:root{
  --paper:#F0F1F4;
  --paper-raised:#FFFFFF;
  --ink:#1F2933;
  --ink-soft:#5A6472;
  --indigo:#223A5E;
  --indigo-soft:#3E5A82;
  --indigo-tint:#DFE5EE;
  --vermillion:#B23A2E;
  --vermillion-tint:#F3E1DE;
  --line:#D3D8E0;
  --shadow: 0 1px 2px rgba(31,41,51,0.05), 0 10px 24px -16px rgba(31,41,51,0.16);
}
@media (prefers-color-scheme: dark){
  :root:not([data-theme="light"]){
    --paper:#15181E;
    --paper-raised:#1C212A;
    --ink:#E7E9EC;
    --ink-soft:#9AA3AF;
    --indigo:#93ACD0;
    --indigo-soft:#6E88AE;
    --indigo-tint:#232E44;
    --vermillion:#E28A7C;
    --vermillion-tint:#33221F;
    --line:#2E3542;
    --shadow: 0 1px 2px rgba(0,0,0,0.3), 0 10px 28px -16px rgba(0,0,0,0.5);
  }
}
:root[data-theme="dark"]{
  --paper:#15181E;
  --paper-raised:#1C212A;
  --ink:#E7E9EC;
  --ink-soft:#9AA3AF;
  --indigo:#93ACD0;
  --indigo-soft:#6E88AE;
  --indigo-tint:#232E44;
  --vermillion:#E28A7C;
  --vermillion-tint:#33221F;
  --line:#2E3542;
  --shadow: 0 1px 2px rgba(0,0,0,0.3), 0 10px 28px -16px rgba(0,0,0,0.5);
}

*{ box-sizing:border-box; }
html,body{ margin:0; }
body{
  background:var(--paper);
  color:var(--ink);
  font-family:"Zen Kaku Gothic New","Hiragino Sans","Noto Sans JP",sans-serif;
  line-height:1.8;
  font-size:16px;
}
a{ color:var(--indigo-soft); text-decoration:none; }
a:hover{ text-decoration:underline; }
.wrap{ max-width:760px; margin:0 auto; padding-inline:20px; }

.sitehead{
  background:var(--indigo);
  padding-block:28px;
}
.sitehead-inner{ display:flex; flex-direction:column; gap:6px; }
.brand{ display:flex; align-items:baseline; gap:10px; }
.brand-mark{
  font-family:"Shippori Mincho",serif;
  font-weight:700;
  font-size:22px;
  color:var(--vermillion-tint);
  border:1.5px solid var(--vermillion-tint);
  border-radius:4px;
  width:32px; height:32px;
  display:inline-flex; align-items:center; justify-content:center;
  flex-shrink:0;
}
.brand-name{
  font-family:"Shippori Mincho",serif;
  font-weight:700;
  font-size:24px;
  color:#fff;
}
.brand-tagline{
  color:#C9D4E4;
  font-size:13px;
  margin:0;
}

main.wrap{ padding-block:44px 60px; }

.hero{ padding-block: 8px 8px; margin-bottom:44px; }
.eyebrow{
  font-size:12.5px;
  letter-spacing:0.12em;
  color:var(--vermillion);
  font-weight:700;
  display:flex; align-items:center; gap:8px;
}
.eyebrow::before{ content:""; width:16px; height:2px; background:var(--vermillion); }
.hero h1{
  font-family:"Shippori Mincho",serif;
  font-size:clamp(26px,5vw,34px);
  margin:10px 0 12px;
  text-wrap:balance;
}
.hero-lede{
  color:var(--ink-soft);
  max-width:58ch;
  font-size:15px;
}

.sectiontitle{
  font-family:"Shippori Mincho",serif;
  font-size:15px;
  font-weight:700;
  color:var(--ink-soft);
  letter-spacing:0.05em;
  border-bottom:1px solid var(--line);
  padding-bottom:10px;
  margin-bottom:4px;
}
.posts{ list-style:none; margin:0; padding:0; }
.postrow{ border-bottom:1px solid var(--line); }
.postrow a{
  display:flex; flex-direction:column; gap:4px;
  padding-block:18px;
  color:var(--ink);
}
.postrow a:hover{ text-decoration:none; }
.postrow a:hover .posttitle{ color:var(--indigo-soft); text-decoration:underline; }
.postdate{
  font-size:12.5px;
  color:var(--ink-soft);
  font-variant-numeric:tabular-nums;
}
.posttitle{
  font-weight:700;
  font-size:17px;
}
.postexcerpt{
  font-size:13.5px;
  color:var(--ink-soft);
}

/* single post */
.post-head{ margin-bottom:28px; }
.post-kicker{
  font-size:12px;
  color:var(--vermillion);
  font-weight:700;
  letter-spacing:0.08em;
  margin:0 0 8px;
}
.post-head h1{
  font-family:"Shippori Mincho",serif;
  font-size:clamp(24px,4.5vw,30px);
  text-wrap:balance;
  margin:0 0 10px;
}
.post-meta{ color:var(--ink-soft); font-size:13px; margin:0; }

.post-body{
  max-width:68ch;
  font-size:16.5px;
}
.post-body h2{
  font-family:"Shippori Mincho",serif;
  font-size:21px;
  margin-top:2.2em;
  border-left:4px solid var(--vermillion);
  padding-left:12px;
}
.post-body p{ margin:1.1em 0; }
.post-body ul,.post-body ol{ padding-left:1.3em; }
.post-body li{ margin:0.4em 0; }
.post-body strong{ color:var(--indigo); }
.post-body hr{ border:none; border-top:1px solid var(--line); margin:2.4em 0; }
.post-body em{
  display:block;
  font-size:13px;
  color:var(--ink-soft);
  font-style:normal;
  background:var(--indigo-tint);
  border-radius:8px;
  padding:12px 14px;
}

.backlink{ margin-top:2.5em; font-size:14px; }

.sitefoot{
  border-top:1px solid var(--line);
  padding-block:24px;
  font-size:12.5px;
  color:var(--ink-soft);
}
.sitefoot .fine{ max-width:68ch; }

@media (max-width:480px){
  .sitehead{ padding-block:20px; }
}