:root{--color-bg:#100f14;--color-bg-raised:#191822;--color-bg-sunken:#0a090d;--color-text:#e6e4ee;--color-text-muted:#9a96ac;--color-text-faint:#6b6779;--color-accent:#a894d8;--color-accent-strong:#c4b3ec;--color-border:#2a2836;--color-border-strong:#3d3a4e;--color-heading:#798bb7;--font-serif:"Hiragino Mincho ProN", "Yu Mincho", "YuMincho", "Noto Serif JP", serif;--font-sans:"Hiragino Sans", "Hiragino Kaku Gothic ProN", "Yu Gothic", "Noto Sans JP", system-ui, sans-serif;--font-textbook:"UD デジタル 教科書体 NK-R", "UD Digital 教科書体 NK-R", "游教科書体", "HGS教科書体", "HG教科書体", var(--font-serif);--text-xs:.75rem;--text-sm:.875rem;--text-base:1rem;--text-lg:1.125rem;--text-xl:1.375rem;--text-2xl:1.75rem;--text-3xl:2.25rem;--text-4xl:3rem;--leading-tight:1.3;--leading-normal:1.7;--leading-loose:2;--space-2xs:.25rem;--space-xs:.5rem;--space-sm:.75rem;--space-md:1rem;--space-lg:1.5rem;--space-xl:2.5rem;--space-2xl:4rem;--space-3xl:6rem;--width-content:44rem;--width-wide:64rem;--gutter:var(--space-lg);--bottom-nav-h:4.25rem;--radius-sm:2px;--radius-md:4px;--transition:.18s ease}@media (width>=48rem){:root{--gutter:var(--space-xl)}}:root[data-theme=light]{--color-bg:#faf9fc;--color-bg-raised:#fff;--color-bg-sunken:#f0eef4;--color-text:#201f29;--color-text-muted:#5c586b;--color-text-faint:#8b879a;--color-accent:#7c66b0;--color-accent-strong:#5d4a8f;--color-border:#e2dfea;--color-border-strong:#cec8dc;--color-heading:#243661}@media 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0;border:none;border-radius:50%;flex-shrink:0;place-content:center;padding:0;display:grid}.ThemeToggle-module__toggle__3QofH:hover{color:var(--color-accent-strong);background-color:var(--color-bg-raised)}.ThemeToggle-module__iconSun__UsBe5,.ThemeToggle-module__iconMoon__k4Bep{grid-area:1/1;width:1.15rem;height:1.15rem}.ThemeToggle-module__iconSun__UsBe5{display:none}:root[data-theme=light] .ThemeToggle-module__iconSun__UsBe5{display:block}:root[data-theme=light] .ThemeToggle-module__iconMoon__k4Bep{display:none}.SiteHeader-module__header__6cO89{view-transition-name:site-header;z-index:50;background-color:color-mix(in srgb, var(--color-bg) 88%, transparent);backdrop-filter:blur(8px);border-bottom:1px solid var(--color-border);position:sticky;top:0}.SiteHeader-module__inner__dgBrH{justify-content:space-between;align-items:center;gap:var(--space-md);max-width:var(--width-wide);padding:var(--space-md) var(--gutter);flex-wrap:wrap;margin-inline:auto;display:flex}.SiteHeader-module__brand__EtnEM{font-family:var(--font-textbook);font-size:var(--text-lg);letter-spacing:.08em;color:var(--color-heading);text-decoration:none}.SiteHeader-module__controls__yxq7X{align-items:center;gap:var(--space-sm);display:flex}.SiteHeader-module__nav__UPuFK{display:none}.SiteHeader-module__list__kY6Og{gap:var(--space-lg);display:flex}.SiteHeader-module__link__ti2aH{font-size:var(--text-sm);letter-spacing:.1em;color:var(--color-text-muted);padding:0;text-decoration:none;position:relative}.SiteHeader-module__link__ti2aH:hover{color:var(--color-accent-strong)}.SiteHeader-module__current__YrYHF{color:var(--color-text)}.SiteHeader-module__current__YrYHF:after{content:"";inset-inline:0;background-color:var(--color-accent);height:1px;position:absolute;bottom:-.4em}@media 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