:root{--color-brand:#014a86;--color-brand-dark:#013a6b;--color-brand-light:#0e538c;--color-accent:#148fb6;--color-accent-2:#1c97bf;--color-accent-light:#c7f2f5;--color-text:#111;--color-text-muted:#55606b;--color-heading:#0f1b2b;--color-bg:#fff;--color-bg-subtle:#f5f7fa;--color-border:#d7dde3;--color-border-strong:#ccc;--color-link:var(--color-brand);--color-link-hover:var(--color-accent-2);--font-sans:"Noto Sans JP", "YuGothic", "游ゴシック", "Yu Gothic", "Hiragino Sans", "Meiryo", sans-serif;--font-size-base:16px;--line-height-base:1.8;--line-height-heading:1.4;--space-1:.25rem;--space-2:.5rem;--space-3:.75rem;--space-4:1rem;--space-6:1.5rem;--space-8:2rem;--space-12:3rem;--space-16:4rem;--radius-sm:4px;--radius:8px;--radius-lg:12px;--border-width:1px;--shadow-sm:0 1px 2px #0f1b2b0f;--shadow:0 2px 8px #0f1b2b14;--shadow-md:0 6px 20px #0f1b2b1a;--content-width:72rem;--prose-width:44rem}*,:before,:after{box-sizing:border-box}html{font-size:var(--font-size-base);-webkit-text-size-adjust:100%}body{font-family:var(--font-sans);line-height:var(--line-height-base);color:var(--color-text);background:var(--color-bg);-webkit-font-smoothing:antialiased;text-rendering:optimizelegibility;margin:0}h1,h2,h3,h4{color:var(--color-heading);line-height:var(--line-height-heading);font-weight:700}a{color:var(--color-link);text-decoration:none}a:hover,a:focus-visible{color:var(--color-link-hover);text-decoration:underline}:focus-visible{outline:2px solid var(--color-accent-2);outline-offset:2px}img{max-width:100%;height:auto}.container{width:100%;max-width:var(--content-width);padding-inline:var(--space-4);margin-inline:auto}.visually-hidden{clip:rect(0, 0, 0, 0);white-space:nowrap;border:0;width:1px;height:1px;margin:-1px;padding:0;position:absolute;overflow:hidden}.skip-link{left:var(--space-2);z-index:100;background:var(--color-brand);color:#fff;padding:var(--space-2) var(--space-4);border-radius:var(--radius-sm);transition:top .15s;position:absolute;top:-3rem}.skip-link:focus{top:var(--space-2);color:#fff}.site-header[data-astro-cid-nen7h5rs]{background:var(--color-bg);border-bottom:var(--border-width) solid var(--color-border);z-index:50;position:sticky;top:0}.site-header__inner[data-astro-cid-nen7h5rs]{justify-content:space-between;align-items:center;gap:var(--space-4);min-height:64px;display:flex}.site-header__brand[data-astro-cid-nen7h5rs]{align-items:center;gap:var(--space-2);color:var(--color-brand);font-weight:700;display:inline-flex}.site-header__logo[data-astro-cid-nen7h5rs]{border-radius:var(--radius-sm);display:block}.site-header__brand[data-astro-cid-nen7h5rs]:hover{color:var(--color-brand-dark);text-decoration:none}.site-header__title[data-astro-cid-nen7h5rs]{font-size:1.05rem}.site-header__nav[data-astro-cid-nen7h5rs]{gap:var(--space-6);font-size:.95rem;display:flex}.site-header__nav[data-astro-cid-nen7h5rs] a[data-astro-cid-nen7h5rs]{color:var(--color-text-muted);font-weight:500}.site-header__nav[data-astro-cid-nen7h5rs] a[data-astro-cid-nen7h5rs]:hover{color:var(--color-brand)}@media (width<=480px){.site-header__title[data-astro-cid-nen7h5rs]{font-size:.95rem}.site-header__nav[data-astro-cid-nen7h5rs]{gap:var(--space-4);font-size:.85rem}}.site-footer[data-astro-cid-jo6i4kqk]{margin-top:var(--space-16);border-top:var(--border-width) solid var(--color-border);background:var(--color-bg-subtle);padding-block:var(--space-8)}.site-footer__inner[data-astro-cid-jo6i4kqk]{gap:var(--space-3);flex-direction:column;display:flex}.site-footer__links[data-astro-cid-jo6i4kqk]{gap:var(--space-6);flex-wrap:wrap;font-size:.9rem;display:flex}.site-footer__links[data-astro-cid-jo6i4kqk] a[data-astro-cid-jo6i4kqk]{color:var(--color-text-muted)}.site-footer__links[data-astro-cid-jo6i4kqk] a[data-astro-cid-jo6i4kqk]:hover{color:var(--color-brand)}.site-footer__copy[data-astro-cid-jo6i4kqk]{color:var(--color-text-muted);margin:0;font-size:.85rem}.site-main[data-astro-cid-z4jru4n3]{padding-block:var(--space-12);min-height:60vh}