: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) 12%, transparent);
    --hover:color-mix(in srgb, var(--gray-750) 4.5%, transparent);
    --scrim:color-mix(in srgb, var(--gray-850) 28%, transparent);
    --shadow-panel:0 0 0 1px color-mix(in srgb, var(--gray-900) 6%, transparent), 0 4px 10px color-mix(in srgb, var(--gray-900) 4%, transparent), 0 16px 40px color-mix(in srgb, var(--gray-900) 8%, 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-out:cubic-bezier(.16,1,.3,1);
    --ease-exit:cubic-bezier(.215,.61,.355,1);
    --ease-spring:cubic-bezier(.34,1.26,.64,1);
  }
  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) 14%, transparent);
    --hover:color-mix(in srgb, var(--gray-0) 5.5%, transparent);
    --scrim:color-mix(in srgb, var(--gray-900) 50%, transparent);
    --shadow-panel:0 0 0 1px color-mix(in srgb, var(--gray-0) 7%, transparent), 0 4px 10px color-mix(in srgb, var(--gray-900) 40%, transparent), 0 16px 40px color-mix(in srgb, var(--gray-900) 50%, 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;
    min-height:200vh;
  }
  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)}
  .variant{display:none}
  .variant.on{display:block}

  /* page stub */
  main{padding:180px 24px 0;max-width:1080px;margin:0 auto}
  .kicker{display:inline-flex;align-items:center;gap:8px;font-size:12px;font-weight:550;color:var(--text-2);border:1px solid var(--line);border-radius:99px;padding:5px 12px 5px 6px;margin-bottom:28px}
  .kicker .pill{background:var(--brand);color:var(--gray-0);border-radius:99px;padding:2px 8px;font-size:11px;font-weight:550}
  h1{font-size:64px;font-weight:500;letter-spacing:-1.408px;line-height:1.06;max-width:14ch;text-wrap:balance}
  .sub{margin-top:22px;font-size:15px;line-height:1.55;color:var(--text-2);max-width:52ch;text-wrap:pretty}
  .fold{height:60vh}


  @media (prefers-reduced-motion: reduce){
    *{transition-duration:.01ms !important;animation-duration:.01ms !important}
  }
  .isl-mark{width:20px;height:20px;border-radius:6px;background:linear-gradient(135deg,var(--brand),color-mix(in srgb,var(--brand) 60%, var(--violet-300)))}
  .isl-link{height:34px;padding:0 12px;border-radius:9999px;font-size:13px;font-weight:500;color:var(--text-2);transition:color .15s,background .15s}
  .isl-link:is(:hover, [data-hover]),.isl-link[aria-expanded="true"]{color:var(--text);background:var(--hover)}
  .isl-link:focus-visible{outline:2px solid var(--brand);outline-offset:-1px}
  .isl-cta{height:34px;padding:0 15px;border-radius:9999px;background:var(--text);color:var(--bg);font-size:13px;font-weight:500;margin-left:8px;transition:opacity .15s}
  .isl-cta:is(:hover, [data-hover]){opacity:.88}
  /* =================================================================
     B · COMMAND — the bar is a live filterable index of the sitemap
     ================================================================= */
  .cmd-wrap{position:fixed;inset:0 0 auto 0;z-index:300}
  .cmd-bar{
    height:64px;display:flex;align-items:center;gap:4px;padding:0 24px;
    background:color-mix(in srgb, var(--bg) 86%, transparent);
    backdrop-filter:blur(20px) saturate(1.6);
    -webkit-backdrop-filter:blur(20px) saturate(1.6);
    box-shadow:0 1px 0 var(--line);
  }
  .cmd-logo{display:flex;align-items:center;gap:10px;font-weight:550;font-size:15px;letter-spacing:-.2px;margin-right:16px}
  .cmd-field{
    flex:1;max-width:520px;height:38px;
    display:flex;align-items:center;gap:9px;
    border-radius:8px;padding:0 12px;
    background:var(--bg-2);
    box-shadow:inset 0 0 0 1px var(--line);
    color:var(--text-3);
    cursor:text;
    transition:box-shadow .15s;
  }
  .cmd-field:is(:hover, [data-hover]){box-shadow:inset 0 0 0 1px var(--line-strong)}
  .cmd-wrap.open .cmd-field{box-shadow:inset 0 0 0 1.5px var(--brand)}
  .cmd-field input{
    flex:1;background:none;border:0;outline:0;
    font-size:13px;font-weight:500;color:var(--text);
  }
  .cmd-field input::placeholder{color:var(--text-3)}
  .cmd-kbd{font-size:11px;font-weight:550;color:var(--text-3);border:1px solid var(--line);border-radius:4px;padding:2px 5px;font-variant-numeric:tabular-nums}
  .cmd-index{
    position:absolute;top:64px;left:0;right:0;
    background:var(--bg);
    border-bottom:1px solid var(--line);
    overflow:hidden;height:0;
    transition:height .3s var(--ease-out);
  }
  .cmd-inner{max-width:860px;margin:0 auto;padding:18px 24px 24px}
  .cmd-cols{columns:2;column-gap:48px}
  .cmd-grp{break-inside:avoid;margin-bottom:14px}
  .cmd-group-label{font-size:11px;font-weight:550;text-transform:none;letter-spacing:.6px;color:var(--text-3);margin:14px 0 6px}
  .cmd-group-label:first-child{margin-top:0}
  .cmd-hit{
    display:flex;align-items:baseline;gap:12px;
    padding:9px 12px;margin:0 -12px;border-radius:8px;
    font-size:15px;font-weight:550;letter-spacing:-.15px;
    transition:background .1s;
  }
  .cmd-hit .hit-desc{font-size:12px;font-weight:450;color:var(--text-2)}
  .cmd-hit .hit-num{margin-left:auto;font-size:11px;color:var(--text-3);font-variant-numeric:tabular-nums}
  .cmd-hit.sel{background:var(--hover)}
  .cmd-hit mark{background:none;color:var(--brand);font-weight:550}
  .cmd-empty{padding:18px 0;font-size:13px;color:var(--text-2)}
  .cmd-hint{display:flex;gap:14px;margin-top:16px;padding-top:12px;border-top:1px solid var(--line);font-size:11px;color:var(--text-3)}
  .cmd-hint b{font-weight:550;color:var(--text-2)}
  #cmd-scrim{position:fixed;inset:0;z-index:250;background:var(--scrim);opacity:0;pointer-events:none;transition:opacity .25s var(--ease-exit)}
  #cmd-scrim.on{opacity:1;pointer-events:auto}