:root {
      --bg: #F6F6F6;
      --bg-raised: #FFFFFF;
      --bg-card: #FFFFFF;
      --bg-card-hover: #F9FAFB;
      --bg-input: #FFFFFF;
      --border: #E5E7EB;
      --border-focus: #2D3F86;
      --text: #5E5E5E;
      --text-dim: #6B7280;
      --text-bright: #2D3F86;
      --accent: #2D3F86;
      --accent-dim: rgba(45,63,134,0.1);
      --accent-glow: rgba(45,63,134,0.05);
      --green: #16a34a;
      --green-bg: rgba(22,163,74,0.08);
      --green-border: rgba(22,163,74,0.2);
      --red: #E85036;
      --red-bg: rgba(232,80,54,0.08);
      --blue: #2D3F86;
      --blue-bg: rgba(45,63,134,0.08);
      --blue-border: rgba(45,63,134,0.15);
      --amber-bg: rgba(232,80,54,0.08);
      --amber-border: rgba(232,80,54,0.2);
      --slate: #9CA3AF;
      --font-display: 'Poppins', system-ui, sans-serif;
      --font-body: 'Poppins', system-ui, sans-serif;
      --font-mono: 'Menlo', 'Consolas', monospace;
      --radius: 6px;
      --radius-lg: 10px;
      --rt-h-tree-header: 48px;
      --rt-h-panel-header: 42px;
      --rt-h-subpart-header: 40px;
    }

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

    body {
      font-family: var(--font-body);
      background: var(--bg);
      color: var(--text);
      font-size: 13.5px;
      line-height: 1.5;
      -webkit-font-smoothing: antialiased;
    }


    a { color: var(--accent); text-decoration: none; transition: color 0.15s; }
    a:hover { color: #E85036; }

    ::selection { background: var(--accent-dim); color: var(--text-bright); }

    /* ── Header ── */
    .header {
      background: rgba(255,255,255,0.95);
      border-bottom: 1px solid var(--border);
      padding: 0 28px;
      display: flex;
      align-items: center;
      height: 52px;
      gap: 24px;
      position: sticky;
      top: 0;
      z-index: 50;
      backdrop-filter: blur(12px);
    }
    .header-brand {
      display: flex;
      align-items: center;
      gap: 10px;
    }
    .header-brand svg { flex-shrink: 0; }
    .header h1 {
      font-family: var(--font-display);
      font-size: 16px;
      font-weight: 500;
      color: var(--text-bright);
      letter-spacing: -0.01em;
    }
    .header h1 span { color: var(--accent); font-weight: 700; }
    .header nav { display: flex; gap: 20px; margin-left: auto; align-items: center; }
    .header nav a {
      color: var(--text-dim);
      font-size: 12px;
      font-weight: 500;
      letter-spacing: 0.04em;
      text-transform: uppercase;
      padding: 4px 0;
      border-bottom: 1.5px solid transparent;
      transition: all 0.2s;
    }
    .header nav a:hover { color: var(--text); border-bottom-color: #E85036; text-decoration: none; }
    .header nav #authSignInBtn {
      font-size: 16px;
      font-weight: 700;
      color: var(--accent);
      text-transform: none;
      letter-spacing: normal;
      border-bottom: none;
    }
    .header nav #authSignInBtn:hover { color: var(--accent); text-decoration: underline; border-bottom: none; }

    .container {
      max-width: 1800px; margin: 0 auto; padding: 20px 28px 60px;
      display: grid; grid-template-columns: 1fr 1fr; gap: 24px;
    }
    .left-column { min-width: 0; }
    .right-column {
      position: sticky; top: 72px; max-height: calc(100vh - 92px);
      overflow-y: auto; background: var(--bg-raised); border: 1px solid var(--border);
      border-radius: var(--radius-lg); padding: 0;
    }
    .right-column::-webkit-scrollbar { width: 6px; }
    .right-column::-webkit-scrollbar-thumb { background: var(--border); border-radius: 3px; }
    @media (max-width: 1200px) {
      .container { grid-template-columns: 1fr; }
      .right-column { position: static; max-height: none; }
      .reg-tree-header, .rt-panel-header, .rt-subpart-header, .rt-reg-header, .rt-pc-row { position: static; }
    }

    /* ── Regulation Tree ── */
    .reg-tree-header {
      padding: 14px 16px; border-bottom: 1px solid var(--border);
      display: flex; align-items: center; gap: 10px; position: sticky; top: 0;
      background: var(--bg-raised); z-index: 5;
    }
    .reg-tree-header h2 {
      font-family: var(--font-display); font-size: 14px; font-weight: 500;
      color: var(--text-bright); flex: 1; white-space: nowrap;
    }
    .reg-tree-header select {
      padding: 5px 8px; border: 1px solid var(--border); border-radius: var(--radius);
      font-family: var(--font-body); font-size: 12px; color: var(--text);
      background: var(--bg-input); cursor: pointer; max-width: 200px;
    }
    .rt-search {
      padding: 5px 10px; border: 1px solid var(--border); border-radius: var(--radius);
      font-family: var(--font-body); font-size: 12px; color: var(--text);
      background: var(--bg-input); width: 220px; transition: border-color 0.15s;
    }
    .rt-search:focus { outline: none; border-color: var(--accent); }
    .rt-search::placeholder { color: var(--text-dim); }
    .rt-search-group { display: flex; flex-direction: column; gap: 6px; }
    .rt-search-tabs { display: flex; gap: 2px; }
    .rt-search-tab {
      padding: 3px 10px; border: 1px solid var(--border); border-radius: var(--radius);
      font-family: var(--font-body); font-size: 11px; color: var(--text-dim);
      background: var(--bg-input); cursor: pointer; transition: all 0.15s;
    }
    .rt-search-tab:hover { color: var(--text); border-color: var(--accent); }
    .rt-search-tab.active { background: var(--accent); color: #fff; border-color: var(--accent); }
    .rt-ident-results { padding: 8px 0; overflow-y: auto; max-height: calc(100vh - 140px); }
    .rt-ident-result {
      padding: 8px 16px; cursor: pointer; border-bottom: 1px solid var(--border);
      transition: background 0.1s;
    }
    .rt-ident-result:hover { background: var(--bg-input); }
    .rt-ident-result-reg { font-size: 12px; font-weight: 600; color: var(--accent); }
    .rt-ident-result-name { font-size: 12px; color: var(--text); margin-left: 6px; }
    .rt-ident-result-panel { font-size: 9px; padding: 1px 6px; border-radius: 3px; background: var(--bg-input); color: var(--text-dim); margin-left: 6px; font-family: var(--font-mono); }
    .rt-ident-result-snippet { font-size: 11px; color: var(--text-dim); line-height: 1.5; margin-top: 4px; }
    .rt-ident-result-snippet mark { background: #fff3b0; color: var(--text); padding: 0 1px; border-radius: 2px; }
    .rt-ident-no-results { text-align: center; padding: 32px 16px; color: var(--text-dim); font-style: italic; font-size: 13px; }
    .reg-tree-body { padding: 8px 0; }
    .reg-tree-loading { text-align: center; padding: 32px 16px; color: var(--text-dim); font-style: italic; font-size: 13px; }

    .reg-tree-panel-info {
      padding: 8px 16px; font-size: 11px; color: var(--text-dim);
      border-bottom: 1px solid var(--border); display: flex; gap: 8px; align-items: center;
    }
    .reg-tree-panel-info .cfr-ref {
      font-family: var(--font-mono); font-size: 10.5px; color: var(--accent);
      background: var(--accent-dim); padding: 1px 6px; border-radius: 3px;
    }

    /* Panel-level (top of tree) */
    .rt-panel { border-bottom: 1px solid var(--border); }
    .rt-panel-header {
      padding: 10px 16px; display: flex; align-items: center; gap: 8px;
      cursor: pointer; user-select: none; transition: background 0.15s;
      position: sticky; top: var(--rt-h-tree-header); z-index: 4;
      background: var(--bg-raised);
    }
    .rt-panel-header:hover { background: var(--bg-card-hover); }
    .rt-panel.active > .rt-panel-header { background: #E85036; color: #fff; }
    .rt-panel.active > .rt-panel-header .rt-panel-chevron { color: #fff; }
    .rt-panel.active > .rt-panel-header .rt-panel-label { color: #fff; }
    .rt-panel.active > .rt-panel-header .rt-panel-cfr { color: rgba(255,255,255,0.7); background: rgba(255,255,255,0.15); border-color: rgba(255,255,255,0.2); }
    .rt-panel-chevron {
      width: 14px; height: 14px; color: #E85036; transition: transform 0.2s; flex-shrink: 0;
    }
    .rt-panel.collapsed .rt-panel-chevron { transform: rotate(-90deg); }
    .rt-panel-label { font-size: 13px; font-weight: 600; color: var(--text-bright); flex: 1; }
    .rt-panel-cfr {
      font-family: var(--font-mono); font-size: 10px; color: var(--text-dim);
      background: var(--bg); padding: 1px 6px; border-radius: 3px; border: 1px solid var(--border);
    }
    .rt-panel.collapsed .rt-panel-body { display: none; }
    .rt-panel-body { padding: 0; }

    .rt-subpart {
      border-bottom: 1px solid var(--border);
    }
    .rt-subpart-header {
      padding: 10px 16px; display: flex; align-items: center; gap: 8px;
      cursor: pointer; user-select: none; transition: background 0.15s;
      position: sticky; top: calc(var(--rt-h-tree-header) + var(--rt-h-panel-header)); z-index: 3;
      background: var(--bg-raised);
    }
    .rt-subpart-header:hover { background: var(--bg-card-hover); }
    .rt-subpart-chevron {
      width: 14px; height: 14px; color: var(--text-dim); transition: transform 0.2s;
      flex-shrink: 0;
    }
    .rt-subpart.collapsed .rt-subpart-chevron { transform: rotate(-90deg); }
    .rt-subpart-label {
      font-size: 12px; font-weight: 600; color: var(--text-bright); flex: 1;
    }
    .rt-subpart-range {
      font-family: var(--font-mono); font-size: 10px; color: var(--text-dim);
    }
    .rt-subpart-count {
      font-family: var(--font-mono); font-size: 10px; color: var(--text-dim);
      background: var(--bg); padding: 1px 6px; border-radius: 3px; border: 1px solid var(--border);
    }
    .rt-subpart.collapsed .rt-subpart-body { display: none; }
    .rt-subpart-body { padding: 0; }

    .rt-reg {
      border-top: 1px solid var(--border);
    }
    .rt-reg-header {
      padding: 8px 16px 8px 32px; display: flex; align-items: flex-start; gap: 8px;
      cursor: pointer; user-select: none; transition: background 0.15s;
      position: sticky; top: calc(var(--rt-h-tree-header) + var(--rt-h-panel-header) + var(--rt-h-subpart-header)); z-index: 2;
      background: var(--bg-raised);
    }
    .rt-reg-header:hover { background: var(--accent-glow); }
    .rt-reg-chevron {
      width: 12px; height: 12px; color: var(--text-dim); transition: transform 0.2s;
      flex-shrink: 0; margin-top: 2px;
    }
    .rt-reg.collapsed .rt-reg-chevron { transform: rotate(-90deg); }
    .rt-reg-ref {
      font-family: var(--font-mono); font-size: 11px; color: var(--accent);
      white-space: nowrap; flex-shrink: 0;
    }
    .rt-reg-name {
      font-size: 12px; color: var(--text); flex: 1;
      overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
    }
    .rt-reg-class {
      font-family: var(--font-mono); font-size: 10px; font-weight: 600;
      padding: 1px 5px; border-radius: 3px; white-space: nowrap; flex-shrink: 0;
    }
    .rt-reg-class-1 { background: var(--green-bg); color: var(--green); border: 1px solid var(--green-border); }
    .rt-reg-class-2 { background: var(--blue-bg); color: var(--blue); border: 1px solid var(--blue-border); }
    .rt-reg-class-3 { background: var(--red-bg); color: var(--red); border: 1px solid var(--amber-border); }
    .rt-pc-count {
      font-family: var(--font-mono); font-size: 10px; color: var(--text-dim);
      background: var(--bg); border: 1px solid var(--border); border-radius: 3px;
      padding: 0 5px; white-space: nowrap; flex-shrink: 0;
    }
    .rt-pc-list { display: none; padding: 0 0 0 28px; }
    .rt-reg:not(.collapsed) > .rt-pc-list { display: block; }
    .rt-pc { border-bottom: 1px solid var(--bg); }
    .rt-pc-row {
      display: flex; align-items: center; gap: 8px;
      padding: 5px 12px; font-size: 11.5px; cursor: pointer; user-select: none;
      position: sticky; top: calc(var(--rt-h-tree-header) + var(--rt-h-panel-header) + var(--rt-h-subpart-header) + 36px); z-index: 1;
      background: var(--bg-raised);
    }
    .rt-pc-row:hover { background: var(--bg-card-hover); }
    .rt-pc-chevron { width: 12px; height: 12px; color: var(--text-dim); transition: transform 0.2s; flex-shrink: 0; }
    .rt-pc.collapsed .rt-pc-chevron { transform: rotate(-90deg); }
    .rt-pc-code { font-family: var(--font-mono); font-weight: 600; color: var(--accent); min-width: 36px; }
    .rt-pc-name { color: var(--text); flex: 1; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
    .rt-pc-devices { display: none; padding: 0 0 0 24px; }
    .rt-pc:not(.collapsed) > .rt-pc-devices { display: block; }
    .rt-pc-device {
      display: flex; align-items: center; gap: 8px;
      padding: 3px 12px; font-size: 11px; border-bottom: 1px solid var(--bg);
    }
    .rt-pc-device-id { font-family: var(--font-mono); font-weight: 500; color: var(--accent); min-width: 72px; font-size: 10.5px; }
    .rt-pc-device-name { color: var(--text); flex: 1; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
    .rt-pc-device-meta { font-size: 10px; color: var(--text-dim); white-space: nowrap; }
    .rt-reg.collapsed .rt-reg-body { display: none; }
    .rt-reg-body { padding: 0; }

    .rt-sc-toggle {
      font-size: 10.5px; font-weight: 600; color: var(--accent); cursor: pointer;
      text-transform: uppercase; letter-spacing: 0.04em; padding: 4px 0;
      display: inline-flex; align-items: center; gap: 4px;
    }
    .rt-sc-toggle:hover { color: #E85036; }
    .rt-sc-body { display: none; margin-top: 6px; }
    .rt-sc-body.open { display: block; }
    .rt-sc-items { list-style: none; padding: 0; }
    .rt-sc-items li {
      padding: 6px 10px; margin-bottom: 3px; background: var(--bg);
      border: 1px solid var(--border); border-left: 2px solid var(--accent);
      border-radius: var(--radius); font-size: 11.5px; line-height: 1.5; color: var(--text);
    }
    .rt-sc-text {
      font-size: 11.5px; line-height: 1.5; color: var(--text);
      white-space: pre-wrap; word-break: break-word;
      background: var(--bg); border: 1px solid var(--border); border-radius: var(--radius);
      padding: 8px 10px; margin-top: 4px;
    }
    .rt-ecfr-btn {
      font-size: 10px; font-weight: 600; color: var(--text-dim);
      border: 1px solid var(--border); border-radius: 3px; padding: 1px 6px;
      cursor: pointer; text-transform: uppercase; letter-spacing: 0.03em;
      background: none; transition: all 0.15s; margin-top: 6px; display: inline-block;
    }
    .rt-ecfr-btn:hover { color: var(--accent); border-color: var(--accent); background: var(--accent-dim); }

    /* Product code nodes (under regulation) */
    .rt-pc { border-top: 1px solid var(--border); }
    .rt-pc-header {
      padding: 7px 16px 7px 44px; display: flex; align-items: center; gap: 8px;
      cursor: pointer; user-select: none; transition: background 0.15s;
    }
    .rt-pc-header:hover { background: var(--accent-glow); }
    .rt-pc.active > .rt-pc-header { background: #E85036; color: #fff; }
    .rt-pc.active > .rt-pc-header .rt-pc-chevron { color: #fff; }
    .rt-pc.active > .rt-pc-header .rt-pc-code { color: #fff; }
    .rt-pc.active > .rt-pc-header .rt-pc-name { color: rgba(255,255,255,0.9); }
    .rt-pc.active > .rt-pc-header .rt-pc-class { background: rgba(255,255,255,0.15); color: #fff; border-color: rgba(255,255,255,0.2); }
    .rt-pc.active > .rt-pc-header .rt-pc-type-label { color: rgba(255,255,255,0.7); }
    .rt-pc-chevron {
      width: 12px; height: 12px; color: #E85036; transition: transform 0.2s; flex-shrink: 0;
    }
    .rt-pc.collapsed .rt-pc-chevron { transform: rotate(-90deg); }
    .rt-pc-code {
      font-family: var(--font-mono); font-size: 12px; font-weight: 700; color: #E85036;
      white-space: nowrap; flex-shrink: 0;
    }
    .rt-pc-name {
      font-size: 12px; color: var(--text); flex: 1;
      overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
    }
    .rt-pc-class {
      font-family: var(--font-mono); font-size: 10px; font-weight: 600;
      padding: 1px 5px; border-radius: 3px; white-space: nowrap; flex-shrink: 0;
    }
    .rt-pc-type-label {
      font-size: 10px; color: var(--text-dim); white-space: nowrap; flex-shrink: 0;
    }
    .rt-pc.collapsed .rt-pc-body { display: none; }
    .rt-pc-body { padding: 0; }

    /* Device rows under regulation */
    .rt-device {
      padding: 5px 16px 5px 44px; display: flex; align-items: center; gap: 8px;
      border-top: 1px solid var(--border); font-size: 11.5px; transition: background 0.1s;
    }
    .rt-device:hover { background: var(--accent-glow); }
    .rt-device-id {
      font-family: var(--font-mono); font-size: 11px; color: var(--accent);
      white-space: nowrap; cursor: pointer; flex-shrink: 0;
    }
    .rt-device-id:hover { text-decoration: underline; }
    .rt-device-name { color: var(--text); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; flex: 1; min-width: 0; }
    .rt-device-type {
      font-size: 10px; color: var(--text-dim); white-space: nowrap; flex-shrink: 0;
    }
    .rt-show-all {
      padding: 8px 16px 8px 44px; display: flex; align-items: center; gap: 6px;
      border-top: 1px solid var(--border); cursor: pointer; transition: background 0.15s;
    }
    .rt-show-all:hover { background: var(--accent-glow); }
    .rt-show-all-icon { color: #E85036; font-size: 14px; }
    .rt-show-all-label { font-size: 11.5px; font-weight: 600; color: #E85036; }

    /* Regulation detail section */
    .rt-detail { padding: 10px 16px 10px 44px; border-top: 1px solid var(--border); }
    .rt-detail-definition {
      font-size: 12px; line-height: 1.6; color: var(--text); margin-bottom: 8px;
      background: var(--bg); border: 1px solid var(--border); border-radius: var(--radius);
      padding: 8px 10px;
    }
    .rt-detail-flags { display: flex; flex-wrap: wrap; gap: 5px; margin-bottom: 8px; }
    .rt-flag {
      display: inline-flex; align-items: center; gap: 3px; padding: 2px 8px;
      border-radius: 3px; font-size: 10px; font-weight: 600; letter-spacing: 0.02em;
    }
    .rt-flag-yes { background: var(--green-bg); color: var(--green); border: 1px solid var(--green-border); }
    .rt-flag-no { background: var(--bg); color: var(--text-dim); border: 1px solid var(--border); }
    .rt-detail-meta {
      display: grid; grid-template-columns: auto 1fr; gap: 2px 10px; font-size: 11px; margin-bottom: 8px;
    }
    .rt-detail-meta dt { color: var(--text-dim); font-weight: 500; white-space: nowrap; }
    .rt-detail-meta dd { color: var(--text); margin: 0; }
    .rt-detail-section-label {
      font-size: 10.5px; font-weight: 600; color: var(--accent); text-transform: uppercase;
      letter-spacing: 0.04em; margin: 8px 0 4px; cursor: pointer;
      display: inline-flex; align-items: center; gap: 4px;
    }
    .rt-detail-section-label:hover { color: #E85036; }
    .rt-ecfr-inline {
      font-size: 12px; line-height: 1.6; color: var(--text); white-space: pre-wrap; word-break: break-word;
      background: var(--bg); border: 1px solid var(--border); border-radius: var(--radius);
      padding: 8px 10px; max-height: 300px; overflow-y: auto; margin-bottom: 8px;
    }

    /* ── Filter Panel ── */
    .filter-panel {
      background: var(--bg-raised);
      border: 1px solid var(--border);
      border-radius: var(--radius-lg);
      margin-bottom: 20px;
      overflow: hidden;
      transition: border-color 0.2s;
    }
    .filter-panel:focus-within { border-color: var(--border-focus); }

    .filter-header {
      padding: 14px 20px;
      display: flex;
      align-items: center;
      gap: 10px;
      cursor: pointer;
      user-select: none;
      border-bottom: 1px solid transparent;
      transition: border-color 0.2s;
    }
    .filter-panel:not(.collapsed) .filter-header { border-bottom-color: var(--border); }

    .filter-header h2 {
      font-family: var(--font-display);
      font-size: 14px;
      font-weight: 500;
      color: var(--text-bright);
      flex: 1;
    }
    .filter-toggle {
      width: 20px; height: 20px;
      display: flex; align-items: center; justify-content: center;
      color: var(--text-dim);
      transition: transform 0.25s ease;
    }
    .filter-panel.collapsed .filter-toggle { transform: rotate(-90deg); }
    .filter-panel.collapsed .filter-body { display: none; }

    .filter-body { padding: 16px 20px 18px; }

    .search-everything {
      width: 100%;
      padding: 11px 14px 11px 38px;
      background: var(--bg-input);
      border: 1px solid var(--border);
      border-radius: var(--radius);
      color: var(--text-bright);
      font-family: var(--font-body);
      font-size: 14px;
      transition: all 0.2s;
      margin-bottom: 14px;
    }
    .search-everything::placeholder { color: #C0C5CC; font-style: italic; }
    .search-everything:focus { outline: none; border-color: var(--accent); box-shadow: 0 0 0 3px var(--accent-dim); }
    .search-wrap { position: relative; margin-bottom: 14px; }
    .search-wrap svg {
      position: absolute; left: 12px; top: 50%; transform: translateY(-50%);
      color: var(--text-dim); pointer-events: none;
    }
    .search-wrap .search-everything { margin-bottom: 0; }

    .filter-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 10px;
      margin-bottom: 14px;
    }
    .filter-grid label {
      display: flex;
      flex-direction: column;
      gap: 4px;
      font-size: 11px;
      font-weight: 500;
      color: var(--text-dim);
      letter-spacing: 0.03em;
      text-transform: uppercase;
    }
    .filter-grid input, .filter-grid select {
      padding: 7px 10px;
      background: var(--bg-input);
      border: 1px solid var(--border);
      border-radius: var(--radius);
      color: var(--text);
      font-family: var(--font-body);
      font-size: 13px;
      transition: border-color 0.15s, box-shadow 0.15s;
    }
    .filter-grid input::placeholder { color: #C0C5CC; font-style: italic; }
    .filter-grid input:focus, .filter-grid select:focus { outline: none; border-color: var(--accent); box-shadow: 0 0 0 3px var(--accent-dim); }
    .filter-grid input.has-value, .filter-grid select.has-value {
      border-color: var(--accent);
      box-shadow: 0 0 0 2px var(--accent-dim);
    }
    @keyframes filter-pulse {
      0% { box-shadow: 0 0 0 2px var(--accent-dim); }
      40% { box-shadow: 0 0 0 5px rgba(45,63,134,0.25); }
      100% { box-shadow: 0 0 0 2px var(--accent-dim); }
    }
    .filter-pulse { animation: filter-pulse 0.5s ease-out; }
    .filter-grid select { cursor: pointer; }
    .filter-grid select option { background: var(--bg-raised); }

    .filter-divider {
      height: 1px;
      background: var(--border);
      margin: 4px 0 14px;
    }

    .checkbox-row { display: flex; flex-wrap: wrap; gap: 6px; margin-bottom: 14px; }
    .cb-toggle {
      display: flex; align-items: center; gap: 7px;
      padding: 5px 12px;
      background: var(--bg-input);
      border: 1px solid var(--border);
      border-radius: 20px;
      cursor: pointer;
      font-size: 12px;
      font-weight: 500;
      color: var(--text-dim);
      transition: all 0.2s;
      white-space: nowrap;
      user-select: none;
    }
    .cb-toggle:hover { border-color: var(--text-dim); color: var(--text); }
    .cb-toggle input { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0,0,0,0); border: 0; }
    .cb-toggle.active {
      background: var(--accent-dim);
      border-color: var(--accent);
      color: var(--accent);
    }
    .cb-dot {
      width: 6px; height: 6px; border-radius: 50%;
      background: var(--text-dim);
      transition: background 0.2s;
    }
    .cb-toggle.active .cb-dot { background: var(--accent); }

    .filter-actions {
      display: flex;
      align-items: center;
      gap: 12px;
    }
    .sort-row { display: flex; gap: 8px; align-items: center; }
    .sort-row label { font-size: 11px; font-weight: 500; color: var(--text-dim); text-transform: uppercase; letter-spacing: 0.03em; }
    .sort-row select {
      padding: 6px 10px;
      background: var(--bg-input);
      border: 1px solid var(--border);
      border-radius: var(--radius);
      color: var(--text);
      font-family: var(--font-body);
      font-size: 12px;
      cursor: pointer;
    }
    .sort-row select:focus { outline: none; border-color: var(--accent); }
    .sort-row select option { background: var(--bg-raised); }

    .btn {
      padding: 7px 18px;
      border: 1px solid var(--border);
      border-radius: var(--radius);
      background: var(--bg-input);
      color: var(--text);
      font-family: var(--font-body);
      font-size: 12px;
      font-weight: 600;
      cursor: pointer;
      transition: all 0.15s;
      letter-spacing: 0.02em;
    }
    .btn:hover { border-color: var(--text-dim); color: var(--text-bright); }
    .btn:disabled { opacity: 0.4; cursor: not-allowed; }
    .btn-primary {
      background: var(--accent);
      border-color: var(--accent);
      color: #FFFFFF;
    }
    .btn-primary:hover { background: #E85036; border-color: #E85036; color: #FFFFFF; }

    /* ── Results Header ── */
    .results-bar {
      display: flex;
      justify-content: space-between;
      align-items: baseline;
      margin-bottom: 16px;
      padding: 0 2px;
    }
    .results-bar h2 {
      font-family: var(--font-display);
      font-size: 20px;
      font-weight: 300;
      color: var(--text-bright);
      letter-spacing: -0.02em;
    }
    .results-bar h2 strong {
      font-weight: 700;
      color: var(--accent);
      font-variant-numeric: tabular-nums;
    }
    .results-bar .meta {
      font-size: 12px;
      color: var(--text-dim);
      font-variant-numeric: tabular-nums;
    }

    /* ── Result Cards ── */
    .card {
      background: var(--bg-card);
      border: 1px solid var(--border);
      border-left: 3px solid var(--border);
      border-radius: var(--radius);
      margin-bottom: 8px;
      overflow: hidden;
      transition: all 0.2s ease;
      animation: cardIn 0.3s ease both;
      box-shadow: 0 1px 3px rgba(0,0,0,0.06);
    }
    .card:hover { border-left-color: var(--accent); background: var(--bg-card-hover); box-shadow: 0 2px 8px rgba(0,0,0,0.1); }

    @keyframes cardIn {
      from { opacity: 0; transform: translateY(6px); }
      to { opacity: 1; transform: translateY(0); }
    }

    .card-header {
      padding: 12px 16px 8px;
      display: grid;
      grid-template-columns: auto 1fr auto auto;
      gap: 6px 14px;
      align-items: baseline;
      cursor: pointer;
    }
    .card-id {
      font-family: var(--font-mono);
      font-weight: 500;
      font-size: 13px;
      color: var(--accent);
    }
    .card-name {
      font-weight: 600;
      font-size: 13.5px;
      color: var(--text-bright);
      white-space: nowrap;
      overflow: hidden;
      text-overflow: ellipsis;
    }
    .card-applicant {
      font-size: 12px;
      color: var(--text-dim);
      white-space: nowrap;
    }
    .card-date {
      font-family: var(--font-mono);
      font-size: 11px;
      color: var(--text-dim);
      white-space: nowrap;
    }
    .card-date .days-ago { color: var(--slate); }

    .card-meta {
      padding: 0 16px 10px;
      display: flex;
      flex-wrap: wrap;
      gap: 5px;
      align-items: center;
    }
    .btn-fda {
      margin-left: auto;
      padding: 2px 10px;
      font-size: 10.5px;
      font-weight: 600;
      letter-spacing: 0.03em;
      border: 1px solid var(--border);
      border-radius: 3px;
      color: var(--text-dim);
      text-transform: uppercase;
      transition: all 0.15s;
    }
    .btn-fda:hover { color: #FFFFFF; background: var(--accent); border-color: var(--accent); }
    .pill {
      display: inline-flex;
      align-items: center;
      gap: 4px;
      padding: 2px 9px;
      border-radius: 3px;
      font-size: 10.5px;
      font-weight: 600;
      letter-spacing: 0.03em;
      text-transform: uppercase;
    }
    .pill-on {
      background: var(--green-bg);
      color: var(--green);
      border: 1px solid var(--green-border);
    }
    .pill-off {
      background: transparent;
      color: var(--slate);
      border: 1px solid var(--border);
    }
    .pill-info {
      background: var(--blue-bg);
      color: var(--blue);
      border: 1px solid var(--blue-border);
    }
    .pill-semantic {
      background: rgba(79,107,197,0.1);
      color: #4f6bc5;
      border: 1px solid rgba(79,107,197,0.25);
      font-size: 10px;
      font-weight: 600;
      letter-spacing: 0.04em;
      text-transform: uppercase;
    }
    .pill-match {
      background: rgba(22,163,74,0.08);
      color: var(--green);
      border: 1px solid var(--green-border);
      font-size: 10px;
      font-weight: 500;
      letter-spacing: 0.02em;
    }
    .fts-score {
      font-family: var(--font-mono);
      font-size: 11px;
      color: var(--text-dim);
      margin-right: 6px;
    }
    .pill-type {
      background: var(--amber-bg);
      color: var(--accent);
      border: 1px solid var(--amber-border);
    }
    .pill-pc {
      background: transparent;
      color: var(--text-dim);
      border: 1px solid var(--border);
      font-family: var(--font-mono);
      font-size: 10px;
      cursor: pointer;
    }
    .pill-pc:hover {
      background: var(--accent);
      color: #fff;
      border-color: var(--accent);
    }
    .rt-pc.nav-highlight > .rt-pc-row {
      background: rgba(232, 80, 54, 0.15);
      border-radius: 4px;
      transition: background 0.3s ease;
    }

    .card-expand {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.35s ease, padding 0.35s ease;
      padding: 0 16px;
    }
    .card-expand.open {
      max-height: 2000px;
      padding: 0 16px 14px;
    }
    .card-expand h4 {
      font-size: 10px;
      font-weight: 600;
      color: var(--text-dim);
      text-transform: uppercase;
      letter-spacing: 0.06em;
      margin: 10px 0 4px;
      padding-bottom: 3px;
      border-bottom: 1px solid var(--border);
    }
    .card-expand p {
      font-size: 13px;
      line-height: 1.65;
      color: var(--text);
    }
    .card-expand .detail-btn { margin-top: 12px; }

    .match-context {
      background: var(--bg-card);
      border: 1px solid var(--accent);
      border-left: 3px solid var(--accent);
      border-radius: 6px;
      padding: 10px 14px;
      margin: 8px 0 12px;
    }
    .match-context-label {
      font-size: 10px;
      font-weight: 600;
      color: var(--accent);
      text-transform: uppercase;
      letter-spacing: 0.06em;
      margin-bottom: 4px;
    }
    .match-context-text {
      font-size: 12.5px;
      line-height: 1.6;
      color: var(--text);
      white-space: pre-wrap;
      word-break: break-word;
    }
    .match-context-text mark {
      background: rgba(79, 107, 197, 0.18);
      color: var(--accent);
      font-weight: 600;
      padding: 0 2px;
      border-radius: 2px;
    }

    .predicate-list { display: flex; flex-wrap: wrap; gap: 4px; margin-top: 4px; }
    .predicate-chip {
      font-family: var(--font-mono);
      font-size: 11px;
      padding: 2px 8px;
      background: var(--bg-input);
      border: 1px solid var(--border);
      border-radius: 3px;
      color: var(--text-dim);
    }

    /* ── Pagination ── */
    .pagination {
      display: flex;
      justify-content: center;
      align-items: center;
      gap: 16px;
      padding: 24px 0;
    }
    .page-info {
      font-family: var(--font-mono);
      font-size: 12px;
      color: var(--text-dim);
    }

    /* ── Modal ── */
    .modal-overlay {
      display: none;
      position: fixed;
      inset: 0;
      background: rgba(0,0,0,0.4);
      backdrop-filter: blur(4px);
      z-index: 100;
      overflow-y: auto;
      padding: 40px 20px;
    }
    .modal-overlay.open { display: block; }
    .modal {
      background: var(--bg-raised);
      border: 1px solid var(--border);
      max-width: 960px;
      margin: 0 auto;
      border-radius: var(--radius-lg);
      padding: 28px;
      position: relative;
      animation: modalIn 0.25s ease;
    }
    @keyframes modalIn {
      from { opacity: 0; transform: translateY(12px) scale(0.98); }
      to { opacity: 1; transform: translateY(0) scale(1); }
    }
    .modal-close {
      position: absolute;
      top: 14px; right: 18px;
      font-size: 20px;
      cursor: pointer;
      background: none;
      border: none;
      color: var(--text-dim);
      transition: color 0.15s;
      width: 32px; height: 32px;
      display: flex; align-items: center; justify-content: center;
      border-radius: 4px;
    }
    .modal-close:hover { color: var(--text-bright); background: #F6F6F6; }
    .modal h2 {
      font-family: var(--font-display);
      font-size: 20px;
      font-weight: 500;
      color: var(--text-bright);
      margin-bottom: 16px;
    }
    .modal h2 .source-tag {
      font-family: var(--font-mono);
      font-size: 12px;
      color: var(--accent);
      background: var(--accent-dim);
      padding: 2px 8px;
      border-radius: 3px;
      margin-left: 8px;
      vertical-align: middle;
    }
    .modal-section { margin-bottom: 20px; }
    .modal-section h3 {
      font-size: 11px;
      font-weight: 600;
      color: var(--text-dim);
      text-transform: uppercase;
      letter-spacing: 0.06em;
      margin-bottom: 8px;
      padding-bottom: 6px;
      border-bottom: 1px solid var(--border);
    }
    .modal-section pre {
      background: var(--bg-input);
      border: 1px solid var(--border);
      padding: 14px;
      border-radius: var(--radius);
      font-family: var(--font-mono);
      font-size: 12px;
      color: var(--text);
      overflow-x: auto;
      white-space: pre-wrap;
      word-break: break-word;
      max-height: 400px;
      overflow-y: auto;
      line-height: 1.6;
    }
    .modal-section table { width: 100%; border-collapse: collapse; font-size: 13px; }
    .modal-section td, .modal-section th {
      padding: 6px 10px;
      border-bottom: 1px solid var(--border);
      text-align: left;
    }
    .modal-section th {
      color: var(--text-dim);
      font-weight: 500;
      font-size: 12px;
      width: 180px;
      white-space: nowrap;
    }
    .modal-section td { color: var(--text); word-break: break-word; }

    .loading {
      text-align: center;
      padding: 48px;
      color: var(--text-dim);
      font-family: var(--font-display);
      font-style: italic;
    }
    .loading::after {
      content: '';
      display: inline-block;
      width: 16px; height: 16px;
      border: 2px solid var(--border);
      border-top-color: var(--accent);
      border-radius: 50%;
      animation: spin 0.7s linear infinite;
      margin-left: 10px;
      vertical-align: middle;
    }
    @keyframes spin { to { transform: rotate(360deg); } }

    .timing-badge {
      font-family: var(--font-mono);
      font-size: 0.7rem;
      color: var(--text-dim);
      background: rgba(0,0,0,0.04);
      border: 1px solid var(--border);
      border-radius: 4px;
      padding: 1px 6px;
      margin-left: 6px;
      vertical-align: middle;
    }
    .timing-semantic {
      border-color: rgba(79,107,197,0.3);
      color: #4f6bc5;
    }

    .semantic-loading {
      display: flex;
      align-items: center;
      gap: 10px;
      padding: 14px 18px;
      color: var(--text-dim);
      font-family: var(--font-body);
      font-size: 0.85rem;
      border: 1px dashed var(--border);
      border-radius: var(--radius);
      margin-top: 8px;
    }
    .semantic-spinner {
      display: inline-block;
      width: 14px; height: 14px;
      border: 2px solid var(--border);
      border-top-color: #4f6bc5;
      border-radius: 50%;
      animation: spin 0.7s linear infinite;
      flex-shrink: 0;
    }

    .error-msg {
      color: var(--red);
      padding: 14px 18px;
      background: var(--red-bg);
      border: 1px solid rgba(232,80,54,0.2);
      border-radius: var(--radius);
      margin: 12px 0;
      font-size: 13px;
    }

    .empty-state {
      text-align: center;
      padding: 60px 20px;
      color: var(--text-dim);
    }
    .empty-state svg { margin-bottom: 16px; opacity: 0.3; }
    .empty-state p { font-family: var(--font-display); font-style: italic; font-size: 15px; }

    /* ── Alerts Page ── */
    .alerts-page { max-width: 960px; margin: 0 auto; padding: 20px 28px 60px; }
    .alerts-header { display: flex; align-items: flex-start; justify-content: space-between; margin-bottom: 24px; }
    .alerts-header h2 { font-family: var(--font-display); font-size: 22px; font-weight: 700; color: var(--text-bright); margin-bottom: 4px; }
    .alerts-header .alerts-subtitle { color: var(--text-dim); font-size: 13px; }
    .alerts-sort { display: flex; align-items: center; gap: 8px; font-size: 13px; color: var(--text-dim); }
    .alerts-sort select { padding: 6px 10px; border: 1px solid var(--border); border-radius: var(--radius); font-size: 13px; font-family: var(--font-body); }
    .alerts-sort button { padding: 6px 12px; border: 1px solid var(--border); border-radius: var(--radius); background: var(--bg-raised); font-size: 13px; cursor: pointer; font-family: var(--font-body); }
    .alert-card {
      background: var(--bg-card);
      border: 1px solid var(--border);
      border-radius: var(--radius-lg);
      padding: 20px 24px;
      margin-bottom: 16px;
      transition: border-color 0.15s;
    }
    .alert-card:hover { border-color: var(--border-focus); }
    .alert-card-head { display: flex; align-items: flex-start; justify-content: space-between; margin-bottom: 12px; }
    .alert-card-name { font-size: 16px; font-weight: 600; color: var(--accent); text-decoration: none; }
    .alert-card-name:hover { text-decoration: underline; }
    .alert-card-actions { display: flex; align-items: center; gap: 8px; }
    .alert-card-meta { display: flex; gap: 32px; flex-wrap: wrap; font-size: 13px; color: var(--text-dim); margin-bottom: 8px; }
    .alert-card-meta dt { font-weight: 600; color: var(--text-dim); font-size: 11px; text-transform: uppercase; letter-spacing: 0.04em; margin-bottom: 2px; }
    .alert-card-meta dd { color: var(--text); }
    .alert-pill { padding: 3px 10px; border-radius: 12px; font-size: 11px; font-weight: 600; }
    .alert-pill-active { background: var(--green-bg); color: var(--green); border: 1px solid var(--green-border); }
    .alert-pill-inactive { background: var(--bg); color: var(--text-dim); border: 1px solid var(--border); }
    .alert-pill-freq { background: var(--blue-bg); color: var(--blue); border: 1px solid var(--blue-border); }
    .alert-action-btn {
      background: none; border: 1px solid var(--border); border-radius: var(--radius); padding: 4px 8px;
      cursor: pointer; color: var(--text-dim); font-size: 13px; transition: all 0.15s;
    }
    .alert-action-btn:hover { border-color: var(--accent); color: var(--accent); }
    .alert-action-btn.delete:hover { border-color: var(--red); color: var(--red); }
    .alert-toggle { cursor: pointer; }
    .alerts-empty { text-align: center; padding: 60px 20px; color: var(--text-dim); }
    .alerts-empty p { font-size: 15px; margin-bottom: 16px; }
    .alert-filters-table { width: 100%; font-size: 13px; border-collapse: collapse; background: var(--bg); border-radius: var(--radius); overflow: hidden; }
    .alert-filters-table td { padding: 6px 12px; border-bottom: 1px solid var(--border); }
    .alert-filters-table td:first-child { font-weight: 600; color: var(--text-dim); width: 140px; }
    .alert-create-btn {
      padding: 8px 16px; border: none; border-radius: var(--radius); font-size: 13px; font-weight: 600;
      font-family: var(--font-body); cursor: pointer; background: var(--accent); color: #fff; transition: background 0.15s;
    }
    .alert-create-btn:hover { background: #1e2d6b; }
    .alert-create-btn:disabled { opacity: 0.5; cursor: not-allowed; }

    /* ── Share Button ── */
    .share-btn {
      display: inline-flex;
      align-items: center;
      gap: 5px;
    }

    /* ── Rate Limit Badge ── */
    .rate-limit-badge {
      font-family: var(--font-mono);
      font-size: 11px;
      color: var(--text-dim);
      background: var(--bg);
      border: 1px solid var(--border);
      border-radius: var(--radius);
      padding: 2px 8px;
      white-space: nowrap;
    }
    .rate-limit-badge.rate-limit-low {
      color: var(--red);
      border-color: var(--red);
      background: rgba(232, 80, 54, 0.06);
    }

    /* ── Rate Limit Modal ── */
    .rl-modal-content {
      text-align: center;
      padding: 24px;
    }
    .rl-modal-content h2 {
      color: var(--text-bright);
      margin-bottom: 12px;
      font-size: 18px;
    }
    .rl-modal-content p {
      color: var(--text);
      font-size: 14px;
      line-height: 1.6;
      margin-bottom: 12px;
    }
    .rl-modal-content .rl-cta {
      display: inline-block;
      padding: 10px 24px;
      border-radius: var(--radius);
      font-size: 14px;
      font-weight: 600;
      font-family: var(--font-body);
      cursor: pointer;
      border: none;
      margin: 8px 4px;
      transition: background 0.15s;
    }
    .rl-modal-content .rl-cta-primary {
      background: var(--accent);
      color: #fff;
    }
    .rl-modal-content .rl-cta-primary:hover { background: #1e2d66; }
    .rl-modal-content .rl-cta-secondary {
      background: var(--bg);
      color: var(--accent);
      border: 1px solid var(--border);
    }
    .rl-modal-content .rl-cta-secondary:hover { border-color: var(--accent); }
    .rl-referral-link {
      display: flex;
      align-items: center;
      gap: 8px;
      background: var(--bg);
      border: 1px solid var(--border);
      border-radius: var(--radius);
      padding: 8px 12px;
      margin: 12px auto;
      max-width: 400px;
    }
    .rl-referral-link input {
      flex: 1;
      border: none;
      background: transparent;
      font-family: var(--font-mono);
      font-size: 12px;
      color: var(--text);
      outline: none;
    }
    .rl-referral-link button {
      padding: 4px 10px;
      font-size: 11px;
      border: 1px solid var(--border);
      border-radius: var(--radius);
      background: var(--bg-raised);
      cursor: pointer;
      font-family: var(--font-body);
    }
    .rl-footnote {
      font-size: 12px;
      color: var(--text-dim);
      margin-top: 16px;
    }

    /* ── Auth Modal ── */
    .auth-modal {
      background: var(--bg-raised);
      border: 1px solid var(--border);
      max-width: 440px;
      margin: 80px auto 0;
      border-radius: var(--radius-lg);
      padding: 32px;
      position: relative;
      animation: modalIn 0.25s ease;
    }
    .auth-modal h2 {
      font-family: var(--font-display);
      font-size: 22px;
      font-weight: 600;
      color: var(--text-bright);
      margin-bottom: 4px;
    }
    .auth-modal .auth-subtitle {
      color: var(--text-dim);
      font-size: 13px;
      margin-bottom: 24px;
    }
    .auth-tabs {
      display: flex;
      gap: 0;
      margin-bottom: 24px;
      border-bottom: 2px solid var(--border);
    }
    .auth-tab {
      flex: 1;
      padding: 10px 0;
      text-align: center;
      font-size: 13px;
      font-weight: 600;
      color: var(--text-dim);
      cursor: pointer;
      border-bottom: 2px solid transparent;
      margin-bottom: -2px;
      transition: all 0.15s;
      background: none;
      border-top: none;
      border-left: none;
      border-right: none;
      font-family: var(--font-body);
    }
    .auth-tab:hover { color: var(--text-bright); }
    .auth-tab.active { color: var(--accent); border-bottom-color: var(--accent); }
    .auth-step { display: none; }
    .auth-step.active { display: block; }
    .auth-field { margin-bottom: 16px; }
    .auth-field label {
      display: block;
      font-size: 12px;
      font-weight: 600;
      color: var(--text-dim);
      margin-bottom: 6px;
      text-transform: uppercase;
      letter-spacing: 0.04em;
    }
    .auth-field input[type="text"],
    .auth-field input[type="email"] {
      width: 100%;
      padding: 10px 12px;
      border: 1px solid var(--border);
      border-radius: var(--radius);
      font-size: 14px;
      font-family: var(--font-body);
      background: var(--bg-input);
      color: var(--text);
      transition: border-color 0.15s;
    }
    .auth-field input:focus {
      outline: none;
      border-color: var(--accent);
      box-shadow: 0 0 0 3px var(--accent-dim);
    }
    .auth-checkbox-group { margin-bottom: 20px; }
    .auth-checkbox-group legend {
      font-size: 12px;
      font-weight: 600;
      color: var(--text-dim);
      margin-bottom: 10px;
      text-transform: uppercase;
      letter-spacing: 0.04em;
    }
    .auth-checkbox-item {
      display: flex;
      align-items: flex-start;
      gap: 10px;
      padding: 8px 0;
    }
    .auth-checkbox-item input[type="checkbox"] {
      margin-top: 2px;
      accent-color: var(--accent);
      width: 16px;
      height: 16px;
      flex-shrink: 0;
    }
    .auth-checkbox-item span {
      font-size: 13px;
      color: var(--text);
      line-height: 1.4;
    }
    .auth-btn {
      width: 100%;
      padding: 12px;
      border: none;
      border-radius: var(--radius);
      font-size: 14px;
      font-weight: 600;
      font-family: var(--font-body);
      cursor: pointer;
      transition: all 0.15s;
    }
    .auth-btn-primary {
      background: var(--accent);
      color: #fff;
    }
    .auth-btn-primary:hover { background: #1e2d6b; }
    .auth-btn-primary:disabled { opacity: 0.5; cursor: not-allowed; }
    .auth-otp-inputs {
      display: flex;
      gap: 8px;
      justify-content: center;
      margin: 24px 0;
    }
    .auth-otp-inputs input {
      width: 48px;
      height: 56px;
      text-align: center;
      font-size: 24px;
      font-weight: 600;
      font-family: var(--font-mono);
      border: 2px solid var(--border);
      border-radius: var(--radius);
      background: var(--bg-input);
      color: var(--text-bright);
      transition: border-color 0.15s;
    }
    .auth-otp-inputs input:focus {
      outline: none;
      border-color: var(--accent);
      box-shadow: 0 0 0 3px var(--accent-dim);
    }
    .auth-error {
      color: var(--red);
      font-size: 13px;
      margin-top: 8px;
      display: none;
    }
    .auth-error.visible { display: block; }
    .auth-resend {
      text-align: center;
      margin-top: 12px;
      font-size: 13px;
      color: var(--text-dim);
    }
    .auth-resend a {
      color: var(--accent);
      cursor: pointer;
      text-decoration: none;
      font-weight: 600;
    }
    .auth-resend a:hover { text-decoration: underline; }
    .auth-resend a.disabled { opacity: 0.4; pointer-events: none; }
    .auth-success {
      text-align: center;
      padding: 24px 0;
    }
    .auth-success h3 {
      font-size: 20px;
      color: var(--text-bright);
      margin-bottom: 8px;
    }
    .auth-success p {
      color: var(--text-dim);
      font-size: 14px;
    }
    .auth-user-menu {
      display: flex;
      align-items: center;
      gap: 16px;
    }
    .auth-user-menu .auth-alerts-link {
      font-size: 16px;
      font-weight: 700;
      color: var(--accent);
      text-decoration: none;
      cursor: pointer;
    }
    .auth-user-menu .auth-alerts-link:hover { text-decoration: none; border-bottom-color: #E85036; }
    .auth-user-dropdown {
      position: relative;
      cursor: pointer;
      font-size: 14px;
      color: var(--text);
      display: flex;
      align-items: center;
      gap: 4px;
    }
    .auth-user-dropdown:hover { color: var(--text-bright); }
    .auth-dropdown-menu {
      display: none;
      position: absolute;
      top: 100%;
      right: 0;
      margin-top: 8px;
      background: var(--bg-raised);
      border: 1px solid var(--border);
      border-radius: var(--radius);
      box-shadow: 0 4px 12px rgba(0,0,0,0.1);
      min-width: 140px;
      z-index: 200;
    }
    .auth-dropdown-menu.open { display: block; }
    .auth-dropdown-menu a {
      display: block;
      padding: 10px 16px;
      font-size: 13px;
      color: var(--text);
      text-decoration: none;
      transition: background 0.1s;
    }
    .auth-dropdown-menu a:hover { background: var(--bg); }

    /* ── Deep Research ── */
    .dr-bar {
      display: none;
      background: linear-gradient(90deg, var(--accent-dim), rgba(45,63,134,0.04));
      border: 1px solid var(--blue-border);
      border-radius: var(--radius);
      padding: 10px 18px;
      margin-bottom: 16px;
      cursor: pointer;
      transition: all 0.2s;
      font-size: 13px;
      font-weight: 500;
      color: var(--accent);
    }
    .dr-bar:hover { background: var(--accent-dim); border-color: var(--accent); }
    .dr-bar.visible { display: block; }

    .dr-panel {
      display: none;
      background: var(--bg-raised);
      border: 1px solid var(--border);
      border-radius: var(--radius-lg);
      padding: 20px;
      margin-bottom: 16px;
      animation: cardIn 0.25s ease;
    }
    .dr-panel.visible { display: block; }

    .dr-chips { display: flex; flex-wrap: wrap; gap: 6px; margin-bottom: 10px; }
    .dr-chip {
      padding: 4px 12px;
      border: 1px solid var(--border);
      border-radius: 20px;
      font-size: 11px;
      font-weight: 500;
      color: var(--text-dim);
      cursor: pointer;
      transition: all 0.15s;
      background: var(--bg-input);
    }
    .dr-chip:hover { border-color: var(--accent); color: var(--accent); }

    .dr-textarea {
      width: 100%;
      min-height: 72px;
      padding: 10px 14px;
      border: 1px solid var(--border);
      border-radius: var(--radius);
      font-family: var(--font-body);
      font-size: 13px;
      color: var(--text);
      background: var(--bg-input);
      resize: vertical;
      transition: border-color 0.2s;
      margin-bottom: 12px;
    }
    .dr-textarea:focus { outline: none; border-color: var(--accent); box-shadow: 0 0 0 3px var(--accent-dim); }

    .dr-controls { display: flex; align-items: center; gap: 12px; flex-wrap: wrap; }
    .dr-model-select-wrap {
      position: relative;
      min-width: 300px;
    }
    .dr-model-input {
      width: 100%;
      padding: 6px 28px 6px 10px;
      border: 1px solid var(--border);
      border-radius: var(--radius);
      font-family: var(--font-body);
      font-size: 12px;
      color: var(--text);
      background: var(--bg-input);
      cursor: pointer;
      box-sizing: border-box;
    }
    .dr-model-input:focus { outline: none; border-color: var(--accent); box-shadow: 0 0 0 3px var(--accent-dim); }
    .dr-model-input::placeholder { color: var(--text-dim); }
    .dr-model-chevron {
      position: absolute; right: 8px; top: 50%; transform: translateY(-50%);
      pointer-events: none; color: var(--text-dim); font-size: 10px;
    }
    .dr-model-dropdown {
      display: none;
      position: absolute; top: 100%; left: 0; right: 0; z-index: 100;
      max-height: 260px; overflow-y: auto;
      border: 1px solid var(--border); border-top: none;
      border-radius: 0 0 var(--radius) var(--radius);
      background: var(--bg-input);
      box-shadow: 0 4px 12px rgba(0,0,0,0.08);
    }
    .dr-model-dropdown.open { display: block; }
    .dr-model-option {
      padding: 6px 10px;
      font-size: 12px;
      color: var(--text);
      cursor: pointer;
      white-space: nowrap;
      overflow: hidden;
      text-overflow: ellipsis;
    }
    .dr-model-option:hover, .dr-model-option.highlighted { background: var(--accent-dim); }
    .dr-model-option.selected { font-weight: 600; }
    .dr-cost {
      font-family: var(--font-mono);
      font-size: 11px;
      color: var(--text-dim);
      margin-left: auto;
    }

    /* Two-column progress layout */
    .dr-progress {
      display: none;
      background: var(--bg-raised);
      border: 1px solid var(--border);
      border-radius: var(--radius-lg);
      margin-bottom: 16px;
      overflow: hidden;
    }
    .dr-progress.visible { display: block; }
    .dr-progress-bar {
      height: 4px;
      background: var(--border);
      position: relative;
    }
    .dr-progress-fill {
      height: 100%;
      background: var(--accent);
      transition: width 0.3s ease;
      width: 0%;
    }
    .dr-progress-header {
      display: flex;
      justify-content: space-between;
      align-items: center;
      padding: 12px 18px;
      border-bottom: 1px solid var(--border);
      font-size: 12px;
      color: var(--text-dim);
    }
    .dr-progress-header .dr-eta { font-family: var(--font-mono); }
    .dr-columns {
      display: grid;
      grid-template-columns: 35% 65%;
      height: 520px;
    }
    .dr-left {
      border-right: 1px solid var(--border);
      overflow-y: auto;
    }
    .dr-right {
      padding: 16px 20px;
      overflow-y: auto;
    }
    .dr-item {
      padding: 8px 14px;
      border-bottom: 1px solid var(--border);
      cursor: pointer;
      display: flex;
      align-items: center;
      gap: 8px;
      font-size: 12px;
      transition: background 0.1s;
    }
    .dr-item:hover { background: var(--bg-card-hover); }
    .dr-item.selected { background: var(--accent-dim); border-left: 3px solid var(--accent); }
    .dr-item-id { font-family: var(--font-mono); font-weight: 600; color: var(--accent); min-width: 80px; }
    .dr-item-name { flex: 1; color: var(--text); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
    .dr-item-status { flex-shrink: 0; }
    .dr-spinner-sm {
      display: inline-block; width: 12px; height: 12px;
      border: 2px solid var(--border); border-top-color: var(--accent);
      border-radius: 50%; animation: spin 0.7s linear infinite;
    }
    .dr-check { color: var(--green); font-weight: bold; }
    .dr-fail { color: var(--red); font-weight: bold; }

    .dr-preview { font-size: 13px; line-height: 1.7; color: var(--text); word-break: break-word; overflow-wrap: break-word; }
    .dr-preview h1, .dr-preview h2, .dr-preview h3, .dr-preview h4 { margin: 1em 0 0.5em; color: var(--primary); }
    .dr-preview h1 { font-size: 1.4em; } .dr-preview h2 { font-size: 1.2em; } .dr-preview h3 { font-size: 1.1em; }
    .dr-preview p { margin: 0.5em 0; }
    .dr-preview ul, .dr-preview ol { margin: 0.5em 0; padding-left: 1.5em; }
    .dr-preview li { margin: 0.25em 0; }
    .dr-preview strong { font-weight: 600; }
    .dr-preview code { background: var(--bg); padding: 2px 5px; border-radius: 3px; font-size: 0.9em; }
    .dr-preview pre { background: var(--bg); padding: 12px; border-radius: 6px; overflow-x: auto; }
    .dr-preview blockquote { border-left: 3px solid var(--primary); margin: 0.5em 0; padding: 0.25em 1em; color: var(--text-dim); }
    .dr-preview-empty { color: var(--text-dim); font-style: italic; padding: 40px 0; text-align: center; }

    .dr-actions {
      display: flex; gap: 10px; padding: 12px 18px;
      border-top: 1px solid var(--border);
    }

    /* Report view */
    .dr-report {
      display: none;
      background: var(--bg-raised);
      border: 1px solid var(--border);
      border-radius: var(--radius-lg);
      padding: 24px;
      margin-bottom: 16px;
    }
    .dr-report.visible { display: block; }
    .dr-report h3 {
      font-family: var(--font-display);
      font-size: 16px;
      font-weight: 500;
      color: var(--text-bright);
      margin-bottom: 12px;
    }
    .dr-report-stats {
      display: flex; flex-wrap: wrap; gap: 16px;
      margin-bottom: 16px; font-size: 12px; color: var(--text-dim);
    }
    .dr-report-stats strong { color: var(--text-bright); }
    .dr-synthesis {
      background: var(--bg-input);
      border: 1px solid var(--border);
      border-radius: var(--radius);
      padding: 16px;
      margin: 16px 0;
      font-size: 13px;
      line-height: 1.7;
      color: var(--text);
      white-space: pre-wrap;
      word-break: break-word;
      max-height: 500px;
      overflow-y: auto;
    }
    .dr-result-table {
      width: 100%; border-collapse: collapse;
      font-size: 12px; margin-top: 12px;
    }
    .dr-result-table th, .dr-result-table td {
      padding: 6px 10px; border-bottom: 1px solid var(--border); text-align: left;
    }
    .dr-result-table th {
      color: var(--text-dim); font-weight: 600; font-size: 10px;
      text-transform: uppercase; letter-spacing: 0.04em;
    }
    .dr-result-table td { color: var(--text); }
    .dr-result-table .dr-resp-cell {
      max-width: 400px; overflow: hidden; text-overflow: ellipsis;
      white-space: nowrap; cursor: pointer; color: var(--accent);
    }
    .dr-result-table .dr-resp-cell:hover { text-decoration: underline; }
    .dr-result-table .dr-resp-expanded { white-space: pre-wrap; max-width: 600px; }

    /* ── Credit Badge ── */
    .credit-badge {
      font-family: var(--font-mono);
      font-size: 11px;
      font-weight: 600;
      padding: 3px 10px;
      border-radius: 12px;
      background: var(--green-bg);
      color: var(--green);
      border: 1px solid var(--green-border);
      white-space: nowrap;
    }
    .credit-badge.credit-low {
      background: var(--red-bg);
      color: var(--red);
      border-color: rgba(232,80,54,0.2);
    }
  </style>