:root {
  --text: #1f2a24;
  --muted: #5b6b62;
  --line: #dfe6e1;
  --bg: #ffffff;
  --soft: #f4f8f5;
  --accent: #1f7a4d;
  --accent-dark: #165c3a;
  --cta: #d9661f;
  --cta-dark: #b8541a;
  --note: #fff8e6;
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0; background: var(--bg); color: var(--text);
  font-family: system-ui, -apple-system, "Hiragino Sans", "Hiragino Kaku Gothic ProN", "Noto Sans JP", "Yu Gothic UI", Meiryo, sans-serif;
  font-size: 16px; line-height: 1.9; letter-spacing: .02em;
}
a { color: var(--accent); }
a:hover { color: var(--accent-dark); }
.wrap { max-width: 760px; margin: 0 auto; padding: 0 16px; }

.site-header { border-bottom: 1px solid var(--line); background: #fff; }
.site-header .wrap { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 4px 16px; padding-top: 12px; padding-bottom: 12px; }
.site-name { font-weight: 700; font-size: 18px; color: var(--text); text-decoration: none; }
.site-nav { display: flex; flex-wrap: wrap; gap: 4px 16px; font-size: 14px; }
.site-nav a { color: var(--muted); text-decoration: none; }
.site-nav a:hover { color: var(--accent); }

main.wrap { padding-top: 16px; padding-bottom: 48px; }
.breadcrumb { font-size: 13px; color: var(--muted); margin-bottom: 8px; }
.breadcrumb a { color: var(--muted); }

h1 { font-size: 26px; line-height: 1.5; margin: 8px 0 12px; }
h2 { font-size: 21px; line-height: 1.5; margin: 40px 0 12px; padding-bottom: 6px; border-bottom: 2px solid var(--accent); }
h3 { font-size: 18px; line-height: 1.5; margin: 28px 0 8px; }
p { margin: 0 0 16px; }
ul, ol { padding-left: 1.4em; margin: 0 0 16px; }
li { margin: 4px 0; }
hr { border: 0; border-top: 1px solid var(--line); margin: 32px 0; }
code { background: var(--soft); padding: 1px 4px; border-radius: 4px; font-size: .92em; }

.pr { font-size: 13px; color: var(--muted); background: var(--soft); border-radius: 6px; padding: 6px 10px; margin: 0 0 8px; }
.meta { font-size: 13px; color: var(--muted); margin-bottom: 24px; }
.draft { display: inline-block; font-size: 12px; color: #fff; background: #a33; border-radius: 4px; padding: 2px 8px; }
.lead { color: var(--muted); }
.empty { color: var(--muted); }

.note { background: var(--note); border-left: 4px solid #e8b632; padding: 12px 14px; border-radius: 4px; margin: 0 0 16px; }

.table-wrap { overflow-x: auto; margin: 0 0 20px; -webkit-overflow-scrolling: touch; }
table { border-collapse: collapse; width: 100%; font-size: 15px; line-height: 1.7; min-width: 480px; }
th, td { border: 1px solid var(--line); padding: 8px 10px; text-align: left; vertical-align: top; }
th { background: var(--soft); font-weight: 600; }

.toc { background: var(--soft); border-radius: 8px; padding: 12px 16px; margin: 0 0 24px; }
.toc__title { font-weight: 700; margin: 0 0 4px; }
.toc ol { margin: 0; }

.offer { border: 2px solid var(--cta); border-radius: 10px; padding: 16px; margin: 24px 0; text-align: center; background: #fffaf6; }
.offer__name { font-weight: 700; margin: 0 0 6px; }
.offer__note { font-size: 14px; color: var(--muted); margin: 0 0 12px; }
.offer__btn { display: inline-block; background: var(--cta); color: #fff; font-weight: 700; text-decoration: none; padding: 12px 24px; border-radius: 999px; }
.offer__btn:hover { background: var(--cta-dark); color: #fff; }
.offer__pr { font-size: 12px; color: var(--muted); margin: 8px 0 0; }
.offer__pixel { position: absolute; width: 1px; height: 1px; border: 0; }
.offer--pending { border-style: dashed; color: var(--muted); }

.hero { background: var(--soft); border-radius: 12px; padding: 28px 20px; margin: 8px 0 24px; text-align: center; }
.hero h1 { margin-top: 0; }
.hero__btn { display: inline-block; background: var(--accent); color: #fff; text-decoration: none; font-weight: 700; padding: 12px 24px; border-radius: 999px; }
.hero__btn:hover { background: var(--accent-dark); color: #fff; }

.cards { list-style: none; padding: 0; display: grid; gap: 12px; }
.card a { display: block; border: 1px solid var(--line); border-radius: 10px; padding: 14px 16px; text-decoration: none; color: var(--text); }
.card a:hover { border-color: var(--accent); }
.card__title { display: block; font-weight: 700; color: var(--accent); }
.card__desc { display: block; font-size: 14px; color: var(--muted); line-height: 1.7; }
.related { margin-top: 40px; }

.calc { border: 1px solid var(--line); border-radius: 12px; padding: 16px; margin: 0 0 24px; background: #fff; }
.calc label { display: block; font-weight: 600; margin: 12px 0 4px; }
.calc select, .calc input { width: 100%; font-size: 16px; padding: 8px 10px; border: 1px solid #b9c6be; border-radius: 6px; background: #fff; }
.calc .row { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.calc button { margin-top: 16px; width: 100%; font-size: 16px; font-weight: 700; color: #fff; background: var(--accent); border: 0; border-radius: 999px; padding: 12px; cursor: pointer; }
.calc__result { margin-top: 16px; }
.calc__total { font-size: 22px; font-weight: 700; }

.site-footer { border-top: 1px solid var(--line); background: var(--soft); font-size: 13px; color: var(--muted); padding: 24px 0; }
.site-footer nav { display: flex; flex-wrap: wrap; gap: 4px 16px; margin-bottom: 12px; }
.site-footer a { color: var(--muted); }

@media (max-width: 520px) {
  h1 { font-size: 22px; }
  h2 { font-size: 19px; }
  .calc .row { grid-template-columns: 1fr; }
}