:root {
  --sea: #0f5c7a;
  --sea-deep: #0a3f55;
  --sea-light: #e6f1f5;
  --sand: #f3d9a4;
  --sand-light: #fbf5e8;
  --ink: #22313a;
  --muted: #5d6b73;
  --line: #d9e3e8;
  --white: #fff;
  --amazon: #f0a52b;
  --rakuten: #bf0000;
  --yahoo: #ff0033;
  --radius: 10px;
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  font-family: "Hiragino Kaku Gothic ProN", "Hiragino Sans", "Noto Sans JP", Meiryo, sans-serif;
  color: var(--ink);
  background: var(--white);
  line-height: 1.9;
  font-size: 16px;
}
a { color: var(--sea); }
img { max-width: 100%; height: auto; }
.wrap { max-width: 1040px; margin: 0 auto; padding: 0 20px; }

.pr-band {
  margin: 0; padding: 6px 20px; font-size: 12px; line-height: 1.6;
  text-align: center; background: var(--sand-light); color: var(--muted);
}

.site-header { background: var(--sea); color: var(--white); }
.site-header .wrap { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 10px 24px; padding-top: 14px; padding-bottom: 14px; }
.logo { display: flex; align-items: center; gap: 10px; color: var(--white); text-decoration: none; }
.logo-mark { width: 40px; height: 40px; flex: none; }
.logo-text { font-weight: 700; font-size: 20px; line-height: 1.25; letter-spacing: .02em; }
.logo-sub { display: block; font-size: 12px; font-weight: 500; color: var(--sand); letter-spacing: .1em; }
.nav { display: flex; flex-wrap: wrap; gap: 4px 18px; font-size: 14px; }
.nav a { color: var(--white); text-decoration: none; opacity: .9; }
.nav a:hover { opacity: 1; text-decoration: underline; }

.main { padding-top: 32px; padding-bottom: 64px; }

.hero {
  background: linear-gradient(160deg, var(--sea-light), var(--sand-light));
  border-radius: 16px; padding: 40px 32px; margin-bottom: 28px;
}
.hero-kicker { margin: 0 0 6px; color: var(--sea); font-weight: 700; font-size: 14px; letter-spacing: .08em; }
.hero-title { margin: 0 0 14px; font-size: clamp(26px, 5vw, 38px); line-height: 1.4; color: var(--sea-deep); }
.hero-lead { margin: 0; max-width: 640px; color: var(--ink); }

.cats { display: grid; grid-template-columns: repeat(auto-fit, minmax(210px, 1fr)); gap: 12px; margin-bottom: 40px; }
.cat-tile { display: block; padding: 14px 16px; border: 1px solid var(--line); border-radius: var(--radius); text-decoration: none; color: var(--ink); line-height: 1.6; }
.cat-tile:hover { border-color: var(--sea); }
.cat-tile strong { display: block; color: var(--sea); }
.cat-tile span { font-size: 13px; color: var(--muted); }

.section-title { font-size: 20px; margin: 40px 0 16px; padding-left: 12px; border-left: 4px solid var(--sea); line-height: 1.4; }
.cards { display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: 20px; }
.card { border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; background: var(--white); }
.card a { display: block; color: inherit; text-decoration: none; height: 100%; }
.card:hover { box-shadow: 0 4px 16px rgba(15, 92, 122, .12); }
.card-img { width: 100%; aspect-ratio: 16 / 9; object-fit: cover; display: block; }
.card-img-blank { display: flex; align-items: center; justify-content: center; background: linear-gradient(135deg, var(--sea), var(--sea-deep)); color: var(--sand); font-weight: 700; letter-spacing: .1em; }
.card-body { padding: 14px 16px 18px; }
.card-title { font-size: 17px; line-height: 1.5; margin: 4px 0 8px; }
.card-excerpt { margin: 0; font-size: 13px; color: var(--muted); line-height: 1.7; }

.meta { margin: 0; font-size: 13px; color: var(--muted); display: flex; flex-wrap: wrap; gap: 4px 10px; align-items: center; }
.cat { background: var(--sea-light); color: var(--sea); padding: 1px 8px; border-radius: 4px; font-weight: 700; font-size: 12px; }

.crumbs { font-size: 13px; color: var(--muted); margin-bottom: 16px; }
.crumbs a { color: var(--muted); }

.post { max-width: 760px; margin: 0 auto; }
.post-title, .page-title { font-size: clamp(23px, 4vw, 30px); line-height: 1.45; margin: 10px 0 12px; color: var(--sea-deep); }
.page-lead { color: var(--muted); margin-top: 0; }
.post-pr { font-size: 12px; color: var(--muted); background: var(--sand-light); display: inline-block; padding: 2px 10px; border-radius: 4px; margin: 0 0 20px; }
.post-hero { border-radius: var(--radius); margin-bottom: 24px; }

.toc { background: var(--sea-light); border-radius: var(--radius); padding: 14px 20px; margin: 0 0 28px; font-size: 15px; }
.toc-title { margin: 0 0 4px; font-weight: 700; color: var(--sea); }
.toc ol { margin: 0; padding-left: 1.4em; }

.prose h2 { font-size: 22px; line-height: 1.5; margin: 48px 0 16px; padding: 10px 14px; background: var(--sea); color: var(--white); border-radius: 6px; }
.prose h3 { font-size: 18px; margin: 32px 0 12px; padding-bottom: 6px; border-bottom: 2px solid var(--sea-light); }
.prose p { margin: 0 0 1.4em; }
.prose ul, .prose ol { padding-left: 1.4em; margin: 0 0 1.4em; }
.prose li { margin-bottom: .4em; }
.prose table { width: 100%; border-collapse: collapse; margin: 0 0 1.6em; font-size: 15px; }
.table-wrap { overflow-x: auto; margin: 0 0 1.6em; }
.table-wrap table { margin: 0; }
.prose th, .prose td { border: 1px solid var(--line); padding: 8px 12px; text-align: left; vertical-align: top; }
.prose th { background: var(--sea-light); white-space: nowrap; }
.prose img { border-radius: var(--radius); }
.prose blockquote { margin: 0 0 1.4em; padding: 12px 16px; background: var(--sand-light); border-left: 4px solid var(--sand); }
.prose .note { font-size: 14px; color: var(--muted); }

.product-box { display: flex; gap: 16px; border: 2px solid var(--line); border-radius: var(--radius); padding: 16px; margin: 0 0 1.6em; align-items: center; }
.product-img { width: 120px; flex: none; }
.product-name { font-weight: 700; margin: 0 0 4px; line-height: 1.5; }
.product-note { font-size: 13px; color: var(--muted); margin: 0 0 10px; line-height: 1.6; }
.shops { display: flex; flex-wrap: wrap; gap: 8px; }
.shop { display: inline-block; padding: 6px 14px; border-radius: 6px; color: var(--white); text-decoration: none; font-size: 14px; font-weight: 700; line-height: 1.5; }
.shop-amazon { background: var(--amazon); }
.shop-rakuten { background: var(--rakuten); }
.shop-yahoo { background: var(--yahoo); }
.shop-pending { font-size: 13px; color: var(--muted); }

.author-box { margin-top: 48px; padding: 18px 20px; border: 1px solid var(--line); border-radius: var(--radius); font-size: 14px; line-height: 1.8; }
.author-box p { margin: 0; }
.author-name { font-weight: 700; color: var(--sea); margin-bottom: 4px !important; }

.site-footer { background: var(--sea-deep); color: #cfe0e7; padding: 36px 0 28px; font-size: 14px; }
.footer-title { color: var(--white); font-weight: 700; margin: 0; }
.footer-tagline { margin: 0 0 14px; font-size: 13px; }
.footer-nav { display: flex; flex-wrap: wrap; gap: 6px 20px; margin-bottom: 14px; }
.footer-nav a { color: #cfe0e7; }
.copy { margin: 0; font-size: 12px; opacity: .8; }

@media (max-width: 600px) {
  .hero { padding: 28px 20px; }
  .product-box { flex-direction: column; align-items: flex-start; }
  .prose h2 { font-size: 19px; }
}