:root{
    --grid:#d0d0d0;--grid-strong:#909090;--head-bg:#e8eaed;--head-text:#404040;--row-head:#f3f4f6;
    --text:#1a1a1a;--muted:#6b6b6b;--green:#1e7a3c;--green-bg:#e8f5ec;--red:#b41e1e;--red-bg:#fbeaea;
    --accent-dark:#0d2438;--accent:#1e4d6b;--gold:#b8860b;
    --sans:-apple-system,BlinkMacSystemFont,'Inter','Segoe UI',sans-serif;
    --mono:'SF Mono',Menlo,Consolas,monospace;
    --serif:'Charter','Iowan Old Style',Georgia,serif;
  }
  *{box-sizing:border-box}
  [hidden]{display:none !important}
  body{margin:0;background:#f0f0f0;color:var(--text);font-family:var(--sans);font-size:14px;line-height:1.5}
  a{color:var(--accent)}
  .top{background:var(--accent-dark);color:#fff}
  .top .in{max-width:1000px;margin:0 auto;padding:10px 16px;display:flex;gap:14px;align-items:center;justify-content:space-between;flex-wrap:wrap}
  .top .brand{font-family:var(--mono);font-weight:700;letter-spacing:.08em;font-size:13px;color:#fff;text-decoration:none}
  .top nav{display:flex;gap:14px;flex-wrap:wrap;font-size:12.5px}
  .top nav a{color:rgba(255,255,255,.75);text-decoration:none}
  .top nav a:hover{color:#fff}
  .hero{background:var(--accent-dark);color:#fff;padding:18px 0 26px}
  .hero .in{max-width:1000px;margin:0 auto;padding:0 16px}
  .eyebrow{font-family:var(--mono);font-size:11px;letter-spacing:.14em;text-transform:uppercase;color:#b3e5c7;font-weight:700}
  .hero h1{font-family:var(--serif);font-size:clamp(28px,5vw,44px);line-height:1.08;margin:8px 0 0;font-weight:700}
  .hero p{max-width:70ch;color:rgba(255,255,255,.82);font-size:15.5px;margin:12px 0 0}
  main{max-width:1000px;margin:0 auto;padding:0 16px 40px}

  .block{background:#fff;border:1px solid var(--grid);border-radius:4px;margin:22px 0 0}
  .block-title{font-family:var(--mono);font-size:11px;letter-spacing:.1em;text-transform:uppercase;font-weight:700;color:var(--head-text);background:var(--head-bg);padding:9px 14px;border-bottom:1px solid var(--grid)}
  .block-body{padding:14px}
  .block-body p{margin:0 0 10px;max-width:78ch}
  .block-body p:last-child{margin-bottom:0}

  /* settings */
  .params{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:14px 18px}
  .pg label{display:block;font-family:var(--mono);font-size:10.5px;letter-spacing:.08em;text-transform:uppercase;color:var(--muted);font-weight:700;margin-bottom:4px}
  .pg select{width:100%;padding:6px 8px;border:1px solid var(--grid-strong);border-radius:3px;background:#fff;font:inherit}
  .pg .rw{display:flex;align-items:center;gap:8px}
  .pg input[type=range]{flex:1;min-width:0;accent-color:var(--accent)}
  .pg .rv{font-family:var(--mono);font-size:12.5px;font-weight:700;min-width:74px;text-align:right;font-variant-numeric:tabular-nums}
  .pg .hint{font-size:11.5px;color:var(--muted);margin-top:3px;line-height:1.35}
  .seg{display:flex;border:1px solid var(--grid-strong);border-radius:3px;overflow:hidden}
  .seg button{flex:1;border:0;background:#fff;font:inherit;font-size:12.5px;padding:6px 4px;cursor:pointer;border-right:1px solid var(--grid)}
  .seg button:last-child{border-right:0}
  .seg button.on{background:var(--accent);color:#fff;font-weight:600}
  .actions{display:flex;gap:10px;flex-wrap:wrap;margin-top:14px}
  .btn{border:1px solid var(--accent);background:var(--accent);color:#fff;border-radius:3px;padding:7px 12px;font:inherit;font-size:13px;cursor:pointer;text-decoration:none}
  .btn.ghost{background:#fff;color:var(--accent)}
  .status{font-size:12px;color:var(--muted);align-self:center}

  /* the answer, in words */
  /* the answer as a bill per km: one colour per kind of cost, the same as in the charts */
  :root{--c-diesel:#6b5b45;--c-diesel-bg:#f4efe7;--c-power:#1d5f9e;--c-power-bg:#e8f1fa;--c-truck:#9a7420;--c-truck-bg:#fbf4e3}
  .bill{border-top:1px solid var(--grid)}
  .bill .ln{display:grid;grid-template-columns:44px 1fr auto;gap:0 12px;align-items:center;padding:10px 14px;border-bottom:1px solid var(--grid);border-left:5px solid transparent}
  .bill .ic{font-size:24px;line-height:1;text-align:center}
  .bill .op{font-size:22px;font-weight:800;color:var(--muted);text-align:center}
  .bill .t{font-weight:700;font-size:14.5px}
  .bill .x{font-size:12.5px;color:var(--muted);line-height:1.4;margin-top:1px}
  .bill .v{font-size:22px;font-weight:800;font-variant-numeric:tabular-nums;white-space:nowrap;text-align:right}
  .bill .v small{display:block;font-size:11.5px;font-weight:600;color:var(--muted)}
  .bill .diesel{border-left-color:var(--c-diesel);background:var(--c-diesel-bg)} .bill .diesel .v{color:var(--c-diesel)}
  .bill .power{border-left-color:var(--c-power);background:var(--c-power-bg)} .bill .power .v{color:var(--c-power)}
  .bill .truck{border-left-color:var(--c-truck);background:var(--c-truck-bg)} .bill .truck .v{color:var(--c-truck)}
  .bill .sub .v{font-size:20px}
  .bill .good{border-left-color:var(--green);background:var(--green-bg)} .bill .good .v{color:var(--green)}
  .bill .bad{border-left-color:var(--red);background:var(--red-bg)} .bill .bad .v{color:var(--red)}
  .bill .result .t{font-size:16px} .bill .result .v{font-size:26px}
  .say{padding:12px 14px;font-size:15.5px;font-family:var(--serif);line-height:1.5}
  .say b{font-family:var(--sans)}
  /* colour key above the charts */
  .key{display:flex;flex-wrap:wrap;gap:6px 16px;padding:10px 14px;font-size:12.5px;color:var(--text);border-bottom:1px solid var(--grid)}
  .key span{display:inline-flex;align-items:center;gap:6px}
  .key i{display:inline-block;width:22px;height:0;border-top:3px solid;flex:0 0 auto}
  .key i.band{height:10px;border:0;border-radius:2px}
  .key i.bar{height:10px;border:0;width:14px;border-radius:2px}
  /* table headers in the same colours */
  table.excel th.hd{background:var(--c-diesel-bg);color:var(--c-diesel)}
  table.excel th.hp{background:var(--c-power-bg);color:var(--c-power)}
  table.excel th.ht{background:var(--c-truck-bg);color:var(--c-truck)}
  table.excel th small{display:block;font-weight:400;font-size:10.5px;opacity:.85}
  table.excel th{white-space:normal;vertical-align:bottom;min-width:70px}

  /* the poster */
  .poster-wrap{background:#000;border-radius:4px;overflow:hidden}
  canvas{display:block;width:100%;height:auto}

  /* excel tables */
  .scroll{overflow-x:auto}
  table.excel{border-collapse:collapse;width:100%;font-size:13px;min-width:720px}
  table.excel th,table.excel td{border:1px solid var(--grid);padding:6px 8px;text-align:right;font-variant-numeric:tabular-nums;white-space:nowrap}
  table.excel th{background:var(--head-bg);color:var(--head-text);font-weight:600;font-size:12px}
  table.excel td:first-child,table.excel th:first-child{text-align:left;background:var(--row-head)}
  table.excel tr.sel td{outline:2px solid var(--accent);outline-offset:-2px}
  table.excel td.pos{color:var(--green);background:var(--green-bg);font-weight:700}
  table.excel td.neg{color:var(--red);background:var(--red-bg);font-weight:700}
  table.excel button{border:0;background:none;color:var(--accent);font:inherit;cursor:pointer;padding:0;text-decoration:underline}
  .note{font-size:12px;color:var(--muted);margin-top:8px}

  /* all countries, small */
  .grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:10px}
  .card{background:#000;border-radius:4px;cursor:pointer;border:2px solid transparent;padding:0}
  .card.sel{border-color:#5aa9ff}
  .card:focus-visible{outline:2px solid var(--accent);outline-offset:2px}

  .how{counter-reset:s}
  .how li{margin:0 0 8px}
  .sources{font-size:12.5px;color:var(--muted)}
  .sources li{margin:0 0 5px}
  footer{max-width:1000px;margin:0 auto;padding:10px 16px 30px;font-size:12px;color:var(--muted)}

  @media (max-width:760px){
    .params{grid-template-columns:1fr 1fr}
    .bill .ln{grid-template-columns:30px 1fr;padding:10px 10px}
    .bill .ic,.bill .op{font-size:20px}
    .bill .v{grid-column:2;text-align:left;margin-top:4px}
    .grid{grid-template-columns:1fr 1fr}
  }
  @media (max-width:460px){
    .params{grid-template-columns:1fr}
  }