@charset "UTF-8";
/* ブログ共通CSS。site/index.html の :root 変数 / body / header / footer / btn を抽出して外部化。
   LP本体（index.html）のインラインCSSは触っていないので、変更時は両方に反映すること。 */

:root{
  --ink:#1a1817;
  --ink-soft:#4a4642;
  --vermillion:#c73e28;
  --vermillion-d:#a8301d;
  --paper:#f6f1e7;
  --cream:#faf7f2;
  --gold:#b8954a;
  --white:#ffffff;
  --gray-100:#f1ede6;
  --gray-200:#e2ddd3;
  --gray-400:#a8a299;
  --font-sans:"Zen Kaku Gothic New","Inter",-apple-system,"Hiragino Kaku Gothic ProN","Yu Gothic",sans-serif;
  --font-serif:"Noto Serif JP","Yu Mincho",serif;
  --font-num:"Inter","Zen Kaku Gothic New",sans-serif;
}
*{margin:0;padding:0;box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  font-family:var(--font-sans);
  color:var(--ink);
  background:var(--white);
  line-height:1.75;
  font-weight:500;
  font-feature-settings:"palt";
  text-rendering:optimizeLegibility;
  -webkit-font-smoothing:antialiased;
}
.wrap{max-width:1080px;margin:0 auto;padding:0 20px;}
.num{font-family:var(--font-num);font-weight:800;letter-spacing:-0.01em;}
em{font-style:normal;color:var(--vermillion);font-weight:700;}

/* ---- header ---- */
.site-header{position:sticky;top:0;z-index:60;background:rgba(255,255,255,.9);backdrop-filter:blur(12px);border-bottom:1px solid var(--gray-200);}
.site-header .wrap{display:flex;align-items:center;justify-content:space-between;height:60px;}
.logo{font-weight:900;font-size:1.35rem;letter-spacing:-0.02em;}
.logo a{color:inherit;text-decoration:none;}
.logo span{color:var(--vermillion);}
.logo small{display:inline-block;font-size:.6rem;font-weight:700;color:var(--gray-400);letter-spacing:.12em;margin-left:6px;vertical-align:super;}
.header-cta{font-size:.85rem;font-weight:700;background:var(--vermillion);color:#fff;padding:.5rem 1rem;border-radius:10px;text-decoration:none;}
.header-actions{display:flex;align-items:center;gap:14px;}
.header-login{font-size:.85rem;font-weight:700;color:var(--ink);text-decoration:none;}

/* ---- buttons ---- */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:.4rem;font-weight:700;text-decoration:none;border-radius:12px;padding:.95rem 1.6rem;font-size:1rem;transition:transform .15s ease;}
.btn:hover{transform:translateY(-2px);}
.btn-primary{background:var(--vermillion);color:#fff;box-shadow:0 10px 26px rgb(199 62 40 / .28);}
.btn-secondary{background:#fff;color:var(--ink);border:1px solid var(--gray-200);}

/* ---- footer ---- */
.site-footer{background:var(--ink);color:#8a857d;text-align:center;padding:40px 0;font-size:.8rem;}
.site-footer .logo{color:#fff;font-size:1.1rem;margin-bottom:8px;}
.disclaimer{max-width:760px;margin:14px auto 0;font-size:.7rem;line-height:1.7;color:#6b665f;}
.footer-links{margin-top:14px;font-size:.78rem;}
.footer-links a{color:#b9b3a9;text-decoration:underline;text-underline-offset:2px;}
.footer-links a:hover{color:#fff;}

/* ================= blog ================= */
.blog-main{padding:44px 0 72px;}
.blog-hero{background:linear-gradient(170deg,var(--cream) 0%,var(--paper) 100%);padding:44px 0 40px;}
.blog-hero h1{font-size:clamp(1.5rem,3vw,2rem);font-weight:900;line-height:1.4;}
.blog-hero p{margin-top:10px;color:var(--ink-soft);font-size:.95rem;}

/* breadcrumb */
.breadcrumb{font-size:.78rem;color:var(--gray-400);margin-bottom:14px;}
.breadcrumb a{color:var(--ink-soft);text-decoration:none;}
.breadcrumb a:hover{text-decoration:underline;}
.breadcrumb span{margin:0 .4rem;}

/* category filter */
.cat-nav{display:flex;flex-wrap:wrap;gap:10px;margin:26px 0 30px;}
.cat-nav a{font-size:.82rem;font-weight:700;text-decoration:none;color:var(--ink-soft);background:#fff;border:1px solid var(--gray-200);border-radius:999px;padding:.35rem .95rem;}
.cat-nav a:hover{border-color:var(--vermillion);color:var(--vermillion);}
.cat-nav a[aria-current="page"]{background:var(--vermillion);border-color:var(--vermillion);color:#fff;}

/* post list */
.post-grid{list-style:none;display:grid;grid-template-columns:repeat(3,1fr);gap:24px;}
.post-card{background:#fff;border:1px solid var(--gray-200);border-radius:16px;overflow:hidden;display:flex;flex-direction:column;transition:transform .15s ease,box-shadow .15s ease;}
.post-card:hover{transform:translateY(-3px);box-shadow:0 12px 30px rgb(26 24 23 / .1);}
.post-card a{text-decoration:none;color:inherit;display:flex;flex-direction:column;height:100%;}
.post-card img{width:100%;aspect-ratio:1200/630;object-fit:cover;display:block;background:var(--gray-100);}
.post-card .body{padding:1.1rem 1.2rem 1.3rem;display:flex;flex-direction:column;gap:.5rem;flex:1;}
.post-card h2{font-size:1rem;font-weight:900;line-height:1.5;}
.post-card .excerpt{font-size:.84rem;color:var(--ink-soft);line-height:1.7;}
.post-meta{display:flex;align-items:center;gap:10px;font-size:.72rem;color:var(--gray-400);margin-top:auto;padding-top:.4rem;}
.badge{display:inline-block;font-size:.7rem;font-weight:700;color:var(--vermillion);border:1px solid var(--vermillion);border-radius:999px;padding:.1rem .6rem;}
.empty{text-align:center;color:var(--ink-soft);padding:48px 0;font-size:.95rem;}

/* pagination */
.pager{display:flex;justify-content:center;gap:12px;margin-top:40px;}
.pager a{font-size:.85rem;font-weight:700;text-decoration:none;color:var(--ink);border:1px solid var(--gray-200);border-radius:10px;padding:.5rem 1.1rem;background:#fff;}
.pager a:hover{border-color:var(--vermillion);color:var(--vermillion);}

/* article */
.article{max-width:760px;margin:0 auto;}
.article h1{font-size:clamp(1.5rem,3.4vw,2.1rem);font-weight:900;line-height:1.42;margin-bottom:14px;}
.article .post-meta{margin:0 0 24px;padding:0;}
.article .eyecatch{width:100%;border-radius:16px;margin-bottom:30px;display:block;}
.article-body{font-size:1rem;line-height:1.95;}
.article-body h2{font-size:1.32rem;font-weight:900;line-height:1.5;margin:2.4em 0 .9em;padding-bottom:.35em;border-bottom:3px solid var(--vermillion);}
.article-body h3{font-size:1.1rem;font-weight:900;line-height:1.55;margin:2em 0 .7em;}
.article-body h4{font-size:1rem;font-weight:900;margin:1.6em 0 .6em;}
.article-body p{margin:1.1em 0;}
.article-body a{color:var(--vermillion);text-underline-offset:2px;}
.article-body ul,.article-body ol{margin:1.2em 0;padding-left:1.5em;}
.article-body li{margin:.4em 0;}
.article-body img{max-width:100%;height:auto;border-radius:12px;display:block;margin:1.6em auto;}
.article-body blockquote{margin:1.6em 0;padding:1rem 1.2rem;background:var(--cream);border-left:4px solid var(--gray-200);color:var(--ink-soft);border-radius:0 10px 10px 0;}
.article-body pre{margin:1.6em 0;padding:1rem 1.2rem;background:var(--ink);color:#f2eee7;border-radius:12px;overflow-x:auto;font-size:.85rem;line-height:1.7;}
.article-body code{font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-size:.9em;}
.article-body :not(pre)>code{background:var(--gray-100);padding:.15em .4em;border-radius:5px;}
.article-body table{width:100%;border-collapse:collapse;margin:1.6em 0;font-size:.9rem;display:block;overflow-x:auto;}
.article-body th,.article-body td{border:1px solid var(--gray-200);padding:.6rem .8rem;text-align:left;}
.article-body th{background:var(--gray-100);font-weight:700;}
.article-body hr{border:0;border-top:1px solid var(--gray-200);margin:2.4em 0;}

/* CTA */
.blog-cta{max-width:760px;margin:56px auto 0;background:linear-gradient(170deg,var(--cream) 0%,var(--paper) 100%);border:1px solid var(--gray-200);border-radius:18px;padding:2.2rem 1.8rem;text-align:center;}
.blog-cta h2{font-size:1.25rem;font-weight:900;line-height:1.5;margin-bottom:10px;}
.blog-cta p{font-size:.92rem;color:var(--ink-soft);margin-bottom:20px;}

/* related */
.related{max-width:760px;margin:56px auto 0;}
.related h2{font-size:1.15rem;font-weight:900;margin-bottom:18px;}
.related .post-grid{grid-template-columns:repeat(3,1fr);gap:16px;}
.related .post-card h2{font-size:.9rem;}

@media (max-width:860px){
  .post-grid{grid-template-columns:repeat(2,1fr);}
  .related .post-grid{grid-template-columns:repeat(2,1fr);}
}
@media (max-width:600px){
  .post-grid,.related .post-grid{grid-template-columns:1fr;}
  .header-login{display:none;}
}
@media (prefers-reduced-motion:reduce){
  *{animation:none !important;transition:none !important;}
}