.header[data-astro-cid-3ef6ksr2]{height:var(--header-height);border-bottom:1px solid var(--color-border);background:var(--color-surface);position:sticky;top:0;z-index:100}.header-inner[data-astro-cid-3ef6ksr2]{display:flex;align-items:center;justify-content:space-between;height:100%}.site-name[data-astro-cid-3ef6ksr2]{font-weight:700;font-size:1.1rem;color:var(--color-text);text-decoration:none}.site-name[data-astro-cid-3ef6ksr2]:hover{text-decoration:none;color:var(--color-accent)}.nav[data-astro-cid-3ef6ksr2]{display:flex;align-items:center;gap:1.25rem}.nav-link[data-astro-cid-3ef6ksr2]{font-size:.9rem;color:var(--color-text-muted);text-decoration:none;transition:color .15s}.nav-link[data-astro-cid-3ef6ksr2]:hover{color:var(--color-accent);text-decoration:none}.lang-switch[data-astro-cid-3ef6ksr2]{font-size:.8rem;padding:.2rem .5rem;border:1px solid var(--color-border);border-radius:4px}.nav--desktop[data-astro-cid-3ef6ksr2]{display:flex}.mobile-menu[data-astro-cid-3ef6ksr2]{display:none}.menu-toggle[data-astro-cid-3ef6ksr2]{cursor:pointer;list-style:none;padding:.5rem}.menu-toggle[data-astro-cid-3ef6ksr2]::-webkit-details-marker{display:none}.hamburger[data-astro-cid-3ef6ksr2]{display:block;width:20px;height:2px;background:var(--color-text);position:relative}.hamburger[data-astro-cid-3ef6ksr2]:before,.hamburger[data-astro-cid-3ef6ksr2]:after{content:"";display:block;width:20px;height:2px;background:var(--color-text);position:absolute}.hamburger[data-astro-cid-3ef6ksr2]:before{top:-6px}.hamburger[data-astro-cid-3ef6ksr2]:after{top:6px}.nav--mobile[data-astro-cid-3ef6ksr2]{position:absolute;top:var(--header-height);left:0;right:0;background:var(--color-surface);border-bottom:1px solid var(--color-border);flex-direction:column;padding:1rem 1.25rem;gap:.75rem}@media(max-width:768px){.nav--desktop[data-astro-cid-3ef6ksr2]{display:none}.mobile-menu[data-astro-cid-3ef6ksr2]{display:block}}.footer[data-astro-cid-sz7xmlte]{margin-top:4rem;padding:2rem 0;border-top:1px solid var(--color-border);text-align:center;font-size:.85rem;color:var(--color-text-muted)}.contact-hint[data-astro-cid-sz7xmlte]{margin-bottom:1rem;font-size:.9rem}.footer-links[data-astro-cid-sz7xmlte]{display:flex;justify-content:center;gap:1.5rem;margin-bottom:1rem}.footer-links[data-astro-cid-sz7xmlte] a[data-astro-cid-sz7xmlte]{color:var(--color-text-muted);text-decoration:none}.footer-links[data-astro-cid-sz7xmlte] a[data-astro-cid-sz7xmlte]:hover{color:var(--color-accent)}.copyright[data-astro-cid-sz7xmlte]{font-size:.8rem;margin-bottom:0}:root{--color-bg: #fafafa;--color-text: #1e293b;--color-text-muted: #64748b;--color-accent: #2563eb;--color-accent-hover: #1d4ed8;--color-border: #e2e8f0;--color-surface: #ffffff;--font-sans: "Helvetica Neue", Arial, "Hiragino Kaku Gothic ProN", "Hiragino Sans", Meiryo, sans-serif;--font-mono: "SF Mono", "Fira Code", "Fira Mono", Menlo, Consolas, monospace;--max-width: 720px;--header-height: 60px}*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}html{font-size:16px;scroll-behavior:smooth}body{font-family:var(--font-sans);color:var(--color-text);background-color:var(--color-bg);line-height:1.8;-webkit-font-smoothing:antialiased}a{color:var(--color-accent);text-decoration:none}a:hover{color:var(--color-accent-hover);text-decoration:underline}img{max-width:100%;height:auto}h1,h2,h3,h4{line-height:1.4;font-weight:700;color:var(--color-text)}h1{font-size:1.75rem;margin-bottom:1rem}h2{font-size:1.35rem;margin-top:2.5rem;margin-bottom:.75rem}h3{font-size:1.1rem;margin-top:1.5rem;margin-bottom:.5rem}p{margin-bottom:1rem}ul,ol{padding-left:1.5rem;margin-bottom:1rem}li{margin-bottom:.25rem}code{font-family:var(--font-mono);font-size:.9em;background:var(--color-border);padding:.15em .35em;border-radius:3px}pre{background:#1e293b;color:#e2e8f0;padding:1rem;border-radius:6px;overflow-x:auto;margin-bottom:1rem}pre code{background:none;padding:0}blockquote{border-left:3px solid var(--color-accent);padding-left:1rem;color:var(--color-text-muted);margin-bottom:1rem}hr{border:none;border-top:1px solid var(--color-border);margin:2rem 0}.container{max-width:var(--max-width);margin:0 auto;padding:0 1.25rem}.section{margin-bottom:3rem}.section-title{font-size:1.1rem;font-weight:600;color:var(--color-text-muted);text-transform:uppercase;letter-spacing:.05em;margin-bottom:1rem;padding-bottom:.5rem;border-bottom:1px solid var(--color-border)}