@font-face{font-family:Mincho Fallback;src:local(Hiragino Mincho ProN),local(Yu Mincho),local(YuMincho),local(Noto Serif CJK JP),local(Noto Serif JP),local(MS PMincho);ascent-override:116%;descent-override:29%;line-gap-override:0%}@font-face{font-family:Gothic Fallback;src:local(Hiragino Sans),local(Hiragino Kaku Gothic ProN),local(Yu Gothic),local(YuGothic),local(Noto Sans CJK JP),local(Noto Sans JP),local(Meiryo);ascent-override:116%;descent-override:29%;line-gap-override:0%}:root,[data-theme=light]{color-scheme:light;--paper:#f1ebe0;--paper2:#eae2d4;--card:#fbf8f2;--card2:#f4eee3;--ink:#211c16;--ink-soft:#6e6457;--ink-faint:#6f6656;--line:#211c161f;--line2:#211c1638;--shu:#c0392b;--shu-deep:#9c2c20;--shu-soft:#c0392b17;--shu-on-soft:#b13426;--on-shu:#fbf6ec;--ai:#2e4c73;--gold:#9a7b3f}[data-theme=dark]{color-scheme:dark;--paper:#14110d;--paper2:#0e0b08;--card:#1e1812;--card2:#241d15;--ink:#efe6d5;--ink-soft:#a99e8b;--ink-faint:#958b79;--line:#efe6d51f;--line2:#efe6d538;--shu:#e0644a;--shu-deep:#c8492e;--shu-soft:#e0644a21;--shu-on-soft:#e26e56;--on-shu:#14110d;--ai:#84a6d0;--gold:#c7a35f}*{box-sizing:border-box}html{background:var(--paper);color:var(--ink);-webkit-font-smoothing:antialiased;font-family:Zen Kaku Gothic New,Gothic Fallback,sans-serif}body{background:var(--paper);min-height:100vh;color:var(--ink);flex-direction:column;margin:0;transition:background .4s,color .4s;display:flex}::selection{background:var(--shu);color:var(--on-shu)}a{color:inherit}@keyframes breathe{0%,to{opacity:.5;transform:scale(1)}50%{opacity:.7;transform:scale(1.06)}}.site-header{z-index:50;backdrop-filter:saturate(1.2)blur(10px);background:color-mix(in srgb, var(--paper) 82%, transparent);border-bottom:1px solid var(--line);position:sticky;top:0}.header-inner{justify-content:space-between;align-items:center;gap:16px;max-width:1060px;height:68px;margin:0 auto;padding:0 24px;display:flex}.brand{color:inherit;align-items:center;gap:12px;text-decoration:none;display:flex}.brand-mark{background:var(--shu);width:38px;height:38px;color:var(--on-shu);border-radius:5px;place-items:center;font-size:21px;font-weight:700;display:grid;box-shadow:0 1px #00000026}.brand-mark--sm{width:32px;height:32px;font-size:18px}.brand-text{flex-direction:column;line-height:1.15;display:flex}.brand-name{letter-spacing:.04em;font-size:17px;font-weight:700}.brand-domain{color:var(--ink-faint);letter-spacing:.14em;font-size:10.5px;font-weight:400}.nav{align-items:center;gap:6px;display:flex}.nav-link{white-space:nowrap;min-width:44px;min-height:44px;color:inherit;opacity:.9;justify-content:center;align-items:center;padding:8px 14px;font-size:15px;font-weight:700;line-height:1.2;text-decoration:none;display:inline-flex;position:relative}.nav-link:hover{opacity:1}.nav-link.is-active:after{content:"";background:var(--shu);border-radius:2px;height:2px;position:absolute;bottom:6px;left:14px;right:14px}.theme-toggle{background:var(--card);border:1px solid var(--line2);cursor:pointer;border-radius:999px;align-items:center;min-height:44px;margin-left:6px;padding:3px;font-family:inherit;display:flex}.theme-toggle .seg{letter-spacing:.03em;color:var(--ink-faint);border-radius:999px;padding:8px 13px;font-size:12px;font-weight:700;line-height:1.2;transition:background .2s,color .2s}[data-theme=light] .theme-toggle .seg-light,[data-theme=dark] .theme-toggle .seg-dark{background:var(--shu);color:var(--on-shu)}.site-main{flex:1;width:100%;margin:0 auto;padding:0 24px}.section-head{align-items:baseline;gap:14px;margin-bottom:20px;display:flex}.section-head h2{letter-spacing:.04em;margin:0;font-family:Shippori Mincho,Mincho Fallback,serif;font-size:23px;font-weight:700}.section-head .sub{color:var(--ink-faint);font-size:13px}.eyebrow{align-items:center;gap:14px;margin-bottom:18px;display:flex}.eyebrow .rule{background:var(--shu);width:40px;height:1px}.eyebrow .label{letter-spacing:.3em;color:var(--shu);font-size:14px;font-weight:700}.site-footer{border-top:1px solid var(--line);margin-top:24px}.footer-inner{flex-wrap:wrap;justify-content:space-between;align-items:flex-start;gap:28px 48px;max-width:1060px;margin:0 auto;padding:40px 24px 56px;display:flex}.footer-about{max-width:340px}.footer-brand{align-items:center;gap:11px;margin-bottom:12px;display:flex}.footer-lead{color:var(--ink-soft);margin:0;font-size:13.5px;line-height:1.85}.footer-cols{flex-wrap:wrap;gap:48px;display:flex}.footer-col{flex-direction:column;gap:9px;display:flex}.footer-col-head{letter-spacing:.18em;color:var(--ink-faint);margin-bottom:3px;font-size:11px}.footer-col a,.footer-muted{color:var(--ink-soft);font-size:14px;text-decoration:none}.footer-col a:hover{color:var(--ink)}.footer-bar{border-top:1px solid var(--line)}.footer-bar-inner{max-width:1060px;color:var(--ink-faint);flex-wrap:wrap;justify-content:space-between;gap:8px;margin:0 auto;padding:16px 24px;font-size:12px;display:flex}@media (width<=560px){.brand-domain{display:none}.header-inner{flex-wrap:wrap;row-gap:4px;height:auto;min-height:68px;padding:10px 16px}.nav{flex-wrap:wrap;justify-content:flex-start;gap:2px;width:100%}.nav-link{padding:8px 10px;font-size:14px}.theme-toggle .seg{padding:8px 10px}.site-main{padding:0 16px}}.skip-link{z-index:100;background:var(--shu);color:var(--on-shu);border-radius:6px;padding:8px 14px;font-weight:700;text-decoration:none;position:absolute;top:-100px;left:8px}.skip-link:focus{top:8px}.site-main:focus{outline:none}a:focus-visible,button:focus-visible,[tabindex]:focus-visible{outline:2px solid var(--shu);outline-offset:2px;border-radius:4px}@media (prefers-reduced-motion:reduce){*,:before,:after{transition-duration:.01ms!important;animation-duration:.01ms!important;animation-iteration-count:1!important}}