:root{--brand:#1b3a8b;--brand-ink:#0f214f;--brand-tint:#eaf0fb;--bg:#f7f8fa;--surface:#fff;--text:#14161c;--muted:#5b6472;--border:#e6e8ee;--shadow:0 1px 2px rgba(16,24,40,.04),0 8px 24px rgba(16,24,40,.06);--font-sans:"Inter","Noto Sans JP",system-ui,-apple-system,"Segoe UI","Hiragino Sans",Meiryo,sans-serif;--font-serif:"Noto Serif JP",Georgia,"Times New Roman",serif;--radius:16px;--radius-sm:10px;--maxw:960px}@media (prefers-color-scheme:dark){:root:not([data-theme=light]){--brand:#7aa2f7;--brand-ink:#cdd9f7;--brand-tint:#17203a;--bg:#0c0f17;--surface:#131824;--text:#e9edf6;--muted:#98a2b8;--border:#232a3a;--shadow:0 1px 2px rgba(0,0,0,.3),0 10px 30px rgba(0,0,0,.35)}}:root[data-theme=dark]{--brand:#7aa2f7;--brand-ink:#cdd9f7;--brand-tint:#17203a;--bg:#0c0f17;--surface:#131824;--text:#e9edf6;--muted:#98a2b8;--border:#232a3a;--shadow:0 1px 2px rgba(0,0,0,.3),0 10px 30px rgba(0,0,0,.35)}*{box-sizing:border-box}body,html{margin:0;padding:0}body{background:var(--bg);color:var(--text);font-family:var(--font-sans);line-height:1.75;-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility;min-height:100vh;display:flex;flex-direction:column}a{color:var(--brand);text-decoration:none}a:hover{text-decoration:underline}.container{width:100%;max-width:var(--maxw);margin:0 auto;padding:0 20px}.site-header{border-bottom:1px solid var(--border);background:color-mix(in srgb,var(--surface) 85%,transparent);-webkit-backdrop-filter:saturate(140%) blur(10px);backdrop-filter:saturate(140%) blur(10px);position:-webkit-sticky;position:sticky;top:0;z-index:20}.site-header .inner{display:flex;align-items:center;gap:12px;height:64px;max-width:var(--maxw);margin:0 auto;padding:0 20px}.logo-mark{width:32px;height:32px;flex:none;border-radius:9px;background:linear-gradient(135deg,var(--brand),var(--brand-ink));display:grid;place-items:center;color:#fff;font-size:1rem}.site-title{font-size:1rem;font-weight:700;letter-spacing:.01em;color:var(--text)}.site-sub{margin-left:auto;font-size:.78rem;color:var(--muted);letter-spacing:.02em}.hero{padding:56px 0 8px}.eyebrow{display:inline-block;font-size:.72rem;font-weight:700;letter-spacing:.14em;text-transform:uppercase;color:var(--brand);background:var(--brand-tint);padding:5px 12px;border-radius:999px}.hero h1{font-family:var(--font-serif);font-weight:700;font-size:clamp(1.7rem,4vw,2.6rem);line-height:1.3;margin:18px 0 10px;letter-spacing:.01em}.hero p{color:var(--muted);margin:0;font-size:.98rem}.card-list{list-style:none;padding:0;margin:28px 0 64px;display:grid;grid-gap:16px;gap:16px}.card{position:relative;background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:22px 24px;box-shadow:var(--shadow);transition:transform .14s ease,border-color .14s ease,box-shadow .14s ease}.card:hover{transform:translateY(-3px);border-color:color-mix(in srgb,var(--brand) 45%,var(--border))}.card h2{margin:0 0 12px;font-size:1.1rem;line-height:1.55;font-weight:700}.card h2 a{color:var(--text)}.card h2 a:hover{color:var(--brand);text-decoration:none}.meta{display:flex;flex-wrap:wrap;align-items:center;gap:10px 16px;font-size:.82rem;color:var(--muted)}.meta time{font-feature-settings:"tnum";font-variant-numeric:tabular-nums}.badge{display:inline-block;background:var(--brand-tint);color:var(--brand-ink);border-radius:999px;padding:3px 11px;font-size:.74rem}.badge,.ext{font-weight:600}.ext{margin-left:auto;font-size:.8rem}.detail{margin:40px 0 72px}.back{font-size:.85rem;color:var(--muted)}.back:hover{color:var(--brand);text-decoration:none}.detail h1{font-family:var(--font-serif);font-size:clamp(1.5rem,3.4vw,2.1rem);line-height:1.45;margin:18px 0 14px}.detail .meta{margin-bottom:24px}.ext-link{display:inline-flex;align-items:center;gap:8px;margin:4px 0 28px;background:var(--brand);color:#fff;font-weight:700;font-size:.92rem;padding:12px 20px;border-radius:var(--radius-sm);box-shadow:var(--shadow)}.ext-link:hover{text-decoration:none;filter:brightness(1.06)}.body{border-top:1px solid var(--border);padding-top:26px;font-size:1rem}.body :first-child{margin-top:0}.body img{max-width:100%;height:auto;border-radius:var(--radius-sm)}.body h1,.body h2,.body h3{line-height:1.4;font-weight:700}.body blockquote{margin:20px 0;padding:4px 18px;border-left:3px solid var(--brand);color:var(--muted)}.body pre{background:var(--brand-tint);padding:14px 16px;border-radius:var(--radius-sm);overflow-x:auto}.empty-body{color:var(--muted);font-size:.92rem}.site-footer{margin-top:auto;border-top:1px solid var(--border);color:var(--muted);font-size:.8rem;padding:28px 20px 56px;text-align:center}@media (max-width:520px){.hero{padding-top:40px}.card{padding:18px}.ext{margin-left:0;width:100%}}