:root{
    --navy:#1f2a7a;
    --navy-deep:#141a4d;
    --coral:#ee4a52;
    --ink:#14162b;
    --muted:#65698a;
    --paper:#fbfbfd;
    --rule:#dcdee9;
    --rule-soft:#eceef5;
    --sans:"IBM Plex Sans JP", "Hiragino Kaku Gothic ProN", "Noto Sans JP", system-ui, sans-serif;
    --mono:"IBM Plex Mono", ui-monospace, "SFMono-Regular", Menlo, monospace;
  }

  *{box-sizing:border-box}
  html{-webkit-text-size-adjust:100%}
  body{
    margin:0;
    background:var(--paper);
    color:var(--ink);
    font-family:var(--sans);
    font-size:16px;
    line-height:1.6;
    font-feature-settings:"palt" 1;
  }
  a{color:var(--navy)}
  :focus-visible{outline:2px solid var(--coral);outline-offset:3px;border-radius:2px}

  .wrap{max-width:1080px;margin:0 auto;padding:0 28px}

  /* ---------- masthead ---------- */
  .masthead{border-bottom:1px solid var(--rule);background:#fff}
  .masthead .wrap{display:flex;align-items:center;gap:20px;height:84px}
  .mark{display:flex;align-items:center;text-decoration:none}
  .mark img{height:36px;width:auto;display:block}
  .masthead .sep{
    width:1px;height:24px;background:var(--rule);
  }
  .masthead .section{font-size:15px;color:var(--muted)}
  .masthead nav{margin-left:auto;display:flex;align-items:center;gap:22px;font-size:14px}
  .masthead nav a{color:var(--muted);text-decoration:none}
  .masthead nav a:hover{color:var(--navy)}
  .masthead nav a.nav-subscribe{
    color:#fff;background:var(--navy);font-size:13px;line-height:1;
    padding:8px 14px;border-radius:999px;text-decoration:none;white-space:nowrap;
  }
  .masthead nav a.nav-subscribe:hover{color:#fff;background:#313b85}

  /* ---------- hero: the latest release is the hero ---------- */
  .latest{padding:64px 0 52px;border-bottom:1px solid var(--rule)}
  .latest-meta{display:flex;align-items:center;gap:14px;margin-bottom:10px}
  .pill{
    font-family:var(--mono);font-size:11.5px;font-weight:500;
    color:#fff;background:var(--coral);padding:3px 9px;border-radius:3px;
    letter-spacing:.02em;
  }
  .stamp{font-family:var(--mono);font-size:13.5px;color:var(--muted)}
  .version-xl{
    font-family:var(--mono);font-weight:600;
    font-size:clamp(3.6rem,11vw,7.4rem);
    line-height:.88;letter-spacing:-.045em;
    color:var(--navy);margin:0 0 18px;
  }
  .latest h1{
    font-size:clamp(1.35rem,2.6vw,1.75rem);font-weight:600;
    letter-spacing:-.015em;line-height:1.35;margin:0 0 14px;max-width:900px;
  }
  .lede{font-size:16.5px;color:var(--muted);max-width:900px;margin:0}

  /* ---------- filter bar ---------- */
  .filters{
    position:sticky;top:0;z-index:10;
    background:rgba(251,251,253,.94);backdrop-filter:blur(8px);
    border-bottom:1px solid var(--rule);
  }
  .filters .wrap{display:flex;align-items:center;gap:10px;flex-wrap:wrap;padding-top:12px;padding-bottom:12px}
  .filters-label{font-size:13.5px;color:var(--muted);margin-right:4px}
  .chip{
    font:inherit;font-size:13.5px;
    background:none;border:1px solid var(--rule);color:var(--muted);
    padding:5px 13px;border-radius:100px;cursor:pointer;
  }
  .chip:hover{border-color:var(--navy);color:var(--navy)}
  .chip[aria-pressed="true"]{background:var(--navy);border-color:var(--navy);color:#fff}
  .chip[aria-expanded="true"]{border-color:var(--navy);color:var(--navy)}
  .count{margin-left:auto;font-family:var(--mono);font-size:12.5px;color:var(--muted)}
  .filter-control{position:relative}
  .filter-menu{
    position:absolute;z-index:30;top:calc(100% + 6px);left:0;
    min-width:220px;max-width:min(320px,calc(100vw - 40px));
    max-height:320px;overflow:auto;
    padding:6px;background:#fff;
    border:1px solid var(--rule);border-radius:12px;
    box-shadow:0 16px 40px rgba(31,42,122,.12);
  }
  .menu-item{
    display:block;width:100%;text-align:left;font:inherit;font-size:13.5px;
    color:var(--ink);background:none;border:0;border-radius:8px;
    padding:7px 10px;cursor:pointer;
  }
  .tag-search{
    display:block;width:100%;font:inherit;font-size:13.5px;
    color:var(--ink);background:#fff;
    border:1px solid var(--rule);border-radius:8px;
    padding:7px 10px;margin:2px 2px 6px;
  }
  .tag-option{
    display:flex;align-items:center;gap:8px;
    font-size:13.5px;color:var(--ink);
    border-radius:8px;padding:7px 10px;cursor:pointer;
  }
  .tag-option input{margin:0;accent-color:var(--navy)}
  .menu-item:hover,.tag-option:hover{background:var(--rule-soft);color:var(--navy)}
  .menu-item[aria-selected="true"]{background:var(--rule-soft);color:var(--navy);font-weight:600}
  .tag-option.is-hidden{display:none}
  .selected-tags{display:flex;flex-wrap:wrap;gap:6px;align-items:center}
  .selected-tags:empty{display:none}
  .chip.tag-chip{display:inline-flex;align-items:center;gap:6px;padding:3px 9px 3px 12px;font-size:12.5px}
  .tag-x{font-size:15px;line-height:1}

  /* ---------- release ledger ---------- */
  .ledger{padding:8px 0 96px}
  .release{
    display:grid;grid-template-columns:170px 1fr;gap:44px;
    padding:44px 0;border-bottom:1px solid var(--rule-soft);
    scroll-margin-top:96px;
  }
  .release.is-hidden{display:none}
  .rail{position:sticky;top:98px;align-self:start}
  .rail .v{
    font-family:var(--mono);font-size:22px;font-weight:600;
    color:var(--navy);letter-spacing:-.02em;display:block;
  }
  .rail .d{font-family:var(--mono);font-size:13px;color:var(--muted);display:block;margin-top:4px}
  .rail .rail-tags{display:flex;flex-wrap:wrap;gap:8px;margin-top:12px}
  .rail .tag{
    display:inline-block;margin-top:0;font-size:12px;color:var(--muted);
    border:1px solid var(--rule);border-radius:3px;padding:2px 7px;
  }
  .release h2{font-size:20px;font-weight:600;letter-spacing:-.015em;margin:0 0 22px}

  ul.changes{list-style:none;margin:0;padding:0}
  ul.changes li{
    display:grid;grid-template-columns:96px 1fr;gap:20px;
    padding:13px 0;border-top:1px solid var(--rule-soft);
  }
  ul.changes li:first-child{border-top:none;padding-top:0}
  ul.changes li.is-hidden{display:none}
  .kind{
    font-family:var(--mono);font-size:12px;font-weight:500;
    padding-top:4px;letter-spacing:.01em;
  }
  .kind-added{color:var(--navy)}
  .kind-changed{color:#7a6300}
  .kind-improved{color:#7a6300}
  .kind-fixed{color:var(--muted)}
  .kind-removed{color:var(--muted)}
  .kind-breaking{color:var(--coral)}
  .body{max-width:66ch;font-size:15.5px}
  .body p{margin:0}
  .body .area{
    font-size:12.5px;color:var(--muted);margin-top:5px;display:block;
  }
  li.breaking{
    border-left:3px solid var(--coral);border-right:0;box-shadow:none;
    padding-left:17px;padding-right:20px;
    margin-left:-20px;grid-template-columns:79px 1fr;
  }
  code{
    font-family:var(--mono);font-size:.88em;
    background:#eef0f8;padding:1px 5px;border-radius:3px;color:var(--navy-deep);
  }

  .empty{
    display:none;padding:64px 0;text-align:center;color:var(--muted);font-size:15.5px;
  }
  .empty.is-shown{display:block}
  .empty button{
    font:inherit;font-size:15px;background:none;border:none;color:var(--navy);
    text-decoration:underline;cursor:pointer;padding:0;
  }

  footer{border-top:1px solid var(--rule);background:#fff;padding:30px 0}
  footer .wrap{display:flex;gap:18px;flex-wrap:wrap;align-items:center;font-size:13.5px;color:var(--muted)}
  footer a{color:var(--muted);text-decoration:none}
  footer a:hover{color:var(--navy)}
  footer .right{margin-left:auto;font-family:var(--mono);font-size:12.5px}

  @media (max-width:720px){
    .wrap{padding:0 20px}
    .masthead .sep,.masthead .section{display:none}
    .masthead nav{gap:10px}
    #nav-status,#nav-console{display:none}
    .masthead .wrap{height:70px}
    .mark img{height:30px}
    .latest{padding:44px 0 36px}
    .release{grid-template-columns:1fr;gap:18px;padding:34px 0}
    .rail{position:static;display:flex;align-items:baseline;gap:12px;flex-wrap:wrap}
    .rail .d{margin-top:0}
    .rail .rail-tags{margin-top:0}
    .rail .tag{margin-top:0}
    ul.changes li{grid-template-columns:1fr;gap:4px}
    li.breaking{grid-template-columns:1fr;margin-left:0;padding-left:14px;padding-right:20px;border-right:0;box-shadow:none}
    .kind{padding-top:0}
    .count{width:100%;margin-left:0}
  }
  @media (prefers-reduced-motion:reduce){
    *{animation:none!important;transition:none!important}
  }