/* サイトファクトリー共通スタイル(依存なし・レスポンシブ) */
:root {
  --c-primary: #1a6b54;
  --c-primary-dark: #10473a;
  --c-bg: #fafaf8;
  --c-text: #24312d;
  --c-muted: #5f6f6a;
  --c-border: #d8e0dd;
  --c-accent-bg: #eaf4f0;
  --c-warn-bg: #fdf3e3;
}
* { box-sizing: border-box; }
body {
  margin: 0; background: var(--c-bg); color: var(--c-text);
  font-family: "Hiragino Kaku Gothic ProN", "Yu Gothic", Meiryo, sans-serif;
  line-height: 1.8; font-size: 16px;
}
.wrap { max-width: 880px; margin: 0 auto; padding: 0 16px; }
a { color: var(--c-primary); }

.site-header { background: var(--c-primary); }
.site-header .wrap { display: flex; flex-wrap: wrap; align-items: center; gap: 8px 20px; padding: 12px 16px; }
.brand { color: #fff; font-weight: 700; font-size: 1.15rem; text-decoration: none; }
.gnav { display: flex; flex-wrap: wrap; gap: 4px 14px; }
.gnav a { color: #d9ece6; text-decoration: none; font-size: .9rem; }
.gnav a:hover { color: #fff; }

.breadcrumb { font-size: .8rem; color: var(--c-muted); padding: 10px 16px; }
.breadcrumb a { color: var(--c-muted); }

main { padding-bottom: 40px; }
h1 { font-size: 1.5rem; line-height: 1.4; margin: .6em 0; }
h2 { font-size: 1.2rem; border-left: 4px solid var(--c-primary); padding-left: 10px; margin-top: 2em; }

.lead { color: var(--c-muted); }
.insight {
  background: var(--c-accent-bg); border-left: 4px solid var(--c-primary);
  padding: 12px 16px; border-radius: 0 6px 6px 0; margin: 16px 0;
}
.insight strong { color: var(--c-primary-dark); }

.stat-cards { display: grid; grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); gap: 10px; margin: 16px 0; }
.stat-card { background: #fff; border: 1px solid var(--c-border); border-radius: 8px; padding: 12px; text-align: center; }
.stat-card .label { font-size: .75rem; color: var(--c-muted); }
.stat-card .value { font-size: 1.35rem; font-weight: 700; color: var(--c-primary-dark); }
.stat-card .unit { font-size: .8rem; }

table.data { width: 100%; border-collapse: collapse; background: #fff; font-size: .92rem; margin: 12px 0; }
table.data th, table.data td { border: 1px solid var(--c-border); padding: 7px 10px; text-align: right; }
table.data th { background: var(--c-accent-bg); text-align: center; }
table.data td:first-child, table.data th:first-child { text-align: left; }
table.data tr.hl { background: var(--c-warn-bg); font-weight: 700; }
.table-scroll { overflow-x: auto; }

.calc {
  background: #fff; border: 2px solid var(--c-primary); border-radius: 10px;
  padding: 18px; margin: 18px 0;
}
.calc h2 { border: none; padding: 0; margin: 0 0 10px; }
.calc label { display: block; font-weight: 600; margin-top: 12px; font-size: .9rem; }
.calc select, .calc input {
  width: 100%; padding: 9px; margin-top: 4px; font-size: 1rem;
  border: 1px solid var(--c-border); border-radius: 6px;
}
.calc button {
  margin-top: 16px; width: 100%; padding: 12px; font-size: 1.05rem;
  background: var(--c-primary); color: #fff; border: 0; border-radius: 6px;
  cursor: pointer; font-weight: 700;
}
.calc button:hover { background: var(--c-primary-dark); }
.calc .result {
  display: none; margin-top: 14px; padding: 14px;
  background: var(--c-accent-bg); border-radius: 6px; text-align: center;
}
.calc .result.show { display: block; }
.calc .result .amount { font-size: 1.7rem; font-weight: 700; color: var(--c-primary-dark); }
.calc .note { font-size: .78rem; color: var(--c-muted); margin-top: 8px; }

.related { margin-top: 28px; }
.related ul { list-style: none; padding: 0; display: grid; grid-template-columns: repeat(auto-fill, minmax(220px, 1fr)); gap: 8px; }
.related li { background: #fff; border: 1px solid var(--c-border); border-radius: 6px; }
.related a { display: block; padding: 9px 12px; text-decoration: none; font-size: .9rem; }

.ad-slot { margin: 24px 0; min-height: 40px; text-align: center; }

.site-footer { background: var(--c-primary-dark); color: #cfe0da; font-size: .82rem; margin-top: 40px; }
.site-footer .wrap { padding: 24px 16px; }
.site-footer a { color: #fff; }
.prose { background: #fff; border: 1px solid var(--c-border); border-radius: 8px; padding: 20px 24px; }

@media (max-width: 600px) {
  h1 { font-size: 1.25rem; }
  body { font-size: 15px; }
}