:root{--font-sans:"Hiragino Kaku Gothic ProN", "Hiragino Sans", "BIZ UDPGothic", "Yu Gothic", "Noto Sans JP", system-ui, sans-serif;--font-readable:"BIZ UDPGothic", "Hiragino Kaku Gothic ProN", "Noto Sans JP", system-ui, sans-serif;--font-mono:ui-monospace, "SFMono-Regular", "Consolas", monospace;--font-current:var(--font-sans);--text-scale:1;--line-height-body:1.75;--font-size-body:calc(1rem * var(--text-scale));--text-primary:#182027;--text-secondary:#56616a;--text-muted:#66727b;--background-primary:#fff;--background-secondary:#f5f7f8;--background-inset:#edf1f3;--border-default:#d5dde2;--border-strong:#84929c;--accent-primary:#173f62;--accent-hover:#0d2f4c;--accent-subtle:#e8eef4;--on-accent:#fff;--link:var(--accent-primary);--focus-ring:#b3560e;--danger:#a03123;--success:#2c6e49;--space-1:.25rem;--space-2:.5rem;--space-3:.875rem;--space-4:1.25rem;--space-5:1.75rem;--space-6:2.5rem;--content-width:78rem;--reading-width:56rem;--radius:2px;--touch-target:44px}[data-site=atlas]{--accent-primary:#176ea6;--accent-hover:#0e5686;--accent-subtle:#e5f2fa}[data-pref-font-size=large]{--text-scale:1.15}[data-pref-font-size=xlarge]{--text-scale:1.3}[data-pref-line-height=wide]{--line-height-body:2.2}[data-pref-font=readable]{--font-current:var(--font-readable);letter-spacing:.03em}[data-pref-bg=soft]{--background-primary:#f7f3e9;--background-secondary:#efe9db;--background-inset:#e7e0cf;--border-default:#d6cdb8}[data-pref-bg=dark]{color-scheme:dark;--text-primary:#e8e6e1;--text-secondary:#b5b1a8;--text-muted:#8f8b82;--background-primary:#191a1c;--background-secondary:#232427;--background-inset:#2b2c30;--border-default:#3d3e42;--border-strong:#6a6b70;--accent-primary:#7fa8cc;--accent-hover:#a3c2dd;--accent-subtle:#263341;--on-accent:#10151a;--link:#8db4d6;--focus-ring:#e8a45c}[data-site=atlas][data-pref-bg=dark],[data-pref-bg=dark] [data-site=atlas]{--accent-primary:#79bce6;--accent-hover:#a7d5f2;--accent-subtle:#203746;--link:#8bc9ed}[data-pref-contrast=high]{--text-primary:#000;--text-secondary:#1c1c1c;--text-muted:#333;--border-default:#444;--link:#002a70}[data-pref-contrast=high][data-pref-bg=dark]{--text-primary:#fff;--text-secondary:#f0f0f0;--text-muted:#d0d0d0;--border-default:#bbb;--link:#a8ccff}@media (prefers-reduced-motion:reduce){*,:before,:after{scroll-behavior:auto!important;transition-duration:.01ms!important;animation-duration:.01ms!important}}[data-pref-motion=reduced] *,[data-pref-motion=reduced] :before,[data-pref-motion=reduced] :after{scroll-behavior:auto!important;transition-duration:.01ms!important;animation-duration:.01ms!important}*,:before,:after{box-sizing:border-box}html{font-family:var(--font-current);-webkit-text-size-adjust:100%;font-size:100%}body{color:var(--text-primary);background:var(--background-primary);font-size:var(--font-size-body);line-height:var(--line-height-body);font-feature-settings:"palt" 1;margin:0}a{color:var(--link);text-underline-offset:.2em;text-decoration:underline}a:hover{color:var(--accent-hover)}:focus-visible{outline:3px solid var(--focus-ring);outline-offset:2px;border-radius:2px}.skip-link{z-index:100;padding:var(--space-2) var(--space-3);background:var(--accent-primary);color:var(--on-accent);position:absolute;top:0;left:-9999px}.skip-link:focus{left:var(--space-2)}h1,h2,h3,h4{color:var(--text-primary);letter-spacing:.01em;line-height:1.45}h1{font-size:calc(1.85rem * var(--text-scale));font-weight:650}h2{font-size:calc(1.3rem * var(--text-scale));font-weight:650}h3{font-size:calc(1.15rem * var(--text-scale))}img{max-width:100%;height:auto}code,pre,kbd{font-family:var(--font-mono)}pre{padding:var(--space-3);background:var(--background-inset);border-radius:var(--radius);line-height:1.6;overflow-x:auto}table{border-collapse:collapse;width:100%}th,td{border:0;border-bottom:1px solid var(--border-default);padding:var(--space-2) var(--space-3);text-align:left}th{background:var(--background-secondary)}hr{border:0;border-top:1px solid var(--border-default);margin:var(--space-5) 0}.container{max-width:var(--content-width);padding-inline:var(--space-3);margin-inline:auto}.reading{max-width:var(--reading-width)}.visually-hidden{clip:rect(0 0 0 0);white-space:nowrap;width:1px;height:1px;overflow:hidden;position:absolute!important}.button,button.button{justify-content:center;align-items:center;gap:var(--space-2);min-height:var(--touch-target);border:1px solid var(--accent-primary);background:var(--accent-primary);color:var(--on-accent);font:inherit;cursor:pointer;border-radius:0;padding:.5em 1.2em;text-decoration:none;display:inline-flex}.button:hover{background:var(--accent-hover);color:var(--on-accent)}.button-secondary{color:var(--accent-primary);background:0 0}.button-secondary:hover{background:var(--accent-subtle);color:var(--accent-hover)}.badge{border:1px solid var(--border-strong);font-size:calc(.8rem * var(--text-scale));color:var(--text-secondary);background:var(--background-secondary);white-space:nowrap;border-radius:0;padding:.1em .6em;display:inline-block}.badge-accent{border-color:var(--accent-primary);color:var(--accent-primary);background:var(--accent-subtle)}.breadcrumb ol{gap:var(--space-1);font-size:calc(.85rem * var(--text-scale));flex-wrap:wrap;margin:0;padding:0;list-style:none;display:flex}.breadcrumb li+li:before{content:"›";margin:0 var(--space-1);color:var(--text-muted)}.card-grid{gap:var(--space-4);margin:var(--space-3) 0;grid-template-columns:repeat(auto-fill,minmax(16rem,1fr));padding:0;list-style:none;display:grid}.card{border:0;border-top:2px solid var(--accent-primary);border-bottom:1px solid var(--border-default);padding:var(--space-3) 0 var(--space-4);gap:var(--space-2);background:0 0;border-radius:0;flex-direction:column;display:flex}.card h3{margin:0}label{margin-bottom:var(--space-1);font-weight:600;display:block}input,select,textarea{font:inherit;color:var(--text-primary);background:var(--background-primary);border:1px solid var(--border-strong);min-height:var(--touch-target);border-radius:0;max-width:100%;padding:.4em .6em}details{border:0;border-top:1px solid var(--border-default);border-bottom:1px solid var(--border-default);border-radius:0}details summary{cursor:pointer;padding:var(--space-2) var(--space-3);min-height:var(--touch-target);align-items:center;font-weight:600;list-style-position:inside;display:flex}details[open]>summary{border-bottom:1px solid var(--border-default)}details .details-body{padding:var(--space-3)}.katex-display{padding:var(--space-1) 0;overflow:auto hidden}.katex .cjk_fallback{font-family:var(--font-current);font-size:1em;font-style:normal}@media (width<=767px){h1{font-size:calc(1.45rem * var(--text-scale))}input,select,textarea{font-size:max(16px,1rem)}body{overflow-wrap:break-word}.article-body table{width:100%;display:block;overflow-x:auto}}[data-scroll-region]{scrollbar-width:auto;scrollbar-color:var(--border-strong) var(--background-secondary);scrollbar-gutter:stable both-edges}[data-scroll-region]::-webkit-scrollbar{width:.75rem;display:block}[data-scroll-region]::-webkit-scrollbar-track{background:var(--background-secondary);border-radius:999px}[data-scroll-region]::-webkit-scrollbar-thumb{background:var(--border-strong);border:2px solid var(--background-secondary);border-radius:999px}