.toggle-wrap input:checked + .toggle-track {
      background: var(--toggle-on);
    }

    .toggle-wrap input:checked + .toggle-track::after {
      transform: translateX(13px);
    }


    #usage-panel-header,
    #knowledge-panel-header,
    #compact-panel-header {
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 12px;
      margin-bottom: 6px;
    }


    #usage-panel-header strong,
    #knowledge-panel-header strong,
    #compact-panel-header strong {
      font-size: 16px;
      font-weight: 700;
      color: var(--text2);
    }


    #usage-close-btn,
    #knowledge-close-btn,
    #compact-cancel-btn,
    #compact-confirm-btn {
      width: 32px;
      border-radius: 10px;
      border: 1px solid var(--border);
      background: var(--image-btn-bg);
      color: var(--text2);
      cursor: pointer;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      box-shadow: none;
      transition: background 0.15s, border-color 0.15s, color 0.15s;
    }


    #usage-close-btn,
    #knowledge-close-btn {
      height: 32px;
    }


    #usage-close-btn:hover,
    #knowledge-close-btn:hover {
      background: var(--danger-soft);
      border-color: var(--border-strong);
      color: var(--danger);
    }


    #usage-table {
      width: 100%;
      border-collapse: collapse;
      font-size: 13px;
      overflow: hidden;
      border-radius: 12px;
      border: 1px solid var(--border);
      background: var(--bg3);
    }


    #usage-table th, #usage-table td {
      padding: 8px 10px;
      border-bottom: 1px solid var(--border);
      text-align: left;
    }


    #usage-empty {
      color: var(--text2);
      font-size: 13px;
      padding: 12px 0;
    }


    .usage-tab {
      font-size: 12px;
      padding: 4px 12px;
      border-radius: 6px;
      border: 1px solid var(--border);
      background: transparent;
      color: var(--text2);
      cursor: pointer;
      transition: background 0.15s, color 0.15s;
    }

    .usage-tab.active {
      background: var(--accent);
      color: var(--accent-text);
      border-color: var(--accent);
    }


    .usage-range-btn {
      font-size: 11px;
      padding: 3px 10px;
      border-radius: 5px;
      border: 1px solid var(--border);
      background: transparent;
      color: var(--text2);
      cursor: pointer;
      transition: background 0.15s, color 0.15s;
    }

    .usage-range-btn.active {
      background: var(--accent);
      color: var(--accent-text);
      border-color: var(--accent);
    }

    .usage-metric-toggle {
      font-size: 11px;
      padding: 3px 10px;
      border-radius: 5px;
      border: 1px solid var(--border);
      background: transparent;
      color: var(--text2);
      cursor: pointer;
      transition: background 0.15s, color 0.15s;
    }

    .usage-metric-toggle.active {
      background: var(--accent);
      color: var(--accent-text);
      border-color: var(--accent);
    }

    .chart-title {
      font-size: 13px;
      font-weight: 600;
      color: var(--text2);
      margin-bottom: 6px;
    }


    #usage-chart-model,
    #usage-chart-provider {
      display: flex;
      align-items: stretch;
    }


    .chart-y-axis {
      display: flex;
      flex-direction: column;
      justify-content: space-between;
      width: 44px;
      padding-right: 4px;
      flex-shrink: 0;
      font-size: 10px;
      color: var(--text2);
    }

    .chart-y-axis span {
      text-align: right;
      line-height: 1;
    }

    .chart-y-axis span:first-child { margin-top: -5px; }

    .chart-y-axis span:last-child { margin-bottom: -5px; }


    .usage-chart {
      display: flex;
      gap: 4px;
      height: 160px;
      padding: 0 12px;
      border-left: 1px solid var(--border);
      border-bottom: 1px solid var(--border);
      position: relative;
    }


    .usage-chart-bar-group {
      display: flex;
      flex-direction: column;
      justify-content: flex-end;
      flex: 1;
      min-width: 0;
      position: relative;
      height: 100%;
    }


    .usage-chart-bar-group .v-indicator {
      position: absolute;
      top: 0;
      bottom: 0;
      left: 50%;
      width: 0;
      border-left: 1px dashed var(--accent);
      opacity: 0;
      pointer-events: none;
      transition: opacity 0.15s;
    }


    .usage-chart-bar-group:hover .v-indicator {
      opacity: 1;
    }


    .usage-chart-bar-segment {
      width: 100%;
      transition: height 0.2s;
    }


    .usage-chart-bar-label {
      position: absolute;
      bottom: -20px;
      left: 50%;
      transform: translateX(-50%);
      font-size: 10px;
      color: var(--text2);
      white-space: nowrap;
    }


    .usage-chart-guide {
      position: absolute;
      left: 0;
      right: 0;
      border-top: 1px dashed var(--border);
      pointer-events: none;
    }


    .usage-legend {
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
      margin-top: 26px;
    }


    .usage-legend-item {
      display: flex;
      align-items: center;
      gap: 4px;
      font-size: 11px;
      color: var(--text2);
    }


    .usage-legend-swatch {
      width: 10px;
      height: 10px;
      border-radius: 2px;
      flex-shrink: 0;
    }

    .usage-legend-sep {
      width: 1px;
      height: 12px;
      background: var(--border);
      flex-shrink: 0;
      align-self: center;
    }

    .usage-legend-total {
      font-weight: 600;
      color: var(--text1);
    }

    .usage-legend-total-swatch {
      background: var(--text) !important;
    }


    #knowledge-list {
      display: flex;
      flex-direction: column;
      gap: 12px;
    }


    .knowledge-card {
      border: 1px solid var(--border);
      border-radius: 12px;
      background: var(--bg3);
      padding: 12px;
    }


    .knowledge-title {
      font-size: 14px;
      font-weight: 700;
      color: var(--text2);
      margin-bottom: 4px;
    }


    .knowledge-desc {
      font-size: 12px;
      color: var(--muted);
      margin-bottom: 9px;
      line-height: 1.45;
    }


    .knowledge-files {
      display: flex;
      flex-direction: column;
      gap: 5px;
      font-size: 13px;
    }


    .knowledge-file {
      font-family: inherit;
      color: var(--text2);
    }


    .knowledge-toggle {
      align-self: flex-start;
      margin-top: 4px;
      border: 1px solid var(--border);
      background: var(--image-btn-bg);
      color: var(--accent);
      border-radius: 999px;
      padding: 3px 9px;
      font-size: 12px;
      cursor: pointer;
    }


    .knowledge-toggle:hover {
      border-color: var(--accent);
      background: var(--accent-soft);
    }


    .compact-rounds-row {
      display: flex;
      align-items: center;
      gap: 10px;
      margin-top: 14px;
    }

    .compact-rounds-row label {
      font-size: 13px;
      color: var(--text2);
      white-space: nowrap;
    }

    .compact-rounds-row select {
      flex: 1;
      height: 32px;
      padding: 0 8px;
      border: 1px solid var(--border);
      border-radius: 8px;
      background: var(--bg2);
      color: var(--text);
      font-size: 13px;
      cursor: pointer;
      outline: none;
    }

    .compact-rounds-row select:hover,
    .compact-rounds-row select:focus {
      border-color: var(--border-strong);
    }


    #compact-panel-body {
      font-size: 14px;
      line-height: 1.65;
      color: var(--text2);
      margin-bottom: 18px;
      flex: 1;
      overflow-y: auto;
      min-height: 0;
    }

    #compact-panel-footer {
      display: flex;
      justify-content: center;
      gap: 10px;
    }


    #compact-cancel-btn,
    #compact-confirm-btn {
      width: auto;
      min-width: 96px;
      height: 36px;
      padding: 0 14px;
    }


    #compact-cancel-btn:hover {
      border-color: var(--border-strong);
      background: var(--bg2);
      color: var(--text2);
    }


    #compact-confirm-btn {
      border-color: var(--danger);
      background: var(--danger-soft);
      color: var(--danger);
    }


    #compact-confirm-btn:hover:not(:disabled) {
      border-color: var(--danger);
      background: var(--danger-soft);
    }


    #compact-confirm-btn:disabled {
      opacity: 0.55;
      cursor: not-allowed;
    }


    .typing-dots {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      min-height: 20px;
      padding: 2px 0;
      margin-top: 12px;
    }


    .typing-dots span {
      width: 7px;
      height: 7px;
      border-radius: 50%;
      background: var(--accent);
      opacity: 0.45;
      animation: typing-bounce 0.9s infinite ease-in-out;
    }


    .typing-dots span:nth-child(2) { animation-delay: 0.15s; }

    .typing-dots span:nth-child(3) { animation-delay: 0.3s; }


    @keyframes typing-bounce {
      0%, 80%, 100% {
        transform: translateY(0);
        opacity: 0.35;
      }
      40% {
        transform: translateY(-4px);
        opacity: 1;
      }
    }


    .error-message {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      width: 100%;
      max-width: min(82%, 920px);
      color: var(--text2);
      font-size: 13px;
      line-height: 1.5;
      padding: 2px 0;
    }


    .error-message-dot {
      width: 8px;
      height: 8px;
      border-radius: 50%;
      background: var(--danger);
      flex: 0 0 auto;
    }


    .error-message-text {
      color: var(--text2);
    }

    .access-token-gate {
      display: none;
      position: fixed;
      inset: 0;
      z-index: 10000;
      align-items: center;
      justify-content: center;
      background: color-mix(in srgb, var(--bg, #111) 70%, transparent);
      padding: 20px;
    }

    .access-token-gate.open {
      display: flex;
    }

    .access-token-panel {
      width: min(100%, 400px);
      background: var(--panel-bg, var(--card-bg, #1c1917));
      color: var(--text2, #fafaf9);
      border: 1px solid var(--border, #444);
      border-radius: 14px;
      padding: 20px;
      display: grid;
      gap: 12px;
    }

    .access-token-panel h2 {
      margin: 0;
      font-size: 1.1rem;
    }

    .access-token-panel p {
      margin: 0;
      font-size: 0.9rem;
      opacity: 0.85;
      line-height: 1.4;
    }

    .access-token-panel input,
    .access-token-panel button {
      width: 100%;
      font: inherit;
      border-radius: 10px;
      border: 1px solid var(--border, #444);
      padding: 12px;
      background: transparent;
      color: inherit;
    }

    .access-token-panel button {
      cursor: pointer;
      font-weight: 600;
      background: var(--accent, #0f766e);
      border-color: transparent;
    }

    .access-token-status {
      min-height: 1.2em;
      color: var(--danger, #b91c1c);
      font-size: 0.85rem;
    }