/* くらしの計算室 - サイト共通スタイル */
:root {
  --c-primary: #0f766e;
  --c-primary-dark: #115e59;
  --c-primary-pale: #f0fdfa;
  --c-accent: #d97706;
  --c-text: #1f2937;
  --c-text-sub: #6b7280;
  --c-bg: #ffffff;
  --c-bg-soft: #f8fafc;
  --c-border: #e5e7eb;
  --c-result-bg: #fffbeb;
  --c-result-border: #fcd34d;
  --radius: 10px;
  --maxw: 760px;
}
@media (prefers-color-scheme: dark) {
  :root {
    --c-primary: #2dd4bf;
    --c-primary-dark: #5eead4;
    --c-primary-pale: #134e4a;
    --c-accent: #fbbf24;
    --c-text: #e5e7eb;
    --c-text-sub: #9ca3af;
    --c-bg: #111827;
    --c-bg-soft: #1f2937;
    --c-border: #374151;
    --c-result-bg: #292524;
    --c-result-border: #a16207;
  }
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Hiragino Kaku Gothic ProN", "Hiragino Sans", "Yu Gothic UI", "Meiryo", sans-serif;
  color: var(--c-text);
  background: var(--c-bg);
  line-height: 1.8;
  font-size: 16px;
}
.container { max-width: var(--maxw); margin: 0 auto; padding: 0 16px; }
a { color: var(--c-primary); }
a:hover { color: var(--c-primary-dark); }

/* ヘッダー */
.site-header { background: var(--c-primary); padding: 10px 0; }
.header-inner { display: flex; flex-wrap: wrap; align-items: center; gap: 8px 20px; }
.site-logo { color: #fff; font-size: 1.25rem; font-weight: 700; text-decoration: none; letter-spacing: .02em; }
.site-logo:hover { color: #ccfbf1; }
.site-nav { display: flex; flex-wrap: wrap; gap: 2px 14px; }
.site-nav a { color: #ccfbf1; font-size: .82rem; text-decoration: none; }
.site-nav a:hover { color: #fff; text-decoration: underline; }

main { padding: 20px 16px 48px; }

/* パンくず */
.breadcrumb { font-size: .78rem; color: var(--c-text-sub); margin: 0 0 12px; }
.breadcrumb ol { list-style: none; margin: 0; padding: 0; display: flex; flex-wrap: wrap; }
.breadcrumb li + li::before { content: "›"; margin: 0 6px; color: var(--c-text-sub); }
.breadcrumb a { color: var(--c-text-sub); }

/* 見出し */
h1 { font-size: 1.45rem; line-height: 1.4; margin: 0 0 10px; }
h2 { font-size: 1.15rem; border-left: 4px solid var(--c-primary); padding-left: 10px; margin: 36px 0 14px; }
h3 { font-size: 1rem; margin: 24px 0 8px; }
.intro { color: var(--c-text-sub); font-size: .95rem; margin: 0 0 18px; }

/* ツールボックス */
.tool-box {
  background: var(--c-primary-pale);
  border: 1.5px solid var(--c-primary);
  border-radius: var(--radius);
  padding: 20px 16px;
  margin: 0 0 18px;
}
.field { margin-bottom: 14px; }
.field label { display: block; font-weight: 600; font-size: .9rem; margin-bottom: 5px; }
.field input[type="date"], .field input[type="number"], .field input[type="text"],
.field select, .field textarea {
  width: 100%;
  padding: 10px 12px;
  font-size: 16px;
  border: 1px solid var(--c-border);
  border-radius: 6px;
  background: var(--c-bg);
  color: var(--c-text);
}
.field textarea { min-height: 140px; resize: vertical; }
.field .unit { margin-left: 6px; font-size: .85rem; color: var(--c-text-sub); }
.field-note { font-size: .78rem; color: var(--c-text-sub); margin-top: 3px; }
.radio-group { display: flex; flex-wrap: wrap; gap: 6px 16px; }
.radio-group label { font-weight: 400; display: flex; align-items: center; gap: 5px; margin: 0; }
.btn-calc {
  display: block;
  width: 100%;
  padding: 13px;
  font-size: 1.05rem;
  font-weight: 700;
  color: #fff;
  background: var(--c-accent);
  border: none;
  border-radius: 8px;
  cursor: pointer;
}
.btn-calc:hover { filter: brightness(1.08); }
.btn-calc:active { transform: translateY(1px); }

/* 結果 */
.result {
  margin-top: 16px;
  padding: 16px;
  background: var(--c-result-bg);
  border: 1.5px solid var(--c-result-border);
  border-radius: var(--radius);
}
.result-summary { font-size: 1.3rem; font-weight: 700; margin: 0 0 8px; color: var(--c-text); }
.result-error { color: #dc2626; font-weight: 600; margin: 0; }
.result table { width: 100%; border-collapse: collapse; margin: 10px 0 0; font-size: .92rem; }
.result th, .result td { border: 1px solid var(--c-result-border); padding: 7px 10px; text-align: left; }
.result th { background: rgba(252, 211, 77, .25); font-weight: 600; white-space: nowrap; }
.result-note { font-size: .82rem; color: var(--c-text-sub); margin: 10px 0 0; }
.result-highlight { background: rgba(252, 211, 77, .45); font-weight: 700; }

/* シェア */
.share { display: flex; flex-wrap: wrap; gap: 8px; margin: 18px 0; }
.share-btn {
  font-size: .8rem;
  padding: 7px 14px;
  border-radius: 999px;
  text-decoration: none;
  border: 1px solid var(--c-border);
  background: var(--c-bg-soft);
  color: var(--c-text);
  cursor: pointer;
  font-family: inherit;
}
.share-btn:hover { border-color: var(--c-primary); color: var(--c-primary); }

/* 本文 */
.usage ol, .usage ul { padding-left: 22px; }
.explanation table { width: 100%; border-collapse: collapse; margin: 12px 0; font-size: .9rem; }
.explanation th, .explanation td { border: 1px solid var(--c-border); padding: 7px 10px; }
.explanation th { background: var(--c-bg-soft); }

/* FAQ */
.faq details {
  border: 1px solid var(--c-border);
  border-radius: 8px;
  margin-bottom: 8px;
  background: var(--c-bg-soft);
}
.faq summary { padding: 12px 14px; font-weight: 600; cursor: pointer; font-size: .93rem; }
.faq .faq-a { padding: 0 14px 12px; font-size: .92rem; }

/* 関連ツール・カード */
.tool-cards { display: grid; grid-template-columns: 1fr; gap: 10px; list-style: none; padding: 0; margin: 12px 0; }
@media (min-width: 560px) { .tool-cards { grid-template-columns: 1fr 1fr; } }
.tool-card {
  display: block;
  padding: 13px 15px;
  border: 1px solid var(--c-border);
  border-radius: var(--radius);
  text-decoration: none;
  background: var(--c-bg);
}
.tool-card:hover { border-color: var(--c-primary); background: var(--c-primary-pale); }
.tool-card .tc-title { display: block; font-weight: 700; color: var(--c-primary); font-size: .95rem; }
.tool-card .tc-desc { display: block; font-size: .8rem; color: var(--c-text-sub); margin-top: 3px; line-height: 1.5; }

/* 収益スロット */
.monetize-slot { margin: 18px 0; }
.cta-box {
  border: 1.5px solid var(--c-accent);
  border-radius: var(--radius);
  padding: 16px;
  background: var(--c-bg);
}
.cta-box .cta-text { margin: 0 0 10px; font-size: .92rem; }
.cta-box .cta-btn {
  display: block;
  text-align: center;
  padding: 12px;
  background: var(--c-accent);
  color: #fff;
  font-weight: 700;
  border-radius: 8px;
  text-decoration: none;
}
.cta-box .cta-btn:hover { filter: brightness(1.08); color: #fff; }
.rakuten-btn {
  display: block;
  text-align: center;
  padding: 11px;
  border: 1.5px solid #bf0000;
  color: #bf0000;
  font-weight: 700;
  border-radius: 8px;
  text-decoration: none;
  font-size: .92rem;
}
.rakuten-btn:hover { background: #bf0000; color: #fff; }
@media (prefers-color-scheme: dark) {
  .rakuten-btn { border-color: #f87171; color: #f87171; }
  .rakuten-btn:hover { background: #b91c1c; color: #fff; }
}

/* index ヒーロー */
.hero { text-align: center; padding: 18px 0 6px; }
.hero h1 { font-size: 1.5rem; }
.hero p { color: var(--c-text-sub); font-size: .92rem; }
.category-section h2 { margin-top: 30px; }
.category-link { font-size: .82rem; }

/* ページメタ・フッター */
.page-meta { font-size: .78rem; color: var(--c-text-sub); margin-top: 30px; border-top: 1px solid var(--c-border); padding-top: 12px; }
.site-footer { background: var(--c-bg-soft); border-top: 1px solid var(--c-border); padding: 22px 0; margin-top: 20px; }
.footer-nav { display: flex; flex-wrap: wrap; gap: 6px 18px; font-size: .82rem; margin-bottom: 8px; }
.copyright { font-size: .78rem; color: var(--c-text-sub); margin: 0; }

/* 固定ページ */
.static-page h1 { margin-bottom: 18px; }
.static-page h2 { font-size: 1.05rem; }