.topnav{display:flex;gap:0;border-bottom:1px solid var(--rule);background:var(--paper-2);position:sticky;top:0;z-index:10}.topnav a{flex:1;text-align:center;padding:.7rem .4rem;color:var(--muted);text-decoration:none;font-family:var(--mincho);letter-spacing:.2em;min-height:44px;border-bottom:2px solid transparent}.topnav a[aria-current=page]{color:var(--ink);border-bottom-color:var(--ink)}.loading{text-align:center;color:var(--muted);padding:3rem 1rem;font-family:var(--mincho)}:root{--paper: #e9e5dc;--paper-2: #f2efe8;--ink: #191712;--ink-soft: #4a443a;--muted: #6b6459;--rule: #cdc6b7;--mincho: "Hiragino Mincho ProN", "Yu Mincho", "YuMincho", "MS PMincho", serif;--gothic: "Hiragino Sans", "Hiragino Kaku Gothic ProN", "Yu Gothic", "Meiryo", system-ui, sans-serif;--step-0: .94rem;--step-1: 1.06rem;--step-2: 1.35rem;--step-3: 1.9rem;--step-4: clamp(2.1rem, 5.5vw, 3.1rem)}@media(prefers-color-scheme:dark){:root{--paper: #15140f;--paper-2: #1d1b15;--ink: #e9e5dc;--ink-soft: #bdb6a7;--muted: #8e8677;--rule: #322d24}}:root[data-theme=dark]{--paper: #15140f;--paper-2: #1d1b15;--ink: #e9e5dc;--ink-soft: #bdb6a7;--muted: #8e8677;--rule: #322d24}:root[data-theme=light]{--paper: #e9e5dc;--paper-2: #f2efe8;--ink: #191712;--ink-soft: #4a443a;--muted: #6b6459;--rule: #cdc6b7}*{box-sizing:border-box}body{margin:0;background:var(--paper);color:var(--ink);font-family:var(--gothic);font-size:var(--step-0);line-height:1.75;-webkit-font-smoothing:antialiased}@media(prefers-reduced-motion:reduce){*,*:before,*:after{transition:none!important;animation:none!important}}