:root{
  --ground:#F2F4F7; --surface:#FFFFFF; --ink:#12172A; --muted:#5B6379; --faint:#858CA0;
  --line:#DCE1EA; --line-soft:#E9EDF3; --accent:#1B3A6B; --accent-soft:#E8EEF8;
  --serif:"Shippori Mincho","Hiragino Mincho ProN","Yu Mincho",Georgia,serif;
  --sans:"Zen Kaku Gothic New","Hiragino Sans","Yu Gothic",system-ui,sans-serif;
  --mono:"IBM Plex Mono",ui-monospace,"SFMono-Regular",Menlo,monospace;
}
@media (prefers-color-scheme:dark){
  :root:not([data-theme="light"]){
    --ground:#0E1118; --surface:#161B26; --ink:#E6EAF2; --muted:#9AA3B7; --faint:#7A8398;
    --line:#2A313F; --line-soft:#222835; --accent:#9FC0F0; --accent-soft:#1B2536;
  }
}
:root[data-theme="dark"]{
  --ground:#0E1118; --surface:#161B26; --ink:#E6EAF2; --muted:#9AA3B7; --faint:#7A8398;
  --line:#2A313F; --line-soft:#222835; --accent:#9FC0F0; --accent-soft:#1B2536;
}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;background:var(--ground);color:var(--ink);font-family:var(--sans);
  font-size:16px;line-height:1.85;padding-inline:20px;-webkit-font-smoothing:antialiased}
img{max-width:100%}
[hidden]{display:none!important}
.sheet{max-width:720px;margin-inline:auto;background:var(--surface);
  border-left:1px solid var(--line);border-right:1px solid var(--line);
  padding-inline:clamp(20px,5vw,64px);padding-block:clamp(36px,7vw,72px);
  display:flex;flex-direction:column;gap:40px;min-height:100vh}
header{display:flex;flex-direction:column;gap:18px}
.topline{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;
  gap:16px;padding-bottom:18px;border-bottom:1px solid var(--line-soft)}
.appname{font-family:var(--mono);font-size:11px;font-weight:500;letter-spacing:.14em;
  text-transform:uppercase;color:var(--faint)}
.langswitch{display:flex;gap:2px}
.langswitch button{font-family:var(--mono);font-size:11px;letter-spacing:.1em;padding:6px 13px;
  border:1px solid var(--line);background:transparent;color:var(--muted);cursor:pointer;
  transition:background .15s,color .15s}
.langswitch button:first-child{border-radius:3px 0 0 3px}
.langswitch button:last-child{border-radius:0 3px 3px 0;border-left:none}
.langswitch button:hover{color:var(--ink)}
.langswitch button[aria-pressed="true"]{background:var(--accent);border-color:var(--accent);color:var(--ground)}
.langswitch button:focus-visible{outline:2px solid var(--accent);outline-offset:2px}
h1{font-family:var(--serif);font-weight:600;font-size:clamp(26px,5vw,36px);line-height:1.4;
  letter-spacing:.01em;margin:0;text-wrap:balance}
.meta{font-family:var(--mono);font-size:12px;color:var(--faint);display:flex;flex-wrap:wrap;gap:6px 20px}
.lede{border-left:3px solid var(--accent);background:var(--accent-soft);padding:20px 24px;
  border-radius:0 4px 4px 0;font-size:15px;color:var(--ink)}
.lede strong{font-weight:700}
.clauses{display:flex;flex-direction:column;gap:34px}
section.clause{display:flex;flex-direction:column;gap:10px}
h2{font-family:var(--serif);font-weight:600;font-size:17px;line-height:1.6;margin:0;
  display:flex;gap:12px;align-items:baseline}
h2 .num{font-family:var(--mono);font-size:12px;font-weight:500;color:var(--accent);
  flex:none;font-variant-numeric:tabular-nums}
p{margin:0;font-size:15px;color:var(--muted)}
section.clause p+p{margin-top:10px}
ul{margin:4px 0 0;padding-left:0;list-style:none;display:flex;flex-direction:column;gap:7px}
li{font-size:15px;color:var(--muted);padding-left:20px;position:relative}
li::before{content:"";position:absolute;left:4px;top:.72em;width:5px;height:1px;background:var(--faint)}
a{color:var(--accent);text-underline-offset:3px}
.contact{border:1px solid var(--line);border-radius:5px;padding:22px 24px;
  display:flex;flex-direction:column;gap:8px}
.contact .addr{font-family:var(--mono);font-size:15px;word-break:break-all}
footer{border-top:1px solid var(--line-soft);padding-top:22px;font-size:13px;color:var(--faint);
  display:flex;flex-direction:column;gap:6px}
footer a{color:var(--faint)}
@media (prefers-reduced-motion:reduce){*{transition:none!important}}