.guide-index {margin-top:clamp(1.7rem,3vw,2.8rem);border-block:1px solid var(--rule);}
.guide-index summary {display:flex;align-items:center;justify-content:space-between;gap:1rem;min-height:3.2rem;padding:.45rem .16rem;cursor:pointer;list-style:none;color:var(--olive);font-weight:500;}
.guide-index summary::-webkit-details-marker{display:none;}
.guide-index summary>span{font-size:1.4rem;font-weight:400;margin-right:.2rem;}
.guide-index[open] summary>span{transform:rotate(45deg);}
.guide-index summary:focus-visible{outline:2px solid var(--rust);outline-offset:3px;}
.index-columns{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:1rem;padding:.55rem 0 1.45rem;}
.index-columns h3{font:400 1.45rem var(--serif);color:var(--olive);}
.index-columns ul{padding:0;margin:.38rem 0 0;list-style:none;}
.index-columns a{display:inline-block;font-size:.88rem;padding:.25rem 0;text-decoration:underline;text-decoration-color:#b9b39f;text-underline-offset:.17rem;}
@media(max-width:40rem){.index-columns{grid-template-columns:repeat(2,minmax(0,1fr));}}
@media(max-width:20rem){.index-columns{grid-template-columns:minmax(0,1fr);}}