.toc-box{border:1px solid var(--mist);border-radius:var(--radius);background:var(--paper-2);padding:18px 22px;margin-bottom:32px}
.toc-box summary{font-family:var(--mono);font-size:.78rem;letter-spacing:.08em;text-transform:uppercase;color:var(--signal-deep);font-weight:500;cursor:pointer;list-style:none}
.toc-box summary::-webkit-details-marker{display:none}
.toc-box summary::after{content:"▾";float:right;transition:transform var(--transition-base)}
.toc-box[open] summary::after{transform:rotate(180deg)}
.toc-box ul{margin-top:14px;display:flex;flex-direction:column;gap:8px}
.toc-box li a{font-size:.9rem;color:var(--slate);transition:color var(--transition-fast)}
.toc-box li a:hover,.toc-box li a.is-active{color:var(--signal-deep)}
.toc-box .toc-level-3{padding-left:16px}