/* ==================== Reset & Base ==================== */
*,*::before,*::after{margin:0;padding:0;box-sizing:border-box}
:root{
  --c-bg:#faf8f5;
  --c-text:#2d2a26;
  --c-text-sub:#6b6560;
  --c-text-muted:#9c958c;
  --c-accent:#c45a3c;
  --c-accent-soft:#e08363;
  --c-border:#e5ddd3;
  --c-border-light:#f0ebe2;
  --c-bg-warm:#f5f0e8;
  --c-bg-card:#fff;
  --c-shadow:0 1px 3px rgba(45,42,38,.06);
  --c-shadow-hover:0 4px 16px rgba(45,42,38,.10);
  --w-main:640px;
  --w-side:260px;
  --w-layout:960px;
}
html{font-size:16px;-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  font-family:-apple-system,BlinkMacSystemFont,'Hiragino Sans','Hiragino Kaku Gothic ProN','Yu Gothic','Meiryo',sans-serif;
  background:var(--c-bg);color:var(--c-text);line-height:1.9;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;height:auto;display:block}
a{color:var(--c-accent);text-decoration:none;transition:color .15s,opacity .15s}
a:hover{color:#a8432a}
.serif{font-family:'Noto Serif JP',serif}

/* ==================== Header ==================== */
.site-header{
  background:var(--c-bg);
  border-bottom:1px solid var(--c-border);
  position:sticky;top:0;z-index:100;
}
.header-inner{
  max-width:var(--w-layout);margin:0 auto;
  display:flex;justify-content:space-between;align-items:center;
  padding:18px 24px;
}
.site-logo{
  font-family:'Noto Serif JP',serif;font-weight:900;
  font-size:1.35rem;color:var(--c-text);letter-spacing:.02em;
  display:inline-flex;align-items:baseline;gap:6px;
}
.site-logo .logo-dot{
  display:inline-block;width:8px;height:8px;border-radius:50%;
  background:var(--c-accent);transform:translateY(-2px);
}
.site-nav{display:flex;gap:28px;font-size:.9rem;font-weight:600}
.site-nav a{color:var(--c-text-sub)}
.site-nav a:hover{color:var(--c-accent)}

/* ==================== Layout ==================== */
.layout{
  max-width:var(--w-layout);margin:0 auto;padding:40px 24px 64px;
  display:grid;
  grid-template-columns:minmax(0,var(--w-main)) var(--w-side);
  gap:48px;
  align-items:start;
}
.main-col{min-width:0}
.side-col{position:sticky;top:80px}

/* ==================== Hero (top page) ==================== */
.page-hero{
  border-bottom:1px solid var(--c-border);
  padding-bottom:36px;margin-bottom:36px;
}
.page-hero .eyebrow{
  font-size:.72rem;font-weight:700;letter-spacing:.22em;
  color:var(--c-accent);text-transform:uppercase;
  margin-bottom:14px;
}
.page-hero h1{
  font-family:'Noto Serif JP',serif;font-weight:900;
  font-size:clamp(1.6rem,4.2vw,2.1rem);line-height:1.55;
  margin-bottom:18px;letter-spacing:.02em;
}
.page-hero h1 .accent{
  background:linear-gradient(transparent 65%,rgba(196,90,60,.18) 65%);
  padding:0 .15em;
}
.page-hero p{
  font-size:.98rem;color:var(--c-text-sub);line-height:1.95;
}

/* ==================== Section ==================== */
.section{margin-bottom:48px}
.section:last-child{margin-bottom:0}
.section-title{
  font-family:'Noto Serif JP',serif;font-weight:700;
  font-size:1.2rem;letter-spacing:.04em;
  margin-bottom:20px;padding-bottom:10px;
  border-bottom:1px solid var(--c-border);
  position:relative;
}
.section-title::after{
  content:'';position:absolute;bottom:-1px;left:0;width:48px;height:2px;
  background:var(--c-accent);
}

/* ==================== Article List (top page) ==================== */
.post-list{display:flex;flex-direction:column;gap:8px}
.post-item{
  display:block;padding:20px 4px;
  border-bottom:1px solid var(--c-border-light);
  transition:background .15s;
}
.post-item:last-child{border-bottom:none}
.post-item:hover{background:rgba(245,240,232,.5)}
.post-cat{
  display:inline-block;font-size:.7rem;font-weight:700;
  letter-spacing:.14em;color:var(--c-accent);
  text-transform:uppercase;margin-bottom:8px;
}
.post-title{
  font-family:'Noto Serif JP',serif;font-weight:700;
  font-size:1.08rem;line-height:1.6;color:var(--c-text);
  margin-bottom:8px;
}
.post-item:hover .post-title{color:var(--c-accent)}
.post-excerpt{
  font-size:.9rem;color:var(--c-text-sub);line-height:1.8;
  margin-bottom:8px;
}
.post-meta{
  font-size:.78rem;color:var(--c-text-muted);
  display:flex;gap:14px;align-items:center;
}
.post-meta .dot{
  display:inline-block;width:3px;height:3px;border-radius:50%;
  background:var(--c-text-muted);
}

/* ==================== Article Page ==================== */
.article-head{
  margin-bottom:32px;padding-bottom:24px;
  border-bottom:1px solid var(--c-border);
}
.breadcrumb{
  font-size:.78rem;color:var(--c-text-muted);
  margin-bottom:18px;
}
.breadcrumb a{color:var(--c-text-sub)}
.breadcrumb a:hover{color:var(--c-accent)}
.breadcrumb .sep{margin:0 8px;color:var(--c-text-muted)}
.article-cat-label{
  display:inline-block;font-size:.72rem;font-weight:700;
  letter-spacing:.16em;color:var(--c-accent);
  text-transform:uppercase;margin-bottom:14px;
}
.article-title{
  font-family:'Noto Serif JP',serif;font-weight:900;
  font-size:clamp(1.5rem,4vw,1.95rem);line-height:1.55;
  letter-spacing:.02em;margin-bottom:16px;
}
.article-meta{
  font-size:.82rem;color:var(--c-text-muted);
  display:flex;gap:14px;align-items:center;
}

.article-body{
  font-size:1rem;line-height:2;color:var(--c-text);
}
.article-body h2{
  font-family:'Noto Serif JP',serif;font-weight:700;
  font-size:1.35rem;line-height:1.6;letter-spacing:.02em;
  margin:48px 0 18px;padding-left:14px;
  border-left:4px solid var(--c-accent);
}
.article-body h3{
  font-family:'Noto Serif JP',serif;font-weight:700;
  font-size:1.1rem;line-height:1.6;
  margin:32px 0 12px;color:var(--c-text);
}
.article-body p{margin-bottom:1.6em}
.article-body p:last-child{margin-bottom:0}
.article-body ul,.article-body ol{
  margin:0 0 1.6em 1.4em;padding-left:.5em;
}
.article-body ul li,.article-body ol li{
  margin-bottom:.6em;line-height:1.95;
}
.article-body blockquote{
  margin:1.8em 0;padding:18px 22px;
  background:var(--c-bg-warm);
  border-left:3px solid var(--c-accent-soft);
  font-size:.94rem;line-height:1.95;color:var(--c-text-sub);
  border-radius:2px;
}
.article-body strong{font-weight:700;color:var(--c-text)}
.article-body em{font-style:normal;background:linear-gradient(transparent 65%,rgba(184,146,62,.22) 65%);padding:0 .1em}
.article-body a{
  color:var(--c-accent);
  border-bottom:1px solid rgba(196,90,60,.3);
}
.article-body a:hover{border-bottom-color:var(--c-accent)}

.article-foot{
  margin-top:56px;padding-top:32px;
  border-top:1px solid var(--c-border);
}
.editor-note{
  background:var(--c-bg-warm);
  border-radius:8px;padding:24px 26px;
  font-size:.92rem;line-height:1.95;color:var(--c-text-sub);
}
.editor-note .label{
  font-size:.72rem;font-weight:700;letter-spacing:.18em;
  color:var(--c-accent);text-transform:uppercase;
  margin-bottom:10px;display:block;
}
.back-link{
  display:inline-block;margin-top:32px;
  font-size:.88rem;font-weight:600;color:var(--c-text-sub);
}
.back-link:hover{color:var(--c-accent)}

/* ==================== Sidebar ==================== */
.side-block{
  margin-bottom:36px;
}
.side-block:last-child{margin-bottom:0}
.side-title{
  font-family:'Noto Serif JP',serif;font-weight:700;
  font-size:.92rem;letter-spacing:.12em;
  text-transform:uppercase;color:var(--c-text);
  margin-bottom:14px;padding-bottom:8px;
  border-bottom:1px solid var(--c-border);
  position:relative;
}
.side-title::after{
  content:'';position:absolute;bottom:-1px;left:0;width:32px;height:2px;
  background:var(--c-accent);
}
.side-cat-list{list-style:none}
.side-cat-list li{
  border-bottom:1px solid var(--c-border-light);
}
.side-cat-list li:last-child{border-bottom:none}
.side-cat-list a{
  display:flex;justify-content:space-between;align-items:center;
  padding:10px 2px;color:var(--c-text-sub);font-size:.9rem;
}
.side-cat-list a:hover{color:var(--c-accent)}
.side-cat-list .en{
  font-size:.7rem;color:var(--c-text-muted);letter-spacing:.1em;
}
.side-recent{list-style:none}
.side-recent li{
  margin-bottom:14px;padding-bottom:14px;
  border-bottom:1px solid var(--c-border-light);
}
.side-recent li:last-child{border-bottom:none;margin-bottom:0;padding-bottom:0}
.side-recent a{color:var(--c-text)}
.side-recent a:hover{color:var(--c-accent)}
.side-recent .r-cat{
  font-size:.66rem;font-weight:700;letter-spacing:.12em;
  color:var(--c-accent);text-transform:uppercase;
  display:block;margin-bottom:4px;
}
.side-recent .r-title{
  font-family:'Noto Serif JP',serif;font-weight:700;
  font-size:.88rem;line-height:1.55;
}
.side-about{font-size:.86rem;line-height:1.85;color:var(--c-text-sub)}
.side-about p{margin-bottom:.8em}
.side-about p:last-child{margin-bottom:0}

/* ==================== Footer ==================== */
.site-footer{
  background:#2d2a26;color:#cfc8bf;
  padding:40px 24px 24px;margin-top:48px;
}
.footer-inner{max-width:var(--w-layout);margin:0 auto;text-align:center}
.footer-logo{
  font-family:'Noto Serif JP',serif;font-weight:900;
  font-size:1.05rem;color:#fff;margin-bottom:6px;
}
.footer-tagline{font-size:.82rem;color:#9c958c;margin-bottom:20px}
.footer-links{
  display:flex;justify-content:center;flex-wrap:wrap;gap:8px 22px;
  font-size:.82rem;margin-bottom:20px;
}
.footer-links a{color:#cfc8bf}
.footer-links a:hover{color:#fff}
.footer-copy{
  font-size:.74rem;color:#7c766e;
  padding-top:16px;border-top:1px solid #4a453f;
}

/* ==================== Responsive ==================== */
@media(max-width:920px){
  .layout{
    grid-template-columns:1fr;
    gap:48px;max-width:var(--w-main);
  }
  .side-col{position:static}
  .side-block{
    background:var(--c-bg-card);
    border:1px solid var(--c-border);
    border-radius:8px;padding:20px 22px;
  }
}
@media(max-width:640px){
  .header-inner{padding:14px 18px}
  .site-nav{gap:18px;font-size:.84rem}
  .layout{padding:28px 18px 48px;gap:36px}
  .page-hero{padding-bottom:28px;margin-bottom:28px}
  .article-body h2{font-size:1.18rem;margin:36px 0 14px}
  .article-body h3{font-size:1.02rem;margin:24px 0 10px}
  .editor-note{padding:18px 20px}
  .site-footer{padding:32px 18px 20px;margin-top:36px}
}
@media(max-width:420px){
  .site-nav{gap:14px;font-size:.8rem}
}