  .chat-header-sub { display: none; }
  .theme-toggle-label { display: none; }
  .llm-provider-label { display: none; }
  .llm-provider-select { max-width: 9.5rem; }
  .chat-thread { padding: 16px 12px 32px; }
}

@media (max-width: 580px) {
  /* 侧栏改为左侧抽屉，默认收起 */
  .sidebar {
    position: fixed;
    left: 0;
    top: 0;
    bottom: 0;
    z-index: 1200;
    width: min(86vw, 300px);
    display: flex;
    transform: translateX(-105%);
    transition: transform 0.22s ease;
    box-shadow: none;
  }
  .sidebar.is-open {
    transform: translateX(0);
    box-shadow: 8px 0 32px rgba(0, 0, 0, 0.28);
  }

  .sidebar-top {
    position: relative;
    padding-right: 44px;
  }
  .sidebar-drawer-close {
    display: flex;
    position: absolute;
    top: 10px;
    right: 10px;
    width: 32px;
    height: 32px;
    align-items: center;
    justify-content: center;
    border: none;
    border-radius: 8px;
    background: transparent;
    color: var(--muted);
    font-size: 1.35rem;
    line-height: 1;
    cursor: pointer;
  }
  .sidebar-drawer-close:hover {
    background: var(--hover-bg);
    color: var(--text);
  }

  .sidebar-menu-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    padding: 0;
    border: 1px solid var(--border);
    border-radius: 8px;
    background: transparent;
    color: var(--text);
    cursor: pointer;
  }
  .sidebar-menu-btn:hover {
    background: var(--hover-bg);
    border-color: var(--accent);
  }

  .sidebar-backdrop {
    display: block;
    position: fixed;
    inset: 0;
    z-index: 1100;
    background: rgba(0, 0, 0, 0.45);
  }

  .chat-header-left {
    gap: 8px;
    align-items: center;
  }

  .chat-header {
    height: auto;
    min-height: var(--topbar-height);
    flex-wrap: wrap;
    padding: 10px 16px;
  }

  .chat-footer { padding: 10px 12px 14px; }
}