:root{--ground:#E6EAE6;--panel:#F7F9F6;--ink:#17201C;--muted:#56625C;--line:#C9D1CB;--accent:#C8430F;--warn-bg:#FBE3E0;--warn-edge:#C62B1E}
@media (prefers-color-scheme: dark){:root{--ground:#101412;--panel:#1A201D;--ink:#E6ECE8;--muted:#9AA69F;--line:#2E3732;--accent:#FF7B42;--warn-bg:#3A1714;--warn-edge:#E5544A}}
*{box-sizing:border-box}
body{margin:0;background:var(--ground);color:var(--ink);font-family:"BIZ UDPGothic","Hiragino Sans","Yu Gothic UI","Meiryo",system-ui,sans-serif;font-size:16px;line-height:1.75}
main{max-width:720px;margin:0 auto;padding:max(16px,env(safe-area-inset-top)) 16px 48px}
h1{font-size:22px;margin:8px 0 2px}
h2{font-size:17px;margin:28px 0 6px;padding-top:10px;border-top:1px solid var(--line)}
.key h2{border:0;margin-top:0;padding-top:0}
.date{color:var(--muted);font-size:13px;margin:0 0 16px}
.key{background:var(--warn-bg);border-left:5px solid var(--warn-edge);border-radius:8px;padding:14px 16px}
ol,ul{padding-left:1.4em;margin:6px 0}
li{margin:4px 0}
p{margin:6px 0}
a{color:var(--accent)}
.back{margin:0;font-size:14px}
.links{margin-top:32px;font-size:14px}