/* Scope: replace the existing topic field; no new page section. */
.library-filters .t11-topic{display:grid;gap:8px;flex:1;min-width:180px;font-size:14px;min-width:0}
#t11-disclosure{position:relative;min-width:0;border:0;padding:0;font-size:inherit}
#t11-disclosure>summary{display:flex;align-items:center;justify-content:space-between;gap:12px;border:1px solid var(--line);padding:10px;min-height:46px;box-sizing:border-box;cursor:pointer;font-size:14px;line-height:24px;list-style:none;background:#fff;color:var(--ink)}
#t11-disclosure>summary::-webkit-details-marker{display:none}
#t11-disclosure>summary::after{content:'⌄';font-size:18px;color:var(--blue)}
#t11-disclosure[open]>summary::after{content:'⌃'}
.t11-panel{position:absolute;left:0;top:calc(100% + 8px);width:360px;max-width:calc(100vw - 40px);z-index:5;padding:18px;background:#fff;border:1px solid var(--line);box-shadow:0 8px 24px #252a321f;box-sizing:border-box}
.t11-hint{margin:0 0 12px;color:var(--blue);font-size:13px;font-weight:700}
.t11-shortcuts{display:grid;grid-template-columns:1fr 1fr;gap:8px;margin-bottom:18px}
.t11-shortcuts button{min-height:44px;border:1px solid var(--line);background:#fff;color:var(--ink);font-size:13px;font-weight:700;padding:10px;border-radius:4px;cursor:pointer}
.t11-shortcuts button:hover{border-color:var(--blue)}
.t11-shortcuts button[aria-pressed=true]{background:var(--blue);border-color:var(--blue);color:#fff}
.t11-panel label{display:block;min-width:0!important;font-size:13px;font-weight:700;margin-bottom:8px}
.t11-panel .t11-note{font-size:12px;line-height:1.6;color:var(--muted);margin:12px 0 0}
#library-count:focus-visible{outline:3px solid var(--blue);outline-offset:4px;scroll-margin-top:24px}
@media(max-width:650px){.library-filters .t11-topic{min-width:0}#t11-disclosure>summary{font-size:16px}.t11-panel{width:100%;padding:16px}}

/* Author grid rules must not override the initial hidden state. */
.t11-shortcuts[hidden],.t11-note[hidden]{display:none!important}
.t11-panel .t11-js-off{font-size:13px;line-height:1.6}