:root {
    --bg: #0f1117;
    --card-bg: #1a1d27;
    --border: #2a2d3a;
    --text: #e4e4e7;
    --muted: #8b8d98;
    --accent: #6366f1;
    --green: #22c55e;
    --red: #ef4444;
    --yellow: #eab308;
    --mono: 'SF Mono','Cascadia Code','Consolas',monospace;
  }
  * { margin: 0; padding: 0; box-sizing: border-box; }
  body {
    background: var(--bg);
    color: var(--text);
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    padding: 24px 32px;
    min-height: 100vh;
  }
  h1 { font-size: 1.4rem; font-weight: 600; margin-bottom: 4px; }
  .header { display: flex; justify-content: space-between; align-items: flex-start; margin-bottom: 24px; }
  .header-left h1 { margin-bottom: 4px; }
  .period { color: var(--muted); font-size: 0.85rem; font-family: var(--mono); }
  .controls { display: flex; gap: 10px; align-items: center; }
  .btn {
    background: var(--card-bg);
    border: 1px solid var(--border);
    color: var(--text);
    padding: 8px 16px;
    border-radius: 8px;
    cursor: pointer;
    font-size: 0.82rem;
    font-family: var(--mono);
    transition: all 0.15s;
  }
  .btn:hover { border-color: var(--accent); }
  .btn.active { background: var(--accent); border-color: var(--accent); color: #fff; }
  select.btn {
    appearance: none;
    padding-right: 32px;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%238b8d98' d='M6 9L1 4h10z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 10px center;
  }
  .cards {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 16px;
    margin-bottom: 32px;
  }
  .card {
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: 10px;
    padding: 18px 20px;
  }
  .card-label {
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--muted);
    margin-bottom: 8px;
  }
  .card-value {
    font-size: 1.8rem;
    font-weight: 700;
    font-family: var(--mono);
    margin-bottom: 6px;
  }
  .card-trend { font-size: 0.8rem; font-family: var(--mono); }
  .card-trend .muted { color: var(--muted); font-size: 0.72rem; }
  /* Up = good (green), down = bad (red) — usage going up is the goal */
  .card.up .card-trend { color: var(--green); }
  .card.down .card-trend { color: var(--red); }
  .card.flat .card-trend { color: var(--muted); }

  h2 {
    font-size: 1.05rem;
    font-weight: 600;
    margin-bottom: 12px;
    color: var(--text);
    border-bottom: 1px solid var(--border);
    padding-bottom: 8px;
    display: flex;
    justify-content: space-between;
    align-items: center;
  }
  .section { margin-bottom: 32px; }
  .model-id { color: var(--muted); font-family: var(--mono); font-size: 0.8rem; font-weight: 400; }
  table { width: 100%; border-collapse: collapse; font-size: 0.85rem; }
  th {
    text-align: left;
    padding: 10px 14px;
    color: var(--muted);
    font-weight: 500;
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.04em;
    border-bottom: 1px solid var(--border);
    cursor: pointer;
    user-select: none;
  }
  th:hover { color: var(--text); }
  th.sorted { color: var(--accent); }
  th.sorted::after { content: ' ▼'; font-size: 0.7rem; }
  th.sorted.asc::after { content: ' ▲'; }
  td { padding: 10px 14px; border-bottom: 1px solid var(--border); }
  tr:hover td { background: rgba(99,102,241,0.05); }
  td.num { font-family: var(--mono); text-align: right; }
  th:nth-child(n+2) { text-align: right; }
  #endpointTable th:nth-child(2) { text-align: left; }
  /* Narrow preset-order column — single digit width */
  .preset-col { width: 32px; text-align: center !important; }
  /* Highlight rows that are in the current preset order */
  tr.in-preset td { background: rgba(99,102,241,0.08); }
  tr.in-preset:hover td { background: rgba(99,102,241,0.12); }
  .preset-badge {
    color: var(--accent);
    font-weight: 700;
    font-family: var(--mono);
  }
  .empty { text-align: center; color: var(--muted); padding: 24px; }
  .status-ok { color: var(--green); }
  .status-bad { color: var(--red); }
  /* Lozenge badges for provider tag suffixes (display only) */
  .lozenge {
    display: inline-block;
    padding: 1px 5px;
    border-radius: 3px;
    font-size: 0.65rem;
    font-family: var(--mono);
    font-weight: 600;
    margin-left: 2px;
    vertical-align: middle;
  }
  .lozenge-quant { background: var(--border); color: var(--muted); }
  .lozenge-speed { background: var(--accent); color: #fff; }
  .pick-box {
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: 10px;
    padding: 18px 20px;
    margin-bottom: 12px;
  }
  .pick-row {
    display: flex;
    align-items: baseline;
    gap: 8px;
    margin-bottom: 8px;
    font-size: 0.88rem;
  }
  .pick-label {
    color: var(--muted);
    min-width: 180px;
    font-size: 0.78rem;
    text-transform: uppercase;
    letter-spacing: 0.04em;
  }
  .pick-value {
    font-family: var(--mono);
    font-size: 0.85rem;
  }
  .pick-value .changed-badge {
    background: var(--yellow);
    color: #000;
    padding: 2px 8px;
    border-radius: 4px;
    font-size: 0.7rem;
    margin-left: 8px;
    font-weight: 600;
  }
  .pick-value .same-badge {
    background: var(--green);
    color: #000;
    padding: 2px 8px;
    border-radius: 4px;
    font-size: 0.7rem;
    margin-left: 8px;
    font-weight: 600;
  }
  .pick-reasoning {
    color: var(--text);
    font-size: 0.85rem;
    line-height: 1.5;
    margin: 12px 0;
    padding: 0;
    background: rgba(99,102,241,0.06);
    border-left: 3px solid var(--accent);
    border-radius: 4px;
    overflow: hidden;
  }
  .pick-reasoning-header {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 8px 16px;
    cursor: pointer;
    user-select: none;
    font-size: 0.78rem;
    text-transform: uppercase;
    letter-spacing: 0.04em;
    color: var(--muted);
  }
  .pick-reasoning-header:hover { color: var(--text); }
  .pick-reasoning-header::before {
    content: '▶';
    font-size: 0.6rem;
    transition: transform 0.15s;
  }
  .pick-reasoning.open .pick-reasoning-header::before {
    transform: rotate(90deg);
  }
  .pick-reasoning-body {
    display: none;
    padding: 12px 16px;
  }
  .pick-reasoning.open .pick-reasoning-body {
    display: block;
  }
  .pick-controls {
    display: flex;
    gap: 16px;
    align-items: center;
    margin-top: 12px;
    flex-wrap: wrap;
  }
  .pick-controls label {
    font-size: 0.82rem;
    color: var(--muted);
    display: flex;
    align-items: center;
    gap: 6px;
  }
  .pick-btn {
    background: var(--accent);
    border: none;
    color: #fff;
    padding: 8px 20px;
    border-radius: 8px;
    cursor: pointer;
    font-size: 0.82rem;
    font-family: var(--mono);
    transition: opacity 0.15s;
  }
  .pick-btn:hover { opacity: 0.85; }
  .pick-btn:disabled { opacity: 0.4; cursor: default; }
  .pick-status { font-size: 0.78rem; color: var(--muted); font-family: var(--mono); }
  .pick-error { color: var(--red); font-size: 0.82rem; }
  .footer {
    margin-top: 40px;
    color: var(--muted);
    font-size: 0.75rem;
    font-family: var(--mono);
    text-align: center;
  }
  a.ext-link {
    color: var(--accent);
    text-decoration: none;
    border-bottom: 1px dotted var(--accent);
  }
  a.ext-link:hover { border-bottom-style: solid; }
  .section-link {
    font-size: 0.78rem;
    font-family: var(--mono);
    color: var(--accent);
    text-decoration: none;
    margin-left: 12px;
    opacity: 0.7;
  }
  .section-link:hover { opacity: 1; }
  /* Inline checkbox toggle in section headings */
  .keys-toggle {
    display: inline-flex;
    align-items: center;
    gap: 5px;
    font-size: 0.72rem;
    font-family: var(--mono);
    color: var(--muted);
    cursor: pointer;
    margin-left: 12px;
    opacity: 0.85;
  }
  .keys-toggle:hover { opacity: 1; }
  .keys-toggle input { cursor: pointer; }
  /* Slider toggle for AI flow on/off */
  .ai-toggle {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    margin-left: 12px;
    cursor: pointer;
  }
  .ai-toggle input {
    display: none;
  }
  .ai-toggle-slider {
    width: 32px;
    height: 18px;
    background: var(--border);
    border-radius: 9px;
    position: relative;
    transition: background 0.15s;
  }
  .ai-toggle-slider::after {
    content: '';
    position: absolute;
    top: 2px;
    left: 2px;
    width: 14px;
    height: 14px;
    background: var(--muted);
    border-radius: 50%;
    transition: transform 0.15s, background 0.15s;
  }
  .ai-toggle input:checked + .ai-toggle-slider {
    background: var(--accent);
  }
  .ai-toggle input:checked + .ai-toggle-slider::after {
    transform: translateX(14px);
    background: #fff;
  }
  .ai-toggle-label {
    font-size: 0.72rem;
    font-family: var(--mono);
    color: var(--muted);
  }
  .ai-toggle input:checked ~ .ai-toggle-label {
    color: var(--accent);
  }