:root {
    --bg: #0d1117;
    --surface: rgba(13,17,30,0.85);
    --surface2: rgba(22,28,45,0.9);
    --border: rgba(99,120,180,0.2);
    --border2: rgba(99,120,180,0.38);
    --text: #e6eaf4;
    --text-dim: #8892aa;
    --text-dimmer: #505870;
    --mech: #4fc3a1;
    --mech-dim: rgba(79,195,161,0.15);
    --elec: #f5845a;
    --elec-dim: rgba(245,132,90,0.15);
    --accent: #7c9ef5;
    --accent-dim: rgba(124,158,245,0.12);
    --up: #4cc96a;
    --down: #e05d7a;
    --neutral: #a78bfa;
    --shadow: rgba(0,0,0,0.6);
    --radius: 6px;
    --mono: 'Inter Mono', monospace;
    --sans: 'Exo 2', sans-serif;
  }

  [data-theme="light"] {
    --bg: #f4f6fb;
    --surface: rgba(255,255,255,0.92);
    --surface2: rgba(235,240,252,0.95);
    --border: rgba(99,120,180,0.2);
    --border2: rgba(99,120,180,0.4);
    --text: #111827;
    --text-dim: #374558;
    --text-dimmer: #7a849a;
    --mech: #1a9e7a;
    --mech-dim: rgba(26,158,122,0.12);
    --elec: #d95f30;
    --elec-dim: rgba(217,95,48,0.1);
    --accent: #3b5fd4;
    --accent-dim: rgba(59,95,212,0.1);
    --up: #1a8c3a;
    --down: #c0284a;
    --neutral: #6d47c7;
    --shadow: rgba(0,0,0,0.1);
  }

  @media (prefers-color-scheme: light) {
    :root:not([data-theme="dark"]) {
      --bg: #f4f6fb;
      --surface: rgba(255,255,255,0.92);
      --surface2: rgba(235,240,252,0.95);
      --border: rgba(99,120,180,0.2);
      --border2: rgba(99,120,180,0.4);
      --text: #111827;
      --text-dim: #374558;
      --text-dimmer: #7a849a;
      --mech: #1a9e7a;
      --mech-dim: rgba(26,158,122,0.12);
      --elec: #d95f30;
      --elec-dim: rgba(217,95,48,0.1);
      --accent: #3b5fd4;
      --accent-dim: rgba(59,95,212,0.1);
      --up: #1a8c3a;
      --down: #c0284a;
      --neutral: #6d47c7;
      --shadow: rgba(0,0,0,0.1);
    }
  }

  .theme-btn { background: transparent; border: 1px solid var(--border2); color: var(--text-dim); padding: 4px 10px; border-radius: var(--radius); cursor: pointer; font-family: var(--mono); font-size: 11px; transition: all 0.15s; flex-shrink: 0; }
  .theme-btn:hover { border-color: var(--text-dim); color: var(--text); }
  * { box-sizing: border-box; margin: 0; padding: 0; }
  body {
    background-color: var(--bg);
    background-image: linear-gradient(135deg, rgba(59,130,246,0.03) 0%, rgba(124,158,245,0.02) 40%, rgba(167,139,250,0.025) 100%);
    background-attachment: fixed;
    background-size: cover;
    color: var(--text);
    font-family: var(--sans);
    font-size: 13px;
    min-height: 100vh;
    overflow-x: hidden;
  }

  header { background: rgba(8,11,20,0.75); backdrop-filter: blur(12px); -webkit-backdrop-filter: blur(12px); border-bottom: 1px solid var(--border); padding: 22px 40px 20px; display: flex; align-items: center; gap: 32px; flex-wrap: wrap; position: sticky; top: 0; z-index: 50; }
  .header-title { flex: 1; min-width: 280px; }
  .header-title h1 { font-family: var(--sans); font-weight: 700; font-style: normal; font-size: 22px; line-height: 1.2; color: var(--text); letter-spacing: 0.01em; text-shadow: 0 0 20px rgba(124,158,245,0.4); }
  .header-title h1 em { color: var(--accent); font-style: normal; text-shadow: 0 0 12px rgba(124,158,245,0.7); }
  .header-title p { margin-top: 8px; color: var(--text-dim); font-size: 11px; letter-spacing: 0.06em; text-transform: uppercase; }
  .header-stats { display: flex; gap: 24px; flex-wrap: wrap; }
  .stat-pill { display: flex; flex-direction: column; align-items: flex-end; gap: 2px; }
  .stat-pill .val { font-size: 22px; font-weight: 500; letter-spacing: -0.03em; line-height: 1; }
  .stat-pill .lbl { font-size: 10px; letter-spacing: 0.08em; text-transform: uppercase; color: var(--text-dim); }
  .stat-pill.mech .val { color: var(--mech); }
  .stat-pill.elec .val { color: var(--elec); }
  .stat-pill.total .val { color: var(--accent); }

  .upload-bar { background: var(--accent-dim); border-bottom: 1px solid var(--border); padding: 8px 40px; font-size: 11px; color: var(--accent); display: flex; align-items: center; gap: 8px; flex-wrap: wrap; }
  .upload-bar strong { font-weight: 500; }
  .upload-bar .upload-btn { margin-left: auto; background: transparent; border: 1px solid var(--accent); color: var(--accent); padding: 3px 10px; border-radius: var(--radius); cursor: pointer; font-family: var(--mono); font-size: 11px; transition: background 0.2s; }
  .upload-btn:hover { background: var(--accent-dim); }
  #file-input { display: none; }

  .app { display: grid; grid-template-columns: 260px 1fr; min-height: calc(100vh - 120px); }

  aside { border-right: 1px solid var(--border); padding: 24px 20px; overflow-y: auto; max-height: calc(100vh - 120px); position: sticky; top: 0; }
  .filter-section { margin-bottom: 24px; }
  .filter-label { font-size: 10px; letter-spacing: 0.1em; text-transform: uppercase; color: var(--text-dimmer); margin-bottom: 8px; padding-bottom: 6px; border-bottom: 1px solid var(--border); }
  .chip-group { display: flex; flex-wrap: wrap; gap: 5px; }
  .chip { padding: 4px 10px; border-radius: 20px; border: 1px solid var(--border2); background: transparent; color: var(--text-dim); font-family: var(--mono); font-size: 11px; cursor: pointer; transition: all 0.15s; }
  .chip:hover { border-color: var(--text-dim); color: var(--text); }
  .chip.active-mech { border-color: var(--mech); color: var(--mech); background: var(--mech-dim); }
  .chip.active-elec { border-color: var(--elec); color: var(--elec); background: var(--elec-dim); }
  .chip.active { border-color: var(--accent); color: var(--accent); background: var(--accent-dim); }

  .range-filter { margin-top: 6px; }
  .range-filter label { display: flex; justify-content: space-between; font-size: 11px; color: var(--text-dim); margin-bottom: 5px; }
  .range-filter label span { color: var(--text); font-size: 11px; }
  input[type=range] { width: 100%; accent-color: var(--accent); cursor: pointer; }

  .sidebar-reset { width: 100%; background: transparent; border: 1px solid var(--border2); color: var(--text-dim); padding: 8px; border-radius: var(--radius); cursor: pointer; font-family: var(--mono); font-size: 11px; margin-top: 4px; transition: all 0.15s; }
  .sidebar-reset:hover { border-color: var(--down); color: var(--down); }

  main { overflow: auto; display: flex; flex-direction: column; }

  .tabs { display: flex; gap: 0; border-bottom: 1px solid var(--border); padding: 0 32px; flex-shrink: 0; overflow-x: auto; }
  .tab { padding: 14px 18px; cursor: pointer; font-size: 11px; letter-spacing: 0.06em; text-transform: uppercase; color: var(--text-dim); border-bottom: 2px solid transparent; transition: all 0.15s; background: none; border-top: none; border-left: none; border-right: none; font-family: var(--mono); white-space: nowrap; }
  .tab:hover { color: var(--text); }
  .tab.active { color: var(--accent); border-bottom-color: var(--accent); text-shadow: 0 0 10px rgba(124,158,245,0.5); }

  .panel { padding: 24px 32px; }
  .panel-hidden { display: none; }

  .chart-title { font-family: var(--sans); font-weight: 600; font-style: normal; font-size: 17px; color: var(--text); margin-bottom: 4px; letter-spacing: 0.01em; }
  .chart-subtitle { font-size: 11px; color: var(--text-dim); margin-bottom: 20px; letter-spacing: 0.04em; }
  svg { display: block; width: 100%; }

  .tooltip { position: fixed; background: var(--surface2); border: 1px solid var(--border2); border-radius: var(--radius); padding: 10px 14px; font-size: 11px; pointer-events: none; z-index: 1000; max-width: 320px; line-height: 1.6; box-shadow: 0 8px 32px var(--shadow); }
  .tooltip .tt-title { font-weight: 500; color: var(--text); margin-bottom: 4px; font-size: 12px; }
  .tooltip .tt-doi { color: var(--accent); font-size: 10px; margin-bottom: 6px; word-break: break-all; }
  .tooltip .tt-row { display: flex; justify-content: space-between; gap: 12px; color: var(--text-dim); }
  .tooltip .tt-row span:last-child { color: var(--text); }

  .legend { display: flex; gap: 20px; flex-wrap: wrap; margin-bottom: 16px; }
  .legend-item { display: flex; align-items: center; gap: 6px; font-size: 11px; color: var(--text-dim); }
  .legend-dot { width: 10px; height: 10px; border-radius: 50%; flex-shrink: 0; background: var(--dot-color, var(--accent)); }
  .legend-line { width: 18px; height: 2px; flex-shrink: 0; }

  .data-badge { display: inline-block; background: var(--surface2); border: 1px solid var(--border2); border-radius: 4px; padding: 2px 8px; font-size: 10px; color: var(--text-dim); margin-left: 8px; vertical-align: middle; }

  .axis text { fill: var(--text-dim); font-family: var(--mono); font-size: 10px; }
  .axis path, .axis line { stroke: var(--border2); }
  .grid line { stroke: var(--border); stroke-dasharray: 2,4; }
  .grid path { stroke: none; }

  .dose-controls { display: flex; gap: 12px; flex-wrap: wrap; margin-bottom: 20px; align-items: center; }
  .dose-controls select, .dose-controls button { background: var(--surface2); border: 1px solid var(--border2); color: var(--text); padding: 6px 12px; border-radius: var(--radius); font-family: var(--mono); font-size: 11px; cursor: pointer; transition: all 0.15s; }
  .dose-controls button { color: var(--text-dim); }
  .dose-controls button.active { border-color: var(--accent); color: var(--accent); background: var(--accent-dim); }
  .dose-controls label { font-size: 11px; color: var(--text-dim); }

  .empty-state { display: flex; flex-direction: column; align-items: center; justify-content: center; min-height: 200px; color: var(--text-dimmer); font-size: 12px; gap: 8px; }
  .empty-state .big { font-size: 32px; }

  .contrib-box { margin: 0 0 24px; background: var(--surface2); border: 1px solid var(--border2); border-radius: var(--radius); padding: 20px 24px; }
  .contrib-box h3 { font-family: var(--sans); font-weight: 600; font-size: 14px; color: var(--accent); margin-bottom: 10px; letter-spacing: 0.02em; }
  .contrib-box p { color: var(--text-dim); line-height: 1.7; font-size: 12px; margin-bottom: 10px; }
  .contrib-box code { background: var(--bg); border: 1px solid var(--border); padding: 2px 6px; border-radius: 3px; color: var(--mech); font-size: 11px; }
  .schema-table { width: 100%; border-collapse: collapse; margin-top: 8px; }
  .schema-table th, .schema-table td { text-align: left; padding: 5px 10px; font-size: 10px; border-bottom: 1px solid var(--border); }
  .schema-table th { color: var(--text-dimmer); letter-spacing: 0.06em; text-transform: uppercase; }
  .schema-table td { color: var(--text-dim); }
  .schema-table td:first-child { color: var(--mech); }
  .schema-table tr:last-child td { border-bottom: none; }

  .note-box { background: rgba(107,125,179,0.07); border: 1px solid rgba(107,125,179,0.2); border-radius: var(--radius); padding: 10px 14px; font-size: 11px; color: var(--text-dim); margin-bottom: 16px; line-height: 1.6; }
  .note-box strong { color: var(--neutral); }

  .warn-box { background: var(--accent-dim); border: 1px solid rgba(154,115,64,0.3); border-radius: var(--radius); padding: 9px 14px; font-size: 11px; color: var(--accent); margin-bottom: 14px; line-height: 1.6; display: none; }
  .warn-box.visible { display: block; }

  .mixed-toggle-row { display: flex; align-items: center; gap: 8px; margin-top: 10px; padding-top: 10px; border-top: 1px solid var(--border); }
  .mixed-toggle-row label { font-size: 10px; color: var(--text-dimmer); letter-spacing: 0.06em; text-transform: uppercase; cursor: pointer; }
  .mixed-toggle-row input[type=checkbox] { accent-color: var(--accent); cursor: pointer; width: 13px; height: 13px; }
  .mixed-note { font-size: 10px; color: var(--text-dimmer); margin-top: 4px; line-height: 1.5; }

  .citation-bar { background: rgba(0,0,0,0.3); backdrop-filter: blur(6px); border-bottom: 1px solid var(--border); padding: 7px 40px; font-size: 11px; color: var(--text-dimmer); display: flex; align-items: center; gap: 10px; flex-wrap: wrap; }
  .citation-bar span { flex: 1; line-height: 1.6; }
  .citation-bar a { color: var(--accent); text-decoration: none; }
  .citation-bar a:hover { text-decoration: underline; }
  .source-toggle { display: flex; align-items: center; gap: 6px; background: var(--surface2); border: 1px solid var(--border2); border-radius: 20px; padding: 3px 4px; flex-shrink: 0; }
  .source-btn { padding: 3px 10px; border-radius: 16px; border: none; font-family: var(--mono); font-size: 10px; cursor: pointer; color: var(--text-dim); background: transparent; transition: all 0.15s; letter-spacing: 0.04em; white-space: nowrap; }
  .source-btn.active { background: var(--accent); color: #fff; font-weight: 500; }

  /* Citation bar label */
  .cit-label { color: var(--text-dim); font-weight: 500; }

  /* Dose outcome label spacing */
  .dose-outcome-label { margin-left: 12px; font-size: 11px; color: var(--text-dim); }

  /* Tooltip hidden via HTML hidden attribute instead of inline style */
  .tooltip[hidden] { display: none; }

  /* Stat pill semantic colour classes (set via className, not inline style) */
  .stat-pill.total .val { color: var(--accent); }
  .stat-pill.community .val { color: var(--up); }
  .stat-pill.mixed-excl .val { color: var(--text-dimmer); font-size: 16px; }
  .stat-pill.papers .val { color: var(--neutral); }

  /* Legend hint item */
  .legend-hint { margin-left: auto; color: var(--text-dimmer); font-size: 10px; }