/* MON-tech ブログ用スタイル（公式サイトのデザインシステム index.html と統一） */
:root {
  --paper: #FFFFFF; --bg: #F1F1EE; --surface: #FFFFFF;
  --ink: #111417; --ink-2: #3A3F42; --muted: #6B6F6E;
  --line: #E3E3DE; --line-strong: #C7C7C1; --grid: rgba(17,20,23,.045);
  --badge-bg: #111417; --badge-fg: #FFFFFF; --badge-bd: transparent;
  --btn-bg: #111417; --btn-fg: #FFFFFF;
  --inv-bg: #111417; --inv-fg: #FFFFFF; --inv-muted: #9DA0A0; --inv-line: rgba(255,255,255,.14);
  --shadow: 0 1px 2px rgba(17,20,23,.05), 0 16px 38px rgba(17,20,23,.08);
  /* カテゴリ色 */
  --cat-subsidy: #1f6f43; --cat-subsidy-bg: rgba(31,111,67,.10);
  --cat-web: #1f5c99; --cat-web-bg: rgba(31,92,153,.10);
  --font-gothic: "Helvetica Neue", Arial, "Hiragino Kaku Gothic ProN", "Yu Gothic", "YuGothic", Meiryo, system-ui, sans-serif;
  --font-mono: ui-monospace, "SF Mono", "SFMono-Regular", Menlo, Consolas, "Courier New", monospace;
  --maxw: 1140px; --readw: 720px;
}
@media (prefers-color-scheme: dark) {
  :root {
    --paper: #17191A; --bg: #0D0E0F; --surface: #16181A;
    --ink: #F2F2F0; --ink-2: #C4C6C3; --muted: #9A9C9A;
    --line: #242627; --line-strong: #333638; --grid: rgba(255,255,255,.04);
    --btn-bg: #F2F2F0; --btn-fg: #111417;
    --inv-bg: #08090A; --inv-fg: #F2F2F0; --inv-muted: #8A8D8C; --inv-line: rgba(255,255,255,.12);
    --shadow: 0 1px 2px rgba(0,0,0,.4), 0 20px 46px rgba(0,0,0,.45);
    --cat-subsidy: #6bd39b; --cat-subsidy-bg: rgba(107,211,155,.12);
    --cat-web: #7cbcff; --cat-web-bg: rgba(124,188,255,.12);
  }
}
:root[data-theme="dark"] {
  --paper: #17191A; --bg: #0D0E0F; --surface: #16181A;
  --ink: #F2F2F0; --ink-2: #C4C6C3; --muted: #9A9C9A;
  --line: #242627; --line-strong: #333638; --grid: rgba(255,255,255,.04);
  --btn-bg: #F2F2F0; --btn-fg: #111417;
  --inv-bg: #08090A; --inv-fg: #F2F2F0; --inv-muted: #8A8D8C; --inv-line: rgba(255,255,255,.12);
  --shadow: 0 1px 2px rgba(0,0,0,.4), 0 20px 46px rgba(0,0,0,.45);
  --cat-subsidy: #6bd39b; --cat-subsidy-bg: rgba(107,211,155,.12);
  --cat-web: #7cbcff; --cat-web-bg: rgba(124,188,255,.12);
}

* { box-sizing: border-box; }
html { background: var(--bg); -webkit-text-size-adjust: 100%; }
body { margin: 0; background: var(--bg); color: var(--ink); font-family: var(--font-gothic);
  line-height: 1.85; letter-spacing: .01em; -webkit-font-smoothing: antialiased; }
a { color: inherit; text-decoration: none; }
img { max-width: 100%; height: auto; }
.wrap { max-width: var(--maxw); margin: 0 auto; padding: 0 24px; }

/* ---- header（index.html と統一） ---- */
.hdr { position: sticky; top: 0; z-index: 30; background: color-mix(in srgb, var(--bg) 82%, transparent);
  backdrop-filter: saturate(1.1) blur(12px); border-bottom: 1px solid var(--line); }
.hdr .row { display: flex; align-items: center; justify-content: space-between; height: 70px; }
.logo { display: inline-flex; align-items: center; color: var(--ink); font-weight: 800; letter-spacing: -.035em; font-size: 1.42rem; }
.nav { display: flex; gap: 28px; align-items: center; }
.nav a { font-size: .9rem; font-weight: 600; color: var(--muted); transition: color .18s; }
.nav a:hover, .nav a[aria-current="page"] { color: var(--ink); }
.nav .cta { color: var(--btn-fg); background: var(--btn-bg); padding: 10px 18px; border-radius: 8px; font-weight: 800; font-size: .85rem; }
.nav .cta:hover { opacity: .88; }
@media (max-width: 820px) { .nav .link-only { display: none; } }

/* ---- 共通見出しバナー ---- */
.blog-hero { padding: 54px 0 30px; border-bottom: 1px solid var(--line);
  background-image: linear-gradient(var(--grid) 1px, transparent 1px), linear-gradient(90deg, var(--grid) 1px, transparent 1px);
  background-size: 46px 46px; }
.mono-label { font-family: var(--font-mono); font-size: .72rem; letter-spacing: .14em; text-transform: uppercase; color: var(--muted); display: inline-flex; align-items: center; gap: .8em; }
.mono-label::before { content: ""; width: 22px; height: 1px; background: currentColor; }
.blog-hero h1 { font-size: clamp(2rem, 5vw, 3rem); letter-spacing: -.03em; font-weight: 800; margin: 16px 0 0; }
.blog-hero p { color: var(--muted); margin: 14px 0 0; max-width: 40em; font-size: 1.02rem; }

/* ---- カテゴリ chips ---- */
.cat-filter { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 28px; }
.chip { font-size: .82rem; font-weight: 700; padding: 8px 16px; border-radius: 999px; border: 1px solid var(--line-strong);
  color: var(--ink); background: transparent; cursor: pointer; transition: all .16s; font-family: inherit; }
.chip:hover { border-color: var(--ink); }
.chip.active { background: var(--ink); color: var(--bg); border-color: var(--ink); }
.cat-tag { display: inline-flex; align-items: center; font-size: .68rem; font-weight: 800; letter-spacing: .04em;
  padding: 4px 11px; border-radius: 999px; }
.cat-tag[data-cat="subsidy"] { color: var(--cat-subsidy); background: var(--cat-subsidy-bg); }
.cat-tag[data-cat="web"] { color: var(--cat-web); background: var(--cat-web-bg); }

/* ---- 記事一覧 ---- */
.post-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 20px; padding: 48px 0 80px; }
@media (max-width: 760px) { .post-grid { grid-template-columns: 1fr; } }
.post-card { display: flex; flex-direction: column; background: var(--surface); border: 1px solid var(--line);
  border-radius: 14px; padding: 30px 28px; transition: transform .2s, border-color .2s, box-shadow .2s; }
.post-card:hover { transform: translateY(-4px); border-color: var(--ink); box-shadow: var(--shadow); }
.post-card .meta { display: flex; align-items: center; gap: 12px; }
.post-card time { font-family: var(--font-mono); font-size: .72rem; color: var(--muted); }
.post-card h2 { font-size: 1.28rem; line-height: 1.45; letter-spacing: -.02em; margin: 16px 0 0; font-weight: 800; }
.post-card p { color: var(--muted); font-size: .92rem; margin: 12px 0 0; flex: 1; }
.post-card .go { margin-top: 20px; font-weight: 800; font-size: .88rem; display: inline-flex; gap: 7px; align-items: center; transition: gap .18s; }
.post-card:hover .go { gap: 12px; }
.empty { padding: 60px 0; color: var(--muted); text-align: center; }

/* ---- 記事本文 ---- */
.article { max-width: var(--readw); margin: 0 auto; padding: 50px 24px 40px; }
.article .back { font-family: var(--font-mono); font-size: .74rem; color: var(--muted); display: inline-flex; gap: 7px; }
.article .back:hover { color: var(--ink); }
.article .a-head { margin: 22px 0 0; }
.article .a-meta { display: flex; align-items: center; gap: 12px; margin-top: 16px; }
.article time { font-family: var(--font-mono); font-size: .74rem; color: var(--muted); }
.article h1 { font-size: clamp(1.8rem, 4.4vw, 2.6rem); line-height: 1.3; letter-spacing: -.03em; font-weight: 800; margin: 18px 0 0; text-wrap: balance; }
.article .lead { color: var(--ink-2); font-size: 1.08rem; margin: 20px 0 0; }
.article .rule { height: 1px; background: var(--line); margin: 34px 0; }
.prose { font-size: 1.02rem; }
.prose h2 { font-size: 1.5rem; letter-spacing: -.02em; font-weight: 800; margin: 46px 0 0; padding-top: 6px; }
.prose h3 { font-size: 1.16rem; letter-spacing: -.01em; font-weight: 800; margin: 32px 0 0; }
.prose p { margin: 18px 0 0; color: var(--ink-2); }
.prose ul, .prose ol { margin: 16px 0 0; padding-left: 1.4em; color: var(--ink-2); }
.prose li { margin: 8px 0 0; }
.prose strong { color: var(--ink); font-weight: 700; }
.prose a { color: var(--cat-web); text-decoration: underline; text-underline-offset: 3px; }
.prose blockquote { margin: 22px 0 0; padding: 4px 0 4px 18px; border-left: 3px solid var(--line-strong); color: var(--muted); font-size: .94rem; }
.prose hr { border: 0; height: 1px; background: var(--line); margin: 34px 0; }
.prose code { font-family: var(--font-mono); font-size: .88em; background: var(--grid); padding: 2px 6px; border-radius: 5px; }
.a-cta { margin-top: 48px; background: var(--surface); border: 1px solid var(--line); border-radius: 16px; padding: 32px 30px; box-shadow: var(--shadow); }
.a-cta h3 { font-size: 1.2rem; font-weight: 800; letter-spacing: -.02em; }
.a-cta p { color: var(--muted); margin: 10px 0 0; font-size: .94rem; }
.btn { display: inline-flex; align-items: center; gap: 9px; padding: 13px 24px; border-radius: 9px; font-weight: 800; font-size: .92rem; margin-top: 20px;
  background: var(--btn-bg); color: var(--btn-fg); transition: opacity .18s, transform .18s; }
.btn:hover { opacity: .9; transform: translateY(-2px); }

/* ---- 関連記事 ---- */
.related { margin-top: 56px; padding-top: 32px; border-top: 1px solid var(--line); }
.related h2 { font-size: 1.2rem; font-weight: 800; letter-spacing: -.02em; }
.related-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; margin-top: 20px; }
@media (max-width: 640px) { .related-grid { grid-template-columns: 1fr; } }
.related-card { display: flex; flex-direction: column; gap: 10px; background: var(--surface); border: 1px solid var(--line);
  border-radius: 12px; padding: 18px 18px; transition: border-color .18s, transform .18s; }
.related-card:hover { border-color: var(--ink); transform: translateY(-3px); }
.related-card .rt { font-size: .92rem; font-weight: 700; line-height: 1.5; letter-spacing: -.01em; }

/* ---- footer（index.html と統一） ---- */
.foot { background: var(--inv-bg); color: var(--inv-fg); padding: 64px 0 40px; margin-top: 40px; }
.foot .big { font-size: clamp(2.6rem, 10vw, 6rem); font-weight: 800; letter-spacing: -.05em; line-height: .9; margin: 0 0 34px; }
.foot .top { display: flex; flex-direction: column; gap: 20px; }
@media (min-width: 820px) { .foot .top { flex-direction: row; justify-content: space-between; align-items: center; } }
.foot .links { display: flex; gap: 14px 24px; flex-wrap: wrap; }
.foot .links a { color: var(--inv-muted); font-size: .88rem; font-weight: 600; }
.foot .links a:hover { color: var(--inv-fg); }
.foot .rule { height: 1px; background: var(--inv-line); margin: 30px 0 16px; }
.foot .cp { color: var(--inv-muted); font-family: var(--font-mono); font-size: .74rem; }