.vivix-reading-index{width:min(760px,calc(100% - 112px));margin:40px auto 0;border-top:1px solid var(--case-rule);border-bottom:1px solid var(--case-rule);font-size:13px;color:var(--case-muted)}
.case-chapter-essay{scroll-margin-top:110px}
.vivix-reading-index summary{display:flex;align-items:center;justify-content:space-between;list-style:none;cursor:pointer;padding:18px 0;letter-spacing:.04em;min-height:48px}
.vivix-reading-index summary::-webkit-details-marker{display:none}
.vivix-reading-index summary span{font-size:19px;font-weight:300}
.vivix-reading-index[open] summary span{transform:rotate(45deg)}
.vivix-reading-index nav{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:4px 28px;padding:2px 0 20px}
.vivix-reading-index a{color:inherit;text-decoration:none;padding:10px 0;line-height:1.7;min-height:44px}
.vivix-reading-index a:hover{color:var(--case-ink);text-decoration:underline;text-underline-offset:5px;text-decoration-color:var(--site-yellow,#FBB034)}
.vivix-reading-index :focus-visible{outline:2px solid var(--site-yellow,#FBB034);outline-offset:5px}
@media(max-width:760px){.vivix-reading-index{width:calc(100% - 36px);margin-top:30px}.vivix-reading-index nav{grid-template-columns:repeat(2,minmax(0,1fr));gap:2px 20px}}