:root {
  --bg: #f7f5f0; --fg: #1f1d1a; --muted: #6b665e; --accent: #2b5fd9; --on-accent: #fff; --line: #e2ded6; --panel: #fffdf9;
  color-scheme: light dark;
}
@media (prefers-color-scheme: dark) {
  :root { --bg: #16171b; --fg: #ecebe6; --muted: #9a978f; --accent: #8fb0ff; --on-accent: #0f1320; --line: #2b2d33; --panel: #1d1e24; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
}
* { box-sizing: border-box; }
[hidden] { display: none !important; }
html { scroll-behavior: smooth; }
body {
  margin: 0; background: var(--bg); color: var(--fg);
  font-family: "Hiragino Mincho ProN", "Hiragino Mincho Pro", "Yu Mincho", "YuMincho", "Noto Serif JP", "Noto Serif CJK JP", serif;
  line-height: 1.9; -webkit-font-smoothing: antialiased;
}
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }
.wrap { max-width: 42rem; margin: 0 auto; padding: 0 max(1rem, env(safe-area-inset-right)) 0 max(1rem, env(safe-area-inset-left)); }
.nav { display: flex; flex-wrap: wrap; align-items: center; gap: .4rem 1.2rem; padding: 1rem 0; font-size: .9rem; }
.nav .brand { display: flex; align-items: center; gap: .5rem; font-weight: 600; color: var(--fg); margin-right: auto; font-size: 1rem; }
.nav .brand img { width: 28px; height: 28px; border-radius: 7px; }
.nav a { color: var(--muted); }
.nav a:hover { color: var(--fg); text-decoration: none; }
main { padding: 1.5rem 0 3rem; }
h1 { margin: 0; font-size: 1.9rem; letter-spacing: .02em; font-weight: 600; }
h2 { font-size: 1.25rem; margin: 3rem 0 .8rem; font-weight: 600; letter-spacing: .02em; }
h3 { font-size: 1.02rem; margin: 1.6rem 0 .4rem; font-weight: 600; }
p { margin: 0 0 1.1rem; }
ul, ol { padding-left: 1.4rem; margin: 0 0 1.2rem; }
li { margin: .25rem 0; }
.muted { color: var(--muted); }
.small { font-size: .88rem; }
.hero { display: flex; align-items: center; gap: 1.1rem; margin: 1.5rem 0 1rem; }
.hero img { width: 72px; height: 72px; border-radius: 16px; box-shadow: 0 6px 20px rgb(0 0 0 / .18); }
.hero p { margin: .15rem 0 0; color: var(--muted); font-size: .95rem; }
.lead { font-size: 1.05rem; }
.actions { display: flex; flex-wrap: wrap; gap: .7rem; margin: 1.2rem 0 .6rem; }
.btn {
  display: inline-flex; align-items: center; gap: .4rem; padding: .55rem 1.1rem; border-radius: 999px;
  border: 1px solid var(--line); background: var(--panel); color: var(--fg); font-size: .95rem; line-height: 1.4;
}
.btn:hover { text-decoration: none; border-color: var(--muted); }
.btn.primary { background: var(--accent); border-color: transparent; color: var(--on-accent); }
.btn.primary:hover { filter: brightness(1.08); }
.btn small { font-size: .78rem; opacity: .9; }
.status { display: inline-block; padding: .2rem .8rem; border: 1px solid var(--line); border-radius: 999px; color: var(--muted); font-size: .85rem; letter-spacing: .06em; }
.sample {
  writing-mode: vertical-rl; height: 20rem; margin: 1.4rem 0 1.8rem; padding: 0 1.2rem; border-left: 1px solid var(--line); border-right: 1px solid var(--line);
  font-size: 1.05rem; letter-spacing: .12em; line-height: 2.1;
}
.sample ruby rt { font-size: .5em; letter-spacing: 0; }
.grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(14rem, 1fr)); gap: .8rem 1.4rem; margin: 0 0 1rem; }
.grid div { padding: .8rem 1rem; border: 1px solid var(--line); border-radius: 12px; background: var(--panel); }
.grid b { display: block; margin-bottom: .2rem; }
dl.facts { display: grid; grid-template-columns: max-content 1fr; gap: .3rem 1.2rem; margin: 0 0 1.2rem; }
dl.facts dt { color: var(--muted); }
dl.facts dd { margin: 0; }
.price { font-size: 1.6rem; font-weight: 600; letter-spacing: .02em; }
.price small { font-size: .85rem; font-weight: 400; color: var(--muted); margin-left: .4rem; }
.steps { counter-reset: s; list-style: none; padding: 0; }
.steps li { position: relative; padding-left: 2.2rem; margin: .6rem 0; }
.steps li::before { counter-increment: s; content: counter(s); position: absolute; left: 0; top: .15rem; width: 1.5rem; height: 1.5rem; border-radius: 50%; background: var(--accent); color: var(--on-accent); font-size: .8rem; display: flex; align-items: center; justify-content: center; }
article.legal h1 { font-size: 1.5rem; margin-bottom: 1.2rem; }
article.legal h2 { font-size: 1.05rem; margin: 1.8rem 0 .4rem; }
article.legal ol ol { margin: .3rem 0 .4rem; }
article.legal .note { color: var(--muted); margin-top: 2rem; }
footer { margin-top: 3rem; padding: 1.4rem 0 2rem; border-top: 1px solid var(--line); color: var(--muted); font-size: .85rem; }
footer nav { display: flex; flex-wrap: wrap; gap: .4rem 1.2rem; margin-bottom: .6rem; }
footer a { color: var(--muted); }
.en { color: var(--muted); font-size: .9rem; font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif; }
code { font-family: ui-monospace, Menlo, Consolas, monospace; font-size: .92em; background: color-mix(in srgb, var(--fg) 7%, transparent); padding: .05em .35em; border-radius: 4px; }