:root{
    --paper:#e6e9ef; --panel:#eff1f5; --ink:#4c4f69; --muted:#8c8fa1;
    --rule:#acb0be; --accent:#fe640b; --blood:#d20f39;
    --mono:'IBM Plex Mono',ui-monospace,SFMono-Regular,Menlo,monospace;
    --sans:system-ui,-apple-system,Segoe UI,Roboto,Helvetica,Arial,sans-serif;
  }
  *{box-sizing:border-box}
  body{margin:0;background:var(--paper);color:var(--ink);font-family:var(--sans);
       line-height:1.55;-webkit-font-smoothing:antialiased}
  .wrap{max-width:46rem;margin:0 auto;padding:2.5rem 1.25rem 5rem}
  a{color:var(--accent);text-decoration:none}
  a:hover{text-decoration:underline}
  :focus-visible{outline:2px solid var(--accent);outline-offset:2px}

  h1.title{font-family:var(--mono);font-weight:600;font-size:2rem;
           line-height:1.15;letter-spacing:-.02em;margin:2rem 0 .5rem}
  .intro{font-size:1.05rem;color:#33333b;max-width:40rem}

  /* cipher index rows */
  .list{margin-top:2rem;border-top:1px solid var(--rule)}
  .row{display:grid;grid-template-columns:1fr auto;gap:.35rem 1.25rem;
       align-items:baseline;padding:1.1rem 0;border-bottom:1px solid var(--rule)}
  .row .name{font-family:var(--mono);font-size:1.05rem;font-weight:500}
  .row .meta{grid-column:1/-1;display:flex;flex-wrap:wrap;gap:.35rem 1rem;
             font-size:.85rem;color:var(--muted);align-items:baseline}
  .row .solve{text-align:right;font-size:.85rem;white-space:nowrap}
  .solve.done{color:var(--blood)} .solve.open{color:var(--muted)}

  /* difficulty meter */
  .diff{display:inline-flex;align-items:center;gap:.5rem}
  .meter{display:inline-flex;gap:2px}
  .seg{width:7px;height:14px;border-radius:1px;background:var(--rule)}
  .seg.on{background:var(--accent)}
  .diff .n{font-family:var(--mono);font-size:.8rem;color:var(--ink)}

  /* cipher page */
  .cipher-meta{display:flex;flex-wrap:wrap;gap:.75rem 1.5rem;align-items:baseline;
               color:var(--muted);font-size:.9rem;margin-bottom:1.75rem}
  .puzzle{background:var(--panel);border:1px solid var(--rule);border-radius:6px;
          padding:1.25rem 1.4rem;font-family:var(--mono);font-size:.95rem;
          white-space:pre-wrap;word-break:break-word;overflow-x:auto}
  .stage{background:var(--panel);border:1px solid var(--rule);border-radius:6px;
         padding:1.1rem 1.25rem;margin-top:1.25rem}
  .stage h3{margin:0 0 .6rem;font-size:.95rem;font-weight:600}
  .stage.locked{opacity:.5}
  .stage.locked input,.stage.locked button{pointer-events:none}
  .stage .field{display:flex;gap:.5rem;flex-wrap:wrap}
  input[type=text]{flex:1;min-width:12rem;font-family:var(--mono);font-size:.95rem;
        padding:.55rem .65rem;border:1px solid var(--rule);border-radius:5px;background:#fff;color:var(--ink)}
  button{font-family:var(--sans);font-size:.9rem;font-weight:500;cursor:pointer;
         padding:.55rem 1rem;border:1px solid var(--accent);background:var(--accent);
         color:#fff;border-radius:5px}
  button:hover{background:#fe640bcc;border-color:#fe640bcc}
  button:disabled{opacity:.5;cursor:default}
  .stagemsg{margin-top:.6rem;font-size:.88rem;min-height:1.2em}
  .lock-note{font-size:.82rem;color:var(--muted);margin-top:.4rem}

  /* first blood box */
  .blood{margin-top:2.25rem;border:1px solid var(--rule);border-radius:6px;overflow:hidden}
  .blood h2{margin:0;font-size:.9rem;font-weight:600;letter-spacing:.04em;
            color:var(--ink);padding:.7rem 1.1rem;border-bottom:1px solid var(--rule);
            background:var(--panel)}
  .blood .rec{display:grid;grid-template-columns:1fr auto;
              align-items:baseline;gap:.5rem 1rem;padding:.85rem 1.1rem;
              border-bottom:1px solid var(--rule);
              background:var(--panel);font-size:.9rem}
  .blood .rec.multi{grid-template-columns:13rem 1fr auto}
  .blood .rec.multi.unclaimed{grid-template-columns:13rem 1fr}
  .blood .rec:last-child{border-bottom:0}
  .blood.board .rec{grid-template-columns:2.5rem 1fr auto}
  .blood.board .rec.empty{display:flex;justify-content:center;text-align:center}
  .blood.board .rec.empty .stagelabel{font-size:.88rem}
  .blood .rec .who{justify-self:start}
  .blood .rec.multi.unclaimed .who{justify-self:end}
  .blood .rec .after{justify-self:end}
  .blood .rec .rank{font-family:var(--mono);color:var(--muted);font-size:.85rem;
                    justify-self:start}
  .blood .who{font-family:var(--mono);font-weight:500}
  .blood .who.claimed{color:var(--blood)}
  .blood .stagelabel{font-size:.82rem;color:var(--muted)}
  .blood .aftersm{font-size:.78rem;color:var(--muted)}
  .blood .after{font-size:.85rem;color:var(--muted);white-space:nowrap}

  @media (prefers-reduced-motion:no-preference){
    .stagemsg{transition:color .15s}
  }
  @media (max-width:32rem){
    h1.title{font-size:1.6rem}
    .row .solve{grid-column:1/-1;text-align:left}
  }