/* デザインはこのファイルだけで着せ替えできる。色は :root の変数を差し替える。 */
:root {
  --accent: #0fb9c6;
  --accent-dark: #0a8a94;
  --ink: #12181f;
  --ink-soft: #5b6672;
  --bg: #ffffff;
  --bg-soft: #f4f7f9;
  --line: #e3e9ee;
  --radius: 14px;
  --maxw: 760px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: -apple-system, BlinkMacSystemFont, "Hiragino Sans", "Noto Sans JP", "Yu Gothic", sans-serif;
  font-size: 16px;
  line-height: 1.9;
  -webkit-font-smoothing: antialiased;
}
a { color: var(--accent-dark); text-decoration: none; }
a:hover { text-decoration: underline; }
img { max-width: 100%; height: auto; display: block; }

.wrap { max-width: var(--maxw); margin: 0 auto; padding: 0 20px; }
.wide { max-width: 1080px; }

/* header */
.site-header {
  position: sticky; top: 0; z-index: 50;
  background: rgba(255,255,255,.92);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line);
}
.site-header .inner {
  max-width: 1080px; margin: 0 auto; padding: 14px 20px;
  display: flex; align-items: center; justify-content: space-between; gap: 16px;
}
.logo { font-weight: 800; font-size: 18px; color: var(--ink); letter-spacing: .02em; }
.logo span { color: var(--accent); }
.nav { display: flex; gap: 18px; font-size: 14px; flex-wrap: wrap; }
.nav a { color: var(--ink-soft); }

/* hero */
.hero { padding: 56px 0 32px; text-align: center; background: var(--bg-soft); border-bottom: 1px solid var(--line); }
.hero h1 { font-size: 30px; line-height: 1.4; margin: 0 0 10px; letter-spacing: .01em; }
.hero p { margin: 0; color: var(--ink-soft); font-size: 15px; }

/* card grid */
.grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 26px; padding: 40px 0; }
.card { border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; background: #fff; transition: transform .2s, box-shadow .2s; }
.card:hover { transform: translateY(-3px); box-shadow: 0 12px 28px rgba(18,24,31,.08); }
.card a { color: inherit; text-decoration: none; display: block; }
.card .thumb { aspect-ratio: 1200/630; background: var(--bg-soft); }
.card .body { padding: 14px 16px 18px; }
.card .cat { font-size: 11px; color: var(--accent-dark); font-weight: 700; letter-spacing: .08em; }
.card h2 { font-size: 16px; line-height: 1.55; margin: 6px 0 8px; }
.card .meta { font-size: 12px; color: var(--ink-soft); }

/* article */
article.post { padding: 40px 0 20px; }
.post-head { margin-bottom: 24px; }
.breadcrumb { font-size: 12px; color: var(--ink-soft); margin-bottom: 14px; }
.post-head h1 { font-size: 28px; line-height: 1.5; margin: 8px 0 12px; }
.post-meta { font-size: 13px; color: var(--ink-soft); display: flex; gap: 14px; flex-wrap: wrap; }
.post-hero { border-radius: var(--radius); overflow: hidden; margin: 20px 0 8px; }
.disclosure { font-size: 12px; color: var(--ink-soft); background: var(--bg-soft); border-left: 3px solid var(--line); padding: 8px 12px; border-radius: 4px; }

.post-body h2 {
  font-size: 22px; line-height: 1.5; margin: 48px 0 16px; padding-left: 14px;
  border-left: 5px solid var(--accent);
}
.post-body h3 { font-size: 18px; margin: 32px 0 12px; }
.post-body p { margin: 0 0 18px; }
.post-body ul, .post-body ol { padding-left: 1.4em; margin: 0 0 20px; }
.post-body li { margin-bottom: 8px; }
.post-body blockquote { margin: 0 0 20px; padding: 12px 18px; background: var(--bg-soft); border-left: 4px solid var(--accent); border-radius: 0 8px 8px 0; color: var(--ink-soft); }
.post-body pre {
  background: #0f1720; color: #e6edf3; padding: 16px 18px; border-radius: 10px;
  overflow-x: auto; font-size: 13.5px; line-height: 1.7; margin: 0 0 22px;
}
.post-body code { font-family: "SFMono-Regular", Menlo, Consolas, monospace; font-size: .92em; }
.post-body :not(pre) > code { background: var(--bg-soft); padding: 2px 6px; border-radius: 5px; color: #b1364f; }
.table-scroll { overflow-x: auto; margin: 0 0 22px; }
.post-body table { border-collapse: collapse; width: 100%; font-size: 14.5px; }
.post-body th, .post-body td { border: 1px solid var(--line); padding: 9px 12px; text-align: left; }
.post-body th { background: var(--bg-soft); font-weight: 700; }

/* faq */
.faq { margin: 48px 0 0; }
.faq h2 { font-size: 22px; padding-left: 14px; border-left: 5px solid var(--accent); margin-bottom: 16px; }
.faq details { border: 1px solid var(--line); border-radius: 10px; padding: 12px 16px; margin-bottom: 10px; }
.faq summary { cursor: pointer; font-weight: 700; }
.faq details p { margin: 10px 0 0; color: var(--ink-soft); }

/* monetize */
.ad-slot { margin: 36px 0; text-align: center; min-height: 100px; }
.ad-label { display: block; font-size: 10px; color: #9aa5b1; letter-spacing: .12em; margin-bottom: 4px; }
.aff-box, .own-box { margin: 44px 0; border: 1px solid var(--line); border-radius: var(--radius); padding: 20px 22px; background: var(--bg-soft); }
.aff-title, .own-title { margin: 0 0 14px; font-size: 16px; }
.aff-list { list-style: none; padding: 0; margin: 0; }
.aff-list li { display: flex; justify-content: space-between; align-items: center; gap: 12px; flex-wrap: wrap; padding: 10px 0; border-bottom: 1px dashed var(--line); }
.aff-list li:last-child { border-bottom: none; }
.aff-term { font-weight: 700; font-size: 15px; }
.aff-links { display: flex; gap: 8px; }
.aff-btn { font-size: 13px; padding: 7px 14px; border-radius: 999px; color: #fff !important; text-decoration: none !important; white-space: nowrap; }
.aff-btn.amazon { background: #ff9900; }
.aff-btn.rakuten { background: #bf0000; }
.own-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 12px; }
.own-card { display: block; background: #fff; border: 1px solid var(--line); border-radius: 10px; padding: 14px 16px; color: var(--ink) !important; text-decoration: none !important; }
.own-card:hover { border-color: var(--accent); }
.own-card strong { display: block; font-size: 15px; margin-bottom: 4px; }
.own-card span { font-size: 12.5px; color: var(--ink-soft); }

/* related / pagination */
.related { margin: 48px 0 0; }
.related h2 { font-size: 18px; margin-bottom: 14px; }
.related ul { list-style: none; padding: 0; margin: 0; }
.related li { border-top: 1px solid var(--line); padding: 12px 0; }
.pager { display: flex; justify-content: center; gap: 10px; padding: 20px 0 60px; font-size: 14px; }
.pager a, .pager span { padding: 8px 14px; border: 1px solid var(--line); border-radius: 8px; }
.pager .current { background: var(--accent); color: #fff; border-color: var(--accent); }

/* page (about/privacy) */
.page-body h2 { font-size: 20px; margin: 36px 0 12px; padding-left: 12px; border-left: 4px solid var(--accent); }
.page-body { padding: 20px 0 40px; }

/* footer */
.site-footer { border-top: 1px solid var(--line); background: var(--bg-soft); padding: 36px 0; margin-top: 60px; font-size: 13px; color: var(--ink-soft); }
.site-footer .inner { max-width: 1080px; margin: 0 auto; padding: 0 20px; display: flex; justify-content: space-between; gap: 20px; flex-wrap: wrap; }
.site-footer a { color: var(--ink-soft); }
.foot-nav { display: flex; gap: 16px; flex-wrap: wrap; }

@media (max-width: 900px) {
  .grid { grid-template-columns: repeat(2, 1fr); gap: 20px; }
}
@media (max-width: 560px) {
  .grid { grid-template-columns: 1fr; }
  .hero h1 { font-size: 24px; }
  .post-head h1 { font-size: 23px; }
  .post-body h2 { font-size: 19px; }
  .own-grid { grid-template-columns: 1fr; }
  .aff-list li { flex-direction: column; align-items: flex-start; }
}