:root{
    --bg:var(--gray-0); --bg-2:var(--gray-20); --panel:var(--gray-0);
    --text:var(--gray-750); --text-2:var(--gray-500); --text-3:var(--gray-300);
    --brand:var(--violet-400);
    --line:color-mix(in srgb, var(--gray-900) 8%, transparent); --line-strong:color-mix(in srgb, var(--gray-900) 13%, transparent);
    --shadow-float:0 0 0 1px color-mix(in srgb, var(--gray-900) 5%, transparent), 0 2px 6px color-mix(in srgb, var(--gray-900) 5%, transparent), 0 12px 32px color-mix(in srgb, var(--gray-900) 10%, transparent);
    --ease-exit:cubic-bezier(.215,.61,.355,1);
    --ease-out:cubic-bezier(.16,1,.3,1);
    --ease-spring:cubic-bezier(.34,1.26,.64,1);
    --ok:var(--green-300);
  }
  html[data-theme="dark"]{
    --bg:var(--gray-900); --bg-2:var(--gray-880); --panel:var(--gray-870);
    --text:var(--gray-20); --text-2:var(--gray-350); --text-3:var(--gray-550);
    --brand:var(--violet-450);
    --line:color-mix(in srgb, var(--gray-0) 8%, transparent); --line-strong:color-mix(in srgb, var(--gray-0) 15%, transparent);
    --shadow-float:0 0 0 1px color-mix(in srgb, var(--gray-0) 8%, transparent), 0 2px 6px color-mix(in srgb, var(--gray-900) 40%, transparent), 0 12px 32px color-mix(in srgb, var(--gray-900) 55%, transparent);
  }
  *{margin:0;padding:0;box-sizing:border-box}
  html{color-scheme:light dark}
  body{
    font-family:var(--font);
    font-feature-settings:"cv01","ss03";
    background:var(--bg); color:var(--text);
    -webkit-font-smoothing:antialiased;
    overflow-x:hidden;
  }
  button{font:inherit;color:inherit;background:none;border:0;cursor:default}
  input{font:inherit;color:inherit}
  a{color:inherit;text-decoration:none}
  ::selection{background:color-mix(in srgb, var(--brand) 25%, transparent)}
  .tab{font-variant-numeric:tabular-nums}
  .mono{font-family:var(--font-mono)}

  /* page stub above each footer */
  .stub{max-width:1080px;margin:0 auto;padding:150px 24px 90px}
  .stub h1{font-size:clamp(40px,4.6vw,56px);font-weight:500;letter-spacing:-0.022em;line-height:1.06;max-width:16ch}
  .stub p{margin-top:16px;font-size:15px;line-height:1.55;color:var(--text-2);max-width:52ch}
  .stub .blk{margin-top:70px;height:38vh;border-radius:12px;background:var(--bg-2);box-shadow:inset 0 0 0 1px var(--line);display:grid;place-items:center;color:var(--text-3);font-size:13px}

  .f-base{
    display:flex;align-items:center;gap:22px;flex-wrap:wrap;
    padding:18px 0 0;margin-top:26px;border-top:1px solid var(--line);
    font-size:12px;color:var(--text-3);
  }
  .f-base a{color:var(--text-2);font-weight:500;transition:color .15s}
  .f-base a:is(:hover, [data-hover]){color:var(--text)}
  .f-base .sp{flex:1}
  /* =========================================================
     F · SIGNATURE — signed by hand
     ========================================================= */
  #ff-foot{padding:80px 24px 26px;border-top:1px solid var(--line)}
  #ff-inner{max-width:1080px;margin:0 auto;display:grid;grid-template-columns:1fr auto;gap:40px;align-items:end}
  #ffSig{width:min(380px,70vw);overflow:visible}
  #ffSig path{
    fill:none;stroke:var(--text);stroke-width:2.6;stroke-linecap:round;stroke-linejoin:round;
    stroke-dasharray:1;stroke-dashoffset:1;
  }
  #ffSig path.drawn{transition:stroke-dashoffset 1.5s cubic-bezier(.4,0,.2,1)}
  #ffSig path.drawn.go{stroke-dashoffset:0}
  #ffStamp{
    display:inline-flex;align-items:center;gap:8px;margin-top:14px;
    font-size:11px;font-weight:550;letter-spacing:1.6px;text-transform:none;color:var(--text-3);
    opacity:0;transform:rotate(-2deg) scale(1.15);
    transition:opacity .3s var(--ease-exit) 1.5s, transform .35s var(--ease-spring) 1.5s;
  }
  #ffStamp.go{opacity:1;transform:rotate(-2deg) scale(1)}
  #ffStamp::before{content:'';width:22px;height:1.5px;background:var(--text-3)}
  #ff-colo{font-size:12px;line-height:2;color:var(--text-2);text-align:right}
  #ff-colo b{color:var(--text);font-weight:550}

  @media (max-width:760px){
    #ff-inner{grid-template-columns:1fr}
    #ff-colo{text-align:left}
  }

  @media (prefers-reduced-motion: reduce){
    *{transition-duration:.01ms !important;animation-duration:.01ms !important}
  }
body { font-size: 15px; line-height: normal; }