/* 利用規約・プライバシーポリシー共通。LP（index.html）の色とタイポグラフィに合わせる。 */
:root{
  --paper:#FFFFFF;
  --paper-2:#F2F6FA;
  --paper-3:#FFFFFF;
  --ink:#0E1A2B;
  --ink-2:#4C5A6E;
  --ink-3:#8493A6;
  --line:#DCE4EE;
  --line-soft:#EBF0F6;
  --deep:#102A4C;
  --deep-ink:#EAF2FF;
  --accent:#E8590C;
  --accent-soft:#FFF2E8;
  --r:14px;
  --maxw:760px;
  --step--1:clamp(.82rem,.8rem + .1vw,.88rem);
  --step-0:clamp(.95rem,.92rem + .18vw,1.02rem);
  --step-1:clamp(1.08rem,1.02rem + .3vw,1.24rem);
  --step-2:clamp(1.34rem,1.16rem + .7vw,1.7rem);
  --step-3:clamp(1.6rem,1.3rem + 1.3vw,2.3rem);
}
@media (prefers-color-scheme:dark){
  :root:not([data-theme="light"]){
    --paper:#0C1219;
    --paper-2:#111924;
    --paper-3:#141D29;
    --ink:#E9EFF7;
    --ink-2:#A6B3C4;
    --ink-3:#71808F;
    --line:#243144;
    --line-soft:#1A2431;
    --deep:#E9EFF7;
    --deep-ink:#0C1219;
    --accent:#FF8A4C;
    --accent-soft:#2E1B0D;
  }
}
:root[data-theme="dark"]{
  --paper:#0C1219;
  --paper-2:#111924;
  --paper-3:#141D29;
  --ink:#E9EFF7;
  --ink-2:#A6B3C4;
  --ink-3:#71808F;
  --line:#243144;
  --line-soft:#1A2431;
  --deep:#E9EFF7;
  --deep-ink:#0C1219;
  --accent:#FF8A4C;
  --accent-soft:#2E1B0D;
}
*{box-sizing:border-box}
body{
  margin:0;
  background:var(--paper);
  color:var(--ink);
  font-family:"Zen Kaku Gothic New","Hiragino Sans","Noto Sans JP",system-ui,sans-serif;
  font-size:var(--step-0);
  line-height:1.95;
  font-feature-settings:"palt" 1;
  -webkit-font-smoothing:antialiased;
  word-break:auto-phrase;
  text-wrap:pretty;
}
a{color:var(--accent)}
:focus-visible{outline:2px solid var(--accent);outline-offset:3px}
.wrap{width:min(100% - 2.5rem,var(--maxw));margin-inline:auto}
.site-head{border-bottom:1px solid var(--line);background:var(--paper);position:sticky;top:0;z-index:20}
.site-head .wrap{display:flex;align-items:center;justify-content:space-between;gap:1rem;height:64px}
.brand{display:flex;align-items:baseline;gap:.6rem;text-decoration:none;color:inherit}
.brand b{font-weight:900;font-size:1.15rem;letter-spacing:-.01em}
.brand span{font-size:.72rem;font-weight:500;color:var(--ink-3)}
.site-head a.back{font-size:var(--step--1);text-decoration:none;color:var(--ink-2);font-weight:500}
.site-head a.back:hover{color:var(--accent)}
main{padding-block:clamp(2.6rem,6vw,4.5rem) clamp(3rem,7vw,5rem)}
h1{font-size:var(--step-3);font-weight:900;line-height:1.4;letter-spacing:-.02em;margin:0 0 1rem}
.meta{color:var(--ink-3);font-size:var(--step--1);margin:0 0 2.4rem}
.meta b{color:var(--ink-2);font-weight:700}
.intro{
  border:1px solid var(--line);background:var(--paper-2);border-radius:var(--r);
  padding:1.4rem 1.5rem;margin-bottom:2.6rem;color:var(--ink-2);font-size:var(--step--1);
}
.intro p{margin:0}
.intro p + p{margin-top:.8rem}
.intro b{color:var(--ink);font-weight:700}
.toc{margin-bottom:3rem;border:1px solid var(--line);border-radius:var(--r);padding:1.4rem 1.6rem}
.toc h2{font-size:var(--step-0);font-weight:900;margin:0 0 .9rem}
.toc ol{margin:0;padding-left:1.4em;columns:2;column-gap:2rem;font-size:var(--step--1)}
@media (max-width:640px){.toc ol{columns:1}}
.toc li{margin-bottom:.25rem;break-inside:avoid}
.toc a{text-decoration:none;color:var(--ink-2)}
.toc a:hover{color:var(--accent)}
h2.art{
  font-size:var(--step-1);font-weight:900;line-height:1.6;letter-spacing:-.01em;
  margin:3rem 0 1rem;padding-top:1.6rem;border-top:1px solid var(--line-soft);scroll-margin-top:80px;
}
h2.art:first-of-type{border-top:0;padding-top:0;margin-top:0}
h3{font-size:var(--step-0);font-weight:900;margin:2rem 0 .7rem}
p{margin:0 0 1rem}
ol.terms{counter-reset:item;list-style:none;margin:0;padding:0}
ol.terms > li{counter-increment:item;position:relative;padding-left:2.1rem;margin-bottom:1rem}
ol.terms > li::before{
  content:counter(item)".";position:absolute;left:0;top:0;
  font-family:"IBM Plex Mono",ui-monospace,monospace;font-size:var(--step--1);
  color:var(--accent);font-weight:600;
}
ol.terms ul{margin:.6rem 0 0;padding-left:1.3em}
ol.terms ul li{margin-bottom:.35rem}
table{border-collapse:collapse;width:100%;margin:1.2rem 0;font-size:var(--step--1)}
.table-scroll{overflow-x:auto;border:1px solid var(--line);border-radius:var(--r)}
.table-scroll table{margin:0;min-width:420px}
th,td{padding:.85rem 1.1rem;text-align:left;vertical-align:top;border-bottom:1px solid var(--line-soft)}
thead th{background:var(--deep);color:var(--deep-ink);font-weight:700;white-space:nowrap}
tbody tr:last-child td{border-bottom:0}
.callout{
  border:1px solid color-mix(in srgb,var(--accent) 40%,transparent);
  background:var(--accent-soft);border-radius:var(--r);padding:1.3rem 1.5rem;margin:1.4rem 0;
}
.callout p:last-child{margin-bottom:0}
.callout b{font-weight:700}
.company{
  margin-top:3.5rem;border:1px solid var(--line);border-radius:var(--r);
  background:var(--paper-2);padding:1.6rem 1.8rem;
}
.company h2{font-size:var(--step-0);font-weight:900;margin:0 0 1rem}
.company dl{display:grid;grid-template-columns:8rem 1fr;gap:.5rem 1rem;margin:0;font-size:var(--step--1)}
@media (max-width:560px){.company dl{grid-template-columns:1fr;gap:.1rem .5rem}}
.company dt{color:var(--ink-3)}
.company dd{margin:0}
footer{border-top:1px solid var(--line);padding-block:2.2rem;color:var(--ink-3);font-size:var(--step--1)}
footer .wrap{display:flex;flex-wrap:wrap;gap:.6rem 1.4rem;align-items:center;justify-content:space-between}
footer a{color:var(--ink-2);text-decoration:none}
footer a:hover{color:var(--accent)}
footer nav{display:flex;gap:1.2rem;flex-wrap:wrap}