:root{
  --bg:#0f1318;
  --bg-2:#141a21;
  --surface:#1b232c;
  --surface-2:#222c37;
  --border:#2d3947;
  --text:#dce3ea;
  --muted:#94a2b1;
  --grass:#6cc04a;
  --grass-dark:#4e9a36;
  --iron:#aeb8c2;
  --poppy:#e2554b;
  --link:#8fd16f;
  --maxw:880px;
  --radius:4px;
}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  background:
    radial-gradient(1200px 500px at 50% -10%, #1a2630 0%, rgba(26,38,48,0) 60%),
    var(--bg);
  color:var(--text);
  font-family: system-ui, -apple-system, "Hiragino Kaku Gothic ProN", "Hiragino Sans", "Noto Sans JP", Meiryo, sans-serif;
  line-height:1.8;
  font-size:16px;
  letter-spacing:.01em;
}
a{color:var(--link);text-decoration:none}
a:hover{text-decoration:underline}
img{max-width:100%;height:auto}

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

/* header / nav */
.site-header{
  border-bottom:1px solid var(--border);
  background:rgba(15,19,24,.78);
  backdrop-filter:saturate(140%) blur(6px);
  position:sticky;top:0;z-index:10;
}
.nav{
  display:flex;align-items:center;gap:18px;
  max-width:var(--maxw);margin:0 auto;padding:12px 20px;
  flex-wrap:wrap;
}
.brand{display:flex;align-items:center;gap:10px;font-weight:700;color:var(--text);margin-right:auto}
.brand:hover{text-decoration:none}
.brand svg{display:block}
.brand .brand-mark{display:block;width:26px;height:26px;border-radius:5px;image-rendering:pixelated}
.brand .brand-text{font-size:15px;letter-spacing:.02em}
.nav a.navlink{color:var(--muted);font-size:14px;padding:4px 2px;border-bottom:2px solid transparent}
.nav a.navlink:hover{color:var(--text);text-decoration:none}
.nav a.navlink.active{color:var(--text);border-bottom-color:var(--grass)}

/* hero */
.hero{padding:64px 0 36px;text-align:center}
.hero .golem{margin:0 auto 22px;width:88px;height:88px}
.hero-portrait{display:block;margin:0 auto 22px;width:240px;max-width:80%;height:auto;border:1px solid var(--border);border-radius:var(--radius);background:#0d1217;image-rendering:pixelated}
.hero h1{font-size:30px;line-height:1.45;margin:0 0 16px;letter-spacing:.02em}
.hero .lead{color:var(--muted);max-width:640px;margin:0 auto;font-size:16px}
.hero .lead strong{color:var(--text)}
.hero-actions{display:flex;justify-content:center;flex-wrap:wrap;gap:10px;margin:24px 0 0}
.primary-action,.secondary-action{
  display:inline-flex;align-items:center;justify-content:center;min-height:40px;
  border:1px solid var(--border);border-radius:var(--radius);padding:7px 14px;
  font-size:14px;font-weight:700;color:var(--text);line-height:1.4;
}
.primary-action{background:var(--grass-dark);border-color:var(--grass);color:#f4fff1}
.secondary-action{background:var(--surface);color:var(--text)}
.primary-action:hover,.secondary-action:hover{border-color:var(--grass);text-decoration:none}
.kicker{color:var(--grass);font-size:13px;letter-spacing:.2em;text-transform:uppercase;margin:0 0 12px;font-weight:700}

/* featured project signal */
.feature-strip{
  display:grid;grid-template-columns:minmax(0,1fr) 320px;gap:24px;align-items:center;
  margin:10px 0 34px;padding:22px 0;border-top:1px solid var(--border);border-bottom:1px solid var(--border);
}
.feature-copy h2{font-size:22px;line-height:1.45;margin:0 0 10px}
.feature-copy p{margin:10px 0;color:var(--muted)}
.inline-cta{display:inline-block;margin-top:10px;color:var(--link);font-weight:700;font-size:14px}
.feature-media{margin:0;background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);overflow:hidden}
.feature-media img{display:block;width:100%;aspect-ratio:16/10;object-fit:cover;background:#0d1217}
.feature-media figcaption{padding:9px 11px;color:var(--muted);font-size:12px;line-height:1.6}

/* cards */
.cards{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:16px;margin:36px 0}
.card{
  display:block;background:var(--surface);border:1px solid var(--border);
  border-radius:var(--radius);padding:20px;color:var(--text);
  box-shadow:0 2px 0 rgba(0,0,0,.25);
  transition:border-color .15s, transform .15s;
}
.card:hover{border-color:var(--grass-dark);transform:translateY(-2px);text-decoration:none}
.card h3{margin:0 0 8px;font-size:17px}
.card p{margin:0;color:var(--muted);font-size:14px}
.card .arrow{color:var(--grass);font-size:13px;margin-top:12px;display:inline-block}
.card-step{
  display:inline-flex;align-items:center;justify-content:center;width:24px;height:24px;margin:0 0 10px;
  border:1px solid var(--grass-dark);border-radius:50%;color:var(--grass);font-size:13px;font-weight:700;
}

/* sections */
section{padding:8px 0}
.section-title{font-size:20px;margin:44px 0 6px;padding-bottom:8px;border-bottom:1px solid var(--border)}
.section-lead{color:var(--muted);font-size:15px;margin:6px 0 0}

/* prose / article */
.prose{padding:28px 0 8px}
.prose h1{font-size:26px;line-height:1.45;margin:0 0 6px}
.prose h2{font-size:19px;margin:36px 0 10px}
.prose h3{font-size:16px;margin:24px 0 6px;color:var(--iron)}
.prose p{margin:14px 0}
.prose ul{margin:14px 0;padding-left:1.3em}
.prose li{margin:6px 0}
.prose strong{color:#fff}
.prose code{background:#0d1217;border:1px solid var(--border);border-radius:3px;padding:1px 6px;font-size:.9em}

.article-meta{color:var(--muted);font-size:13px;margin:0 0 18px;letter-spacing:.04em}

.article-figure{margin:26px 0;background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);overflow:hidden}
.article-figure img{display:block;width:100%;background:#0d1217}
.article-figure figcaption{padding:10px 12px;color:var(--muted);font-size:13px;line-height:1.6}
.figure-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px;margin:26px 0}
.figure-grid .article-figure{margin:0}
.figure-grid .article-figure:first-child:nth-last-child(3){grid-column:1 / -1}
.diary-nav{display:flex;flex-wrap:wrap;gap:10px 16px;margin:30px 0 0;color:var(--muted);font-size:14px}
.diary-nav a{color:var(--muted)}
.prose [id]{scroll-margin-top:88px}
.term-nav{margin:18px 0 0;padding-top:16px;border-top:1px solid var(--border)}
.term-nav .term-nav-title{margin:0 0 8px;color:var(--muted);font-size:13px;font-weight:700;letter-spacing:.08em}
.term-links{display:flex;flex-wrap:wrap;gap:8px}
.term-link{
  display:inline-flex;align-items:center;border:1px solid var(--border);border-radius:var(--radius);
  background:var(--surface);color:var(--text);font-size:13px;font-weight:700;line-height:1.4;
  padding:4px 9px;letter-spacing:0;
}
.term-link:hover{border-color:var(--grass-dark);color:var(--text);text-decoration:none}

/* callout */
.callout{
  background:var(--bg-2);border:1px solid var(--border);border-left:3px solid var(--grass);
  border-radius:var(--radius);padding:14px 16px;margin:24px 0;color:var(--muted);font-size:14px;
}
.callout strong{color:var(--text)}

/* entry list (diary / tech index) */
.entry-list{list-style:none;margin:24px 0;padding:0}
.entry{
  border:1px solid var(--border);border-radius:var(--radius);background:var(--surface);
  padding:18px 20px;margin:0 0 14px;display:block;color:var(--text);
  box-shadow:0 2px 0 rgba(0,0,0,.2);transition:border-color .15s, transform .15s;
}
.entry.entry-with-thumb{display:grid;grid-template-columns:132px minmax(0,1fr);gap:16px;align-items:center;padding:14px 18px}
.entry-thumb{display:block;border:1px solid var(--border);border-radius:var(--radius);overflow:hidden;background:#0d1217}
.entry-thumb img{display:block;width:100%;aspect-ratio:16/9;object-fit:cover}
.entry-copy{display:block;min-width:0}
.entry:hover{border-color:var(--grass-dark);transform:translateY(-2px);text-decoration:none}
.entry .entry-day{color:var(--grass);font-weight:700;font-size:13px;letter-spacing:.1em}
.entry .entry-title{display:block;font-size:18px;margin:4px 0 6px;font-weight:700}
.entry .entry-digest{display:block;color:var(--muted);font-size:14px;margin:0}
.entry .entry-meta{color:var(--muted);font-size:12px;margin-top:10px;opacity:.85}

/* back link */
.back{display:inline-block;margin:28px 0 0;color:var(--muted);font-size:14px}

/* footer */
.site-footer{border-top:1px solid var(--border);margin-top:64px;padding:26px 0 48px;color:var(--muted);font-size:13px}
.site-footer .container{display:flex;flex-wrap:wrap;gap:8px 22px;align-items:center;justify-content:space-between}
.site-footer a{color:var(--muted)}

@media (max-width:560px){
  .hero h1{font-size:24px}
  .brand .brand-text{display:none}
  .feature-strip{grid-template-columns:1fr;gap:14px;margin-top:0;padding:18px 0}
  .entry.entry-with-thumb{grid-template-columns:104px minmax(0,1fr);gap:12px;padding:12px}
  .entry .entry-title{font-size:16px}
  .entry .entry-digest{font-size:13px}
  .figure-grid{grid-template-columns:1fr}
  .figure-grid .article-figure:first-child:nth-last-child(3){grid-column:auto}
  .site-footer .container{flex-direction:column;align-items:flex-start}
}