:root{--color-canvas: #f4f7f5;--color-surface: #ffffff;--color-surface-muted: #eaf1ef;--color-text: #182527;--color-text-muted: #526164;--color-accent: #0b5c5e;--color-accent-strong: #074345;--color-border: #ccd9d6;--color-focus: #0b5c5e;--shadow-card: 0 12px 30px rgb(24 37 39 / 8%);--radius-sm: .375rem;--radius-md: .75rem;--radius-lg: 1.125rem;--space-1: .25rem;--space-2: .5rem;--space-3: .75rem;--space-4: 1rem;--space-5: 1.5rem;--space-6: 2rem;--space-7: 3rem;--space-8: 4.5rem;--content-width: 70rem;--article-width: 46rem;--font-sans: -apple-system, BlinkMacSystemFont, "Hiragino Sans", "Yu Gothic", "YuGothic", "Noto Sans JP", sans-serif}*,*:before,*:after{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--color-canvas);color:var(--color-text);font-family:var(--font-sans);font-size:1rem;font-weight:400;line-height:1.75;text-rendering:optimizeLegibility;-webkit-font-smoothing:antialiased}img,svg{display:block;max-width:100%;height:auto}a{color:var(--color-accent);text-decoration-thickness:.08em;text-underline-offset:.18em}a:hover{color:var(--color-accent-strong)}a:focus-visible,button:focus-visible,[tabindex]:focus-visible{outline:3px solid var(--color-focus);outline-offset:3px;border-radius:var(--radius-sm)}h1,h2,h3{margin-block:0 .65em;color:var(--color-text);font-weight:700;line-height:1.35;letter-spacing:.01em}h1{font-size:clamp(2rem,7vw,3.35rem)}h2{font-size:clamp(1.45rem,4vw,2rem)}h3{font-size:clamp(1.15rem,3vw,1.35rem)}p,ul,ol,dl{margin-block:0 1.25rem}.container{width:min(calc(100% - 2rem),var(--content-width));margin-inline:auto}.skip-link{position:fixed;z-index:100;top:var(--space-3);left:var(--space-3);padding:var(--space-2) var(--space-4);transform:translateY(-180%);border-radius:var(--radius-sm);background:var(--color-accent-strong);color:#fff;font-weight:700}.skip-link:focus{transform:translateY(0)}.site-header{border-bottom:1px solid var(--color-border);background:#fffffff5}.site-header__inner{display:flex;flex-direction:column;gap:var(--space-4);padding-block:var(--space-4)}.site-brand{display:inline-flex;flex-direction:column;width:fit-content;color:var(--color-text);text-decoration:none}.site-brand:hover{color:var(--color-accent)}.site-brand__name{font-size:1.25rem;font-weight:700;letter-spacing:.04em}.site-brand__tagline{color:var(--color-text-muted);font-size:.78rem;line-height:1.5}.site-nav ul,.footer-nav ul{display:flex;flex-wrap:wrap;gap:var(--space-2) var(--space-5);margin:0;padding:0;list-style:none}.site-nav a,.footer-nav a{color:var(--color-text);font-size:.92rem;font-weight:700;text-decoration:none}.site-nav a:hover,.site-nav a[aria-current=page],.footer-nav a:hover{color:var(--color-accent);text-decoration:underline;text-underline-offset:.3em}.site-main{min-height:60vh}.page-shell{width:min(calc(100% - 2rem),var(--article-width));margin-inline:auto;padding-block:var(--space-7) var(--space-8)}.page-shell>:last-child{margin-bottom:0}.page-lead{color:var(--color-text-muted);font-size:1.08rem}.site-footer{border-top:1px solid var(--color-border);background:var(--color-surface)}.site-footer__inner{display:grid;gap:var(--space-5);padding-block:var(--space-7)}.site-footer__about{max-width:36rem}.site-footer__name{margin-bottom:var(--space-2);font-weight:700}.site-footer__description,.site-footer__copyright{margin:0;color:var(--color-text-muted);font-size:.88rem}.site-footer__copyright{padding-top:var(--space-5);border-top:1px solid var(--color-border)}.prose{font-size:1rem}.prose h2{margin-top:var(--space-7);padding-bottom:var(--space-2);border-bottom:1px solid var(--color-border)}.prose h3{margin-top:var(--space-6)}.prose a{overflow-wrap:anywhere}.prose blockquote{margin-inline:0;padding:var(--space-4) var(--space-5);border-left:4px solid var(--color-accent);background:var(--color-surface-muted)}.prose code{padding:.1em .3em;border-radius:var(--radius-sm);background:var(--color-surface-muted);font-size:.92em}@media (min-width: 48rem){.site-header__inner{flex-direction:row;align-items:center;justify-content:space-between;min-height:5.25rem}.site-footer__inner{grid-template-columns:minmax(0,1fr) auto;align-items:start}.site-footer__copyright{grid-column:1 / -1}.page-shell{padding-block-start:var(--space-8)}}@media (prefers-reduced-motion: reduce){html{scroll-behavior:auto}*,*:before,*:after{scroll-behavior:auto!important}}