:root{color-scheme:light dark;--paper:#f4f5f7;--card:#fff;--ink:#1c1e23;--muted:#5d6470;--line:#e2e4e9;--accent:#1f8a5b;--soft:#e6f5ed;--pending:#9b6419;--pending-soft:#fff1d8}
@media(prefers-color-scheme:dark){:root{--paper:#131417;--card:#1c1e23;--ink:#edeef1;--muted:#a5abb4;--line:#30343a;--accent:#46d598;--soft:#18392b;--pending:#f0b23f;--pending-soft:#3b2d19}}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}}
body{margin:0;background:var(--paper);color:var(--ink);font:16px/1.65 -apple-system,BlinkMacSystemFont,"Hiragino Sans","Segoe UI",system-ui,sans-serif}
a{color:var(--accent);text-decoration:none}
a:hover{text-decoration:underline}
:focus-visible{outline:2px solid var(--accent);outline-offset:3px;border-radius:4px}
.top{border-bottom:1px solid var(--line);background:var(--card)}
.top-inner{max-width:980px;margin:auto;padding:13px 20px;display:flex;align-items:center;gap:20px;flex-wrap:wrap}
.brand{font-weight:750;color:var(--ink);white-space:nowrap}
.top nav{display:flex;gap:15px;flex:1 1 auto;flex-wrap:wrap;font-size:.9rem}
.top nav a[aria-current="page"]{font-weight:700;text-decoration:underline;text-underline-offset:5px}
.toggle{display:flex;border:1px solid var(--line);border-radius:99px;overflow:hidden;margin-left:auto}
.toggle[hidden]{display:none}
.langbtn{border:0;background:transparent;color:var(--muted);padding:5px 12px;font:600 .8rem/1.4 ui-monospace,SFMono-Regular,Menlo,monospace;cursor:pointer}
.langbtn[aria-pressed="true"]{background:var(--ink);color:var(--paper)}
html[data-lang="en"] .lang-ja,html[data-lang="ja"] .lang-en{display:none}
.wrap{max-width:980px;margin:auto;padding:42px 20px 80px}
.eyebrow,.meta,.version,.badge,.section-label{font-family:ui-monospace,SFMono-Regular,Menlo,monospace}
.eyebrow{color:var(--accent);font-size:.78rem;letter-spacing:.1em;text-transform:uppercase;margin:0 0 10px}
h1{font-size:clamp(2.2rem,6vw,3.6rem);letter-spacing:-.035em;line-height:1.12;margin:0 0 16px}
h2{font-size:1.5rem;line-height:1.25;margin:0 0 18px}
p{margin:.45rem 0 1rem}
.lede{font-size:1.12rem;color:var(--muted);max-width:650px}
.meta{color:var(--muted);font-size:.78rem}
.hero{margin-bottom:48px}
.section{margin-top:44px}
.section-label{font-size:.76rem;color:var(--muted);letter-spacing:.08em;text-transform:uppercase;margin-bottom:8px}
.grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:18px}
.card{background:var(--card);border:1px solid var(--line);border-radius:18px;padding:26px;min-width:0}
.card.pending{border-color:var(--pending)}
.card h2,.card h3{margin:8px 0 12px}
.card h3{font-size:1.2rem}
.version{font-size:.82rem;font-weight:700;color:var(--accent)}
.badge{display:inline-block;margin-left:10px;padding:2px 8px;border-radius:99px;font-size:.68rem;background:var(--soft);color:var(--accent);vertical-align:2px}
.badge.pending{color:var(--pending);background:var(--pending-soft)}
.notes{white-space:pre-line;overflow-wrap:anywhere}
.callout{background:var(--soft);border-left:3px solid var(--accent);border-radius:0 12px 12px 0;padding:16px 20px;margin:24px 0}
.actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:25px}
.button{display:inline-block;border:1px solid var(--accent);border-radius:10px;padding:9px 16px;font-weight:650}
.button.primary{background:var(--accent);color:var(--paper)}
.history-nav{display:flex;gap:12px;margin:26px 0 34px;flex-wrap:wrap}
.history-nav a{border:1px solid var(--line);border-radius:99px;padding:7px 14px;background:var(--card)}
.history-list{display:grid;gap:12px}
.release{background:var(--card);border:1px solid var(--line);border-radius:14px;overflow:hidden}
.release summary{display:flex;align-items:center;gap:12px;cursor:pointer;padding:15px 20px;list-style:none;font-weight:650}
.release summary::-webkit-details-marker{display:none}
.release summary::after{content:"+";margin-left:auto;color:var(--accent);font-size:1.25rem;line-height:1}
.release[open] summary::after{content:"−"}
.release .notes{border-top:1px solid var(--line);padding:15px 20px 20px;margin:0}
.release .version{min-width:4.4em}
footer{max-width:980px;margin:auto;padding:24px 20px 42px;border-top:1px solid var(--line);color:var(--muted);font-size:.88rem}
footer a{margin-right:12px}
@media(max-width:700px){.grid{grid-template-columns:1fr}.top-inner{gap:10px}.top nav{order:3;flex-basis:100%}.wrap{padding-top:32px}.card{padding:20px}}