/* Home navigation: named rail on wide screens, compact disclosure on touch. */
#chapter-nav{position:fixed;right:16px;top:50%;transform:translateY(-50%);z-index:18;width:132px;padding:18px 10px;background:#ffffffed;border:1px solid #dce5ee;border-radius:16px;box-shadow:0 10px 40px #102e4810;backdrop-filter:blur(16px);color:#102e48}
#chapter-nav .chapter-label{font-size:9px;letter-spacing:.15em;font-weight:750;color:#607587;margin:0 0 12px;padding-left:9px}
#chapter-nav>button{display:none}
#chapter-nav .chapter-links{display:grid;gap:4px}
#chapter-nav a{display:flex;align-items:center;gap:8px;min-height:44px;padding:8px;border-radius:8px;font-size:12px;line-height:1.4;transition:background .3s,color .3s,transform .4s var(--ease)}
#chapter-nav i{font-size:9px;font-style:normal;font-variant-numeric:tabular-nums;color:#73899b;transition:color .3s}
#chapter-nav a.active{color:#155bd4;background:#eaf2ff;font-weight:750}
#chapter-nav a.active i{color:#155bd4}
#chapter-nav a:hover{background:#eef4fa;transform:translateX(-3px)}
#chapter-nav a:focus-visible,#chapter-nav>button:focus-visible{outline:3px solid #2776ec;outline-offset:2px}
.home-page #main>section:focus{outline:none}
@media(min-width:1200px){
 .home-page #main>.container,.home-page #main>.welcome-band>.container,.home-page #main>.visit-band>.container{width:calc(100% - 336px);max-width:1280px}
 .home-page #main>#word{width:calc(100% - 36px);padding-left:max(5%,72px);padding-right:168px;max-width:none}
}
@media(max-width:1199.98px){
 #chapter-nav{top:auto;bottom:24px;right:18px;transform:none;padding:0;width:auto;max-width:calc(100vw - 32px);border-radius:24px;display:block}
 #chapter-nav .chapter-label{display:none}
 #chapter-nav>button{display:flex;align-items:center;justify-content:space-between;gap:18px;min-height:48px;min-width:142px;max-width:100%;padding:10px 17px;font-size:12px;font-weight:650;border-radius:24px;background:#fff;color:#173546}
 #chapter-nav>button b{font-size:19px;font-weight:400;transition:transform .35s var(--ease)}
 #chapter-nav.expanded>button b{transform:rotate(45deg)}
 #chapter-nav .chapter-links{position:absolute;bottom:calc(100% + 10px);right:0;width:284px;max-width:calc(100vw - 32px);max-height:calc(100dvh - 220px);overflow-y:auto;grid-template-columns:1fr 1fr;gap:5px;background:#fff;padding:12px;border:1px solid #dce5ee;border-radius:16px;box-shadow:0 12px 40px #102e4826;visibility:hidden;opacity:0;transform:translateY(12px) scale(.97);transform-origin:bottom right;transition:opacity .25s,transform .35s var(--ease),visibility .35s}
 #chapter-nav.expanded .chapter-links{visibility:visible;opacity:1;transform:none}
 #chapter-nav a{min-height:48px;font-size:12px}
 #chapter-nav a:hover{transform:none}
}
@media(max-width:700px){#chapter-nav{bottom:calc(72px + env(safe-area-inset-bottom));right:16px}.home-page #footer{padding-bottom:160px}}

#chapter-nav[hidden]{display:none}