:root {
      --primary: #1677ff;
      --primary-hover: #0958d9;
      --bg: #eef3f8;
      --card-bg: #ffffff;
      --user-bubble: #1677ff;
      --assistant-bubble: #f8fafc;
      --system-color: #475569;
      --danger: #ff4d4f;
      --text-dark: #172033;
      --text-light: #fff;
      --border: #d9e2ee;
      --radius: 10px;
      --composer-height: 88px;
    }

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

    html {
      height: 100%;
    }

    body {
      font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', sans-serif;
      display: flex;
      justify-content: center;
      align-items: center;
      min-height: 100vh;
      min-height: 100dvh;
      padding: 16px;
      background:
        radial-gradient(circle at 12% 12%, rgba(22, 119, 255, 0.08), transparent 28%),
        linear-gradient(135deg, #e7edf5 0%, #f8fafc 44%, #eef5f2 100%);
      overflow: auto;
    }

    #chat-container {
      width: 100%;
      max-width: 1120px;
      height: min(900px, calc(100vh - 32px));
      height: min(900px, calc(100dvh - 32px));
      max-height: 100vh;
      max-height: 100dvh;
      min-height: 0;
      background: var(--card-bg);
      border-radius: var(--radius);
      border: 1px solid rgba(148, 163, 184, 0.34);
      box-shadow: 0 18px 50px rgba(15, 23, 42, 0.16);
      display: flex;
      flex-direction: column;
      overflow: clip;
    }

    #header {
      min-height: 68px;
      padding: 12px 18px;
      background: #111827;
      color: #fff;
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 16px;
      flex-shrink: 0;
    }

    .brand {
      min-width: 0;
      display: flex;
      align-items: center;
      gap: 11px;
    }

    .brand-mark {
      width: 34px;
      height: 34px;
      border-radius: 9px;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      background: #1677ff;
      color: #fff;
      font-size: 13px;
      font-weight: 800;
      letter-spacing: 0;
      flex: 0 0 auto;
    }

    .brand-copy {
      min-width: 0;
      display: grid;
      gap: 2px;
    }

    #header-title {
      font-size: 15px;
      font-weight: 700;
      line-height: 1.2;
      overflow: hidden;
      text-overflow: ellipsis;
      white-space: nowrap;
    }

    .header-subtitle {
      color: #aebbd0;
      font-size: 12px;
      line-height: 1.2;
      overflow: hidden;
      text-overflow: ellipsis;
      white-space: nowrap;
    }

    .header-controls {
      display: flex;
      align-items: center;
      gap: 10px;
      flex: 0 0 auto;
    }

    .status-pill {
      min-height: 32px;
      padding: 0 10px;
      border: 1px solid rgba(255,255,255,0.16);
      border-radius: 999px;
      display: inline-flex;
      align-items: center;
      gap: 7px;
      color: #dbeafe;
      background: rgba(255,255,255,0.08);
      font-size: 12px;
      white-space: nowrap;
    }

    #status-dot {
      width: 8px; height: 8px;
      border-radius: 50%;
      background: #52c41a;
      transition: background 0.3s;
      box-shadow: 0 0 0 3px rgba(82, 196, 26, 0.18);
    }
    #status-dot.disconnected {
      background: #ff4d4f;
      box-shadow: 0 0 0 3px rgba(255, 77, 79, 0.2);
    }

    #agent-select {
      background: rgba(255,255,255,0.12);
      color: #fff;
      border: 1px solid rgba(255,255,255,0.28);
      border-radius: 8px;
      min-height: 34px;
      padding: 0 9px;
      font-size: 13px;
      outline: none;
      cursor: pointer;
    }

    #agent-select option { color: #333; }

    #messages {
      flex: 1;
      min-height: 0;
      overflow-y: auto;
      overscroll-behavior: contain;
      -webkit-overflow-scrolling: touch;
      padding: 18px clamp(14px, 3vw, 32px);
      display: flex;
      flex-direction: column;
      gap: 12px;
      background:
        linear-gradient(180deg, rgba(248,250,252,0.96), rgba(255,255,255,0.98)),
        #fff;
      scroll-padding-bottom: var(--composer-height);
    }

    @media (max-width: 640px) {
      body {
        padding: 0;
        align-items: stretch;
        overflow: auto;
      }

      #chat-container {
        min-height: 100vh;
        min-height: 100dvh;
        height: auto;
        max-height: none;
        border-radius: 0;
        overflow: visible;
      }

      #header {
        min-height: 58px;
        padding: 9px 10px;
        gap: 8px;
      }

      .brand {
        gap: 8px;
      }

      .brand-mark {
        width: 30px;
        height: 30px;
        border-radius: 8px;
        font-size: 12px;
      }

      .header-subtitle,
      #status-label {
        display: none;
      }

      .header-controls {
        gap: 7px;
      }

      .status-pill {
        min-width: 30px;
        min-height: 30px;
        padding: 0 9px;
      }

      #agent-select {
        max-width: 132px;
      }

      #messages {
        flex: none;
        min-height: calc(100vh - 132px);
        min-height: calc(100dvh - 132px);
        overflow: visible;
        padding: 12px 10px calc(var(--composer-height) + 24px);
        gap: 10px;
      }
    }

    .message {
      max-width: min(86%, 780px);
      padding: 11px 14px;
      border-radius: 10px;
      line-height: 1.62;
      font-size: 14px;
      overflow-wrap: anywhere;
      word-break: break-word;
      white-space: pre-wrap;
      animation: fadeIn 0.2s ease;
    }

    @keyframes fadeIn {
      from { opacity: 0; transform: translateY(8px); }
      to { opacity: 1; transform: translateY(0); }
    }

    .message.user {
      align-self: flex-end;
      background: var(--user-bubble);
      color: var(--text-light);
      border-bottom-right-radius: 5px;
      box-shadow: 0 2px 8px rgba(22, 119, 255, 0.22);
    }

    .message.assistant {
      align-self: flex-start;
      background: var(--assistant-bubble);
      color: var(--text-dark);
      border-bottom-left-radius: 5px;
      border: 1px solid var(--border);
      box-shadow: 0 2px 8px rgba(15, 23, 42, 0.04);
    }

    .message.assistant.markdown {
      white-space: normal;
      line-height: 1.72;
    }
    .message.assistant.markdown > :first-child { margin-top: 0; }
    .message.assistant.markdown > :last-child { margin-bottom: 0; }
    .message.assistant.markdown p { margin: 0 0 0.8em; }
    .message.assistant.markdown h1,
    .message.assistant.markdown h2,
    .message.assistant.markdown h3,
    .message.assistant.markdown h4 {
      margin: 1em 0 0.5em;
      line-height: 1.35;
      color: #1f2f46;
      font-weight: 700;
    }
    .message.assistant.markdown h1 { font-size: 20px; }
    .message.assistant.markdown h2 {
      font-size: 18px;
      padding-bottom: 5px;
      border-bottom: 1px solid #e4edff;
    }
    .message.assistant.markdown h3 {
      font-size: 16px;
      color: #244266;
    }
    .message.assistant.markdown h4 { font-size: 15px; }
    .message.assistant.markdown ul,
    .message.assistant.markdown ol {
      margin: 0 0 0.85em 1.25em;
      padding: 0;
    }
    .message.assistant.markdown li {
      margin: 0.28em 0;
      padding-left: 0.15em;
    }
    .message.assistant.markdown li::marker { color: #1677ff; }
    .message.assistant.markdown blockquote {
      margin: 0.85em 0;
      padding: 0.35em 0 0.35em 0.9em;
      border-left: 3px solid #b7d1ff;
      color: #5b7594;
      background: rgba(22,119,255,0.04);
      border-radius: 0 8px 8px 0;
    }
    .message.assistant.markdown code {
      padding: 0.12em 0.35em;
      border-radius: 4px;
      background: rgba(22,119,255,0.08);
      font-family: 'SF Mono', 'Menlo', 'Monaco', monospace;
      font-size: 0.92em;
    }
    .message.assistant.markdown pre {
      margin: 0.85em 0;
      padding: 11px;
      border-radius: 9px;
      background: #fff;
      border: 1px solid var(--border);
      overflow-x: auto;
      white-space: pre;
      box-shadow: inset 0 0 0 1px rgba(22,119,255,0.03);
    }
    .message.assistant.markdown pre code {
      padding: 0;
      background: transparent;
      border-radius: 0;
      font-size: 12px;
    }
    .message.assistant.markdown table {
      display: block;
      width: 100%;
      margin: 0.85em 0;
      overflow-x: auto;
      border-collapse: collapse;
      font-size: 13px;
    }
    .message.assistant.markdown th,
    .message.assistant.markdown td {
      padding: 7px 9px;
      border: 1px solid var(--border);
      text-align: left;
      white-space: nowrap;
    }
    .message.assistant.markdown th { background: #eef5ff; }
    .message.assistant.markdown strong {
      color: #1f2f46;
      font-weight: 700;
    }
    .message.assistant.markdown hr {
      height: 1px;
      margin: 1em 0;
      border: 0;
      background: linear-gradient(90deg, transparent, #d9e6ff, transparent);
    }
    .message.assistant.markdown p:has(> strong:first-child) {
      padding: 8px 10px;
      border: 1px solid #d9e6ff;
      border-radius: 10px;
      background: #f8fbff;
    }
    .message.assistant.markdown a {
      color: var(--primary);
      text-decoration: none;
      font-weight: 600;
    }
    .message.assistant.markdown a:hover { text-decoration: underline; }

    .message.assistant.assistant-turn {
      width: min(86%, 780px);
      max-width: min(86%, 780px);
      padding: 0;
      overflow: hidden;
    }
    .assistant-content {
      padding: 10px 14px;
      min-height: 20px;
    }
    .assistant-content:empty {
      display: none;
    }

    .agent-action-panel {
      display: none;
      border-bottom: 1px solid #dce8fb;
      background: #fbfdff;
    }
    .agent-action-panel.active {
      display: block;
    }
    .agent-action-details {
      width: 100%;
    }
    .agent-action-summary {
      min-height: 34px;
      padding: 7px 11px;
      display: flex;
      align-items: center;
      gap: 8px;
      color: #475569;
      cursor: pointer;
      list-style: none;
      font-size: 12px;
      user-select: none;
    }
    .agent-action-summary::-webkit-details-marker {
      display: none;
    }
    .agent-task-dot {
      width: 8px;
      height: 8px;
      border-radius: 50%;
      background: #22c55e;
      flex: 0 0 auto;
    }
    .agent-action-panel.is-running .agent-task-dot {
      background: #1677ff;
      animation: statusPulse 1.2s ease-in-out infinite;
    }
    @keyframes statusPulse {
      0%, 100% { opacity: 0.45; transform: scale(0.9); }
      50% { opacity: 1; transform: scale(1.1); }
    }
    .agent-action-summary-text {
      flex: 1;
      min-width: 0;
      overflow: hidden;
      text-overflow: ellipsis;
      white-space: nowrap;
    }
    .agent-action-count {
      color: #64748b;
      font-family: 'SF Mono', 'Menlo', 'Monaco', monospace;
      font-size: 11px;
      flex-shrink: 0;
    }
    .agent-action-list {
      border-top: 1px solid #e7eefb;
      display: flex;
      flex-direction: column;
    }
    .agent-action-item {
      padding: 8px 11px;
      border-top: 1px solid #edf3fd;
      font-size: 12px;
      color: #334155;
    }
    .agent-action-item:first-child {
      border-top: 0;
    }
    .agent-action-main {
      display: grid;
      grid-template-columns: 58px minmax(0, 1fr) auto;
      gap: 8px;
      align-items: center;
      min-height: 22px;
    }
    .agent-action-kind {
      color: #1677ff;
      font-family: 'SF Mono', 'Menlo', 'Monaco', monospace;
      font-size: 11px;
      font-weight: 700;
      text-transform: uppercase;
    }
    .agent-action-label {
      overflow: hidden;
      text-overflow: ellipsis;
      white-space: nowrap;
    }
    .agent-action-state {
      font-size: 11px;
      color: #64748b;
      white-space: nowrap;
    }
    .agent-action-item.is-success .agent-action-state {
      color: #16a34a;
    }
    .agent-action-item.is-failed .agent-action-state {
      color: #cf1322;
    }
    .agent-action-thinking {
      display: grid;
      grid-template-columns: 58px minmax(0, 1fr);
      gap: 8px;
      align-items: start;
      color: #475569;
      line-height: 1.5;
    }
    .agent-action-thinking-kind {
      color: #8b5cf6;
      font-family: 'SF Mono', 'Menlo', 'Monaco', monospace;
      font-size: 11px;
      font-weight: 700;
    }
    .agent-action-thinking-text {
      min-width: 0;
      white-space: pre-wrap;
      word-break: break-word;
    }
    .agent-action-io {
      margin: 6px 0 0 66px;
      color: #64748b;
    }
    .agent-action-io summary {
      cursor: pointer;
      font-size: 12px;
    }
    .agent-action-io pre {
      margin: 6px 0 0;
      padding: 8px;
      background: #fff;
      border: 1px solid #e4edff;
      border-radius: 6px;
      color: #26384d;
      white-space: pre-wrap;
      word-break: break-word;
      max-height: 180px;
      overflow: auto;
      font-family: 'SF Mono', 'Menlo', 'Monaco', monospace;
      font-size: 11px;
    }

    .message.system {
      align-self: center;
      width: min(92%, 780px);
      max-width: min(92%, 780px);
      padding: 11px 13px;
      font-size: 13px;
      line-height: 1.58;
      color: var(--system-color);
      background: #fbfdff;
      border: 1px solid #dbe4ef;
      border-left: 3px solid #1677ff;
      border-radius: 8px;
      text-align: left;
      white-space: normal;
      box-shadow: 0 2px 8px rgba(15, 23, 42, 0.04);
    }
    .message.system.is-status {
      width: min(92%, 780px);
      max-width: min(92%, 780px);
      border-left-color: #22c55e;
      background: #f8fffb;
    }
    .system-lines {
      display: grid;
      gap: 3px;
    }
    .system-line {
      display: block;
      overflow-wrap: anywhere;
      word-break: break-word;
    }
    .system-line:first-child {
      color: #1f2f46;
      font-weight: 650;
    }
    .system-line.is-muted {
      color: #64748b;
    }
    .system-line.is-path,
    .system-line.is-command {
      padding: 2px 6px;
      border-radius: 5px;
      background: #eef5ff;
      color: #244266;
      font-family: 'SF Mono', 'Menlo', 'Monaco', Consolas, monospace;
      font-size: 12px;
      line-height: 1.55;
    }
    .presence-grid {
      display: grid;
      gap: 5px;
    }
    .presence-title {
      color: #1f2f46;
      font-weight: 650;
    }
    .presence-row {
      display: grid;
      grid-template-columns: 76px minmax(0, 1fr);
      gap: 8px;
      align-items: baseline;
      font-size: 12px;
    }
    .presence-label {
      color: #64748b;
    }
    .presence-value {
      overflow-wrap: anywhere;
      word-break: break-word;
      color: #26384d;
      font-family: 'SF Mono', 'Menlo', 'Monaco', Consolas, monospace;
    }

    .message.error {
      align-self: center;
      font-size: 12px;
      color: var(--danger);
      background: #fff2f0;
      border: 1px solid #ffccc7;
      border-radius: 8px;
      padding: 8px 14px;
    }

    .message.tool_call {
      align-self: center;
      font-size: 12px;
      background: #fffbe6;
      border: 1px solid #ffe58f;
      border-radius: 8px;
      padding: 8px 14px;
      color: #ad8b00;
      font-family: 'SF Mono', 'Menlo', 'Monaco', monospace;
    }

    .reasoning-card {
      align-self: flex-start;
      width: fit-content;
      min-width: 156px;
      max-width: min(88%, 640px);
      margin: 2px 0 -2px 0;
      border: 1px solid #d5e3f8;
      border-radius: 8px;
      background: #f8fbff;
      color: #334155;
      font-size: 12px;
      overflow: hidden;
      box-shadow: 0 2px 10px rgba(15, 23, 42, 0.06);
      animation: fadeIn 0.2s ease;
    }
    .reasoning-card.active {
      border-color: #9fc3ff;
      background: #f5f9ff;
    }
    .reasoning-card-header {
      width: 100%;
      padding: 6px 10px;
      border: 0;
      background: transparent;
      color: inherit;
      cursor: pointer;
      display: flex;
      align-items: center;
      gap: 8px;
      font: inherit;
      font-weight: 600;
      text-align: left;
    }
    .reasoning-card-toggle {
      width: 18px;
      height: 18px;
      border-radius: 50%;
      background: #e6f0ff;
      color: #1677ff;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      font-size: 11px;
      line-height: 1;
      transition: transform 0.18s ease;
      flex-shrink: 0;
    }
    .reasoning-card.collapsed .reasoning-card-toggle { transform: rotate(-90deg); }
    .reasoning-card-title {
      flex-shrink: 0;
      color: #1f2f46;
    }
    .reasoning-card-preview {
      flex: 1;
      color: #64748b;
      font-weight: 400;
      overflow: hidden;
      text-overflow: ellipsis;
      white-space: nowrap;
      min-width: 0;
    }
    .reasoning-card-badge {
      padding: 2px 7px;
      border-radius: 999px;
      background: #e6f0ff;
      color: #1677ff;
      font-size: 11px;
      font-weight: 500;
      flex-shrink: 0;
    }
    .reasoning-card-body {
      border-top: 1px solid rgba(22,119,255,0.12);
      padding: 9px 11px 10px;
      white-space: pre-wrap;
      word-break: break-word;
      line-height: 1.65;
      max-height: 96px;
      overflow: auto;
    }
    .reasoning-card.collapsed .reasoning-card-body { display: none; }

    .tool-card {
      align-self: flex-start;
      width: min(86%, 780px);
      margin: 4px 0 -2px 0;
      border: 1px solid #d9e6ff;
      border-radius: 12px;
      background: linear-gradient(180deg, #f8fbff 0%, #f3f7ff 100%);
      color: #244266;
      font-size: 12px;
      overflow: hidden;
      box-shadow: 0 3px 12px rgba(22, 119, 255, 0.08);
    }
    .tool-card.error {
      border-color: #ffccc7;
      background: linear-gradient(180deg, #fff7f6 0%, #fff2f0 100%);
      color: #a8071a;
    }
    .tool-card-header {
      width: 100%;
      cursor: pointer;
      padding: 9px 12px;
      font-weight: 600;
      user-select: none;
      display: flex;
      align-items: center;
      gap: 8px;
      border: 0;
      background: transparent;
      color: inherit;
      text-align: left;
      font: inherit;
    }
    .tool-card-toggle {
      width: 18px;
      height: 18px;
      border-radius: 50%;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      background: #e6f0ff;
      color: #1677ff;
      font-size: 16px;
      line-height: 1;
      transition: transform 0.18s ease;
      flex-shrink: 0;
    }
    .tool-card.collapsed .tool-card-toggle { transform: rotate(-90deg); }
    .tool-card.collapsed .tool-card-body { display: none; }
    .tool-card-summary-main {
      flex: 1;
      overflow: hidden;
      text-overflow: ellipsis;
      white-space: nowrap;
    }
    .tool-card-summary-badge {
      padding: 2px 7px;
      border-radius: 999px;
      background: #e6f0ff;
      color: #1677ff;
      font-size: 11px;
      font-weight: 500;
      flex-shrink: 0;
    }
    .tool-card.error .tool-card-summary-badge,
    .tool-card.error .tool-card-toggle {
      background: #fff1f0;
      color: #cf1322;
    }
    .tool-card-body {
      display: block;
    }
    .tool-section {
      border-top: 1px solid rgba(22,119,255,0.12);
      padding: 9px 12px 11px;
    }
    .tool-section-title {
      font-weight: 600;
      margin-bottom: 6px;
      color: #5b7594;
    }
    .tool-card.error .tool-section-title { color: #a8071a; }
    .tool-section pre {
      margin: 0;
      padding: 10px;
      background: rgba(255,255,255,0.85);
      border: 1px solid rgba(22,119,255,0.08);
      border-radius: 8px;
      white-space: pre-wrap;
      word-break: break-word;
      max-height: 260px;
      overflow: auto;
      font-family: 'SF Mono', 'Menlo', 'Monaco', monospace;
      color: #26384d;
    }

    .outgoing-card {
      align-self: flex-start;
      width: min(86%, 560px);
      padding: 12px;
      border: 1px solid #d9e6ff;
      border-radius: 12px;
      background: #f8fbff;
      box-shadow: 0 3px 12px rgba(22, 119, 255, 0.08);
      display: flex;
      gap: 12px;
      align-items: center;
      animation: fadeIn 0.2s ease;
    }
    .outgoing-card.error {
      border-color: #ffccc7;
      background: #fff2f0;
      color: #cf1322;
    }
    .outgoing-preview {
      width: 72px;
      height: 72px;
      border-radius: 10px;
      border: 1px solid var(--border);
      object-fit: cover;
      background: #fff;
      flex-shrink: 0;
    }
    .outgoing-icon {
      width: 46px;
      height: 46px;
      border-radius: 12px;
      background: #e6f0ff;
      color: #1677ff;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 22px;
      flex-shrink: 0;
    }
    .outgoing-info {
      min-width: 0;
      flex: 1;
      display: flex;
      flex-direction: column;
      gap: 4px;
      font-size: 12px;
      color: #5b7594;
    }
    .outgoing-name {
      font-size: 14px;
      color: #244266;
      font-weight: 600;
      overflow: hidden;
      text-overflow: ellipsis;
      white-space: nowrap;
    }
    .outgoing-actions {
      display: flex;
      gap: 8px;
      margin-top: 4px;
    }
    .outgoing-link {
      color: #1677ff;
      text-decoration: none;
      font-weight: 600;
    }
    .outgoing-link:hover { text-decoration: underline; }

    .message-actions {
      display: flex;
      flex-wrap: wrap;
      gap: 8px;
      margin-top: 10px;
    }
    .message-action-btn {
      border: 1px solid #c8d7ea;
      background: #f7fbff;
      color: #244266;
      border-radius: 6px;
      padding: 6px 10px;
      font-size: 12px;
      line-height: 1.2;
      cursor: pointer;
      max-width: 180px;
      overflow: hidden;
      text-overflow: ellipsis;
      white-space: nowrap;
    }
    .message-action-btn:hover {
      border-color: #1677ff;
      color: #0958d9;
      background: #eef6ff;
    }
    .message-action-btn:disabled {
      cursor: default;
      opacity: 0.55;
    }

    .slash-result {
      display: flex;
      flex-direction: column;
      gap: 10px;
      align-self: center;
      width: min(92%, 780px);
      max-width: min(92%, 780px);
      padding: 12px;
      color: #244266;
      background: #f8fafc;
      border: 1px solid #dbe4ef;
      border-left: 3px solid #1677ff;
      border-radius: 8px;
      font-size: 13px;
      line-height: 1.5;
    }
    .slash-result-header {
      display: flex;
      justify-content: space-between;
      gap: 12px;
      align-items: center;
      color: #1f2f46;
      font-weight: 650;
    }
    .slash-result-meta {
      color: #64748b;
      font-size: 12px;
      font-weight: 500;
      white-space: nowrap;
    }
    .slash-result-list,
    .history-rounds {
      display: flex;
      flex-direction: column;
      gap: 8px;
    }
    .slash-result-item,
    .history-round {
      border: 1px solid #dbe4ef;
      background: #fff;
      border-radius: 8px;
      padding: 10px;
      min-width: 0;
    }
    .slash-result-title {
      color: #1f2f46;
      font-weight: 650;
      overflow-wrap: anywhere;
    }
    .slash-result-subtitle,
    .history-role {
      color: #64748b;
      font-size: 12px;
      margin-top: 3px;
      overflow-wrap: anywhere;
    }
    .history-block + .history-block {
      margin-top: 8px;
    }
    .history-role {
      margin-bottom: 3px;
      font-weight: 650;
      text-transform: uppercase;
    }
    .history-text {
      white-space: pre-wrap;
      overflow-wrap: anywhere;
      color: #244266;
    }

    .message.user img {
      max-width: 180px;
      border-radius: 8px;
      margin-top: 6px;
      display: block;
      border: 1px solid rgba(255,255,255,0.35);
    }

    .file-list {
      margin-top: 6px;
      display: flex;
      flex-direction: column;
      gap: 4px;
      font-size: 12px;
      opacity: 0.95;
    }

    .danger-confirm {
      align-self: center;
      background: #fff2f0;
      border: 2px solid #ff4d4f;
      border-radius: 10px;
      padding: 14px 18px;
      max-width: 90%;
    }
    .danger-confirm .danger-text {
      color: #cf1322;
      font-size: 13px;
      margin-bottom: 10px;
      white-space: pre-wrap;
    }
    .danger-confirm .danger-buttons { display: flex; gap: 10px; justify-content: flex-end; }
    .danger-confirm button {
      padding: 6px 16px; border-radius: 6px; border: none;
      cursor: pointer; font-size: 13px; font-weight: 500;
    }
    .btn-approve { background: #ff4d4f; color: #fff; }
    .btn-approve:hover { background: #cf1322; }
    .btn-deny { background: #f5f5f5; color: #666; border: 1px solid #d9d9d9; }
    .btn-deny:hover { background: #e8e8e8; }
    .permission-confirm {
      background: #eef6ff;
      border-color: #1677ff;
    }
    .permission-confirm .danger-text { color: #0958d9; }
    .permission-confirm .btn-approve { background: #1677ff; }
    .permission-confirm .btn-approve:hover { background: #0958d9; }

    #attachment-bar {
      display: none;
      padding: 8px 10px 0;
      gap: 8px;
      align-items: center;
      flex-wrap: wrap;
    }
    #attachment-bar.active { display: flex; }
    .attachment-chip {
      display: flex;
      align-items: center;
      gap: 8px;
      padding: 6px 8px;
      background: #f8fafc;
      border: 1px solid var(--border);
      border-radius: 8px;
      max-width: 260px;
      font-size: 12px;
      color: #555;
    }
    .attachment-chip img {
      width: 36px;
      height: 36px;
      border-radius: 6px;
      object-fit: cover;
      border: 1px solid var(--border);
      flex-shrink: 0;
    }
    .attachment-name {
      overflow: hidden;
      text-overflow: ellipsis;
      white-space: nowrap;
    }
    .remove-btn {
      background: none;
      border: none;
      color: var(--danger);
      cursor: pointer;
      font-size: 14px;
      padding: 4px;
      flex-shrink: 0;
    }

    #input-area {
      display: grid;
      grid-template-columns: 44px minmax(0, 1fr) auto;
      width: 100%;
      padding: 10px;
      gap: 10px;
      flex-shrink: 0;
      align-items: flex-end;
    }

    #composer-shell {
      flex-shrink: 0;
      border-top: 1px solid #dbe4ef;
      background: rgba(248,250,252,0.98);
      box-shadow: 0 -10px 24px rgba(15, 23, 42, 0.06);
      padding: 0 max(0px, env(safe-area-inset-right)) max(0px, env(safe-area-inset-bottom)) max(0px, env(safe-area-inset-left));
      z-index: 5;
    }

    #input {
      flex: 1;
      width: 100%;
      min-height: 48px;
      padding: 12px 14px;
      border: 1px solid #cbd5e1;
      border-radius: 8px;
      outline: none;
      font-size: 14px;
      resize: none;
      font-family: inherit;
      transition: border-color 0.2s;
      max-height: 160px;
      color: #172033;
      background: #fff;
      line-height: 1.45;
      overflow-y: auto;
    }
    #input:focus { border-color: var(--primary); box-shadow: 0 0 0 2px rgba(22,119,255,0.1); }

    .icon-btn {
      width: 44px;
      height: 44px;
      border: none;
      border-radius: 8px;
      cursor: pointer;
      font-size: 17px;
      display: flex;
      align-items: center;
      justify-content: center;
      transition: background 0.2s;
      flex-shrink: 0;
    }

    #upload-btn { background: #f5f5f5; color: #666; }
    #upload-btn:hover { background: #e8e8e8; }

    #send-btn {
      min-width: 74px;
      min-height: 44px;
      padding: 0 18px;
      background: var(--primary);
      color: #fff;
      border: none;
      border-radius: 8px;
      cursor: pointer;
      font-size: 14px;
      font-weight: 500;
      white-space: nowrap;
      transition: background 0.2s;
    }
    #send-btn:hover { background: var(--primary-hover); }
    #send-btn.is-stop { background: var(--danger); }
    #send-btn.is-stop:hover { background: #d9363e; }
    #send-btn:disabled { opacity: 0.5; cursor: not-allowed; background: #bbb; }

    #scroll-bottom-btn {
      position: fixed;
      right: max(14px, calc((100vw - 1120px) / 2 + 18px));
      bottom: calc(var(--composer-height) + 18px);
      min-width: 44px;
      min-height: 38px;
      padding: 0 13px;
      border: 1px solid #bfdbfe;
      border-radius: 999px;
      background: #ffffff;
      color: #0958d9;
      box-shadow: 0 8px 22px rgba(15, 23, 42, 0.16);
      cursor: pointer;
      font-size: 13px;
      font-weight: 650;
      z-index: 8;
      display: none;
      align-items: center;
      justify-content: center;
    }
    #scroll-bottom-btn.visible {
      display: inline-flex;
    }

    @media (max-width: 640px) {
      .message,
      .message.assistant.assistant-turn,
      .tool-card,
      .outgoing-card,
      .slash-result,
      .message.system,
      .message.system.is-status {
        width: 100%;
        max-width: 100%;
      }

      .message.user {
        width: auto;
        max-width: 92%;
      }

      .presence-row {
        grid-template-columns: 64px minmax(0, 1fr);
      }

      #composer-shell {
        position: sticky;
        bottom: 0;
        box-shadow: 0 -8px 20px rgba(15, 23, 42, 0.08);
      }

      #input-area {
        grid-template-columns: 44px minmax(0, 1fr) 64px;
        gap: 8px;
        padding: 8px;
      }

      #input {
        min-height: 44px;
        max-height: 132px;
        padding: 10px 12px;
        font-size: 14px;
      }

      #send-btn {
        min-width: 64px;
        padding: 0 12px;
      }

      #scroll-bottom-btn {
        right: 12px;
        bottom: calc(var(--composer-height) + 12px);
      }
    }

    @media (prefers-reduced-motion: reduce) {
      *,
      *::before,
      *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        scroll-behavior: auto !important;
        transition-duration: 0.01ms !important;
      }
    }