:root {
  --bg: #fffdf8;
  --fg: #1c1917;
  --muted: #78716c;
  --border: #e7e5e4;
  --accent: #f97316;
  --card: #ffffff;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #171412;
    --fg: #f5f0eb;
    --muted: #a8a29e;
    --border: #3f3a36;
    --card: #211d1a;
  }
}
* { box-sizing: border-box; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font: 16px/1.7 "Segoe UI", "Hiragino Sans", "Noto Sans JP", sans-serif;
}
.wrap { max-width: 860px; margin: 0 auto; padding: 0 20px 60px; }
header.site {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 18px 0;
}
header.site a { color: var(--fg); text-decoration: none; font-weight: 800; font-size: 18px; }
header.site .mikan { font-size: 22px; }
.hero { padding: 40px 0 24px; }
.hero h1 { font-size: 34px; line-height: 1.3; margin: 0 0 12px; }
.hero p { color: var(--muted); font-size: 18px; margin: 0; }
.grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 16px; margin: 28px 0; }
.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 20px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.card img { width: 56px; height: 56px; border-radius: 12px; }
.card h2 { margin: 4px 0 0; font-size: 19px; }
.card p { margin: 0; color: var(--muted); font-size: 14px; flex: 1; }
.card .price { font-weight: 800; color: var(--accent); }
.btn {
  display: inline-block;
  background: var(--accent);
  color: #fff;
  text-decoration: none;
  font-weight: 700;
  border-radius: 10px;
  padding: 10px 18px;
  text-align: center;
  border: none;
  cursor: pointer;
  font-size: 15px;
}
.btn.ghost { background: transparent; color: var(--accent); border: 2px solid var(--accent); }
.btn[aria-disabled="true"] { opacity: 0.55; pointer-events: none; }
section { margin: 36px 0; }
h2.sec { font-size: 24px; margin: 0 0 12px; }
ul.features { padding-left: 20px; }
ul.features li { margin: 6px 0; }
.faq dt { font-weight: 700; margin-top: 14px; }
.faq dd { margin: 4px 0 0; color: var(--muted); }
footer.site {
  border-top: 1px solid var(--border);
  margin-top: 50px;
  padding: 20px 0;
  color: var(--muted);
  font-size: 13px;
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
}
footer.site a { color: var(--muted); }
.badge-soon {
  display: inline-block;
  background: var(--border);
  color: var(--muted);
  border-radius: 8px;
  padding: 2px 10px;
  font-size: 12px;
  font-weight: 700;
}
.jp { color: var(--muted); }
article.legal h1 { font-size: 26px; }
article.legal h2 { font-size: 19px; margin-top: 28px; }
article.legal p, article.legal li { color: var(--muted); font-size: 15px; }
textarea.demo {
  width: 100%;
  min-height: 140px;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: var(--card);
  color: var(--fg);
  padding: 12px;
  font: 13px/1.5 ui-monospace, Menlo, monospace;
}
.demo-out { overflow-x: auto; border: 1px solid var(--border); border-radius: 10px; margin-top: 14px; }
.demo-out table { border-collapse: collapse; font-size: 13px; width: 100%; }
.demo-out td, .demo-out th { border: 1px solid var(--border); padding: 4px 8px; text-align: left; }
.note { color: var(--muted); font-size: 13px; }