:root{
  --bg:#f8f3fb; --surface:#ffffff; --surface-alt:#f1e9fa;
  --ink:#2b2140; --ink-soft:#6b5c86; --ink-faint:#a196b8;
  --accent:#c23b86; --accent2:#6b3fa0;
  --line:rgba(43,33,64,0.14); --line-strong:rgba(43,33,64,0.24);
  --glow-a:#8b5fbf; --glow-b:#ef6fa8;
  --card-shadow:0 14px 34px -18px rgba(107,63,160,0.35);
  --font-display:"Zen Old Mincho","Hiragino Mincho ProN",serif;
  --font-body:"Zen Maru Gothic","Hiragino Kaku Gothic ProN",sans-serif;
}
@media (prefers-color-scheme: dark){
  :root:not([data-theme="light"]){
    --bg:#170f22; --surface:#221733; --surface-alt:#1c1229;
    --ink:#f1e9fb; --ink-soft:#c2afda; --ink-faint:#8a7aa3;
    --accent:#f06fa8; --accent2:#9b6fdb;
    --line:rgba(241,233,251,0.14); --line-strong:rgba(241,233,251,0.26);
    --glow-a:#9b6fdb; --glow-b:#f06fa8;
    --card-shadow:0 14px 34px -18px rgba(0,0,0,0.55);
  }
}
:root[data-theme="dark"]{
  --bg:#170f22; --surface:#221733; --surface-alt:#1c1229;
  --ink:#f1e9fb; --ink-soft:#c2afda; --ink-faint:#8a7aa3;
  --accent:#f06fa8; --accent2:#9b6fdb;
  --line:rgba(241,233,251,0.14); --line-strong:rgba(241,233,251,0.26);
  --glow-a:#9b6fdb; --glow-b:#f06fa8;
  --card-shadow:0 14px 34px -18px rgba(0,0,0,0.55);
}
*{box-sizing:border-box;}
body{
  margin:0; background:var(--bg); color:var(--ink);
  font-family:var(--font-body); font-size:16.5px; line-height:1.9;
}
a{ color:var(--accent2); }
.wrap{ max-width:760px; margin:0 auto; padding:0 24px 80px; }
h1,h2{ font-family:var(--font-display); font-weight:700; margin:0; }

header{
  background:color-mix(in srgb, var(--bg) 82%, transparent);
  -webkit-backdrop-filter:blur(8px); backdrop-filter:blur(8px);
  border-bottom:1px solid var(--line); margin-bottom:44px;
}
.header-inner{
  display:flex; align-items:center; justify-content:space-between;
  padding:14px 24px; max-width:760px; margin:0 auto;
}
.brand{ display:flex; align-items:center; gap:11px; text-decoration:none; color:var(--ink); }
.seal{
  width:34px; height:34px; border-radius:10px; flex:none;
  background:linear-gradient(145deg, var(--glow-a), var(--glow-b));
  color:#fff; display:flex; align-items:center; justify-content:center;
  font-family:var(--font-display); font-size:16px; font-weight:700;
}
.brand-word{ font-family:var(--font-display); font-size:17px; font-weight:700; }
.back-link{ font-size:14px; color:var(--ink-soft); text-decoration:none; }
.back-link:hover{ color:var(--accent); }

.page-title{ font-size:clamp(24px,4vw,30px); margin-bottom:8px; }
.updated{ font-size:13px; color:var(--ink-faint); margin-bottom:36px; display:block; }

article section{ margin-bottom:34px; }
article h2{ font-size:19px; margin-bottom:12px; color:var(--accent2); }
article p{ font-size:15.5px; color:var(--ink-soft); margin-bottom:12px; }
article ul, article ol{ font-size:15.5px; color:var(--ink-soft); padding-left:22px; }
article li{ margin-bottom:8px; }
article strong{ color:var(--ink); }

table.info-table{ width:100%; border-collapse:collapse; background:var(--surface); border-radius:16px; overflow:hidden; box-shadow:var(--card-shadow); }
table.info-table th, table.info-table td{ text-align:left; padding:14px 18px; font-size:14.5px; border-bottom:1px solid var(--line); vertical-align:top; }
table.info-table th{ width:34%; color:var(--ink-soft); font-weight:500; background:var(--surface-alt); }
table.info-table tr:last-child th, table.info-table tr:last-child td{ border-bottom:none; }

.callout{
  background:var(--surface-alt); border-radius:14px; padding:18px 20px;
  font-size:14.5px; color:var(--ink-soft); margin-bottom:24px;
}