:root{--background: hsl(0 0% 100%);--foreground: hsl(195 25% 25%);--primary: hsl(174 45% 64%);--accent: hsl(196 43% 30%);--muted: hsl(210 14% 97%);--muted-foreground: hsl(195 15% 50%);--border: hsl(174 20% 90%);--radius: .5rem;--content-width: 44rem;--wide-width: 68rem;--font-sans: "Poppins", "Hiragino Kaku Gothic ProN", "Hiragino Sans", Meiryo, "Noto Sans JP", ui-sans-serif, system-ui, sans-serif}*,*:before,*:after{box-sizing:border-box}html{-webkit-text-size-adjust:100%}body{margin:0;background:var(--background);color:var(--foreground);font-family:var(--font-sans);font-size:1.0625rem;line-height:1.7;-webkit-font-smoothing:antialiased}html:lang(ja) body{line-height:1.9}img,video{max-width:100%;height:auto}a{color:var(--accent);text-decoration-thickness:1px;text-underline-offset:2px}a:hover{color:var(--primary)}.wrap{width:100%;max-width:var(--wide-width);margin:0 auto;padding:0 1.25rem}.site-header{border-bottom:1px solid var(--border);background:var(--background)}.header-inner{display:flex;align-items:center;justify-content:space-between;gap:1rem;min-height:4rem;flex-wrap:wrap}.brand{display:inline-flex;align-items:center;gap:.5rem;font-weight:700;font-size:1.125rem;color:var(--foreground);text-decoration:none}.header-nav{display:flex;align-items:center;gap:1.25rem;font-size:.9375rem;font-weight:500;flex-wrap:wrap}.header-nav a{color:var(--muted-foreground);text-decoration:none}.header-nav a:hover{color:var(--accent)}.page-head{padding:3.5rem 0 2rem;max-width:var(--content-width)}.page-head h1{font-size:clamp(2rem,5vw,2.75rem);line-height:1.2;letter-spacing:-.02em;margin:0 0 .75rem}.page-head p{color:var(--muted-foreground);font-size:1.125rem;margin:0}.article-list{list-style:none;margin:0;padding:0 0 4rem;display:grid;gap:1.25rem;grid-template-columns:repeat(auto-fill,minmax(20rem,1fr))}.article-card{border:1px solid var(--border);border-radius:var(--radius);overflow:hidden;display:flex;flex-direction:column;background:var(--background);transition:box-shadow .15s ease,transform .15s ease}.article-card:hover{box-shadow:0 8px 24px #30485014;transform:translateY(-2px)}.article-card img{width:100%;aspect-ratio:16 / 9;-o-object-fit:cover;object-fit:cover;display:block}.article-card-body{padding:1.25rem;display:flex;flex-direction:column;gap:.5rem;flex:1}.article-card h2{font-size:1.1875rem;line-height:1.35;margin:0}.article-card h2 a{color:var(--foreground);text-decoration:none}.article-card h2 a:hover{color:var(--accent)}.article-card p{color:var(--muted-foreground);font-size:.9375rem;margin:0}.meta{color:var(--muted-foreground);font-size:.8125rem;display:flex;gap:.5rem;flex-wrap:wrap;align-items:center;margin:0}.empty{color:var(--muted-foreground);padding:2rem 0 5rem}.article{max-width:var(--content-width);margin:0 auto;padding:3rem 1.25rem 4rem}.article-header h1{font-size:clamp(1.875rem,4.5vw,2.5rem);line-height:1.25;letter-spacing:-.02em;margin:.75rem 0}.article-lede{color:var(--muted-foreground);font-size:1.125rem;margin:0 0 1.5rem}.article-cover{width:100%;border-radius:var(--radius);margin:0 0 2rem}.prose>*+*{margin-top:1.25rem}.prose h2{font-size:1.5rem;line-height:1.3;margin-top:2.5rem;letter-spacing:-.01em}.prose h3{font-size:1.1875rem;margin-top:2rem}.prose ul,.prose ol{padding-left:1.5rem}.prose li+li{margin-top:.375rem}.prose img{border-radius:var(--radius);display:block}.prose blockquote{margin:1.75rem 0;padding:.25rem 0 .25rem 1.25rem;border-left:3px solid var(--primary);color:var(--muted-foreground)}.prose code{background:var(--muted);padding:.15em .4em;border-radius:4px;font-size:.9em}.prose pre{background:var(--muted);padding:1rem 1.25rem;border-radius:var(--radius);overflow-x:auto;border:1px solid var(--border)}.prose pre code{background:none;padding:0}.prose table{width:100%;border-collapse:collapse;font-size:.9375rem}.prose th,.prose td{border:1px solid var(--border);padding:.625rem .75rem;text-align:left}.prose th{background:var(--muted)}.back-link{display:inline-block;font-size:.9375rem;font-weight:500;text-decoration:none}.cta{background:var(--muted);border-top:1px solid var(--border)}.cta-inner{padding:3rem 1.25rem;text-align:center;max-width:40rem}.cta-inner h2{margin:0 0 .5rem;font-size:1.5rem;line-height:1.3}.cta-inner p{margin:0 0 1.5rem;color:var(--muted-foreground)}.cta-button{display:inline-block;background:var(--primary);color:#fff;font-weight:600;padding:.75rem 1.5rem;border-radius:var(--radius);text-decoration:none}.cta-button:hover{background:var(--accent);color:#fff}.site-footer{border-top:1px solid var(--border);font-size:.875rem;color:var(--muted-foreground)}.footer-inner{display:flex;align-items:center;justify-content:space-between;gap:1rem;padding:1.5rem 1.25rem;flex-wrap:wrap}.footer-inner p{margin:0}.footer-nav{display:flex;gap:1.25rem;flex-wrap:wrap}.footer-nav a{color:var(--muted-foreground);text-decoration:none}.footer-nav a:hover{color:var(--accent)}