:root{--bg:#fafafa;--bg-elev:#ffffff;--bg-card:#ffffff;--text:#1a1a1a;--text-muted:#555555;--text-faint:#888888;--border:#e5e5e5;--border-strong:#cccccc;--accent:#0d6e5e;--accent-hover:#0a564a;--accent-light:#d6ebe5;--warn:#b86f00;--warn-bg:#fef4e6;--cta:#f76707;--cta-hover:#e55a00;--cta-light:#fff5eb;--font-sans:-apple-system,BlinkMacSystemFont,"Hiragino Kaku Gothic ProN","Hiragino Sans","Yu Gothic UI",sans-serif;--font-serif:"Noto Serif JP","Times New Roman",serif;--font-mono:"SF Mono",Menlo,Monaco,Consolas,monospace;--max-width:760px;--max-width-wide:1140px;--space-1:0.25rem;--space-2:0.5rem;--space-3:1rem;--space-4:1.5rem;--space-5:2rem;--space-6:3rem;--space-7:5rem;--radius-sm:4px;--radius-md:8px;--radius-lg:16px;--shadow-sm:0 1px 3px rgba(0,0,0,0.04);--shadow-md:0 4px 12px rgba(0,0,0,0.06);--shadow-lg:0 12px 32px rgba(0,0,0,0.08)}[data-theme=dark]{--bg:#0f1110;--bg-elev:#1a1c1b;--bg-card:#161817;--text:#ededed;--text-muted:#a8a8a8;--text-faint:#6c6c6c;--border:#2a2c2b;--border-strong:#3a3c3b;--accent:#4ec9a8;--accent-hover:#6cd9bc;--accent-light:#1c3530;--warn:#d99850;--warn-bg:#2a1f10;--cta:#ff8b3d;--cta-hover:#ffa162;--cta-light:#2a1a0e;--shadow-sm:0 1px 3px rgba(0,0,0,0.3);--shadow-md:0 4px 12px rgba(0,0,0,0.4);--shadow-lg:0 12px 32px rgba(0,0,0,0.5)}*{box-sizing:border-box;margin:0;padding:0}html{-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;text-rendering:optimizeLegibility}body{font-family:var(--font-sans);background:var(--bg);color:var(--text);line-height:1.7;font-size:16px;transition:background .2s ease,color .2s ease}a{color:var(--accent);text-decoration:none;transition:color .15s ease}a:hover{color:var(--accent-hover);text-decoration:underline}.container{max-width:var(--max-width)}.container,.container-wide{margin:0 auto;padding:0 var(--space-3)}.container-wide{max-width:var(--max-width-wide)}h1,h2,h3,h4,h5,h6{font-weight:700;line-height:1.3;margin-top:var(--space-5);margin-bottom:var(--space-3);letter-spacing:-.01em}h1{font-size:2.25rem}h2{font-size:1.75rem}h3{font-size:1.375rem}h4{font-size:1.125rem}ol,p,ul{margin-bottom:var(--space-3)}ol,ul{padding-left:var(--space-4)}li{margin-bottom:var(--space-1)}.article-body{font-size:1.0625rem;line-height:1.85}.article-body h2{margin-top:var(--space-6);padding-top:var(--space-3);border-top:1px solid var(--border)}.article-body h3{margin-top:var(--space-5)}.article-body img{max-width:100%;height:auto;border-radius:var(--radius-md);margin:var(--space-4) 0}.article-body blockquote{margin:var(--space-4) 0;padding:var(--space-3) var(--space-4);border-left:3px solid var(--accent);background:var(--bg-elev);color:var(--text-muted);font-style:italic;border-radius:0 var(--radius-md) var(--radius-md) 0}.article-body code{font-family:var(--font-mono);font-size:.9em;background:var(--bg-elev);padding:.125rem .375rem;border-radius:var(--radius-sm)}.article-body pre{background:var(--bg-elev);padding:var(--space-3);border-radius:var(--radius-md);overflow-x:auto;margin:var(--space-4) 0}.article-body pre code{background:none;padding:0}.card{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius-lg);padding:var(--space-4);transition:transform .2s ease,box-shadow .2s ease}.card:hover{transform:translateY(-2px);box-shadow:var(--shadow-md)}.button{display:inline-block;padding:var(--space-2) var(--space-4);background:var(--accent);border:none;border-radius:var(--radius-md);font-weight:600;font-size:1rem;cursor:pointer;transition:background .15s ease}.button,.button:hover{color:white;text-decoration:none}.button:hover{background:var(--accent-hover)}.button-outline{background:transparent;color:var(--accent);border:1px solid var(--accent)}.button-outline:hover{background:var(--accent-light)}.button-cta{display:inline-flex;align-items:center;gap:var(--space-2);padding:var(--space-2) var(--space-4);background:var(--cta);border:none;border-radius:var(--radius-md);font-weight:700;font-size:1rem;cursor:pointer;transition:background .15s ease,transform .1s ease,box-shadow .15s ease;box-shadow:0 2px 4px rgba(247,103,7,.2)}.button-cta,.button-cta:hover{color:white;text-decoration:none}.button-cta:hover{background:var(--cta-hover);transform:translateY(-1px);box-shadow:0 4px 12px rgba(247,103,7,.35)}.button-cta:active{transform:translateY(0)}.muted{color:var(--text-muted)}.faint{color:var(--text-faint)}.small{font-size:.875rem}.text-center{text-align:center}.product-card{display:grid;grid-template-columns:200px 1fr;grid-gap:var(--space-4);gap:var(--space-4);margin:var(--space-4) 0}.product-card-image{background:var(--bg-elev);border-radius:var(--radius-md);overflow:hidden;aspect-ratio:1/1;display:flex;align-items:center;justify-content:center}.product-card-image img{max-width:100%;max-height:100%;object-fit:contain}.product-card-body{display:flex;flex-direction:column}.product-card-image-link{display:block;text-decoration:none;transition:opacity .15s ease,transform .15s ease}.product-card-image-link:hover{opacity:.92;transform:scale(1.02)}.product-card-title-link{color:var(--text);text-decoration:none;transition:color .15s ease}.product-card-title-link:hover{color:var(--cta);text-decoration:none}@media (max-width:640px){h1{font-size:1.875rem}h2{font-size:1.5rem}h3{font-size:1.25rem}body{font-size:15px}.product-card{grid-template-columns:1fr}.product-card-image{aspect-ratio:1.5/1;max-height:280px}}