body {
    display: block;
    line-height: 1.5;
  }
  .top { display: flex; align-items: center; justify-content: space-between; margin-bottom: 28px; flex-wrap: wrap; gap: 12px; }
  .back {
    display: inline-flex; align-items: center; gap: 8px; text-decoration: none; color: #333;
    padding: 8px 12px; border: 1px solid #d8d5ce; border-radius: 8px; background: #fff;
    font-size: 0.85rem;
  }
  .back:hover { background: #f0ede7; border-color: #bbb; color: #111; }
  .back svg { flex-shrink: 0; opacity: 0.85; }
  h1 {
    font-size: 1.25rem; font-weight: 600; color: #2c2c2c; margin-bottom: 20px;
    display: flex; align-items: center; gap: 10px;
  }
  h1 svg { flex-shrink: 0; color: #4a5568; }

  .layout {
    display: grid; grid-template-columns: 240px minmax(0, 1fr); gap: 24px;
    align-items: start;
  }
  @media (max-width: 720px) {
    .layout { grid-template-columns: 1fr; }
  }

  .tabs {
    display: flex; flex-direction: column; gap: 6px;
    background: #fff; border: 1px solid #e0ddd8; border-radius: 8px;
    padding: 8px;
  }
  .tab-btn {
    display: flex; align-items: center; gap: 8px;
    background: none; border: 1px solid transparent; color: #333;
    padding: 8px 10px; font-family: monospace; font-size: 0.85rem;
    border-radius: 6px; cursor: pointer; text-align: left; width: 100%;
  }
  .tab-btn:hover { background: #f3f1ec; border-color: #d8d5ce; color: #111; }
  .tab-btn.active { background: #e8e4dc; border-color: #bbb; color: #111; font-weight: bold; }
  .tab-btn svg { flex-shrink: 0; opacity: 0.75; }

  .panel {
    background: #fff; border: 1px solid #e0ddd8; border-radius: 8px;
    padding: 18px; min-height: 200px;
  }
  .panel-header {
    display: flex; align-items: center; justify-content: space-between;
    gap: 12px; flex-wrap: wrap; margin-bottom: 14px;
  }
  .panel-title {
    font-size: 0.95rem; font-weight: 600; color: #2c2c2c;
    display: flex; align-items: center; gap: 8px;
  }
  .panel-subtitle { font-size: 0.75rem; color: #666; }

  .config-pre {
    background: #f8f6f2; border: 1px solid #e0ddd8; border-radius: 6px;
    padding: 12px 14px; font-size: 0.8rem; line-height: 1.5;
    max-height: 70vh; overflow: auto; white-space: pre;
    color: #111;
  }
  .info-message {
    font-size: 0.85rem; color: #666; padding: 12px 14px; background: #f3f1ec;
    border: 1px dashed #ccc; border-radius: 6px;
  }
  .error-message {
    font-size: 0.85rem; color: #8a2a2a; padding: 12px 14px; background: #fdf3f3;
    border: 1px solid #f1c8c8; border-radius: 6px;
  }

  .stats-form {
    display: flex; align-items: end; gap: 12px; flex-wrap: wrap;
    margin-bottom: 14px;
  }
  .stats-field { display: flex; flex-direction: column; gap: 4px; }
  .stats-field label { font-size: 0.75rem; color: #666; text-transform: uppercase; letter-spacing: 0.06em; }
  .stats-field input {
    font-family: monospace; font-size: 0.85rem; padding: 6px 8px;
    border: 1px solid #d8d5ce; border-radius: 6px; background: #fff; color: #111;
  }
  .stats-button {
    font-family: monospace; font-size: 0.85rem; padding: 7px 14px;
    border: 1px solid #bbb; border-radius: 6px; background: #e8e4dc; color: #111;
    cursor: pointer;
  }
  .stats-button:hover { background: #ddd6c7; }
  .stats-button:disabled { opacity: 0.6; cursor: wait; }

  .stats-presets { display: flex; flex-wrap: wrap; gap: 6px; margin-bottom: 14px; }
  .preset-btn {
    font-family: monospace; font-size: 0.75rem; padding: 4px 10px;
    border: 1px solid #ccc; border-radius: 3px; background: #fff; color: #333;
    cursor: pointer;
  }
  .preset-btn:hover { border-color: #888; color: #111; background: #f3f1ec; }

  .view-toggle { display: flex; gap: 6px; margin: 10px 0 12px; }
  .view-btn {
    font-family: monospace; font-size: 0.75rem; padding: 3px 10px;
    border: 1px solid #ccc; border-radius: 3px; background: #fff; color: #666;
    cursor: pointer;
  }
  .view-btn:hover { border-color: #888; color: #111; }
  .view-btn.active { background: #e8e4dc; border-color: #bbb; color: #111; font-weight: bold; }

  .stats-range {
    font-size: 0.75rem; color: #666; margin-bottom: 10px;
  }

  table.stats-table {
    border-collapse: collapse; width: 100%; font-size: 0.85rem;
    background: #fff;
  }
  .stats-table th, .stats-table td {
    border: 1px solid #e0ddd8; padding: 6px 10px; text-align: left;
  }
  .stats-table th {
    background: #f3f1ec; font-weight: 600; color: #2c2c2c;
    text-transform: uppercase; font-size: 0.7rem; letter-spacing: 0.05em;
  }
  .stats-table td.num { text-align: right; font-variant-numeric: tabular-nums; }
  .stats-table td.empty { color: #999; text-align: right; }

  .config-toolbar { display: flex; flex-wrap: wrap; gap: 6px; margin: 0 0 12px; }
  .config-tool-btn {
    font-family: monospace; font-size: 0.75rem; padding: 3px 10px;
    border: 1px solid #ccc; border-radius: 3px; background: #fff; color: #666;
    cursor: pointer;
  }
  .config-tool-btn:hover { border-color: #888; color: #111; }
  .config-tool-btn.active { background: #e8e4dc; border-color: #bbb; color: #111; font-weight: bold; }

  table.config-table {
    border-collapse: collapse; width: 100%; font-size: 0.85rem;
    background: #fff;
  }
  .config-table th, .config-table td {
    border: 1px solid #e0ddd8; padding: 6px 10px; text-align: left;
  }
  .config-table th {
    background: #f3f1ec; font-weight: 600; color: #2c2c2c;
    text-transform: uppercase; font-size: 0.7rem; letter-spacing: 0.05em;
  }
  .config-table td.num { text-align: right; font-variant-numeric: tabular-nums; }
  .config-table tr.config-group-header th {
    background: #e8e4dc; text-transform: none; font-size: 0.8rem; letter-spacing: normal;
  }
  .config-table td.color-cell {
    display: flex; align-items: center; gap: 8px;
  }
  .color-swatch {
    display: inline-block; width: 1.1rem; height: 1.1rem;
    border: 1px solid rgba(0, 0, 0, 0.25); border-radius: 2px; flex-shrink: 0;
  }
  .color-label { font-family: monospace; font-size: 0.8rem; }