/* ============================================================
   DeepSeek 主题 — 还原 chat.deepseek.com 当前界面
   浅色默认:白画布 + 品牌蓝 #4d6bfe
            + 侧栏头部 logo/搜索/新建/主题切换
            + 空态「快速/专家/识图」模式切换
            + 输入框下方「深度思考/智能搜索」独立开关
            + 用户灰泡右对齐(无头像)
   深色: #1a1a1a 画布
   ============================================================ */
body.theme-deepseek {
  --provider-sidebar-width: 260px;
  --provider-content-width: 800px;
  --font-body: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-display: inherit;

  --bg-main: #ffffff;
  --bg-sidebar: #f9fafb;
  --bg-panel: #ffffff;
  --bg-menu: #ffffff;
  --fg: #1a1a1a;
  --fg-dim: #8a8a8a;
  --border: #eaeaea;
  --border-strong: #e2e2e2;
  --accent: #4d6bfe;

  --sidebar-w: var(--provider-sidebar-width);
  --chat-w: var(--provider-content-width);

  --item-hover: #f2f3f5;
  --item-active: #e9ebfd;
  --radius-btn: 12px;
  --radius-item: 10px;

  --newchat-fg: #1a1a1a;
  --newchat-bg: transparent;
  --newchat-bg-hover: #f2f3f5;
  --newchat-border: none;

  --avatar-bg: #e9ebfd;
  --avatar-fg: #4d6bfe;
  --avatar-radius: 8px;

  --user-bubble: #f4f4f5;
  --user-bubble-fg: #1a1a1a;
  --user-bubble-radius: 16px;
  --user-bubble-pad: 11px 15px;

  --composer-bg: #ffffff;
  --composer-border: 1px solid #e6e6e6;
  --composer-radius: 20px;
  --composer-shadow: 0 1px 4px rgba(0, 0, 0, .05);
  --composer-focus: #4d6bfe;

  --send-bg: #1a1a1a;
  --send-fg: #ffffff;
  --send-radius: 50%;

  --seg-bg: transparent;
  --seg-active-bg: #e9ebfd;
  --seg-active-fg: #4d6bfe;

  --search-bg: #f2f3f5;

  --code-bg: #f7f7f8;
  --code-bar-bg: #efefef;
  --code-inline-bg: #f0f0f2;
  --scrollbar: #d8d8d8;
  --user-avatar: #4d6bfe;
}

html[data-theme="dark"] body.theme-deepseek {
  --bg-main: #16161a;
  --bg-sidebar: #1f1f23;
  --bg-panel: #1f1f23;
  --bg-menu: #2a2a2f;
  --fg: #e8e8ea;
  --fg-dim: #9a9aa0;
  --border: #2e2e33;
  --border-strong: #38383f;
  --accent: #5b7cfa;

  --item-hover: rgba(255, 255, 255, .06);
  --item-active: #2b3358;
  --newchat-bg-hover: rgba(255, 255, 255, .06);
  --avatar-bg: #2b3358;
  --avatar-fg: #8aa0ff;

  --user-bubble: #2c2c31;
  --user-bubble-fg: #e8e8ea;

  --composer-bg: #1f1f23;
  --composer-border: 1px solid #34343a;
  --composer-shadow: none;
  --composer-focus: #5b7cfa;

  --send-bg: #e8e8ea;
  --send-fg: #16161a;

  --seg-bg: transparent;
  --seg-active-bg: #2b3358;
  --seg-active-fg: #8aa0ff;

  --search-bg: rgba(255, 255, 255, .06);
  --code-bg: #1b1b1f;
  --code-bar-bg: #25252a;
  --code-inline-bg: rgba(255, 255, 255, .08);
  --scrollbar: rgba(255, 255, 255, .16);
  --user-avatar: #5b7cfa;
}

body.theme-deepseek { font-family: var(--font-body); background: var(--bg-main); color: var(--fg); -webkit-font-smoothing: antialiased; }

/* 顶栏:会话标题 + 模型选择器(在输入框内) */
body.theme-deepseek .topbar-wordmark { display: flex; align-items: center; gap: 8px; font-size: 18px; font-weight: 600; color: var(--fg); }
body.theme-deepseek .topbar-wordmark .wm-logo { color: var(--accent); }
body.theme-deepseek .topbar-wordmark .wm-logo svg { width: 22px; height: 22px; }
body.theme-deepseek .topbar .model-picker { display: none; }
body.theme-deepseek .session-title-bar { display: block; font-size: 13px; color: var(--fg-dim); }
body.theme-deepseek .composer-picker { display: block; }

/* 侧栏 */
body.theme-deepseek .sidebar { background: var(--bg-sidebar); border-right: 1px solid var(--border); }
body.theme-deepseek .brand { gap: 8px; }
body.theme-deepseek .brand-name { font-weight: 600; font-size: 17px; color: var(--fg); }
body.theme-deepseek .brand-icon { color: var(--accent); }
body.theme-deepseek .new-chat-btn {
  border: var(--newchat-border); border-radius: 12px; padding: 9px 12px; color: var(--newchat-fg); gap: 8px;
}
body.theme-deepseek .new-chat-btn:hover { background: var(--newchat-bg-hover); }
body.theme-deepseek .snav-item { color: var(--fg); }
body.theme-deepseek .snav-item:hover { background: var(--item-hover); }
body.theme-deepseek .sidebar-search { background: var(--search-bg); }
body.theme-deepseek .sidebar-search:hover, body.theme-deepseek .sidebar-search:focus-within { background: var(--item-hover); }

/* 空状态:问候语 + 建议卡片(2 列网格) + 输入框 */
body.empty-chat.theme-deepseek .main::before { content: ''; flex: 1 1 0; }
body.empty-chat.theme-deepseek .main::after  { content: ''; flex: 1.2 1 0; }
body.empty-chat.theme-deepseek .chat-scroll  { flex: 0 0 auto; overflow: visible; }
body.empty-chat.theme-deepseek .welcome { display: flex; flex-direction: column; align-items: center; justify-content: center; padding: 0 24px 18px; }
body.theme-deepseek .welcome-icon { color: var(--accent); margin-bottom: 14px; }
body.theme-deepseek .welcome-icon svg { width: 40px; height: 40px; }
body.theme-deepseek .welcome-title { font-size: 28px; font-weight: 600; color: var(--fg); text-align: center; }
body.theme-deepseek .welcome-sub { display: none; }

/* 建议卡片(原竖向列表改为卡片网格) */
body.theme-deepseek .welcome-suggest {
  max-width: var(--chat-w); width: 100%; margin: 6px auto 0;
  display: grid; grid-template-columns: 1fr 1fr; gap: 10px;
}
body.theme-deepseek .suggest-item {
  display: flex; align-items: center; gap: 10px;
  padding: 13px 14px; border: 1px solid var(--border); border-radius: 14px;
  background: var(--bg-main); color: var(--fg); font-size: 14px;
}
body.theme-deepseek .suggest-item:hover { background: var(--item-hover); border-color: var(--border-strong); color: var(--fg); }
body.theme-deepseek .suggest-item svg { flex-shrink: 0; color: var(--accent); opacity: 1; }

/* 消息:用户灰泡右对齐(无头像);助手无泡 */
body.theme-deepseek .msg-assistant .msg-avatar { display: none; }
body.theme-deepseek .msg-user .msg-avatar { display: none; }
body.theme-deepseek .msg-user { flex-direction: row-reverse; }
body.theme-deepseek .msg-user .msg-body { display: flex; flex-direction: column; align-items: flex-end; }
body.theme-deepseek .msg-user .msg-content { max-width: 76%; background: var(--user-bubble); color: var(--user-bubble-fg); border-radius: var(--user-bubble-radius); padding: var(--user-bubble-pad); }
body.theme-deepseek .msg-assistant .msg-content { font-size: 15.5px; line-height: 1.75; color: var(--fg); max-width: 100%; }
body.theme-deepseek .msg-content pre { background: var(--code-bg); border: 1px solid var(--border); }
body.theme-deepseek .msg-content code { background: var(--code-inline-bg); }

/* 输入框: [+] [深度思考/联网搜索] [文本] [模型芯片] [麦克风] [发送] */
body.theme-deepseek .composer {
  max-width: var(--chat-w); padding: 10px 12px;
  border: var(--composer-border); border-radius: var(--composer-radius);
  box-shadow: var(--composer-shadow); background: var(--composer-bg);
}
body.theme-deepseek .composer:focus-within { border-color: var(--composer-focus); box-shadow: 0 0 0 3px rgba(77, 107, 254, .12); }
body.theme-deepseek .composer-grid {
  display: grid; align-items: center; gap: 8px;
  grid-template-columns: auto auto 1fr auto auto auto;
  grid-template-areas: "attach tools text picker mic send";
}
body.theme-deepseek .composer-grid .attach-btn { grid-area: attach; color: var(--fg-dim); }
body.theme-deepseek .composer-grid .composer-tools { grid-area: tools; display: flex; gap: 8px; }
body.theme-deepseek .composer-grid textarea { grid-area: text; padding: 7px 4px; font-size: 15px; }
body.theme-deepseek .composer-grid .composer-picker { grid-area: picker; }
body.theme-deepseek .composer-grid .mic-area { grid-area: mic; }
body.theme-deepseek .composer-grid #send-btn { grid-area: send; }
body.theme-deepseek .composer-grid #stop-btn { grid-area: send; }

/* 深度思考 / 联网搜索 独立开关(DeepSeek 特色) */
body.theme-deepseek .seg {
  background: var(--seg-bg); gap: 6px; padding: 0;
}
body.theme-deepseek .seg-item {
  padding: 6px 12px; border-radius: 999px; border: 1px solid var(--border);
  background: none; color: var(--fg-dim); font-size: 12.5px;
}
body.theme-deepseek .seg-item.active {
  background: var(--seg-active-bg); color: var(--seg-active-fg);
  border-color: transparent; font-weight: 500;
}

body.theme-deepseek .send-btn { width: 36px; height: 36px; }
body.theme-deepseek .send-btn:hover { opacity: .9; }
body.theme-deepseek .composer-model-btn { color: var(--fg-dim); font-size: 13px; }
body.theme-deepseek .composer-model-btn:hover { background: var(--item-hover); color: var(--fg); }
body.theme-deepseek .attach-btn, body.theme-deepseek .mic-btn { color: var(--fg-dim); }
body.theme-deepseek .attach-btn:hover, body.theme-deepseek .mic-btn:hover { background: var(--item-hover); color: var(--fg); }

/* 弹层 */
body.theme-deepseek .primary-btn, body.theme-deepseek .login-card button:not(.auth-tab) { background: var(--accent); }
body.theme-deepseek .modal, body.theme-deepseek .login-card { border: 1px solid var(--border-strong); }
body.theme-deepseek .modal-tabs .tab.active { color: var(--accent); border-bottom-color: var(--accent); }
body.theme-deepseek #settings-status { color: #2a9d3f; }
body.theme-deepseek .user-menu, body.theme-deepseek .model-menu { border-radius: 14px; }

/* 响应式 */
@media (max-width: 768px) {
  body.theme-deepseek .welcome-title { font-size: 23px; }
  body.theme-deepseek .welcome-suggest { grid-template-columns: 1fr; }
  body.empty-chat.theme-deepseek .main::before, body.empty-chat.theme-deepseek .main::after { flex: .5 1 0; }
}

/* 真实 DeepSeek 布局:侧栏默认打开,控制入口集中在侧栏头部;主内容区无顶栏 */
body.theme-deepseek .topbar { display: none; }
body.theme-deepseek .expand-btn { display: none !important; }
body.theme-deepseek.sidebar-collapsed .topbar { display: flex; }
body.theme-deepseek.sidebar-collapsed .topbar > :not(.expand-btn) { display: none !important; }
body.theme-deepseek.sidebar-collapsed .expand-btn { display: inline-flex !important; }

/* 侧栏头部:logo + 搜索/新建/主题切换 */
body.theme-deepseek .sidebar-header { padding: 12px 14px; justify-content: space-between; }
body.theme-deepseek .brand { gap: 6px; }
/* 真实 DeepSeek 字标(鲸鱼 + deepseek)已含品牌文字,隐藏单独的名称 */
body.theme-deepseek .brand-name { display: none; }
body.theme-deepseek .brand-icon { color: var(--accent); }
body.theme-deepseek .brand-icon img.ds-logo-img { height: 20px; width: auto; display: block; }
body.theme-deepseek .header-btns { display: flex; gap: 2px; }
body.theme-deepseek .header-btns .home-btn,
body.theme-deepseek .header-btns .collapse-btn { display: none; }
body.theme-deepseek .ds-home-btn,
body.theme-deepseek .ds-search-btn,
body.theme-deepseek .ds-newchat-btn {
  width: 32px; height: 32px; border-radius: 8px; border: none; background: none;
  display: inline-flex; align-items: center; justify-content: center;
  color: var(--fg-dim); cursor: pointer;
}
body.theme-deepseek .ds-home-btn:hover,
body.theme-deepseek .ds-search-btn:hover,
body.theme-deepseek .ds-newchat-btn:hover { background: var(--item-hover); color: var(--fg); }

/* 侧栏搜索默认收起,点击搜索图标展开 */
body.theme-deepseek .sidebar-search { display: none; margin: 0 12px 8px; }
body.theme-deepseek .sidebar-search.visible { display: flex; }

/* 空态欢迎区:标题 + 模式切换(标题左侧带小 logo) */
body.theme-deepseek .welcome-icon { display: none; }
body.theme-deepseek .welcome-title {
  display: inline-flex; align-items: center; gap: 10px;
  font-size: 24px; font-weight: 600;
}
body.theme-deepseek .welcome-title-logo { color: var(--accent); display: inline-flex; align-items: center; }
body.theme-deepseek .welcome-title-logo img.ds-logo-img { height: 24px; width: auto; display: inline-block; }
body.theme-deepseek .welcome-sub { display: none; }
body.theme-deepseek .welcome-modes { display: flex; justify-content: center; gap: 8px; margin-top: 16px; }
body.theme-deepseek .mode-pill {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 7px 14px; border-radius: 999px;
  border: 1px solid var(--border); background: var(--bg-main);
  color: var(--fg-dim); font-size: 13px; cursor: pointer;
}
body.theme-deepseek .mode-pill.active {
  background: var(--seg-active-bg); color: var(--seg-active-fg);
  border-color: transparent; font-weight: 500;
}
body.theme-deepseek .mode-pill:hover:not(.active) { background: var(--item-hover); color: var(--fg); }

/* 输入区重构:文本域在上,工具行在下 */
body.theme-deepseek .composer-grid {
  grid-template-columns: auto 1fr auto auto;
  grid-template-rows: auto auto;
  grid-template-areas:
    "attach text text send"
    ". tools picker mic";
  gap: 8px 10px; align-items: center;
}
body.theme-deepseek .composer-grid .attach-btn { grid-area: attach; align-self: end; margin-bottom: 4px; }
body.theme-deepseek .composer-grid .composer-tools { grid-area: tools; justify-self: start; }
body.theme-deepseek .composer-grid textarea { grid-area: text; padding: 6px 4px; min-height: 24px; }
body.theme-deepseek .composer-grid .composer-picker { grid-area: picker; justify-self: end; }
body.theme-deepseek .composer-grid .mic-area { grid-area: mic; justify-self: end; }
body.theme-deepseek .composer-grid #send-btn { grid-area: send; align-self: end; margin-bottom: 4px; }
body.theme-deepseek .composer-grid #stop-btn { grid-area: send; align-self: end; margin-bottom: 4px; }

body.theme-deepseek .composer-hint { display: none; }
body.theme-deepseek .welcome-suggest { display: none; }

@media (max-width: 360px) {
  body.theme-deepseek .composer-grid {
    grid-template-areas:
      "attach text text send"
      "tools tools picker mic";
  }
}

/* Provider-owned theme entry. Shared runtime wiring can attach this class
 * later without changing the DeepSeek visual and accessibility contract. */
body.theme-deepseek .deepseek-theme-trigger {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 36px;
  min-height: 36px;
  width: 32px;
  height: 32px;
  border: 0;
  border-radius: 8px;
  background: transparent;
  color: var(--fg-dim);
  cursor: pointer;
}
body.theme-deepseek .deepseek-theme-trigger:hover {
  background: var(--item-hover);
  color: var(--fg);
}
body.theme-deepseek .deepseek-theme-trigger:focus-visible,
body.theme-deepseek .mode-pill:focus-visible,
body.theme-deepseek .seg-item:focus-visible {
  outline: 3px solid var(--accent);
  outline-offset: 2px;
}
body.theme-deepseek .mode-pill[aria-pressed="true"],
body.theme-deepseek .mode-pill[aria-selected="true"] {
  background: var(--seg-active-bg);
  border-color: transparent;
  color: var(--seg-active-fg);
  font-weight: 500;
}

body.theme-deepseek .composer-wrap {
  padding-bottom: calc(14px + env(safe-area-inset-bottom));
}

@media (max-width: 680px) {
  body.theme-deepseek .sidebar-header,
  body.theme-deepseek .topbar {
    padding-left: max(12px, env(safe-area-inset-left));
    padding-right: max(12px, env(safe-area-inset-right));
  }

  body.theme-deepseek .deepseek-theme-trigger {
    min-width: 44px;
    min-height: 44px;
  }

  body.theme-deepseek .composer-wrap {
    padding-right: max(12px, env(safe-area-inset-right));
    padding-left: max(12px, env(safe-area-inset-left));
  }

  /* 移动端对齐官方：双层卡片流式布局，输入框 100% 满宽 */
  body.theme-deepseek .composer {
    border-radius: 22px;
    padding: 10px 14px 10px;
  }
  body.theme-deepseek .composer-grid {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 6px 10px;
    grid-template-columns: none;
    grid-template-areas: none;
  }
  body.theme-deepseek .composer-grid textarea {
    order: 1;
    width: 100%;
    flex: 1 1 100%;
    min-height: 38px;
    padding: 2px 2px 6px;
    font-size: 16px;
  }
  body.theme-deepseek .composer-grid .attach-btn { order: 2; margin: 0; }
  body.theme-deepseek .composer-grid .composer-tools { order: 3; }
  body.theme-deepseek .composer-picker {
    order: 4;
    margin-left: auto;
    max-width: 130px;
  }
  body.theme-deepseek .composer-model-btn {
    padding: 4px 10px;
    font-size: 12px;
    border-radius: 999px;
    background: var(--item-hover, rgba(255, 255, 255, 0.08));
    color: var(--fg);
    white-space: nowrap;
  }
  body.theme-deepseek .composer-model-btn span {
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
  }
  body.theme-deepseek .composer-grid #send-btn,
  body.theme-deepseek .composer-grid #stop-btn { order: 5; }

  body.theme-deepseek .welcome-modes {
    max-width: 100%;
    justify-content: flex-start;
    overflow-x: auto;
    padding: 2px;
  }
  body.theme-deepseek .mode-pill { flex: 0 0 auto; }
}

@media (prefers-reduced-motion: reduce) {
  body.theme-deepseek *,
  body.theme-deepseek *::before,
  body.theme-deepseek *::after {
    animation-duration: .01ms !important;
    animation-iteration-count: 1 !important;
    scroll-behavior: auto !important;
    transition-duration: .01ms !important;
  }
}

@media (forced-colors: active) {
  body.theme-deepseek .deepseek-theme-trigger,
  body.theme-deepseek .mode-pill,
  body.theme-deepseek .seg-item,
  body.theme-deepseek .composer {
    border: 1px solid ButtonText;
    background: Canvas;
    color: CanvasText;
    box-shadow: none;
  }

  body.theme-deepseek .deepseek-theme-trigger:focus-visible,
  body.theme-deepseek .mode-pill:focus-visible,
  body.theme-deepseek .seg-item:focus-visible {
    outline: 2px solid Highlight;
  }
}

/* Official DeepSeek wait: three staggered blue dots. */
body.theme-deepseek .waiting-deepseek {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  height: 14px;
}
body.theme-deepseek .waiting-elapsed {
  font-size: 12px;
  color: #4d6bfe;
}
body.theme-deepseek .waiting-deepseek i {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--accent);
  animation: deepseek-waiting-bounce 1.05s infinite ease-in-out;
}
body.theme-deepseek .waiting-deepseek i:nth-child(2) { animation-delay: .14s; }
body.theme-deepseek .waiting-deepseek i:nth-child(3) { animation-delay: .28s; }
@keyframes deepseek-waiting-bounce {
  0%, 80%, 100% { opacity: .28; transform: translateY(0); }
  40% { opacity: 1; transform: translateY(-3px); }
}
@media (prefers-reduced-motion: reduce) {
  body.theme-deepseek .waiting-deepseek i { animation: none; opacity: 1; transform: none; }
}